1 /*
   2  * Copyright (c) 1997, 2012, 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(Handle class_loader, 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(class_loader, 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(class_loader, 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(Handle class_loader, 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(class_loader, 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   int total_fields = length + num_injected;
1086 
1087   // The field array starts with tuples of shorts
1088   // [access, name index, sig index, initial value index, byte offset].
1089   // A generic signature slot only exists for field with generic
1090   // signature attribute. And the access flag is set with
1091   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1092   // signature slots are at the end of the field array and after all
1093   // other fields data.
1094   //
1095   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1096   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1097   //       ...
1098   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1099   //       [generic signature index]
1100   //       [generic signature index]
1101   //       ...
1102   //
1103   // Allocate a temporary resource array for field data. For each field,
1104   // a slot is reserved in the temporary array for the generic signature
1105   // index. After parsing all fields, the data are copied to a permanent
1106   // array and any unused slots will be discarded.
1107   ResourceMark rm(THREAD);
1108   u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
1109              THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
1110 
1111   typeArrayHandle field_annotations;
1112   // The generic signature slots start after all other fields' data.
1113   int generic_signature_slot = total_fields * FieldInfo::field_slots;
1114   int num_generic_signature = 0;
1115   for (int n = 0; n < length; n++) {
1116     cfs->guarantee_more(8, CHECK_(nullHandle));  // access_flags, name_index, descriptor_index, attributes_count
1117 
1118     AccessFlags access_flags;
1119     jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1120     verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle));
1121     access_flags.set_flags(flags);
1122 
1123     u2 name_index = cfs->get_u2_fast();
1124     int cp_size = cp->length();
1125     check_property(
1126       valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1127       "Invalid constant pool index %u for field name in class file %s",
1128       name_index, CHECK_(nullHandle));
1129     Symbol*  name = cp->symbol_at(name_index);
1130     verify_legal_field_name(name, CHECK_(nullHandle));
1131 
1132     u2 signature_index = cfs->get_u2_fast();
1133     check_property(
1134       valid_cp_range(signature_index, cp_size) &&
1135         cp->tag_at(signature_index).is_utf8(),
1136       "Invalid constant pool index %u for field signature in class file %s",
1137       signature_index, CHECK_(nullHandle));
1138     Symbol*  sig = cp->symbol_at(signature_index);
1139     verify_legal_field_signature(name, sig, CHECK_(nullHandle));
1140 
1141     u2 constantvalue_index = 0;
1142     bool is_synthetic = false;
1143     u2 generic_signature_index = 0;
1144     bool is_static = access_flags.is_static();
1145 
1146     u2 attributes_count = cfs->get_u2_fast();
1147     if (attributes_count > 0) {
1148       parse_field_attributes(cp, attributes_count, is_static, signature_index,
1149                              &constantvalue_index, &is_synthetic,
1150                              &generic_signature_index, &field_annotations,
1151                              CHECK_(nullHandle));
1152       if (field_annotations.not_null()) {
1153         if (fields_annotations->is_null()) {
1154           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1155           *fields_annotations = objArrayHandle(THREAD, md);
1156         }
1157         (*fields_annotations)->obj_at_put(n, field_annotations());
1158       }
1159       if (is_synthetic) {
1160         access_flags.set_is_synthetic();
1161       }
1162       if (generic_signature_index != 0) {
1163         access_flags.set_field_has_generic_signature();
1164         fa[generic_signature_slot] = generic_signature_index;
1165         generic_signature_slot ++;
1166         num_generic_signature ++;
1167       }
1168     }
1169 
1170     FieldInfo* field = FieldInfo::from_field_array(fa, n);
1171     field->initialize(access_flags.as_short(),
1172                       name_index,
1173                       signature_index,
1174                       constantvalue_index,
1175                       0);
1176 
1177     BasicType type = cp->basic_type_for_signature_at(signature_index);
1178 
1179     // Remember how many oops we encountered and compute allocation type
1180     FieldAllocationType atype = fac->update(is_static, type);
1181 
1182     // The correct offset is computed later (all oop fields will be located together)
1183     // We temporarily store the allocation type in the offset field
1184     field->set_offset(atype);
1185   }
1186 
1187   int index = length;
1188   if (num_injected != 0) {
1189     for (int n = 0; n < num_injected; n++) {
1190       // Check for duplicates
1191       if (injected[n].may_be_java) {
1192         Symbol* name      = injected[n].name();
1193         Symbol* signature = injected[n].signature();
1194         bool duplicate = false;
1195         for (int i = 0; i < length; i++) {
1196           FieldInfo* f = FieldInfo::from_field_array(fa, i);
1197           if (name      == cp->symbol_at(f->name_index()) &&
1198               signature == cp->symbol_at(f->signature_index())) {
1199             // Symbol is desclared in Java so skip this one
1200             duplicate = true;
1201             break;
1202           }
1203         }
1204         if (duplicate) {
1205           // These will be removed from the field array at the end
1206           continue;
1207         }
1208       }
1209 
1210       // Injected field
1211       FieldInfo* field = FieldInfo::from_field_array(fa, index);
1212       field->initialize(JVM_ACC_FIELD_INTERNAL,
1213                         injected[n].name_index,
1214                         injected[n].signature_index,
1215                         0,
1216                         0);
1217 
1218       BasicType type = FieldType::basic_type(injected[n].signature());
1219 
1220       // Remember how many oops we encountered and compute allocation type
1221       FieldAllocationType atype = fac->update(false, type);
1222 
1223       // The correct offset is computed later (all oop fields will be located together)
1224       // We temporarily store the allocation type in the offset field
1225       field->set_offset(atype);
1226       index++;
1227     }
1228   }
1229 
1230   // Now copy the fields' data from the temporary resource array.
1231   // Sometimes injected fields already exist in the Java source so
1232   // the fields array could be too long.  In that case the
1233   // fields array is trimed. Also unused slots that were reserved
1234   // for generic signature indexes are discarded.
1235   typeArrayOop new_fields = oopFactory::new_permanent_shortArray(
1236     index * FieldInfo::field_slots + num_generic_signature,
1237     CHECK_(nullHandle));
1238   typeArrayHandle fields(THREAD, new_fields);
1239   {
1240     int i = 0;
1241     for (; i < index * FieldInfo::field_slots; i++) {
1242       new_fields->short_at_put(i, fa[i]);
1243     }
1244     for (int j = total_fields * FieldInfo::field_slots;
1245          j < generic_signature_slot; j++) {
1246       new_fields->short_at_put(i++, fa[j]);
1247     }
1248     assert(i == new_fields->length(), "");
1249   }
1250 
1251   if (_need_verify && length > 1) {
1252     // Check duplicated fields
1253     ResourceMark rm(THREAD);
1254     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1255       THREAD, NameSigHash*, HASH_ROW_SIZE);
1256     initialize_hashtable(names_and_sigs);
1257     bool dup = false;
1258     {
1259       debug_only(No_Safepoint_Verifier nsv;)
1260       for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
1261         Symbol* name = fs.name();
1262         Symbol* sig = fs.signature();
1263         // If no duplicates, add name/signature in hashtable names_and_sigs.
1264         if (!put_after_lookup(name, sig, names_and_sigs)) {
1265           dup = true;
1266           break;
1267         }
1268       }
1269     }
1270     if (dup) {
1271       classfile_parse_error("Duplicate field name&signature in class file %s",
1272                             CHECK_(nullHandle));
1273     }
1274   }
1275 
1276   return fields;
1277 }
1278 
1279 
1280 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1281   while (length-- > 0) {
1282     *dest++ = Bytes::get_Java_u2((u1*) (src++));
1283   }
1284 }
1285 
1286 
1287 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length,
1288                                                        u4 exception_table_length,
1289                                                        constantPoolHandle cp,
1290                                                        TRAPS) {
1291   ClassFileStream* cfs = stream();
1292   typeArrayHandle nullHandle;
1293 
1294   // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index]
1295   typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle));
1296   typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh);
1297 
1298   int index = 0;
1299   cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index
1300   for (unsigned int i = 0; i < exception_table_length; i++) {
1301     u2 start_pc = cfs->get_u2_fast();
1302     u2 end_pc = cfs->get_u2_fast();
1303     u2 handler_pc = cfs->get_u2_fast();
1304     u2 catch_type_index = cfs->get_u2_fast();
1305     // Will check legal target after parsing code array in verifier.
1306     if (_need_verify) {
1307       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1308                          "Illegal exception table range in class file %s", CHECK_(nullHandle));
1309       guarantee_property(handler_pc < code_length,
1310                          "Illegal exception table handler in class file %s", CHECK_(nullHandle));
1311       if (catch_type_index != 0) {
1312         guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1313                            is_klass_reference(cp, catch_type_index),
1314                            "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle));
1315       }
1316     }
1317     exception_handlers->int_at_put(index++, start_pc);
1318     exception_handlers->int_at_put(index++, end_pc);
1319     exception_handlers->int_at_put(index++, handler_pc);
1320     exception_handlers->int_at_put(index++, catch_type_index);
1321   }
1322   return exception_handlers;
1323 }
1324 
1325 void ClassFileParser::parse_linenumber_table(
1326     u4 code_attribute_length, u4 code_length,
1327     CompressedLineNumberWriteStream** write_stream, TRAPS) {
1328   ClassFileStream* cfs = stream();
1329   unsigned int num_entries = cfs->get_u2(CHECK);
1330 
1331   // Each entry is a u2 start_pc, and a u2 line_number
1332   unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1333 
1334   // Verify line number attribute and table length
1335   check_property(
1336     code_attribute_length == sizeof(u2) + length_in_bytes,
1337     "LineNumberTable attribute has wrong length in class file %s", CHECK);
1338 
1339   cfs->guarantee_more(length_in_bytes, CHECK);
1340 
1341   if ((*write_stream) == NULL) {
1342     if (length_in_bytes > fixed_buffer_size) {
1343       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1344     } else {
1345       (*write_stream) = new CompressedLineNumberWriteStream(
1346         linenumbertable_buffer, fixed_buffer_size);
1347     }
1348   }
1349 
1350   while (num_entries-- > 0) {
1351     u2 bci  = cfs->get_u2_fast(); // start_pc
1352     u2 line = cfs->get_u2_fast(); // line_number
1353     guarantee_property(bci < code_length,
1354         "Invalid pc in LineNumberTable in class file %s", CHECK);
1355     (*write_stream)->write_pair(bci, line);
1356   }
1357 }
1358 
1359 
1360 // Class file LocalVariableTable elements.
1361 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1362  public:
1363   u2 start_bci;
1364   u2 length;
1365   u2 name_cp_index;
1366   u2 descriptor_cp_index;
1367   u2 slot;
1368 };
1369 
1370 
1371 class LVT_Hash: public CHeapObj<mtClass> {
1372  public:
1373   LocalVariableTableElement  *_elem;  // element
1374   LVT_Hash*                   _next;  // Next entry in hash table
1375 };
1376 
1377 unsigned int hash(LocalVariableTableElement *elem) {
1378   unsigned int raw_hash = elem->start_bci;
1379 
1380   raw_hash = elem->length        + raw_hash * 37;
1381   raw_hash = elem->name_cp_index + raw_hash * 37;
1382   raw_hash = elem->slot          + raw_hash * 37;
1383 
1384   return raw_hash % HASH_ROW_SIZE;
1385 }
1386 
1387 void initialize_hashtable(LVT_Hash** table) {
1388   for (int i = 0; i < HASH_ROW_SIZE; i++) {
1389     table[i] = NULL;
1390   }
1391 }
1392 
1393 void clear_hashtable(LVT_Hash** table) {
1394   for (int i = 0; i < HASH_ROW_SIZE; i++) {
1395     LVT_Hash* current = table[i];
1396     LVT_Hash* next;
1397     while (current != NULL) {
1398       next = current->_next;
1399       current->_next = NULL;
1400       delete(current);
1401       current = next;
1402     }
1403     table[i] = NULL;
1404   }
1405 }
1406 
1407 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1408   LVT_Hash* entry = table[index];
1409 
1410   /*
1411    * 3-tuple start_bci/length/slot has to be unique key,
1412    * so the following comparison seems to be redundant:
1413    *       && elem->name_cp_index == entry->_elem->name_cp_index
1414    */
1415   while (entry != NULL) {
1416     if (elem->start_bci           == entry->_elem->start_bci
1417      && elem->length              == entry->_elem->length
1418      && elem->name_cp_index       == entry->_elem->name_cp_index
1419      && elem->slot                == entry->_elem->slot
1420     ) {
1421       return entry;
1422     }
1423     entry = entry->_next;
1424   }
1425   return NULL;
1426 }
1427 
1428 // Return false if the local variable is found in table.
1429 // Return true if no duplicate is found.
1430 // And local variable is added as a new entry in table.
1431 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1432   // First lookup for duplicates
1433   int index = hash(elem);
1434   LVT_Hash* entry = LVT_lookup(elem, index, table);
1435 
1436   if (entry != NULL) {
1437       return false;
1438   }
1439   // No duplicate is found, allocate a new entry and fill it.
