1 /*
   2  * Copyright (c) 1997, 2011, 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/javaClasses.hpp"
  29 #include "classfile/symbolTable.hpp"
  30 #include "classfile/systemDictionary.hpp"
  31 #include "classfile/verificationType.hpp"
  32 #include "classfile/verifier.hpp"
  33 #include "classfile/vmSymbols.hpp"
  34 #include "memory/allocation.hpp"
  35 #include "memory/gcLocker.hpp"
  36 #include "memory/oopFactory.hpp"
  37 #include "memory/universe.inline.hpp"
  38 #include "oops/constantPoolOop.hpp"
  39 #include "oops/fieldStreams.hpp"
  40 #include "oops/instanceKlass.hpp"
  41 #include "oops/instanceMirrorKlass.hpp"
  42 #include "oops/klass.inline.hpp"
  43 #include "oops/klassOop.hpp"
  44 #include "oops/klassVtable.hpp"
  45 #include "oops/methodOop.hpp"
  46 #include "oops/symbol.hpp"
  47 #include "prims/jvmtiExport.hpp"
  48 #include "prims/jvmtiThreadState.hpp"
  49 #include "runtime/javaCalls.hpp"
  50 #include "runtime/perfData.hpp"
  51 #include "runtime/reflection.hpp"
  52 #include "runtime/signature.hpp"
  53 #include "runtime/timer.hpp"
  54 #include "services/classLoadingService.hpp"
  55 #include "services/threadService.hpp"
  56 
  57 // We generally try to create the oops directly when parsing, rather than
  58 // allocating temporary data structures and copying the bytes twice. A
  59 // temporary area is only needed when parsing utf8 entries in the constant
  60 // pool and when parsing line number tables.
  61 
  62 // We add assert in debug mode when class format is not checked.
  63 
  64 #define JAVA_CLASSFILE_MAGIC              0xCAFEBABE
  65 #define JAVA_MIN_SUPPORTED_VERSION        45
  66 #define JAVA_MAX_SUPPORTED_VERSION        51
  67 #define JAVA_MAX_SUPPORTED_MINOR_VERSION  0
  68 
  69 // Used for two backward compatibility reasons:
  70 // - to check for new additions to the class file format in JDK1.5
  71 // - to check for bug fixes in the format checker in JDK1.5
  72 #define JAVA_1_5_VERSION                  49
  73 
  74 // Used for backward compatibility reasons:
  75 // - to check for javac bug fixes that happened after 1.5
  76 // - also used as the max version when running in jdk6
  77 #define JAVA_6_VERSION                    50
  78 
  79 // Used for backward compatibility reasons:
  80 // - to check NameAndType_info signatures more aggressively
  81 #define JAVA_7_VERSION                    51
  82 
  83 
  84 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) {
  85   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
  86   // this function (_current can be allocated in a register, with scalar
  87   // replacement of aggregates). The _current pointer is copied back to
  88   // stream() when this function returns. DON'T call another method within
  89   // this method that uses stream().
  90   ClassFileStream* cfs0 = stream();
  91   ClassFileStream cfs1 = *cfs0;
  92   ClassFileStream* cfs = &cfs1;
  93 #ifdef ASSERT
  94   assert(cfs->allocated_on_stack(),"should be local");
  95   u1* old_current = cfs0->current();
  96 #endif
  97 
  98   // Used for batching symbol allocations.
  99   const char* names[SymbolTable::symbol_alloc_batch_size];
 100   int lengths[SymbolTable::symbol_alloc_batch_size];
 101   int indices[SymbolTable::symbol_alloc_batch_size];
 102   unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
 103   int names_count = 0;
 104 
 105   // parsing  Index 0 is unused
 106   for (int index = 1; index < length; index++) {
 107     // Each of the following case guarantees one more byte in the stream
 108     // for the following tag or the access_flags following constant pool,
 109     // so we don't need bounds-check for reading tag.
 110     u1 tag = cfs->get_u1_fast();
 111     switch (tag) {
 112       case JVM_CONSTANT_Class :
 113         {
 114           cfs->guarantee_more(3, CHECK);  // name_index, tag/access_flags
 115           u2 name_index = cfs->get_u2_fast();
 116           cp->klass_index_at_put(index, name_index);
 117         }
 118         break;
 119       case JVM_CONSTANT_Fieldref :
 120         {
 121           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 122           u2 class_index = cfs->get_u2_fast();
 123           u2 name_and_type_index = cfs->get_u2_fast();
 124           cp->field_at_put(index, class_index, name_and_type_index);
 125         }
 126         break;
 127       case JVM_CONSTANT_Methodref :
 128         {
 129           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 130           u2 class_index = cfs->get_u2_fast();
 131           u2 name_and_type_index = cfs->get_u2_fast();
 132           cp->method_at_put(index, class_index, name_and_type_index);
 133         }
 134         break;
 135       case JVM_CONSTANT_InterfaceMethodref :
 136         {
 137           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 138           u2 class_index = cfs->get_u2_fast();
 139           u2 name_and_type_index = cfs->get_u2_fast();
 140           cp->interface_method_at_put(index, class_index, name_and_type_index);
 141         }
 142         break;
 143       case JVM_CONSTANT_String :
 144         {
 145           cfs->guarantee_more(3, CHECK);  // string_index, tag/access_flags
 146           u2 string_index = cfs->get_u2_fast();
 147           cp->string_index_at_put(index, string_index);
 148         }
 149         break;
 150       case JVM_CONSTANT_MethodHandle :
 151       case JVM_CONSTANT_MethodType :
 152         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 153           classfile_parse_error(
 154             "Class file version does not support constant tag %u in class file %s",
 155             tag, CHECK);
 156         }
 157         if (!EnableInvokeDynamic) {
 158           classfile_parse_error(
 159             "This JVM does not support constant tag %u in class file %s",
 160             tag, CHECK);
 161         }
 162         if (tag == JVM_CONSTANT_MethodHandle) {
 163           cfs->guarantee_more(4, CHECK);  // ref_kind, method_index, tag/access_flags
 164           u1 ref_kind = cfs->get_u1_fast();
 165           u2 method_index = cfs->get_u2_fast();
 166           cp->method_handle_index_at_put(index, ref_kind, method_index);
 167         } else if (tag == JVM_CONSTANT_MethodType) {
 168           cfs->guarantee_more(3, CHECK);  // signature_index, tag/access_flags
 169           u2 signature_index = cfs->get_u2_fast();
 170           cp->method_type_index_at_put(index, signature_index);
 171         } else {
 172           ShouldNotReachHere();
 173         }
 174         break;
 175       case JVM_CONSTANT_InvokeDynamic :
 176         {
 177           if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 178             classfile_parse_error(
 179               "Class file version does not support constant tag %u in class file %s",
 180               tag, CHECK);
 181           }
 182           if (!EnableInvokeDynamic) {
 183             classfile_parse_error(
 184               "This JVM does not support constant tag %u in class file %s",
 185               tag, CHECK);
 186           }
 187           cfs->guarantee_more(5, CHECK);  // bsm_index, nt, tag/access_flags
 188           u2 bootstrap_specifier_index = cfs->get_u2_fast();
 189           u2 name_and_type_index = cfs->get_u2_fast();
 190           if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
 191             _max_bootstrap_specifier_index = (int) bootstrap_specifier_index;  // collect for later
 192           cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
 193         }
 194         break;
 195       case JVM_CONSTANT_Integer :
 196         {
 197           cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 198           u4 bytes = cfs->get_u4_fast();
 199           cp->int_at_put(index, (jint) bytes);
 200         }
 201         break;
 202       case JVM_CONSTANT_Float :
 203         {
 204           cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 205           u4 bytes = cfs->get_u4_fast();
 206           cp->float_at_put(index, *(jfloat*)&bytes);
 207         }
 208         break;
 209       case JVM_CONSTANT_Long :
 210         // A mangled type might cause you to overrun allocated memory
 211         guarantee_property(index+1 < length,
 212                            "Invalid constant pool entry %u in class file %s",
 213                            index, CHECK);
 214         {
 215           cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 216           u8 bytes = cfs->get_u8_fast();
 217           cp->long_at_put(index, bytes);
 218         }
 219         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 220         break;
 221       case JVM_CONSTANT_Double :
 222         // A mangled type might cause you to overrun allocated memory
 223         guarantee_property(index+1 < length,
 224                            "Invalid constant pool entry %u in class file %s",
 225                            index, CHECK);
 226         {
 227           cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 228           u8 bytes = cfs->get_u8_fast();
 229           cp->double_at_put(index, *(jdouble*)&bytes);
 230         }
 231         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 232         break;
 233       case JVM_CONSTANT_NameAndType :
 234         {
 235           cfs->guarantee_more(5, CHECK);  // name_index, signature_index, tag/access_flags
 236           u2 name_index = cfs->get_u2_fast();
 237           u2 signature_index = cfs->get_u2_fast();
 238           cp->name_and_type_at_put(index, name_index, signature_index);
 239         }
 240         break;
 241       case JVM_CONSTANT_Utf8 :
 242         {
 243           cfs->guarantee_more(2, CHECK);  // utf8_length
 244           u2  utf8_length = cfs->get_u2_fast();
 245           u1* utf8_buffer = cfs->get_u1_buffer();
 246           assert(utf8_buffer != NULL, "null utf8 buffer");
 247           // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
 248           cfs->guarantee_more(utf8_length+1, CHECK);  // utf8 string, tag/access_flags
 249           cfs->skip_u1_fast(utf8_length);
 250 
 251           // Before storing the symbol, make sure it's legal
 252           if (_need_verify) {
 253             verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
 254           }
 255 
 256           if (EnableInvokeDynamic && has_cp_patch_at(index)) {
 257             Handle patch = clear_cp_patch_at(index);
 258             guarantee_property(java_lang_String::is_instance(patch()),
 259                                "Illegal utf8 patch at %d in class file %s",
 260                                index, CHECK);
 261             char* str = java_lang_String::as_utf8_string(patch());
 262             // (could use java_lang_String::as_symbol instead, but might as well batch them)
 263             utf8_buffer = (u1*) str;
 264             utf8_length = (int) strlen(str);
 265           }
 266 
 267           unsigned int hash;
 268           Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
 269           if (result == NULL) {
 270             names[names_count] = (char*)utf8_buffer;
 271             lengths[names_count] = utf8_length;
 272             indices[names_count] = index;
 273             hashValues[names_count++] = hash;
 274             if (names_count == SymbolTable::symbol_alloc_batch_size) {
 275               SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
 276               names_count = 0;
 277             }
 278           } else {
 279             cp->symbol_at_put(index, result);
 280           }
 281         }
 282         break;
 283       default:
 284         classfile_parse_error(
 285           "Unknown constant tag %u in class file %s", tag, CHECK);
 286         break;
 287     }
 288   }
 289 
 290   // Allocate the remaining symbols
 291   if (names_count > 0) {
 292     SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
 293   }
 294 
 295   // Copy _current pointer of local copy back to stream().
 296 #ifdef ASSERT
 297   assert(cfs0->current() == old_current, "non-exclusive use of stream()");
 298 #endif
 299   cfs0->set_current(cfs1.current());
 300 }
 301 
 302 // This class unreferences constant pool symbols if an error has occurred
 303 // while parsing the class before it is assigned into the class.
 304 // If it gets an error after that it is unloaded and the constant pool will
 305 // be cleaned up then.
 306 class ConstantPoolCleaner : public StackObj {
 307   constantPoolHandle _cphandle;
 308   bool               _in_error;
 309  public:
 310   ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {}
 311   ~ConstantPoolCleaner() {
 312     if (_in_error && _cphandle.not_null()) {
 313       _cphandle->unreference_symbols();
 314     }
 315   }
 316   void set_in_error(bool clean) { _in_error = clean; }
 317 };
 318 
 319 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
 320 
 321 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
 322   ClassFileStream* cfs = stream();
 323   constantPoolHandle nullHandle;
 324 
 325   cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
 326   u2 length = cfs->get_u2_fast();
 327   guarantee_property(
 328     length >= 1, "Illegal constant pool size %u in class file %s",
 329     length, CHECK_(nullHandle));
 330   constantPoolOop constant_pool =
 331                       oopFactory::new_constantPool(length,
 332                                                    oopDesc::IsSafeConc,
 333                                                    CHECK_(nullHandle));
 334   constantPoolHandle cp (THREAD, constant_pool);
 335 
 336   cp->set_partially_loaded();    // Enables heap verify to work on partial constantPoolOops
 337   ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up.
 338 
 339   // parsing constant pool entries
 340   parse_constant_pool_entries(cp, length, CHECK_(nullHandle));
 341 
 342   int index = 1;  // declared outside of loops for portability
 343 
 344   // first verification pass - validate cross references and fixup class and string constants
 345   for (index = 1; index < length; index++) {          // Index 0 is unused
 346     jbyte tag = cp->tag_at(index).value();
 347     switch (tag) {
 348       case JVM_CONSTANT_Class :
 349         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 350         break;
 351       case JVM_CONSTANT_Fieldref :
 352         // fall through
 353       case JVM_CONSTANT_Methodref :
 354         // fall through
 355       case JVM_CONSTANT_InterfaceMethodref : {
 356         if (!_need_verify) break;
 357         int klass_ref_index = cp->klass_ref_index_at(index);
 358         int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
 359         check_property(valid_cp_range(klass_ref_index, length) &&
 360                        is_klass_reference(cp, klass_ref_index),
 361                        "Invalid constant pool index %u in class file %s",
 362                        klass_ref_index,
 363                        CHECK_(nullHandle));
 364         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 365                        cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 366                        "Invalid constant pool index %u in class file %s",
 367                        name_and_type_ref_index,
 368                        CHECK_(nullHandle));
 369         break;
 370       }
 371       case JVM_CONSTANT_String :
 372         ShouldNotReachHere();     // Only JVM_CONSTANT_StringIndex should be present
 373         break;
 374       case JVM_CONSTANT_Integer :
 375         break;
 376       case JVM_CONSTANT_Float :
 377         break;
 378       case JVM_CONSTANT_Long :
 379       case JVM_CONSTANT_Double :
 380         index++;
 381         check_property(
 382           (index < length && cp->tag_at(index).is_invalid()),
 383           "Improper constant pool long/double index %u in class file %s",
 384           index, CHECK_(nullHandle));
 385         break;
 386       case JVM_CONSTANT_NameAndType : {
 387         if (!_need_verify) break;
 388         int name_ref_index = cp->name_ref_index_at(index);
 389         int signature_ref_index = cp->signature_ref_index_at(index);
 390         check_property(
 391           valid_cp_range(name_ref_index, length) &&
 392             cp->tag_at(name_ref_index).is_utf8(),
 393           "Invalid constant pool index %u in class file %s",
 394           name_ref_index, CHECK_(nullHandle));
 395         check_property(
 396           valid_cp_range(signature_ref_index, length) &&
 397             cp->tag_at(signature_ref_index).is_utf8(),
 398           "Invalid constant pool index %u in class file %s",
 399           signature_ref_index, CHECK_(nullHandle));
 400         break;
 401       }
 402       case JVM_CONSTANT_Utf8 :
 403         break;
 404       case JVM_CONSTANT_UnresolvedClass :         // fall-through
 405       case JVM_CONSTANT_UnresolvedClassInError:
 406         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 407         break;
 408       case JVM_CONSTANT_ClassIndex :
 409         {
 410           int class_index = cp->klass_index_at(index);
 411           check_property(
 412             valid_cp_range(class_index, length) &&
 413               cp->tag_at(class_index).is_utf8(),
 414             "Invalid constant pool index %u in class file %s",
 415             class_index, CHECK_(nullHandle));
 416           cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
 417         }
 418         break;
 419       case JVM_CONSTANT_UnresolvedString :
 420         ShouldNotReachHere();     // Only JVM_CONSTANT_StringIndex should be present
 421         break;
 422       case JVM_CONSTANT_StringIndex :
 423         {
 424           int string_index = cp->string_index_at(index);
 425           check_property(
 426             valid_cp_range(string_index, length) &&
 427               cp->tag_at(string_index).is_utf8(),
 428             "Invalid constant pool index %u in class file %s",
 429             string_index, CHECK_(nullHandle));
 430           Symbol* sym = cp->symbol_at(string_index);
 431           cp->unresolved_string_at_put(index, sym);
 432         }
 433         break;
 434       case JVM_CONSTANT_MethodHandle :
 435         {
 436           int ref_index = cp->method_handle_index_at(index);
 437           check_property(
 438             valid_cp_range(ref_index, length) &&
 439                 EnableInvokeDynamic,
 440               "Invalid constant pool index %u in class file %s",
 441               ref_index, CHECK_(nullHandle));
 442           constantTag tag = cp->tag_at(ref_index);
 443           int ref_kind  = cp->method_handle_ref_kind_at(index);
 444           switch (ref_kind) {
 445           case JVM_REF_getField:
 446           case JVM_REF_getStatic:
 447           case JVM_REF_putField:
 448           case JVM_REF_putStatic:
 449             check_property(
 450               tag.is_field(),
 451               "Invalid constant pool index %u in class file %s (not a field)",
 452               ref_index, CHECK_(nullHandle));
 453             break;
 454           case JVM_REF_invokeVirtual:
 455           case JVM_REF_invokeStatic:
 456           case JVM_REF_invokeSpecial:
 457           case JVM_REF_newInvokeSpecial:
 458             check_property(
 459               tag.is_method(),
 460               "Invalid constant pool index %u in class file %s (not a method)",
 461               ref_index, CHECK_(nullHandle));
 462             break;
 463           case JVM_REF_invokeInterface:
 464             check_property(
 465               tag.is_interface_method(),
 466               "Invalid constant pool index %u in class file %s (not an interface method)",
 467               ref_index, CHECK_(nullHandle));
 468             break;
 469           default:
 470             classfile_parse_error(
 471               "Bad method handle kind at constant pool index %u in class file %s",
 472               index, CHECK_(nullHandle));
 473           }
 474           // Keep the ref_index unchanged.  It will be indirected at link-time.
 475         }
 476         break;
 477       case JVM_CONSTANT_MethodType :
 478         {
 479           int ref_index = cp->method_type_index_at(index);
 480           check_property(
 481             valid_cp_range(ref_index, length) &&
 482                 cp->tag_at(ref_index).is_utf8() &&
 483                 EnableInvokeDynamic,
 484               "Invalid constant pool index %u in class file %s",
 485               ref_index, CHECK_(nullHandle));
 486         }
 487         break;
 488       case JVM_CONSTANT_InvokeDynamic :
 489         {
 490           int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
 491           check_property(valid_cp_range(name_and_type_ref_index, length) &&
 492                          cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 493                          "Invalid constant pool index %u in class file %s",
 494                          name_and_type_ref_index,
 495                          CHECK_(nullHandle));
 496           // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
 497           break;
 498         }
 499       default:
 500         fatal(err_msg("bad constant pool tag value %u",
 501                       cp->tag_at(index).value()));
 502         ShouldNotReachHere();
 503         break;
 504     } // end of switch
 505   } // end of for
 506 
 507   if (_cp_patches != NULL) {
 508     // need to treat this_class specially...
 509     assert(EnableInvokeDynamic, "");
 510     int this_class_index;
 511     {
 512       cfs->guarantee_more(8, CHECK_(nullHandle));  // flags, this_class, super_class, infs_len
 513       u1* mark = cfs->current();
 514       u2 flags         = cfs->get_u2_fast();
 515       this_class_index = cfs->get_u2_fast();
 516       cfs->set_current(mark);  // revert to mark
 517     }
 518 
 519     for (index = 1; index < length; index++) {          // Index 0 is unused
 520       if (has_cp_patch_at(index)) {
 521         guarantee_property(index != this_class_index,
 522                            "Illegal constant pool patch to self at %d in class file %s",
 523                            index, CHECK_(nullHandle));
 524         patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
 525       }
 526     }
 527     // Ensure that all the patches have been used.
 528     for (index = 0; index < _cp_patches->length(); index++) {
 529       guarantee_property(!has_cp_patch_at(index),
 530                          "Unused constant pool patch at %d in class file %s",
 531                          index, CHECK_(nullHandle));
 532     }
 533   }
 534 
 535   if (!_need_verify) {
 536     cp_in_error.set_in_error(false);
 537     return cp;
 538   }
 539 
 540   // second verification pass - checks the strings are of the right format.
