1 /*
   2  * Copyright (c) 1997, 2016, 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 #include "precompiled.hpp"
  25 #include "classfile/classFileParser.hpp"
  26 #include "classfile/classFileStream.hpp"
  27 #include "classfile/classLoader.hpp"
  28 #include "classfile/classLoaderData.inline.hpp"
  29 #include "classfile/defaultMethods.hpp"
  30 #include "classfile/javaClasses.inline.hpp"
  31 #include "classfile/moduleEntry.hpp"
  32 #include "classfile/symbolTable.hpp"
  33 #include "classfile/systemDictionary.hpp"
  34 #include "classfile/verificationType.hpp"
  35 #include "classfile/verifier.hpp"
  36 #include "classfile/vmSymbols.hpp"
  37 #include "gc/shared/gcLocker.hpp"
  38 #include "logging/log.hpp"
  39 #include "memory/allocation.hpp"
  40 #include "memory/metadataFactory.hpp"
  41 #include "memory/oopFactory.hpp"
  42 #include "memory/resourceArea.hpp"
  43 #include "memory/universe.inline.hpp"
  44 #include "oops/annotations.hpp"
  45 #include "oops/fieldStreams.hpp"
  46 #include "oops/instanceKlass.hpp"
  47 #include "oops/instanceMirrorKlass.hpp"
  48 #include "oops/klass.inline.hpp"
  49 #include "oops/klassVtable.hpp"
  50 #include "oops/metadata.hpp"
  51 #include "oops/method.hpp"
  52 #include "oops/oop.inline.hpp"
  53 #include "oops/symbol.hpp"
  54 #include "prims/jvm.h"
  55 #include "prims/jvmtiExport.hpp"
  56 #include "prims/jvmtiThreadState.hpp"
  57 #include "runtime/javaCalls.hpp"
  58 #include "runtime/perfData.hpp"
  59 #include "runtime/reflection.hpp"
  60 #include "runtime/signature.hpp"
  61 #include "runtime/timer.hpp"
  62 #include "services/classLoadingService.hpp"
  63 #include "services/threadService.hpp"
  64 #include "trace/traceMacros.hpp"
  65 #include "utilities/array.hpp"
  66 #include "utilities/exceptions.hpp"
  67 #include "utilities/globalDefinitions.hpp"
  68 #include "utilities/macros.hpp"
  69 #include "utilities/ostream.hpp"
  70 #include "utilities/resourceHash.hpp"
  71 #if INCLUDE_CDS
  72 #include "classfile/systemDictionaryShared.hpp"
  73 #endif
  74 
  75 // We generally try to create the oops directly when parsing, rather than
  76 // allocating temporary data structures and copying the bytes twice. A
  77 // temporary area is only needed when parsing utf8 entries in the constant
  78 // pool and when parsing line number tables.
  79 
  80 // We add assert in debug mode when class format is not checked.
  81 
  82 #define JAVA_CLASSFILE_MAGIC              0xCAFEBABE
  83 #define JAVA_MIN_SUPPORTED_VERSION        45
  84 #define JAVA_MAX_SUPPORTED_VERSION        53
  85 #define JAVA_MAX_SUPPORTED_MINOR_VERSION  0
  86 
  87 // Used for two backward compatibility reasons:
  88 // - to check for new additions to the class file format in JDK1.5
  89 // - to check for bug fixes in the format checker in JDK1.5
  90 #define JAVA_1_5_VERSION                  49
  91 
  92 // Used for backward compatibility reasons:
  93 // - to check for javac bug fixes that happened after 1.5
  94 // - also used as the max version when running in jdk6
  95 #define JAVA_6_VERSION                    50
  96 
  97 // Used for backward compatibility reasons:
  98 // - to check NameAndType_info signatures more aggressively
  99 // - to disallow argument and require ACC_STATIC for <clinit> methods
 100 #define JAVA_7_VERSION                    51
 101 
 102 // Extension method support.
 103 #define JAVA_8_VERSION                    52
 104 
 105 #define JAVA_9_VERSION                    53
 106 
 107 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
 108                                                   ConstantPool* cp,
 109                                                   const int length,
 110                                                   TRAPS) {
 111   assert(stream != NULL, "invariant");
 112   assert(cp != NULL, "invariant");
 113 
 114   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
 115   // this function (_current can be allocated in a register, with scalar
 116   // replacement of aggregates). The _current pointer is copied back to
 117   // stream() when this function returns. DON'T call another method within
 118   // this method that uses stream().
 119   const ClassFileStream cfs1 = *stream;
 120   const ClassFileStream* const cfs = &cfs1;
 121 
 122   assert(cfs->allocated_on_stack(), "should be local");
 123   debug_only(const u1* const old_current = stream->current();)
 124 
 125   // Used for batching symbol allocations.
 126   const char* names[SymbolTable::symbol_alloc_batch_size];
 127   int lengths[SymbolTable::symbol_alloc_batch_size];
 128   int indices[SymbolTable::symbol_alloc_batch_size];
 129   unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
 130   int names_count = 0;
 131 
 132   // parsing  Index 0 is unused
 133   for (int index = 1; index < length; index++) {
 134     // Each of the following case guarantees one more byte in the stream
 135     // for the following tag or the access_flags following constant pool,
 136     // so we don't need bounds-check for reading tag.
 137     const u1 tag = cfs->get_u1_fast();
 138     switch (tag) {
 139       case JVM_CONSTANT_Class : {
 140         cfs->guarantee_more(3, CHECK);  // name_index, tag/access_flags
 141         const u2 name_index = cfs->get_u2_fast();
 142         cp->klass_index_at_put(index, name_index);
 143         break;
 144       }
 145       case JVM_CONSTANT_Fieldref: {
 146         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 147         const u2 class_index = cfs->get_u2_fast();
 148         const u2 name_and_type_index = cfs->get_u2_fast();
 149         cp->field_at_put(index, class_index, name_and_type_index);
 150         break;
 151       }
 152       case JVM_CONSTANT_Methodref: {
 153         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 154         const u2 class_index = cfs->get_u2_fast();
 155         const u2 name_and_type_index = cfs->get_u2_fast();
 156         cp->method_at_put(index, class_index, name_and_type_index);
 157         break;
 158       }
 159       case JVM_CONSTANT_InterfaceMethodref: {
 160         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 161         const u2 class_index = cfs->get_u2_fast();
 162         const u2 name_and_type_index = cfs->get_u2_fast();
 163         cp->interface_method_at_put(index, class_index, name_and_type_index);
 164         break;
 165       }
 166       case JVM_CONSTANT_String : {
 167         cfs->guarantee_more(3, CHECK);  // string_index, tag/access_flags
 168         const u2 string_index = cfs->get_u2_fast();
 169         cp->string_index_at_put(index, string_index);
 170         break;
 171       }
 172       case JVM_CONSTANT_MethodHandle :
 173       case JVM_CONSTANT_MethodType: {
 174         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 175           classfile_parse_error(
 176             "Class file version does not support constant tag %u in class file %s",
 177             tag, CHECK);
 178         }
 179         if (tag == JVM_CONSTANT_MethodHandle) {
 180           cfs->guarantee_more(4, CHECK);  // ref_kind, method_index, tag/access_flags
 181           const u1 ref_kind = cfs->get_u1_fast();
 182           const u2 method_index = cfs->get_u2_fast();
 183           cp->method_handle_index_at_put(index, ref_kind, method_index);
 184         }
 185         else if (tag == JVM_CONSTANT_MethodType) {
 186           cfs->guarantee_more(3, CHECK);  // signature_index, tag/access_flags
 187           const u2 signature_index = cfs->get_u2_fast();
 188           cp->method_type_index_at_put(index, signature_index);
 189         }
 190         else {
 191           ShouldNotReachHere();
 192         }
 193         break;
 194       }
 195       case JVM_CONSTANT_InvokeDynamic : {
 196         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 197           classfile_parse_error(
 198               "Class file version does not support constant tag %u in class file %s",
 199               tag, CHECK);
 200         }
 201         cfs->guarantee_more(5, CHECK);  // bsm_index, nt, tag/access_flags
 202         const u2 bootstrap_specifier_index = cfs->get_u2_fast();
 203         const u2 name_and_type_index = cfs->get_u2_fast();
 204         if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
 205           _max_bootstrap_specifier_index = (int) bootstrap_specifier_index;  // collect for later
 206         }
 207         cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
 208         break;
 209       }
 210       case JVM_CONSTANT_Integer: {
 211         cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 212         const u4 bytes = cfs->get_u4_fast();
 213         cp->int_at_put(index, (jint)bytes);
 214         break;
 215       }
 216       case JVM_CONSTANT_Float: {
 217         cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 218         const u4 bytes = cfs->get_u4_fast();
 219         cp->float_at_put(index, *(jfloat*)&bytes);
 220         break;
 221       }
 222       case JVM_CONSTANT_Long: {
 223         // A mangled type might cause you to overrun allocated memory
 224         guarantee_property(index + 1 < length,
 225                            "Invalid constant pool entry %u in class file %s",
 226                            index,
 227                            CHECK);
 228         cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 229         const u8 bytes = cfs->get_u8_fast();
 230         cp->long_at_put(index, bytes);
 231         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 232         break;
 233       }
 234       case JVM_CONSTANT_Double: {
 235         // A mangled type might cause you to overrun allocated memory
 236         guarantee_property(index+1 < length,
 237                            "Invalid constant pool entry %u in class file %s",
 238                            index,
 239                            CHECK);
 240         cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 241         const u8 bytes = cfs->get_u8_fast();
 242         cp->double_at_put(index, *(jdouble*)&bytes);
 243         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 244         break;
 245       }
 246       case JVM_CONSTANT_NameAndType: {
 247         cfs->guarantee_more(5, CHECK);  // name_index, signature_index, tag/access_flags
 248         const u2 name_index = cfs->get_u2_fast();
 249         const u2 signature_index = cfs->get_u2_fast();
 250         cp->name_and_type_at_put(index, name_index, signature_index);
 251         break;
 252       }
 253       case JVM_CONSTANT_Utf8 : {
 254         cfs->guarantee_more(2, CHECK);  // utf8_length
 255         u2  utf8_length = cfs->get_u2_fast();
 256         const u1* utf8_buffer = cfs->get_u1_buffer();
 257         assert(utf8_buffer != NULL, "null utf8 buffer");
 258         // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
 259         cfs->guarantee_more(utf8_length+1, CHECK);  // utf8 string, tag/access_flags
 260         cfs->skip_u1_fast(utf8_length);
 261 
 262         // Before storing the symbol, make sure it's legal
 263         if (_need_verify) {
 264           verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
 265         }
 266 
 267         if (has_cp_patch_at(index)) {
 268           Handle patch = clear_cp_patch_at(index);
 269           guarantee_property(java_lang_String::is_instance(patch()),
 270                              "Illegal utf8 patch at %d in class file %s",
 271                              index,
 272                              CHECK);
 273           const char* const str = java_lang_String::as_utf8_string(patch());
 274           // (could use java_lang_String::as_symbol instead, but might as well batch them)
 275           utf8_buffer = (const u1*) str;
 276           utf8_length = (int) strlen(str);
 277         }
 278 
 279         unsigned int hash;
 280         Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
 281                                                         utf8_length,
 282                                                         hash);
 283         if (result == NULL) {
 284           names[names_count] = (const char*)utf8_buffer;
 285           lengths[names_count] = utf8_length;
 286           indices[names_count] = index;
 287           hashValues[names_count++] = hash;
 288           if (names_count == SymbolTable::symbol_alloc_batch_size) {
 289             SymbolTable::new_symbols(_loader_data,
 290                                      cp,
 291                                      names_count,
 292                                      names,
 293                                      lengths,
 294                                      indices,
 295                                      hashValues,
 296                                      CHECK);
 297             names_count = 0;
 298           }
 299         } else {
 300           cp->symbol_at_put(index, result);
 301         }
 302         break;
 303       }
 304       default: {
 305         classfile_parse_error("Unknown constant tag %u in class file %s",
 306                               tag,
 307                               CHECK);
 308         break;
 309       }
 310     } // end of switch(tag)
 311   } // end of for
 312 
 313   // Allocate the remaining symbols
 314   if (names_count > 0) {
 315     SymbolTable::new_symbols(_loader_data,
 316                              cp,
 317                              names_count,
 318                              names,
 319                              lengths,
 320                              indices,
 321                              hashValues,
 322                              CHECK);
 323   }
 324 
 325   // Copy _current pointer of local copy back to stream.
 326   assert(stream->current() == old_current, "non-exclusive use of stream");
 327   stream->set_current(cfs1.current());
 328 
 329 }
 330 
 331 static inline bool valid_cp_range(int index, int length) {
 332   return (index > 0 && index < length);
 333 }
 334 
 335 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
 336   assert(cp != NULL, "invariant");
 337   if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
 338     return cp->symbol_at(index);
 339   }
 340   return NULL;
 341 }
 342 
 343 #ifdef ASSERT
 344 PRAGMA_DIAG_PUSH
 345 PRAGMA_FORMAT_NONLITERAL_IGNORED
 346 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
 347   ResourceMark rm(THREAD);
 348   fatal(msg, _class_name->as_C_string());
 349 }
 350 
 351 void ClassFileParser::report_assert_property_failure(const char* msg,
 352                                                      int index,
 353                                                      TRAPS) const {
 354   ResourceMark rm(THREAD);
 355   fatal(msg, index, _class_name->as_C_string());
 356 }
 357 PRAGMA_DIAG_POP
 358 #endif
 359 
 360 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
 361                                           ConstantPool* const cp,
 362                                           const int length,
 363                                           TRAPS) {
 364   assert(cp != NULL, "invariant");
 365   assert(stream != NULL, "invariant");
 366 
 367   // parsing constant pool entries
 368   parse_constant_pool_entries(stream, cp, length, CHECK);
 369 
 370   int index = 1;  // declared outside of loops for portability
 371 
 372   // first verification pass - validate cross references
 373   // and fixup class and string constants
 374   for (index = 1; index < length; index++) {          // Index 0 is unused
 375     const jbyte tag = cp->tag_at(index).value();
 376     switch (tag) {
 377       case JVM_CONSTANT_Class: {
 378         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 379         break;
 380       }
 381       case JVM_CONSTANT_Fieldref:
 382         // fall through
 383       case JVM_CONSTANT_Methodref:
 384         // fall through
 385       case JVM_CONSTANT_InterfaceMethodref: {
 386         if (!_need_verify) break;
 387         const int klass_ref_index = cp->klass_ref_index_at(index);
 388         const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
 389         check_property(valid_klass_reference_at(klass_ref_index),
 390                        "Invalid constant pool index %u in class file %s",
 391                        klass_ref_index, CHECK);
 392         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 393           cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 394           "Invalid constant pool index %u in class file %s",
 395           name_and_type_ref_index, CHECK);
 396         break;
 397       }
 398       case JVM_CONSTANT_String: {
 399         ShouldNotReachHere();     // Only JVM_CONSTANT_StringIndex should be present
 400         break;
 401       }
 402       case JVM_CONSTANT_Integer:
 403         break;
 404       case JVM_CONSTANT_Float:
 405         break;
 406       case JVM_CONSTANT_Long:
 407       case JVM_CONSTANT_Double: {
 408         index++;
 409         check_property(
 410           (index < length && cp->tag_at(index).is_invalid()),
 411           "Improper constant pool long/double index %u in class file %s",
 412           index, CHECK);
 413         break;
 414       }
 415       case JVM_CONSTANT_NameAndType: {
 416         if (!_need_verify) break;
 417         const int name_ref_index = cp->name_ref_index_at(index);
 418         const int signature_ref_index = cp->signature_ref_index_at(index);
 419         check_property(valid_symbol_at(name_ref_index),
 420           "Invalid constant pool index %u in class file %s",
 421           name_ref_index, CHECK);
 422         check_property(valid_symbol_at(signature_ref_index),
 423           "Invalid constant pool index %u in class file %s",
 424           signature_ref_index, CHECK);
 425         break;
 426       }
 427       case JVM_CONSTANT_Utf8:
 428         break;
 429       case JVM_CONSTANT_UnresolvedClass:         // fall-through
 430       case JVM_CONSTANT_UnresolvedClassInError: {
 431         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 432         break;
 433       }
 434       case JVM_CONSTANT_ClassIndex: {
 435         const int class_index = cp->klass_index_at(index);
 436         check_property(valid_symbol_at(class_index),
 437           "Invalid constant pool index %u in class file %s",
 438           class_index, CHECK);
 439         cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
 440         break;
 441       }
 442       case JVM_CONSTANT_StringIndex: {
 443         const int string_index = cp->string_index_at(index);
 444         check_property(valid_symbol_at(string_index),
 445           "Invalid constant pool index %u in class file %s",
 446           string_index, CHECK);
 447         Symbol* const sym = cp->symbol_at(string_index);
 448         cp->unresolved_string_at_put(index, sym);
 449         break;
 450       }
 451       case JVM_CONSTANT_MethodHandle: {
 452         const int ref_index = cp->method_handle_index_at(index);
 453         check_property(valid_cp_range(ref_index, length),
 454           "Invalid constant pool index %u in class file %s",
 455           ref_index, CHECK);
 456         const constantTag tag = cp->tag_at(ref_index);
 457         const int ref_kind = cp->method_handle_ref_kind_at(index);
 458 
 459         switch (ref_kind) {
 460           case JVM_REF_getField:
 461           case JVM_REF_getStatic:
 462           case JVM_REF_putField:
 463           case JVM_REF_putStatic: {
 464             check_property(
 465               tag.is_field(),
 466               "Invalid constant pool index %u in class file %s (not a field)",
 467               ref_index, CHECK);
 468             break;
 469           }
 470           case JVM_REF_invokeVirtual:
 471           case JVM_REF_newInvokeSpecial: {
 472             check_property(
 473               tag.is_method(),
 474               "Invalid constant pool index %u in class file %s (not a method)",
 475               ref_index, CHECK);
 476             break;
 477           }
 478           case JVM_REF_invokeStatic:
 479           case JVM_REF_invokeSpecial: {
 480             check_property(
 481               tag.is_method() ||
 482               ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
 483               "Invalid constant pool index %u in class file %s (not a method)",
 484               ref_index, CHECK);
 485             break;
 486           }
 487           case JVM_REF_invokeInterface: {
 488             check_property(
 489               tag.is_interface_method(),
 490               "Invalid constant pool index %u in class file %s (not an interface method)",
 491               ref_index, CHECK);
 492             break;
 493           }
 494           default: {
 495             classfile_parse_error(
 496               "Bad method handle kind at constant pool index %u in class file %s",
 497               index, CHECK);
 498           }
 499         } // switch(refkind)
 500         // Keep the ref_index unchanged.  It will be indirected at link-time.
 501         break;
 502       } // case MethodHandle
 503       case JVM_CONSTANT_MethodType: {
 504         const int ref_index = cp->method_type_index_at(index);
 505         check_property(valid_symbol_at(ref_index),
 506           "Invalid constant pool index %u in class file %s",
 507           ref_index, CHECK);
 508         break;
 509       }
 510       case JVM_CONSTANT_InvokeDynamic: {
 511         const int name_and_type_ref_index =
 512           cp->invoke_dynamic_name_and_type_ref_index_at(index);
 513 
 514         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 515           cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 516           "Invalid constant pool index %u in class file %s",
 517           name_and_type_ref_index, CHECK);
 518         // bootstrap specifier index must be checked later,
 519         // when BootstrapMethods attr is available
 520         break;
 521       }
 522       default: {
 523         fatal("bad constant pool tag value %u", cp->tag_at(index).value());
 524         ShouldNotReachHere();
 525         break;
 526       }
 527     } // switch(tag)
 528   } // end of for
 529 
 530   if (_cp_patches != NULL) {
 531     // need to treat this_class specially...
 532     int this_class_index;
 533     {
 534       stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
 535       const u1* const mark = stream->current();
 536       stream->skip_u2_fast(1); // skip flags
 537       this_class_index = stream->get_u2_fast();
 538       stream->set_current(mark);  // revert to mark
 539     }
 540 
 541     for (index = 1; index < length; index++) {          // Index 0 is unused
 542       if (has_cp_patch_at(index)) {
 543         guarantee_property(index != this_class_index,
 544           "Illegal constant pool patch to self at %d in class file %s",
 545           index, CHECK);
 546         patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
 547       }
 548     }
 549   }
 550 
 551   if (!_need_verify) {
 552     return;
 553   }
 554 
 555   // second verification pass - checks the strings are of the right format.