1440   if ((entry = new LVT_Hash()) == NULL) {
1441     return false;
1442   }
1443   entry->_elem = elem;
1444 
1445   // Insert into hash table
1446   entry->_next = table[index];
1447   table[index] = entry;
1448 
1449   return true;
1450 }
1451 
1452 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1453   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
1454   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
1455   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1456   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1457   lvt->signature_cp_index  = 0;
1458   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
1459 }
1460 
1461 // Function is used to parse both attributes:
1462 //       LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1463 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1464                                                u2 max_locals,
1465                                                u4 code_attribute_length,
1466                                                constantPoolHandle cp,
1467                                                u2* localvariable_table_length,
1468                                                bool isLVTT,
1469                                                TRAPS) {
1470   ClassFileStream* cfs = stream();
1471   const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1472   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1473   unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1474   // Verify local variable table attribute has right length
1475   if (_need_verify) {
1476     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1477                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1478   }
1479   u2* localvariable_table_start = cfs->get_u2_buffer();
1480   assert(localvariable_table_start != NULL, "null local variable table");
1481   if (!_need_verify) {
1482     cfs->skip_u2_fast(size);
1483   } else {
1484     cfs->guarantee_more(size * 2, CHECK_NULL);
1485     for(int i = 0; i < (*localvariable_table_length); i++) {
1486       u2 start_pc = cfs->get_u2_fast();
1487       u2 length = cfs->get_u2_fast();
1488       u2 name_index = cfs->get_u2_fast();
1489       u2 descriptor_index = cfs->get_u2_fast();
1490       u2 index = cfs->get_u2_fast();
1491       // Assign to a u4 to avoid overflow
1492       u4 end_pc = (u4)start_pc + (u4)length;
1493 
1494       if (start_pc >= code_length) {
1495         classfile_parse_error(
1496           "Invalid start_pc %u in %s in class file %s",
1497           start_pc, tbl_name, CHECK_NULL);
1498       }
1499       if (end_pc > code_length) {
1500         classfile_parse_error(
1501           "Invalid length %u in %s in class file %s",
1502           length, tbl_name, CHECK_NULL);
1503       }
1504       int cp_size = cp->length();
1505       guarantee_property(
1506         valid_cp_range(name_index, cp_size) &&
1507           cp->tag_at(name_index).is_utf8(),
1508         "Name index %u in %s has bad constant type in class file %s",
1509         name_index, tbl_name, CHECK_NULL);
1510       guarantee_property(
1511         valid_cp_range(descriptor_index, cp_size) &&
1512           cp->tag_at(descriptor_index).is_utf8(),
1513         "Signature index %u in %s has bad constant type in class file %s",
1514         descriptor_index, tbl_name, CHECK_NULL);
1515 
1516       Symbol*  name = cp->symbol_at(name_index);
1517       Symbol*  sig = cp->symbol_at(descriptor_index);
1518       verify_legal_field_name(name, CHECK_NULL);
1519       u2 extra_slot = 0;
1520       if (!isLVTT) {
1521         verify_legal_field_signature(name, sig, CHECK_NULL);
1522 
1523         // 4894874: check special cases for double and long local variables
1524         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1525             sig == vmSymbols::type_signature(T_LONG)) {
1526           extra_slot = 1;
1527         }
1528       }
1529       guarantee_property((index + extra_slot) < max_locals,
1530                           "Invalid index %u in %s in class file %s",
1531                           index, tbl_name, CHECK_NULL);
1532     }
1533   }
1534   return localvariable_table_start;
1535 }
1536 
1537 
1538 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1539                                       u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1540   ClassFileStream* cfs = stream();
1541   u2 index = 0; // index in the array with long/double occupying two slots
1542   u4 i1 = *u1_index;
1543   u4 i2 = *u2_index + 1;
1544   for(int i = 0; i < array_length; i++) {
1545     u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1546     index++;
1547     if (tag == ITEM_Long || tag == ITEM_Double) {
1548       index++;
1549     } else if (tag == ITEM_Object) {
1550       u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1551       guarantee_property(valid_cp_range(class_index, cp->length()) &&
1552                          is_klass_reference(cp, class_index),
1553                          "Bad class index %u in StackMap in class file %s",
1554                          class_index, CHECK);
1555     } else if (tag == ITEM_Uninitialized) {
1556       u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1557       guarantee_property(
1558         offset < code_length,
1559         "Bad uninitialized type offset %u in StackMap in class file %s",
1560         offset, CHECK);
1561     } else {
1562       guarantee_property(
1563         tag <= (u1)ITEM_Uninitialized,
1564         "Unknown variable type %u in StackMap in class file %s",
1565         tag, CHECK);
1566     }
1567   }
1568   u2_array[*u2_index] = index;
1569   *u1_index = i1;
1570   *u2_index = i2;
1571 }
1572 
1573 typeArrayOop ClassFileParser::parse_stackmap_table(
1574     u4 code_attribute_length, TRAPS) {
1575   if (code_attribute_length == 0)
1576     return NULL;
1577 
1578   ClassFileStream* cfs = stream();
1579   u1* stackmap_table_start = cfs->get_u1_buffer();
1580   assert(stackmap_table_start != NULL, "null stackmap table");
1581 
1582   // check code_attribute_length first
1583   stream()->skip_u1(code_attribute_length, CHECK_NULL);
1584 
1585   if (!_need_verify && !DumpSharedSpaces) {
1586     return NULL;
1587   }
1588 
1589   typeArrayOop stackmap_data =
1590     oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
1591 
1592   stackmap_data->set_length(code_attribute_length);
1593   memcpy((void*)stackmap_data->byte_at_addr(0),
1594          (void*)stackmap_table_start, code_attribute_length);
1595   return stackmap_data;
1596 }
1597 
1598 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1599                                               u4 method_attribute_length,
1600                                               constantPoolHandle cp, TRAPS) {
1601   ClassFileStream* cfs = stream();
1602   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
1603   *checked_exceptions_length = cfs->get_u2_fast();
1604   unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1605   u2* checked_exceptions_start = cfs->get_u2_buffer();
1606   assert(checked_exceptions_start != NULL, "null checked exceptions");
1607   if (!_need_verify) {
1608     cfs->skip_u2_fast(size);
1609   } else {
1610     // Verify each value in the checked exception table
1611     u2 checked_exception;
1612     u2 len = *checked_exceptions_length;
1613     cfs->guarantee_more(2 * len, CHECK_NULL);
1614     for (int i = 0; i < len; i++) {
1615       checked_exception = cfs->get_u2_fast();
1616       check_property(
1617         valid_cp_range(checked_exception, cp->length()) &&
1618         is_klass_reference(cp, checked_exception),
1619         "Exception name has bad type at constant pool %u in class file %s",
1620         checked_exception, CHECK_NULL);
1621     }
1622   }
1623   // check exceptions attribute length
1624   if (_need_verify) {
1625     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1626                                                    sizeof(u2) * size),
1627                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1628   }
1629   return checked_exceptions_start;
1630 }
1631 
1632 void ClassFileParser::throwIllegalSignature(
1633     const char* type, Symbol* name, Symbol* sig, TRAPS) {
1634   ResourceMark rm(THREAD);
1635   Exceptions::fthrow(THREAD_AND_LOCATION,
1636       vmSymbols::java_lang_ClassFormatError(),
1637       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1638       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1639 }
1640 
1641 #define MAX_ARGS_SIZE 255
1642 #define MAX_CODE_SIZE 65535
1643 #define INITIAL_MAX_LVT_NUMBER 256
1644 
1645 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1646 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the
1647 // methodOop to save footprint, so we only know the size of the resulting methodOop when the
1648 // entire method attribute is parsed.
1649 //
1650 // The promoted_flags parameter is used to pass relevant access_flags
1651 // from the method back up to the containing klass. These flag values
1652 // are added to klass's access_flags.
1653 
1654 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface,
1655                                            AccessFlags *promoted_flags,
1656                                            typeArrayHandle* method_annotations,
1657                                            typeArrayHandle* method_parameter_annotations,
1658                                            typeArrayHandle* method_default_annotations,
1659                                            TRAPS) {
1660   ClassFileStream* cfs = stream();
1661   methodHandle nullHandle;
1662   ResourceMark rm(THREAD);
1663   // Parse fixed parts
1664   cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1665 
1666   int flags = cfs->get_u2_fast();
1667   u2 name_index = cfs->get_u2_fast();
1668   int cp_size = cp->length();
1669   check_property(
1670     valid_cp_range(name_index, cp_size) &&
1671       cp->tag_at(name_index).is_utf8(),
1672     "Illegal constant pool index %u for method name in class file %s",
1673     name_index, CHECK_(nullHandle));
1674   Symbol*  name = cp->symbol_at(name_index);
1675   verify_legal_method_name(name, CHECK_(nullHandle));
1676 
1677   u2 signature_index = cfs->get_u2_fast();
1678   guarantee_property(
1679     valid_cp_range(signature_index, cp_size) &&
1680       cp->tag_at(signature_index).is_utf8(),
1681     "Illegal constant pool index %u for method signature in class file %s",
1682     signature_index, CHECK_(nullHandle));
1683   Symbol*  signature = cp->symbol_at(signature_index);
1684 
1685   AccessFlags access_flags;
1686   if (name == vmSymbols::class_initializer_name()) {
1687     // We ignore the other access flags for a valid class initializer.
1688     // (JVM Spec 2nd ed., chapter 4.6)
1689     if (_major_version < 51) { // backward compatibility
1690       flags = JVM_ACC_STATIC;
1691     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
1692       flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
1693     }
1694   } else {
1695     verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1696   }
1697 
1698   int args_size = -1;  // only used when _need_verify is true
1699   if (_need_verify) {
1700     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1701                  verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1702     if (args_size > MAX_ARGS_SIZE) {
1703       classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1704     }
1705   }
1706 
1707   access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1708 
1709   // Default values for code and exceptions attribute elements
1710   u2 max_stack = 0;
1711   u2 max_locals = 0;
1712   u4 code_length = 0;
1713   u1* code_start = 0;
1714   u2 exception_table_length = 0;
1715   typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1716   u2 checked_exceptions_length = 0;
1717   u2* checked_exceptions_start = NULL;
1718   CompressedLineNumberWriteStream* linenumber_table = NULL;
1719   int linenumber_table_length = 0;
1720   int total_lvt_length = 0;
1721   u2 lvt_cnt = 0;
1722   u2 lvtt_cnt = 0;
1723   bool lvt_allocated = false;
1724   u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1725   u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1726   u2* localvariable_table_length;
1727   u2** localvariable_table_start;
1728   u2* localvariable_type_table_length;
1729   u2** localvariable_type_table_start;
1730   bool parsed_code_attribute = false;
1731   bool parsed_checked_exceptions_attribute = false;
1732   bool parsed_stackmap_attribute = false;
1733   // stackmap attribute - JDK1.5
1734   typeArrayHandle stackmap_data;
1735   u2 generic_signature_index = 0;
1736   u1* runtime_visible_annotations = NULL;
1737   int runtime_visible_annotations_length = 0;
1738   u1* runtime_invisible_annotations = NULL;
1739   int runtime_invisible_annotations_length = 0;
1740   u1* runtime_visible_parameter_annotations = NULL;
1741   int runtime_visible_parameter_annotations_length = 0;
1742   u1* runtime_invisible_parameter_annotations = NULL;
1743   int runtime_invisible_parameter_annotations_length = 0;
1744   u1* annotation_default = NULL;
1745   int annotation_default_length = 0;
1746 
1747   // Parse code and exceptions attribute
1748   u2 method_attributes_count = cfs->get_u2_fast();
1749   while (method_attributes_count--) {
1750     cfs->guarantee_more(6, CHECK_(nullHandle));  // method_attribute_name_index, method_attribute_length
1751     u2 method_attribute_name_index = cfs->get_u2_fast();
1752     u4 method_attribute_length = cfs->get_u4_fast();
1753     check_property(
1754       valid_cp_range(method_attribute_name_index, cp_size) &&
1755         cp->tag_at(method_attribute_name_index).is_utf8(),
1756       "Invalid method attribute name index %u in class file %s",
1757       method_attribute_name_index, CHECK_(nullHandle));
1758 
1759     Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index);
1760     if (method_attribute_name == vmSymbols::tag_code()) {
1761       // Parse Code attribute
1762       if (_need_verify) {
1763         guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1764                         "Code attribute in native or abstract methods in class file %s",
1765                          CHECK_(nullHandle));
1766       }
1767       if (parsed_code_attribute) {
1768         classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1769       }
1770       parsed_code_attribute = true;
1771 
1772       // Stack size, locals size, and code size
1773       if (_major_version == 45 && _minor_version <= 2) {
1774         cfs->guarantee_more(4, CHECK_(nullHandle));
1775         max_stack = cfs->get_u1_fast();
1776         max_locals = cfs->get_u1_fast();
1777         code_length = cfs->get_u2_fast();
1778       } else {
1779         cfs->guarantee_more(8, CHECK_(nullHandle));
1780         max_stack = cfs->get_u2_fast();
1781         max_locals = cfs->get_u2_fast();
1782         code_length = cfs->get_u4_fast();
1783       }
1784       if (_need_verify) {
1785         guarantee_property(args_size <= max_locals,
1786                            "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1787         guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1788                            "Invalid method Code length %u in class file %s",
1789                            code_length, CHECK_(nullHandle));
1790       }
1791       // Code pointer
1792       code_start = cfs->get_u1_buffer();
1793       assert(code_start != NULL, "null code start");
1794       cfs->guarantee_more(code_length, CHECK_(nullHandle));
1795       cfs->skip_u1_fast(code_length);
1796 
1797       // Exception handler table
1798       cfs->guarantee_more(2, CHECK_(nullHandle));  // exception_table_length
1799       exception_table_length = cfs->get_u2_fast();
1800       if (exception_table_length > 0) {
1801         exception_handlers =
1802               parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle));
1803       }
1804 
1805       // Parse additional attributes in code attribute
1806       cfs->guarantee_more(2, CHECK_(nullHandle));  // code_attributes_count
1807       u2 code_attributes_count = cfs->get_u2_fast();
1808 
1809       unsigned int calculated_attribute_length = 0;
1810 
1811       if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
1812         calculated_attribute_length =
1813             sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
1814       } else {
1815         // max_stack, locals and length are smaller in pre-version 45.2 classes
1816         calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
1817       }
1818       calculated_attribute_length +=
1819         code_length +
1820         sizeof(exception_table_length) +
1821         sizeof(code_attributes_count) +
1822         exception_table_length *
1823             ( sizeof(u2) +   // start_pc
1824               sizeof(u2) +   // end_pc
1825               sizeof(u2) +   // handler_pc
1826               sizeof(u2) );  // catch_type_index
1827 
1828       while (code_attributes_count--) {
1829         cfs->guarantee_more(6, CHECK_(nullHandle));  // code_attribute_name_index, code_attribute_length
1830         u2 code_attribute_name_index = cfs->get_u2_fast();
1831         u4 code_attribute_length = cfs->get_u4_fast();
1832         calculated_attribute_length += code_attribute_length +
1833                                        sizeof(code_attribute_name_index) +
1834                                        sizeof(code_attribute_length);
1835         check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
1836                        cp->tag_at(code_attribute_name_index).is_utf8(),
1837                        "Invalid code attribute name index %u in class file %s",
1838                        code_attribute_name_index,
1839                        CHECK_(nullHandle));
1840         if (LoadLineNumberTables &&
1841             cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
1842           // Parse and compress line number table
1843           parse_linenumber_table(code_attribute_length, code_length,
1844             &linenumber_table, CHECK_(nullHandle));
1845 
1846         } else if (LoadLocalVariableTables &&
1847                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
1848           // Parse local variable table
1849           if (!lvt_allocated) {
1850             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1851               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
1852             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1853               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1854             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1855               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
1856             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1857               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1858             lvt_allocated = true;
1859           }
1860           if (lvt_cnt == max_lvt_cnt) {
1861             max_lvt_cnt <<= 1;
1862             REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
1863             REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
1864           }
1865           localvariable_table_start[lvt_cnt] =
1866             parse_localvariable_table(code_length,
1867                                       max_locals,
1868                                       code_attribute_length,
1869                                       cp,
1870                                       &localvariable_table_length[lvt_cnt],
1871                                       false,    // is not LVTT
1872                                       CHECK_(nullHandle));
1873           total_lvt_length += localvariable_table_length[lvt_cnt];
1874           lvt_cnt++;
1875         } else if (LoadLocalVariableTypeTables &&
1876                    _major_version >= JAVA_1_5_VERSION &&
1877                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
1878           if (!lvt_allocated) {
1879             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1880               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
1881             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1882               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1883             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1884               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
1885             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1886               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1887             lvt_allocated = true;
1888           }
1889           // Parse local variable type table
1890           if (lvtt_cnt == max_lvtt_cnt) {
1891             max_lvtt_cnt <<= 1;
1892             REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
1893             REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
1894           }
1895           localvariable_type_table_start[lvtt_cnt] =
1896             parse_localvariable_table(code_length,
1897                                       max_locals,
1898                                       code_attribute_length,
1899                                       cp,
1900                                       &localvariable_type_table_length[lvtt_cnt],
1901                                       true,     // is LVTT
1902                                       CHECK_(nullHandle));
1903           lvtt_cnt++;
1904         } else if (UseSplitVerifier &&
1905                    _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
1906                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
1907           // Stack map is only needed by the new verifier in JDK1.5.
1908           if (parsed_stackmap_attribute) {
1909             classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
1910           }
1911           typeArrayOop sm =
1912             parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
1913           stackmap_data = typeArrayHandle(THREAD, sm);
1914           parsed_stackmap_attribute = true;
1915         } else {
1916           // Skip unknown attributes
1917           cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
1918         }
1919       }
1920       // check method attribute length
1921       if (_need_verify) {
1922         guarantee_property(method_attribute_length == calculated_attribute_length,
1923                            "Code segment has wrong length in class file %s", CHECK_(nullHandle));
1924       }
1925     } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
1926       // Parse Exceptions attribute
1927       if (parsed_checked_exceptions_attribute) {
1928         classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
1929       }
1930       parsed_checked_exceptions_attribute = true;
1931       checked_exceptions_start =
1932             parse_checked_exceptions(&checked_exceptions_length,
1933                                      method_attribute_length,
1934                                      cp, CHECK_(nullHandle));
1935     } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
1936       if (method_attribute_length != 0) {
1937         classfile_parse_error(
1938           "Invalid Synthetic method attribute length %u in class file %s",
1939           method_attribute_length, CHECK_(nullHandle));
1940       }
1941       // Should we check that there hasn't already been a synthetic attribute?