 541   // but not yet to the other entries
 542   for (index = 1; index < length; index++) {
 543     jbyte tag = cp->tag_at(index).value();
 544     switch (tag) {
 545       case JVM_CONSTANT_UnresolvedClass: {
 546         Symbol*  class_name = cp->unresolved_klass_at(index);
 547         // check the name, even if _cp_patches will overwrite it
 548         verify_legal_class_name(class_name, CHECK_(nullHandle));
 549         break;
 550       }
 551       case JVM_CONSTANT_NameAndType: {
 552         if (_need_verify && _major_version >= JAVA_7_VERSION) {
 553           int sig_index = cp->signature_ref_index_at(index);
 554           int name_index = cp->name_ref_index_at(index);
 555           Symbol*  name = cp->symbol_at(name_index);
 556           Symbol*  sig = cp->symbol_at(sig_index);
 557           if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
 558             verify_legal_method_signature(name, sig, CHECK_(nullHandle));
 559           } else {
 560             verify_legal_field_signature(name, sig, CHECK_(nullHandle));
 561           }
 562         }
 563         break;
 564       }
 565       case JVM_CONSTANT_InvokeDynamic:
 566       case JVM_CONSTANT_Fieldref:
 567       case JVM_CONSTANT_Methodref:
 568       case JVM_CONSTANT_InterfaceMethodref: {
 569         int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
 570         // already verified to be utf8
 571         int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
 572         // already verified to be utf8
 573         int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
 574         Symbol*  name = cp->symbol_at(name_ref_index);
 575         Symbol*  signature = cp->symbol_at(signature_ref_index);
 576         if (tag == JVM_CONSTANT_Fieldref) {
 577           verify_legal_field_name(name, CHECK_(nullHandle));
 578           if (_need_verify && _major_version >= JAVA_7_VERSION) {
 579             // Signature is verified above, when iterating NameAndType_info.
 580             // Need only to be sure it's the right type.
 581             if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
 582               throwIllegalSignature(
 583                   "Field", name, signature, CHECK_(nullHandle));
 584             }
 585           } else {
 586             verify_legal_field_signature(name, signature, CHECK_(nullHandle));
 587           }
 588         } else {
 589           verify_legal_method_name(name, CHECK_(nullHandle));
 590           if (_need_verify && _major_version >= JAVA_7_VERSION) {
 591             // Signature is verified above, when iterating NameAndType_info.
 592             // Need only to be sure it's the right type.
 593             if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
 594               throwIllegalSignature(
 595                   "Method", name, signature, CHECK_(nullHandle));
 596             }
 597           } else {
 598             verify_legal_method_signature(name, signature, CHECK_(nullHandle));
 599           }
 600           if (tag == JVM_CONSTANT_Methodref) {
 601             // 4509014: If a class method name begins with '<', it must be "<init>".
 602             assert(name != NULL, "method name in constant pool is null");
 603             unsigned int name_len = name->utf8_length();
 604             assert(name_len > 0, "bad method name");  // already verified as legal name
 605             if (name->byte_at(0) == '<') {
 606               if (name != vmSymbols::object_initializer_name()) {
 607                 classfile_parse_error(
 608                   "Bad method name at constant pool index %u in class file %s",
 609                   name_ref_index, CHECK_(nullHandle));
 610               }
 611             }
 612           }
 613         }
 614         break;
 615       }
 616       case JVM_CONSTANT_MethodHandle: {
 617         int ref_index = cp->method_handle_index_at(index);
 618         int ref_kind  = cp->method_handle_ref_kind_at(index);
 619         switch (ref_kind) {
 620         case JVM_REF_invokeVirtual:
 621         case JVM_REF_invokeStatic:
 622         case JVM_REF_invokeSpecial:
 623         case JVM_REF_newInvokeSpecial:
 624           {
 625             int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
 626             int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
 627             Symbol*  name = cp->symbol_at(name_ref_index);
 628             if (ref_kind == JVM_REF_newInvokeSpecial) {
 629               if (name != vmSymbols::object_initializer_name()) {
 630                 classfile_parse_error(
 631                   "Bad constructor name at constant pool index %u in class file %s",
 632                   name_ref_index, CHECK_(nullHandle));
 633               }
 634             } else {
 635               if (name == vmSymbols::object_initializer_name()) {
 636                 classfile_parse_error(
 637                   "Bad method name at constant pool index %u in class file %s",
 638                   name_ref_index, CHECK_(nullHandle));
 639               }
 640             }
 641           }
 642           break;
 643           // Other ref_kinds are already fully checked in previous pass.
 644         }
 645         break;
 646       }
 647       case JVM_CONSTANT_MethodType: {
 648         Symbol* no_name = vmSymbols::type_name(); // place holder
 649         Symbol*  signature = cp->method_type_signature_at(index);
 650         verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
 651         break;
 652       }
 653       case JVM_CONSTANT_Utf8: {
 654         assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
 655       }
 656     }  // end of switch
 657   }  // end of for
 658 
 659   cp_in_error.set_in_error(false);
 660   return cp;
 661 }
 662 
 663 
 664 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
 665   assert(EnableInvokeDynamic, "");
 666   BasicType patch_type = T_VOID;
 667   switch (cp->tag_at(index).value()) {
 668 
 669   case JVM_CONSTANT_UnresolvedClass :
 670     // Patching a class means pre-resolving it.
 671     // The name in the constant pool is ignored.
 672     if (java_lang_Class::is_instance(patch())) {
 673       guarantee_property(!java_lang_Class::is_primitive(patch()),
 674                          "Illegal class patch at %d in class file %s",
 675                          index, CHECK);
 676       cp->klass_at_put(index, java_lang_Class::as_klassOop(patch()));
 677     } else {
 678       guarantee_property(java_lang_String::is_instance(patch()),
 679                          "Illegal class patch at %d in class file %s",
 680                          index, CHECK);
 681       Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
 682       cp->unresolved_klass_at_put(index, name);
 683     }
 684     break;
 685 
 686   case JVM_CONSTANT_UnresolvedString :
 687     // Patching a string means pre-resolving it.
 688     // The spelling in the constant pool is ignored.
 689     // The constant reference may be any object whatever.
 690     // If it is not a real interned string, the constant is referred
 691     // to as a "pseudo-string", and must be presented to the CP
 692     // explicitly, because it may require scavenging.
 693     cp->pseudo_string_at_put(index, patch());
 694     break;
 695 
 696   case JVM_CONSTANT_Integer : patch_type = T_INT;    goto patch_prim;
 697   case JVM_CONSTANT_Float :   patch_type = T_FLOAT;  goto patch_prim;
 698   case JVM_CONSTANT_Long :    patch_type = T_LONG;   goto patch_prim;
 699   case JVM_CONSTANT_Double :  patch_type = T_DOUBLE; goto patch_prim;
 700   patch_prim:
 701     {
 702       jvalue value;
 703       BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
 704       guarantee_property(value_type == patch_type,
 705                          "Illegal primitive patch at %d in class file %s",
 706                          index, CHECK);
 707       switch (value_type) {
 708       case T_INT:    cp->int_at_put(index,   value.i); break;
 709       case T_FLOAT:  cp->float_at_put(index, value.f); break;
 710       case T_LONG:   cp->long_at_put(index,  value.j); break;
 711       case T_DOUBLE: cp->double_at_put(index, value.d); break;
 712       default:       assert(false, "");
 713       }
 714     }
 715     break;
 716 
 717   default:
 718     // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
 719     guarantee_property(!has_cp_patch_at(index),
 720                        "Illegal unexpected patch at %d in class file %s",
 721                        index, CHECK);
 722     return;
 723   }
 724 
 725   // On fall-through, mark the patch as used.
 726   clear_cp_patch_at(index);
 727 }
 728 
 729 
 730 
 731 class NameSigHash: public ResourceObj {
 732  public:
 733   Symbol*       _name;       // name
 734   Symbol*       _sig;        // signature
 735   NameSigHash*  _next;       // Next entry in hash table
 736 };
 737 
 738 
 739 #define HASH_ROW_SIZE 256
 740 
 741 unsigned int hash(Symbol* name, Symbol* sig) {
 742   unsigned int raw_hash = 0;
 743   raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
 744   raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
 745 
 746   return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
 747 }
 748 
 749 
 750 void initialize_hashtable(NameSigHash** table) {
 751   memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
 752 }
 753 
 754 // Return false if the name/sig combination is found in table.
 755 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
 756 // The old format checker uses heap sort to find duplicates.
 757 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
 758 // of table since we don't expect Symbol*'s to move.
 759 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
 760   assert(name != NULL, "name in constant pool is NULL");
 761 
 762   // First lookup for duplicates
 763   int index = hash(name, sig);
 764   NameSigHash* entry = table[index];
 765   while (entry != NULL) {
 766     if (entry->_name == name && entry->_sig == sig) {
 767       return false;
 768     }
 769     entry = entry->_next;
 770   }
 771 
 772   // No duplicate is found, allocate a new entry and fill it.
 773   entry = new NameSigHash();
 774   entry->_name = name;
 775   entry->_sig = sig;
 776 
 777   // Insert into hash table
 778   entry->_next = table[index];
 779   table[index] = entry;
 780 
 781   return true;
 782 }
 783 
 784 
 785 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
 786                                                  int length,
 787                                                  Handle class_loader,
 788                                                  Handle protection_domain,
 789                                                  Symbol* class_name,
 790                                                  TRAPS) {
 791   ClassFileStream* cfs = stream();
 792   assert(length > 0, "only called for length>0");
 793   objArrayHandle nullHandle;
 794   objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
 795   objArrayHandle interfaces (THREAD, interface_oop);
 796 
 797   int index;
 798   for (index = 0; index < length; index++) {
 799     u2 interface_index = cfs->get_u2(CHECK_(nullHandle));
 800     KlassHandle interf;
 801     check_property(
 802       valid_cp_range(interface_index, cp->length()) &&
 803       is_klass_reference(cp, interface_index),
 804       "Interface name has bad constant pool index %u in class file %s",
 805       interface_index, CHECK_(nullHandle));
 806     if (cp->tag_at(interface_index).is_klass()) {
 807       interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
 808     } else {
 809       Symbol*  unresolved_klass  = cp->klass_name_at(interface_index);
 810 
 811       // Don't need to check legal name because it's checked when parsing constant pool.
 812       // But need to make sure it's not an array type.
 813       guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
 814                          "Bad interface name in class file %s", CHECK_(nullHandle));
 815 
 816       // Call resolve_super so classcircularity is checked
 817       klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
 818                     unresolved_klass, class_loader, protection_domain,
 819                     false, CHECK_(nullHandle));
 820       interf = KlassHandle(THREAD, k);
 821 
 822       if (LinkWellKnownClasses)  // my super type is well known to me
 823         cp->klass_at_put(interface_index, interf()); // eagerly resolve
 824     }
 825 
 826     if (!Klass::cast(interf())->is_interface()) {
 827       THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle);
 828     }
 829     interfaces->obj_at_put(index, interf());
 830   }
 831 
 832   if (!_need_verify || length <= 1) {
 833     return interfaces;
 834   }
 835 
 836   // Check if there's any duplicates in interfaces
 837   ResourceMark rm(THREAD);
 838   NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
 839     THREAD, NameSigHash*, HASH_ROW_SIZE);
 840   initialize_hashtable(interface_names);
 841   bool dup = false;
 842   {
 843     debug_only(No_Safepoint_Verifier nsv;)
 844     for (index = 0; index < length; index++) {
 845       klassOop k = (klassOop)interfaces->obj_at(index);
 846       Symbol* name = instanceKlass::cast(k)->name();
 847       // If no duplicates, add (name, NULL) in hashtable interface_names.
 848       if (!put_after_lookup(name, NULL, interface_names)) {
 849         dup = true;
 850         break;
 851       }
 852     }
 853   }
 854   if (dup) {
 855     classfile_parse_error("Duplicate interface name in class file %s",
 856                           CHECK_(nullHandle));
 857   }
 858 
 859   return interfaces;
 860 }
 861 
 862 
 863 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
 864   // Make sure the constant pool entry is of a type appropriate to this field
 865   guarantee_property(
 866     (constantvalue_index > 0 &&
 867       constantvalue_index < cp->length()),
 868     "Bad initial value index %u in ConstantValue attribute in class file %s",
 869     constantvalue_index, CHECK);
 870   constantTag value_type = cp->tag_at(constantvalue_index);
 871   switch ( cp->basic_type_for_signature_at(signature_index) ) {
 872     case T_LONG:
 873       guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
 874       break;
 875     case T_FLOAT:
 876       guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
 877       break;
 878     case T_DOUBLE:
 879       guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
 880       break;
 881     case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
 882       guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
 883       break;
 884     case T_OBJECT:
 885       guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
 886                          && (value_type.is_string() || value_type.is_unresolved_string())),
 887                          "Bad string initial value in class file %s", CHECK);
 888       break;
 889     default:
 890       classfile_parse_error(
 891         "Unable to set initial value %u in class file %s",
 892         constantvalue_index, CHECK);
 893   }
 894 }
 895 
 896 
 897 // Parse attributes for a field.
 898 void ClassFileParser::parse_field_attributes(constantPoolHandle cp,
 899                                              u2 attributes_count,
 900                                              bool is_static, u2 signature_index,
 901                                              u2* constantvalue_index_addr,
 902                                              bool* is_synthetic_addr,
 903                                              u2* generic_signature_index_addr,
 904                                              typeArrayHandle* field_annotations,
 905                                              TRAPS) {
 906   ClassFileStream* cfs = stream();
 907   assert(attributes_count > 0, "length should be greater than 0");
 908   u2 constantvalue_index = 0;
 909   u2 generic_signature_index = 0;
 910   bool is_synthetic = false;
 911   u1* runtime_visible_annotations = NULL;
 912   int runtime_visible_annotations_length = 0;
 913   u1* runtime_invisible_annotations = NULL;
 914   int runtime_invisible_annotations_length = 0;
 915   while (attributes_count--) {
 916     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
 917     u2 attribute_name_index = cfs->get_u2_fast();
 918     u4 attribute_length = cfs->get_u4_fast();
 919     check_property(valid_cp_range(attribute_name_index, cp->length()) &&
 920                    cp->tag_at(attribute_name_index).is_utf8(),
 921                    "Invalid field attribute index %u in class file %s",
 922                    attribute_name_index,
 923                    CHECK);
 924     Symbol* attribute_name = cp->symbol_at(attribute_name_index);
 925     if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
 926       // ignore if non-static
 927       if (constantvalue_index != 0) {
 928         classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
 929       }
 930       check_property(
 931         attribute_length == 2,
 932         "Invalid ConstantValue field attribute length %u in class file %s",
 933         attribute_length, CHECK);
 934       constantvalue_index = cfs->get_u2(CHECK);
 935       if (_need_verify) {
 936         verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
 937       }
 938     } else if (attribute_name == vmSymbols::tag_synthetic()) {
 939       if (attribute_length != 0) {
 940         classfile_parse_error(
 941           "Invalid Synthetic field attribute length %u in class file %s",
 942           attribute_length, CHECK);
 943       }
 944       is_synthetic = true;
 945     } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
 946       if (attribute_length != 0) {
 947         classfile_parse_error(
 948           "Invalid Deprecated field attribute length %u in class file %s",
 949           attribute_length, CHECK);
 950       }
 951     } else if (_major_version >= JAVA_1_5_VERSION) {
 952       if (attribute_name == vmSymbols::tag_signature()) {
 953         if (attribute_length != 2) {
 954           classfile_parse_error(
 955             "Wrong size %u for field's Signature attribute in class file %s",
 956             attribute_length, CHECK);
 957         }
 958         generic_signature_index = cfs->get_u2(CHECK);
 959       } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
 960         runtime_visible_annotations_length = attribute_length;
 961         runtime_visible_annotations = cfs->get_u1_buffer();
 962         assert(runtime_visible_annotations != NULL, "null visible annotations");
 963         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
 964       } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
 965         runtime_invisible_annotations_length = attribute_length;
 966         runtime_invisible_annotations = cfs->get_u1_buffer();
 967         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
 968         cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
 969       } else {
 970         cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
 971       }
 972     } else {
 973       cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
 974     }
 975   }
 976 
 977   *constantvalue_index_addr = constantvalue_index;
 978   *is_synthetic_addr = is_synthetic;
 979   *generic_signature_index_addr = generic_signature_index;
 980   *field_annotations = assemble_annotations(runtime_visible_annotations,
 981                                             runtime_visible_annotations_length,
 982                                             runtime_invisible_annotations,
 983                                             runtime_invisible_annotations_length,
 984                                             CHECK);
 985   return;
 986 }
 987 
 988 
 989 // Field allocation types. Used for computing field offsets.
 990 
 991 enum FieldAllocationType {
 992   STATIC_OOP,           // Oops
 993   STATIC_BYTE,          // Boolean, Byte, char
 994   STATIC_SHORT,         // shorts
 995   STATIC_WORD,          // ints
 996   STATIC_DOUBLE,        // aligned long or double
 997   NONSTATIC_OOP,
 998   NONSTATIC_BYTE,
 999   NONSTATIC_SHORT,
1000   NONSTATIC_WORD,
1001   NONSTATIC_DOUBLE,
1002   MAX_FIELD_ALLOCATION_TYPE,
1003   BAD_ALLOCATION_TYPE = -1
1004 };
1005 
1006 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1007   BAD_ALLOCATION_TYPE, // 0
1008   BAD_ALLOCATION_TYPE, // 1
1009   BAD_ALLOCATION_TYPE, // 2
1010   BAD_ALLOCATION_TYPE, // 3
1011   NONSTATIC_BYTE ,     // T_BOOLEAN  =  4,
1012   NONSTATIC_SHORT,     // T_CHAR     =  5,
1013   NONSTATIC_WORD,      // T_FLOAT    =  6,
1014   NONSTATIC_DOUBLE,    // T_DOUBLE   =  7,
1015   NONSTATIC_BYTE,      // T_BYTE     =  8,
1016   NONSTATIC_SHORT,     // T_SHORT    =  9,
1017   NONSTATIC_WORD,      // T_INT      = 10,
1018   NONSTATIC_DOUBLE,    // T_LONG     = 11,
1019   NONSTATIC_OOP,       // T_OBJECT   = 12,
1020   NONSTATIC_OOP,       // T_ARRAY    = 13,
1021   BAD_ALLOCATION_TYPE, // T_VOID     = 14,
1022   BAD_ALLOCATION_TYPE, // T_ADDRESS  = 15,
1023   BAD_ALLOCATION_TYPE, // T_NARROWOOP= 16,
1024   BAD_ALLOCATION_TYPE, // T_CONFLICT = 17,
1025   BAD_ALLOCATION_TYPE, // 0
1026   BAD_ALLOCATION_TYPE, // 1
1027   BAD_ALLOCATION_TYPE, // 2
1028   BAD_ALLOCATION_TYPE, // 3
1029   STATIC_BYTE ,        // T_BOOLEAN  =  4,
1030   STATIC_SHORT,        // T_CHAR     =  5,
1031   STATIC_WORD,          // T_FLOAT    =  6,
1032   STATIC_DOUBLE,       // T_DOUBLE   =  7,
1033   STATIC_BYTE,         // T_BYTE     =  8,
1034   STATIC_SHORT,        // T_SHORT    =  9,
1035   STATIC_WORD,         // T_INT      = 10,
1036   STATIC_DOUBLE,       // T_LONG     = 11,
1037   STATIC_OOP,          // T_OBJECT   = 12,
1038   STATIC_OOP,          // T_ARRAY    = 13,
1039   BAD_ALLOCATION_TYPE, // T_VOID     = 14,
1040   BAD_ALLOCATION_TYPE, // T_ADDRESS  = 15,
1041   BAD_ALLOCATION_TYPE, // T_NARROWOOP= 16,
1042   BAD_ALLOCATION_TYPE, // T_CONFLICT = 17,
1043 };
1044 
1045 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1046   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1047   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1048   assert(result != BAD_ALLOCATION_TYPE, "bad type");
1049   return result;
1050 }
1051 
1052 class FieldAllocationCount: public ResourceObj {
1053  public:
1054   u2 count[MAX_FIELD_ALLOCATION_TYPE];
1055 
1056   FieldAllocationCount() {
1057     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1058       count[i] = 0;
1059     }
1060   }
1061 
1062   FieldAllocationType update(bool is_static, BasicType type) {
1063     FieldAllocationType atype = basic_type_to_atype(is_static, type);
1064     // Make sure there is no overflow with injected fields.