 556   // but not yet to the other entries
 557   for (index = 1; index < length; index++) {
 558     const jbyte tag = cp->tag_at(index).value();
 559     switch (tag) {
 560       case JVM_CONSTANT_UnresolvedClass: {
 561         const Symbol* const class_name = cp->klass_name_at(index);
 562         // check the name, even if _cp_patches will overwrite it
 563         verify_legal_class_name(class_name, CHECK);
 564         break;
 565       }
 566       case JVM_CONSTANT_NameAndType: {
 567         if (_need_verify && _major_version >= JAVA_7_VERSION) {
 568           const int sig_index = cp->signature_ref_index_at(index);
 569           const int name_index = cp->name_ref_index_at(index);
 570           const Symbol* const name = cp->symbol_at(name_index);
 571           const Symbol* const sig = cp->symbol_at(sig_index);
 572           guarantee_property(sig->utf8_length() != 0,
 573             "Illegal zero length constant pool entry at %d in class %s",
 574             sig_index, CHECK);
 575           if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
 576             verify_legal_method_signature(name, sig, CHECK);
 577           } else {
 578             verify_legal_field_signature(name, sig, CHECK);
 579           }
 580         }
 581         break;
 582       }
 583       case JVM_CONSTANT_InvokeDynamic:
 584       case JVM_CONSTANT_Fieldref:
 585       case JVM_CONSTANT_Methodref:
 586       case JVM_CONSTANT_InterfaceMethodref: {
 587         const int name_and_type_ref_index =
 588           cp->name_and_type_ref_index_at(index);
 589         // already verified to be utf8
 590         const int name_ref_index =
 591           cp->name_ref_index_at(name_and_type_ref_index);
 592         // already verified to be utf8
 593         const int signature_ref_index =
 594           cp->signature_ref_index_at(name_and_type_ref_index);
 595         const Symbol* const name = cp->symbol_at(name_ref_index);
 596         const Symbol* const signature = cp->symbol_at(signature_ref_index);
 597         if (tag == JVM_CONSTANT_Fieldref) {
 598           verify_legal_field_name(name, CHECK);
 599           if (_need_verify && _major_version >= JAVA_7_VERSION) {
 600             // Signature is verified above, when iterating NameAndType_info.
 601             // Need only to be sure it's non-zero length and the right type.
 602             if (signature->utf8_length() == 0 ||
 603                 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
 604               throwIllegalSignature(
 605                 "Field", name, signature, CHECK);
 606             }
 607           } else {
 608             verify_legal_field_signature(name, signature, CHECK);
 609           }
 610         } else {
 611           verify_legal_method_name(name, CHECK);
 612           if (_need_verify && _major_version >= JAVA_7_VERSION) {
 613             // Signature is verified above, when iterating NameAndType_info.
 614             // Need only to be sure it's non-zero length and the right type.
 615             if (signature->utf8_length() == 0 ||
 616                 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
 617               throwIllegalSignature(
 618                 "Method", name, signature, CHECK);
 619             }
 620           } else {
 621             verify_legal_method_signature(name, signature, CHECK);
 622           }
 623           if (tag == JVM_CONSTANT_Methodref) {
 624             // 4509014: If a class method name begins with '<', it must be "<init>".
 625             assert(name != NULL, "method name in constant pool is null");
 626             const unsigned int name_len = name->utf8_length();
 627             if (name_len != 0 && name->byte_at(0) == '<') {
 628               if (name != vmSymbols::object_initializer_name()) {
 629                 classfile_parse_error(
 630                   "Bad method name at constant pool index %u in class file %s",
 631                   name_ref_index, CHECK);
 632               }
 633             }
 634           }
 635         }
 636         break;
 637       }
 638       case JVM_CONSTANT_MethodHandle: {
 639         const int ref_index = cp->method_handle_index_at(index);
 640         const int ref_kind = cp->method_handle_ref_kind_at(index);
 641         switch (ref_kind) {
 642           case JVM_REF_invokeVirtual:
 643           case JVM_REF_invokeStatic:
 644           case JVM_REF_invokeSpecial:
 645           case JVM_REF_newInvokeSpecial: {
 646             const int name_and_type_ref_index =
 647               cp->name_and_type_ref_index_at(ref_index);
 648             const int name_ref_index =
 649               cp->name_ref_index_at(name_and_type_ref_index);
 650             const Symbol* const name = cp->symbol_at(name_ref_index);
 651             if (ref_kind == JVM_REF_newInvokeSpecial) {
 652               if (name != vmSymbols::object_initializer_name()) {
 653                 classfile_parse_error(
 654                   "Bad constructor name at constant pool index %u in class file %s",
 655                     name_ref_index, CHECK);
 656               }
 657             } else {
 658               if (name == vmSymbols::object_initializer_name()) {
 659                 classfile_parse_error(
 660                   "Bad method name at constant pool index %u in class file %s",
 661                   name_ref_index, CHECK);
 662               }
 663             }
 664             break;
 665           }
 666           // Other ref_kinds are already fully checked in previous pass.
 667         } // switch(ref_kind)
 668         break;
 669       }
 670       case JVM_CONSTANT_MethodType: {
 671         const Symbol* const no_name = vmSymbols::type_name(); // place holder
 672         const Symbol* const signature = cp->method_type_signature_at(index);
 673         verify_legal_method_signature(no_name, signature, CHECK);
 674         break;
 675       }
 676       case JVM_CONSTANT_Utf8: {
 677         assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
 678       }
 679     }  // switch(tag)
 680   }  // end of for
 681 }
 682 
 683 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
 684                                           int index,
 685                                           Handle patch,
 686                                           TRAPS) {
 687   assert(cp != NULL, "invariant");
 688 
 689   BasicType patch_type = T_VOID;
 690 
 691   switch (cp->tag_at(index).value()) {
 692 
 693     case JVM_CONSTANT_UnresolvedClass: {
 694       // Patching a class means pre-resolving it.
 695       // The name in the constant pool is ignored.
 696       if (java_lang_Class::is_instance(patch())) {
 697         guarantee_property(!java_lang_Class::is_primitive(patch()),
 698                            "Illegal class patch at %d in class file %s",
 699                            index, CHECK);
 700         cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
 701       } else {
 702         guarantee_property(java_lang_String::is_instance(patch()),
 703                            "Illegal class patch at %d in class file %s",
 704                            index, CHECK);
 705         Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
 706         cp->unresolved_klass_at_put(index, name);
 707       }
 708       break;
 709     }
 710 
 711     case JVM_CONSTANT_String: {
 712       // skip this patch and don't clear it.  Needs the oop array for resolved
 713       // references to be created first.
 714       return;
 715     }
 716     case JVM_CONSTANT_Integer: patch_type = T_INT;    goto patch_prim;
 717     case JVM_CONSTANT_Float:   patch_type = T_FLOAT;  goto patch_prim;
 718     case JVM_CONSTANT_Long:    patch_type = T_LONG;   goto patch_prim;
 719     case JVM_CONSTANT_Double:  patch_type = T_DOUBLE; goto patch_prim;
 720     patch_prim:
 721     {
 722       jvalue value;
 723       BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
 724       guarantee_property(value_type == patch_type,
 725                          "Illegal primitive patch at %d in class file %s",
 726                          index, CHECK);
 727       switch (value_type) {
 728         case T_INT:    cp->int_at_put(index,   value.i); break;
 729         case T_FLOAT:  cp->float_at_put(index, value.f); break;
 730         case T_LONG:   cp->long_at_put(index,  value.j); break;
 731         case T_DOUBLE: cp->double_at_put(index, value.d); break;
 732         default:       assert(false, "");
 733       }
 734     } // end patch_prim label
 735     break;
 736 
 737     default: {
 738       // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
 739       guarantee_property(!has_cp_patch_at(index),
 740                          "Illegal unexpected patch at %d in class file %s",
 741                          index, CHECK);
 742       return;
 743     }
 744   } // end of switch(tag)
 745 
 746   // On fall-through, mark the patch as used.
 747   clear_cp_patch_at(index);
 748 }
 749 class NameSigHash: public ResourceObj {
 750  public:
 751   const Symbol*       _name;       // name
 752   const Symbol*       _sig;        // signature
 753   NameSigHash*  _next;             // Next entry in hash table
 754 };
 755 
 756 static const int HASH_ROW_SIZE = 256;
 757 
 758 static unsigned int hash(const Symbol* name, const Symbol* sig) {
 759   unsigned int raw_hash = 0;
 760   raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
 761   raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
 762 
 763   return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
 764 }
 765 
 766 
 767 static void initialize_hashtable(NameSigHash** table) {
 768   memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
 769 }
 770 // Return false if the name/sig combination is found in table.
 771 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
 772 // The old format checker uses heap sort to find duplicates.
 773 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
 774 // of table since we don't expect Symbol*'s to move.
 775 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
 776   assert(name != NULL, "name in constant pool is NULL");
 777 
 778   // First lookup for duplicates
 779   int index = hash(name, sig);
 780   NameSigHash* entry = table[index];
 781   while (entry != NULL) {
 782     if (entry->_name == name && entry->_sig == sig) {
 783       return false;
 784     }
 785     entry = entry->_next;
 786   }
 787 
 788   // No duplicate is found, allocate a new entry and fill it.
 789   entry = new NameSigHash();
 790   entry->_name = name;
 791   entry->_sig = sig;
 792 
 793   // Insert into hash table
 794   entry->_next = table[index];
 795   table[index] = entry;
 796 
 797   return true;
 798 }
 799 
 800 // Side-effects: populates the _local_interfaces field
 801 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
 802                                        const int itfs_len,
 803                                        ConstantPool* const cp,
 804                                        bool* const has_default_methods,
 805                                        TRAPS) {
 806   assert(stream != NULL, "invariant");
 807   assert(cp != NULL, "invariant");
 808   assert(has_default_methods != NULL, "invariant");
 809 
 810   if (itfs_len == 0) {
 811     _local_interfaces = Universe::the_empty_klass_array();
 812   } else {
 813     assert(itfs_len > 0, "only called for len>0");
 814     _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
 815 
 816     int index;
 817     for (index = 0; index < itfs_len; index++) {
 818       const u2 interface_index = stream->get_u2(CHECK);
 819       KlassHandle interf;
 820       check_property(
 821         valid_klass_reference_at(interface_index),
 822         "Interface name has bad constant pool index %u in class file %s",
 823         interface_index, CHECK);
 824       if (cp->tag_at(interface_index).is_klass()) {
 825         interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
 826       } else {
 827         Symbol* const unresolved_klass  = cp->klass_name_at(interface_index);
 828 
 829         // Don't need to check legal name because it's checked when parsing constant pool.
 830         // But need to make sure it's not an array type.
 831         guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
 832                            "Bad interface name in class file %s", CHECK);
 833 
 834         // Call resolve_super so classcircularity is checked
 835         const Klass* const k =
 836           SystemDictionary::resolve_super_or_fail(_class_name,
 837                                                   unresolved_klass,
 838                                                   _loader_data->class_loader(),
 839                                                   _protection_domain,
 840                                                   false,
 841                                                   CHECK);
 842         interf = KlassHandle(THREAD, k);
 843       }
 844 
 845       if (!interf()->is_interface()) {
 846         THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
 847                    "Implementing class");
 848       }
 849 
 850       if (InstanceKlass::cast(interf())->has_default_methods()) {
 851         *has_default_methods = true;
 852       }
 853       _local_interfaces->at_put(index, interf());
 854     }
 855 
 856     if (!_need_verify || itfs_len <= 1) {
 857       return;
 858     }
 859 
 860     // Check if there's any duplicates in interfaces
 861     ResourceMark rm(THREAD);
 862     NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
 863                                                                  NameSigHash*,
 864                                                                  HASH_ROW_SIZE);
 865     initialize_hashtable(interface_names);
 866     bool dup = false;
 867     {
 868       debug_only(NoSafepointVerifier nsv;)
 869       for (index = 0; index < itfs_len; index++) {
 870         const Klass* const k = _local_interfaces->at(index);
 871         const Symbol* const name = InstanceKlass::cast(k)->name();
 872         // If no duplicates, add (name, NULL) in hashtable interface_names.
 873         if (!put_after_lookup(name, NULL, interface_names)) {
 874           dup = true;
 875           break;
 876         }
 877       }
 878     }
 879     if (dup) {
 880       classfile_parse_error("Duplicate interface name in class file %s", CHECK);
 881     }
 882   }
 883 }
 884 
 885 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
 886                                            int constantvalue_index,
 887                                            int signature_index,
 888                                            TRAPS) const {
 889   // Make sure the constant pool entry is of a type appropriate to this field
 890   guarantee_property(
 891     (constantvalue_index > 0 &&
 892       constantvalue_index < cp->length()),
 893     "Bad initial value index %u in ConstantValue attribute in class file %s",
 894     constantvalue_index, CHECK);
 895 
 896   const constantTag value_type = cp->tag_at(constantvalue_index);
 897   switch(cp->basic_type_for_signature_at(signature_index)) {
 898     case T_LONG: {
 899       guarantee_property(value_type.is_long(),
 900                          "Inconsistent constant value type in class file %s",
 901                          CHECK);
 902       break;
 903     }
 904     case T_FLOAT: {
 905       guarantee_property(value_type.is_float(),
 906                          "Inconsistent constant value type in class file %s",
 907                          CHECK);
 908       break;
 909     }
 910     case T_DOUBLE: {
 911       guarantee_property(value_type.is_double(),
 912                          "Inconsistent constant value type in class file %s",
 913                          CHECK);
 914       break;
 915     }
 916     case T_BYTE:
 917     case T_CHAR:
 918     case T_SHORT:
 919     case T_BOOLEAN:
 920     case T_INT: {
 921       guarantee_property(value_type.is_int(),
 922                          "Inconsistent constant value type in class file %s",
 923                          CHECK);
 924       break;
 925     }
 926     case T_OBJECT: {
 927       guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
 928                          && value_type.is_string()),
 929                          "Bad string initial value in class file %s",
 930                          CHECK);
 931       break;
 932     }
 933     default: {
 934       classfile_parse_error("Unable to set initial value %u in class file %s",
 935                              constantvalue_index,
 936                              CHECK);
 937     }
 938   }
 939 }
 940 
 941 class AnnotationCollector : public ResourceObj{
 942 public:
 943   enum Location { _in_field, _in_method, _in_class };
 944   enum ID {
 945     _unknown = 0,
 946     _method_CallerSensitive,
 947     _method_ForceInline,
 948     _method_DontInline,
 949     _method_InjectedProfile,
 950     _method_LambdaForm_Compiled,
 951     _method_LambdaForm_Hidden,
 952     _method_HotSpotIntrinsicCandidate,
 953     _jdk_internal_vm_annotation_Contended,
 954     _field_Stable,
 955     _jdk_internal_vm_annotation_ReservedStackAccess,
 956     _annotation_LIMIT
 957   };
 958   const Location _location;
 959   int _annotations_present;
 960   u2 _contended_group;
 961 
 962   AnnotationCollector(Location location)
 963     : _location(location), _annotations_present(0)
 964   {
 965     assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
 966   }
 967   // If this annotation name has an ID, report it (or _none).
 968   ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
 969   // Set the annotation name:
 970   void set_annotation(ID id) {
 971     assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
 972     _annotations_present |= nth_bit((int)id);
 973   }
 974 
 975   void remove_annotation(ID id) {
 976     assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
 977     _annotations_present &= ~nth_bit((int)id);
 978   }
 979 
 980   // Report if the annotation is present.
 981   bool has_any_annotations() const { return _annotations_present != 0; }
 982   bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
 983 
 984   void set_contended_group(u2 group) { _contended_group = group; }
 985   u2 contended_group() const { return _contended_group; }
 986 
 987   bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
 988 
 989   void set_stable(bool stable) { set_annotation(_field_Stable); }
 990   bool is_stable() const { return has_annotation(_field_Stable); }
 991 };
 992 
 993 // This class also doubles as a holder for metadata cleanup.
 994 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
 995 private:
 996   ClassLoaderData* _loader_data;
 997   AnnotationArray* _field_annotations;
 998   AnnotationArray* _field_type_annotations;
 999 public:
1000   FieldAnnotationCollector(ClassLoaderData* loader_data) :
1001     AnnotationCollector(_in_field),
1002     _loader_data(loader_data),
1003     _field_annotations(NULL),
1004     _field_type_annotations(NULL) {}
1005   ~FieldAnnotationCollector();
1006   void apply_to(FieldInfo* f);
1007   AnnotationArray* field_annotations()      { return _field_annotations; }
1008   AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1009 
1010   void set_field_annotations(AnnotationArray* a)      { _field_annotations = a; }
1011   void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1012 };
1013 
1014 class MethodAnnotationCollector : public AnnotationCollector{
1015 public:
1016   MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1017   void apply_to(methodHandle m);
1018 };
1019 
1020 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1021 public:
1022   ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1023   void apply_to(InstanceKlass* ik);
1024 };
1025 
1026 
1027 static int skip_annotation_value(const u1*, int, int); // fwd decl
1028 
1029 // Skip an annotation.  Return >=limit if there is any problem.
1030 static int skip_annotation(const u1* buffer, int limit, int index) {
1031   assert(buffer != NULL, "invariant");
1032   // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1033   // value := switch (tag:u1) { ... }
1034   index += 2;  // skip atype
1035   if ((index += 2) >= limit)  return limit;  // read nmem
1036   int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1037   while (--nmem >= 0 && index < limit) {
1038     index += 2; // skip member
1039     index = skip_annotation_value(buffer, limit, index);
1040   }
1041   return index;
1042 }
1043 
1044 // Skip an annotation value.  Return >=limit if there is any problem.
1045 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1046   assert(buffer != NULL, "invariant");
1047 
1048   // value := switch (tag:u1) {
1049   //   case B, C, I, S, Z, D, F, J, c: con:u2;
1050   //   case e: e_class:u2 e_name:u2;
1051   //   case s: s_con:u2;
1052   //   case [: do(nval:u2) {value};
1053   //   case @: annotation;
1054   //   case s: s_con:u2;
1055   // }
1056   if ((index += 1) >= limit)  return limit;  // read tag
1057   const u1 tag = buffer[index - 1];
1058   switch (tag) {
1059     case 'B':
1060     case 'C':
1061     case 'I':
1062     case 'S':
1063     case 'Z':
1064     case 'D':
1065     case 'F':
1066     case 'J':
1067     case 'c':
1068     case 's':
1069       index += 2;  // skip con or s_con
1070       break;
1071     case 'e':
1072       index += 4;  // skip e_class, e_name
1073       break;
1074     case '[':
1075     {
1076       if ((index += 2) >= limit)  return limit;  // read nval
1077       int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1078       while (--nval >= 0 && index < limit) {
1079         index = skip_annotation_value(buffer, limit, index);
1080       }
1081     }
1082     break;
1083     case '@':
1084       index = skip_annotation(buffer, limit, index);
1085       break;
1086     default:
1087       return limit;  //  bad tag byte
1088   }
1089   return index;
1090 }
1091 
1092 // Sift through annotations, looking for those significant to the VM:
1093 static void parse_annotations(const ConstantPool* const cp,
1094                               const u1* buffer, int limit,
1095                               AnnotationCollector* coll,
1096                               ClassLoaderData* loader_data,
1097                               TRAPS) {
1098 
1099   assert(cp != NULL, "invariant");
1100   assert(buffer != NULL, "invariant");
1101   assert(coll != NULL, "invariant");
1102   assert(loader_data != NULL, "invariant");
1103 
1104   // annotations := do(nann:u2) {annotation}
1105   int index = 0;
1106   if ((index += 2) >= limit)  return;  // read nann
1107   int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1108   enum {  // initial annotation layout
1109     atype_off = 0,      // utf8 such as 'Ljava/lang/annotation/Retention;'
1110     count_off = 2,      // u2   such as 1 (one value)
1111     member_off = 4,     // utf8 such as 'value'
1112     tag_off = 6,        // u1   such as 'c' (type) or 'e' (enum)
1113     e_tag_val = 'e',
1114     e_type_off = 7,   // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1115     e_con_off = 9,    // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1116     e_size = 11,     // end of 'e' annotation
1117     c_tag_val = 'c',    // payload is type
1118     c_con_off = 7,    // utf8 payload, such as 'I'
1119     c_size = 9,       // end of 'c' annotation
1120     s_tag_val = 's',    // payload is String
1121     s_con_off = 7,    // utf8 payload, such as 'Ljava/lang/String;'
1122     s_size = 9,
1123     min_size = 6        // smallest possible size (zero members)
1124   };
1125   while ((--nann) >= 0 && (index - 2 + min_size <= limit)) {
1126     int index0 = index;
1127     index = skip_annotation(buffer, limit, index);
1128     const u1* const abase = buffer + index0;
1129     const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1130     const int count = Bytes::get_Java_u2((address)abase + count_off);
1131     const Symbol* const aname = check_symbol_at(cp, atype);
1132     if (aname == NULL)  break;  // invalid annotation name
1133     const Symbol* member = NULL;
1134     if (count >= 1) {
1135       const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1136       member = check_symbol_at(cp, member_index);
1137       if (member == NULL)  break;  // invalid member name
1138     }
1139 
1140     // Here is where parsing particular annotations will take place.