1942       access_flags.set_is_synthetic();
1943     } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1944       if (method_attribute_length != 0) {
1945         classfile_parse_error(
1946           "Invalid Deprecated method attribute length %u in class file %s",
1947           method_attribute_length, CHECK_(nullHandle));
1948       }
1949     } else if (_major_version >= JAVA_1_5_VERSION) {
1950       if (method_attribute_name == vmSymbols::tag_signature()) {
1951         if (method_attribute_length != 2) {
1952           classfile_parse_error(
1953             "Invalid Signature attribute length %u in class file %s",
1954             method_attribute_length, CHECK_(nullHandle));
1955         }
1956         cfs->guarantee_more(2, CHECK_(nullHandle));  // generic_signature_index
1957         generic_signature_index = cfs->get_u2_fast();
1958       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1959         runtime_visible_annotations_length = method_attribute_length;
1960         runtime_visible_annotations = cfs->get_u1_buffer();
1961         assert(runtime_visible_annotations != NULL, "null visible annotations");
1962         cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
1963       } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1964         runtime_invisible_annotations_length = method_attribute_length;
1965         runtime_invisible_annotations = cfs->get_u1_buffer();
1966         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1967         cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
1968       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
1969         runtime_visible_parameter_annotations_length = method_attribute_length;
1970         runtime_visible_parameter_annotations = cfs->get_u1_buffer();
1971         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
1972         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
1973       } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
1974         runtime_invisible_parameter_annotations_length = method_attribute_length;
1975         runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
1976         assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
1977         cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
1978       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
1979         annotation_default_length = method_attribute_length;
1980         annotation_default = cfs->get_u1_buffer();
1981         assert(annotation_default != NULL, "null annotation default");
1982         cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
1983       } else {
1984         // Skip unknown attributes
1985         cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1986       }
1987     } else {
1988       // Skip unknown attributes
1989       cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1990     }
1991   }
1992 
1993   if (linenumber_table != NULL) {
1994     linenumber_table->write_terminator();
1995     linenumber_table_length = linenumber_table->position();
1996   }
1997 
1998   // Make sure there's at least one Code attribute in non-native/non-abstract method
1999   if (_need_verify) {
2000     guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
2001                       "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
2002   }
2003 
2004   // All sizing information for a methodOop is finally available, now create it
2005   methodOop m_oop  = oopFactory::new_method(code_length, access_flags, linenumber_table_length,
2006                                             total_lvt_length, checked_exceptions_length,
2007                                             oopDesc::IsSafeConc, CHECK_(nullHandle));
2008   methodHandle m (THREAD, m_oop);
2009 
2010   ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize);
2011 
2012   // Fill in information from fixed part (access_flags already set)
2013   m->set_constants(cp());
2014   m->set_name_index(name_index);
2015   m->set_signature_index(signature_index);
2016   m->set_generic_signature_index(generic_signature_index);
2017 #ifdef CC_INTERP
2018   // hmm is there a gc issue here??
2019   ResultTypeFinder rtf(cp->symbol_at(signature_index));
2020   m->set_result_index(rtf.type());
2021 #endif
2022 
2023   if (args_size >= 0) {
2024     m->set_size_of_parameters(args_size);
2025   } else {
2026     m->compute_size_of_parameters(THREAD);
2027   }
2028 #ifdef ASSERT
2029   if (args_size >= 0) {
2030     m->compute_size_of_parameters(THREAD);
2031     assert(args_size == m->size_of_parameters(), "");
2032   }
2033 #endif
2034 
2035   // Fill in code attribute information
2036   m->set_max_stack(max_stack);
2037   m->set_max_locals(max_locals);
2038   m->constMethod()->set_stackmap_data(stackmap_data());
2039 
2040   /**
2041    * The exception_table field is the flag used to indicate
2042    * that the methodOop and it's associated constMethodOop are partially
2043    * initialized and thus are exempt from pre/post GC verification.  Once
2044    * the field is set, the oops are considered fully initialized so make
2045    * sure that the oops can pass verification when this field is set.
2046    */
2047   m->set_exception_table(exception_handlers());
2048 
2049   // Copy byte codes
2050   m->set_code(code_start);
2051 
2052   // Copy line number table
2053   if (linenumber_table != NULL) {
2054     memcpy(m->compressed_linenumber_table(),
2055            linenumber_table->buffer(), linenumber_table_length);
2056   }
2057 
2058   // Copy checked exceptions
2059   if (checked_exceptions_length > 0) {
2060     int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2061     copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
2062   }
2063 
2064   /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2065    *
2066    * Rules for LVT's and LVTT's are:
2067    *   - There can be any number of LVT's and LVTT's.
2068    *   - If there are n LVT's, it is the same as if there was just
2069    *     one LVT containing all the entries from the n LVT's.
2070    *   - There may be no more than one LVT entry per local variable.
2071    *     Two LVT entries are 'equal' if these fields are the same:
2072    *        start_pc, length, name, slot
2073    *   - There may be no more than one LVTT entry per each LVT entry.
2074    *     Each LVTT entry has to match some LVT entry.
2075    *   - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2076    */
2077   if (total_lvt_length > 0) {
2078     int tbl_no, idx;
2079 
2080     promoted_flags->set_has_localvariable_table();
2081 
2082     LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
2083     initialize_hashtable(lvt_Hash);
2084 
2085     // To fill LocalVariableTable in
2086     Classfile_LVT_Element*  cf_lvt;
2087     LocalVariableTableElement* lvt = m->localvariable_table_start();
2088 
2089     for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2090       cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2091       for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2092         copy_lvt_element(&cf_lvt[idx], lvt);
2093         // If no duplicates, add LVT elem in hashtable lvt_Hash.
2094         if (LVT_put_after_lookup(lvt, lvt_Hash) == false
2095           && _need_verify
2096           && _major_version >= JAVA_1_5_VERSION ) {
2097           clear_hashtable(lvt_Hash);
2098           classfile_parse_error("Duplicated LocalVariableTable attribute "
2099                                 "entry for '%s' in class file %s",
2100                                  cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2101                                  CHECK_(nullHandle));
2102         }
2103       }
2104     }
2105 
2106     // To merge LocalVariableTable and LocalVariableTypeTable
2107     Classfile_LVT_Element* cf_lvtt;
2108     LocalVariableTableElement lvtt_elem;
2109 
2110     for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2111       cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2112       for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2113         copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2114         int index = hash(&lvtt_elem);
2115         LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
2116         if (entry == NULL) {
2117           if (_need_verify) {
2118             clear_hashtable(lvt_Hash);
2119             classfile_parse_error("LVTT entry for '%s' in class file %s "
2120                                   "does not match any LVT entry",
2121                                    cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2122                                    CHECK_(nullHandle));
2123           }
2124         } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
2125           clear_hashtable(lvt_Hash);
2126           classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2127                                 "entry for '%s' in class file %s",
2128                                  cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2129                                  CHECK_(nullHandle));
2130         } else {
2131           // to add generic signatures into LocalVariableTable
2132           entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
2133         }
2134       }
2135     }
2136     clear_hashtable(lvt_Hash);
2137   }
2138 
2139   *method_annotations = assemble_annotations(runtime_visible_annotations,
2140                                              runtime_visible_annotations_length,
2141                                              runtime_invisible_annotations,
2142                                              runtime_invisible_annotations_length,
2143                                              CHECK_(nullHandle));
2144   *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
2145                                                        runtime_visible_parameter_annotations_length,
2146                                                        runtime_invisible_parameter_annotations,
2147                                                        runtime_invisible_parameter_annotations_length,
2148                                                        CHECK_(nullHandle));
2149   *method_default_annotations = assemble_annotations(annotation_default,
2150                                                      annotation_default_length,
2151                                                      NULL,
2152                                                      0,
2153                                                      CHECK_(nullHandle));
2154 
2155   if (name == vmSymbols::finalize_method_name() &&
2156       signature == vmSymbols::void_method_signature()) {
2157     if (m->is_empty_method()) {
2158       _has_empty_finalizer = true;
2159     } else {
2160       _has_finalizer = true;
2161     }
2162   }
2163   if (name == vmSymbols::object_initializer_name() &&
2164       signature == vmSymbols::void_method_signature() &&
2165       m->is_vanilla_constructor()) {
2166     _has_vanilla_constructor = true;
2167   }
2168 
2169   if (EnableInvokeDynamic && (m->is_method_handle_invoke() ||
2170                               m->is_method_handle_adapter())) {
2171     THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
2172                "Method handle invokers must be defined internally to the VM", nullHandle);
2173   }
2174 
2175   return m;
2176 }
2177 
2178 
2179 // The promoted_flags parameter is used to pass relevant access_flags
2180 // from the methods back up to the containing klass. These flag values
2181 // are added to klass's access_flags.
2182 
2183 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
2184                                               AccessFlags* promoted_flags,
2185                                               bool* has_final_method,
2186                                               objArrayOop* methods_annotations_oop,
2187                                               objArrayOop* methods_parameter_annotations_oop,
2188                                               objArrayOop* methods_default_annotations_oop,
2189                                               TRAPS) {
2190   ClassFileStream* cfs = stream();
2191   objArrayHandle nullHandle;
2192   typeArrayHandle method_annotations;
2193   typeArrayHandle method_parameter_annotations;
2194   typeArrayHandle method_default_annotations;
2195   cfs->guarantee_more(2, CHECK_(nullHandle));  // length
2196   u2 length = cfs->get_u2_fast();
2197   if (length == 0) {
2198     return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2199   } else {
2200     objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2201     objArrayHandle methods(THREAD, m);
2202     HandleMark hm(THREAD);
2203     objArrayHandle methods_annotations;
2204     objArrayHandle methods_parameter_annotations;
2205     objArrayHandle methods_default_annotations;
2206     for (int index = 0; index < length; index++) {
2207       methodHandle method = parse_method(cp, is_interface,
2208                                          promoted_flags,
2209                                          &method_annotations,
2210                                          &method_parameter_annotations,
2211                                          &method_default_annotations,
2212                                          CHECK_(nullHandle));
2213       if (method->is_final()) {
2214         *has_final_method = true;
2215       }
2216       methods->obj_at_put(index, method());
2217       if (method_annotations.not_null()) {
2218         if (methods_annotations.is_null()) {
2219           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2220           methods_annotations = objArrayHandle(THREAD, md);
2221         }
2222         methods_annotations->obj_at_put(index, method_annotations());
2223       }
2224       if (method_parameter_annotations.not_null()) {
2225         if (methods_parameter_annotations.is_null()) {
2226           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2227           methods_parameter_annotations = objArrayHandle(THREAD, md);
2228         }
2229         methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
2230       }
2231       if (method_default_annotations.not_null()) {
2232         if (methods_default_annotations.is_null()) {
2233           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
2234           methods_default_annotations = objArrayHandle(THREAD, md);
2235         }
2236         methods_default_annotations->obj_at_put(index, method_default_annotations());
2237       }
2238     }
2239     if (_need_verify && length > 1) {
2240       // Check duplicated methods
2241       ResourceMark rm(THREAD);
2242       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2243         THREAD, NameSigHash*, HASH_ROW_SIZE);
2244       initialize_hashtable(names_and_sigs);
2245       bool dup = false;
2246       {
2247         debug_only(No_Safepoint_Verifier nsv;)
2248         for (int i = 0; i < length; i++) {
2249           methodOop m = (methodOop)methods->obj_at(i);
2250           // If no duplicates, add name/signature in hashtable names_and_sigs.
2251           if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2252             dup = true;
2253             break;
2254           }
2255         }
2256       }
2257       if (dup) {
2258         classfile_parse_error("Duplicate method name&signature in class file %s",
2259                               CHECK_(nullHandle));
2260       }
2261     }
2262 
2263     *methods_annotations_oop = methods_annotations();
2264     *methods_parameter_annotations_oop = methods_parameter_annotations();
2265     *methods_default_annotations_oop = methods_default_annotations();
2266 
2267     return methods;
2268   }
2269 }
2270 
2271 
2272 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
2273                                               objArrayHandle methods_annotations,
2274                                               objArrayHandle methods_parameter_annotations,
2275                                               objArrayHandle methods_default_annotations,
2276                                               TRAPS) {
2277   typeArrayHandle nullHandle;
2278   int length = methods()->length();
2279   // If JVMTI original method ordering or sharing is enabled we have to
2280   // remember the original class file ordering.
2281   // We temporarily use the vtable_index field in the methodOop to store the
2282   // class file index, so we can read in after calling qsort.
2283   // Put the method ordering in the shared archive.
2284   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2285     for (int index = 0; index < length; index++) {
2286       methodOop m = methodOop(methods->obj_at(index));
2287       assert(!m->valid_vtable_index(), "vtable index should not be set");
2288       m->set_vtable_index(index);
2289     }
2290   }
2291   // Sort method array by ascending method name (for faster lookups & vtable construction)
2292   // Note that the ordering is not alphabetical, see Symbol::fast_compare
2293   methodOopDesc::sort_methods(methods(),
2294                               methods_annotations(),
2295                               methods_parameter_annotations(),
2296                               methods_default_annotations());
2297 
2298   // If JVMTI original method ordering or sharing is enabled construct int
2299   // array remembering the original ordering
2300   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2301     typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
2302     typeArrayHandle method_ordering(THREAD, new_ordering);
2303     for (int index = 0; index < length; index++) {
2304       methodOop m = methodOop(methods->obj_at(index));
2305       int old_index = m->vtable_index();
2306       assert(old_index >= 0 && old_index < length, "invalid method index");
2307       method_ordering->int_at_put(index, old_index);
2308       m->set_vtable_index(methodOopDesc::invalid_vtable_index);
2309     }
2310     return method_ordering;
2311   } else {
2312     return typeArrayHandle(THREAD, Universe::the_empty_int_array());
2313   }
2314 }
2315 
2316 
2317 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2318   ClassFileStream* cfs = stream();
2319   cfs->guarantee_more(2, CHECK);  // sourcefile_index
2320   u2 sourcefile_index = cfs->get_u2_fast();
2321   check_property(
2322     valid_cp_range(sourcefile_index, cp->length()) &&
2323       cp->tag_at(sourcefile_index).is_utf8(),
2324     "Invalid SourceFile attribute at constant pool index %u in class file %s",
2325     sourcefile_index, CHECK);
2326   k->set_source_file_name(cp->symbol_at(sourcefile_index));
2327 }
2328 
2329 
2330 
2331 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
2332                                                                        instanceKlassHandle k,
2333                                                                        int length, TRAPS) {
2334   ClassFileStream* cfs = stream();
2335   u1* sde_buffer = cfs->get_u1_buffer();
2336   assert(sde_buffer != NULL, "null sde buffer");
2337 
2338   // Don't bother storing it if there is no way to retrieve it
2339   if (JvmtiExport::can_get_source_debug_extension()) {
2340     k->set_source_debug_extension((char*)sde_buffer, length);
2341   }
2342   // Got utf8 string, set stream position forward
2343   cfs->skip_u1(length, CHECK);
2344 }
2345 
2346 
2347 // Inner classes can be static, private or protected (classic VM does this)
2348 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
2349 
2350 // Return number of classes in the inner classes attribute table
2351 u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start,
2352                                                             bool parsed_enclosingmethod_attribute,
2353                                                             u2 enclosing_method_class_index,
2354                                                             u2 enclosing_method_method_index,
2355                                                             constantPoolHandle cp,
2356                                                             instanceKlassHandle k, TRAPS) {
2357   ClassFileStream* cfs = stream();
2358   u1* current_mark = cfs->current();
2359   u2 length = 0;
2360   if (inner_classes_attribute_start != NULL) {
2361     cfs->set_current(inner_classes_attribute_start);
2362     cfs->guarantee_more(2, CHECK_0);  // length
2363     length = cfs->get_u2_fast();
2364   }
2365 
2366   // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
2367   // method data:
2368   //   [inner_class_info_index,
2369   //    outer_class_info_index,
2370   //    inner_name_index,
2371   //    inner_class_access_flags,
2372   //    ...