1065     assert(count[atype] < 0xFFFF, "More than 65535 fields");
1066     count[atype]++;
1067     return atype;
1068   }
1069 };
1070 
1071 
1072 typeArrayHandle ClassFileParser::parse_fields(Symbol* class_name,
1073                                               constantPoolHandle cp, bool is_interface,
1074                                               FieldAllocationCount *fac,
1075                                               objArrayHandle* fields_annotations,
1076                                               u2* java_fields_count_ptr, TRAPS) {
1077   ClassFileStream* cfs = stream();
1078   typeArrayHandle nullHandle;
1079   cfs->guarantee_more(2, CHECK_(nullHandle));  // length
1080   u2 length = cfs->get_u2_fast();
1081   *java_fields_count_ptr = length;
1082 
1083   int num_injected = 0;
1084   InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
1085 
1086   // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index]
1087   typeArrayOop new_fields = oopFactory::new_permanent_shortArray((length + num_injected) * FieldInfo::field_slots, CHECK_(nullHandle));
1088   typeArrayHandle fields(THREAD, new_fields);
1089 
1090   typeArrayHandle field_annotations;
1091   for (int n = 0; n < length; n++) {
1092     cfs->guarantee_more(8, CHECK_(nullHandle));  // access_flags, name_index, descriptor_index, attributes_count
1093 
1094     AccessFlags access_flags;
1095     jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1096     verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle));
1097     access_flags.set_flags(flags);
1098 
1099     u2 name_index = cfs->get_u2_fast();
1100     int cp_size = cp->length();
1101     check_property(
1102       valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1103       "Invalid constant pool index %u for field name in class file %s",
1104       name_index, CHECK_(nullHandle));
1105     Symbol*  name = cp->symbol_at(name_index);
1106     verify_legal_field_name(name, CHECK_(nullHandle));
1107 
1108     u2 signature_index = cfs->get_u2_fast();
1109     check_property(
1110       valid_cp_range(signature_index, cp_size) &&
1111         cp->tag_at(signature_index).is_utf8(),
1112       "Invalid constant pool index %u for field signature in class file %s",
1113       signature_index, CHECK_(nullHandle));
1114     Symbol*  sig = cp->symbol_at(signature_index);
1115     verify_legal_field_signature(name, sig, CHECK_(nullHandle));
1116 
1117     u2 constantvalue_index = 0;
1118     bool is_synthetic = false;
1119     u2 generic_signature_index = 0;
1120     bool is_static = access_flags.is_static();
1121 
1122     u2 attributes_count = cfs->get_u2_fast();
1123     if (attributes_count > 0) {
1124       parse_field_attributes(cp, attributes_count, is_static, signature_index,
1125                              &constantvalue_index, &is_synthetic,
1126                              &generic_signature_index, &field_annotations,
1127                              CHECK_(nullHandle));
1128       if (field_annotations.not_null()) {
1129         if (fields_annotations->is_null()) {
1130           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1131           *fields_annotations = objArrayHandle(THREAD, md);
1132         }
1133         (*fields_annotations)->obj_at_put(n, field_annotations());
1134       }
1135       if (is_synthetic) {
1136         access_flags.set_is_synthetic();
1137       }
1138     }
1139 
1140     FieldInfo* field = FieldInfo::from_field_array(fields(), n);
1141     field->initialize(access_flags.as_short(),
1142                       name_index,
1143                       signature_index,
1144                       constantvalue_index,
1145                       generic_signature_index,
1146                       0);
1147 
1148     BasicType type = cp->basic_type_for_signature_at(signature_index);
1149 
1150     // Remember how many oops we encountered and compute allocation type
1151     FieldAllocationType atype = fac->update(is_static, type);
1152 
1153     // The correct offset is computed later (all oop fields will be located together)
1154     // We temporarily store the allocation type in the offset field
1155     field->set_offset(atype);
1156   }
1157 
1158   if (num_injected != 0) {
1159     int index = length;
1160     for (int n = 0; n < num_injected; n++) {
1161       // Check for duplicates
1162       if (injected[n].may_be_java) {
1163         Symbol* name      = injected[n].name();
1164         Symbol* signature = injected[n].signature();
1165         bool duplicate = false;
1166         for (int i = 0; i < length; i++) {
1167           FieldInfo* f = FieldInfo::from_field_array(fields(), i);
1168           if (name      == cp->symbol_at(f->name_index()) &&
1169               signature == cp->symbol_at(f->signature_index())) {
1170             // Symbol is desclared in Java so skip this one
1171             duplicate = true;
1172             break;
1173           }
1174         }
1175         if (duplicate) {
1176           // These will be removed from the field array at the end
1177           continue;
1178         }
1179       }
1180 
1181       // Injected field
1182       FieldInfo* field = FieldInfo::from_field_array(fields(), index);
1183       field->initialize(JVM_ACC_FIELD_INTERNAL,
1184                         injected[n].name_index,
1185                         injected[n].signature_index,
1186                         0,
1187                         0,
1188                         0);
1189 
1190       BasicType type = FieldType::basic_type(injected[n].signature());
1191 
1192       // Remember how many oops we encountered and compute allocation type
1193       FieldAllocationType atype = fac->update(false, type);
1194 
1195       // The correct offset is computed later (all oop fields will be located together)
1196       // We temporarily store the allocation type in the offset field
1197       field->set_offset(atype);
1198       index++;
1199     }
1200 
1201     if (index < length + num_injected) {
1202       // sometimes injected fields already exist in the Java source so
1203       // the fields array could be too long.  In that case trim the
1204       // fields array.
1205       new_fields = oopFactory::new_permanent_shortArray(index * FieldInfo::field_slots, CHECK_(nullHandle));
1206       for (int i = 0; i < index * FieldInfo::field_slots; i++) {
1207         new_fields->short_at_put(i, fields->short_at(i));
1208       }
1209       fields = new_fields;
1210     }
1211   }
1212 
1213   if (_need_verify && length > 1) {
1214     // Check duplicated fields
1215     ResourceMark rm(THREAD);
1216     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1217       THREAD, NameSigHash*, HASH_ROW_SIZE);
1218     initialize_hashtable(names_and_sigs);
1219     bool dup = false;
1220     {
1221       debug_only(No_Safepoint_Verifier nsv;)
1222       for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
1223         Symbol* name = fs.name();
1224         Symbol* sig = fs.signature();
1225         // If no duplicates, add name/signature in hashtable names_and_sigs.
1226         if (!put_after_lookup(name, sig, names_and_sigs)) {
1227           dup = true;
1228           break;
1229         }
1230       }
1231     }
1232     if (dup) {
1233       classfile_parse_error("Duplicate field name&signature in class file %s",
1234                             CHECK_(nullHandle));
1235     }
1236   }
1237 
1238   return fields;
1239 }
1240 
1241 
1242 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1243   while (length-- > 0) {
1244     *dest++ = Bytes::get_Java_u2((u1*) (src++));
1245   }
1246 }
1247 
1248 
1249 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length,
1250                                                        u4 exception_table_length,
1251                                                        constantPoolHandle cp,
1252                                                        TRAPS) {
1253   ClassFileStream* cfs = stream();
1254   typeArrayHandle nullHandle;
1255 
1256   // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index]
1257   typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle));
1258   typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh);
1259 
1260   int index = 0;
1261   cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index
1262   for (unsigned int i = 0; i < exception_table_length; i++) {
1263     u2 start_pc = cfs->get_u2_fast();
1264     u2 end_pc = cfs->get_u2_fast();
1265     u2 handler_pc = cfs->get_u2_fast();
1266     u2 catch_type_index = cfs->get_u2_fast();
1267     // Will check legal target after parsing code array in verifier.
1268     if (_need_verify) {
1269       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1270                          "Illegal exception table range in class file %s", CHECK_(nullHandle));
1271       guarantee_property(handler_pc < code_length,
1272                          "Illegal exception table handler in class file %s", CHECK_(nullHandle));
1273       if (catch_type_index != 0) {
1274         guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1275                            is_klass_reference(cp, catch_type_index),
1276                            "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle));
1277       }
1278     }
1279     exception_handlers->int_at_put(index++, start_pc);
1280     exception_handlers->int_at_put(index++, end_pc);
1281     exception_handlers->int_at_put(index++, handler_pc);
1282     exception_handlers->int_at_put(index++, catch_type_index);
1283   }
1284   return exception_handlers;
1285 }
1286 
1287 void ClassFileParser::parse_linenumber_table(
1288     u4 code_attribute_length, u4 code_length,
1289     CompressedLineNumberWriteStream** write_stream, TRAPS) {
1290   ClassFileStream* cfs = stream();
1291   unsigned int num_entries = cfs->get_u2(CHECK);
1292 
1293   // Each entry is a u2 start_pc, and a u2 line_number
1294   unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1295 
1296   // Verify line number attribute and table length
1297   check_property(
1298     code_attribute_length == sizeof(u2) + length_in_bytes,
1299     "LineNumberTable attribute has wrong length in class file %s", CHECK);
1300 
1301   cfs->guarantee_more(length_in_bytes, CHECK);
1302 
1303   if ((*write_stream) == NULL) {
1304     if (length_in_bytes > fixed_buffer_size) {
1305       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1306     } else {
1307       (*write_stream) = new CompressedLineNumberWriteStream(
1308         linenumbertable_buffer, fixed_buffer_size);
1309     }
1310   }
1311 
1312   while (num_entries-- > 0) {
1313     u2 bci  = cfs->get_u2_fast(); // start_pc
1314     u2 line = cfs->get_u2_fast(); // line_number
1315     guarantee_property(bci < code_length,
1316         "Invalid pc in LineNumberTable in class file %s", CHECK);
1317     (*write_stream)->write_pair(bci, line);
1318   }
1319 }
1320 
1321 
1322 // Class file LocalVariableTable elements.
1323 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1324  public:
1325   u2 start_bci;
1326   u2 length;
1327   u2 name_cp_index;
1328   u2 descriptor_cp_index;
1329   u2 slot;
1330 };
1331 
1332 
1333 class LVT_Hash: public CHeapObj {
1334  public:
1335   LocalVariableTableElement  *_elem;  // element
1336   LVT_Hash*                   _next;  // Next entry in hash table
1337 };
1338 
1339 unsigned int hash(LocalVariableTableElement *elem) {
1340   unsigned int raw_hash = elem->start_bci;
1341 
1342   raw_hash = elem->length        + raw_hash * 37;
1343   raw_hash = elem->name_cp_index + raw_hash * 37;
1344   raw_hash = elem->slot          + raw_hash * 37;
1345 
1346   return raw_hash % HASH_ROW_SIZE;
1347 }
1348 
1349 void initialize_hashtable(LVT_Hash** table) {
1350   for (int i = 0; i < HASH_ROW_SIZE; i++) {
1351     table[i] = NULL;
1352   }
1353 }
1354 
1355 void clear_hashtable(LVT_Hash** table) {
1356   for (int i = 0; i < HASH_ROW_SIZE; i++) {
1357     LVT_Hash* current = table[i];
1358     LVT_Hash* next;
1359     while (current != NULL) {
1360       next = current->_next;
1361       current->_next = NULL;
1362       delete(current);
1363       current = next;
1364     }
1365     table[i] = NULL;
1366   }
1367 }
1368 
1369 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1370   LVT_Hash* entry = table[index];
1371 
1372   /*
1373    * 3-tuple start_bci/length/slot has to be unique key,
1374    * so the following comparison seems to be redundant:
1375    *       && elem->name_cp_index == entry->_elem->name_cp_index
1376    */
1377   while (entry != NULL) {
1378     if (elem->start_bci           == entry->_elem->start_bci
1379      && elem->length              == entry->_elem->length
1380      && elem->name_cp_index       == entry->_elem->name_cp_index
1381      && elem->slot                == entry->_elem->slot
1382     ) {
1383       return entry;
1384     }
1385     entry = entry->_next;
1386   }
1387   return NULL;
1388 }
1389 
1390 // Return false if the local variable is found in table.
1391 // Return true if no duplicate is found.
1392 // And local variable is added as a new entry in table.
1393 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1394   // First lookup for duplicates
1395   int index = hash(elem);
1396   LVT_Hash* entry = LVT_lookup(elem, index, table);
1397 
1398   if (entry != NULL) {
1399       return false;
1400   }
1401   // No duplicate is found, allocate a new entry and fill it.
1402   if ((entry = new LVT_Hash()) == NULL) {
1403     return false;
1404   }
1405   entry->_elem = elem;
1406 
1407   // Insert into hash table
1408   entry->_next = table[index];
1409   table[index] = entry;
1410 
1411   return true;
1412 }
1413 
1414 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1415   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
1416   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
1417   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1418   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1419   lvt->signature_cp_index  = 0;
1420   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
1421 }
1422 
1423 // Function is used to parse both attributes:
1424 //       LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1425 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1426                                                u2 max_locals,
1427                                                u4 code_attribute_length,
1428                                                constantPoolHandle cp,
1429                                                u2* localvariable_table_length,
1430                                                bool isLVTT,
1431                                                TRAPS) {
1432   ClassFileStream* cfs = stream();
1433   const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1434   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1435   unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1436   // Verify local variable table attribute has right length
1437   if (_need_verify) {
1438     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1439                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1440   }
1441   u2* localvariable_table_start = cfs->get_u2_buffer();
1442   assert(localvariable_table_start != NULL, "null local variable table");
1443   if (!_need_verify) {
1444     cfs->skip_u2_fast(size);
1445   } else {
1446     cfs->guarantee_more(size * 2, CHECK_NULL);
1447     for(int i = 0; i < (*localvariable_table_length); i++) {
1448       u2 start_pc = cfs->get_u2_fast();
1449       u2 length = cfs->get_u2_fast();
1450       u2 name_index = cfs->get_u2_fast();
1451       u2 descriptor_index = cfs->get_u2_fast();
1452       u2 index = cfs->get_u2_fast();
1453       // Assign to a u4 to avoid overflow
1454       u4 end_pc = (u4)start_pc + (u4)length;
1455 
1456       if (start_pc >= code_length) {
1457         classfile_parse_error(
1458           "Invalid start_pc %u in %s in class file %s",
1459           start_pc, tbl_name, CHECK_NULL);
1460       }
1461       if (end_pc > code_length) {
1462         classfile_parse_error(
1463           "Invalid length %u in %s in class file %s",
1464           length, tbl_name, CHECK_NULL);
1465       }
1466       int cp_size = cp->length();
1467       guarantee_property(
1468         valid_cp_range(name_index, cp_size) &&
1469           cp->tag_at(name_index).is_utf8(),
1470         "Name index %u in %s has bad constant type in class file %s",
1471         name_index, tbl_name, CHECK_NULL);
1472       guarantee_property(
1473         valid_cp_range(descriptor_index, cp_size) &&
1474           cp->tag_at(descriptor_index).is_utf8(),
1475         "Signature index %u in %s has bad constant type in class file %s",
1476         descriptor_index, tbl_name, CHECK_NULL);
1477 
1478       Symbol*  name = cp->symbol_at(name_index);
1479       Symbol*  sig = cp->symbol_at(descriptor_index);
1480       verify_legal_field_name(name, CHECK_NULL);
1481       u2 extra_slot = 0;
1482       if (!isLVTT) {
1483         verify_legal_field_signature(name, sig, CHECK_NULL);
1484 
1485         // 4894874: check special cases for double and long local variables
1486         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1487             sig == vmSymbols::type_signature(T_LONG)) {
1488           extra_slot = 1;
1489         }
1490       }
1491       guarantee_property((index + extra_slot) < max_locals,
1492                           "Invalid index %u in %s in class file %s",
1493                           index, tbl_name, CHECK_NULL);
1494     }
1495   }
1496   return localvariable_table_start;
1497 }
1498 
1499 
1500 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1501                                       u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1502   ClassFileStream* cfs = stream();
1503   u2 index = 0; // index in the array with long/double occupying two slots
1504   u4 i1 = *u1_index;
1505   u4 i2 = *u2_index + 1;
1506   for(int i = 0; i < array_length; i++) {
1507     u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1508     index++;
1509     if (tag == ITEM_Long || tag == ITEM_Double) {
1510       index++;
1511     } else if (tag == ITEM_Object) {
1512       u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1513       guarantee_property(valid_cp_range(class_index, cp->length()) &&
1514                          is_klass_reference(cp, class_index),
1515                          "Bad class index %u in StackMap in class file %s",
1516                          class_index, CHECK);
1517     } else if (tag == ITEM_Uninitialized) {
1518       u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1519       guarantee_property(
1520         offset < code_length,
1521         "Bad uninitialized type offset %u in StackMap in class file %s",
1522         offset, CHECK);
1523     } else {
1524       guarantee_property(
1525         tag <= (u1)ITEM_Uninitialized,
1526         "Unknown variable type %u in StackMap in class file %s",
1527         tag, CHECK);
1528     }
1529   }
1530   u2_array[*u2_index] = index;
1531   *u1_index = i1;
1532   *u2_index = i2;
1533 }
1534 
1535 typeArrayOop ClassFileParser::parse_stackmap_table(
1536     u4 code_attribute_length, TRAPS) {
1537   if (code_attribute_length == 0)
1538     return NULL;
1539 
1540   ClassFileStream* cfs = stream();
1541   u1* stackmap_table_start = cfs->get_u1_buffer();
1542   assert(stackmap_table_start != NULL, "null stackmap table");
1543 
1544   // check code_attribute_length first
1545   stream()->skip_u1(code_attribute_length, CHECK_NULL);
1546 
1547   if (!_need_verify && !DumpSharedSpaces) {
1548     return NULL;
1549   }
1550 
1551   typeArrayOop stackmap_data =
1552     oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
1553 
1554   stackmap_data->set_length(code_attribute_length);
1555   memcpy((void*)stackmap_data->byte_at_addr(0),
1556          (void*)stackmap_table_start, code_attribute_length);
1557   return stackmap_data;
1558 }
1559 
1560 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1561                                               u4 method_attribute_length,
1562                                               constantPoolHandle cp, TRAPS) {
1563   ClassFileStream* cfs = stream();
1564   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
1565   *checked_exceptions_length = cfs->get_u2_fast();
1566   unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1567   u2* checked_exceptions_start = cfs->get_u2_buffer();
1568   assert(checked_exceptions_start != NULL, "null checked exceptions");
1569   if (!_need_verify) {
1570     cfs->skip_u2_fast(size);
1571   } else {
1572     // Verify each value in the checked exception table
1573     u2 checked_exception;
1574     u2 len = *checked_exceptions_length;
1575     cfs->guarantee_more(2 * len, CHECK_NULL);
1576     for (int i = 0; i < len; i++) {
1577       checked_exception = cfs->get_u2_fast();
1578       check_property(
1579         valid_cp_range(checked_exception, cp->length()) &&
1580         is_klass_reference(cp, checked_exception),
1581         "Exception name has bad type at constant pool %u in class file %s",
1582         checked_exception, CHECK_NULL);
1583     }
1584   }
1585   // check exceptions attribute length
1586   if (_need_verify) {
1587     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1588                                                    sizeof(u2) * size),
1589                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1590   }
1591   return checked_exceptions_start;
1592 }
1593 
1594 void ClassFileParser::throwIllegalSignature(
1595     const char* type, Symbol* name, Symbol* sig, TRAPS) {
1596   ResourceMark rm(THREAD);
1597   Exceptions::fthrow(THREAD_AND_LOCATION,
1598       vmSymbols::java_lang_ClassFormatError(),
1599       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1600       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1601 }
1602 
1603 #define MAX_ARGS_SIZE 255
1604 #define MAX_CODE_SIZE 65535
1605 #define INITIAL_MAX_LVT_NUMBER 256
1606 
1607 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1608 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the
1609 // methodOop to save footprint, so we only know the size of the resulting methodOop when the
1610 // entire method attribute is parsed.
1611 //
1612 // The promoted_flags parameter is used to pass relevant access_flags
1613 // from the method back up to the containing klass. These flag values
1614 // are added to klass's access_flags.