1141     AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1142     if (AnnotationCollector::_unknown == id)  continue;
1143     coll->set_annotation(id);
1144 
1145     if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1146       // @Contended can optionally specify the contention group.
1147       //
1148       // Contended group defines the equivalence class over the fields:
1149       // the fields within the same contended group are not treated distinct.
1150       // The only exception is default group, which does not incur the
1151       // equivalence. Naturally, contention group for classes is meaningless.
1152       //
1153       // While the contention group is specified as String, annotation
1154       // values are already interned, and we might as well use the constant
1155       // pool index as the group tag.
1156       //
1157       u2 group_index = 0; // default contended group
1158       if (count == 1
1159         && s_size == (index - index0)  // match size
1160         && s_tag_val == *(abase + tag_off)
1161         && member == vmSymbols::value_name()) {
1162         group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1163         if (cp->symbol_at(group_index)->utf8_length() == 0) {
1164           group_index = 0; // default contended group
1165         }
1166       }
1167       coll->set_contended_group(group_index);
1168     }
1169   }
1170 }
1171 
1172 
1173 // Parse attributes for a field.
1174 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1175                                              u2 attributes_count,
1176                                              bool is_static, u2 signature_index,
1177                                              u2* const constantvalue_index_addr,
1178                                              bool* const is_synthetic_addr,
1179                                              u2* const generic_signature_index_addr,
1180                                              ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1181                                              TRAPS) {
1182   assert(cfs != NULL, "invariant");
1183   assert(constantvalue_index_addr != NULL, "invariant");
1184   assert(is_synthetic_addr != NULL, "invariant");
1185   assert(generic_signature_index_addr != NULL, "invariant");
1186   assert(parsed_annotations != NULL, "invariant");
1187   assert(attributes_count > 0, "attributes_count should be greater than 0");
1188 
1189   u2 constantvalue_index = 0;
1190   u2 generic_signature_index = 0;
1191   bool is_synthetic = false;
1192   const u1* runtime_visible_annotations = NULL;
1193   int runtime_visible_annotations_length = 0;
1194   const u1* runtime_invisible_annotations = NULL;
1195   int runtime_invisible_annotations_length = 0;
1196   const u1* runtime_visible_type_annotations = NULL;
1197   int runtime_visible_type_annotations_length = 0;
1198   const u1* runtime_invisible_type_annotations = NULL;
1199   int runtime_invisible_type_annotations_length = 0;
1200   bool runtime_invisible_annotations_exists = false;
1201   bool runtime_invisible_type_annotations_exists = false;
1202   const ConstantPool* const cp = _cp;
1203 
1204   while (attributes_count--) {
1205     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
1206     const u2 attribute_name_index = cfs->get_u2_fast();
1207     const u4 attribute_length = cfs->get_u4_fast();
1208     check_property(valid_symbol_at(attribute_name_index),
1209                    "Invalid field attribute index %u in class file %s",
1210                    attribute_name_index,
1211                    CHECK);
1212 
1213     const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1214     if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1215       // ignore if non-static
1216       if (constantvalue_index != 0) {
1217         classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1218       }
1219       check_property(
1220         attribute_length == 2,
1221         "Invalid ConstantValue field attribute length %u in class file %s",
1222         attribute_length, CHECK);
1223 
1224       constantvalue_index = cfs->get_u2(CHECK);
1225       if (_need_verify) {
1226         verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1227       }
1228     } else if (attribute_name == vmSymbols::tag_synthetic()) {
1229       if (attribute_length != 0) {
1230         classfile_parse_error(
1231           "Invalid Synthetic field attribute length %u in class file %s",
1232           attribute_length, CHECK);
1233       }
1234       is_synthetic = true;
1235     } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1236       if (attribute_length != 0) {
1237         classfile_parse_error(
1238           "Invalid Deprecated field attribute length %u in class file %s",
1239           attribute_length, CHECK);
1240       }
1241     } else if (_major_version >= JAVA_1_5_VERSION) {
1242       if (attribute_name == vmSymbols::tag_signature()) {
1243         if (attribute_length != 2) {
1244           classfile_parse_error(
1245             "Wrong size %u for field's Signature attribute in class file %s",
1246             attribute_length, CHECK);
1247         }
1248         generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1249       } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1250         if (runtime_visible_annotations != NULL) {
1251           classfile_parse_error(
1252             "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1253         }
1254         runtime_visible_annotations_length = attribute_length;
1255         runtime_visible_annotations = cfs->get_u1_buffer();
1256         assert(runtime_visible_annotations != NULL, "null visible annotations");
1257         parse_annotations(cp,
1258                           runtime_visible_annotations,
1259                           runtime_visible_annotations_length,
1260                           parsed_annotations,
1261                           _loader_data,
1262                           CHECK);
1263         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
1264       } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1265         if (runtime_invisible_annotations_exists) {
1266           classfile_parse_error(
1267             "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1268         }
1269         runtime_invisible_annotations_exists = true;
1270         if (PreserveAllAnnotations) {
1271           runtime_invisible_annotations_length = attribute_length;
1272           runtime_invisible_annotations = cfs->get_u1_buffer();
1273           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1274         }
1275         cfs->skip_u1(attribute_length, CHECK);
1276       } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1277         if (runtime_visible_type_annotations != NULL) {
1278           classfile_parse_error(
1279             "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1280         }
1281         runtime_visible_type_annotations_length = attribute_length;
1282         runtime_visible_type_annotations = cfs->get_u1_buffer();
1283         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1284         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1285       } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1286         if (runtime_invisible_type_annotations_exists) {
1287           classfile_parse_error(
1288             "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1289         } else {
1290           runtime_invisible_type_annotations_exists = true;
1291         }
1292         if (PreserveAllAnnotations) {
1293           runtime_invisible_type_annotations_length = attribute_length;
1294           runtime_invisible_type_annotations = cfs->get_u1_buffer();
1295           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1296         }
1297         cfs->skip_u1(attribute_length, CHECK);
1298       } else {
1299         cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1300       }
1301     } else {
1302       cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1303     }
1304   }
1305 
1306   *constantvalue_index_addr = constantvalue_index;
1307   *is_synthetic_addr = is_synthetic;
1308   *generic_signature_index_addr = generic_signature_index;
1309   AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1310                                             runtime_visible_annotations_length,
1311                                             runtime_invisible_annotations,
1312                                             runtime_invisible_annotations_length,
1313                                             CHECK);
1314   parsed_annotations->set_field_annotations(a);
1315   a = assemble_annotations(runtime_visible_type_annotations,
1316                            runtime_visible_type_annotations_length,
1317                            runtime_invisible_type_annotations,
1318                            runtime_invisible_type_annotations_length,
1319                            CHECK);
1320   parsed_annotations->set_field_type_annotations(a);
1321   return;
1322 }
1323 
1324 
1325 // Field allocation types. Used for computing field offsets.
1326 
1327 enum FieldAllocationType {
1328   STATIC_OOP,           // Oops
1329   STATIC_BYTE,          // Boolean, Byte, char
1330   STATIC_SHORT,         // shorts
1331   STATIC_WORD,          // ints
1332   STATIC_DOUBLE,        // aligned long or double
1333   NONSTATIC_OOP,
1334   NONSTATIC_BYTE,
1335   NONSTATIC_SHORT,
1336   NONSTATIC_WORD,
1337   NONSTATIC_DOUBLE,
1338   MAX_FIELD_ALLOCATION_TYPE,
1339   BAD_ALLOCATION_TYPE = -1
1340 };
1341 
1342 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1343   BAD_ALLOCATION_TYPE, // 0
1344   BAD_ALLOCATION_TYPE, // 1
1345   BAD_ALLOCATION_TYPE, // 2
1346   BAD_ALLOCATION_TYPE, // 3
1347   NONSTATIC_BYTE ,     // T_BOOLEAN     =  4,
1348   NONSTATIC_SHORT,     // T_CHAR        =  5,
1349   NONSTATIC_WORD,      // T_FLOAT       =  6,
1350   NONSTATIC_DOUBLE,    // T_DOUBLE      =  7,
1351   NONSTATIC_BYTE,      // T_BYTE        =  8,
1352   NONSTATIC_SHORT,     // T_SHORT       =  9,
1353   NONSTATIC_WORD,      // T_INT         = 10,
1354   NONSTATIC_DOUBLE,    // T_LONG        = 11,
1355   NONSTATIC_OOP,       // T_OBJECT      = 12,
1356   NONSTATIC_OOP,       // T_ARRAY       = 13,
1357   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1358   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1359   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1360   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1361   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1362   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1363   BAD_ALLOCATION_TYPE, // 0
1364   BAD_ALLOCATION_TYPE, // 1
1365   BAD_ALLOCATION_TYPE, // 2
1366   BAD_ALLOCATION_TYPE, // 3
1367   STATIC_BYTE ,        // T_BOOLEAN     =  4,
1368   STATIC_SHORT,        // T_CHAR        =  5,
1369   STATIC_WORD,         // T_FLOAT       =  6,
1370   STATIC_DOUBLE,       // T_DOUBLE      =  7,
1371   STATIC_BYTE,         // T_BYTE        =  8,
1372   STATIC_SHORT,        // T_SHORT       =  9,
1373   STATIC_WORD,         // T_INT         = 10,
1374   STATIC_DOUBLE,       // T_LONG        = 11,
1375   STATIC_OOP,          // T_OBJECT      = 12,
1376   STATIC_OOP,          // T_ARRAY       = 13,
1377   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1378   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1379   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1380   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1381   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1382   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1383 };
1384 
1385 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1386   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1387   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1388   assert(result != BAD_ALLOCATION_TYPE, "bad type");
1389   return result;
1390 }
1391 
1392 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1393  public:
1394   u2 count[MAX_FIELD_ALLOCATION_TYPE];
1395 
1396   FieldAllocationCount() {
1397     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1398       count[i] = 0;
1399     }
1400   }
1401 
1402   FieldAllocationType update(bool is_static, BasicType type) {
1403     FieldAllocationType atype = basic_type_to_atype(is_static, type);
1404     // Make sure there is no overflow with injected fields.
1405     assert(count[atype] < 0xFFFF, "More than 65535 fields");
1406     count[atype]++;
1407     return atype;
1408   }
1409 };
1410 
1411 // Side-effects: populates the _fields, _fields_annotations,
1412 // _fields_type_annotations fields
1413 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1414                                    bool is_interface,
1415                                    FieldAllocationCount* const fac,
1416                                    ConstantPool* cp,
1417                                    const int cp_size,
1418                                    u2* const java_fields_count_ptr,
1419                                    TRAPS) {
1420 
1421   assert(cfs != NULL, "invariant");
1422   assert(fac != NULL, "invariant");
1423   assert(cp != NULL, "invariant");
1424   assert(java_fields_count_ptr != NULL, "invariant");
1425 
1426   assert(NULL == _fields, "invariant");
1427   assert(NULL == _fields_annotations, "invariant");
1428   assert(NULL == _fields_type_annotations, "invariant");
1429 
1430   cfs->guarantee_more(2, CHECK);  // length
1431   const u2 length = cfs->get_u2_fast();
1432   *java_fields_count_ptr = length;
1433 
1434   int num_injected = 0;
1435   const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1436                                                                   &num_injected);
1437   const int total_fields = length + num_injected;
1438 
1439   // The field array starts with tuples of shorts
1440   // [access, name index, sig index, initial value index, byte offset].
1441   // A generic signature slot only exists for field with generic
1442   // signature attribute. And the access flag is set with
1443   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1444   // signature slots are at the end of the field array and after all
1445   // other fields data.
1446   //
1447   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1448   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1449   //       ...
1450   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1451   //       [generic signature index]
1452   //       [generic signature index]
1453   //       ...
1454   //
1455   // Allocate a temporary resource array for field data. For each field,
1456   // a slot is reserved in the temporary array for the generic signature
1457   // index. After parsing all fields, the data are copied to a permanent
1458   // array and any unused slots will be discarded.
1459   ResourceMark rm(THREAD);
1460   u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1461                                               u2,
1462                                               total_fields * (FieldInfo::field_slots + 1));
1463 
1464   // The generic signature slots start after all other fields' data.
1465   int generic_signature_slot = total_fields * FieldInfo::field_slots;
1466   int num_generic_signature = 0;
1467   for (int n = 0; n < length; n++) {
1468     // access_flags, name_index, descriptor_index, attributes_count
1469     cfs->guarantee_more(8, CHECK);
1470 
1471     AccessFlags access_flags;
1472     const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1473     verify_legal_field_modifiers(flags, is_interface, CHECK);
1474     access_flags.set_flags(flags);
1475 
1476     const u2 name_index = cfs->get_u2_fast();
1477     check_property(valid_symbol_at(name_index),
1478       "Invalid constant pool index %u for field name in class file %s",
1479       name_index, CHECK);
1480     const Symbol* const name = cp->symbol_at(name_index);
1481     verify_legal_field_name(name, CHECK);
1482 
1483     const u2 signature_index = cfs->get_u2_fast();
1484     check_property(valid_symbol_at(signature_index),
1485       "Invalid constant pool index %u for field signature in class file %s",
1486       signature_index, CHECK);
1487     const Symbol* const sig = cp->symbol_at(signature_index);
1488     verify_legal_field_signature(name, sig, CHECK);
1489 
1490     u2 constantvalue_index = 0;
1491     bool is_synthetic = false;
1492     u2 generic_signature_index = 0;
1493     const bool is_static = access_flags.is_static();
1494     FieldAnnotationCollector parsed_annotations(_loader_data);
1495 
1496     const u2 attributes_count = cfs->get_u2_fast();
1497     if (attributes_count > 0) {
1498       parse_field_attributes(cfs,
1499                              attributes_count,
1500                              is_static,
1501                              signature_index,
1502                              &constantvalue_index,
1503                              &is_synthetic,
1504                              &generic_signature_index,
1505                              &parsed_annotations,
1506                              CHECK);
1507 
1508       if (parsed_annotations.field_annotations() != NULL) {
1509         if (_fields_annotations == NULL) {
1510           _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1511                                              _loader_data, length, NULL,
1512                                              CHECK);
1513         }
1514         _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1515         parsed_annotations.set_field_annotations(NULL);
1516       }
1517       if (parsed_annotations.field_type_annotations() != NULL) {
1518         if (_fields_type_annotations == NULL) {
1519           _fields_type_annotations =
1520             MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1521                                                          length,
1522                                                          NULL,
1523                                                          CHECK);
1524         }
1525         _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1526         parsed_annotations.set_field_type_annotations(NULL);
1527       }
1528 
1529       if (is_synthetic) {
1530         access_flags.set_is_synthetic();
1531       }
1532       if (generic_signature_index != 0) {
1533         access_flags.set_field_has_generic_signature();
1534         fa[generic_signature_slot] = generic_signature_index;
1535         generic_signature_slot ++;
1536         num_generic_signature ++;
1537       }
1538     }
1539 
1540     FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1541     field->initialize(access_flags.as_short(),
1542                       name_index,
1543                       signature_index,
1544                       constantvalue_index);
1545     const BasicType type = cp->basic_type_for_signature_at(signature_index);
1546 
1547     // Remember how many oops we encountered and compute allocation type
1548     const FieldAllocationType atype = fac->update(is_static, type);
1549     field->set_allocation_type(atype);
1550 
1551     // After field is initialized with type, we can augment it with aux info
1552     if (parsed_annotations.has_any_annotations())
1553       parsed_annotations.apply_to(field);
1554   }
1555 
1556   int index = length;
1557   if (num_injected != 0) {
1558     for (int n = 0; n < num_injected; n++) {
1559       // Check for duplicates
1560       if (injected[n].may_be_java) {
1561         const Symbol* const name      = injected[n].name();
1562         const Symbol* const signature = injected[n].signature();
1563         bool duplicate = false;
1564         for (int i = 0; i < length; i++) {
1565           const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1566           if (name      == cp->symbol_at(f->name_index()) &&
1567               signature == cp->symbol_at(f->signature_index())) {
1568             // Symbol is desclared in Java so skip this one
1569             duplicate = true;
1570             break;
1571           }
1572         }
1573         if (duplicate) {
1574           // These will be removed from the field array at the end
1575           continue;
1576         }
1577       }
1578 
1579       // Injected field
1580       FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1581       field->initialize(JVM_ACC_FIELD_INTERNAL,
1582                         injected[n].name_index,
1583                         injected[n].signature_index,
1584                         0);
1585 
1586       const BasicType type = FieldType::basic_type(injected[n].signature());
1587 
1588       // Remember how many oops we encountered and compute allocation type
1589       const FieldAllocationType atype = fac->update(false, type);
1590       field->set_allocation_type(atype);
1591       index++;
1592     }
1593   }
1594 
1595   assert(NULL == _fields, "invariant");
1596 
1597   _fields =
1598     MetadataFactory::new_array<u2>(_loader_data,
1599                                    index * FieldInfo::field_slots + num_generic_signature,
1600                                    CHECK);
1601   // Sometimes injected fields already exist in the Java source so
1602   // the fields array could be too long.  In that case the
1603   // fields array is trimed. Also unused slots that were reserved
1604   // for generic signature indexes are discarded.
1605   {
1606     int i = 0;
1607     for (; i < index * FieldInfo::field_slots; i++) {
1608       _fields->at_put(i, fa[i]);
1609     }
1610     for (int j = total_fields * FieldInfo::field_slots;
1611          j < generic_signature_slot; j++) {
1612       _fields->at_put(i++, fa[j]);
1613     }
1614     assert(_fields->length() == i, "");
1615   }
1616 
1617   if (_need_verify && length > 1) {
1618     // Check duplicated fields
1619     ResourceMark rm(THREAD);
1620     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1621       THREAD, NameSigHash*, HASH_ROW_SIZE);
1622     initialize_hashtable(names_and_sigs);
1623     bool dup = false;
1624     {
1625       debug_only(NoSafepointVerifier nsv;)
1626       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1627         const Symbol* const name = fs.name();
1628         const Symbol* const sig = fs.signature();
1629         // If no duplicates, add name/signature in hashtable names_and_sigs.
1630         if (!put_after_lookup(name, sig, names_and_sigs)) {
1631           dup = true;
1632           break;
1633         }
1634       }
1635     }
1636     if (dup) {
1637       classfile_parse_error("Duplicate field name&signature in class file %s",
1638                             CHECK);
1639     }
1640   }
1641 }
1642 
1643 
1644 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1645   while (length-- > 0) {
1646     *dest++ = Bytes::get_Java_u2((u1*) (src++));
1647   }
1648 }
1649 
1650 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1651                                                  u4 code_length,
1652                                                  u4 exception_table_length,
1653                                                  TRAPS) {
1654   assert(cfs != NULL, "invariant");
1655 
1656   const u2* const exception_table_start = cfs->get_u2_buffer();
1657   assert(exception_table_start != NULL, "null exception table");
1658 
1659   cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1660                                                                // end_pc,
1661                                                                // handler_pc,
1662                                                                // catch_type_index
1663 
1664   // Will check legal target after parsing code array in verifier.