2373   //    enclosing_method_class_index,
2374   //    enclosing_method_method_index]
2375   int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
2376   typeArrayOop ic = oopFactory::new_permanent_shortArray(size, CHECK_0);
2377   typeArrayHandle inner_classes(THREAD, ic);
2378   int index = 0;
2379   int cp_size = cp->length();
2380   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
2381   for (int n = 0; n < length; n++) {
2382     // Inner class index
2383     u2 inner_class_info_index = cfs->get_u2_fast();
2384     check_property(
2385       inner_class_info_index == 0 ||
2386         (valid_cp_range(inner_class_info_index, cp_size) &&
2387         is_klass_reference(cp, inner_class_info_index)),
2388       "inner_class_info_index %u has bad constant type in class file %s",
2389       inner_class_info_index, CHECK_0);
2390     // Outer class index
2391     u2 outer_class_info_index = cfs->get_u2_fast();
2392     check_property(
2393       outer_class_info_index == 0 ||
2394         (valid_cp_range(outer_class_info_index, cp_size) &&
2395         is_klass_reference(cp, outer_class_info_index)),
2396       "outer_class_info_index %u has bad constant type in class file %s",
2397       outer_class_info_index, CHECK_0);
2398     // Inner class name
2399     u2 inner_name_index = cfs->get_u2_fast();
2400     check_property(
2401       inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
2402         cp->tag_at(inner_name_index).is_utf8()),
2403       "inner_name_index %u has bad constant type in class file %s",
2404       inner_name_index, CHECK_0);
2405     if (_need_verify) {
2406       guarantee_property(inner_class_info_index != outer_class_info_index,
2407                          "Class is both outer and inner class in class file %s", CHECK_0);
2408     }
2409     // Access flags
2410     AccessFlags inner_access_flags;
2411     jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
2412     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2413       // Set abstract bit for old class files for backward compatibility
2414       flags |= JVM_ACC_ABSTRACT;
2415     }
2416     verify_legal_class_modifiers(flags, CHECK_0);
2417     inner_access_flags.set_flags(flags);
2418 
2419     inner_classes->short_at_put(index++, inner_class_info_index);
2420     inner_classes->short_at_put(index++, outer_class_info_index);
2421     inner_classes->short_at_put(index++, inner_name_index);
2422     inner_classes->short_at_put(index++, inner_access_flags.as_short());
2423   }
2424 
2425   // 4347400: make sure there's no duplicate entry in the classes array
2426   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
2427     for(int i = 0; i < length * 4; i += 4) {
2428       for(int j = i + 4; j < length * 4; j += 4) {
2429         guarantee_property((inner_classes->ushort_at(i)   != inner_classes->ushort_at(j) ||
2430                             inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
2431                             inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
2432                             inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
2433                             "Duplicate entry in InnerClasses in class file %s",
2434                             CHECK_0);
2435       }
2436     }
2437   }
2438 
2439   // Set EnclosingMethod class and method indexes.
2440   if (parsed_enclosingmethod_attribute) {
2441     inner_classes->short_at_put(index++, enclosing_method_class_index);
2442     inner_classes->short_at_put(index++, enclosing_method_method_index);
2443   }
2444   assert(index == size, "wrong size");
2445 
2446   // Update instanceKlass with inner class info.
2447   k->set_inner_classes(inner_classes());
2448 
2449   // Restore buffer's current position.
2450   cfs->set_current(current_mark);
2451 
2452   return length;
2453 }
2454 
2455 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2456   k->set_is_synthetic();
2457 }
2458 
2459 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2460   ClassFileStream* cfs = stream();
2461   u2 signature_index = cfs->get_u2(CHECK);
2462   check_property(
2463     valid_cp_range(signature_index, cp->length()) &&
2464       cp->tag_at(signature_index).is_utf8(),
2465     "Invalid constant pool index %u in Signature attribute in class file %s",
2466     signature_index, CHECK);
2467   k->set_generic_signature(cp->symbol_at(signature_index));
2468 }
2469 
2470 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k,
2471                                                                   u4 attribute_byte_length, TRAPS) {
2472   ClassFileStream* cfs = stream();
2473   u1* current_start = cfs->current();
2474 
2475   cfs->guarantee_more(2, CHECK);  // length
2476   int attribute_array_length = cfs->get_u2_fast();
2477 
2478   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
2479                      "Short length on BootstrapMethods in class file %s",
2480                      CHECK);
2481 
2482   // The attribute contains a counted array of counted tuples of shorts,
2483   // represending bootstrap specifiers:
2484   //    length*{bootstrap_method_index, argument_count*{argument_index}}
2485   int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
2486   // operand_count = number of shorts in attr, except for leading length
2487 
2488   // The attribute is copied into a short[] array.
2489   // The array begins with a series of short[2] pairs, one for each tuple.
2490   int index_size = (attribute_array_length * 2);
2491 
2492   typeArrayOop operands_oop = oopFactory::new_permanent_intArray(index_size + operand_count, CHECK);
2493   typeArrayHandle operands(THREAD, operands_oop);
2494   operands_oop = NULL; // tidy
2495 
2496   int operand_fill_index = index_size;
2497   int cp_size = cp->length();
2498 
2499   for (int n = 0; n < attribute_array_length; n++) {
2500     // Store a 32-bit offset into the header of the operand array.
2501     assert(constantPoolOopDesc::operand_offset_at(operands(), n) == 0, "");
2502     constantPoolOopDesc::operand_offset_at_put(operands(), n, operand_fill_index);
2503 
2504     // Read a bootstrap specifier.
2505     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
2506     u2 bootstrap_method_index = cfs->get_u2_fast();
2507     u2 argument_count = cfs->get_u2_fast();
2508     check_property(
2509       valid_cp_range(bootstrap_method_index, cp_size) &&
2510       cp->tag_at(bootstrap_method_index).is_method_handle(),
2511       "bootstrap_method_index %u has bad constant type in class file %s",
2512       bootstrap_method_index,
2513       CHECK);
2514     operands->short_at_put(operand_fill_index++, bootstrap_method_index);
2515     operands->short_at_put(operand_fill_index++, argument_count);
2516 
2517     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
2518     for (int j = 0; j < argument_count; j++) {
2519       u2 argument_index = cfs->get_u2_fast();
2520       check_property(
2521         valid_cp_range(argument_index, cp_size) &&
2522         cp->tag_at(argument_index).is_loadable_constant(),
2523         "argument_index %u has bad constant type in class file %s",
2524         argument_index,
2525         CHECK);
2526       operands->short_at_put(operand_fill_index++, argument_index);
2527     }
2528   }
2529 
2530   assert(operand_fill_index == operands()->length(), "exact fill");
2531   assert(constantPoolOopDesc::operand_array_length(operands()) == attribute_array_length, "correct decode");
2532 
2533   u1* current_end = cfs->current();
2534   guarantee_property(current_end == current_start + attribute_byte_length,
2535                      "Bad length on BootstrapMethods in class file %s",
2536                      CHECK);
2537 
2538   cp->set_operands(operands());
2539 }
2540 
2541 
2542 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
2543   ClassFileStream* cfs = stream();
2544   // Set inner classes attribute to default sentinel
2545   k->set_inner_classes(Universe::the_empty_short_array());
2546   cfs->guarantee_more(2, CHECK);  // attributes_count
2547   u2 attributes_count = cfs->get_u2_fast();
2548   bool parsed_sourcefile_attribute = false;
2549   bool parsed_innerclasses_attribute = false;
2550   bool parsed_enclosingmethod_attribute = false;
2551   bool parsed_bootstrap_methods_attribute = false;
2552   u1* runtime_visible_annotations = NULL;
2553   int runtime_visible_annotations_length = 0;
2554   u1* runtime_invisible_annotations = NULL;
2555   int runtime_invisible_annotations_length = 0;
2556   u1* inner_classes_attribute_start = NULL;
2557   u4  inner_classes_attribute_length = 0;
2558   u2  enclosing_method_class_index = 0;
2559   u2  enclosing_method_method_index = 0;
2560   // Iterate over attributes
2561   while (attributes_count--) {
2562     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
2563     u2 attribute_name_index = cfs->get_u2_fast();
2564     u4 attribute_length = cfs->get_u4_fast();
2565     check_property(
2566       valid_cp_range(attribute_name_index, cp->length()) &&
2567         cp->tag_at(attribute_name_index).is_utf8(),
2568       "Attribute name has bad constant pool index %u in class file %s",
2569       attribute_name_index, CHECK);
2570     Symbol* tag = cp->symbol_at(attribute_name_index);
2571     if (tag == vmSymbols::tag_source_file()) {
2572       // Check for SourceFile tag
2573       if (_need_verify) {
2574         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
2575       }
2576       if (parsed_sourcefile_attribute) {
2577         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
2578       } else {
2579         parsed_sourcefile_attribute = true;
2580       }
2581       parse_classfile_sourcefile_attribute(cp, k, CHECK);
2582     } else if (tag == vmSymbols::tag_source_debug_extension()) {
2583       // Check for SourceDebugExtension tag
2584       parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK);
2585     } else if (tag == vmSymbols::tag_inner_classes()) {
2586       // Check for InnerClasses tag
2587       if (parsed_innerclasses_attribute) {
2588         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
2589       } else {
2590         parsed_innerclasses_attribute = true;
2591       }
2592       inner_classes_attribute_start = cfs->get_u1_buffer();
2593       inner_classes_attribute_length = attribute_length;
2594       cfs->skip_u1(inner_classes_attribute_length, CHECK);
2595     } else if (tag == vmSymbols::tag_synthetic()) {
2596       // Check for Synthetic tag
2597       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
2598       if (attribute_length != 0) {
2599         classfile_parse_error(
2600           "Invalid Synthetic classfile attribute length %u in class file %s",
2601           attribute_length, CHECK);
2602       }
2603       parse_classfile_synthetic_attribute(cp, k, CHECK);
2604     } else if (tag == vmSymbols::tag_deprecated()) {
2605       // Check for Deprecatd tag - 4276120
2606       if (attribute_length != 0) {
2607         classfile_parse_error(
2608           "Invalid Deprecated classfile attribute length %u in class file %s",
2609           attribute_length, CHECK);
2610       }
2611     } else if (_major_version >= JAVA_1_5_VERSION) {
2612       if (tag == vmSymbols::tag_signature()) {
2613         if (attribute_length != 2) {
2614           classfile_parse_error(
2615             "Wrong Signature attribute length %u in class file %s",
2616             attribute_length, CHECK);
2617         }
2618         parse_classfile_signature_attribute(cp, k, CHECK);
2619       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
2620         runtime_visible_annotations_length = attribute_length;
2621         runtime_visible_annotations = cfs->get_u1_buffer();
2622         assert(runtime_visible_annotations != NULL, "null visible annotations");
2623         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
2624       } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
2625         runtime_invisible_annotations_length = attribute_length;
2626         runtime_invisible_annotations = cfs->get_u1_buffer();
2627         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2628         cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
2629       } else if (tag == vmSymbols::tag_enclosing_method()) {
2630         if (parsed_enclosingmethod_attribute) {
2631           classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
2632         }   else {
2633           parsed_enclosingmethod_attribute = true;
2634         }
2635         cfs->guarantee_more(4, CHECK);  // class_index, method_index
2636         enclosing_method_class_index  = cfs->get_u2_fast();
2637         enclosing_method_method_index = cfs->get_u2_fast();
2638         if (enclosing_method_class_index == 0) {
2639           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
2640         }
2641         // Validate the constant pool indices and types
2642         if (!cp->is_within_bounds(enclosing_method_class_index) ||
2643             !is_klass_reference(cp, enclosing_method_class_index)) {
2644           classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
2645         }
2646         if (enclosing_method_method_index != 0 &&
2647             (!cp->is_within_bounds(enclosing_method_method_index) ||
2648              !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
2649           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
2650         }
2651       } else if (tag == vmSymbols::tag_bootstrap_methods() &&
2652                  _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
2653         if (parsed_bootstrap_methods_attribute)
2654           classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
2655         parsed_bootstrap_methods_attribute = true;
2656         parse_classfile_bootstrap_methods_attribute(cp, k, attribute_length, CHECK);
2657       } else {
2658         // Unknown attribute
2659         cfs->skip_u1(attribute_length, CHECK);
2660       }
2661     } else {
2662       // Unknown attribute
2663       cfs->skip_u1(attribute_length, CHECK);
2664     }
2665   }
2666   typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
2667                                                      runtime_visible_annotations_length,
2668                                                      runtime_invisible_annotations,
2669                                                      runtime_invisible_annotations_length,
2670                                                      CHECK);
2671   k->set_class_annotations(annotations());
2672 
2673   if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
2674     u2 num_of_classes = parse_classfile_inner_classes_attribute(
2675                             inner_classes_attribute_start,
2676                             parsed_innerclasses_attribute,
2677                             enclosing_method_class_index,
2678                             enclosing_method_method_index,
2679                             cp, k, CHECK);
2680     if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
2681       guarantee_property(
2682         inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
2683         "Wrong InnerClasses attribute length in class file %s", CHECK);
2684     }
2685   }
2686 
2687   if (_max_bootstrap_specifier_index >= 0) {
2688     guarantee_property(parsed_bootstrap_methods_attribute,
2689                        "Missing BootstrapMethods attribute in class file %s", CHECK);
2690   }
2691 }
2692 
2693 
2694 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
2695                                                       int runtime_visible_annotations_length,
2696                                                       u1* runtime_invisible_annotations,
2697                                                       int runtime_invisible_annotations_length, TRAPS) {
2698   typeArrayHandle annotations;
2699   if (runtime_visible_annotations != NULL ||
2700       runtime_invisible_annotations != NULL) {
2701     typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
2702                                                             runtime_invisible_annotations_length, CHECK_(annotations));
2703     annotations = typeArrayHandle(THREAD, anno);
2704     if (runtime_visible_annotations != NULL) {
2705       memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
2706     }
2707     if (runtime_invisible_annotations != NULL) {
2708       memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
2709     }
2710   }
2711   return annotations;
2712 }
2713 
2714 
2715 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
2716                                                     Handle class_loader,
2717                                                     Handle protection_domain,
2718                                                     KlassHandle host_klass,
2719                                                     GrowableArray<Handle>* cp_patches,
2720                                                     TempNewSymbol& parsed_name,
2721                                                     bool verify,
2722                                                     TRAPS) {
2723   // When a retransformable agent is attached, JVMTI caches the
2724   // class bytes that existed before the first retransformation.
2725   // If RedefineClasses() was used before the retransformable
2726   // agent attached, then the cached class bytes may not be the
2727   // original class bytes.