1615 
1616 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface,
1617                                            AccessFlags *promoted_flags,
1618                                            typeArrayHandle* method_annotations,
1619                                            typeArrayHandle* method_parameter_annotations,
1620                                            typeArrayHandle* method_default_annotations,
1621                                            TRAPS) {
1622   ClassFileStream* cfs = stream();
1623   methodHandle nullHandle;
1624   ResourceMark rm(THREAD);
1625   // Parse fixed parts
1626   cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1627 
1628   int flags = cfs->get_u2_fast();
1629   u2 name_index = cfs->get_u2_fast();
1630   int cp_size = cp->length();
1631   check_property(
1632     valid_cp_range(name_index, cp_size) &&
1633       cp->tag_at(name_index).is_utf8(),
1634     "Illegal constant pool index %u for method name in class file %s",
1635     name_index, CHECK_(nullHandle));
1636   Symbol*  name = cp->symbol_at(name_index);
1637   verify_legal_method_name(name, CHECK_(nullHandle));
1638 
1639   u2 signature_index = cfs->get_u2_fast();
1640   guarantee_property(
1641     valid_cp_range(signature_index, cp_size) &&
1642       cp->tag_at(signature_index).is_utf8(),
1643     "Illegal constant pool index %u for method signature in class file %s",
1644     signature_index, CHECK_(nullHandle));
1645   Symbol*  signature = cp->symbol_at(signature_index);
1646 
1647   AccessFlags access_flags;
1648   if (name == vmSymbols::class_initializer_name()) {
1649     // We ignore the other access flags for a valid class initializer.
1650     // (JVM Spec 2nd ed., chapter 4.6)
1651     if (_major_version < 51) { // backward compatibility
1652       flags = JVM_ACC_STATIC;
1653     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1654       flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1655     }
1656   } else {
1657     verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1658   }
1659 
1660   int args_size = -1;  // only used when _need_verify is true
1661   if (_need_verify) {
1662     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1663                  verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1664     if (args_size > MAX_ARGS_SIZE) {
1665       classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1666     }
1667   }
1668 
1669   access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1670 
1671   // Default values for code and exceptions attribute elements
1672   u2 max_stack = 0;
1673   u2 max_locals = 0;
1674   u4 code_length = 0;
1675   u1* code_start = 0;
1676   u2 exception_table_length = 0;
1677   typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1678   u2 checked_exceptions_length = 0;
1679   u2* checked_exceptions_start = NULL;
1680   CompressedLineNumberWriteStream* linenumber_table = NULL;
1681   int linenumber_table_length = 0;
1682   int total_lvt_length = 0;
1683   u2 lvt_cnt = 0;
1684   u2 lvtt_cnt = 0;
1685   bool lvt_allocated = false;
1686   u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1687   u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1688   u2* localvariable_table_length;
1689   u2** localvariable_table_start;
1690   u2* localvariable_type_table_length;
1691   u2** localvariable_type_table_start;
1692   bool parsed_code_attribute = false;
1693   bool parsed_checked_exceptions_attribute = false;
1694   bool parsed_stackmap_attribute = false;
1695   // stackmap attribute - JDK1.5
1696   typeArrayHandle stackmap_data;
1697   u2 generic_signature_index = 0;
1698   u1* runtime_visible_annotations = NULL;
1699   int runtime_visible_annotations_length = 0;
1700   u1* runtime_invisible_annotations = NULL;
1701   int runtime_invisible_annotations_length = 0;
1702   u1* runtime_visible_parameter_annotations = NULL;
1703   int runtime_visible_parameter_annotations_length = 0;
1704   u1* runtime_invisible_parameter_annotations = NULL;
1705   int runtime_invisible_parameter_annotations_length = 0;
1706   u1* annotation_default = NULL;
1707   int annotation_default_length = 0;
1708 
1709   // Parse code and exceptions attribute
1710   u2 method_attributes_count = cfs->get_u2_fast();
1711   while (method_attributes_count--) {
1712     cfs->guarantee_more(6, CHECK_(nullHandle));  // method_attribute_name_index, method_attribute_length
1713     u2 method_attribute_name_index = cfs->get_u2_fast();
1714     u4 method_attribute_length = cfs->get_u4_fast();
1715     check_property(
1716       valid_cp_range(method_attribute_name_index, cp_size) &&
1717         cp->tag_at(method_attribute_name_index).is_utf8(),
1718       "Invalid method attribute name index %u in class file %s",
1719       method_attribute_name_index, CHECK_(nullHandle));
1720 
1721     Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1722     if (method_attribute_name == vmSymbols::tag_code()) {
1723       // Parse Code attribute
1724       if (_need_verify) {
1725         guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1726                         "Code attribute in native or abstract methods in class file %s",
1727                          CHECK_(nullHandle));
1728       }
1729       if (parsed_code_attribute) {
1730         classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1731       }
1732       parsed_code_attribute = true;
1733 
1734       // Stack size, locals size, and code size
1735       if (_major_version == 45 && _minor_version <= 2) {
1736         cfs->guarantee_more(4, CHECK_(nullHandle));
1737         max_stack = cfs->get_u1_fast();
1738         max_locals = cfs->get_u1_fast();
1739         code_length = cfs->get_u2_fast();
1740       } else {
1741         cfs->guarantee_more(8, CHECK_(nullHandle));
1742         max_stack = cfs->get_u2_fast();
1743         max_locals = cfs->get_u2_fast();
1744         code_length = cfs->get_u4_fast();
1745       }
1746       if (_need_verify) {
1747         guarantee_property(args_size <= max_locals,
1748                            "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1749         guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1750                            "Invalid method Code length %u in class file %s",
1751                            code_length, CHECK_(nullHandle));
1752       }
1753       // Code pointer
1754       code_start = cfs->get_u1_buffer();
1755       assert(code_start != NULL, "null code start");
1756       cfs->guarantee_more(code_length, CHECK_(nullHandle));
1757       cfs->skip_u1_fast(code_length);
1758 
1759       // Exception handler table
1760       cfs->guarantee_more(2, CHECK_(nullHandle));  // exception_table_length
1761       exception_table_length = cfs->get_u2_fast();
1762       if (exception_table_length > 0) {
1763         exception_handlers =
1764               parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle));
1765       }
1766 
1767       // Parse additional attributes in code attribute
1768       cfs->guarantee_more(2, CHECK_(nullHandle));  // code_attributes_count
1769       u2 code_attributes_count = cfs->get_u2_fast();
1770 
1771       unsigned int calculated_attribute_length = 0;
1772 
1773       if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1774         calculated_attribute_length =
1775             sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1776       } else {
1777         // max_stack, locals and length are smaller in pre-version 45.2 classes
1778         calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1779       }
1780       calculated_attribute_length +=
1781         code_length +
1782         sizeof(exception_table_length) +
1783         sizeof(code_attributes_count) +
1784         exception_table_length *
1785             ( sizeof(u2) +   // start_pc
1786               sizeof(u2) +   // end_pc
1787               sizeof(u2) +   // handler_pc
1788               sizeof(u2) );  // catch_type_index
1789 
1790       while (code_attributes_count--) {
1791         cfs->guarantee_more(6, CHECK_(nullHandle));  // code_attribute_name_index, code_attribute_length
1792         u2 code_attribute_name_index = cfs->get_u2_fast();
1793         u4 code_attribute_length = cfs->get_u4_fast();
1794         calculated_attribute_length += code_attribute_length +
1795                                        sizeof(code_attribute_name_index) +
1796                                        sizeof(code_attribute_length);
1797         check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
1798                        cp->tag_at(code_attribute_name_index).is_utf8(),
1799                        "Invalid code attribute name index %u in class file %s",
1800                        code_attribute_name_index,
1801                        CHECK_(nullHandle));
1802         if (LoadLineNumberTables &&
1803             cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
1804           // Parse and compress line number table
1805           parse_linenumber_table(code_attribute_length, code_length,
1806             &linenumber_table, CHECK_(nullHandle));
1807 
1808         } else if (LoadLocalVariableTables &&
1809                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
1810           // Parse local variable table
1811           if (!lvt_allocated) {
1812             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1813               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
1814             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1815               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1816             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1817               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
1818             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1819               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1820             lvt_allocated = true;
1821           }
1822           if (lvt_cnt == max_lvt_cnt) {
1823             max_lvt_cnt <<= 1;
1824             REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
1825             REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
1826           }
1827           localvariable_table_start[lvt_cnt] =
1828             parse_localvariable_table(code_length,
1829                                       max_locals,
1830                                       code_attribute_length,
1831                                       cp,
1832                                       &localvariable_table_length[lvt_cnt],
1833                                       false,    // is not LVTT
1834                                       CHECK_(nullHandle));
1835           total_lvt_length += localvariable_table_length[lvt_cnt];
1836           lvt_cnt++;
1837         } else if (LoadLocalVariableTypeTables &&
1838                    _major_version >= JAVA_1_5_VERSION &&
1839                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
1840           if (!lvt_allocated) {
1841             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1842               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
1843             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1844               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1845             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1846               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
1847             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1848               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1849             lvt_allocated = true;
1850           }
1851           // Parse local variable type table
1852           if (lvtt_cnt == max_lvtt_cnt) {
1853             max_lvtt_cnt <<= 1;
1854             REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
1855             REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
1856           }
1857           localvariable_type_table_start[lvtt_cnt] =
1858             parse_localvariable_table(code_length,
1859                                       max_locals,
1860                                       code_attribute_length,
1861                                       cp,
1862                                       &localvariable_type_table_length[lvtt_cnt],
1863                                       true,     // is LVTT
1864                                       CHECK_(nullHandle));
1865           lvtt_cnt++;
1866         } else if (UseSplitVerifier &&
1867                    _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
1868                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
1869           // Stack map is only needed by the new verifier in JDK1.5.
1870           if (parsed_stackmap_attribute) {
1871             classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
1872           }
1873           typeArrayOop sm =
1874             parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
1875           stackmap_data = typeArrayHandle(THREAD, sm);
1876           parsed_stackmap_attribute = true;
1877         } else {
1878           // Skip unknown attributes
1879           cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
1880         }
1881       }
1882       // check method attribute length
1883       if (_need_verify) {
1884         guarantee_property(method_attribute_length == calculated_attribute_length,
1885                            "Code segment has wrong length in class file %s", CHECK_(nullHandle));
1886       }
1887     } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
1888       // Parse Exceptions attribute
1889       if (parsed_checked_exceptions_attribute) {
1890         classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
1891       }
1892       parsed_checked_exceptions_attribute = true;
1893       checked_exceptions_start =
1894             parse_checked_exceptions(&checked_exceptions_length,
1895                                      method_attribute_length,
1896                                      cp, CHECK_(nullHandle));
1897     } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
1898       if (method_attribute_length != 0) {
1899         classfile_parse_error(
1900           "Invalid Synthetic method attribute length %u in class file %s",
1901           method_attribute_length, CHECK_(nullHandle));
1902       }
1903       // Should we check that there hasn't already been a synthetic attribute?
1904       access_flags.set_is_synthetic();
1905     } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1906       if (method_attribute_length != 0) {
1907         classfile_parse_error(
1908           "Invalid Deprecated method attribute length %u in class file %s",
1909           method_attribute_length, CHECK_(nullHandle));
1910       }
1911     } else if (_major_version >= JAVA_1_5_VERSION) {
1912       if (method_attribute_name == vmSymbols::tag_signature()) {
1913         if (method_attribute_length != 2) {
1914           classfile_parse_error(
1915             "Invalid Signature attribute length %u in class file %s",
1916             method_attribute_length, CHECK_(nullHandle));
1917         }
1918         cfs->guarantee_more(2, CHECK_(nullHandle));  // generic_signature_index
1919         generic_signature_index = cfs->get_u2_fast();
1920       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1921         runtime_visible_annotations_length = method_attribute_length;
1922         runtime_visible_annotations = cfs->get_u1_buffer();
1923         assert(runtime_visible_annotations != NULL, "null visible annotations");
1924         cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
1925       } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1926         runtime_invisible_annotations_length = method_attribute_length;
1927         runtime_invisible_annotations = cfs->get_u1_buffer();
1928         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1929         cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
1930       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
1931         runtime_visible_parameter_annotations_length = method_attribute_length;
1932         runtime_visible_parameter_annotations = cfs->get_u1_buffer();
1933         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
1934         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
1935       } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
1936         runtime_invisible_parameter_annotations_length = method_attribute_length;
1937         runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
1938         assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
1939         cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
1940       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
1941         annotation_default_length = method_attribute_length;
1942         annotation_default = cfs->get_u1_buffer();
1943         assert(annotation_default != NULL, "null annotation default");
1944         cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
1945       } else {
1946         // Skip unknown attributes
1947         cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1948       }
1949     } else {
1950       // Skip unknown attributes
1951       cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1952     }
1953   }
1954 
1955   if (linenumber_table != NULL) {
1956     linenumber_table->write_terminator();
1957     linenumber_table_length = linenumber_table->position();
1958   }
1959 
1960   // Make sure there's at least one Code attribute in non-native/non-abstract method
1961   if (_need_verify) {
1962     guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
1963                       "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
1964   }
1965 
1966   // All sizing information for a methodOop is finally available, now create it
1967   methodOop m_oop  = oopFactory::new_method(code_length, access_flags, linenumber_table_length,
1968                                             total_lvt_length, checked_exceptions_length,
1969                                             oopDesc::IsSafeConc, CHECK_(nullHandle));
1970   methodHandle m (THREAD, m_oop);
1971 
1972   ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize);
1973 
1974   // Fill in information from fixed part (access_flags already set)
1975   m->set_constants(cp());
1976   m->set_name_index(name_index);
1977   m->set_signature_index(signature_index);
1978   m->set_generic_signature_index(generic_signature_index);
1979 #ifdef CC_INTERP
1980   // hmm is there a gc issue here??
1981   ResultTypeFinder rtf(cp->symbol_at(signature_index));
1982   m->set_result_index(rtf.type());
1983 #endif
1984 
1985   if (args_size >= 0) {
1986     m->set_size_of_parameters(args_size);
1987   } else {
1988     m->compute_size_of_parameters(THREAD);
1989   }
1990 #ifdef ASSERT
1991   if (args_size >= 0) {
1992     m->compute_size_of_parameters(THREAD);
1993     assert(args_size == m->size_of_parameters(), "");
1994   }
1995 #endif
1996 
1997   // Fill in code attribute information
1998   m->set_max_stack(max_stack);
1999   m->set_max_locals(max_locals);
2000   m->constMethod()->set_stackmap_data(stackmap_data());
2001 
2002   /**
2003    * The exception_table field is the flag used to indicate
2004    * that the methodOop and it's associated constMethodOop are partially
2005    * initialized and thus are exempt from pre/post GC verification.  Once
2006    * the field is set, the oops are considered fully initialized so make
2007    * sure that the oops can pass verification when this field is set.
2008    */
2009   m->set_exception_table(exception_handlers());
2010 
2011   // Copy byte codes
2012   m->set_code(code_start);
2013 
2014   // Copy line number table
2015   if (linenumber_table != NULL) {
2016     memcpy(m->compressed_linenumber_table(),
2017            linenumber_table->buffer(), linenumber_table_length);
2018   }
2019 
2020   // Copy checked exceptions
2021   if (checked_exceptions_length > 0) {
2022     int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2023     copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2024   }
2025 
2026   /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2027    *
2028    * Rules for LVT's and LVTT's are:
2029    *   - There can be any number of LVT's and LVTT's.
2030    *   - If there are n LVT's, it is the same as if there was just
2031    *     one LVT containing all the entries from the n LVT's.
2032    *   - There may be no more than one LVT entry per local variable.
2033    *     Two LVT entries are 'equal' if these fields are the same:
2034    *        start_pc, length, name, slot
2035    *   - There may be no more than one LVTT entry per each LVT entry.
2036    *     Each LVTT entry has to match some LVT entry.
2037    *   - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2038    */
2039   if (total_lvt_length > 0) {
2040     int tbl_no, idx;
2041 
2042     promoted_flags->set_has_localvariable_table();
2043 
2044     LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2045     initialize_hashtable(lvt_Hash);
2046 
2047     // To fill LocalVariableTable in
2048     Classfile_LVT_Element*  cf_lvt;
2049     LocalVariableTableElement* lvt = m->localvariable_table_start();
2050 
2051     for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2052       cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2053       for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2054         copy_lvt_element(&cf_lvt[idx], lvt);
2055         // If no duplicates, add LVT elem in hashtable lvt_Hash.
2056         if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2057           && _need_verify
2058           && _major_version >= JAVA_1_5_VERSION ) {
2059           clear_hashtable(lvt_Hash);
2060           classfile_parse_error("Duplicated LocalVariableTable attribute "
2061                                 "entry for '%s' in class file %s",
2062                                  cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2063                                  CHECK_(nullHandle));
2064         }
2065       }
2066     }
2067 
2068     // To merge LocalVariableTable and LocalVariableTypeTable
2069     Classfile_LVT_Element* cf_lvtt;
2070     LocalVariableTableElement lvtt_elem;
2071 
2072     for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2073       cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2074       for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2075         copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2076         int index = hash(&lvtt_elem);
2077         LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2078         if (entry == NULL) {
2079           if (_need_verify) {
2080             clear_hashtable(lvt_Hash);
2081             classfile_parse_error("LVTT entry for '%s' in class file %s "
2082                                   "does not match any LVT entry",
2083                                    cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2084                                    CHECK_(nullHandle));
2085           }
2086         } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2087           clear_hashtable(lvt_Hash);
2088           classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2089                                 "entry for '%s' in class file %s",
2090                                  cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2091                                  CHECK_(nullHandle));
2092         } else {
2093           // to add generic signatures into LocalVariableTable
2094           entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2095         }
2096       }
2097     }
2098     clear_hashtable(lvt_Hash);
2099   }
2100 
2101   *method_annotations = assemble_annotations(runtime_visible_annotations,
2102                                              runtime_visible_annotations_length,
2103                                              runtime_invisible_annotations,
2104                                              runtime_invisible_annotations_length,
2105                                              CHECK_(nullHandle));
2106   *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
2107                                                        runtime_visible_parameter_annotations_length,
2108                                                        runtime_invisible_parameter_annotations,
2109                                                        runtime_invisible_parameter_annotations_length,
2110                                                        CHECK_(nullHandle));
2111   *method_default_annotations = assemble_annotations(annotation_default,
2112                                                      annotation_default_length,
2113                                                      NULL,
2114                                                      0,
2115                                                      CHECK_(nullHandle));
2116 
2117   if (name == vmSymbols::finalize_method_name() &&
2118       signature == vmSymbols::void_method_signature()) {
2119     if (m->is_empty_method()) {
2120       _has_empty_finalizer = true;
2121     } else {
2122       _has_finalizer = true;
2123     }
2124   }
2125   if (name == vmSymbols::object_initializer_name() &&
2126       signature == vmSymbols::void_method_signature() &&
2127       m->is_vanilla_constructor()) {
2128     _has_vanilla_constructor = true;
2129   }
2130 
2131   if (EnableInvokeDynamic && (m->is_method_handle_invoke() ||
2132                               m->is_method_handle_adapter())) {
2133     THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
2134                "Method handle invokers must be defined internally to the VM", nullHandle);
2135   }
2136 
2137   return m;
2138 }
2139 
2140 
2141 // The promoted_flags parameter is used to pass relevant access_flags
2142 // from the methods back up to the containing klass. These flag values
2143 // are added to klass's access_flags.