1665   if (_need_verify) {
1666     for (unsigned int i = 0; i < exception_table_length; i++) {
1667       const u2 start_pc = cfs->get_u2_fast();
1668       const u2 end_pc = cfs->get_u2_fast();
1669       const u2 handler_pc = cfs->get_u2_fast();
1670       const u2 catch_type_index = cfs->get_u2_fast();
1671       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1672                          "Illegal exception table range in class file %s",
1673                          CHECK_NULL);
1674       guarantee_property(handler_pc < code_length,
1675                          "Illegal exception table handler in class file %s",
1676                          CHECK_NULL);
1677       if (catch_type_index != 0) {
1678         guarantee_property(valid_klass_reference_at(catch_type_index),
1679                            "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1680       }
1681     }
1682   } else {
1683     cfs->skip_u2_fast(exception_table_length * 4);
1684   }
1685   return exception_table_start;
1686 }
1687 
1688 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1689                                              u4 code_length,
1690                                              CompressedLineNumberWriteStream**const write_stream,
1691                                              TRAPS) {
1692 
1693   const ClassFileStream* const cfs = _stream;
1694   unsigned int num_entries = cfs->get_u2(CHECK);
1695 
1696   // Each entry is a u2 start_pc, and a u2 line_number
1697   const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1698 
1699   // Verify line number attribute and table length
1700   check_property(
1701     code_attribute_length == sizeof(u2) + length_in_bytes,
1702     "LineNumberTable attribute has wrong length in class file %s", CHECK);
1703 
1704   cfs->guarantee_more(length_in_bytes, CHECK);
1705 
1706   if ((*write_stream) == NULL) {
1707     if (length_in_bytes > fixed_buffer_size) {
1708       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1709     } else {
1710       (*write_stream) = new CompressedLineNumberWriteStream(
1711         _linenumbertable_buffer, fixed_buffer_size);
1712     }
1713   }
1714 
1715   while (num_entries-- > 0) {
1716     const u2 bci  = cfs->get_u2_fast(); // start_pc
1717     const u2 line = cfs->get_u2_fast(); // line_number
1718     guarantee_property(bci < code_length,
1719         "Invalid pc in LineNumberTable in class file %s", CHECK);
1720     (*write_stream)->write_pair(bci, line);
1721   }
1722 }
1723 
1724 
1725 class LVT_Hash : public AllStatic {
1726  public:
1727 
1728   static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1729   /*
1730    * 3-tuple start_bci/length/slot has to be unique key,
1731    * so the following comparison seems to be redundant:
1732    *       && elem->name_cp_index == entry->_elem->name_cp_index
1733    */
1734     return (e0.start_bci     == e1.start_bci &&
1735             e0.length        == e1.length &&
1736             e0.name_cp_index == e1.name_cp_index &&
1737             e0.slot          == e1.slot);
1738   }
1739 
1740   static unsigned int hash(LocalVariableTableElement const& e0) {
1741     unsigned int raw_hash = e0.start_bci;
1742 
1743     raw_hash = e0.length        + raw_hash * 37;
1744     raw_hash = e0.name_cp_index + raw_hash * 37;
1745     raw_hash = e0.slot          + raw_hash * 37;
1746 
1747     return raw_hash;
1748   }
1749 };
1750 
1751 
1752 // Class file LocalVariableTable elements.
1753 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1754  public:
1755   u2 start_bci;
1756   u2 length;
1757   u2 name_cp_index;
1758   u2 descriptor_cp_index;
1759   u2 slot;
1760 };
1761 
1762 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1763                              LocalVariableTableElement* const lvt) {
1764   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
1765   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
1766   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1767   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1768   lvt->signature_cp_index  = 0;
1769   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
1770 }
1771 
1772 // Function is used to parse both attributes:
1773 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1774 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1775                                                      u4 code_length,
1776                                                      u2 max_locals,
1777                                                      u4 code_attribute_length,
1778                                                      u2* const localvariable_table_length,
1779                                                      bool isLVTT,
1780                                                      TRAPS) {
1781   const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1782   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1783   const unsigned int size =
1784     (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1785 
1786   const ConstantPool* const cp = _cp;
1787 
1788   // Verify local variable table attribute has right length
1789   if (_need_verify) {
1790     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1791                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1792   }
1793 
1794   const u2* const localvariable_table_start = cfs->get_u2_buffer();
1795   assert(localvariable_table_start != NULL, "null local variable table");
1796   if (!_need_verify) {
1797     cfs->skip_u2_fast(size);
1798   } else {
1799     cfs->guarantee_more(size * 2, CHECK_NULL);
1800     for(int i = 0; i < (*localvariable_table_length); i++) {
1801       const u2 start_pc = cfs->get_u2_fast();
1802       const u2 length = cfs->get_u2_fast();
1803       const u2 name_index = cfs->get_u2_fast();
1804       const u2 descriptor_index = cfs->get_u2_fast();
1805       const u2 index = cfs->get_u2_fast();
1806       // Assign to a u4 to avoid overflow
1807       const u4 end_pc = (u4)start_pc + (u4)length;
1808 
1809       if (start_pc >= code_length) {
1810         classfile_parse_error(
1811           "Invalid start_pc %u in %s in class file %s",
1812           start_pc, tbl_name, CHECK_NULL);
1813       }
1814       if (end_pc > code_length) {
1815         classfile_parse_error(
1816           "Invalid length %u in %s in class file %s",
1817           length, tbl_name, CHECK_NULL);
1818       }
1819       const int cp_size = cp->length();
1820       guarantee_property(valid_symbol_at(name_index),
1821         "Name index %u in %s has bad constant type in class file %s",
1822         name_index, tbl_name, CHECK_NULL);
1823       guarantee_property(valid_symbol_at(descriptor_index),
1824         "Signature index %u in %s has bad constant type in class file %s",
1825         descriptor_index, tbl_name, CHECK_NULL);
1826 
1827       const Symbol* const name = cp->symbol_at(name_index);
1828       const Symbol* const sig = cp->symbol_at(descriptor_index);
1829       verify_legal_field_name(name, CHECK_NULL);
1830       u2 extra_slot = 0;
1831       if (!isLVTT) {
1832         verify_legal_field_signature(name, sig, CHECK_NULL);
1833 
1834         // 4894874: check special cases for double and long local variables
1835         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1836             sig == vmSymbols::type_signature(T_LONG)) {
1837           extra_slot = 1;
1838         }
1839       }
1840       guarantee_property((index + extra_slot) < max_locals,
1841                           "Invalid index %u in %s in class file %s",
1842                           index, tbl_name, CHECK_NULL);
1843     }
1844   }
1845   return localvariable_table_start;
1846 }
1847 
1848 
1849 void ClassFileParser::parse_type_array(u2 array_length,
1850                                        u4 code_length,
1851                                        u4* const u1_index,
1852                                        u4* const u2_index,
1853                                        u1* const u1_array,
1854                                        u2* const u2_array,
1855                                        TRAPS) {
1856   const ClassFileStream* const cfs = _stream;
1857   u2 index = 0; // index in the array with long/double occupying two slots
1858   u4 i1 = *u1_index;
1859   u4 i2 = *u2_index + 1;
1860   for(int i = 0; i < array_length; i++) {
1861     const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1862     index++;
1863     if (tag == ITEM_Long || tag == ITEM_Double) {
1864       index++;
1865     } else if (tag == ITEM_Object) {
1866       const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1867       guarantee_property(valid_klass_reference_at(class_index),
1868                          "Bad class index %u in StackMap in class file %s",
1869                          class_index, CHECK);
1870     } else if (tag == ITEM_Uninitialized) {
1871       const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1872       guarantee_property(
1873         offset < code_length,
1874         "Bad uninitialized type offset %u in StackMap in class file %s",
1875         offset, CHECK);
1876     } else {
1877       guarantee_property(
1878         tag <= (u1)ITEM_Uninitialized,
1879         "Unknown variable type %u in StackMap in class file %s",
1880         tag, CHECK);
1881     }
1882   }
1883   u2_array[*u2_index] = index;
1884   *u1_index = i1;
1885   *u2_index = i2;
1886 }
1887 
1888 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1889                                       u4 code_attribute_length,
1890                                       bool need_verify,
1891                                       TRAPS) {
1892   assert(cfs != NULL, "invariant");
1893 
1894   if (0 == code_attribute_length) {
1895     return NULL;
1896   }
1897 
1898   const u1* const stackmap_table_start = cfs->get_u1_buffer();
1899   assert(stackmap_table_start != NULL, "null stackmap table");
1900 
1901   // check code_attribute_length first
1902   cfs->skip_u1(code_attribute_length, CHECK_NULL);
1903 
1904   if (!need_verify && !DumpSharedSpaces) {
1905     return NULL;
1906   }
1907   return stackmap_table_start;
1908 }
1909 
1910 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1911                                                     u2* const checked_exceptions_length,
1912                                                     u4 method_attribute_length,
1913                                                     TRAPS) {
1914   assert(cfs != NULL, "invariant");
1915   assert(checked_exceptions_length != NULL, "invariant");
1916 
1917   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
1918   *checked_exceptions_length = cfs->get_u2_fast();
1919   const unsigned int size =
1920     (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1921   const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1922   assert(checked_exceptions_start != NULL, "null checked exceptions");
1923   if (!_need_verify) {
1924     cfs->skip_u2_fast(size);
1925   } else {
1926     // Verify each value in the checked exception table
1927     u2 checked_exception;
1928     const u2 len = *checked_exceptions_length;
1929     cfs->guarantee_more(2 * len, CHECK_NULL);
1930     for (int i = 0; i < len; i++) {
1931       checked_exception = cfs->get_u2_fast();
1932       check_property(
1933         valid_klass_reference_at(checked_exception),
1934         "Exception name has bad type at constant pool %u in class file %s",
1935         checked_exception, CHECK_NULL);
1936     }
1937   }
1938   // check exceptions attribute length
1939   if (_need_verify) {
1940     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1941                                                    sizeof(u2) * size),
1942                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1943   }
1944   return checked_exceptions_start;
1945 }
1946 
1947 void ClassFileParser::throwIllegalSignature(const char* type,
1948                                             const Symbol* name,
1949                                             const Symbol* sig,
1950                                             TRAPS) const {
1951   assert(name != NULL, "invariant");
1952   assert(sig != NULL, "invariant");
1953 
1954   ResourceMark rm(THREAD);
1955   Exceptions::fthrow(THREAD_AND_LOCATION,
1956       vmSymbols::java_lang_ClassFormatError(),
1957       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1958       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1959 }
1960 
1961 AnnotationCollector::ID
1962 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1963                                       const Symbol* name) {
1964   const vmSymbols::SID sid = vmSymbols::find_sid(name);
1965   // Privileged code can use all annotations.  Other code silently drops some.
1966   const bool privileged = loader_data->is_the_null_class_loader_data() ||
1967                           loader_data->is_platform_class_loader_data() ||
1968                           loader_data->is_anonymous();
1969   switch (sid) {
1970     case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature): {
1971       if (_location != _in_method)  break;  // only allow for methods
1972       if (!privileged)              break;  // only allow in privileged code
1973       return _method_CallerSensitive;
1974     }
1975     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1976       if (_location != _in_method)  break;  // only allow for methods
1977       if (!privileged)              break;  // only allow in privileged code
1978       return _method_ForceInline;
1979     }
1980     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1981       if (_location != _in_method)  break;  // only allow for methods
1982       if (!privileged)              break;  // only allow in privileged code
1983       return _method_DontInline;
1984     }
1985     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1986       if (_location != _in_method)  break;  // only allow for methods
1987       if (!privileged)              break;  // only allow in privileged code
1988       return _method_InjectedProfile;
1989     }
1990     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1991       if (_location != _in_method)  break;  // only allow for methods
1992       if (!privileged)              break;  // only allow in privileged code
1993       return _method_LambdaForm_Compiled;
1994     }
1995     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
1996       if (_location != _in_method)  break;  // only allow for methods
1997       if (!privileged)              break;  // only allow in privileged code
1998       return _method_LambdaForm_Hidden;
1999     }
2000     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2001       if (_location != _in_method)  break;  // only allow for methods
2002       if (!privileged)              break;  // only allow in privileged code
2003       return _method_HotSpotIntrinsicCandidate;
2004     }
2005 #if INCLUDE_JVMCI
2006     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_vm_ci_hotspot_Stable_signature): {
2007       if (_location != _in_field)   break;  // only allow for fields
2008       if (!privileged)              break;  // only allow in privileged code
2009       return _field_Stable;
2010     }
2011 #endif
2012     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2013       if (_location != _in_field)   break;  // only allow for fields
2014       if (!privileged)              break;  // only allow in privileged code
2015       return _field_Stable;
2016     }
2017     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2018       if (_location != _in_field && _location != _in_class) {
2019         break;  // only allow for fields and classes
2020       }
2021       if (!EnableContended || (RestrictContended && !privileged)) {
2022         break;  // honor privileges
2023       }
2024       return _jdk_internal_vm_annotation_Contended;
2025     }
2026     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2027       if (_location != _in_method)  break;  // only allow for methods
2028       if (RestrictReservedStack && !privileged) break; // honor privileges
2029       return _jdk_internal_vm_annotation_ReservedStackAccess;
2030     }
2031     default: {
2032       break;
2033     }
2034   }
2035   return AnnotationCollector::_unknown;
2036 }
2037 
2038 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2039   if (is_contended())
2040     f->set_contended_group(contended_group());
2041   if (is_stable())
2042     f->set_stable(true);
2043 }
2044 
2045 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2046   // If there's an error deallocate metadata for field annotations
2047   MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2048   MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2049 }
2050 
2051 void MethodAnnotationCollector::apply_to(methodHandle m) {
2052   if (has_annotation(_method_CallerSensitive))
2053     m->set_caller_sensitive(true);
2054   if (has_annotation(_method_ForceInline))
2055     m->set_force_inline(true);
2056   if (has_annotation(_method_DontInline))
2057     m->set_dont_inline(true);
2058   if (has_annotation(_method_InjectedProfile))
2059     m->set_has_injected_profile(true);
2060   if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2061     m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2062   if (has_annotation(_method_LambdaForm_Hidden))
2063     m->set_hidden(true);
2064   if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2065     m->set_intrinsic_candidate(true);
2066   if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2067     m->set_has_reserved_stack_access(true);
2068 }
2069 
2070 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2071   assert(ik != NULL, "invariant");
2072   ik->set_is_contended(is_contended());
2073 }
2074 
2075 #define MAX_ARGS_SIZE 255
2076 #define MAX_CODE_SIZE 65535
2077 #define INITIAL_MAX_LVT_NUMBER 256
2078 
2079 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2080  *
2081  * Rules for LVT's and LVTT's are:
2082  *   - There can be any number of LVT's and LVTT's.
2083  *   - If there are n LVT's, it is the same as if there was just
2084  *     one LVT containing all the entries from the n LVT's.
2085  *   - There may be no more than one LVT entry per local variable.
2086  *     Two LVT entries are 'equal' if these fields are the same:
2087  *        start_pc, length, name, slot
2088  *   - There may be no more than one LVTT entry per each LVT entry.
2089  *     Each LVTT entry has to match some LVT entry.
2090  *   - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2091  */
2092 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2093                                                int lvt_cnt,
2094                                                u2* const localvariable_table_length,
2095                                                const u2**const localvariable_table_start,
2096                                                int lvtt_cnt,
2097                                                u2* const localvariable_type_table_length,
2098                                                const u2**const localvariable_type_table_start,
2099                                                TRAPS) {
2100 
2101   ResourceMark rm(THREAD);
2102 
2103   typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2104                             &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2105 
2106   LVT_HashTable* const table = new LVT_HashTable();
2107 
2108   // To fill LocalVariableTable in
2109   const Classfile_LVT_Element* cf_lvt;
2110   LocalVariableTableElement* lvt = cm->localvariable_table_start();
2111 
2112   for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2113     cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2114     for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2115       copy_lvt_element(&cf_lvt[idx], lvt);
2116       // If no duplicates, add LVT elem in hashtable.
2117       if (table->put(*lvt, lvt) == false
2118           && _need_verify
2119           && _major_version >= JAVA_1_5_VERSION) {
2120         classfile_parse_error("Duplicated LocalVariableTable attribute "
2121                               "entry for '%s' in class file %s",
2122                                _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2123                                CHECK);
2124       }
2125     }
2126   }
2127 
2128   // To merge LocalVariableTable and LocalVariableTypeTable
2129   const Classfile_LVT_Element* cf_lvtt;
2130   LocalVariableTableElement lvtt_elem;
2131 
2132   for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2133     cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2134     for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2135       copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2136       LocalVariableTableElement** entry = table->get(lvtt_elem);
2137       if (entry == NULL) {
2138         if (_need_verify) {
2139           classfile_parse_error("LVTT entry for '%s' in class file %s "
2140                                 "does not match any LVT entry",
2141                                  _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2142                                  CHECK);
2143         }
2144       } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2145         classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2146                               "entry for '%s' in class file %s",
2147                                _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2148                                CHECK);
2149       } else {
2150         // to add generic signatures into LocalVariableTable
2151         (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2152       }
2153     }
2154   }
2155 }
2156 
2157 
2158 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2159                                        const u1* runtime_visible_annotations,
2160                                        int runtime_visible_annotations_length,
2161                                        const u1* runtime_invisible_annotations,
2162                                        int runtime_invisible_annotations_length,
2163                                        const u1* runtime_visible_parameter_annotations,
2164                                        int runtime_visible_parameter_annotations_length,
2165                                        const u1* runtime_invisible_parameter_annotations,
2166                                        int runtime_invisible_parameter_annotations_length,
2167                                        const u1* runtime_visible_type_annotations,
2168                                        int runtime_visible_type_annotations_length,
2169                                        const u1* runtime_invisible_type_annotations,
2170                                        int runtime_invisible_type_annotations_length,
2171                                        const u1* annotation_default,
2172                                        int annotation_default_length,
2173                                        TRAPS) {
2174 
2175   AnnotationArray* a;
2176 
2177   if (runtime_visible_annotations_length +
2178       runtime_invisible_annotations_length > 0) {
2179      a = assemble_annotations(runtime_visible_annotations,
2180                               runtime_visible_annotations_length,
2181                               runtime_invisible_annotations,
2182                               runtime_invisible_annotations_length,
2183                               CHECK);
2184      cm->set_method_annotations(a);
2185   }
2186 
2187   if (runtime_visible_parameter_annotations_length +
2188       runtime_invisible_parameter_annotations_length > 0) {
2189     a = assemble_annotations(runtime_visible_parameter_annotations,
2190                              runtime_visible_parameter_annotations_length,
2191                              runtime_invisible_parameter_annotations,
2192                              runtime_invisible_parameter_annotations_length,
2193                              CHECK);
2194     cm->set_parameter_annotations(a);
2195   }
2196 
2197   if (annotation_default_length > 0) {
2198     a = assemble_annotations(annotation_default,
2199                              annotation_default_length,
2200                              NULL,
2201                              0,
2202                              CHECK);
2203     cm->set_default_annotations(a);
2204   }
2205 
2206   if (runtime_visible_type_annotations_length +
2207       runtime_invisible_type_annotations_length > 0) {
2208     a = assemble_annotations(runtime_visible_type_annotations,
2209                              runtime_visible_type_annotations_length,
2210                              runtime_invisible_type_annotations,
2211                              runtime_invisible_type_annotations_length,
2212                              CHECK);
2213     cm->set_type_annotations(a);
2214   }
2215 }
2216 
2217 
2218 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2219 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2220 // Method* to save footprint, so we only know the size of the resulting Method* when the
2221 // entire method attribute is parsed.
2222 //
2223 // The promoted_flags parameter is used to pass relevant access_flags
2224 // from the method back up to the containing klass. These flag values
2225 // are added to klass's access_flags.
2226 
2227 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2228                                       bool is_interface,
2229                                       const ConstantPool* cp,
2230                                       AccessFlags* const promoted_flags,
2231                                       TRAPS) {
2232   assert(cfs != NULL, "invariant");
2233   assert(cp != NULL, "invariant");
2234   assert(promoted_flags != NULL, "invariant");
2235 
2236   ResourceMark rm(THREAD);
2237   // Parse fixed parts:
2238   // access_flags, name_index, descriptor_index, attributes_count
2239   cfs->guarantee_more(8, CHECK_NULL);
2240 
2241   int flags = cfs->get_u2_fast();
2242   const u2 name_index = cfs->get_u2_fast();
2243   const int cp_size = cp->length();
2244   check_property(
2245     valid_symbol_at(name_index),
2246     "Illegal constant pool index %u for method name in class file %s",
2247     name_index, CHECK_NULL);
2248   const Symbol* const name = cp->symbol_at(name_index);
2249   verify_legal_method_name(name, CHECK_NULL);
2250 
2251   const u2 signature_index = cfs->get_u2_fast();
2252   guarantee_property(
2253     valid_symbol_at(signature_index),
2254     "Illegal constant pool index %u for method signature in class file %s",
2255     signature_index, CHECK_NULL);
2256   const Symbol* const signature = cp->symbol_at(signature_index);
2257 
2258   if (name == vmSymbols::class_initializer_name()) {
2259     // We ignore the other access flags for a valid class initializer.