2728   unsigned char *cached_class_file_bytes = NULL;
2729   jint cached_class_file_length;
2730 
2731   ClassFileStream* cfs = stream();
2732   // Timing
2733   assert(THREAD->is_Java_thread(), "must be a JavaThread");
2734   JavaThread* jt = (JavaThread*) THREAD;
2735 
2736   PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
2737                             ClassLoader::perf_class_parse_selftime(),
2738                             NULL,
2739                             jt->get_thread_stat()->perf_recursion_counts_addr(),
2740                             jt->get_thread_stat()->perf_timers_addr(),
2741                             PerfClassTraceTime::PARSE_CLASS);
2742 
2743   _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
2744   _max_bootstrap_specifier_index = -1;
2745 
2746   if (JvmtiExport::should_post_class_file_load_hook()) {
2747     // Get the cached class file bytes (if any) from the class that
2748     // is being redefined or retransformed. We use jvmti_thread_state()
2749     // instead of JvmtiThreadState::state_for(jt) so we don't allocate
2750     // a JvmtiThreadState any earlier than necessary. This will help
2751     // avoid the bug described by 7126851.
2752     JvmtiThreadState *state = jt->jvmti_thread_state();
2753     if (state != NULL) {
2754       KlassHandle *h_class_being_redefined =
2755                      state->get_class_being_redefined();
2756       if (h_class_being_redefined != NULL) {
2757         instanceKlassHandle ikh_class_being_redefined =
2758           instanceKlassHandle(THREAD, (*h_class_being_redefined)());
2759         cached_class_file_bytes =
2760           ikh_class_being_redefined->get_cached_class_file_bytes();
2761         cached_class_file_length =
2762           ikh_class_being_redefined->get_cached_class_file_len();
2763       }
2764     }
2765 
2766     unsigned char* ptr = cfs->buffer();
2767     unsigned char* end_ptr = cfs->buffer() + cfs->length();
2768 
2769     JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
2770                                            &ptr, &end_ptr,
2771                                            &cached_class_file_bytes,
2772                                            &cached_class_file_length);
2773 
2774     if (ptr != cfs->buffer()) {
2775       // JVMTI agent has modified class file data.
2776       // Set new class file stream using JVMTI agent modified
2777       // class file data.
2778       cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
2779       set_stream(cfs);
2780     }
2781   }
2782 
2783   _host_klass = host_klass;
2784   _cp_patches = cp_patches;
2785 
2786   instanceKlassHandle nullHandle;
2787 
2788   // Figure out whether we can skip format checking (matching classic VM behavior)
2789   _need_verify = Verifier::should_verify_for(class_loader(), verify);
2790 
2791   // Set the verify flag in stream
2792   cfs->set_verify(_need_verify);
2793 
2794   // Save the class file name for easier error message printing.
2795   _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
2796 
2797   cfs->guarantee_more(8, CHECK_(nullHandle));  // magic, major, minor
2798   // Magic value
2799   u4 magic = cfs->get_u4_fast();
2800   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
2801                      "Incompatible magic value %u in class file %s",
2802                      magic, CHECK_(nullHandle));
2803 
2804   // Version numbers
2805   u2 minor_version = cfs->get_u2_fast();
2806   u2 major_version = cfs->get_u2_fast();
2807 
2808   // Check version numbers - we check this even with verifier off
2809   if (!is_supported_version(major_version, minor_version)) {
2810     if (name == NULL) {
2811       Exceptions::fthrow(
2812         THREAD_AND_LOCATION,
2813         vmSymbols::java_lang_UnsupportedClassVersionError(),
2814         "Unsupported major.minor version %u.%u",
2815         major_version,
2816         minor_version);
2817     } else {
2818       ResourceMark rm(THREAD);
2819       Exceptions::fthrow(
2820         THREAD_AND_LOCATION,
2821         vmSymbols::java_lang_UnsupportedClassVersionError(),
2822         "%s : Unsupported major.minor version %u.%u",
2823         name->as_C_string(),
2824         major_version,
2825         minor_version);
2826     }
2827     return nullHandle;
2828   }
2829 
2830   _major_version = major_version;
2831   _minor_version = minor_version;
2832 
2833 
2834   // Check if verification needs to be relaxed for this class file
2835   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
2836   _relax_verify = Verifier::relax_verify_for(class_loader());
2837 
2838   // Constant pool
2839   constantPoolHandle cp = parse_constant_pool(class_loader, CHECK_(nullHandle));
2840   ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
2841 
2842   int cp_size = cp->length();
2843 
2844   cfs->guarantee_more(8, CHECK_(nullHandle));  // flags, this_class, super_class, infs_len
2845 
2846   // Access flags
2847   AccessFlags access_flags;
2848   jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
2849 
2850   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
2851     // Set abstract bit for old class files for backward compatibility
2852     flags |= JVM_ACC_ABSTRACT;
2853   }
2854   verify_legal_class_modifiers(flags, CHECK_(nullHandle));
2855   access_flags.set_flags(flags);
2856 
2857   // This class and superclass
2858   instanceKlassHandle super_klass;
2859   u2 this_class_index = cfs->get_u2_fast();
2860   check_property(
2861     valid_cp_range(this_class_index, cp_size) &&
2862       cp->tag_at(this_class_index).is_unresolved_klass(),
2863     "Invalid this class index %u in constant pool in class file %s",
2864     this_class_index, CHECK_(nullHandle));
2865 
2866   Symbol*  class_name  = cp->unresolved_klass_at(this_class_index);
2867   assert(class_name != NULL, "class_name can't be null");
2868 
2869   // It's important to set parsed_name *before* resolving the super class.
2870   // (it's used for cleanup by the caller if parsing fails)
2871   parsed_name = class_name;
2872   // parsed_name is returned and can be used if there's an error, so add to
2873   // its reference count.  Caller will decrement the refcount.
2874   parsed_name->increment_refcount();
2875 
2876   // Update _class_name which could be null previously to be class_name
2877   _class_name = class_name;
2878 
2879   // Don't need to check whether this class name is legal or not.
2880   // It has been checked when constant pool is parsed.
2881   // However, make sure it is not an array type.
2882   if (_need_verify) {
2883     guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
2884                        "Bad class name in class file %s",
2885                        CHECK_(nullHandle));
2886   }
2887 
2888   klassOop preserve_this_klass;   // for storing result across HandleMark
2889 
2890   // release all handles when parsing is done
2891   { HandleMark hm(THREAD);
2892 
2893     // Checks if name in class file matches requested name
2894     if (name != NULL && class_name != name) {
2895       ResourceMark rm(THREAD);
2896       Exceptions::fthrow(
2897         THREAD_AND_LOCATION,
2898         vmSymbols::java_lang_NoClassDefFoundError(),
2899         "%s (wrong name: %s)",
2900         name->as_C_string(),
2901         class_name->as_C_string()
2902       );
2903       return nullHandle;
2904     }
2905 
2906     if (TraceClassLoadingPreorder) {
2907       tty->print("[Loading %s", name->as_klass_external_name());
2908       if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
2909       tty->print_cr("]");
2910     }
2911 
2912     u2 super_class_index = cfs->get_u2_fast();
2913     if (super_class_index == 0) {
2914       check_property(class_name == vmSymbols::java_lang_Object(),
2915                      "Invalid superclass index %u in class file %s",
2916                      super_class_index,
2917                      CHECK_(nullHandle));
2918     } else {
2919       check_property(valid_cp_range(super_class_index, cp_size) &&
2920                      is_klass_reference(cp, super_class_index),
2921                      "Invalid superclass index %u in class file %s",
2922                      super_class_index,
2923                      CHECK_(nullHandle));
2924       // The class name should be legal because it is checked when parsing constant pool.
2925       // However, make sure it is not an array type.
2926       bool is_array = false;
2927       if (cp->tag_at(super_class_index).is_klass()) {
2928         super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index));
2929         if (_need_verify)
2930           is_array = super_klass->oop_is_array();
2931       } else if (_need_verify) {
2932         is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
2933       }
2934       if (_need_verify) {
2935         guarantee_property(!is_array,
2936                           "Bad superclass name in class file %s", CHECK_(nullHandle));
2937       }
2938     }
2939 
2940     // Interfaces
2941     u2 itfs_len = cfs->get_u2_fast();
2942     objArrayHandle local_interfaces;
2943     if (itfs_len == 0) {
2944       local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
2945     } else {
2946       local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle));
2947     }
2948 
2949     u2 java_fields_count = 0;
2950     // Fields (offsets are filled in later)
2951     FieldAllocationCount fac;
2952     objArrayHandle fields_annotations;
2953     typeArrayHandle fields = parse_fields(class_name, cp, access_flags.is_interface(), &fac, &fields_annotations,
2954                                           &java_fields_count,
2955                                           CHECK_(nullHandle));
2956     // Methods
2957     bool has_final_method = false;
2958     AccessFlags promoted_flags;
2959     promoted_flags.set_flags(0);
2960     // These need to be oop pointers because they are allocated lazily
2961     // inside parse_methods inside a nested HandleMark
2962     objArrayOop methods_annotations_oop = NULL;
2963     objArrayOop methods_parameter_annotations_oop = NULL;
2964     objArrayOop methods_default_annotations_oop = NULL;
2965     objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
2966                                            &promoted_flags,
2967                                            &has_final_method,
2968                                            &methods_annotations_oop,
2969                                            &methods_parameter_annotations_oop,
2970                                            &methods_default_annotations_oop,
2971                                            CHECK_(nullHandle));
2972 
2973     objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
2974     objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
2975     objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
2976 
2977     // We check super class after class file is parsed and format is checked
2978     if (super_class_index > 0 && super_klass.is_null()) {
2979       Symbol*  sk  = cp->klass_name_at(super_class_index);
2980       if (access_flags.is_interface()) {
2981         // Before attempting to resolve the superclass, check for class format
2982         // errors not checked yet.
2983         guarantee_property(sk == vmSymbols::java_lang_Object(),
2984                            "Interfaces must have java.lang.Object as superclass in class file %s",
2985                            CHECK_(nullHandle));
2986       }
2987       klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
2988                                                            sk,
2989                                                            class_loader,
2990                                                            protection_domain,
2991                                                            true,
2992                                                            CHECK_(nullHandle));
2993 
2994       KlassHandle kh (THREAD, k);
2995       super_klass = instanceKlassHandle(THREAD, kh());
2996       if (LinkWellKnownClasses)  // my super class is well known to me
2997         cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve
2998     }
2999     if (super_klass.not_null()) {
3000       if (super_klass->is_interface()) {
3001         ResourceMark rm(THREAD);
3002         Exceptions::fthrow(
3003           THREAD_AND_LOCATION,
3004           vmSymbols::java_lang_IncompatibleClassChangeError(),
3005           "class %s has interface %s as super class",
3006           class_name->as_klass_external_name(),
3007           super_klass->external_name()
3008         );
3009         return nullHandle;
3010       }
3011       // Make sure super class is not final
3012       if (super_klass->is_final()) {
3013         THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
3014       }
3015     }
3016 
3017     // Compute the transitive list of all unique interfaces implemented by this class
3018     objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
3019 
3020     // sort methods
3021     typeArrayHandle method_ordering = sort_methods(methods,
3022                                                    methods_annotations,
3023                                                    methods_parameter_annotations,
3024                                                    methods_default_annotations,
3025                                                    CHECK_(nullHandle));
3026 
3027     // promote flags from parse_methods() to the klass' flags
3028     access_flags.add_promoted_flags(promoted_flags.as_int());
3029 
3030     // Size of Java vtable (in words)
3031     int vtable_size = 0;
3032     int itable_size = 0;
3033     int num_miranda_methods = 0;
3034 
3035     klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
3036                                                       num_miranda_methods,
3037                                                       super_klass(),
3038                                                       methods(),
3039                                                       access_flags,
3040                                                       class_loader,
3041                                                       class_name,
3042                                                       local_interfaces(),
3043                                                       CHECK_(nullHandle));
3044 
3045     // Size of Java itable (in words)
3046     itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
3047 
3048     // Field size and offset computation
3049     int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
3050 #ifndef PRODUCT
3051     int orig_nonstatic_field_size = 0;
3052 #endif
3053     int static_field_size = 0;
3054     int next_static_oop_offset;
3055     int next_static_double_offset;
3056     int next_static_word_offset;
3057     int next_static_short_offset;
3058     int next_static_byte_offset;
3059     int next_static_type_offset;
3060     int next_nonstatic_oop_offset;
3061     int next_nonstatic_double_offset;
3062     int next_nonstatic_word_offset;
3063     int next_nonstatic_short_offset;
3064     int next_nonstatic_byte_offset;
3065     int next_nonstatic_type_offset;
3066     int first_nonstatic_oop_offset;
3067     int first_nonstatic_field_offset;
3068     int next_nonstatic_field_offset;
3069 
3070     // Calculate the starting byte offsets
3071     next_static_oop_offset      = instanceMirrorKlass::offset_of_static_fields();
3072     next_static_double_offset   = next_static_oop_offset +
3073                                   (fac.count[STATIC_OOP] * heapOopSize);
3074     if ( fac.count[STATIC_DOUBLE] &&
3075          (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3076           Universe::field_type_should_be_aligned(T_LONG)) ) {
3077       next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3078     }
3079 
3080     next_static_word_offset     = next_static_double_offset +
3081                                   (fac.count[STATIC_DOUBLE] * BytesPerLong);
3082     next_static_short_offset    = next_static_word_offset +
3083                                   (fac.count[STATIC_WORD] * BytesPerInt);
3084     next_static_byte_offset     = next_static_short_offset +
3085                                   (fac.count[STATIC_SHORT] * BytesPerShort);
3086     next_static_type_offset     = align_size_up((next_static_byte_offset +
3087                                   fac.count[STATIC_BYTE] ), wordSize );
3088     static_field_size           = (next_static_type_offset -
3089                                   next_static_oop_offset) / wordSize;
3090 
3091     first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
3092                                    nonstatic_field_size * heapOopSize;
3093     next_nonstatic_field_offset = first_nonstatic_field_offset;
3094 
3095     unsigned int nonstatic_double_count = fac.count[NONSTATIC_DOUBLE];
3096     unsigned int nonstatic_word_count   = fac.count[NONSTATIC_WORD];
3097     unsigned int nonstatic_short_count  = fac.count[NONSTATIC_SHORT];
3098     unsigned int nonstatic_byte_count   = fac.count[NONSTATIC_BYTE];
3099     unsigned int nonstatic_oop_count    = fac.count[NONSTATIC_OOP];
3100 
3101     bool super_has_nonstatic_fields =
3102             (super_klass() != NULL && super_klass->has_nonstatic_fields());
3103     bool has_nonstatic_fields  =  super_has_nonstatic_fields ||
3104             ((nonstatic_double_count + nonstatic_word_count +
3105               nonstatic_short_count + nonstatic_byte_count +
3106               nonstatic_oop_count) != 0);
3107 
3108 
3109     // Prepare list of oops for oop map generation.
3110     int* nonstatic_oop_offsets;
3111     unsigned int* nonstatic_oop_counts;
3112     unsigned int nonstatic_oop_map_count = 0;
3113 
3114     nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3115               THREAD, int, nonstatic_oop_count + 1);
3116     nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
3117               THREAD, unsigned int, nonstatic_oop_count + 1);
3118 
3119     first_nonstatic_oop_offset = 0; // will be set for first oop field
3120 
3121 #ifndef PRODUCT
3122     if( PrintCompactFieldsSavings ) {
3123       next_nonstatic_double_offset = next_nonstatic_field_offset +
3124                                      (nonstatic_oop_count * heapOopSize);
3125       if ( nonstatic_double_count > 0 ) {
3126         next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
3127       }
3128       next_nonstatic_word_offset  = next_nonstatic_double_offset +
3129                                     (nonstatic_double_count * BytesPerLong);
3130       next_nonstatic_short_offset = next_nonstatic_word_offset +
3131                                     (nonstatic_word_count * BytesPerInt);
3132       next_nonstatic_byte_offset  = next_nonstatic_short_offset +
3133                                     (nonstatic_short_count * BytesPerShort);
3134       next_nonstatic_type_offset  = align_size_up((next_nonstatic_byte_offset +
3135                                     nonstatic_byte_count ), heapOopSize );
3136       orig_nonstatic_field_size   = nonstatic_field_size +
3137       ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
3138     }
3139 #endif
3140     bool compact_fields   = CompactFields;
3141     int  allocation_style = FieldsAllocationStyle;
3142     if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3143       assert(false, "0 <= FieldsAllocationStyle <= 2");
3144       allocation_style = 1; // Optimistic
3145     }
3146 
3147     // The next classes have predefined hard-coded fields offsets
3148     // (see in JavaClasses::compute_hard_coded_offsets()).