2144 
2145 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
2146                                               AccessFlags* promoted_flags,
2147                                               bool* has_final_method,
2148                                               objArrayOop* methods_annotations_oop,
2149                                               objArrayOop* methods_parameter_annotations_oop,
2150                                               objArrayOop* methods_default_annotations_oop,
2151                                               TRAPS) {
2152   ClassFileStream* cfs = stream();
2153   objArrayHandle nullHandle;
2154   typeArrayHandle method_annotations;
2155   typeArrayHandle method_parameter_annotations;
2156   typeArrayHandle method_default_annotations;
2157   cfs->guarantee_more(2, CHECK_(nullHandle));  // length
2158   u2 length = cfs->get_u2_fast();
2159   if (length == 0) {
2160     return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2161   } else {
2162     objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2163     objArrayHandle methods(THREAD, m);
2164     HandleMark hm(THREAD);
2165     objArrayHandle methods_annotations;
2166     objArrayHandle methods_parameter_annotations;
2167     objArrayHandle methods_default_annotations;
2168     for (int index = 0; index < length; index++) {
2169       methodHandle method = parse_method(cp, is_interface,
2170                                          promoted_flags,
2171                                          &method_annotations,
2172                                          &method_parameter_annotations,
2173                                          &method_default_annotations,
2174                                          CHECK_(nullHandle));
2175       if (method->is_final()) {
2176         *has_final_method = true;
2177       }
2178       methods->obj_at_put(index, method());
2179       if (method_annotations.not_null()) {
2180         if (methods_annotations.is_null()) {
2181           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2182           methods_annotations = objArrayHandle(THREAD, md);
2183         }
2184         methods_annotations->obj_at_put(index, method_annotations());
2185       }
2186       if (method_parameter_annotations.not_null()) {
2187         if (methods_parameter_annotations.is_null()) {
2188           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2189           methods_parameter_annotations = objArrayHandle(THREAD, md);
2190         }
2191         methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
2192       }
2193       if (method_default_annotations.not_null()) {
2194         if (methods_default_annotations.is_null()) {
2195           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2196           methods_default_annotations = objArrayHandle(THREAD, md);
2197         }
2198         methods_default_annotations->obj_at_put(index, method_default_annotations());
2199       }
2200     }
2201     if (_need_verify && length > 1) {
2202       // Check duplicated methods
2203       ResourceMark rm(THREAD);
2204       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2205         THREAD, NameSigHash*, HASH_ROW_SIZE);
2206       initialize_hashtable(names_and_sigs);
2207       bool dup = false;
2208       {
2209         debug_only(No_Safepoint_Verifier nsv;)
2210         for (int i = 0; i < length; i++) {
2211           methodOop m = (methodOop)methods->obj_at(i);
2212           // If no duplicates, add name/signature in hashtable names_and_sigs.
2213           if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2214             dup = true;
2215             break;
2216           }
2217         }
2218       }
2219       if (dup) {
2220         classfile_parse_error("Duplicate method name&signature in class file %s",
2221                               CHECK_(nullHandle));
2222       }
2223     }
2224 
2225     *methods_annotations_oop = methods_annotations();
2226     *methods_parameter_annotations_oop = methods_parameter_annotations();
2227     *methods_default_annotations_oop = methods_default_annotations();
2228 
2229     return methods;
2230   }
2231 }
2232 
2233 
2234 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
2235                                               objArrayHandle methods_annotations,
2236                                               objArrayHandle methods_parameter_annotations,
2237                                               objArrayHandle methods_default_annotations,
2238                                               TRAPS) {
2239   typeArrayHandle nullHandle;
2240   int length = methods()->length();
2241   // If JVMTI original method ordering or sharing is enabled we have to
2242   // remember the original class file ordering.
2243   // We temporarily use the vtable_index field in the methodOop to store the
2244   // class file index, so we can read in after calling qsort.
2245   // Put the method ordering in the shared archive.
2246   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2247     for (int index = 0; index < length; index++) {
2248       methodOop m = methodOop(methods->obj_at(index));
2249       assert(!m->valid_vtable_index(), "vtable index should not be set");
2250       m->set_vtable_index(index);
2251     }
2252   }
2253   // Sort method array by ascending method name (for faster lookups & vtable construction)
2254   // Note that the ordering is not alphabetical, see Symbol::fast_compare
2255   methodOopDesc::sort_methods(methods(),
2256                               methods_annotations(),
2257                               methods_parameter_annotations(),
2258                               methods_default_annotations());
2259 
2260   // If JVMTI original method ordering or sharing is enabled construct int
2261   // array remembering the original ordering
2262   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2263     typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
2264     typeArrayHandle method_ordering(THREAD, new_ordering);
2265     for (int index = 0; index < length; index++) {
2266       methodOop m = methodOop(methods->obj_at(index));
2267       int old_index = m->vtable_index();
2268       assert(old_index >= 0 && old_index < length, "invalid method index");
2269       method_ordering->int_at_put(index, old_index);
2270       m->set_vtable_index(methodOopDesc::invalid_vtable_index);
2271     }
2272     return method_ordering;
2273   } else {
2274     return typeArrayHandle(THREAD, Universe::the_empty_int_array());
2275   }
2276 }
2277 
2278 
2279 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2280   ClassFileStream* cfs = stream();
2281   cfs->guarantee_more(2, CHECK);  // sourcefile_index
2282   u2 sourcefile_index = cfs->get_u2_fast();
2283   check_property(
2284     valid_cp_range(sourcefile_index, cp->length()) &&
2285       cp->tag_at(sourcefile_index).is_utf8(),
2286     "Invalid SourceFile attribute at constant pool index %u in class file %s",
2287     sourcefile_index, CHECK);
2288   k->set_source_file_name(cp->symbol_at(sourcefile_index));
2289 }
2290 
2291 
2292 
2293 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2294                                                                        instanceKlassHandle k,
2295                                                                        int length, TRAPS) {
2296   ClassFileStream* cfs = stream();
2297   u1* sde_buffer = cfs->get_u1_buffer();
2298   assert(sde_buffer != NULL, "null sde buffer");
2299 
2300   // Don't bother storing it if there is no way to retrieve it
2301   if (JvmtiExport::can_get_source_debug_extension()) {
2302     // Optimistically assume that only 1 byte UTF format is used
2303     // (common case)
2304     TempNewSymbol sde_symbol = SymbolTable::new_symbol((const char*)sde_buffer, length, CHECK);
2305     k->set_source_debug_extension(sde_symbol);
2306     // Note that set_source_debug_extension() increments the reference count
2307     // for its copy of the Symbol*, so use a TempNewSymbol here.
2308   }
2309   // Got utf8 string, set stream position forward
2310   cfs->skip_u1(length, CHECK);
2311 }
2312 
2313 
2314 // Inner classes can be static, private or protected (classic VM does this)
2315 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2316 
2317 // Return number of classes in the inner classes attribute table
2318 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {





2319   ClassFileStream* cfs = stream();




2320   cfs->guarantee_more(2, CHECK_0);  // length
2321   u2 length = cfs->get_u2_fast();

2322 
2323   // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags]
2324   typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0);









2325   typeArrayHandle inner_classes(THREAD, ic);
2326   int index = 0;
2327   int cp_size = cp->length();
2328   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
2329   for (int n = 0; n < length; n++) {
2330     // Inner class index
2331     u2 inner_class_info_index = cfs->get_u2_fast();
2332     check_property(
2333       inner_class_info_index == 0 ||
2334         (valid_cp_range(inner_class_info_index, cp_size) &&
2335         is_klass_reference(cp, inner_class_info_index)),
2336       "inner_class_info_index %u has bad constant type in class file %s",
2337       inner_class_info_index, CHECK_0);
2338     // Outer class index
2339     u2 outer_class_info_index = cfs->get_u2_fast();
2340     check_property(
2341       outer_class_info_index == 0 ||
2342         (valid_cp_range(outer_class_info_index, cp_size) &&
2343         is_klass_reference(cp, outer_class_info_index)),
2344       "outer_class_info_index %u has bad constant type in class file %s",
2345       outer_class_info_index, CHECK_0);
2346     // Inner class name
2347     u2 inner_name_index = cfs->get_u2_fast();
2348     check_property(
2349       inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2350         cp->tag_at(inner_name_index).is_utf8()),
2351       "inner_name_index %u has bad constant type in class file %s",
2352       inner_name_index, CHECK_0);
2353     if (_need_verify) {
2354       guarantee_property(inner_class_info_index != outer_class_info_index,
2355                          "Class is both outer and inner class in class file %s", CHECK_0);
2356     }
2357     // Access flags
2358     AccessFlags inner_access_flags;
2359     jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2360     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2361       // Set abstract bit for old class files for backward compatibility
2362       flags |= JVM_ACC_ABSTRACT;
2363     }
2364     verify_legal_class_modifiers(flags, CHECK_0);
2365     inner_access_flags.set_flags(flags);
2366 
2367     inner_classes->short_at_put(index++, inner_class_info_index);
2368     inner_classes->short_at_put(index++, outer_class_info_index);
2369     inner_classes->short_at_put(index++, inner_name_index);
2370     inner_classes->short_at_put(index++, inner_access_flags.as_short());
2371   }
2372 
2373   // 4347400: make sure there's no duplicate entry in the classes array
2374   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2375     for(int i = 0; i < inner_classes->length(); i += 4) {
2376       for(int j = i + 4; j < inner_classes->length(); j += 4) {
2377         guarantee_property((inner_classes->ushort_at(i)   != inner_classes->ushort_at(j) ||
2378                             inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
2379                             inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
2380                             inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
2381                             "Duplicate entry in InnerClasses in class file %s",
2382                             CHECK_0);
2383       }
2384     }
2385   }
2386 






2387   // Update instanceKlass with inner class info.
2388   k->set_inner_classes(inner_classes());




2389   return length;
2390 }
2391 
2392 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2393   k->set_is_synthetic();
2394 }
2395 
2396 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2397   ClassFileStream* cfs = stream();
2398   u2 signature_index = cfs->get_u2(CHECK);
2399   check_property(
2400     valid_cp_range(signature_index, cp->length()) &&
2401       cp->tag_at(signature_index).is_utf8(),
2402     "Invalid constant pool index %u in Signature attribute in class file %s",
2403     signature_index, CHECK);
2404   k->set_generic_signature(cp->symbol_at(signature_index));
2405 }
2406 
2407 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k,
2408                                                                   u4 attribute_byte_length, TRAPS) {
2409   ClassFileStream* cfs = stream();
2410   u1* current_start = cfs->current();
2411 
2412   cfs->guarantee_more(2, CHECK);  // length
2413   int attribute_array_length = cfs->get_u2_fast();
2414 
2415   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2416                      "Short length on BootstrapMethods in class file %s",
2417                      CHECK);
2418 
2419   // The attribute contains a counted array of counted tuples of shorts,
2420   // represending bootstrap specifiers:
2421   //    length*{bootstrap_method_index, argument_count*{argument_index}}
2422   int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2423   // operand_count = number of shorts in attr, except for leading length
2424 
2425   // The attribute is copied into a short[] array.
2426   // The array begins with a series of short[2] pairs, one for each tuple.
2427   int index_size = (attribute_array_length * 2);
2428 
2429   typeArrayOop operands_oop = oopFactory::new_permanent_intArray(index_size + operand_count, CHECK);
2430   typeArrayHandle operands(THREAD, operands_oop);
2431   operands_oop = NULL; // tidy
2432 
2433   int operand_fill_index = index_size;
2434   int cp_size = cp->length();
2435 
2436   for (int n = 0; n < attribute_array_length; n++) {
2437     // Store a 32-bit offset into the header of the operand array.
2438     assert(constantPoolOopDesc::operand_offset_at(operands(), n) == 0, "");
2439     constantPoolOopDesc::operand_offset_at_put(operands(), n, operand_fill_index);
2440 
2441     // Read a bootstrap specifier.
2442     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
2443     u2 bootstrap_method_index = cfs->get_u2_fast();
2444     u2 argument_count = cfs->get_u2_fast();
2445     check_property(
2446       valid_cp_range(bootstrap_method_index, cp_size) &&
2447       cp->tag_at(bootstrap_method_index).is_method_handle(),
2448       "bootstrap_method_index %u has bad constant type in class file %s",
2449       bootstrap_method_index,
2450       CHECK);
2451     operands->short_at_put(operand_fill_index++, bootstrap_method_index);
2452     operands->short_at_put(operand_fill_index++, argument_count);
2453 
2454     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
2455     for (int j = 0; j < argument_count; j++) {
2456       u2 argument_index = cfs->get_u2_fast();
2457       check_property(
2458         valid_cp_range(argument_index, cp_size) &&
2459         cp->tag_at(argument_index).is_loadable_constant(),
2460         "argument_index %u has bad constant type in class file %s",
2461         argument_index,
2462         CHECK);
2463       operands->short_at_put(operand_fill_index++, argument_index);
2464     }
2465   }
2466 
2467   assert(operand_fill_index == operands()->length(), "exact fill");
2468   assert(constantPoolOopDesc::operand_array_length(operands()) == attribute_array_length, "correct decode");
2469 
2470   u1* current_end = cfs->current();
2471   guarantee_property(current_end == current_start + attribute_byte_length,
2472                      "Bad length on BootstrapMethods in class file %s",
2473                      CHECK);
2474 
2475   cp->set_operands(operands());
2476 }
2477 
2478 
2479 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2480   ClassFileStream* cfs = stream();
2481   // Set inner classes attribute to default sentinel
2482   k->set_inner_classes(Universe::the_empty_short_array());
2483   cfs->guarantee_more(2, CHECK);  // attributes_count
2484   u2 attributes_count = cfs->get_u2_fast();
2485   bool parsed_sourcefile_attribute = false;
2486   bool parsed_innerclasses_attribute = false;
2487   bool parsed_enclosingmethod_attribute = false;
2488   bool parsed_bootstrap_methods_attribute = false;
2489   u1* runtime_visible_annotations = NULL;
2490   int runtime_visible_annotations_length = 0;
2491   u1* runtime_invisible_annotations = NULL;
2492   int runtime_invisible_annotations_length = 0;




2493   // Iterate over attributes
2494   while (attributes_count--) {
2495     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
2496     u2 attribute_name_index = cfs->get_u2_fast();
2497     u4 attribute_length = cfs->get_u4_fast();
2498     check_property(
2499       valid_cp_range(attribute_name_index, cp->length()) &&
2500         cp->tag_at(attribute_name_index).is_utf8(),
2501       "Attribute name has bad constant pool index %u in class file %s",
2502       attribute_name_index, CHECK);
2503     Symbol* tag = cp->symbol_at(attribute_name_index);
2504     if (tag == vmSymbols::tag_source_file()) {
2505       // Check for SourceFile tag
2506       if (_need_verify) {
2507         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2508       }
2509       if (parsed_sourcefile_attribute) {
2510         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2511       } else {
2512         parsed_sourcefile_attribute = true;
2513       }
2514       parse_classfile_sourcefile_attribute(cp, k, CHECK);
2515     } else if (tag == vmSymbols::tag_source_debug_extension()) {
2516       // Check for SourceDebugExtension tag
2517       parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK);
2518     } else if (tag == vmSymbols::tag_inner_classes()) {
2519       // Check for InnerClasses tag
2520       if (parsed_innerclasses_attribute) {
2521         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2522       } else {
2523         parsed_innerclasses_attribute = true;
2524       }
2525       u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK);
2526       if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2527         guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2528                           "Wrong InnerClasses attribute length in class file %s", CHECK);
2529       }
2530     } else if (tag == vmSymbols::tag_synthetic()) {
2531       // Check for Synthetic tag
2532       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2533       if (attribute_length != 0) {
2534         classfile_parse_error(
2535           "Invalid Synthetic classfile attribute length %u in class file %s",
2536           attribute_length, CHECK);
2537       }
2538       parse_classfile_synthetic_attribute(cp, k, CHECK);
2539     } else if (tag == vmSymbols::tag_deprecated()) {
2540       // Check for Deprecatd tag - 4276120
2541       if (attribute_length != 0) {
2542         classfile_parse_error(
2543           "Invalid Deprecated classfile attribute length %u in class file %s",
2544           attribute_length, CHECK);
2545       }
2546     } else if (_major_version >= JAVA_1_5_VERSION) {
2547       if (tag == vmSymbols::tag_signature()) {
2548         if (attribute_length != 2) {
2549           classfile_parse_error(
2550             "Wrong Signature attribute length %u in class file %s",
2551             attribute_length, CHECK);
2552         }
2553         parse_classfile_signature_attribute(cp, k, CHECK);
2554       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2555         runtime_visible_annotations_length = attribute_length;
2556         runtime_visible_annotations = cfs->get_u1_buffer();
2557         assert(runtime_visible_annotations != NULL, "null visible annotations");
2558         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2559       } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2560         runtime_invisible_annotations_length = attribute_length;
2561         runtime_invisible_annotations = cfs->get_u1_buffer();
2562         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2563         cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2564       } else if (tag == vmSymbols::tag_enclosing_method()) {
2565         if (parsed_enclosingmethod_attribute) {
2566           classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2567         }   else {
2568           parsed_enclosingmethod_attribute = true;
2569         }
2570         cfs->guarantee_more(4, CHECK);  // class_index, method_index
2571         u2 class_index  = cfs->get_u2_fast();
2572         u2 method_index = cfs->get_u2_fast();
2573         if (class_index == 0) {
2574           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2575         }
2576         // Validate the constant pool indices and types
2577         if (!cp->is_within_bounds(class_index) ||
2578             !is_klass_reference(cp, class_index)) {
2579           classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2580         }
2581         if (method_index != 0 &&
2582             (!cp->is_within_bounds(method_index) ||
2583              !cp->tag_at(method_index).is_name_and_type())) {
2584           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2585         }
2586         k->set_enclosing_method_indices(class_index, method_index);
2587       } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2588                  _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2589         if (parsed_bootstrap_methods_attribute)
2590           classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2591         parsed_bootstrap_methods_attribute = true;
2592         parse_classfile_bootstrap_methods_attribute(cp, k, attribute_length, CHECK);
2593       } else {
2594         // Unknown attribute
2595         cfs->skip_u1(attribute_length, CHECK);
2596       }
2597     } else {
2598       // Unknown attribute
2599       cfs->skip_u1(attribute_length, CHECK);
2600     }
2601   }
2602   typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
2603                                                      runtime_visible_annotations_length,
2604                                                      runtime_invisible_annotations,
2605                                                      runtime_invisible_annotations_length,
2606                                                      CHECK);
2607   k->set_class_annotations(annotations());
2608 












2609   if (_max_bootstrap_specifier_index >= 0) {
2610     guarantee_property(parsed_bootstrap_methods_attribute,
2611                        "Missing BootstrapMethods attribute in class file %s", CHECK);
2612   }
2613 }
2614 
2615 
2616 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
2617                                                       int runtime_visible_annotations_length,
2618                                                       u1* runtime_invisible_annotations,
2619                                                       int runtime_invisible_annotations_length, TRAPS) {
2620   typeArrayHandle annotations;
2621   if (runtime_visible_annotations != NULL ||
2622       runtime_invisible_annotations != NULL) {
2623     typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
2624                                                             runtime_invisible_annotations_length, CHECK_(annotations));
2625     annotations = typeArrayHandle(THREAD, anno);
2626     if (runtime_visible_annotations != NULL) {
2627       memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
2628     }
2629     if (runtime_invisible_annotations != NULL) {
2630       memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
2631     }
2632   }
2633   return annotations;
2634 }
2635 
2636 
2637 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
2638                                                     Handle class_loader,
2639                                                     Handle protection_domain,
2640                                                     KlassHandle host_klass,
2641                                                     GrowableArray<Handle>* cp_patches,
2642                                                     TempNewSymbol& parsed_name,
2643                                                     bool verify,
2644                                                     TRAPS) {
2645   // When a retransformable agent is attached, JVMTI caches the
2646   // class bytes that existed before the first retransformation.
2647   // If RedefineClasses() was used before the retransformable
2648   // agent attached, then the cached class bytes may not be the
2649   // original class bytes.
2650   unsigned char *cached_class_file_bytes = NULL;
2651   jint cached_class_file_length;
2652 
2653   ClassFileStream* cfs = stream();
2654   // Timing
2655   assert(THREAD->is_Java_thread(), "must be a JavaThread");
2656   JavaThread* jt = (JavaThread*) THREAD;
2657 
2658   PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2659                             ClassLoader::perf_class_parse_selftime(),
2660                             NULL,
2661                             jt->get_thread_stat()->perf_recursion_counts_addr(),
2662                             jt->get_thread_stat()->perf_timers_addr(),
2663                             PerfClassTraceTime::PARSE_CLASS);
2664 
2665   _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
2666   _max_bootstrap_specifier_index = -1;
2667 
2668   if (JvmtiExport::should_post_class_file_load_hook()) {
2669     // Get the cached class file bytes (if any) from the class that
2670     // is being redefined or retransformed. We use jvmti_thread_state()
2671     // instead of JvmtiThreadState::state_for(jt) so we don't allocate
2672     // a JvmtiThreadState any earlier than necessary. This will help
2673     // avoid the bug described by 7126851.