2260     // (JVM Spec 2nd ed., chapter 4.6)
2261     if (_major_version < 51) { // backward compatibility
2262       flags = JVM_ACC_STATIC;
2263     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2264       flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2265     } else {
2266       classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2267     }
2268   } else {
2269     verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2270   }
2271 
2272   if (name == vmSymbols::object_initializer_name() && is_interface) {
2273     classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2274   }
2275 
2276   int args_size = -1;  // only used when _need_verify is true
2277   if (_need_verify) {
2278     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2279                  verify_legal_method_signature(name, signature, CHECK_NULL);
2280     if (args_size > MAX_ARGS_SIZE) {
2281       classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2282     }
2283   }
2284 
2285   AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2286 
2287   // Default values for code and exceptions attribute elements
2288   u2 max_stack = 0;
2289   u2 max_locals = 0;
2290   u4 code_length = 0;
2291   const u1* code_start = 0;
2292   u2 exception_table_length = 0;
2293   const u2* exception_table_start = NULL;
2294   Array<int>* exception_handlers = Universe::the_empty_int_array();
2295   u2 checked_exceptions_length = 0;
2296   const u2* checked_exceptions_start = NULL;
2297   CompressedLineNumberWriteStream* linenumber_table = NULL;
2298   int linenumber_table_length = 0;
2299   int total_lvt_length = 0;
2300   u2 lvt_cnt = 0;
2301   u2 lvtt_cnt = 0;
2302   bool lvt_allocated = false;
2303   u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2304   u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2305   u2* localvariable_table_length = NULL;
2306   const u2** localvariable_table_start = NULL;
2307   u2* localvariable_type_table_length = NULL;
2308   const u2** localvariable_type_table_start = NULL;
2309   int method_parameters_length = -1;
2310   const u1* method_parameters_data = NULL;
2311   bool method_parameters_seen = false;
2312   bool parsed_code_attribute = false;
2313   bool parsed_checked_exceptions_attribute = false;
2314   bool parsed_stackmap_attribute = false;
2315   // stackmap attribute - JDK1.5
2316   const u1* stackmap_data = NULL;
2317   int stackmap_data_length = 0;
2318   u2 generic_signature_index = 0;
2319   MethodAnnotationCollector parsed_annotations;
2320   const u1* runtime_visible_annotations = NULL;
2321   int runtime_visible_annotations_length = 0;
2322   const u1* runtime_invisible_annotations = NULL;
2323   int runtime_invisible_annotations_length = 0;
2324   const u1* runtime_visible_parameter_annotations = NULL;
2325   int runtime_visible_parameter_annotations_length = 0;
2326   const u1* runtime_invisible_parameter_annotations = NULL;
2327   int runtime_invisible_parameter_annotations_length = 0;
2328   const u1* runtime_visible_type_annotations = NULL;
2329   int runtime_visible_type_annotations_length = 0;
2330   const u1* runtime_invisible_type_annotations = NULL;
2331   int runtime_invisible_type_annotations_length = 0;
2332   bool runtime_invisible_annotations_exists = false;
2333   bool runtime_invisible_type_annotations_exists = false;
2334   bool runtime_invisible_parameter_annotations_exists = false;
2335   const u1* annotation_default = NULL;
2336   int annotation_default_length = 0;
2337 
2338   // Parse code and exceptions attribute
2339   u2 method_attributes_count = cfs->get_u2_fast();
2340   while (method_attributes_count--) {
2341     cfs->guarantee_more(6, CHECK_NULL);  // method_attribute_name_index, method_attribute_length
2342     const u2 method_attribute_name_index = cfs->get_u2_fast();
2343     const u4 method_attribute_length = cfs->get_u4_fast();
2344     check_property(
2345       valid_symbol_at(method_attribute_name_index),
2346       "Invalid method attribute name index %u in class file %s",
2347       method_attribute_name_index, CHECK_NULL);
2348 
2349     const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2350     if (method_attribute_name == vmSymbols::tag_code()) {
2351       // Parse Code attribute
2352       if (_need_verify) {
2353         guarantee_property(
2354             !access_flags.is_native() && !access_flags.is_abstract(),
2355                         "Code attribute in native or abstract methods in class file %s",
2356                          CHECK_NULL);
2357       }
2358       if (parsed_code_attribute) {
2359         classfile_parse_error("Multiple Code attributes in class file %s",
2360                               CHECK_NULL);
2361       }
2362       parsed_code_attribute = true;
2363 
2364       // Stack size, locals size, and code size
2365       if (_major_version == 45 && _minor_version <= 2) {
2366         cfs->guarantee_more(4, CHECK_NULL);
2367         max_stack = cfs->get_u1_fast();
2368         max_locals = cfs->get_u1_fast();
2369         code_length = cfs->get_u2_fast();
2370       } else {
2371         cfs->guarantee_more(8, CHECK_NULL);
2372         max_stack = cfs->get_u2_fast();
2373         max_locals = cfs->get_u2_fast();
2374         code_length = cfs->get_u4_fast();
2375       }
2376       if (_need_verify) {
2377         guarantee_property(args_size <= max_locals,
2378                            "Arguments can't fit into locals in class file %s",
2379                            CHECK_NULL);
2380         guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2381                            "Invalid method Code length %u in class file %s",
2382                            code_length, CHECK_NULL);
2383       }
2384       // Code pointer
2385       code_start = cfs->get_u1_buffer();
2386       assert(code_start != NULL, "null code start");
2387       cfs->guarantee_more(code_length, CHECK_NULL);
2388       cfs->skip_u1_fast(code_length);
2389 
2390       // Exception handler table
2391       cfs->guarantee_more(2, CHECK_NULL);  // exception_table_length
2392       exception_table_length = cfs->get_u2_fast();
2393       if (exception_table_length > 0) {
2394         exception_table_start = parse_exception_table(cfs,
2395                                                       code_length,
2396                                                       exception_table_length,
2397                                                       CHECK_NULL);
2398       }
2399 
2400       // Parse additional attributes in code attribute
2401       cfs->guarantee_more(2, CHECK_NULL);  // code_attributes_count
2402       u2 code_attributes_count = cfs->get_u2_fast();
2403 
2404       unsigned int calculated_attribute_length = 0;
2405 
2406       if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2407         calculated_attribute_length =
2408             sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2409       } else {
2410         // max_stack, locals and length are smaller in pre-version 45.2 classes
2411         calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2412       }
2413       calculated_attribute_length +=
2414         code_length +
2415         sizeof(exception_table_length) +
2416         sizeof(code_attributes_count) +
2417         exception_table_length *
2418             ( sizeof(u2) +   // start_pc
2419               sizeof(u2) +   // end_pc
2420               sizeof(u2) +   // handler_pc
2421               sizeof(u2) );  // catch_type_index
2422 
2423       while (code_attributes_count--) {
2424         cfs->guarantee_more(6, CHECK_NULL);  // code_attribute_name_index, code_attribute_length
2425         const u2 code_attribute_name_index = cfs->get_u2_fast();
2426         const u4 code_attribute_length = cfs->get_u4_fast();
2427         calculated_attribute_length += code_attribute_length +
2428                                        sizeof(code_attribute_name_index) +
2429                                        sizeof(code_attribute_length);
2430         check_property(valid_symbol_at(code_attribute_name_index),
2431                        "Invalid code attribute name index %u in class file %s",
2432                        code_attribute_name_index,
2433                        CHECK_NULL);
2434         if (LoadLineNumberTables &&
2435             cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2436           // Parse and compress line number table
2437           parse_linenumber_table(code_attribute_length,
2438                                  code_length,
2439                                  &linenumber_table,
2440                                  CHECK_NULL);
2441 
2442         } else if (LoadLocalVariableTables &&
2443                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2444           // Parse local variable table
2445           if (!lvt_allocated) {
2446             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2447               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2448             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2449               THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2450             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2451               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2452             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2453               THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2454             lvt_allocated = true;
2455           }
2456           if (lvt_cnt == max_lvt_cnt) {
2457             max_lvt_cnt <<= 1;
2458             localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2459             localvariable_table_start  = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2460           }
2461           localvariable_table_start[lvt_cnt] =
2462             parse_localvariable_table(cfs,
2463                                       code_length,
2464                                       max_locals,
2465                                       code_attribute_length,
2466                                       &localvariable_table_length[lvt_cnt],
2467                                       false,    // is not LVTT
2468                                       CHECK_NULL);
2469           total_lvt_length += localvariable_table_length[lvt_cnt];
2470           lvt_cnt++;
2471         } else if (LoadLocalVariableTypeTables &&
2472                    _major_version >= JAVA_1_5_VERSION &&
2473                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2474           if (!lvt_allocated) {
2475             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2476               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2477             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2478               THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2479             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2480               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2481             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2482               THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2483             lvt_allocated = true;
2484           }
2485           // Parse local variable type table
2486           if (lvtt_cnt == max_lvtt_cnt) {
2487             max_lvtt_cnt <<= 1;
2488             localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2489             localvariable_type_table_start  = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2490           }
2491           localvariable_type_table_start[lvtt_cnt] =
2492             parse_localvariable_table(cfs,
2493                                       code_length,
2494                                       max_locals,
2495                                       code_attribute_length,
2496                                       &localvariable_type_table_length[lvtt_cnt],
2497                                       true,     // is LVTT
2498                                       CHECK_NULL);
2499           lvtt_cnt++;
2500         } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2501                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2502           // Stack map is only needed by the new verifier in JDK1.5.
2503           if (parsed_stackmap_attribute) {
2504             classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2505           }
2506           stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2507           stackmap_data_length = code_attribute_length;
2508           parsed_stackmap_attribute = true;
2509         } else {
2510           // Skip unknown attributes
2511           cfs->skip_u1(code_attribute_length, CHECK_NULL);
2512         }
2513       }
2514       // check method attribute length
2515       if (_need_verify) {
2516         guarantee_property(method_attribute_length == calculated_attribute_length,
2517                            "Code segment has wrong length in class file %s",
2518                            CHECK_NULL);
2519       }
2520     } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2521       // Parse Exceptions attribute
2522       if (parsed_checked_exceptions_attribute) {
2523         classfile_parse_error("Multiple Exceptions attributes in class file %s",
2524                               CHECK_NULL);
2525       }
2526       parsed_checked_exceptions_attribute = true;
2527       checked_exceptions_start =
2528             parse_checked_exceptions(cfs,
2529                                      &checked_exceptions_length,
2530                                      method_attribute_length,
2531                                      CHECK_NULL);
2532     } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2533       // reject multiple method parameters
2534       if (method_parameters_seen) {
2535         classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2536                               CHECK_NULL);
2537       }
2538       method_parameters_seen = true;
2539       method_parameters_length = cfs->get_u1_fast();
2540       const u2 real_length = (method_parameters_length * 4u) + 1u;
2541       if (method_attribute_length != real_length) {
2542         classfile_parse_error(
2543           "Invalid MethodParameters method attribute length %u in class file",
2544           method_attribute_length, CHECK_NULL);
2545       }
2546       method_parameters_data = cfs->get_u1_buffer();
2547       cfs->skip_u2_fast(method_parameters_length);
2548       cfs->skip_u2_fast(method_parameters_length);
2549       // ignore this attribute if it cannot be reflected
2550       if (!SystemDictionary::Parameter_klass_loaded())
2551         method_parameters_length = -1;
2552     } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2553       if (method_attribute_length != 0) {
2554         classfile_parse_error(
2555           "Invalid Synthetic method attribute length %u in class file %s",
2556           method_attribute_length, CHECK_NULL);
2557       }
2558       // Should we check that there hasn't already been a synthetic attribute?
2559       access_flags.set_is_synthetic();
2560     } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2561       if (method_attribute_length != 0) {
2562         classfile_parse_error(
2563           "Invalid Deprecated method attribute length %u in class file %s",
2564           method_attribute_length, CHECK_NULL);
2565       }
2566     } else if (_major_version >= JAVA_1_5_VERSION) {
2567       if (method_attribute_name == vmSymbols::tag_signature()) {
2568         if (method_attribute_length != 2) {
2569           classfile_parse_error(
2570             "Invalid Signature attribute length %u in class file %s",
2571             method_attribute_length, CHECK_NULL);
2572         }
2573         generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2574       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2575         if (runtime_visible_annotations != NULL) {
2576           classfile_parse_error(
2577             "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2578             CHECK_NULL);
2579         }
2580         runtime_visible_annotations_length = method_attribute_length;
2581         runtime_visible_annotations = cfs->get_u1_buffer();
2582         assert(runtime_visible_annotations != NULL, "null visible annotations");
2583         parse_annotations(cp,
2584                           runtime_visible_annotations,
2585                           runtime_visible_annotations_length,
2586                           &parsed_annotations,
2587                           _loader_data,
2588                           CHECK_NULL);
2589         cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL);
2590       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2591         if (runtime_invisible_annotations_exists) {
2592           classfile_parse_error(
2593             "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2594             CHECK_NULL);
2595         }
2596         runtime_invisible_annotations_exists = true;
2597         if (PreserveAllAnnotations) {
2598           runtime_invisible_annotations_length = method_attribute_length;
2599           runtime_invisible_annotations = cfs->get_u1_buffer();
2600           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2601         }
2602         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2603       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2604         if (runtime_visible_parameter_annotations != NULL) {
2605           classfile_parse_error(
2606             "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2607             CHECK_NULL);
2608         }
2609         runtime_visible_parameter_annotations_length = method_attribute_length;
2610         runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2611         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2612         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2613       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2614         if (runtime_invisible_parameter_annotations_exists) {
2615           classfile_parse_error(
2616             "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2617             CHECK_NULL);
2618         }
2619         runtime_invisible_parameter_annotations_exists = true;
2620         if (PreserveAllAnnotations) {
2621           runtime_invisible_parameter_annotations_length = method_attribute_length;
2622           runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2623           assert(runtime_invisible_parameter_annotations != NULL,
2624             "null invisible parameter annotations");
2625         }
2626         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2627       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2628         if (annotation_default != NULL) {
2629           classfile_parse_error(
2630             "Multiple AnnotationDefault attributes for method in class file %s",
2631             CHECK_NULL);
2632         }
2633         annotation_default_length = method_attribute_length;
2634         annotation_default = cfs->get_u1_buffer();
2635         assert(annotation_default != NULL, "null annotation default");
2636         cfs->skip_u1(annotation_default_length, CHECK_NULL);
2637       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2638         if (runtime_visible_type_annotations != NULL) {
2639           classfile_parse_error(
2640             "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2641             CHECK_NULL);
2642         }
2643         runtime_visible_type_annotations_length = method_attribute_length;
2644         runtime_visible_type_annotations = cfs->get_u1_buffer();
2645         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2646         // No need for the VM to parse Type annotations
2647         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2648       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2649         if (runtime_invisible_type_annotations_exists) {
2650           classfile_parse_error(
2651             "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2652             CHECK_NULL);
2653         } else {
2654           runtime_invisible_type_annotations_exists = true;
2655         }
2656         if (PreserveAllAnnotations) {
2657           runtime_invisible_type_annotations_length = method_attribute_length;
2658           runtime_invisible_type_annotations = cfs->get_u1_buffer();
2659           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2660         }
2661         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2662       } else {
2663         // Skip unknown attributes
2664         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2665       }
2666     } else {
2667       // Skip unknown attributes
2668       cfs->skip_u1(method_attribute_length, CHECK_NULL);
2669     }
2670   }
2671 
2672   if (linenumber_table != NULL) {
2673     linenumber_table->write_terminator();
2674     linenumber_table_length = linenumber_table->position();
2675   }
2676 
2677   // Make sure there's at least one Code attribute in non-native/non-abstract method
2678   if (_need_verify) {
2679     guarantee_property(access_flags.is_native() ||
2680                        access_flags.is_abstract() ||
2681                        parsed_code_attribute,
2682                        "Absent Code attribute in method that is not native or abstract in class file %s",
2683                        CHECK_NULL);
2684   }
2685 
2686   // All sizing information for a Method* is finally available, now create it
2687   InlineTableSizes sizes(
2688       total_lvt_length,
2689       linenumber_table_length,
2690       exception_table_length,
2691       checked_exceptions_length,
2692       method_parameters_length,
2693       generic_signature_index,
2694       runtime_visible_annotations_length +
2695            runtime_invisible_annotations_length,
2696       runtime_visible_parameter_annotations_length +
2697            runtime_invisible_parameter_annotations_length,
2698       runtime_visible_type_annotations_length +
2699            runtime_invisible_type_annotations_length,
2700       annotation_default_length,
2701       0);
2702 
2703   Method* const m = Method::allocate(_loader_data,
2704                                      code_length,
2705                                      access_flags,
2706                                      &sizes,
2707                                      ConstMethod::NORMAL,
2708                                      CHECK_NULL);
2709 
2710   ClassLoadingService::add_class_method_size(m->size()*wordSize);
2711 
2712   // Fill in information from fixed part (access_flags already set)
2713   m->set_constants(_cp);
2714   m->set_name_index(name_index);
2715   m->set_signature_index(signature_index);
2716 #ifdef CC_INTERP
2717   // hmm is there a gc issue here??
2718   ResultTypeFinder rtf(cp->symbol_at(signature_index));
2719   m->set_result_index(rtf.type());
2720 #endif
2721 
2722   if (args_size >= 0) {
2723     m->set_size_of_parameters(args_size);
2724   } else {
2725     m->compute_size_of_parameters(THREAD);
2726   }
2727 #ifdef ASSERT
2728   if (args_size >= 0) {
2729     m->compute_size_of_parameters(THREAD);
2730     assert(args_size == m->size_of_parameters(), "");
2731   }
2732 #endif
2733 
2734   // Fill in code attribute information
2735   m->set_max_stack(max_stack);
2736   m->set_max_locals(max_locals);
2737   if (stackmap_data != NULL) {
2738     m->constMethod()->copy_stackmap_data(_loader_data,
2739                                          (u1*)stackmap_data,
2740                                          stackmap_data_length,
2741                                          CHECK_NULL);
2742   }
2743 
2744   // Copy byte codes
2745   m->set_code((u1*)code_start);
2746 
2747   // Copy line number table
2748   if (linenumber_table != NULL) {
2749     memcpy(m->compressed_linenumber_table(),
2750            linenumber_table->buffer(),
2751            linenumber_table_length);
2752   }
2753 
2754   // Copy exception table
2755   if (exception_table_length > 0) {
2756     int size =
2757       exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2758     copy_u2_with_conversion((u2*) m->exception_table_start(),
2759                             exception_table_start, size);
2760   }
2761 
2762   // Copy method parameters
2763   if (method_parameters_length > 0) {
2764     MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2765     for (int i = 0; i < method_parameters_length; i++) {
2766       elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2767       method_parameters_data += 2;
2768       elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2769       method_parameters_data += 2;
2770     }
2771   }
2772 
2773   // Copy checked exceptions
2774   if (checked_exceptions_length > 0) {
2775     const int size =
2776       checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2777     copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2778                             checked_exceptions_start,
2779                             size);
2780   }
2781 
2782   // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2783   if (total_lvt_length > 0) {
2784     promoted_flags->set_has_localvariable_table();
2785     copy_localvariable_table(m->constMethod(),
2786                              lvt_cnt,
2787                              localvariable_table_length,
2788                              localvariable_table_start,
2789                              lvtt_cnt,
2790                              localvariable_type_table_length,
2791                              localvariable_type_table_start,
2792                              CHECK_NULL);
2793   }
2794 
2795   if (parsed_annotations.has_any_annotations())
2796     parsed_annotations.apply_to(m);
2797 
2798   // Copy annotations
2799   copy_method_annotations(m->constMethod(),
2800                           runtime_visible_annotations,
2801                           runtime_visible_annotations_length,
2802                           runtime_invisible_annotations,
2803                           runtime_invisible_annotations_length,
2804                           runtime_visible_parameter_annotations,
2805                           runtime_visible_parameter_annotations_length,
2806                           runtime_invisible_parameter_annotations,
2807                           runtime_invisible_parameter_annotations_length,
2808                           runtime_visible_type_annotations,
2809                           runtime_visible_type_annotations_length,
2810                           runtime_invisible_type_annotations,
2811                           runtime_invisible_type_annotations_length,
2812                           annotation_default,
2813                           annotation_default_length,
2814                           CHECK_NULL);
2815 
2816   if (name == vmSymbols::finalize_method_name() &&
2817       signature == vmSymbols::void_method_signature()) {
2818     if (m->is_empty_method()) {
2819       _has_empty_finalizer = true;
2820     } else {
2821       _has_finalizer = true;
2822     }
2823   }
2824   if (name == vmSymbols::object_initializer_name() &&
2825       signature == vmSymbols::void_method_signature() &&
2826       m->is_vanilla_constructor()) {
2827     _has_vanilla_constructor = true;
2828   }
2829 
2830   NOT_PRODUCT(m->verify());
2831   return m;
2832 }
2833 
2834 
2835 // The promoted_flags parameter is used to pass relevant access_flags
2836 // from the methods back up to the containing klass. These flag values
2837 // are added to klass's access_flags.