3149     // Use default fields allocation order for them.
3150     if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
3151         (class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3152          class_name == vmSymbols::java_lang_Class() ||
3153          class_name == vmSymbols::java_lang_ClassLoader() ||
3154          class_name == vmSymbols::java_lang_ref_Reference() ||
3155          class_name == vmSymbols::java_lang_ref_SoftReference() ||
3156          class_name == vmSymbols::java_lang_StackTraceElement() ||
3157          class_name == vmSymbols::java_lang_String() ||
3158          class_name == vmSymbols::java_lang_Throwable() ||
3159          class_name == vmSymbols::java_lang_Boolean() ||
3160          class_name == vmSymbols::java_lang_Character() ||
3161          class_name == vmSymbols::java_lang_Float() ||
3162          class_name == vmSymbols::java_lang_Double() ||
3163          class_name == vmSymbols::java_lang_Byte() ||
3164          class_name == vmSymbols::java_lang_Short() ||
3165          class_name == vmSymbols::java_lang_Integer() ||
3166          class_name == vmSymbols::java_lang_Long())) {
3167       allocation_style = 0;     // Allocate oops first
3168       compact_fields   = false; // Don't compact fields
3169     }
3170 
3171     if( allocation_style == 0 ) {
3172       // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
3173       next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3174       next_nonstatic_double_offset = next_nonstatic_oop_offset +
3175                                       (nonstatic_oop_count * heapOopSize);
3176     } else if( allocation_style == 1 ) {
3177       // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
3178       next_nonstatic_double_offset = next_nonstatic_field_offset;
3179     } else if( allocation_style == 2 ) {
3180       // Fields allocation: oops fields in super and sub classes are together.
3181       if( nonstatic_field_size > 0 && super_klass() != NULL &&
3182           super_klass->nonstatic_oop_map_size() > 0 ) {
3183         int map_count = super_klass->nonstatic_oop_map_count();
3184         OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
3185         OopMapBlock* last_map = first_map + map_count - 1;
3186         int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3187         if (next_offset == next_nonstatic_field_offset) {
3188           allocation_style = 0;   // allocate oops first
3189           next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3190           next_nonstatic_double_offset = next_nonstatic_oop_offset +
3191                                          (nonstatic_oop_count * heapOopSize);
3192         }
3193       }
3194       if( allocation_style == 2 ) {
3195         allocation_style = 1;     // allocate oops last
3196         next_nonstatic_double_offset = next_nonstatic_field_offset;
3197       }
3198     } else {
3199       ShouldNotReachHere();
3200     }
3201 
3202     int nonstatic_oop_space_count   = 0;
3203     int nonstatic_word_space_count  = 0;
3204     int nonstatic_short_space_count = 0;
3205     int nonstatic_byte_space_count  = 0;
3206     int nonstatic_oop_space_offset;
3207     int nonstatic_word_space_offset;
3208     int nonstatic_short_space_offset;
3209     int nonstatic_byte_space_offset;
3210 
3211     if( nonstatic_double_count > 0 ) {
3212       int offset = next_nonstatic_double_offset;
3213       next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3214       if( compact_fields && offset != next_nonstatic_double_offset ) {
3215         // Allocate available fields into the gap before double field.
3216         int length = next_nonstatic_double_offset - offset;
3217         assert(length == BytesPerInt, "");
3218         nonstatic_word_space_offset = offset;
3219         if( nonstatic_word_count > 0 ) {
3220           nonstatic_word_count      -= 1;
3221           nonstatic_word_space_count = 1; // Only one will fit
3222           length -= BytesPerInt;
3223           offset += BytesPerInt;
3224         }
3225         nonstatic_short_space_offset = offset;
3226         while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
3227           nonstatic_short_count       -= 1;
3228           nonstatic_short_space_count += 1;
3229           length -= BytesPerShort;
3230           offset += BytesPerShort;
3231         }
3232         nonstatic_byte_space_offset = offset;
3233         while( length > 0 && nonstatic_byte_count > 0 ) {
3234           nonstatic_byte_count       -= 1;
3235           nonstatic_byte_space_count += 1;
3236           length -= 1;
3237         }
3238         // Allocate oop field in the gap if there are no other fields for that.
3239         nonstatic_oop_space_offset = offset;
3240         if( length >= heapOopSize && nonstatic_oop_count > 0 &&
3241             allocation_style != 0 ) { // when oop fields not first
3242           nonstatic_oop_count      -= 1;
3243           nonstatic_oop_space_count = 1; // Only one will fit
3244           length -= heapOopSize;
3245           offset += heapOopSize;
3246         }
3247       }
3248     }
3249 
3250     next_nonstatic_word_offset  = next_nonstatic_double_offset +
3251                                   (nonstatic_double_count * BytesPerLong);
3252     next_nonstatic_short_offset = next_nonstatic_word_offset +
3253                                   (nonstatic_word_count * BytesPerInt);
3254     next_nonstatic_byte_offset  = next_nonstatic_short_offset +
3255                                   (nonstatic_short_count * BytesPerShort);
3256 
3257     int notaligned_offset;
3258     if( allocation_style == 0 ) {
3259       notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3260     } else { // allocation_style == 1
3261       next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
3262       if( nonstatic_oop_count > 0 ) {
3263         next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3264       }
3265       notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3266     }
3267     next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
3268     nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
3269                                    - first_nonstatic_field_offset)/heapOopSize);
3270 
3271     // Iterate over fields again and compute correct offsets.
3272     // The field allocation type was temporarily stored in the offset slot.
3273     // oop fields are located before non-oop fields (static and non-static).
3274     for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3275       int real_offset;
3276       FieldAllocationType atype = (FieldAllocationType) fs.offset();
3277       switch (atype) {
3278         case STATIC_OOP:
3279           real_offset = next_static_oop_offset;
3280           next_static_oop_offset += heapOopSize;
3281           break;
3282         case STATIC_BYTE:
3283           real_offset = next_static_byte_offset;
3284           next_static_byte_offset += 1;
3285           break;
3286         case STATIC_SHORT:
3287           real_offset = next_static_short_offset;
3288           next_static_short_offset += BytesPerShort;
3289           break;
3290         case STATIC_WORD:
3291           real_offset = next_static_word_offset;
3292           next_static_word_offset += BytesPerInt;
3293           break;
3294         case STATIC_DOUBLE:
3295           real_offset = next_static_double_offset;
3296           next_static_double_offset += BytesPerLong;
3297           break;
3298         case NONSTATIC_OOP:
3299           if( nonstatic_oop_space_count > 0 ) {
3300             real_offset = nonstatic_oop_space_offset;
3301             nonstatic_oop_space_offset += heapOopSize;
3302             nonstatic_oop_space_count  -= 1;
3303           } else {
3304             real_offset = next_nonstatic_oop_offset;
3305             next_nonstatic_oop_offset += heapOopSize;
3306           }
3307           // Update oop maps
3308           if( nonstatic_oop_map_count > 0 &&
3309               nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3310               real_offset -
3311               int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3312               heapOopSize ) {
3313             // Extend current oop map
3314             nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3315           } else {
3316             // Create new oop map
3317             nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3318             nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3319             nonstatic_oop_map_count += 1;
3320             if( first_nonstatic_oop_offset == 0 ) { // Undefined
3321               first_nonstatic_oop_offset = real_offset;
3322             }
3323           }
3324           break;
3325         case NONSTATIC_BYTE:
3326           if( nonstatic_byte_space_count > 0 ) {
3327             real_offset = nonstatic_byte_space_offset;
3328             nonstatic_byte_space_offset += 1;
3329             nonstatic_byte_space_count  -= 1;
3330           } else {
3331             real_offset = next_nonstatic_byte_offset;
3332             next_nonstatic_byte_offset += 1;
3333           }
3334           break;
3335         case NONSTATIC_SHORT:
3336           if( nonstatic_short_space_count > 0 ) {
3337             real_offset = nonstatic_short_space_offset;
3338             nonstatic_short_space_offset += BytesPerShort;
3339             nonstatic_short_space_count  -= 1;
3340           } else {
3341             real_offset = next_nonstatic_short_offset;
3342             next_nonstatic_short_offset += BytesPerShort;
3343           }
3344           break;
3345         case NONSTATIC_WORD:
3346           if( nonstatic_word_space_count > 0 ) {
3347             real_offset = nonstatic_word_space_offset;
3348             nonstatic_word_space_offset += BytesPerInt;
3349             nonstatic_word_space_count  -= 1;
3350           } else {
3351             real_offset = next_nonstatic_word_offset;
3352             next_nonstatic_word_offset += BytesPerInt;
3353           }
3354           break;
3355         case NONSTATIC_DOUBLE:
3356           real_offset = next_nonstatic_double_offset;
3357           next_nonstatic_double_offset += BytesPerLong;
3358           break;
3359         default:
3360           ShouldNotReachHere();
3361       }
3362       fs.set_offset(real_offset);
3363     }
3364 
3365     // Size of instances
3366     int instance_size;
3367 
3368     next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
3369     instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
3370 
3371     assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
3372 
3373     // Number of non-static oop map blocks allocated at end of klass.
3374     const unsigned int total_oop_map_count =
3375       compute_oop_map_count(super_klass, nonstatic_oop_map_count,
3376                             first_nonstatic_oop_offset);
3377 
3378     // Compute reference type
3379     ReferenceType rt;
3380     if (super_klass() == NULL) {
3381       rt = REF_NONE;
3382     } else {
3383       rt = super_klass->reference_type();
3384     }
3385 
3386     // We can now create the basic klassOop for this klass
3387     klassOop ik = oopFactory::new_instanceKlass(name, vtable_size, itable_size,
3388                                                 static_field_size,
3389                                                 total_oop_map_count,
3390                                                 access_flags,
3391                                                 rt, host_klass,
3392                                                 CHECK_(nullHandle));
3393     instanceKlassHandle this_klass (THREAD, ik);
3394 
3395     assert(this_klass->static_field_size() == static_field_size, "sanity");
3396     assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
3397            "sanity");
3398 
3399     // Fill in information already parsed
3400     this_klass->set_should_verify_class(verify);
3401     jint lh = Klass::instance_layout_helper(instance_size, false);
3402     this_klass->set_layout_helper(lh);
3403     assert(this_klass->oop_is_instance(), "layout is correct");
3404     assert(this_klass->size_helper() == instance_size, "correct size_helper");
3405     // Not yet: supers are done below to support the new subtype-checking fields
3406     //this_klass->set_super(super_klass());
3407     this_klass->set_class_loader(class_loader());
3408     this_klass->set_nonstatic_field_size(nonstatic_field_size);
3409     this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
3410     this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
3411     cp->set_pool_holder(this_klass());
3412     error_handler.set_in_error(false);   // turn off error handler for cp
3413     this_klass->set_constants(cp());
3414     this_klass->set_local_interfaces(local_interfaces());
3415     this_klass->set_fields(fields(), java_fields_count);
3416     this_klass->set_methods(methods());
3417     if (has_final_method) {
3418       this_klass->set_has_final_method();
3419     }
3420     this_klass->set_method_ordering(method_ordering());
3421     // The instanceKlass::_methods_jmethod_ids cache and the
3422     // instanceKlass::_methods_cached_itable_indices cache are
3423     // both managed on the assumption that the initial cache
3424     // size is equal to the number of methods in the class. If
3425     // that changes, then instanceKlass::idnum_can_increment()
3426     // has to be changed accordingly.
3427     this_klass->set_initial_method_idnum(methods->length());
3428     this_klass->set_name(cp->klass_name_at(this_class_index));
3429     if (LinkWellKnownClasses || is_anonymous())  // I am well known to myself
3430       cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
3431     this_klass->set_protection_domain(protection_domain());
3432     this_klass->set_fields_annotations(fields_annotations());
3433     this_klass->set_methods_annotations(methods_annotations());
3434     this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
3435     this_klass->set_methods_default_annotations(methods_default_annotations());
3436 
3437     this_klass->set_minor_version(minor_version);
3438     this_klass->set_major_version(major_version);
3439 
3440     // Set up methodOop::intrinsic_id as soon as we know the names of methods.
3441     // (We used to do this lazily, but now we query it in Rewriter,
3442     // which is eagerly done for every method, so we might as well do it now,
3443     // when everything is fresh in memory.)
3444     if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) {
3445       for (int j = 0; j < methods->length(); j++) {
3446         ((methodOop)methods->obj_at(j))->init_intrinsic_id();
3447       }
3448     }
3449 
3450     if (cached_class_file_bytes != NULL) {
3451       // JVMTI: we have an instanceKlass now, tell it about the cached bytes
3452       this_klass->set_cached_class_file(cached_class_file_bytes,
3453                                         cached_class_file_length);
3454     }
3455 
3456     // Miranda methods
3457     if ((num_miranda_methods > 0) ||
3458         // if this class introduced new miranda methods or
3459         (super_klass.not_null() && (super_klass->has_miranda_methods()))
3460         // super class exists and this class inherited miranda methods
3461         ) {
3462       this_klass->set_has_miranda_methods(); // then set a flag
3463     }
3464 
3465     // Additional attributes
3466     parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle));
3467 
3468     // Make sure this is the end of class file stream
3469     guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
3470 
3471     // VerifyOops believes that once this has been set, the object is completely loaded.
3472     // Compute transitive closure of interfaces this class implements
3473     this_klass->set_transitive_interfaces(transitive_interfaces());
3474 
3475     // Fill in information needed to compute superclasses.
3476     this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
3477 
3478     // Initialize itable offset tables
3479     klassItable::setup_itable_offset_table(this_klass);
3480 
3481     // Do final class setup
3482     fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
3483 
3484     set_precomputed_flags(this_klass);
3485 
3486     // reinitialize modifiers, using the InnerClasses attribute
3487     int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
3488     this_klass->set_modifier_flags(computed_modifiers);
3489 
3490     // check if this class can access its super class
3491     check_super_class_access(this_klass, CHECK_(nullHandle));
3492 
3493     // check if this class can access its superinterfaces
3494     check_super_interface_access(this_klass, CHECK_(nullHandle));
3495 
3496     // check if this class overrides any final method
3497     check_final_method_override(this_klass, CHECK_(nullHandle));
3498 
3499     // check that if this class is an interface then it doesn't have static methods
3500     if (this_klass->is_interface()) {
3501       check_illegal_static_method(this_klass, CHECK_(nullHandle));
3502     }
3503 
3504     // Allocate mirror and initialize static fields
3505     java_lang_Class::create_mirror(this_klass, CHECK_(nullHandle));
3506 
3507     ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
3508                                              false /* not shared class */);
3509 
3510     if (TraceClassLoading) {
3511       // print in a single call to reduce interleaving of output
3512       if (cfs->source() != NULL) {
3513         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3514                    cfs->source());
3515       } else if (class_loader.is_null()) {
3516         if (THREAD->is_Java_thread()) {
3517           klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
3518           tty->print("[Loaded %s by instance of %s]\n",
3519                      this_klass->external_name(),
3520                      instanceKlass::cast(caller)->external_name());
3521         } else {
3522           tty->print("[Loaded %s]\n", this_klass->external_name());
3523         }
3524       } else {
3525         ResourceMark rm;
3526         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
3527                    instanceKlass::cast(class_loader->klass())->external_name());
3528       }
3529     }
3530 
3531     if (TraceClassResolution) {
3532       // print out the superclass.