2674     JvmtiThreadState *state = jt->jvmti_thread_state();
2675     if (state != NULL) {
2676       KlassHandle *h_class_being_redefined =
2677                      state->get_class_being_redefined();
2678       if (h_class_being_redefined != NULL) {
2679         instanceKlassHandle ikh_class_being_redefined =
2680           instanceKlassHandle(THREAD, (*h_class_being_redefined)());
2681         cached_class_file_bytes =
2682           ikh_class_being_redefined->get_cached_class_file_bytes();
2683         cached_class_file_length =
2684           ikh_class_being_redefined->get_cached_class_file_len();
2685       }
2686     }
2687 
2688     unsigned char* ptr = cfs->buffer();
2689     unsigned char* end_ptr = cfs->buffer() + cfs->length();
2690 
2691     JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
2692                                            &ptr, &end_ptr,
2693                                            &cached_class_file_bytes,
2694                                            &cached_class_file_length);
2695 
2696     if (ptr != cfs->buffer()) {
2697       // JVMTI agent has modified class file data.
2698       // Set new class file stream using JVMTI agent modified
2699       // class file data.
2700       cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
2701       set_stream(cfs);
2702     }
2703   }
2704 
2705   _host_klass = host_klass;
2706   _cp_patches = cp_patches;
2707 
2708   instanceKlassHandle nullHandle;
2709 
2710   // Figure out whether we can skip format checking (matching classic VM behavior)
2711   _need_verify = Verifier::should_verify_for(class_loader(), verify);
2712 
2713   // Set the verify flag in stream
2714   cfs->set_verify(_need_verify);
2715 
2716   // Save the class file name for easier error message printing.
2717   _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
2718 
2719   cfs->guarantee_more(8, CHECK_(nullHandle));  // magic, major, minor
2720   // Magic value
2721   u4 magic = cfs->get_u4_fast();
2722   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
2723                      "Incompatible magic value %u in class file %s",
2724                      magic, CHECK_(nullHandle));
2725 
2726   // Version numbers
2727   u2 minor_version = cfs->get_u2_fast();
2728   u2 major_version = cfs->get_u2_fast();
2729 
2730   // Check version numbers - we check this even with verifier off
2731   if (!is_supported_version(major_version, minor_version)) {
2732     if (name == NULL) {
2733       Exceptions::fthrow(
2734         THREAD_AND_LOCATION,
2735         vmSymbols::java_lang_UnsupportedClassVersionError(),
2736         "Unsupported major.minor version %u.%u",
2737         major_version,
2738         minor_version);
2739     } else {
2740       ResourceMark rm(THREAD);
2741       Exceptions::fthrow(
2742         THREAD_AND_LOCATION,
2743         vmSymbols::java_lang_UnsupportedClassVersionError(),
2744         "%s : Unsupported major.minor version %u.%u",
2745         name->as_C_string(),
2746         major_version,
2747         minor_version);
2748     }
2749     return nullHandle;
2750   }
2751 
2752   _major_version = major_version;
2753   _minor_version = minor_version;
2754 
2755 
2756   // Check if verification needs to be relaxed for this class file
2757   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
2758   _relax_verify = Verifier::relax_verify_for(class_loader());
2759 
2760   // Constant pool
2761   constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
2762   ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
2763 
2764   int cp_size = cp->length();
2765 
2766   cfs->guarantee_more(8, CHECK_(nullHandle));  // flags, this_class, super_class, infs_len
2767 
2768   // Access flags
2769   AccessFlags access_flags;
2770   jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
2771 
2772   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2773     // Set abstract bit for old class files for backward compatibility
2774     flags |= JVM_ACC_ABSTRACT;
2775   }
2776   verify_legal_class_modifiers(flags, CHECK_(nullHandle));
2777   access_flags.set_flags(flags);
2778 
2779   // This class and superclass
2780   instanceKlassHandle super_klass;
2781   u2 this_class_index = cfs->get_u2_fast();
2782   check_property(
2783     valid_cp_range(this_class_index, cp_size) &&
2784       cp->tag_at(this_class_index).is_unresolved_klass(),
2785     "Invalid this class index %u in constant pool in class file %s",
2786     this_class_index, CHECK_(nullHandle));
2787 
2788   Symbol*  class_name  = cp->unresolved_klass_at(this_class_index);
2789   assert(class_name != NULL, "class_name can't be null");
2790 
2791   // It's important to set parsed_name *before* resolving the super class.
2792   // (it's used for cleanup by the caller if parsing fails)
2793   parsed_name = class_name;
2794   // parsed_name is returned and can be used if there's an error, so add to
2795   // its reference count.  Caller will decrement the refcount.
2796   parsed_name->increment_refcount();
2797 
2798   // Update _class_name which could be null previously to be class_name
2799   _class_name = class_name;
2800 
2801   // Don't need to check whether this class name is legal or not.
2802   // It has been checked when constant pool is parsed.
2803   // However, make sure it is not an array type.
2804   if (_need_verify) {
2805     guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
2806                        "Bad class name in class file %s",
2807                        CHECK_(nullHandle));
2808   }
2809 
2810   klassOop preserve_this_klass;   // for storing result across HandleMark
2811 
2812   // release all handles when parsing is done
2813   { HandleMark hm(THREAD);
2814 
2815     // Checks if name in class file matches requested name
2816     if (name != NULL && class_name != name) {
2817       ResourceMark rm(THREAD);
2818       Exceptions::fthrow(
2819         THREAD_AND_LOCATION,
2820         vmSymbols::java_lang_NoClassDefFoundError(),
2821         "%s (wrong name: %s)",
2822         name->as_C_string(),
2823         class_name->as_C_string()
2824       );
2825       return nullHandle;
2826     }
2827 
2828     if (TraceClassLoadingPreorder) {
2829       tty->print("[Loading %s", name->as_klass_external_name());
2830       if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
2831       tty->print_cr("]");
2832     }
2833 
2834     u2 super_class_index = cfs->get_u2_fast();
2835     if (super_class_index == 0) {
2836       check_property(class_name == vmSymbols::java_lang_Object(),
2837                      "Invalid superclass index %u in class file %s",
2838                      super_class_index,
2839                      CHECK_(nullHandle));
2840     } else {
2841       check_property(valid_cp_range(super_class_index, cp_size) &&
2842                      is_klass_reference(cp, super_class_index),
2843                      "Invalid superclass index %u in class file %s",
2844                      super_class_index,
2845                      CHECK_(nullHandle));
2846       // The class name should be legal because it is checked when parsing constant pool.
2847       // However, make sure it is not an array type.
2848       bool is_array = false;
2849       if (cp->tag_at(super_class_index).is_klass()) {
2850         super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
2851         if (_need_verify)
2852           is_array = super_klass->oop_is_array();
2853       } else if (_need_verify) {
2854         is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
2855       }
2856       if (_need_verify) {
2857         guarantee_property(!is_array,
2858                           "Bad superclass name in class file %s", CHECK_(nullHandle));
2859       }
2860     }
2861 
2862     // Interfaces
2863     u2 itfs_len = cfs->get_u2_fast();
2864     objArrayHandle local_interfaces;
2865     if (itfs_len == 0) {
2866       local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2867     } else {
2868       local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle));
2869     }
2870 
2871     u2 java_fields_count = 0;
2872     // Fields (offsets are filled in later)
2873     FieldAllocationCount fac;
2874     objArrayHandle fields_annotations;
2875     typeArrayHandle fields = parse_fields(class_name, cp, access_flags.is_interface(), &fac, &fields_annotations,
2876                                           &java_fields_count,
2877                                           CHECK_(nullHandle));
2878     // Methods
2879     bool has_final_method = false;
2880     AccessFlags promoted_flags;
2881     promoted_flags.set_flags(0);
2882     // These need to be oop pointers because they are allocated lazily
2883     // inside parse_methods inside a nested HandleMark
2884     objArrayOop methods_annotations_oop = NULL;
2885     objArrayOop methods_parameter_annotations_oop = NULL;
2886     objArrayOop methods_default_annotations_oop = NULL;
2887     objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
2888                                            &promoted_flags,
2889                                            &has_final_method,
2890                                            &methods_annotations_oop,
2891                                            &methods_parameter_annotations_oop,
2892                                            &methods_default_annotations_oop,
2893                                            CHECK_(nullHandle));
2894 
2895     objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
2896     objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
2897     objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
2898 
2899     // We check super class after class file is parsed and format is checked
2900     if (super_class_index > 0 && super_klass.is_null()) {
2901       Symbol*  sk  = cp->klass_name_at(super_class_index);
2902       if (access_flags.is_interface()) {
2903         // Before attempting to resolve the superclass, check for class format
2904         // errors not checked yet.
2905         guarantee_property(sk == vmSymbols::java_lang_Object(),
2906                            "Interfaces must have java.lang.Object as superclass in class file %s",
2907                            CHECK_(nullHandle));
2908       }
2909       klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
2910                                                            sk,
2911                                                            class_loader,
2912                                                            protection_domain,
2913                                                            true,
2914                                                            CHECK_(nullHandle));
2915 
2916       KlassHandle kh (THREAD, k);
2917       super_klass = instanceKlassHandle(THREAD, kh());
2918       if (LinkWellKnownClasses)  // my super class is well known to me
2919         cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve
2920     }
2921     if (super_klass.not_null()) {
2922       if (super_klass->is_interface()) {
2923         ResourceMark rm(THREAD);
2924         Exceptions::fthrow(
2925           THREAD_AND_LOCATION,
2926           vmSymbols::java_lang_IncompatibleClassChangeError(),
2927           "class %s has interface %s as super class",
2928           class_name->as_klass_external_name(),
2929           super_klass->external_name()
2930         );
2931         return nullHandle;
2932       }
2933       // Make sure super class is not final
2934       if (super_klass->is_final()) {
2935         THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
2936       }
2937     }
2938 
2939     // Compute the transitive list of all unique interfaces implemented by this class
2940     objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
2941 
2942     // sort methods
2943     typeArrayHandle method_ordering = sort_methods(methods,
2944                                                    methods_annotations,
2945                                                    methods_parameter_annotations,
2946                                                    methods_default_annotations,
2947                                                    CHECK_(nullHandle));
2948 
2949     // promote flags from parse_methods() to the klass' flags
2950     access_flags.add_promoted_flags(promoted_flags.as_int());
2951 
2952     // Size of Java vtable (in words)
2953     int vtable_size = 0;
2954     int itable_size = 0;
2955     int num_miranda_methods = 0;
2956 
2957     klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
2958                                                       num_miranda_methods,
2959                                                       super_klass(),
2960                                                       methods(),
2961                                                       access_flags,
2962                                                       class_loader,
2963                                                       class_name,
2964                                                       local_interfaces(),
2965                                                       CHECK_(nullHandle));
2966 
2967     // Size of Java itable (in words)
2968     itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
2969 
2970     // Field size and offset computation
2971     int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
2972 #ifndef PRODUCT
2973     int orig_nonstatic_field_size = 0;
2974 #endif
2975     int static_field_size = 0;
2976     int next_static_oop_offset;
2977     int next_static_double_offset;
2978     int next_static_word_offset;
2979     int next_static_short_offset;
2980     int next_static_byte_offset;
2981     int next_static_type_offset;
2982     int next_nonstatic_oop_offset;
2983     int next_nonstatic_double_offset;
2984     int next_nonstatic_word_offset;
2985     int next_nonstatic_short_offset;
2986     int next_nonstatic_byte_offset;
2987     int next_nonstatic_type_offset;
2988     int first_nonstatic_oop_offset;
2989     int first_nonstatic_field_offset;
2990     int next_nonstatic_field_offset;
2991 
2992     // Calculate the starting byte offsets
2993     next_static_oop_offset      = instanceMirrorKlass::offset_of_static_fields();
2994     next_static_double_offset   = next_static_oop_offset +
2995                                   (fac.count[STATIC_OOP] * heapOopSize);
2996     if ( fac.count[STATIC_DOUBLE] &&
2997          (Universe::field_type_should_be_aligned(T_DOUBLE) ||
2998           Universe::field_type_should_be_aligned(T_LONG)) ) {
2999       next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3000     }
3001 
3002     next_static_word_offset     = next_static_double_offset +
3003                                   (fac.count[STATIC_DOUBLE] * BytesPerLong);
3004     next_static_short_offset    = next_static_word_offset +
3005                                   (fac.count[STATIC_WORD] * BytesPerInt);
3006     next_static_byte_offset     = next_static_short_offset +
3007                                   (fac.count[STATIC_SHORT] * BytesPerShort);
3008     next_static_type_offset     = align_size_up((next_static_byte_offset +
3009                                   fac.count[STATIC_BYTE] ), wordSize );
3010     static_field_size           = (next_static_type_offset -
3011                                   next_static_oop_offset) / wordSize;
3012 
3013     first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3014                                    nonstatic_field_size * heapOopSize;
3015     next_nonstatic_field_offset = first_nonstatic_field_offset;
3016 
3017     unsigned int nonstatic_double_count = fac.count[NONSTATIC_DOUBLE];
3018     unsigned int nonstatic_word_count   = fac.count[NONSTATIC_WORD];
3019     unsigned int nonstatic_short_count  = fac.count[NONSTATIC_SHORT];
3020     unsigned int nonstatic_byte_count   = fac.count[NONSTATIC_BYTE];
3021     unsigned int nonstatic_oop_count    = fac.count[NONSTATIC_OOP];
3022 
3023     bool super_has_nonstatic_fields =
3024             (super_klass() != NULL && super_klass->has_nonstatic_fields());
3025     bool has_nonstatic_fields  =  super_has_nonstatic_fields ||
3026             ((nonstatic_double_count + nonstatic_word_count +
3027               nonstatic_short_count + nonstatic_byte_count +
3028               nonstatic_oop_count) != 0);
3029 
3030 
3031     // Prepare list of oops for oop map generation.
3032     int* nonstatic_oop_offsets;
3033     unsigned int* nonstatic_oop_counts;
3034     unsigned int nonstatic_oop_map_count = 0;
3035 
3036     nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3037               THREAD, int, nonstatic_oop_count + 1);
3038     nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
3039               THREAD, unsigned int, nonstatic_oop_count + 1);
3040 
3041     first_nonstatic_oop_offset = 0; // will be set for first oop field
3042 
3043 #ifndef PRODUCT
3044     if( PrintCompactFieldsSavings ) {
3045       next_nonstatic_double_offset = next_nonstatic_field_offset +
3046                                      (nonstatic_oop_count * heapOopSize);
3047       if ( nonstatic_double_count > 0 ) {
3048         next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3049       }
3050       next_nonstatic_word_offset  = next_nonstatic_double_offset +
3051                                     (nonstatic_double_count * BytesPerLong);
3052       next_nonstatic_short_offset = next_nonstatic_word_offset +
3053                                     (nonstatic_word_count * BytesPerInt);
3054       next_nonstatic_byte_offset  = next_nonstatic_short_offset +
3055                                     (nonstatic_short_count * BytesPerShort);
3056       next_nonstatic_type_offset  = align_size_up((next_nonstatic_byte_offset +
3057                                     nonstatic_byte_count ), heapOopSize );
3058       orig_nonstatic_field_size   = nonstatic_field_size +
3059       ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3060     }
3061 #endif
3062     bool compact_fields   = CompactFields;
3063     int  allocation_style = FieldsAllocationStyle;
3064     if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3065       assert(false, "0 <= FieldsAllocationStyle <= 2");
3066       allocation_style = 1; // Optimistic
3067     }
3068 
3069     // The next classes have predefined hard-coded fields offsets
3070     // (see in JavaClasses::compute_hard_coded_offsets()).
3071     // Use default fields allocation order for them.
3072     if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3073         (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3074          class_name == vmSymbols::java_lang_Class() ||
3075          class_name == vmSymbols::java_lang_ClassLoader() ||
3076          class_name == vmSymbols::java_lang_ref_Reference() ||
3077          class_name == vmSymbols::java_lang_ref_SoftReference() ||
3078          class_name == vmSymbols::java_lang_StackTraceElement() ||
3079          class_name == vmSymbols::java_lang_String() ||
3080          class_name == vmSymbols::java_lang_Throwable() ||
3081          class_name == vmSymbols::java_lang_Boolean() ||
3082          class_name == vmSymbols::java_lang_Character() ||
3083          class_name == vmSymbols::java_lang_Float() ||
3084          class_name == vmSymbols::java_lang_Double() ||
3085          class_name == vmSymbols::java_lang_Byte() ||
3086          class_name == vmSymbols::java_lang_Short() ||
3087          class_name == vmSymbols::java_lang_Integer() ||
3088          class_name == vmSymbols::java_lang_Long())) {
3089       allocation_style = 0;     // Allocate oops first
3090       compact_fields   = false; // Don't compact fields
3091     }
3092 
3093     if( allocation_style == 0 ) {
3094       // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3095       next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3096       next_nonstatic_double_offset = next_nonstatic_oop_offset +
3097                                       (nonstatic_oop_count * heapOopSize);
3098     } else if( allocation_style == 1 ) {
3099       // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3100       next_nonstatic_double_offset = next_nonstatic_field_offset;
3101     } else if( allocation_style == 2 ) {
3102       // Fields allocation: oops fields in super and sub classes are together.
3103       if( nonstatic_field_size > 0 && super_klass() != NULL &&
3104           super_klass->nonstatic_oop_map_size() > 0 ) {
3105         int map_count = super_klass->nonstatic_oop_map_count();
3106         OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3107         OopMapBlock* last_map = first_map + map_count - 1;
3108         int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3109         if (next_offset == next_nonstatic_field_offset) {
3110           allocation_style = 0;   // allocate oops first
3111           next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3112           next_nonstatic_double_offset = next_nonstatic_oop_offset +
3113                                          (nonstatic_oop_count * heapOopSize);
3114         }
3115       }
3116       if( allocation_style == 2 ) {
3117         allocation_style = 1;     // allocate oops last
3118         next_nonstatic_double_offset = next_nonstatic_field_offset;
3119       }
3120     } else {
3121       ShouldNotReachHere();
3122     }
3123 
3124     int nonstatic_oop_space_count   = 0;
3125     int nonstatic_word_space_count  = 0;
3126     int nonstatic_short_space_count = 0;
3127     int nonstatic_byte_space_count  = 0;
3128     int nonstatic_oop_space_offset;
3129     int nonstatic_word_space_offset;
3130     int nonstatic_short_space_offset;
3131     int nonstatic_byte_space_offset;
3132 
3133     if( nonstatic_double_count > 0 ) {
3134       int offset = next_nonstatic_double_offset;
3135       next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3136       if( compact_fields && offset != next_nonstatic_double_offset ) {
3137         // Allocate available fields into the gap before double field.
3138         int length = next_nonstatic_double_offset - offset;
3139         assert(length == BytesPerInt, "");
3140         nonstatic_word_space_offset = offset;
3141         if( nonstatic_word_count > 0 ) {
3142           nonstatic_word_count      -= 1;
3143           nonstatic_word_space_count = 1; // Only one will fit
3144           length -= BytesPerInt;
3145           offset += BytesPerInt;
3146         }
3147         nonstatic_short_space_offset = offset;
3148         while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3149           nonstatic_short_count       -= 1;
3150           nonstatic_short_space_count += 1;
3151           length -= BytesPerShort;
3152           offset += BytesPerShort;
3153         }
3154         nonstatic_byte_space_offset = offset;
3155         while( length > 0 && nonstatic_byte_count > 0 ) {
3156           nonstatic_byte_count       -= 1;
3157           nonstatic_byte_space_count += 1;
3158           length -= 1;
3159         }
3160         // Allocate oop field in the gap if there are no other fields for that.
3161         nonstatic_oop_space_offset = offset;
3162         if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3163             allocation_style != 0 ) { // when oop fields not first
3164           nonstatic_oop_count      -= 1;
3165           nonstatic_oop_space_count = 1; // Only one will fit
3166           length -= heapOopSize;
3167           offset += heapOopSize;
3168         }
3169       }
3170     }
3171 
3172     next_nonstatic_word_offset  = next_nonstatic_double_offset +
3173                                   (nonstatic_double_count * BytesPerLong);
3174     next_nonstatic_short_offset = next_nonstatic_word_offset +
3175                                   (nonstatic_word_count * BytesPerInt);
3176     next_nonstatic_byte_offset  = next_nonstatic_short_offset +
3177                                   (nonstatic_short_count * BytesPerShort);
3178 
3179     int notaligned_offset;
3180     if( allocation_style == 0 ) {
3181       notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3182     } else { // allocation_style == 1
3183       next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3184       if( nonstatic_oop_count > 0 ) {
3185         next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3186       }
3187       notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3188     }
3189     next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3190     nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3191                                    - first_nonstatic_field_offset)/heapOopSize);
3192 
3193     // Iterate over fields again and compute correct offsets.