2838 // Side-effects: populates the _methods field in the parser
2839 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2840                                     bool is_interface,
2841                                     AccessFlags* promoted_flags,
2842                                     bool* has_final_method,
2843                                     bool* declares_default_methods,
2844                                     TRAPS) {
2845   assert(cfs != NULL, "invariant");
2846   assert(promoted_flags != NULL, "invariant");
2847   assert(has_final_method != NULL, "invariant");
2848   assert(declares_default_methods != NULL, "invariant");
2849 
2850   assert(NULL == _methods, "invariant");
2851 
2852   cfs->guarantee_more(2, CHECK);  // length
2853   const u2 length = cfs->get_u2_fast();
2854   if (length == 0) {
2855     _methods = Universe::the_empty_method_array();
2856   } else {
2857     _methods = MetadataFactory::new_array<Method*>(_loader_data,
2858                                                    length,
2859                                                    NULL,
2860                                                    CHECK);
2861 
2862     HandleMark hm(THREAD);
2863     for (int index = 0; index < length; index++) {
2864       Method* method = parse_method(cfs,
2865                                     is_interface,
2866                                     _cp,
2867                                     promoted_flags,
2868                                     CHECK);
2869 
2870       if (method->is_final()) {
2871         *has_final_method = true;
2872       }
2873       // declares_default_methods: declares concrete instance methods, any access flags
2874       // used for interface initialization, and default method inheritance analysis
2875       if (is_interface && !(*declares_default_methods)
2876         && !method->is_abstract() && !method->is_static()) {
2877         *declares_default_methods = true;
2878       }
2879       _methods->at_put(index, method);
2880     }
2881 
2882     if (_need_verify && length > 1) {
2883       // Check duplicated methods
2884       ResourceMark rm(THREAD);
2885       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2886         THREAD, NameSigHash*, HASH_ROW_SIZE);
2887       initialize_hashtable(names_and_sigs);
2888       bool dup = false;
2889       {
2890         debug_only(NoSafepointVerifier nsv;)
2891         for (int i = 0; i < length; i++) {
2892           const Method* const m = _methods->at(i);
2893           // If no duplicates, add name/signature in hashtable names_and_sigs.
2894           if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2895             dup = true;
2896             break;
2897           }
2898         }
2899       }
2900       if (dup) {
2901         classfile_parse_error("Duplicate method name&signature in class file %s",
2902                               CHECK);
2903       }
2904     }
2905   }
2906 }
2907 
2908 static const intArray* sort_methods(Array<Method*>* methods) {
2909   const int length = methods->length();
2910   // If JVMTI original method ordering or sharing is enabled we have to
2911   // remember the original class file ordering.
2912   // We temporarily use the vtable_index field in the Method* to store the
2913   // class file index, so we can read in after calling qsort.
2914   // Put the method ordering in the shared archive.
2915   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2916     for (int index = 0; index < length; index++) {
2917       Method* const m = methods->at(index);
2918       assert(!m->valid_vtable_index(), "vtable index should not be set");
2919       m->set_vtable_index(index);
2920     }
2921   }
2922   // Sort method array by ascending method name (for faster lookups & vtable construction)
2923   // Note that the ordering is not alphabetical, see Symbol::fast_compare
2924   Method::sort_methods(methods);
2925 
2926   intArray* method_ordering = NULL;
2927   // If JVMTI original method ordering or sharing is enabled construct int
2928   // array remembering the original ordering
2929   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2930     method_ordering = new intArray(length, length, -1);
2931     for (int index = 0; index < length; index++) {
2932       Method* const m = methods->at(index);
2933       const int old_index = m->vtable_index();
2934       assert(old_index >= 0 && old_index < length, "invalid method index");
2935       method_ordering->at_put(index, old_index);
2936       m->set_vtable_index(Method::invalid_vtable_index);
2937     }
2938   }
2939   return method_ordering;
2940 }
2941 
2942 // Parse generic_signature attribute for methods and fields
2943 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2944                                                       TRAPS) {
2945   assert(cfs != NULL, "invariant");
2946 
2947   cfs->guarantee_more(2, CHECK_0);  // generic_signature_index
2948   const u2 generic_signature_index = cfs->get_u2_fast();
2949   check_property(
2950     valid_symbol_at(generic_signature_index),
2951     "Invalid Signature attribute at constant pool index %u in class file %s",
2952     generic_signature_index, CHECK_0);
2953   return generic_signature_index;
2954 }
2955 
2956 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2957                                                            TRAPS) {
2958 
2959   assert(cfs != NULL, "invariant");
2960 
2961   cfs->guarantee_more(2, CHECK);  // sourcefile_index
2962   const u2 sourcefile_index = cfs->get_u2_fast();
2963   check_property(
2964     valid_symbol_at(sourcefile_index),
2965     "Invalid SourceFile attribute at constant pool index %u in class file %s",
2966     sourcefile_index, CHECK);
2967   set_class_sourcefile_index(sourcefile_index);
2968 }
2969 
2970 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2971                                                                        int length,
2972                                                                        TRAPS) {
2973   assert(cfs != NULL, "invariant");
2974 
2975   const u1* const sde_buffer = cfs->get_u1_buffer();
2976   assert(sde_buffer != NULL, "null sde buffer");
2977 
2978   // Don't bother storing it if there is no way to retrieve it
2979   if (JvmtiExport::can_get_source_debug_extension()) {
2980     assert((length+1) > length, "Overflow checking");
2981     u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2982     for (int i = 0; i < length; i++) {
2983       sde[i] = sde_buffer[i];
2984     }
2985     sde[length] = '\0';
2986     set_class_sde_buffer((const char*)sde, length);
2987   }
2988   // Got utf8 string, set stream position forward
2989   cfs->skip_u1(length, CHECK);
2990 }
2991 
2992 
2993 // Inner classes can be static, private or protected (classic VM does this)
2994 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2995                                            JVM_ACC_PRIVATE |                \
2996                                            JVM_ACC_PROTECTED |              \
2997                                            JVM_ACC_STATIC                   \
2998                                          )
2999 
3000 // Return number of classes in the inner classes attribute table
3001 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3002                                                             const u1* const inner_classes_attribute_start,
3003                                                             bool parsed_enclosingmethod_attribute,
3004                                                             u2 enclosing_method_class_index,
3005                                                             u2 enclosing_method_method_index,
3006                                                             TRAPS) {
3007   const u1* const current_mark = cfs->current();
3008   u2 length = 0;
3009   if (inner_classes_attribute_start != NULL) {
3010     cfs->set_current(inner_classes_attribute_start);
3011     cfs->guarantee_more(2, CHECK_0);  // length
3012     length = cfs->get_u2_fast();
3013   }
3014 
3015   // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3016   // method data:
3017   //   [inner_class_info_index,
3018   //    outer_class_info_index,
3019   //    inner_name_index,
3020   //    inner_class_access_flags,
3021   //    ...
3022   //    enclosing_method_class_index,
3023   //    enclosing_method_method_index]
3024   const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3025   Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3026   _inner_classes = inner_classes;
3027 
3028   int index = 0;
3029   const int cp_size = _cp->length();
3030   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
3031   for (int n = 0; n < length; n++) {
3032     // Inner class index
3033     const u2 inner_class_info_index = cfs->get_u2_fast();
3034     check_property(
3035       valid_klass_reference_at(inner_class_info_index),
3036       "inner_class_info_index %u has bad constant type in class file %s",
3037       inner_class_info_index, CHECK_0);
3038     // Outer class index
3039     const u2 outer_class_info_index = cfs->get_u2_fast();
3040     check_property(
3041       outer_class_info_index == 0 ||
3042         valid_klass_reference_at(outer_class_info_index),
3043       "outer_class_info_index %u has bad constant type in class file %s",
3044       outer_class_info_index, CHECK_0);
3045     // Inner class name
3046     const u2 inner_name_index = cfs->get_u2_fast();
3047     check_property(
3048       inner_name_index == 0 || valid_symbol_at(inner_name_index),
3049       "inner_name_index %u has bad constant type in class file %s",
3050       inner_name_index, CHECK_0);
3051     if (_need_verify) {
3052       guarantee_property(inner_class_info_index != outer_class_info_index,
3053                          "Class is both outer and inner class in class file %s", CHECK_0);
3054     }
3055     // Access flags
3056     jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3057     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3058       // Set abstract bit for old class files for backward compatibility
3059       flags |= JVM_ACC_ABSTRACT;
3060     }
3061     verify_legal_class_modifiers(flags, CHECK_0);
3062     AccessFlags inner_access_flags(flags);
3063 
3064     inner_classes->at_put(index++, inner_class_info_index);
3065     inner_classes->at_put(index++, outer_class_info_index);
3066     inner_classes->at_put(index++, inner_name_index);
3067     inner_classes->at_put(index++, inner_access_flags.as_short());
3068   }
3069 
3070   // 4347400: make sure there's no duplicate entry in the classes array
3071   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3072     for(int i = 0; i < length * 4; i += 4) {
3073       for(int j = i + 4; j < length * 4; j += 4) {
3074         guarantee_property((inner_classes->at(i)   != inner_classes->at(j) ||
3075                             inner_classes->at(i+1) != inner_classes->at(j+1) ||
3076                             inner_classes->at(i+2) != inner_classes->at(j+2) ||
3077                             inner_classes->at(i+3) != inner_classes->at(j+3)),
3078                             "Duplicate entry in InnerClasses in class file %s",
3079                             CHECK_0);
3080       }
3081     }
3082   }
3083 
3084   // Set EnclosingMethod class and method indexes.
3085   if (parsed_enclosingmethod_attribute) {
3086     inner_classes->at_put(index++, enclosing_method_class_index);
3087     inner_classes->at_put(index++, enclosing_method_method_index);
3088   }
3089   assert(index == size, "wrong size");
3090 
3091   // Restore buffer's current position.
3092   cfs->set_current(current_mark);
3093 
3094   return length;
3095 }
3096 
3097 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3098   set_class_synthetic_flag(true);
3099 }
3100 
3101 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3102   assert(cfs != NULL, "invariant");
3103 
3104   const u2 signature_index = cfs->get_u2(CHECK);
3105   check_property(
3106     valid_symbol_at(signature_index),
3107     "Invalid constant pool index %u in Signature attribute in class file %s",
3108     signature_index, CHECK);
3109   set_class_generic_signature_index(signature_index);
3110 }
3111 
3112 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3113                                                                   ConstantPool* cp,
3114                                                                   u4 attribute_byte_length,
3115                                                                   TRAPS) {
3116   assert(cfs != NULL, "invariant");
3117   assert(cp != NULL, "invariant");
3118 
3119   const u1* const current_start = cfs->current();
3120 
3121   guarantee_property(attribute_byte_length >= sizeof(u2),
3122                      "Invalid BootstrapMethods attribute length %u in class file %s",
3123                      attribute_byte_length,
3124                      CHECK);
3125 
3126   cfs->guarantee_more(attribute_byte_length, CHECK);
3127 
3128   const int attribute_array_length = cfs->get_u2_fast();
3129 
3130   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3131                      "Short length on BootstrapMethods in class file %s",
3132                      CHECK);
3133 
3134 
3135   // The attribute contains a counted array of counted tuples of shorts,
3136   // represending bootstrap specifiers:
3137   //    length*{bootstrap_method_index, argument_count*{argument_index}}
3138   const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3139   // operand_count = number of shorts in attr, except for leading length
3140 
3141   // The attribute is copied into a short[] array.
3142   // The array begins with a series of short[2] pairs, one for each tuple.
3143   const int index_size = (attribute_array_length * 2);
3144 
3145   Array<u2>* const operands =
3146     MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3147 
3148   // Eagerly assign operands so they will be deallocated with the constant
3149   // pool if there is an error.
3150   cp->set_operands(operands);
3151 
3152   int operand_fill_index = index_size;
3153   const int cp_size = cp->length();
3154 
3155   for (int n = 0; n < attribute_array_length; n++) {
3156     // Store a 32-bit offset into the header of the operand array.
3157     ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3158 
3159     // Read a bootstrap specifier.
3160     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
3161     const u2 bootstrap_method_index = cfs->get_u2_fast();
3162     const u2 argument_count = cfs->get_u2_fast();
3163     check_property(
3164       valid_cp_range(bootstrap_method_index, cp_size) &&
3165       cp->tag_at(bootstrap_method_index).is_method_handle(),
3166       "bootstrap_method_index %u has bad constant type in class file %s",
3167       bootstrap_method_index,
3168       CHECK);
3169 
3170     guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3171       "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3172       CHECK);
3173 
3174     operands->at_put(operand_fill_index++, bootstrap_method_index);
3175     operands->at_put(operand_fill_index++, argument_count);
3176 
3177     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
3178     for (int j = 0; j < argument_count; j++) {
3179       const u2 argument_index = cfs->get_u2_fast();
3180       check_property(
3181         valid_cp_range(argument_index, cp_size) &&
3182         cp->tag_at(argument_index).is_loadable_constant(),
3183         "argument_index %u has bad constant type in class file %s",
3184         argument_index,
3185         CHECK);
3186       operands->at_put(operand_fill_index++, argument_index);
3187     }
3188   }
3189   guarantee_property(current_start + attribute_byte_length == cfs->current(),
3190                      "Bad length on BootstrapMethods in class file %s",
3191                      CHECK);
3192 }
3193 
3194 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3195                                                  ConstantPool* cp,
3196                  ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3197                                                  TRAPS) {
3198   assert(cfs != NULL, "invariant");
3199   assert(cp != NULL, "invariant");
3200   assert(parsed_annotations != NULL, "invariant");
3201 
3202   // Set inner classes attribute to default sentinel
3203   _inner_classes = Universe::the_empty_short_array();
3204   cfs->guarantee_more(2, CHECK);  // attributes_count
3205   u2 attributes_count = cfs->get_u2_fast();
3206   bool parsed_sourcefile_attribute = false;
3207   bool parsed_innerclasses_attribute = false;
3208   bool parsed_enclosingmethod_attribute = false;
3209   bool parsed_bootstrap_methods_attribute = false;
3210   const u1* runtime_visible_annotations = NULL;
3211   int runtime_visible_annotations_length = 0;
3212   const u1* runtime_invisible_annotations = NULL;
3213   int runtime_invisible_annotations_length = 0;
3214   const u1* runtime_visible_type_annotations = NULL;
3215   int runtime_visible_type_annotations_length = 0;
3216   const u1* runtime_invisible_type_annotations = NULL;
3217   int runtime_invisible_type_annotations_length = 0;
3218   bool runtime_invisible_type_annotations_exists = false;
3219   bool runtime_invisible_annotations_exists = false;
3220   bool parsed_source_debug_ext_annotations_exist = false;
3221   const u1* inner_classes_attribute_start = NULL;
3222   u4  inner_classes_attribute_length = 0;
3223   u2  enclosing_method_class_index = 0;
3224   u2  enclosing_method_method_index = 0;
3225   // Iterate over attributes
3226   while (attributes_count--) {
3227     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
3228     const u2 attribute_name_index = cfs->get_u2_fast();
3229     const u4 attribute_length = cfs->get_u4_fast();
3230     check_property(
3231       valid_symbol_at(attribute_name_index),
3232       "Attribute name has bad constant pool index %u in class file %s",
3233       attribute_name_index, CHECK);
3234     const Symbol* const tag = cp->symbol_at(attribute_name_index);
3235     if (tag == vmSymbols::tag_source_file()) {
3236       // Check for SourceFile tag
3237       if (_need_verify) {
3238         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3239       }
3240       if (parsed_sourcefile_attribute) {
3241         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3242       } else {
3243         parsed_sourcefile_attribute = true;
3244       }
3245       parse_classfile_sourcefile_attribute(cfs, CHECK);
3246     } else if (tag == vmSymbols::tag_source_debug_extension()) {
3247       // Check for SourceDebugExtension tag
3248       if (parsed_source_debug_ext_annotations_exist) {
3249           classfile_parse_error(
3250             "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3251       }
3252       parsed_source_debug_ext_annotations_exist = true;
3253       parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3254     } else if (tag == vmSymbols::tag_inner_classes()) {
3255       // Check for InnerClasses tag
3256       if (parsed_innerclasses_attribute) {
3257         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3258       } else {
3259         parsed_innerclasses_attribute = true;
3260       }
3261       inner_classes_attribute_start = cfs->get_u1_buffer();
3262       inner_classes_attribute_length = attribute_length;
3263       cfs->skip_u1(inner_classes_attribute_length, CHECK);
3264     } else if (tag == vmSymbols::tag_synthetic()) {
3265       // Check for Synthetic tag
3266       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3267       if (attribute_length != 0) {
3268         classfile_parse_error(
3269           "Invalid Synthetic classfile attribute length %u in class file %s",
3270           attribute_length, CHECK);
3271       }
3272       parse_classfile_synthetic_attribute(CHECK);
3273     } else if (tag == vmSymbols::tag_deprecated()) {
3274       // Check for Deprecatd tag - 4276120
3275       if (attribute_length != 0) {
3276         classfile_parse_error(
3277           "Invalid Deprecated classfile attribute length %u in class file %s",
3278           attribute_length, CHECK);
3279       }
3280     } else if (_major_version >= JAVA_1_5_VERSION) {
3281       if (tag == vmSymbols::tag_signature()) {
3282         if (attribute_length != 2) {
3283           classfile_parse_error(
3284             "Wrong Signature attribute length %u in class file %s",
3285             attribute_length, CHECK);
3286         }
3287         parse_classfile_signature_attribute(cfs, CHECK);
3288       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3289         if (runtime_visible_annotations != NULL) {
3290           classfile_parse_error(
3291             "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3292         }
3293         runtime_visible_annotations_length = attribute_length;
3294         runtime_visible_annotations = cfs->get_u1_buffer();
3295         assert(runtime_visible_annotations != NULL, "null visible annotations");
3296         parse_annotations(cp,
3297                           runtime_visible_annotations,
3298                           runtime_visible_annotations_length,
3299                           parsed_annotations,
3300                           _loader_data,
3301                           CHECK);
3302         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
3303       } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3304         if (runtime_invisible_annotations_exists) {
3305           classfile_parse_error(
3306             "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3307         }
3308         runtime_invisible_annotations_exists = true;
3309         if (PreserveAllAnnotations) {
3310           runtime_invisible_annotations_length = attribute_length;
3311           runtime_invisible_annotations = cfs->get_u1_buffer();
3312           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3313         }
3314         cfs->skip_u1(attribute_length, CHECK);
3315       } else if (tag == vmSymbols::tag_enclosing_method()) {
3316         if (parsed_enclosingmethod_attribute) {
3317           classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3318         } else {
3319           parsed_enclosingmethod_attribute = true;
3320         }
3321         guarantee_property(attribute_length == 4,
3322           "Wrong EnclosingMethod attribute length %u in class file %s",
3323           attribute_length, CHECK);
3324         cfs->guarantee_more(4, CHECK);  // class_index, method_index
3325         enclosing_method_class_index  = cfs->get_u2_fast();
3326         enclosing_method_method_index = cfs->get_u2_fast();
3327         if (enclosing_method_class_index == 0) {
3328           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3329         }
3330         // Validate the constant pool indices and types
3331         check_property(valid_klass_reference_at(enclosing_method_class_index),
3332           "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3333         if (enclosing_method_method_index != 0 &&
3334             (!cp->is_within_bounds(enclosing_method_method_index) ||
3335              !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3336           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3337         }
3338       } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3339                  _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3340         if (parsed_bootstrap_methods_attribute)
3341           classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3342         parsed_bootstrap_methods_attribute = true;
3343         parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3344       } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3345         if (runtime_visible_type_annotations != NULL) {
3346           classfile_parse_error(
3347             "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3348         }
3349         runtime_visible_type_annotations_length = attribute_length;
3350         runtime_visible_type_annotations = cfs->get_u1_buffer();
3351         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3352         // No need for the VM to parse Type annotations
3353         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3354       } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3355         if (runtime_invisible_type_annotations_exists) {
3356           classfile_parse_error(
3357             "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3358         } else {
3359           runtime_invisible_type_annotations_exists = true;
3360         }
3361         if (PreserveAllAnnotations) {
3362           runtime_invisible_type_annotations_length = attribute_length;
3363           runtime_invisible_type_annotations = cfs->get_u1_buffer();
3364           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3365         }
3366         cfs->skip_u1(attribute_length, CHECK);
3367       } else {
3368         // Unknown attribute
3369         cfs->skip_u1(attribute_length, CHECK);
3370       }
3371     } else {
3372       // Unknown attribute
3373       cfs->skip_u1(attribute_length, CHECK);
3374     }
3375   }
3376   _annotations = assemble_annotations(runtime_visible_annotations,
3377                                       runtime_visible_annotations_length,
3378                                       runtime_invisible_annotations,
3379                                       runtime_invisible_annotations_length,
3380                                       CHECK);
3381   _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3382                                            runtime_visible_type_annotations_length,
3383                                            runtime_invisible_type_annotations,
3384                                            runtime_invisible_type_annotations_length,
3385                                            CHECK);
3386 
3387   if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3388     const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3389                             cfs,
3390                             inner_classes_attribute_start,
3391                             parsed_innerclasses_attribute,
3392                             enclosing_method_class_index,
3393                             enclosing_method_method_index,
3394                             CHECK);
3395     if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3396       guarantee_property(
3397         inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3398         "Wrong InnerClasses attribute length in class file %s", CHECK);
3399     }
3400   }
3401 
3402   if (_max_bootstrap_specifier_index >= 0) {
3403     guarantee_property(parsed_bootstrap_methods_attribute,
3404                        "Missing BootstrapMethods attribute in class file %s", CHECK);
3405   }
3406 }
3407 
3408 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3409   assert(k != NULL, "invariant");
3410 
3411   if (_synthetic_flag)
3412     k->set_is_synthetic();
3413   if (_sourcefile_index != 0) {
3414     k->set_source_file_name_index(_sourcefile_index);
3415   }
3416   if (_generic_signature_index != 0) {
3417     k->set_generic_signature_index(_generic_signature_index);
3418   }
3419   if (_sde_buffer != NULL) {
3420     k->set_source_debug_extension(_sde_buffer, _sde_length);
3421   }
3422 }
3423 
3424 // Create the Annotations object that will
3425 // hold the annotations array for the Klass.