3533       const char * from = Klass::cast(this_klass())->external_name();
3534       if (this_klass->java_super() != NULL) {
3535         tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name());
3536       }
3537       // print out each of the interface classes referred to by this class.
3538       objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
3539       if (!local_interfaces.is_null()) {
3540         int length = local_interfaces->length();
3541         for (int i = 0; i < length; i++) {
3542           klassOop k = klassOop(local_interfaces->obj_at(i));
3543           instanceKlass* to_class = instanceKlass::cast(k);
3544           const char * to = to_class->external_name();
3545           tty->print("RESOLVE %s %s (interface)\n", from, to);
3546         }
3547       }
3548     }
3549 
3550 #ifndef PRODUCT
3551     if( PrintCompactFieldsSavings ) {
3552       if( nonstatic_field_size < orig_nonstatic_field_size ) {
3553         tty->print("[Saved %d of %d bytes in %s]\n",
3554                  (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
3555                  orig_nonstatic_field_size*heapOopSize,
3556                  this_klass->external_name());
3557       } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
3558         tty->print("[Wasted %d over %d bytes in %s]\n",
3559                  (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
3560                  orig_nonstatic_field_size*heapOopSize,
3561                  this_klass->external_name());
3562       }
3563     }
3564 #endif
3565 
3566     // preserve result across HandleMark
3567     preserve_this_klass = this_klass();
3568   }
3569 
3570   // Create new handle outside HandleMark
3571   instanceKlassHandle this_klass (THREAD, preserve_this_klass);
3572   debug_only(this_klass->as_klassOop()->verify();)
3573 
3574   return this_klass;
3575 }
3576 
3577 
3578 unsigned int
3579 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
3580                                        unsigned int nonstatic_oop_map_count,
3581                                        int first_nonstatic_oop_offset) {
3582   unsigned int map_count =
3583     super.is_null() ? 0 : super->nonstatic_oop_map_count();
3584   if (nonstatic_oop_map_count > 0) {
3585     // We have oops to add to map
3586     if (map_count == 0) {
3587       map_count = nonstatic_oop_map_count;
3588     } else {
3589       // Check whether we should add a new map block or whether the last one can
3590       // be extended
3591       OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3592       OopMapBlock* const last_map = first_map + map_count - 1;
3593 
3594       int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3595       if (next_offset == first_nonstatic_oop_offset) {
3596         // There is no gap bettwen superklass's last oop field and first
3597         // local oop field, merge maps.
3598         nonstatic_oop_map_count -= 1;
3599       } else {
3600         // Superklass didn't end with a oop field, add extra maps
3601         assert(next_offset < first_nonstatic_oop_offset, "just checking");
3602       }
3603       map_count += nonstatic_oop_map_count;
3604     }
3605   }
3606   return map_count;
3607 }
3608 
3609 
3610 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
3611                                     unsigned int nonstatic_oop_map_count,
3612                                     int* nonstatic_oop_offsets,
3613                                     unsigned int* nonstatic_oop_counts) {
3614   OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
3615   const instanceKlass* const super = k->superklass();
3616   const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
3617   if (super_count > 0) {
3618     // Copy maps from superklass
3619     OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
3620     for (unsigned int i = 0; i < super_count; ++i) {
3621       *this_oop_map++ = *super_oop_map++;
3622     }
3623   }
3624 
3625   if (nonstatic_oop_map_count > 0) {
3626     if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
3627       // The counts differ because there is no gap between superklass's last oop
3628       // field and the first local oop field.  Extend the last oop map copied
3629       // from the superklass instead of creating new one.
3630       nonstatic_oop_map_count--;
3631       nonstatic_oop_offsets++;
3632       this_oop_map--;
3633       this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
3634       this_oop_map++;
3635     }
3636 
3637     // Add new map blocks, fill them
3638     while (nonstatic_oop_map_count-- > 0) {
3639       this_oop_map->set_offset(*nonstatic_oop_offsets++);
3640       this_oop_map->set_count(*nonstatic_oop_counts++);
3641       this_oop_map++;
3642     }
3643     assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
3644            this_oop_map, "sanity");
3645   }
3646 }
3647 
3648 
3649 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
3650   klassOop super = k->super();
3651 
3652   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
3653   // in which case we don't have to register objects as finalizable
3654   if (!_has_empty_finalizer) {
3655     if (_has_finalizer ||
3656         (super != NULL && super->klass_part()->has_finalizer())) {
3657       k->set_has_finalizer();
3658     }
3659   }
3660 
3661 #ifdef ASSERT
3662   bool f = false;
3663   methodOop m = k->lookup_method(vmSymbols::finalize_method_name(),
3664                                  vmSymbols::void_method_signature());
3665   if (m != NULL && !m->is_empty_method()) {
3666     f = true;
3667   }
3668   assert(f == k->has_finalizer(), "inconsistent has_finalizer");
3669 #endif
3670 
3671   // Check if this klass supports the java.lang.Cloneable interface
3672   if (SystemDictionary::Cloneable_klass_loaded()) {
3673     if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
3674       k->set_is_cloneable();
3675     }
3676   }
3677 
3678   // Check if this klass has a vanilla default constructor
3679   if (super == NULL) {
3680     // java.lang.Object has empty default constructor
3681     k->set_has_vanilla_constructor();
3682   } else {
3683     if (Klass::cast(super)->has_vanilla_constructor() &&
3684         _has_vanilla_constructor) {
3685       k->set_has_vanilla_constructor();
3686     }
3687 #ifdef ASSERT
3688     bool v = false;
3689     if (Klass::cast(super)->has_vanilla_constructor()) {
3690       methodOop constructor = k->find_method(vmSymbols::object_initializer_name(
3691 ), vmSymbols::void_method_signature());
3692       if (constructor != NULL && constructor->is_vanilla_constructor()) {
3693         v = true;
3694       }
3695     }
3696     assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
3697 #endif
3698   }
3699 
3700   // If it cannot be fast-path allocated, set a bit in the layout helper.
3701   // See documentation of instanceKlass::can_be_fastpath_allocated().
3702   assert(k->size_helper() > 0, "layout_helper is initialized");
3703   if ((!RegisterFinalizersAtInit && k->has_finalizer())
3704       || k->is_abstract() || k->is_interface()
3705       || (k->name() == vmSymbols::java_lang_Class()
3706           && k->class_loader() == NULL)
3707       || k->size_helper() >= FastAllocateSizeLimit) {
3708     // Forbid fast-path allocation.
3709     jint lh = Klass::instance_layout_helper(k->size_helper(), true);
3710     k->set_layout_helper(lh);
3711   }
3712 }
3713 
3714 
3715 // utility method for appending and array with check for duplicates
3716 
3717 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
3718   // iterate over new interfaces
3719   for (int i = 0; i < ifs->length(); i++) {
3720     oop e = ifs->obj_at(i);
3721     assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
3722     // check for duplicates
3723     bool duplicate = false;
3724     for (int j = 0; j < index; j++) {
3725       if (result->obj_at(j) == e) {
3726         duplicate = true;
3727         break;
3728       }
3729     }
3730     // add new interface
3731     if (!duplicate) {
3732       result->obj_at_put(index++, e);
3733     }
3734   }
3735 }
3736 
3737 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) {
3738   // Compute maximum size for transitive interfaces
3739   int max_transitive_size = 0;
3740   int super_size = 0;
3741   // Add superclass transitive interfaces size
3742   if (super.not_null()) {
3743     super_size = super->transitive_interfaces()->length();
3744     max_transitive_size += super_size;
3745   }
3746   // Add local interfaces' super interfaces
3747   int local_size = local_ifs->length();
3748   for (int i = 0; i < local_size; i++) {
3749     klassOop l = klassOop(local_ifs->obj_at(i));
3750     max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
3751   }
3752   // Finally add local interfaces
3753   max_transitive_size += local_size;
3754   // Construct array
3755   objArrayHandle result;
3756   if (max_transitive_size == 0) {
3757     // no interfaces, use canonicalized array
3758     result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
3759   } else if (max_transitive_size == super_size) {
3760     // no new local interfaces added, share superklass' transitive interface array
3761     result = objArrayHandle(THREAD, super->transitive_interfaces());
3762   } else if (max_transitive_size == local_size) {
3763     // only local interfaces added, share local interface array
3764     result = local_ifs;
3765   } else {
3766     objArrayHandle nullHandle;
3767     objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
3768     result = objArrayHandle(THREAD, new_objarray);
3769     int index = 0;
3770     // Copy down from superclass
3771     if (super.not_null()) {
3772       append_interfaces(result, index, super->transitive_interfaces());
3773     }
3774     // Copy down from local interfaces' superinterfaces
3775     for (int i = 0; i < local_ifs->length(); i++) {
3776       klassOop l = klassOop(local_ifs->obj_at(i));
3777       append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
3778     }
3779     // Finally add local interfaces
3780     append_interfaces(result, index, local_ifs());
3781 
3782     // Check if duplicates were removed
3783     if (index != max_transitive_size) {
3784       assert(index < max_transitive_size, "just checking");
3785       objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
3786       for (int i = 0; i < index; i++) {
3787         oop e = result->obj_at(i);
3788         assert(e != NULL, "just checking");
3789         new_result->obj_at_put(i, e);
3790       }
3791       result = objArrayHandle(THREAD, new_result);
3792     }
3793   }
3794   return result;
3795 }
3796 
3797 
3798 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
3799   klassOop super = this_klass->super();
3800   if ((super != NULL) &&
3801       (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
3802     ResourceMark rm(THREAD);
3803     Exceptions::fthrow(
3804       THREAD_AND_LOCATION,
3805       vmSymbols::java_lang_IllegalAccessError(),
3806       "class %s cannot access its superclass %s",
3807       this_klass->external_name(),
3808       instanceKlass::cast(super)->external_name()
3809     );
3810     return;
3811   }
3812 }
3813 
3814 
3815 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
3816   objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
3817   int lng = local_interfaces->length();
3818   for (int i = lng - 1; i >= 0; i--) {
3819     klassOop k = klassOop(local_interfaces->obj_at(i));
3820     assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
3821     if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
3822       ResourceMark rm(THREAD);
3823       Exceptions::fthrow(
3824         THREAD_AND_LOCATION,
3825         vmSymbols::java_lang_IllegalAccessError(),
3826         "class %s cannot access its superinterface %s",
3827         this_klass->external_name(),
3828         instanceKlass::cast(k)->external_name()
3829       );
3830       return;
3831     }
3832   }
3833 }
3834 
3835 
3836 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
3837   objArrayHandle methods (THREAD, this_klass->methods());
3838   int num_methods = methods->length();
3839 
3840   // go thru each method and check if it overrides a final method
3841   for (int index = 0; index < num_methods; index++) {
3842     methodOop m = (methodOop)methods->obj_at(index);
3843 
3844     // skip private, static and <init> methods
3845     if ((!m->is_private()) &&
3846         (!m->is_static()) &&
3847         (m->name() != vmSymbols::object_initializer_name())) {
3848 
3849       Symbol* name = m->name();
3850       Symbol* signature = m->signature();
3851       klassOop k = this_klass->super();
3852       methodOop super_m = NULL;
3853       while (k != NULL) {
3854         // skip supers that don't have final methods.
3855         if (k->klass_part()->has_final_method()) {
3856           // lookup a matching method in the super class hierarchy
3857           super_m = instanceKlass::cast(k)->lookup_method(name, signature);
3858           if (super_m == NULL) {
3859             break; // didn't find any match; get out
3860           }
3861 
3862           if (super_m->is_final() &&
3863               // matching method in super is final
3864               (Reflection::verify_field_access(this_klass->as_klassOop(),
3865                                                super_m->method_holder(),
3866                                                super_m->method_holder(),
3867                                                super_m->access_flags(), false))
3868             // this class can access super final method and therefore override
3869             ) {
3870             ResourceMark rm(THREAD);
3871             Exceptions::fthrow(
3872               THREAD_AND_LOCATION,
3873               vmSymbols::java_lang_VerifyError(),
3874               "class %s overrides final method %s.%s",
3875               this_klass->external_name(),
3876               name->as_C_string(),
3877               signature->as_C_string()
3878             );
3879             return;
3880           }
3881 
3882           // continue to look from super_m's holder's super.