3194     // The field allocation type was temporarily stored in the offset slot.
3195     // oop fields are located before non-oop fields (static and non-static).
3196     for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3197       int real_offset;
3198       FieldAllocationType atype = (FieldAllocationType) fs.offset();
3199       switch (atype) {
3200         case STATIC_OOP:
3201           real_offset = next_static_oop_offset;
3202           next_static_oop_offset += heapOopSize;
3203           break;
3204         case STATIC_BYTE:
3205           real_offset = next_static_byte_offset;
3206           next_static_byte_offset += 1;
3207           break;
3208         case STATIC_SHORT:
3209           real_offset = next_static_short_offset;
3210           next_static_short_offset += BytesPerShort;
3211           break;
3212         case STATIC_WORD:
3213           real_offset = next_static_word_offset;
3214           next_static_word_offset += BytesPerInt;
3215           break;
3216         case STATIC_DOUBLE:
3217           real_offset = next_static_double_offset;
3218           next_static_double_offset += BytesPerLong;
3219           break;
3220         case NONSTATIC_OOP:
3221           if( nonstatic_oop_space_count > 0 ) {
3222             real_offset = nonstatic_oop_space_offset;
3223             nonstatic_oop_space_offset += heapOopSize;
3224             nonstatic_oop_space_count  -= 1;
3225           } else {
3226             real_offset = next_nonstatic_oop_offset;
3227             next_nonstatic_oop_offset += heapOopSize;
3228           }
3229           // Update oop maps
3230           if( nonstatic_oop_map_count > 0 &&
3231               nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3232               real_offset -
3233               int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3234               heapOopSize ) {
3235             // Extend current oop map
3236             nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3237           } else {
3238             // Create new oop map
3239             nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3240             nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3241             nonstatic_oop_map_count += 1;
3242             if( first_nonstatic_oop_offset == 0 ) { // Undefined
3243               first_nonstatic_oop_offset = real_offset;
3244             }
3245           }
3246           break;
3247         case NONSTATIC_BYTE:
3248           if( nonstatic_byte_space_count > 0 ) {
3249             real_offset = nonstatic_byte_space_offset;
3250             nonstatic_byte_space_offset += 1;
3251             nonstatic_byte_space_count  -= 1;
3252           } else {
3253             real_offset = next_nonstatic_byte_offset;
3254             next_nonstatic_byte_offset += 1;
3255           }
3256           break;
3257         case NONSTATIC_SHORT:
3258           if( nonstatic_short_space_count > 0 ) {
3259             real_offset = nonstatic_short_space_offset;
3260             nonstatic_short_space_offset += BytesPerShort;
3261             nonstatic_short_space_count  -= 1;
3262           } else {
3263             real_offset = next_nonstatic_short_offset;
3264             next_nonstatic_short_offset += BytesPerShort;
3265           }
3266           break;
3267         case NONSTATIC_WORD:
3268           if( nonstatic_word_space_count > 0 ) {
3269             real_offset = nonstatic_word_space_offset;
3270             nonstatic_word_space_offset += BytesPerInt;
3271             nonstatic_word_space_count  -= 1;
3272           } else {
3273             real_offset = next_nonstatic_word_offset;
3274             next_nonstatic_word_offset += BytesPerInt;
3275           }
3276           break;
3277         case NONSTATIC_DOUBLE:
3278           real_offset = next_nonstatic_double_offset;
3279           next_nonstatic_double_offset += BytesPerLong;
3280           break;
3281         default:
3282           ShouldNotReachHere();
3283       }
3284       fs.set_offset(real_offset);
3285     }
3286 
3287     // Size of instances
3288     int instance_size;
3289 
3290     next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3291     instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3292 
3293     assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3294 
3295     // Number of non-static oop map blocks allocated at end of klass.
3296     const unsigned int total_oop_map_count =
3297       compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3298                             first_nonstatic_oop_offset);
3299 
3300     // Compute reference type
3301     ReferenceType rt;
3302     if (super_klass() == NULL) {
3303       rt = REF_NONE;
3304     } else {
3305       rt = super_klass->reference_type();
3306     }
3307 
3308     // We can now create the basic klassOop for this klass
3309     klassOop ik = oopFactory::new_instanceKlass(name, vtable_size, itable_size,
3310                                                 static_field_size,
3311                                                 total_oop_map_count,
3312                                                 rt, CHECK_(nullHandle));
3313     instanceKlassHandle this_klass (THREAD, ik);
3314 
3315     assert(this_klass->static_field_size() == static_field_size, "sanity");
3316     assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3317            "sanity");
3318 
3319     // Fill in information already parsed
3320     this_klass->set_access_flags(access_flags);
3321     this_klass->set_should_verify_class(verify);
3322     jint lh = Klass::instance_layout_helper(instance_size, false);
3323     this_klass->set_layout_helper(lh);
3324     assert(this_klass->oop_is_instance(), "layout is correct");
3325     assert(this_klass->size_helper() == instance_size, "correct size_helper");
3326     // Not yet: supers are done below to support the new subtype-checking fields
3327     //this_klass->set_super(super_klass());
3328     this_klass->set_class_loader(class_loader());
3329     this_klass->set_nonstatic_field_size(nonstatic_field_size);
3330     this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3331     this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
3332     cp->set_pool_holder(this_klass());
3333     error_handler.set_in_error(false);   // turn off error handler for cp
3334     this_klass->set_constants(cp());
3335     this_klass->set_local_interfaces(local_interfaces());
3336     this_klass->set_fields(fields(), java_fields_count);
3337     this_klass->set_methods(methods());
3338     if (has_final_method) {
3339       this_klass->set_has_final_method();
3340     }
3341     this_klass->set_method_ordering(method_ordering());
3342     // The instanceKlass::_methods_jmethod_ids cache and the
3343     // instanceKlass::_methods_cached_itable_indices cache are
3344     // both managed on the assumption that the initial cache
3345     // size is equal to the number of methods in the class. If
3346     // that changes, then instanceKlass::idnum_can_increment()
3347     // has to be changed accordingly.
3348     this_klass->set_initial_method_idnum(methods->length());
3349     this_klass->set_name(cp->klass_name_at(this_class_index));
3350     if (LinkWellKnownClasses || is_anonymous())  // I am well known to myself
3351       cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3352     this_klass->set_protection_domain(protection_domain());
3353     this_klass->set_fields_annotations(fields_annotations());
3354     this_klass->set_methods_annotations(methods_annotations());
3355     this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
3356     this_klass->set_methods_default_annotations(methods_default_annotations());
3357 
3358     this_klass->set_minor_version(minor_version);
3359     this_klass->set_major_version(major_version);
3360 
3361     // Set up methodOop::intrinsic_id as soon as we know the names of methods.
3362     // (We used to do this lazily, but now we query it in Rewriter,
3363     // which is eagerly done for every method, so we might as well do it now,
3364     // when everything is fresh in memory.)
3365     if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) {
3366       for (int j = 0; j < methods->length(); j++) {
3367         ((methodOop)methods->obj_at(j))->init_intrinsic_id();
3368       }
3369     }
3370 
3371     if (cached_class_file_bytes != NULL) {
3372       // JVMTI: we have an instanceKlass now, tell it about the cached bytes
3373       this_klass->set_cached_class_file(cached_class_file_bytes,
3374                                         cached_class_file_length);
3375     }
3376 
3377     // Miranda methods
3378     if ((num_miranda_methods > 0) ||
3379         // if this class introduced new miranda methods or
3380         (super_klass.not_null() && (super_klass->has_miranda_methods()))
3381         // super class exists and this class inherited miranda methods
3382         ) {
3383       this_klass->set_has_miranda_methods(); // then set a flag
3384     }
3385 
3386     // Additional attributes
3387     parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle));
3388 
3389     // Make sure this is the end of class file stream
3390     guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3391 
3392     // VerifyOops believes that once this has been set, the object is completely loaded.
3393     // Compute transitive closure of interfaces this class implements
3394     this_klass->set_transitive_interfaces(transitive_interfaces());
3395 
3396     // Fill in information needed to compute superclasses.
3397     this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3398 
3399     // Initialize itable offset tables
3400     klassItable::setup_itable_offset_table(this_klass);
3401 
3402     // Do final class setup
3403     fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3404 
3405     set_precomputed_flags(this_klass);
3406 
3407     // reinitialize modifiers, using the InnerClasses attribute
3408     int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3409     this_klass->set_modifier_flags(computed_modifiers);
3410 
3411     // check if this class can access its super class
3412     check_super_class_access(this_klass, CHECK_(nullHandle));
3413 
3414     // check if this class can access its superinterfaces
3415     check_super_interface_access(this_klass, CHECK_(nullHandle));
3416 
3417     // check if this class overrides any final method
3418     check_final_method_override(this_klass, CHECK_(nullHandle));
3419 
3420     // check that if this class is an interface then it doesn't have static methods
3421     if (this_klass->is_interface()) {
3422       check_illegal_static_method(this_klass, CHECK_(nullHandle));
3423     }
3424 
3425     // Allocate mirror and initialize static fields
3426     java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle));
3427 
3428     ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
3429                                              false /* not shared class */);
3430 
3431     if (TraceClassLoading) {
3432       // print in a single call to reduce interleaving of output
3433       if (cfs->source() != NULL) {
3434         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3435                    cfs->source());
3436       } else if (class_loader.is_null()) {
3437         if (THREAD->is_Java_thread()) {
3438           klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3439           tty->print("[Loaded %s by instance of %s]\n",
3440                      this_klass->external_name(),
3441                      instanceKlass::cast(caller)->external_name());
3442         } else {
3443           tty->print("[Loaded %s]\n", this_klass->external_name());
3444         }
3445       } else {
3446         ResourceMark rm;
3447         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3448                    instanceKlass::cast(class_loader->klass())->external_name());
3449       }
3450     }
3451 
3452     if (TraceClassResolution) {
3453       // print out the superclass.
3454       const char * from = Klass::cast(this_klass())->external_name();
3455       if (this_klass->java_super() != NULL) {
3456         tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name());
3457       }
3458       // print out each of the interface classes referred to by this class.
3459       objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
3460       if (!local_interfaces.is_null()) {
3461         int length = local_interfaces->length();
3462         for (int i = 0; i < length; i++) {
3463           klassOop k = klassOop(local_interfaces->obj_at(i));
3464           instanceKlass* to_class = instanceKlass::cast(k);
3465           const char * to = to_class->external_name();
3466           tty->print("RESOLVE %s %s (interface)\n", from, to);
3467         }
3468       }
3469     }
3470 
3471 #ifndef PRODUCT
3472     if( PrintCompactFieldsSavings ) {
3473       if( nonstatic_field_size < orig_nonstatic_field_size ) {
3474         tty->print("[Saved %d of %d bytes in %s]\n",
3475                  (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3476                  orig_nonstatic_field_size*heapOopSize,
3477                  this_klass->external_name());
3478       } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3479         tty->print("[Wasted %d over %d bytes in %s]\n",
3480                  (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3481                  orig_nonstatic_field_size*heapOopSize,
3482                  this_klass->external_name());
3483       }
3484     }
3485 #endif
3486 
3487     // preserve result across HandleMark
3488     preserve_this_klass = this_klass();
3489   }
3490 
3491   // Create new handle outside HandleMark
3492   instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3493   debug_only(this_klass->as_klassOop()->verify();)
3494 
3495   return this_klass;
3496 }
3497 
3498 
3499 unsigned int
3500 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3501                                        unsigned int nonstatic_oop_map_count,
3502                                        int first_nonstatic_oop_offset) {
3503   unsigned int map_count =
3504     super.is_null() ? 0 : super->nonstatic_oop_map_count();
3505   if (nonstatic_oop_map_count > 0) {
3506     // We have oops to add to map
3507     if (map_count == 0) {
3508       map_count = nonstatic_oop_map_count;
3509     } else {
3510       // Check whether we should add a new map block or whether the last one can
3511       // be extended
3512       OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3513       OopMapBlock* const last_map = first_map + map_count - 1;
3514 
3515       int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3516       if (next_offset == first_nonstatic_oop_offset) {
3517         // There is no gap bettwen superklass's last oop field and first
3518         // local oop field, merge maps.
3519         nonstatic_oop_map_count -= 1;
3520       } else {
3521         // Superklass didn't end with a oop field, add extra maps
3522         assert(next_offset < first_nonstatic_oop_offset, "just checking");
3523       }
3524       map_count += nonstatic_oop_map_count;
3525     }
3526   }
3527   return map_count;
3528 }
3529 
3530 
3531 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3532                                     unsigned int nonstatic_oop_map_count,
3533                                     int* nonstatic_oop_offsets,
3534                                     unsigned int* nonstatic_oop_counts) {
3535   OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3536   const instanceKlass* const super = k->superklass();
3537   const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3538   if (super_count > 0) {
3539     // Copy maps from superklass
3540     OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3541     for (unsigned int i = 0; i < super_count; ++i) {
3542       *this_oop_map++ = *super_oop_map++;
3543     }
3544   }
3545 
3546   if (nonstatic_oop_map_count > 0) {
3547     if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3548       // The counts differ because there is no gap between superklass's last oop
3549       // field and the first local oop field.  Extend the last oop map copied
3550       // from the superklass instead of creating new one.
3551       nonstatic_oop_map_count--;
3552       nonstatic_oop_offsets++;
3553       this_oop_map--;
3554       this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3555       this_oop_map++;
3556     }
3557 
3558     // Add new map blocks, fill them
3559     while (nonstatic_oop_map_count-- > 0) {
3560       this_oop_map->set_offset(*nonstatic_oop_offsets++);
3561       this_oop_map->set_count(*nonstatic_oop_counts++);
3562       this_oop_map++;
3563     }
3564     assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3565            this_oop_map, "sanity");
3566   }
3567 }
3568 
3569 
3570 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3571   klassOop super = k->super();
3572 
3573   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3574   // in which case we don't have to register objects as finalizable
3575   if (!_has_empty_finalizer) {
3576     if (_has_finalizer ||
3577         (super != NULL && super->klass_part()->has_finalizer())) {
3578       k->set_has_finalizer();
3579     }
3580   }
3581 
3582 #ifdef ASSERT
3583   bool f = false;
3584   methodOop m = k->lookup_method(vmSymbols::finalize_method_name(),
3585                                  vmSymbols::void_method_signature());
3586   if (m != NULL && !m->is_empty_method()) {
3587     f = true;
3588   }
3589   assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3590 #endif
3591 
3592   // Check if this klass supports the java.lang.Cloneable interface
3593   if (SystemDictionary::Cloneable_klass_loaded()) {
3594     if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
3595       k->set_is_cloneable();
3596     }
3597   }
3598 
3599   // Check if this klass has a vanilla default constructor
3600   if (super == NULL) {
3601     // java.lang.Object has empty default constructor
3602     k->set_has_vanilla_constructor();
3603   } else {
3604     if (Klass::cast(super)->has_vanilla_constructor() &&
3605         _has_vanilla_constructor) {
3606       k->set_has_vanilla_constructor();
3607     }
3608 #ifdef ASSERT
3609     bool v = false;
3610     if (Klass::cast(super)->has_vanilla_constructor()) {
3611       methodOop constructor = k->find_method(vmSymbols::object_initializer_name(
3612 ), vmSymbols::void_method_signature());
3613       if (constructor != NULL && constructor->is_vanilla_constructor()) {
3614         v = true;
3615       }
3616     }
3617     assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3618 #endif
3619   }
3620 
3621   // If it cannot be fast-path allocated, set a bit in the layout helper.
3622   // See documentation of instanceKlass::can_be_fastpath_allocated().
3623   assert(k->size_helper() > 0, "layout_helper is initialized");
3624   if ((!RegisterFinalizersAtInit && k->has_finalizer())
3625       || k->is_abstract() || k->is_interface()
3626       || (k->name() == vmSymbols::java_lang_Class()
3627           && k->class_loader() == NULL)
3628       || k->size_helper() >= FastAllocateSizeLimit) {
3629     // Forbid fast-path allocation.
3630     jint lh = Klass::instance_layout_helper(k->size_helper(), true);
3631     k->set_layout_helper(lh);
3632   }
3633 }
3634 
3635 
3636 // utility method for appending and array with check for duplicates
3637 
3638 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
3639   // iterate over new interfaces
3640   for (int i = 0; i < ifs->length(); i++) {
3641     oop e = ifs->obj_at(i);
3642     assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
3643     // check for duplicates
3644     bool duplicate = false;
3645     for (int j = 0; j < index; j++) {
3646       if (result->obj_at(j) == e) {
3647         duplicate = true;
3648         break;
3649       }
3650     }
3651     // add new interface
3652     if (!duplicate) {
3653       result->obj_at_put(index++, e);
3654     }
3655   }
3656 }
3657 
3658 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) {
3659   // Compute maximum size for transitive interfaces
3660   int max_transitive_size = 0;
3661   int super_size = 0;
3662   // Add superclass transitive interfaces size
3663   if (super.not_null()) {
3664     super_size = super->transitive_interfaces()->length();
3665     max_transitive_size += super_size;
3666   }
3667   // Add local interfaces' super interfaces
3668   int local_size = local_ifs->length();
3669   for (int i = 0; i < local_size; i++) {
3670     klassOop l = klassOop(local_ifs->obj_at(i));
3671     max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
3672   }
3673   // Finally add local interfaces
3674   max_transitive_size += local_size;
3675   // Construct array
3676   objArrayHandle result;
3677   if (max_transitive_size == 0) {
3678     // no interfaces, use canonicalized array
3679     result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3680   } else if (max_transitive_size == super_size) {
3681     // no new local interfaces added, share superklass' transitive interface array
3682     result = objArrayHandle(THREAD, super->transitive_interfaces());
3683   } else if (max_transitive_size == local_size) {
3684     // only local interfaces added, share local interface array
3685     result = local_ifs;
3686   } else {
3687     objArrayHandle nullHandle;
3688     objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
3689     result = objArrayHandle(THREAD, new_objarray);
3690     int index = 0;
3691     // Copy down from superclass
3692     if (super.not_null()) {
3693       append_interfaces(result, index, super->transitive_interfaces());
3694     }
3695     // Copy down from local interfaces' superinterfaces
3696     for (int i = 0; i < local_ifs->length(); i++) {
3697       klassOop l = klassOop(local_ifs->obj_at(i));
3698       append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
3699     }
3700     // Finally add local interfaces
3701     append_interfaces(result, index, local_ifs());
3702 
3703     // Check if duplicates were removed
3704     if (index != max_transitive_size) {
3705       assert(index < max_transitive_size, "just checking");
3706       objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
3707       for (int i = 0; i < index; i++) {
3708         oop e = result->obj_at(i);
3709         assert(e != NULL, "just checking");
3710         new_result->obj_at_put(i, e);
3711       }
3712       result = objArrayHandle(THREAD, new_result);
3713     }
3714   }
3715   return result;
3716 }
3717 
3718 
3719 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
3720   klassOop super = this_klass->super();
3721   if ((super != NULL) &&
3722       (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
3723     ResourceMark rm(THREAD);
3724     Exceptions::fthrow(
3725       THREAD_AND_LOCATION,
3726       vmSymbols::java_lang_IllegalAccessError(),
3727       "class %s cannot access its superclass %s",
3728       this_klass->external_name(),
3729       instanceKlass::cast(super)->external_name()
3730     );
3731     return;
3732   }
3733 }
3734 
3735 
3736 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
3737   objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
3738   int lng = local_interfaces->length();
3739   for (int i = lng - 1; i >= 0; i--) {
3740     klassOop k = klassOop(local_interfaces->obj_at(i));
3741     assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
3742     if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
3743       ResourceMark rm(THREAD);
3744       Exceptions::fthrow(
3745         THREAD_AND_LOCATION,
3746         vmSymbols::java_lang_IllegalAccessError(),
3747         "class %s cannot access its superinterface %s",
3748         this_klass->external_name(),
3749         instanceKlass::cast(k)->external_name()
3750       );
3751       return;
3752     }
3753   }
3754 }
3755 
3756 
3757 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
3758   objArrayHandle methods (THREAD, this_klass->methods());
3759   int num_methods = methods->length();
3760 
3761   // go thru each method and check if it overrides a final method
3762   for (int index = 0; index < num_methods; index++) {
3763     methodOop m = (methodOop)methods->obj_at(index);
3764 
3765     // skip private, static and <init> methods
3766     if ((!m->is_private()) &&
3767         (!m->is_static()) &&
3768         (m->name() != vmSymbols::object_initializer_name())) {
3769 
3770       Symbol* name = m->name();
3771       Symbol* signature = m->signature();
3772       klassOop k = this_klass->super();
3773       methodOop super_m = NULL;
3774       while (k != NULL) {
3775         // skip supers that don't have final methods.