3426 void ClassFileParser::create_combined_annotations(TRAPS) {
3427     if (_annotations == NULL &&
3428         _type_annotations == NULL &&
3429         _fields_annotations == NULL &&
3430         _fields_type_annotations == NULL) {
3431       // Don't create the Annotations object unnecessarily.
3432       return;
3433     }
3434 
3435     Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3436     annotations->set_class_annotations(_annotations);
3437     annotations->set_class_type_annotations(_type_annotations);
3438     annotations->set_fields_annotations(_fields_annotations);
3439     annotations->set_fields_type_annotations(_fields_type_annotations);
3440 
3441     // This is the Annotations object that will be
3442     // assigned to InstanceKlass being constructed.
3443     _combined_annotations = annotations;
3444 
3445     // The annotations arrays below has been transfered the
3446     // _combined_annotations so these fields can now be cleared.
3447     _annotations             = NULL;
3448     _type_annotations        = NULL;
3449     _fields_annotations      = NULL;
3450     _fields_type_annotations = NULL;
3451 }
3452 
3453 // Transfer ownership of metadata allocated to the InstanceKlass.
3454 void ClassFileParser::apply_parsed_class_metadata(
3455                                             InstanceKlass* this_klass,
3456                                             int java_fields_count, TRAPS) {
3457   assert(this_klass != NULL, "invariant");
3458 
3459   _cp->set_pool_holder(this_klass);
3460   this_klass->set_constants(_cp);
3461   this_klass->set_fields(_fields, java_fields_count);
3462   this_klass->set_methods(_methods);
3463   this_klass->set_inner_classes(_inner_classes);
3464   this_klass->set_local_interfaces(_local_interfaces);
3465   this_klass->set_transitive_interfaces(_transitive_interfaces);
3466   this_klass->set_annotations(_combined_annotations);
3467 
3468   // Clear out these fields so they don't get deallocated by the destructor
3469   clear_class_metadata();
3470 }
3471 
3472 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3473                                                        int runtime_visible_annotations_length,
3474                                                        const u1* const runtime_invisible_annotations,
3475                                                        int runtime_invisible_annotations_length,
3476                                                        TRAPS) {
3477   AnnotationArray* annotations = NULL;
3478   if (runtime_visible_annotations != NULL ||
3479       runtime_invisible_annotations != NULL) {
3480     annotations = MetadataFactory::new_array<u1>(_loader_data,
3481                                           runtime_visible_annotations_length +
3482                                           runtime_invisible_annotations_length,
3483                                           CHECK_(annotations));
3484     if (runtime_visible_annotations != NULL) {
3485       for (int i = 0; i < runtime_visible_annotations_length; i++) {
3486         annotations->at_put(i, runtime_visible_annotations[i]);
3487       }
3488     }
3489     if (runtime_invisible_annotations != NULL) {
3490       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3491         int append = runtime_visible_annotations_length+i;
3492         annotations->at_put(append, runtime_invisible_annotations[i]);
3493       }
3494     }
3495   }
3496   return annotations;
3497 }
3498 
3499 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3500                                                         const int super_class_index,
3501                                                         const bool need_verify,
3502                                                         TRAPS) {
3503   assert(cp != NULL, "invariant");
3504   const InstanceKlass* super_klass = NULL;
3505 
3506   if (super_class_index == 0) {
3507     check_property(_class_name == vmSymbols::java_lang_Object(),
3508                    "Invalid superclass index %u in class file %s",
3509                    super_class_index,
3510                    CHECK_NULL);
3511   } else {
3512     check_property(valid_klass_reference_at(super_class_index),
3513                    "Invalid superclass index %u in class file %s",
3514                    super_class_index,
3515                    CHECK_NULL);
3516     // The class name should be legal because it is checked when parsing constant pool.
3517     // However, make sure it is not an array type.
3518     bool is_array = false;
3519     if (cp->tag_at(super_class_index).is_klass()) {
3520       super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3521       if (need_verify)
3522         is_array = super_klass->is_array_klass();
3523     } else if (need_verify) {
3524       is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3525     }
3526     if (need_verify) {
3527       guarantee_property(!is_array,
3528                         "Bad superclass name in class file %s", CHECK_NULL);
3529     }
3530   }
3531   return super_klass;
3532 }
3533 
3534 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3535                                           unsigned int nonstatic_oop_map_count,
3536                                           int first_nonstatic_oop_offset) {
3537 
3538   unsigned int map_count =
3539     NULL == super ? 0 : super->nonstatic_oop_map_count();
3540   if (nonstatic_oop_map_count > 0) {
3541     // We have oops to add to map
3542     if (map_count == 0) {
3543       map_count = nonstatic_oop_map_count;
3544     }
3545     else {
3546       // Check whether we should add a new map block or whether the last one can
3547       // be extended
3548       const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3549       const OopMapBlock* const last_map = first_map + map_count - 1;
3550 
3551       const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3552       if (next_offset == first_nonstatic_oop_offset) {
3553         // There is no gap bettwen superklass's last oop field and first
3554         // local oop field, merge maps.
3555         nonstatic_oop_map_count -= 1;
3556       }
3557       else {
3558         // Superklass didn't end with a oop field, add extra maps
3559         assert(next_offset < first_nonstatic_oop_offset, "just checking");
3560       }
3561       map_count += nonstatic_oop_map_count;
3562     }
3563   }
3564   return map_count;
3565 }
3566 
3567 #ifndef PRODUCT
3568 static void print_field_layout(const Symbol* name,
3569                                Array<u2>* fields,
3570                                constantPoolHandle cp,
3571                                int instance_size,
3572                                int instance_fields_start,
3573                                int instance_fields_end,
3574                                int static_fields_end) {
3575 
3576   assert(name != NULL, "invariant");
3577 
3578   tty->print("%s: field layout\n", name->as_klass_external_name());
3579   tty->print("  @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3580   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3581     if (!fs.access_flags().is_static()) {
3582       tty->print("  @%3d \"%s\" %s\n",
3583         fs.offset(),
3584         fs.name()->as_klass_external_name(),
3585         fs.signature()->as_klass_external_name());
3586     }
3587   }
3588   tty->print("  @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3589   tty->print("  @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3590   tty->print("  @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3591   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3592     if (fs.access_flags().is_static()) {
3593       tty->print("  @%3d \"%s\" %s\n",
3594         fs.offset(),
3595         fs.name()->as_klass_external_name(),
3596         fs.signature()->as_klass_external_name());
3597     }
3598   }
3599   tty->print("  @%3d %s\n", static_fields_end, "--- static fields end ---");
3600   tty->print("\n");
3601 }
3602 #endif
3603 
3604 // Values needed for oopmap and InstanceKlass creation
3605 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3606  public:
3607   int*          nonstatic_oop_offsets;
3608   unsigned int* nonstatic_oop_counts;
3609   unsigned int  nonstatic_oop_map_count;
3610   unsigned int  total_oop_map_count;
3611   int           instance_size;
3612   int           nonstatic_field_size;
3613   int           static_field_size;
3614   bool          has_nonstatic_fields;
3615 };
3616 
3617 // Layout fields and fill in FieldLayoutInfo.  Could use more refactoring!
3618 void ClassFileParser::layout_fields(ConstantPool* cp,
3619                                     const FieldAllocationCount* fac,
3620                                     const ClassAnnotationCollector* parsed_annotations,
3621                                     FieldLayoutInfo* info,
3622                                     TRAPS) {
3623 
3624   assert(cp != NULL, "invariant");
3625 
3626   // Field size and offset computation
3627   int nonstatic_field_size = _super_klass == NULL ? 0 :
3628                                _super_klass->nonstatic_field_size();
3629 
3630   // Count the contended fields by type.
3631   //
3632   // We ignore static fields, because @Contended is not supported for them.
3633   // The layout code below will also ignore the static fields.
3634   int nonstatic_contended_count = 0;
3635   FieldAllocationCount fac_contended;
3636   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3637     FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3638     if (fs.is_contended()) {
3639       fac_contended.count[atype]++;
3640       if (!fs.access_flags().is_static()) {
3641         nonstatic_contended_count++;
3642       }
3643     }
3644   }
3645 
3646 
3647   // Calculate the starting byte offsets
3648   int next_static_oop_offset    = InstanceMirrorKlass::offset_of_static_fields();
3649   int next_static_double_offset = next_static_oop_offset +
3650                                       ((fac->count[STATIC_OOP]) * heapOopSize);
3651   if ( fac->count[STATIC_DOUBLE] &&
3652        (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3653         Universe::field_type_should_be_aligned(T_LONG)) ) {
3654     next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3655   }
3656 
3657   int next_static_word_offset   = next_static_double_offset +
3658                                     ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3659   int next_static_short_offset  = next_static_word_offset +
3660                                     ((fac->count[STATIC_WORD]) * BytesPerInt);
3661   int next_static_byte_offset   = next_static_short_offset +
3662                                   ((fac->count[STATIC_SHORT]) * BytesPerShort);
3663 
3664   int nonstatic_fields_start  = instanceOopDesc::base_offset_in_bytes() +
3665                                 nonstatic_field_size * heapOopSize;
3666 
3667   int next_nonstatic_field_offset = nonstatic_fields_start;
3668 
3669   const bool is_contended_class     = parsed_annotations->is_contended();
3670 
3671   // Class is contended, pad before all the fields
3672   if (is_contended_class) {
3673     next_nonstatic_field_offset += ContendedPaddingWidth;
3674   }
3675 
3676   // Compute the non-contended fields count.
3677   // The packing code below relies on these counts to determine if some field
3678   // can be squeezed into the alignment gap. Contended fields are obviously
3679   // exempt from that.
3680   unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3681   unsigned int nonstatic_word_count   = fac->count[NONSTATIC_WORD]   - fac_contended.count[NONSTATIC_WORD];
3682   unsigned int nonstatic_short_count  = fac->count[NONSTATIC_SHORT]  - fac_contended.count[NONSTATIC_SHORT];
3683   unsigned int nonstatic_byte_count   = fac->count[NONSTATIC_BYTE]   - fac_contended.count[NONSTATIC_BYTE];
3684   unsigned int nonstatic_oop_count    = fac->count[NONSTATIC_OOP]    - fac_contended.count[NONSTATIC_OOP];
3685 
3686   // Total non-static fields count, including every contended field
3687   unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3688                                         fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3689                                         fac->count[NONSTATIC_OOP];
3690 
3691   const bool super_has_nonstatic_fields =
3692           (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3693   const bool has_nonstatic_fields =
3694     super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3695 
3696 
3697   // Prepare list of oops for oop map generation.
3698   //
3699   // "offset" and "count" lists are describing the set of contiguous oop
3700   // regions. offset[i] is the start of the i-th region, which then has
3701   // count[i] oops following. Before we know how many regions are required,
3702   // we pessimistically allocate the maps to fit all the oops into the
3703   // distinct regions.
3704   //
3705   // TODO: We add +1 to always allocate non-zero resource arrays; we need
3706   // to figure out if we still need to do this.
3707   unsigned int nonstatic_oop_map_count = 0;
3708   unsigned int max_nonstatic_oop_maps  = fac->count[NONSTATIC_OOP] + 1;
3709 
3710   int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3711             THREAD, int, max_nonstatic_oop_maps);
3712   unsigned int* const nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
3713             THREAD, unsigned int, max_nonstatic_oop_maps);
3714 
3715   int first_nonstatic_oop_offset = 0; // will be set for first oop field
3716 
3717   bool compact_fields   = CompactFields;
3718   int allocation_style = FieldsAllocationStyle;
3719   if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3720     assert(false, "0 <= FieldsAllocationStyle <= 2");
3721     allocation_style = 1; // Optimistic
3722   }
3723 
3724   // The next classes have predefined hard-coded fields offsets
3725   // (see in JavaClasses::compute_hard_coded_offsets()).
3726   // Use default fields allocation order for them.
3727   if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3728       (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3729        _class_name == vmSymbols::java_lang_Class() ||
3730        _class_name == vmSymbols::java_lang_ClassLoader() ||
3731        _class_name == vmSymbols::java_lang_ref_Reference() ||
3732        _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3733        _class_name == vmSymbols::java_lang_StackTraceElement() ||
3734        _class_name == vmSymbols::java_lang_String() ||
3735        _class_name == vmSymbols::java_lang_Throwable() ||
3736        _class_name == vmSymbols::java_lang_Boolean() ||
3737        _class_name == vmSymbols::java_lang_Character() ||
3738        _class_name == vmSymbols::java_lang_Float() ||
3739        _class_name == vmSymbols::java_lang_Double() ||
3740        _class_name == vmSymbols::java_lang_Byte() ||
3741        _class_name == vmSymbols::java_lang_Short() ||
3742        _class_name == vmSymbols::java_lang_Integer() ||
3743        _class_name == vmSymbols::java_lang_Long())) {
3744     allocation_style = 0;     // Allocate oops first
3745     compact_fields   = false; // Don't compact fields
3746   }
3747 
3748   int next_nonstatic_oop_offset = 0;
3749   int next_nonstatic_double_offset = 0;
3750 
3751   // Rearrange fields for a given allocation style
3752   if( allocation_style == 0 ) {
3753     // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3754     next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3755     next_nonstatic_double_offset = next_nonstatic_oop_offset +
3756                                     (nonstatic_oop_count * heapOopSize);
3757   } else if( allocation_style == 1 ) {
3758     // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3759     next_nonstatic_double_offset = next_nonstatic_field_offset;
3760   } else if( allocation_style == 2 ) {
3761     // Fields allocation: oops fields in super and sub classes are together.
3762     if( nonstatic_field_size > 0 && _super_klass != NULL &&
3763         _super_klass->nonstatic_oop_map_size() > 0 ) {
3764       const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3765       const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3766       const OopMapBlock* const last_map = first_map + map_count - 1;
3767       const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3768       if (next_offset == next_nonstatic_field_offset) {
3769         allocation_style = 0;   // allocate oops first
3770         next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3771         next_nonstatic_double_offset = next_nonstatic_oop_offset +
3772                                        (nonstatic_oop_count * heapOopSize);
3773       }
3774     }
3775     if( allocation_style == 2 ) {
3776       allocation_style = 1;     // allocate oops last
3777       next_nonstatic_double_offset = next_nonstatic_field_offset;
3778     }
3779   } else {
3780     ShouldNotReachHere();
3781   }
3782 
3783   int nonstatic_oop_space_count   = 0;
3784   int nonstatic_word_space_count  = 0;
3785   int nonstatic_short_space_count = 0;
3786   int nonstatic_byte_space_count  = 0;
3787   int nonstatic_oop_space_offset = 0;
3788   int nonstatic_word_space_offset = 0;
3789   int nonstatic_short_space_offset = 0;
3790   int nonstatic_byte_space_offset = 0;
3791 
3792   // Try to squeeze some of the fields into the gaps due to
3793   // long/double alignment.
3794   if (nonstatic_double_count > 0) {
3795     int offset = next_nonstatic_double_offset;
3796     next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3797     if (compact_fields && offset != next_nonstatic_double_offset) {
3798       // Allocate available fields into the gap before double field.
3799       int length = next_nonstatic_double_offset - offset;
3800       assert(length == BytesPerInt, "");
3801       nonstatic_word_space_offset = offset;
3802       if (nonstatic_word_count > 0) {
3803         nonstatic_word_count      -= 1;
3804         nonstatic_word_space_count = 1; // Only one will fit
3805         length -= BytesPerInt;
3806         offset += BytesPerInt;
3807       }
3808       nonstatic_short_space_offset = offset;
3809       while (length >= BytesPerShort && nonstatic_short_count > 0) {
3810         nonstatic_short_count       -= 1;
3811         nonstatic_short_space_count += 1;
3812         length -= BytesPerShort;
3813         offset += BytesPerShort;
3814       }
3815       nonstatic_byte_space_offset = offset;
3816       while (length > 0 && nonstatic_byte_count > 0) {
3817         nonstatic_byte_count       -= 1;
3818         nonstatic_byte_space_count += 1;
3819         length -= 1;
3820       }
3821       // Allocate oop field in the gap if there are no other fields for that.
3822       nonstatic_oop_space_offset = offset;
3823       if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3824           allocation_style != 0) { // when oop fields not first
3825         nonstatic_oop_count      -= 1;
3826         nonstatic_oop_space_count = 1; // Only one will fit
3827         length -= heapOopSize;
3828         offset += heapOopSize;
3829       }
3830     }
3831   }
3832 
3833   int next_nonstatic_word_offset = next_nonstatic_double_offset +
3834                                      (nonstatic_double_count * BytesPerLong);
3835   int next_nonstatic_short_offset = next_nonstatic_word_offset +
3836                                       (nonstatic_word_count * BytesPerInt);
3837   int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3838                                      (nonstatic_short_count * BytesPerShort);
3839   int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3840                                        nonstatic_byte_count;
3841 
3842   // let oops jump before padding with this allocation style
3843   if( allocation_style == 1 ) {
3844     next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3845     if( nonstatic_oop_count > 0 ) {
3846       next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3847     }
3848     next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3849   }
3850 
3851   // Iterate over fields again and compute correct offsets.
3852   // The field allocation type was temporarily stored in the offset slot.
3853   // oop fields are located before non-oop fields (static and non-static).
3854   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3855 
3856     // skip already laid out fields
3857     if (fs.is_offset_set()) continue;
3858 
3859     // contended instance fields are handled below
3860     if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3861 
3862     int real_offset = 0;
3863     const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3864 
3865     // pack the rest of the fields
3866     switch (atype) {
3867       case STATIC_OOP:
3868         real_offset = next_static_oop_offset;
3869         next_static_oop_offset += heapOopSize;
3870         break;
3871       case STATIC_BYTE:
3872         real_offset = next_static_byte_offset;
3873         next_static_byte_offset += 1;
3874         break;
3875       case STATIC_SHORT:
3876         real_offset = next_static_short_offset;
3877         next_static_short_offset += BytesPerShort;
3878         break;
3879       case STATIC_WORD:
3880         real_offset = next_static_word_offset;
3881         next_static_word_offset += BytesPerInt;
3882         break;
3883       case STATIC_DOUBLE:
3884         real_offset = next_static_double_offset;
3885         next_static_double_offset += BytesPerLong;
3886         break;
3887       case NONSTATIC_OOP:
3888         if( nonstatic_oop_space_count > 0 ) {
3889           real_offset = nonstatic_oop_space_offset;
3890           nonstatic_oop_space_offset += heapOopSize;
3891           nonstatic_oop_space_count  -= 1;
3892         } else {
3893           real_offset = next_nonstatic_oop_offset;
3894           next_nonstatic_oop_offset += heapOopSize;
3895         }
3896 
3897         // Record this oop in the oop maps
3898         if( nonstatic_oop_map_count > 0 &&
3899             nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3900             real_offset -
3901             int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3902             heapOopSize ) {
3903           // This oop is adjacent to the previous one, add to current oop map
3904           assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3905           nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3906         } else {
3907           // This oop is not adjacent to the previous one, create new oop map
3908           assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3909           nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3910           nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3911           nonstatic_oop_map_count += 1;
3912           if( first_nonstatic_oop_offset == 0 ) { // Undefined
3913             first_nonstatic_oop_offset = real_offset;
3914           }
3915         }
3916         break;
3917       case NONSTATIC_BYTE:
3918         if( nonstatic_byte_space_count > 0 ) {
3919           real_offset = nonstatic_byte_space_offset;
3920           nonstatic_byte_space_offset += 1;
3921           nonstatic_byte_space_count  -= 1;
3922         } else {
3923           real_offset = next_nonstatic_byte_offset;
3924           next_nonstatic_byte_offset += 1;
3925         }
3926         break;
3927       case NONSTATIC_SHORT:
3928         if( nonstatic_short_space_count > 0 ) {
3929           real_offset = nonstatic_short_space_offset;
3930           nonstatic_short_space_offset += BytesPerShort;
3931           nonstatic_short_space_count  -= 1;
3932         } else {
3933           real_offset = next_nonstatic_short_offset;
3934           next_nonstatic_short_offset += BytesPerShort;
3935         }
3936         break;
3937       case NONSTATIC_WORD:
3938         if( nonstatic_word_space_count > 0 ) {
3939           real_offset = nonstatic_word_space_offset;
3940           nonstatic_word_space_offset += BytesPerInt;
3941           nonstatic_word_space_count  -= 1;
3942         } else {
3943           real_offset = next_nonstatic_word_offset;
3944           next_nonstatic_word_offset += BytesPerInt;
3945         }
3946         break;
3947       case NONSTATIC_DOUBLE:
3948         real_offset = next_nonstatic_double_offset;
3949         next_nonstatic_double_offset += BytesPerLong;
3950         break;
3951       default:
3952         ShouldNotReachHere();
3953     }
3954     fs.set_offset(real_offset);
3955   }
3956 
3957 
3958   // Handle the contended cases.