3883           k = instanceKlass::cast(super_m->method_holder())->super();
3884           continue;
3885         }
3886 
3887         k = k->klass_part()->super();
3888       }
3889     }
3890   }
3891 }
3892 
3893 
3894 // assumes that this_klass is an interface
3895 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
3896   assert(this_klass->is_interface(), "not an interface");
3897   objArrayHandle methods (THREAD, this_klass->methods());
3898   int num_methods = methods->length();
3899 
3900   for (int index = 0; index < num_methods; index++) {
3901     methodOop m = (methodOop)methods->obj_at(index);
3902     // if m is static and not the init method, throw a verify error
3903     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
3904       ResourceMark rm(THREAD);
3905       Exceptions::fthrow(
3906         THREAD_AND_LOCATION,
3907         vmSymbols::java_lang_VerifyError(),
3908         "Illegal static method %s in interface %s",
3909         m->name()->as_C_string(),
3910         this_klass->external_name()
3911       );
3912       return;
3913     }
3914   }
3915 }
3916 
3917 // utility methods for format checking
3918 
3919 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
3920   if (!_need_verify) { return; }
3921 
3922   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
3923   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
3924   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
3925   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
3926   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
3927   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
3928   const bool major_gte_15  = _major_version >= JAVA_1_5_VERSION;
3929 
3930   if ((is_abstract && is_final) ||
3931       (is_interface && !is_abstract) ||
3932       (is_interface && major_gte_15 && (is_super || is_enum)) ||
3933       (!is_interface && major_gte_15 && is_annotation)) {
3934     ResourceMark rm(THREAD);
3935     Exceptions::fthrow(
3936       THREAD_AND_LOCATION,
3937       vmSymbols::java_lang_ClassFormatError(),
3938       "Illegal class modifiers in class %s: 0x%X",
3939       _class_name->as_C_string(), flags
3940     );
3941     return;
3942   }
3943 }
3944 
3945 bool ClassFileParser::has_illegal_visibility(jint flags) {
3946   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
3947   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
3948   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
3949 
3950   return ((is_public && is_protected) ||
3951           (is_public && is_private) ||
3952           (is_protected && is_private));
3953 }
3954 
3955 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
3956   u2 max_version =
3957     JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
3958     (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
3959   return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
3960          (major <= max_version) &&
3961          ((major != max_version) ||
3962           (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
3963 }
3964 
3965 void ClassFileParser::verify_legal_field_modifiers(
3966     jint flags, bool is_interface, TRAPS) {
3967   if (!_need_verify) { return; }
3968 
3969   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
3970   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
3971   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
3972   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
3973   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
3974   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
3975   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
3976   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
3977   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
3978 
3979   bool is_illegal = false;
3980 
3981   if (is_interface) {
3982     if (!is_public || !is_static || !is_final || is_private ||
3983         is_protected || is_volatile || is_transient ||
3984         (major_gte_15 && is_enum)) {
3985       is_illegal = true;
3986     }
3987   } else { // not interface
3988     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
3989       is_illegal = true;
3990     }
3991   }
3992 
3993   if (is_illegal) {
3994     ResourceMark rm(THREAD);
3995     Exceptions::fthrow(
3996       THREAD_AND_LOCATION,
3997       vmSymbols::java_lang_ClassFormatError(),
3998       "Illegal field modifiers in class %s: 0x%X",
3999       _class_name->as_C_string(), flags);
4000     return;
4001   }
4002 }
4003 
4004 void ClassFileParser::verify_legal_method_modifiers(
4005     jint flags, bool is_interface, Symbol* name, TRAPS) {
4006   if (!_need_verify) { return; }
4007 
4008   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
4009   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
4010   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
4011   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
4012   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
4013   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
4014   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
4015   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
4016   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4017   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
4018   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
4019 
4020   bool is_illegal = false;
4021 
4022   if (is_interface) {
4023     if (!is_abstract || !is_public || is_static || is_final ||
4024         is_native || (major_gte_15 && (is_synchronized || is_strict))) {
4025       is_illegal = true;
4026     }
4027   } else { // not interface
4028     if (is_initializer) {
4029       if (is_static || is_final || is_synchronized || is_native ||
4030           is_abstract || (major_gte_15 && is_bridge)) {
4031         is_illegal = true;
4032       }
4033     } else { // not initializer
4034       if (is_abstract) {
4035         if ((is_final || is_native || is_private || is_static ||
4036             (major_gte_15 && (is_synchronized || is_strict)))) {
4037           is_illegal = true;
4038         }
4039       }
4040       if (has_illegal_visibility(flags)) {
4041         is_illegal = true;
4042       }
4043     }
4044   }
4045 
4046   if (is_illegal) {
4047     ResourceMark rm(THREAD);
4048     Exceptions::fthrow(
4049       THREAD_AND_LOCATION,
4050       vmSymbols::java_lang_ClassFormatError(),
4051       "Method %s in class %s has illegal modifiers: 0x%X",
4052       name->as_C_string(), _class_name->as_C_string(), flags);
4053     return;
4054   }
4055 }
4056 
4057 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
4058   assert(_need_verify, "only called when _need_verify is true");
4059   int i = 0;
4060   int count = length >> 2;
4061   for (int k=0; k<count; k++) {
4062     unsigned char b0 = buffer[i];
4063     unsigned char b1 = buffer[i+1];
4064     unsigned char b2 = buffer[i+2];
4065     unsigned char b3 = buffer[i+3];
4066     // For an unsigned char v,
4067     // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
4068     // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
4069     unsigned char res = b0 | b0 - 1 |
4070                         b1 | b1 - 1 |
4071                         b2 | b2 - 1 |
4072                         b3 | b3 - 1;
4073     if (res >= 128) break;
4074     i += 4;
4075   }
4076   for(; i < length; i++) {
4077     unsigned short c;
4078     // no embedded zeros
4079     guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
4080     if(buffer[i] < 128) {
4081       continue;
4082     }
4083     if ((i + 5) < length) { // see if it's legal supplementary character
4084       if (UTF8::is_supplementary_character(&buffer[i])) {
4085         c = UTF8::get_supplementary_character(&buffer[i]);
4086         i += 5;
4087         continue;
4088       }
4089     }
4090     switch (buffer[i] >> 4) {
4091       default: break;
4092       case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
4093         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4094       case 0xC: case 0xD:  // 110xxxxx  10xxxxxx
4095         c = (buffer[i] & 0x1F) << 6;
4096         i++;
4097         if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
4098           c += buffer[i] & 0x3F;
4099           if (_major_version <= 47 || c == 0 || c >= 0x80) {
4100             // for classes with major > 47, c must a null or a character in its shortest form
4101             break;
4102           }
4103         }
4104         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4105       case 0xE:  // 1110xxxx 10xxxxxx 10xxxxxx
4106         c = (buffer[i] & 0xF) << 12;
4107         i += 2;
4108         if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
4109           c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
4110           if (_major_version <= 47 || c >= 0x800) {
4111             // for classes with major > 47, c must be in its shortest form
4112             break;
4113           }
4114         }
4115         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4116     }  // end of switch
4117   } // end of for
4118 }
4119 
4120 // Checks if name is a legal class name.
4121 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
4122   if (!_need_verify || _relax_verify) { return; }
4123 
4124   char buf[fixed_buffer_size];
4125   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4126   unsigned int length = name->utf8_length();
4127   bool legal = false;
4128 
4129   if (length > 0) {
4130     char* p;
4131     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4132       p = skip_over_field_signature(bytes, false, length, CHECK);
4133       legal = (p != NULL) && ((p - bytes) == (int)length);
4134     } else if (_major_version < JAVA_1_5_VERSION) {
4135       if (bytes[0] != '<') {
4136         p = skip_over_field_name(bytes, true, length);
4137         legal = (p != NULL) && ((p - bytes) == (int)length);
4138       }
4139     } else {
4140       // 4900761: relax the constraints based on JSR202 spec
4141       // Class names may be drawn from the entire Unicode character set.
4142       // Identifiers between '/' must be unqualified names.
4143       // The utf8 string has been verified when parsing cpool entries.
4144       legal = verify_unqualified_name(bytes, length, LegalClass);
4145     }
4146   }
4147   if (!legal) {
4148     ResourceMark rm(THREAD);
4149     Exceptions::fthrow(
4150       THREAD_AND_LOCATION,
4151       vmSymbols::java_lang_ClassFormatError(),
4152       "Illegal class name \"%s\" in class file %s", bytes,
4153       _class_name->as_C_string()
4154     );
4155     return;
4156   }
4157 }
4158 
4159 // Checks if name is a legal field name.
4160 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
4161   if (!_need_verify || _relax_verify) { return; }
4162 
4163   char buf[fixed_buffer_size];
4164   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4165   unsigned int length = name->utf8_length();
4166   bool legal = false;
4167 
4168   if (length > 0) {
4169     if (_major_version < JAVA_1_5_VERSION) {
4170       if (bytes[0] != '<') {
4171         char* p = skip_over_field_name(bytes, false, length);
4172         legal = (p != NULL) && ((p - bytes) == (int)length);
4173       }
4174     } else {
4175       // 4881221: relax the constraints based on JSR202 spec
4176       legal = verify_unqualified_name(bytes, length, LegalField);
4177     }
4178   }
4179 
4180   if (!legal) {
4181     ResourceMark rm(THREAD);
4182     Exceptions::fthrow(
4183       THREAD_AND_LOCATION,
4184       vmSymbols::java_lang_ClassFormatError(),
4185       "Illegal field name \"%s\" in class %s", bytes,
4186       _class_name->as_C_string()
4187     );
4188     return;
4189   }
4190 }
4191 
4192 // Checks if name is a legal method name.
4193 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
4194   if (!_need_verify || _relax_verify) { return; }
4195 
4196   assert(name != NULL, "method name is null");
4197   char buf[fixed_buffer_size];
4198   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4199   unsigned int length = name->utf8_length();
4200   bool legal = false;
4201 
4202   if (length > 0) {
4203     if (bytes[0] == '<') {
4204       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4205         legal = true;
4206       }
4207     } else if (_major_version < JAVA_1_5_VERSION) {
4208       char* p;
4209       p = skip_over_field_name(bytes, false, length);
4210       legal = (p != NULL) && ((p - bytes) == (int)length);
4211     } else {
4212       // 4881221: relax the constraints based on JSR202 spec
4213       legal = verify_unqualified_name(bytes, length, LegalMethod);
4214     }
4215   }
4216 
4217   if (!legal) {
4218     ResourceMark rm(THREAD);
4219     Exceptions::fthrow(
4220       THREAD_AND_LOCATION,
4221       vmSymbols::java_lang_ClassFormatError(),
4222       "Illegal method name \"%s\" in class %s", bytes,
4223       _class_name->as_C_string()
4224     );
4225     return;
4226   }
4227 }
4228 
4229 
4230 // Checks if signature is a legal field signature.
4231 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
4232   if (!_need_verify) { return; }
4233 
4234   char buf[fixed_buffer_size];
4235   char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4236   unsigned int length = signature->utf8_length();
4237   char* p = skip_over_field_signature(bytes, false, length, CHECK);
4238 
4239   if (p == NULL || (p - bytes) != (int)length) {
4240     throwIllegalSignature("Field", name, signature, CHECK);
4241   }
4242 }
4243 
4244 // Checks if signature is a legal method signature.
4245 // Returns number of parameters
4246 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
4247   if (!_need_verify) {
4248     // make sure caller's args_size will be less than 0 even for non-static
4249     // method so it will be recomputed in compute_size_of_parameters().
4250     return -2;
4251   }
4252 
4253   unsigned int args_size = 0;
4254   char buf[fixed_buffer_size];
4255   char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4256   unsigned int length = signature->utf8_length();
4257   char* nextp;
4258 
4259   // The first character must be a '('
4260   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
4261     length--;
4262     // Skip over legal field signatures
4263     nextp = skip_over_field_signature(p, false, length, CHECK_0);
4264     while ((length > 0) && (nextp != NULL)) {
4265       args_size++;
4266       if (p[0] == 'J' || p[0] == 'D') {
4267         args_size++;
4268       }
4269       length -= nextp - p;
4270       p = nextp;
4271       nextp = skip_over_field_signature(p, false, length, CHECK_0);
4272     }
4273     // The first non-signature thing better be a ')'
4274     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
4275       length--;
4276       if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
4277         // All internal methods must return void
4278         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
4279           return args_size;
4280         }
4281       } else {
4282         // Now we better just have a return value
4283         nextp = skip_over_field_signature(p, true, length, CHECK_0);
4284         if (nextp && ((int)length == (nextp - p))) {
4285           return args_size;
4286         }
4287       }
4288     }
4289   }
4290   // Report error
4291   throwIllegalSignature("Method", name, signature, CHECK_0);
4292   return 0;
4293 }
4294 
4295 
4296 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4297 // Method names also may not contain the characters '<' or '>', unless <init>
4298 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
4299 // method.  Because these names have been checked as special cases before
4300 // calling this method in verify_legal_method_name.
4301 bool ClassFileParser::verify_unqualified_name(
4302     char* name, unsigned int length, int type) {
4303   jchar ch;
4304 
4305   for (char* p = name; p != name + length; ) {
4306     ch = *p;
4307     if (ch < 128) {
4308       p++;
4309       if (ch == '.' || ch == ';' || ch == '[' ) {
4310         return false;   // do not permit '.', ';', or '['
4311       }
4312       if (type != LegalClass && ch == '/') {
4313         return false;   // do not permit '/' unless it's class name
4314       }
4315       if (type == LegalMethod && (ch == '<' || ch == '>')) {
4316         return false;   // do not permit '<' or '>' in method names
4317       }
4318     } else {
4319       char* tmp_p = UTF8::next(p, &ch);
4320       p = tmp_p;
4321     }
4322   }
4323   return true;
4324 }
4325 
4326 
4327 // Take pointer to a string. Skip over the longest part of the string that could
4328 // be taken as a fieldname. Allow '/' if slash_ok is true.
4329 // Return a pointer to just past the fieldname.
4330 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4331 // being true, we saw consecutive slashes (meaning we were looking for a
4332 // qualified path but found something that was badly-formed).
4333 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
4334   char* p;
4335   jchar ch;
4336   jboolean last_is_slash = false;
4337   jboolean not_first_ch = false;
4338 
4339   for (p = name; p != name + length; not_first_ch = true) {
4340     char* old_p = p;
4341     ch = *p;
4342     if (ch < 128) {
4343       p++;
4344       // quick check for ascii
4345       if ((ch >= 'a' && ch <= 'z') ||
4346           (ch >= 'A' && ch <= 'Z') ||
4347           (ch == '_' || ch == '$') ||
4348           (not_first_ch && ch >= '0' && ch <= '9')) {
4349         last_is_slash = false;
4350         continue;
4351       }
4352       if (slash_ok && ch == '/') {
4353         if (last_is_slash) {
4354           return NULL;  // Don't permit consecutive slashes
4355         }
4356         last_is_slash = true;
4357         continue;
4358       }
4359     } else {
4360       jint unicode_ch;
4361       char* tmp_p = UTF8::next_character(p, &unicode_ch);
4362       p = tmp_p;
4363       last_is_slash = false;
4364       // Check if ch is Java identifier start or is Java identifier part
4365       // 4672820: call java.lang.Character methods directly without generating separate tables.
4366       EXCEPTION_MARK;
4367       instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
4368 
4369       // return value
4370       JavaValue result(T_BOOLEAN);
4371       // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4372       JavaCallArguments args;
4373       args.push_int(unicode_ch);
4374 
4375       // public static boolean isJavaIdentifierStart(char ch);
4376       JavaCalls::call_static(&result,
4377                              klass,
4378                              vmSymbols::isJavaIdentifierStart_name(),
4379                              vmSymbols::int_bool_signature(),
4380                              &args,
4381                              THREAD);
4382 
4383       if (HAS_PENDING_EXCEPTION) {
4384         CLEAR_PENDING_EXCEPTION;
4385         return 0;
4386       }
4387       if (result.get_jboolean()) {
4388         continue;
4389       }
4390 
4391       if (not_first_ch) {
4392         // public static boolean isJavaIdentifierPart(char ch);
4393         JavaCalls::call_static(&result,
4394                                klass,
4395                                vmSymbols::isJavaIdentifierPart_name(),
4396                                vmSymbols::int_bool_signature(),
4397                                &args,
4398                                THREAD);
4399 
4400         if (HAS_PENDING_EXCEPTION) {
4401           CLEAR_PENDING_EXCEPTION;
4402           return 0;
4403         }
4404 
4405         if (result.get_jboolean()) {
4406           continue;
4407         }
4408       }
4409     }
4410     return (not_first_ch) ? old_p : NULL;
4411   }
4412   return (not_first_ch) ? p : NULL;
4413 }
4414 
4415 
4416 // Take pointer to a string. Skip over the longest part of the string that could
4417 // be taken as a field signature. Allow "void" if void_ok.
4418 // Return a pointer to just past the signature.
4419 // Return NULL if no legal signature is found.
4420 char* ClassFileParser::skip_over_field_signature(char* signature,
4421                                                  bool void_ok,
4422                                                  unsigned int length,
4423                                                  TRAPS) {
4424   unsigned int array_dim = 0;
4425   while (length > 0) {
4426     switch (signature[0]) {
4427       case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4428       case JVM_SIGNATURE_BOOLEAN:
4429       case JVM_SIGNATURE_BYTE:
4430       case JVM_SIGNATURE_CHAR:
4431       case JVM_SIGNATURE_SHORT:
4432       case JVM_SIGNATURE_INT:
4433       case JVM_SIGNATURE_FLOAT:
4434       case JVM_SIGNATURE_LONG:
4435       case JVM_SIGNATURE_DOUBLE:
4436         return signature + 1;
4437       case JVM_SIGNATURE_CLASS: {
4438         if (_major_version < JAVA_1_5_VERSION) {
4439           // Skip over the class name if one is there
4440           char* p = skip_over_field_name(signature + 1, true, --length);
4441 
4442           // The next character better be a semicolon
4443           if (p && (p - signature) > 1 && p[0] == ';') {
4444             return p + 1;
4445           }
4446         } else {
4447           // 4900761: For class version > 48, any unicode is allowed in class name.
4448           length--;
4449           signature++;
4450           while (length > 0 && signature[0] != ';') {
4451             if (signature[0] == '.') {
4452               classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4453             }
4454             length--;
4455             signature++;
4456           }
4457           if (signature[0] == ';') { return signature + 1; }
4458         }
4459 
4460         return NULL;
4461       }
4462       case JVM_SIGNATURE_ARRAY:
4463         array_dim++;
4464         if (array_dim > 255) {
4465           // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4466           classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4467         }
4468         // The rest of what's there better be a legal signature
4469         signature++;
4470         length--;
4471         void_ok = false;
4472         break;
4473 
4474       default:
4475         return NULL;
4476     }
4477   }
4478   return NULL;
4479 }