3776         if (k->klass_part()->has_final_method()) {
3777           // lookup a matching method in the super class hierarchy
3778           super_m = instanceKlass::cast(k)->lookup_method(name, signature);
3779           if (super_m == NULL) {
3780             break; // didn't find any match; get out
3781           }
3782 
3783           if (super_m->is_final() &&
3784               // matching method in super is final
3785               (Reflection::verify_field_access(this_klass->as_klassOop(),
3786                                                super_m->method_holder(),
3787                                                super_m->method_holder(),
3788                                                super_m->access_flags(), false))
3789             // this class can access super final method and therefore override
3790             ) {
3791             ResourceMark rm(THREAD);
3792             Exceptions::fthrow(
3793               THREAD_AND_LOCATION,
3794               vmSymbols::java_lang_VerifyError(),
3795               "class %s overrides final method %s.%s",
3796               this_klass->external_name(),
3797               name->as_C_string(),
3798               signature->as_C_string()
3799             );
3800             return;
3801           }
3802 
3803           // continue to look from super_m's holder's super.
3804           k = instanceKlass::cast(super_m->method_holder())->super();
3805           continue;
3806         }
3807 
3808         k = k->klass_part()->super();
3809       }
3810     }
3811   }
3812 }
3813 
3814 
3815 // assumes that this_klass is an interface
3816 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
3817   assert(this_klass->is_interface(), "not an interface");
3818   objArrayHandle methods (THREAD, this_klass->methods());
3819   int num_methods = methods->length();
3820 
3821   for (int index = 0; index < num_methods; index++) {
3822     methodOop m = (methodOop)methods->obj_at(index);
3823     // if m is static and not the init method, throw a verify error
3824     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
3825       ResourceMark rm(THREAD);
3826       Exceptions::fthrow(
3827         THREAD_AND_LOCATION,
3828         vmSymbols::java_lang_VerifyError(),
3829         "Illegal static method %s in interface %s",
3830         m->name()->as_C_string(),
3831         this_klass->external_name()
3832       );
3833       return;
3834     }
3835   }
3836 }
3837 
3838 // utility methods for format checking
3839 
3840 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
3841   if (!_need_verify) { return; }
3842 
3843   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
3844   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
3845   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
3846   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
3847   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
3848   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
3849   const bool major_gte_15  = _major_version >= JAVA_1_5_VERSION;
3850 
3851   if ((is_abstract && is_final) ||
3852       (is_interface && !is_abstract) ||
3853       (is_interface && major_gte_15 && (is_super || is_enum)) ||
3854       (!is_interface && major_gte_15 && is_annotation)) {
3855     ResourceMark rm(THREAD);
3856     Exceptions::fthrow(
3857       THREAD_AND_LOCATION,
3858       vmSymbols::java_lang_ClassFormatError(),
3859       "Illegal class modifiers in class %s: 0x%X",
3860       _class_name->as_C_string(), flags
3861     );
3862     return;
3863   }
3864 }
3865 
3866 bool ClassFileParser::has_illegal_visibility(jint flags) {
3867   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
3868   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
3869   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
3870 
3871   return ((is_public && is_protected) ||
3872           (is_public && is_private) ||
3873           (is_protected && is_private));
3874 }
3875 
3876 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
3877   u2 max_version =
3878     JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
3879     (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
3880   return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
3881          (major <= max_version) &&
3882          ((major != max_version) ||
3883           (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
3884 }
3885 
3886 void ClassFileParser::verify_legal_field_modifiers(
3887     jint flags, bool is_interface, TRAPS) {
3888   if (!_need_verify) { return; }
3889 
3890   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
3891   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
3892   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
3893   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
3894   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
3895   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
3896   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
3897   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
3898   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
3899 
3900   bool is_illegal = false;
3901 
3902   if (is_interface) {
3903     if (!is_public || !is_static || !is_final || is_private ||
3904         is_protected || is_volatile || is_transient ||
3905         (major_gte_15 && is_enum)) {
3906       is_illegal = true;
3907     }
3908   } else { // not interface
3909     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
3910       is_illegal = true;
3911     }
3912   }
3913 
3914   if (is_illegal) {
3915     ResourceMark rm(THREAD);
3916     Exceptions::fthrow(
3917       THREAD_AND_LOCATION,
3918       vmSymbols::java_lang_ClassFormatError(),
3919       "Illegal field modifiers in class %s: 0x%X",
3920       _class_name->as_C_string(), flags);
3921     return;
3922   }
3923 }
3924 
3925 void ClassFileParser::verify_legal_method_modifiers(
3926     jint flags, bool is_interface, Symbol* name, TRAPS) {
3927   if (!_need_verify) { return; }
3928 
3929   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
3930   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
3931   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
3932   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
3933   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
3934   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
3935   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
3936   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
3937   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
3938   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
3939   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
3940 
3941   bool is_illegal = false;
3942 
3943   if (is_interface) {
3944     if (!is_abstract || !is_public || is_static || is_final ||
3945         is_native || (major_gte_15 && (is_synchronized || is_strict))) {
3946       is_illegal = true;
3947     }
3948   } else { // not interface
3949     if (is_initializer) {
3950       if (is_static || is_final || is_synchronized || is_native ||
3951           is_abstract || (major_gte_15 && is_bridge)) {
3952         is_illegal = true;
3953       }
3954     } else { // not initializer
3955       if (is_abstract) {
3956         if ((is_final || is_native || is_private || is_static ||
3957             (major_gte_15 && (is_synchronized || is_strict)))) {
3958           is_illegal = true;
3959         }
3960       }
3961       if (has_illegal_visibility(flags)) {
3962         is_illegal = true;
3963       }
3964     }
3965   }
3966 
3967   if (is_illegal) {
3968     ResourceMark rm(THREAD);
3969     Exceptions::fthrow(
3970       THREAD_AND_LOCATION,
3971       vmSymbols::java_lang_ClassFormatError(),
3972       "Method %s in class %s has illegal modifiers: 0x%X",
3973       name->as_C_string(), _class_name->as_C_string(), flags);
3974     return;
3975   }
3976 }
3977 
3978 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
3979   assert(_need_verify, "only called when _need_verify is true");
3980   int i = 0;
3981   int count = length >> 2;
3982   for (int k=0; k<count; k++) {
3983     unsigned char b0 = buffer[i];
3984     unsigned char b1 = buffer[i+1];
3985     unsigned char b2 = buffer[i+2];
3986     unsigned char b3 = buffer[i+3];
3987     // For an unsigned char v,
3988     // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
3989     // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
3990     unsigned char res = b0 | b0 - 1 |
3991                         b1 | b1 - 1 |
3992                         b2 | b2 - 1 |
3993                         b3 | b3 - 1;
3994     if (res >= 128) break;
3995     i += 4;
3996   }
3997   for(; i < length; i++) {
3998     unsigned short c;
3999     // no embedded zeros
4000     guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4001     if(buffer[i] < 128) {
4002       continue;
4003     }
4004     if ((i + 5) < length) { // see if it's legal supplementary character
4005       if (UTF8::is_supplementary_character(&buffer[i])) {
4006         c = UTF8::get_supplementary_character(&buffer[i]);
4007         i += 5;
4008         continue;
4009       }
4010     }
4011     switch (buffer[i] >> 4) {
4012       default: break;
4013       case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4014         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4015       case 0xC: case 0xD:  // 110xxxxx  10xxxxxx
4016         c = (buffer[i] & 0x1F) << 6;
4017         i++;
4018         if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4019           c += buffer[i] & 0x3F;
4020           if (_major_version <= 47 || c == 0 || c >= 0x80) {
4021             // for classes with major > 47, c must a null or a character in its shortest form
4022             break;
4023           }
4024         }
4025         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4026       case 0xE:  // 1110xxxx 10xxxxxx 10xxxxxx
4027         c = (buffer[i] & 0xF) << 12;
4028         i += 2;
4029         if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4030           c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4031           if (_major_version <= 47 || c >= 0x800) {
4032             // for classes with major > 47, c must be in its shortest form
4033             break;
4034           }
4035         }
4036         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4037     }  // end of switch
4038   } // end of for
4039 }
4040 
4041 // Checks if name is a legal class name.
4042 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4043   if (!_need_verify || _relax_verify) { return; }
4044 
4045   char buf[fixed_buffer_size];
4046   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4047   unsigned int length = name->utf8_length();
4048   bool legal = false;
4049 
4050   if (length > 0) {
4051     char* p;
4052     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4053       p = skip_over_field_signature(bytes, false, length, CHECK);
4054       legal = (p != NULL) && ((p - bytes) == (int)length);
4055     } else if (_major_version < JAVA_1_5_VERSION) {
4056       if (bytes[0] != '<') {
4057         p = skip_over_field_name(bytes, true, length);
4058         legal = (p != NULL) && ((p - bytes) == (int)length);
4059       }
4060     } else {
4061       // 4900761: relax the constraints based on JSR202 spec
4062       // Class names may be drawn from the entire Unicode character set.
4063       // Identifiers between '/' must be unqualified names.
4064       // The utf8 string has been verified when parsing cpool entries.
4065       legal = verify_unqualified_name(bytes, length, LegalClass);
4066     }
4067   }
4068   if (!legal) {
4069     ResourceMark rm(THREAD);
4070     Exceptions::fthrow(
4071       THREAD_AND_LOCATION,
4072       vmSymbols::java_lang_ClassFormatError(),
4073       "Illegal class name \"%s\" in class file %s", bytes,
4074       _class_name->as_C_string()
4075     );
4076     return;
4077   }
4078 }
4079 
4080 // Checks if name is a legal field name.
4081 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4082   if (!_need_verify || _relax_verify) { return; }
4083 
4084   char buf[fixed_buffer_size];
4085   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4086   unsigned int length = name->utf8_length();
4087   bool legal = false;
4088 
4089   if (length > 0) {
4090     if (_major_version < JAVA_1_5_VERSION) {
4091       if (bytes[0] != '<') {
4092         char* p = skip_over_field_name(bytes, false, length);
4093         legal = (p != NULL) && ((p - bytes) == (int)length);
4094       }
4095     } else {
4096       // 4881221: relax the constraints based on JSR202 spec
4097       legal = verify_unqualified_name(bytes, length, LegalField);
4098     }
4099   }
4100 
4101   if (!legal) {
4102     ResourceMark rm(THREAD);
4103     Exceptions::fthrow(
4104       THREAD_AND_LOCATION,
4105       vmSymbols::java_lang_ClassFormatError(),
4106       "Illegal field name \"%s\" in class %s", bytes,
4107       _class_name->as_C_string()
4108     );
4109     return;
4110   }
4111 }
4112 
4113 // Checks if name is a legal method name.
4114 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4115   if (!_need_verify || _relax_verify) { return; }
4116 
4117   assert(name != NULL, "method name is null");
4118   char buf[fixed_buffer_size];
4119   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4120   unsigned int length = name->utf8_length();
4121   bool legal = false;
4122 
4123   if (length > 0) {
4124     if (bytes[0] == '<') {
4125       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4126         legal = true;
4127       }
4128     } else if (_major_version < JAVA_1_5_VERSION) {
4129       char* p;
4130       p = skip_over_field_name(bytes, false, length);
4131       legal = (p != NULL) && ((p - bytes) == (int)length);
4132     } else {
4133       // 4881221: relax the constraints based on JSR202 spec
4134       legal = verify_unqualified_name(bytes, length, LegalMethod);
4135     }
4136   }
4137 
4138   if (!legal) {
4139     ResourceMark rm(THREAD);
4140     Exceptions::fthrow(
4141       THREAD_AND_LOCATION,
4142       vmSymbols::java_lang_ClassFormatError(),
4143       "Illegal method name \"%s\" in class %s", bytes,
4144       _class_name->as_C_string()
4145     );
4146     return;
4147   }
4148 }
4149 
4150 
4151 // Checks if signature is a legal field signature.
4152 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4153   if (!_need_verify) { return; }
4154 
4155   char buf[fixed_buffer_size];
4156   char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4157   unsigned int length = signature->utf8_length();
4158   char* p = skip_over_field_signature(bytes, false, length, CHECK);
4159 
4160   if (p == NULL || (p - bytes) != (int)length) {
4161     throwIllegalSignature("Field", name, signature, CHECK);
4162   }
4163 }
4164 
4165 // Checks if signature is a legal method signature.
4166 // Returns number of parameters
4167 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4168   if (!_need_verify) {
4169     // make sure caller's args_size will be less than 0 even for non-static
4170     // method so it will be recomputed in compute_size_of_parameters().
4171     return -2;
4172   }
4173 
4174   unsigned int args_size = 0;
4175   char buf[fixed_buffer_size];
4176   char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4177   unsigned int length = signature->utf8_length();
4178   char* nextp;
4179 
4180   // The first character must be a '('
4181   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4182     length--;
4183     // Skip over legal field signatures
4184     nextp = skip_over_field_signature(p, false, length, CHECK_0);
4185     while ((length > 0) && (nextp != NULL)) {
4186       args_size++;
4187       if (p[0] == 'J' || p[0] == 'D') {
4188         args_size++;
4189       }
4190       length -= nextp - p;
4191       p = nextp;
4192       nextp = skip_over_field_signature(p, false, length, CHECK_0);
4193     }
4194     // The first non-signature thing better be a ')'
4195     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4196       length--;
4197       if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4198         // All internal methods must return void
4199         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4200           return args_size;
4201         }
4202       } else {
4203         // Now we better just have a return value
4204         nextp = skip_over_field_signature(p, true, length, CHECK_0);
4205         if (nextp && ((int)length == (nextp - p))) {
4206           return args_size;
4207         }
4208       }
4209     }
4210   }
4211   // Report error
4212   throwIllegalSignature("Method", name, signature, CHECK_0);
4213   return 0;
4214 }
4215 
4216 
4217 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4218 // Method names also may not contain the characters '<' or '>', unless <init>
4219 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
4220 // method.  Because these names have been checked as special cases before
4221 // calling this method in verify_legal_method_name.
4222 bool ClassFileParser::verify_unqualified_name(
4223     char* name, unsigned int length, int type) {
4224   jchar ch;
4225 
4226   for (char* p = name; p != name + length; ) {
4227     ch = *p;
4228     if (ch < 128) {
4229       p++;
4230       if (ch == '.' || ch == ';' || ch == '[' ) {
4231         return false;   // do not permit '.', ';', or '['
4232       }
4233       if (type != LegalClass && ch == '/') {
4234         return false;   // do not permit '/' unless it's class name
4235       }
4236       if (type == LegalMethod && (ch == '<' || ch == '>')) {
4237         return false;   // do not permit '<' or '>' in method names
4238       }
4239     } else {
4240       char* tmp_p = UTF8::next(p, &ch);
4241       p = tmp_p;
4242     }
4243   }
4244   return true;
4245 }
4246 
4247 
4248 // Take pointer to a string. Skip over the longest part of the string that could
4249 // be taken as a fieldname. Allow '/' if slash_ok is true.
4250 // Return a pointer to just past the fieldname.
4251 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4252 // being true, we saw consecutive slashes (meaning we were looking for a
4253 // qualified path but found something that was badly-formed).
4254 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4255   char* p;
4256   jchar ch;
4257   jboolean last_is_slash = false;
4258   jboolean not_first_ch = false;
4259 
4260   for (p = name; p != name + length; not_first_ch = true) {
4261     char* old_p = p;
4262     ch = *p;
4263     if (ch < 128) {
4264       p++;
4265       // quick check for ascii
4266       if ((ch >= 'a' && ch <= 'z') ||
4267           (ch >= 'A' && ch <= 'Z') ||
4268           (ch == '_' || ch == '$') ||
4269           (not_first_ch && ch >= '0' && ch <= '9')) {
4270         last_is_slash = false;
4271         continue;
4272       }
4273       if (slash_ok && ch == '/') {
4274         if (last_is_slash) {
4275           return NULL;  // Don't permit consecutive slashes
4276         }
4277         last_is_slash = true;
4278         continue;
4279       }
4280     } else {
4281       jint unicode_ch;
4282       char* tmp_p = UTF8::next_character(p, &unicode_ch);
4283       p = tmp_p;
4284       last_is_slash = false;
4285       // Check if ch is Java identifier start or is Java identifier part
4286       // 4672820: call java.lang.Character methods directly without generating separate tables.
4287       EXCEPTION_MARK;
4288       instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4289 
4290       // return value
4291       JavaValue result(T_BOOLEAN);
4292       // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4293       JavaCallArguments args;
4294       args.push_int(unicode_ch);
4295 
4296       // public static boolean isJavaIdentifierStart(char ch);
4297       JavaCalls::call_static(&result,
4298                              klass,
4299                              vmSymbols::isJavaIdentifierStart_name(),
4300                              vmSymbols::int_bool_signature(),
4301                              &args,
4302                              THREAD);
4303 
4304       if (HAS_PENDING_EXCEPTION) {
4305         CLEAR_PENDING_EXCEPTION;
4306         return 0;
4307       }
4308       if (result.get_jboolean()) {
4309         continue;
4310       }
4311 
4312       if (not_first_ch) {
4313         // public static boolean isJavaIdentifierPart(char ch);
4314         JavaCalls::call_static(&result,
4315                                klass,
4316                                vmSymbols::isJavaIdentifierPart_name(),
4317                                vmSymbols::int_bool_signature(),
4318                                &args,
4319                                THREAD);
4320 
4321         if (HAS_PENDING_EXCEPTION) {
4322           CLEAR_PENDING_EXCEPTION;
4323           return 0;
4324         }
4325 
4326         if (result.get_jboolean()) {
4327           continue;
4328         }
4329       }
4330     }
4331     return (not_first_ch) ? old_p : NULL;
4332   }
4333   return (not_first_ch) ? p : NULL;
4334 }
4335 
4336 
4337 // Take pointer to a string. Skip over the longest part of the string that could
4338 // be taken as a field signature. Allow "void" if void_ok.
4339 // Return a pointer to just past the signature.
4340 // Return NULL if no legal signature is found.
4341 char* ClassFileParser::skip_over_field_signature(char* signature,
4342                                                  bool void_ok,
4343                                                  unsigned int length,
4344                                                  TRAPS) {
4345   unsigned int array_dim = 0;
4346   while (length > 0) {
4347     switch (signature[0]) {
4348       case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4349       case JVM_SIGNATURE_BOOLEAN:
4350       case JVM_SIGNATURE_BYTE:
4351       case JVM_SIGNATURE_CHAR:
4352       case JVM_SIGNATURE_SHORT:
4353       case JVM_SIGNATURE_INT:
4354       case JVM_SIGNATURE_FLOAT:
4355       case JVM_SIGNATURE_LONG:
4356       case JVM_SIGNATURE_DOUBLE:
4357         return signature + 1;
4358       case JVM_SIGNATURE_CLASS: {
4359         if (_major_version < JAVA_1_5_VERSION) {
4360           // Skip over the class name if one is there
4361           char* p = skip_over_field_name(signature + 1, true, --length);
4362 
4363           // The next character better be a semicolon
4364           if (p && (p - signature) > 1 && p[0] == ';') {
4365             return p + 1;
4366           }
4367         } else {
4368           // 4900761: For class version > 48, any unicode is allowed in class name.
4369           length--;
4370           signature++;
4371           while (length > 0 && signature[0] != ';') {
4372             if (signature[0] == '.') {
4373               classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4374             }
4375             length--;
4376             signature++;
4377           }
4378           if (signature[0] == ';') { return signature + 1; }
4379         }
4380 
4381         return NULL;
4382       }
4383       case JVM_SIGNATURE_ARRAY:
4384         array_dim++;
4385         if (array_dim > 255) {
4386           // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4387           classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4388         }
4389         // The rest of what's there better be a legal signature
4390         signature++;
4391         length--;
4392         void_ok = false;
4393         break;
4394 
4395       default:
4396         return NULL;
4397     }
4398   }
4399   return NULL;
4400 }
--- EOF ---