3959   //
3960   // Each contended field should not intersect the cache line with another contended field.
3961   // In the absence of alignment information, we end up with pessimistically separating
3962   // the fields with full-width padding.
3963   //
3964   // Additionally, this should not break alignment for the fields, so we round the alignment up
3965   // for each field.
3966   if (nonstatic_contended_count > 0) {
3967 
3968     // if there is at least one contended field, we need to have pre-padding for them
3969     next_nonstatic_padded_offset += ContendedPaddingWidth;
3970 
3971     // collect all contended groups
3972     BitMap bm(cp->size());
3973     for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3974       // skip already laid out fields
3975       if (fs.is_offset_set()) continue;
3976 
3977       if (fs.is_contended()) {
3978         bm.set_bit(fs.contended_group());
3979       }
3980     }
3981 
3982     int current_group = -1;
3983     while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3984 
3985       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3986 
3987         // skip already laid out fields
3988         if (fs.is_offset_set()) continue;
3989 
3990         // skip non-contended fields and fields from different group
3991         if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3992 
3993         // handle statics below
3994         if (fs.access_flags().is_static()) continue;
3995 
3996         int real_offset = 0;
3997         FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3998 
3999         switch (atype) {
4000           case NONSTATIC_BYTE:
4001             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4002             real_offset = next_nonstatic_padded_offset;
4003             next_nonstatic_padded_offset += 1;
4004             break;
4005 
4006           case NONSTATIC_SHORT:
4007             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4008             real_offset = next_nonstatic_padded_offset;
4009             next_nonstatic_padded_offset += BytesPerShort;
4010             break;
4011 
4012           case NONSTATIC_WORD:
4013             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4014             real_offset = next_nonstatic_padded_offset;
4015             next_nonstatic_padded_offset += BytesPerInt;
4016             break;
4017 
4018           case NONSTATIC_DOUBLE:
4019             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4020             real_offset = next_nonstatic_padded_offset;
4021             next_nonstatic_padded_offset += BytesPerLong;
4022             break;
4023 
4024           case NONSTATIC_OOP:
4025             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4026             real_offset = next_nonstatic_padded_offset;
4027             next_nonstatic_padded_offset += heapOopSize;
4028 
4029             // Record this oop in the oop maps
4030             if( nonstatic_oop_map_count > 0 &&
4031                 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4032                 real_offset -
4033                 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4034                 heapOopSize ) {
4035               // This oop is adjacent to the previous one, add to current oop map
4036               assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4037               nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4038             } else {
4039               // This oop is not adjacent to the previous one, create new oop map
4040               assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4041               nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4042               nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4043               nonstatic_oop_map_count += 1;
4044               if( first_nonstatic_oop_offset == 0 ) { // Undefined
4045                 first_nonstatic_oop_offset = real_offset;
4046               }
4047             }
4048             break;
4049 
4050           default:
4051             ShouldNotReachHere();
4052         }
4053 
4054         if (fs.contended_group() == 0) {
4055           // Contended group defines the equivalence class over the fields:
4056           // the fields within the same contended group are not inter-padded.
4057           // The only exception is default group, which does not incur the
4058           // equivalence, and so requires intra-padding.
4059           next_nonstatic_padded_offset += ContendedPaddingWidth;
4060         }
4061 
4062         fs.set_offset(real_offset);
4063       } // for
4064 
4065       // Start laying out the next group.
4066       // Note that this will effectively pad the last group in the back;
4067       // this is expected to alleviate memory contention effects for
4068       // subclass fields and/or adjacent object.
4069       // If this was the default group, the padding is already in place.
4070       if (current_group != 0) {
4071         next_nonstatic_padded_offset += ContendedPaddingWidth;
4072       }
4073     }
4074 
4075     // handle static fields
4076   }
4077 
4078   // Entire class is contended, pad in the back.
4079   // This helps to alleviate memory contention effects for subclass fields
4080   // and/or adjacent object.
4081   if (is_contended_class) {
4082     next_nonstatic_padded_offset += ContendedPaddingWidth;
4083   }
4084 
4085   int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4086 
4087   int nonstatic_fields_end      = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4088   int instance_end              = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4089   int static_fields_end         = align_size_up(next_static_byte_offset, wordSize);
4090 
4091   int static_field_size         = (static_fields_end -
4092                                    InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4093   nonstatic_field_size          = nonstatic_field_size +
4094                                   (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4095 
4096   int instance_size             = align_object_size(instance_end / wordSize);
4097 
4098   assert(instance_size == align_object_size(align_size_up(
4099          (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4100           wordSize) / wordSize), "consistent layout helper value");
4101 
4102   // Invariant: nonstatic_field end/start should only change if there are
4103   // nonstatic fields in the class, or if the class is contended. We compare
4104   // against the non-aligned value, so that end alignment will not fail the
4105   // assert without actually having the fields.
4106   assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4107          is_contended_class ||
4108          (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4109 
4110   // Number of non-static oop map blocks allocated at end of klass.
4111   const unsigned int total_oop_map_count =
4112     compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4113                           first_nonstatic_oop_offset);
4114 
4115 #ifndef PRODUCT
4116   if (PrintFieldLayout) {
4117     print_field_layout(_class_name,
4118           _fields,
4119           cp,
4120           instance_size,
4121           nonstatic_fields_start,
4122           nonstatic_fields_end,
4123           static_fields_end);
4124   }
4125 
4126 #endif
4127   // Pass back information needed for InstanceKlass creation
4128   info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4129   info->nonstatic_oop_counts = nonstatic_oop_counts;
4130   info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4131   info->total_oop_map_count = total_oop_map_count;
4132   info->instance_size = instance_size;
4133   info->static_field_size = static_field_size;
4134   info->nonstatic_field_size = nonstatic_field_size;
4135   info->has_nonstatic_fields = has_nonstatic_fields;
4136 }
4137 
4138 static void fill_oop_maps(const InstanceKlass* k,
4139                           unsigned int nonstatic_oop_map_count,
4140                           const int* nonstatic_oop_offsets,
4141                           const unsigned int* nonstatic_oop_counts) {
4142 
4143   assert(k != NULL, "invariant");
4144 
4145   OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4146   const InstanceKlass* const super = k->superklass();
4147   const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4148   if (super_count > 0) {
4149     // Copy maps from superklass
4150     OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4151     for (unsigned int i = 0; i < super_count; ++i) {
4152       *this_oop_map++ = *super_oop_map++;
4153     }
4154   }
4155 
4156   if (nonstatic_oop_map_count > 0) {
4157     if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4158       // The counts differ because there is no gap between superklass's last oop
4159       // field and the first local oop field.  Extend the last oop map copied
4160       // from the superklass instead of creating new one.
4161       nonstatic_oop_map_count--;
4162       nonstatic_oop_offsets++;
4163       this_oop_map--;
4164       this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4165       this_oop_map++;
4166     }
4167 
4168     // Add new map blocks, fill them
4169     while (nonstatic_oop_map_count-- > 0) {
4170       this_oop_map->set_offset(*nonstatic_oop_offsets++);
4171       this_oop_map->set_count(*nonstatic_oop_counts++);
4172       this_oop_map++;
4173     }
4174     assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4175            this_oop_map, "sanity");
4176   }
4177 }
4178 
4179 
4180 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4181   assert(ik != NULL, "invariant");
4182 
4183   const Klass* const super = ik->super();
4184 
4185   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4186   // in which case we don't have to register objects as finalizable
4187   if (!_has_empty_finalizer) {
4188     if (_has_finalizer ||
4189         (super != NULL && super->has_finalizer())) {
4190       ik->set_has_finalizer();
4191     }
4192   }
4193 
4194 #ifdef ASSERT
4195   bool f = false;
4196   const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4197                                            vmSymbols::void_method_signature());
4198   if (m != NULL && !m->is_empty_method()) {
4199       f = true;
4200   }
4201 
4202   // Spec doesn't prevent agent from redefinition of empty finalizer.
4203   // Despite the fact that it's generally bad idea and redefined finalizer
4204   // will not work as expected we shouldn't abort vm in this case
4205   if (!ik->has_redefined_this_or_super()) {
4206     assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4207   }
4208 #endif
4209 
4210   // Check if this klass supports the java.lang.Cloneable interface
4211   if (SystemDictionary::Cloneable_klass_loaded()) {
4212     if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4213       ik->set_is_cloneable();
4214     }
4215   }
4216 
4217   // Check if this klass has a vanilla default constructor
4218   if (super == NULL) {
4219     // java.lang.Object has empty default constructor
4220     ik->set_has_vanilla_constructor();
4221   } else {
4222     if (super->has_vanilla_constructor() &&
4223         _has_vanilla_constructor) {
4224       ik->set_has_vanilla_constructor();
4225     }
4226 #ifdef ASSERT
4227     bool v = false;
4228     if (super->has_vanilla_constructor()) {
4229       const Method* const constructor =
4230         ik->find_method(vmSymbols::object_initializer_name(),
4231                        vmSymbols::void_method_signature());
4232       if (constructor != NULL && constructor->is_vanilla_constructor()) {
4233         v = true;
4234       }
4235     }
4236     assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4237 #endif
4238   }
4239 
4240   // If it cannot be fast-path allocated, set a bit in the layout helper.
4241   // See documentation of InstanceKlass::can_be_fastpath_allocated().
4242   assert(ik->size_helper() > 0, "layout_helper is initialized");
4243   if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4244       || ik->is_abstract() || ik->is_interface()
4245       || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4246       || ik->size_helper() >= FastAllocateSizeLimit) {
4247     // Forbid fast-path allocation.
4248     const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4249     ik->set_layout_helper(lh);
4250   }
4251 }
4252 
4253 // Attach super classes and interface classes to class loader data
4254 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4255                                               TRAPS) {
4256   assert(defined_klass != NULL, "invariant");
4257 
4258   ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4259   if (defining_loader_data->is_the_null_class_loader_data()) {
4260       // Dependencies to null class loader data are implicit.
4261       return;
4262   } else {
4263     // add super class dependency
4264     Klass* const super = defined_klass->super();
4265     if (super != NULL) {
4266       defining_loader_data->record_dependency(super, CHECK);
4267     }
4268 
4269     // add super interface dependencies
4270     const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4271     if (local_interfaces != NULL) {
4272       const int length = local_interfaces->length();
4273       for (int i = 0; i < length; i++) {
4274         defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4275       }
4276     }
4277   }
4278 }
4279 
4280 // utility methods for appending an array with check for duplicates
4281 
4282 static void append_interfaces(GrowableArray<Klass*>* result,
4283                               const Array<Klass*>* const ifs) {
4284   // iterate over new interfaces
4285   for (int i = 0; i < ifs->length(); i++) {
4286     Klass* const e = ifs->at(i);
4287     assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4288     // add new interface
4289     result->append_if_missing(e);
4290   }
4291 }
4292 
4293 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4294                                                     Array<Klass*>* local_ifs,
4295                                                     ClassLoaderData* loader_data,
4296                                                     TRAPS) {
4297   assert(local_ifs != NULL, "invariant");
4298   assert(loader_data != NULL, "invariant");
4299 
4300   // Compute maximum size for transitive interfaces
4301   int max_transitive_size = 0;
4302   int super_size = 0;
4303   // Add superclass transitive interfaces size
4304   if (super != NULL) {
4305     super_size = super->transitive_interfaces()->length();
4306     max_transitive_size += super_size;
4307   }
4308   // Add local interfaces' super interfaces
4309   const int local_size = local_ifs->length();
4310   for (int i = 0; i < local_size; i++) {
4311     Klass* const l = local_ifs->at(i);
4312     max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4313   }
4314   // Finally add local interfaces
4315   max_transitive_size += local_size;
4316   // Construct array
4317   if (max_transitive_size == 0) {
4318     // no interfaces, use canonicalized array
4319     return Universe::the_empty_klass_array();
4320   } else if (max_transitive_size == super_size) {
4321     // no new local interfaces added, share superklass' transitive interface array
4322     return super->transitive_interfaces();
4323   } else if (max_transitive_size == local_size) {
4324     // only local interfaces added, share local interface array
4325     return local_ifs;
4326   } else {
4327     ResourceMark rm;
4328     GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4329 
4330     // Copy down from superclass
4331     if (super != NULL) {
4332       append_interfaces(result, super->transitive_interfaces());
4333     }
4334 
4335     // Copy down from local interfaces' superinterfaces
4336     for (int i = 0; i < local_size; i++) {
4337       Klass* const l = local_ifs->at(i);
4338       append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4339     }
4340     // Finally add local interfaces
4341     append_interfaces(result, local_ifs);
4342 
4343     // length will be less than the max_transitive_size if duplicates were removed
4344     const int length = result->length();
4345     assert(length <= max_transitive_size, "just checking");
4346     Array<Klass*>* const new_result =
4347       MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4348     for (int i = 0; i < length; i++) {
4349       Klass* const e = result->at(i);
4350       assert(e != NULL, "just checking");
4351       new_result->at_put(i, e);
4352     }
4353     return new_result;
4354   }
4355 }
4356 
4357 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4358   assert(this_klass != NULL, "invariant");
4359   const Klass* const super = this_klass->super();
4360   if (super != NULL) {
4361     Reflection::VerifyClassAccessResults vca_result =
4362       Reflection::verify_class_access(this_klass, super, false);
4363     if (vca_result != Reflection::ACCESS_OK) {
4364       ResourceMark rm(THREAD);
4365       char* msg =  Reflection::verify_class_access_msg(this_klass, super, vca_result);
4366       if (msg == NULL) {
4367         ResourceMark rm(THREAD);
4368         Exceptions::fthrow(
4369           THREAD_AND_LOCATION,
4370           vmSymbols::java_lang_IllegalAccessError(),
4371           "class %s cannot access its superclass %s",
4372           this_klass->external_name(),
4373           super->external_name());
4374       } else {
4375         // Add additional message content.
4376         Exceptions::fthrow(
4377           THREAD_AND_LOCATION,
4378           vmSymbols::java_lang_IllegalAccessError(),
4379           "superclass access check failed: %s",
4380           msg);
4381       }
4382     }
4383   }
4384 }
4385 
4386 
4387 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4388   assert(this_klass != NULL, "invariant");
4389   const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4390   const int lng = local_interfaces->length();
4391   for (int i = lng - 1; i >= 0; i--) {
4392     Klass* const k = local_interfaces->at(i);
4393     assert (k != NULL && k->is_interface(), "invalid interface");
4394     Reflection::VerifyClassAccessResults vca_result =
4395       Reflection::verify_class_access(this_klass, k, false);
4396     if (vca_result != Reflection::ACCESS_OK) {
4397       ResourceMark rm(THREAD);
4398       char* msg =  Reflection::verify_class_access_msg(this_klass, k, vca_result);
4399       if (msg == NULL) {
4400         Exceptions::fthrow(
4401           THREAD_AND_LOCATION,
4402           vmSymbols::java_lang_IllegalAccessError(),
4403           "class %s cannot access its superinterface %s",
4404           this_klass->external_name(),
4405           k->external_name());
4406       } else {
4407         // Add additional message content.
4408         Exceptions::fthrow(
4409           THREAD_AND_LOCATION,
4410           vmSymbols::java_lang_IllegalAccessError(),
4411           "superinterface check failed: %s",
4412           msg);
4413       }
4414     }
4415   }
4416 }
4417 
4418 
4419 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4420   assert(this_klass != NULL, "invariant");
4421   const Array<Method*>* const methods = this_klass->methods();
4422   const int num_methods = methods->length();
4423 
4424   // go thru each method and check if it overrides a final method
4425   for (int index = 0; index < num_methods; index++) {
4426     const Method* const m = methods->at(index);
4427 
4428     // skip private, static, and <init> methods
4429     if ((!m->is_private() && !m->is_static()) &&
4430         (m->name() != vmSymbols::object_initializer_name())) {
4431 
4432       const Symbol* const name = m->name();
4433       const Symbol* const signature = m->signature();
4434       const Klass* k = this_klass->super();
4435       const Method* super_m = NULL;
4436       while (k != NULL) {
4437         // skip supers that don't have final methods.
4438         if (k->has_final_method()) {
4439           // lookup a matching method in the super class hierarchy
4440           super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4441           if (super_m == NULL) {
4442             break; // didn't find any match; get out
4443           }
4444 
4445           if (super_m->is_final() && !super_m->is_static() &&
4446               // matching method in super is final, and not static
4447               (Reflection::verify_field_access(this_klass,
4448                                                super_m->method_holder(),
4449                                                super_m->method_holder(),
4450                                                super_m->access_flags(), false))
4451             // this class can access super final method and therefore override
4452             ) {
4453             ResourceMark rm(THREAD);
4454             Exceptions::fthrow(
4455               THREAD_AND_LOCATION,
4456               vmSymbols::java_lang_VerifyError(),
4457               "class %s overrides final method %s.%s%s",
4458               this_klass->external_name(),
4459               super_m->method_holder()->external_name(),
4460               name->as_C_string(),
4461               signature->as_C_string()
4462             );
4463             return;
4464           }
4465 
4466           // continue to look from super_m's holder's super.
4467           k = super_m->method_holder()->super();
4468           continue;
4469         }
4470 
4471         k = k->super();
4472       }
4473     }
4474   }
4475 }
4476 
4477 
4478 // assumes that this_klass is an interface
4479 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4480   assert(this_klass != NULL, "invariant");
4481   assert(this_klass->is_interface(), "not an interface");
4482   const Array<Method*>* methods = this_klass->methods();
4483   const int num_methods = methods->length();
4484 
4485   for (int index = 0; index < num_methods; index++) {
4486     const Method* const m = methods->at(index);
4487     // if m is static and not the init method, throw a verify error
4488     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4489       ResourceMark rm(THREAD);
4490       Exceptions::fthrow(
4491         THREAD_AND_LOCATION,
4492         vmSymbols::java_lang_VerifyError(),
4493         "Illegal static method %s in interface %s",
4494         m->name()->as_C_string(),
4495         this_klass->external_name()
4496       );
4497       return;
4498     }
4499   }
4500 }
4501 
4502 // utility methods for format checking
4503 
4504 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4505   if (!_need_verify) { return; }
4506 
4507   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
4508   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
4509   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
4510   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
4511   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
4512   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4513   const bool is_module_info= (flags & JVM_ACC_MODULE)     != 0;
4514   const bool major_gte_15  = _major_version >= JAVA_1_5_VERSION;
4515 
4516   if ((is_abstract && is_final) ||
4517       (is_interface && !is_abstract) ||
4518       (is_interface && major_gte_15 && (is_super || is_enum)) ||
4519       (!is_interface && major_gte_15 && is_annotation) ||
4520       is_module_info) {
4521     ResourceMark rm(THREAD);
4522     Exceptions::fthrow(
4523       THREAD_AND_LOCATION,
4524       vmSymbols::java_lang_ClassFormatError(),
4525       "Illegal class modifiers in class %s: 0x%X",
4526       _class_name->as_C_string(), flags
4527     );
4528     return;
4529   }
4530 }
4531 
4532 static bool has_illegal_visibility(jint flags) {
4533   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4534   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4535   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4536 
4537   return ((is_public && is_protected) ||
4538           (is_public && is_private) ||
4539           (is_protected && is_private));
4540 }
4541 
4542 static bool is_supported_version(u2 major, u2 minor){
4543   const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4544   return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4545          (major <= max_version) &&
4546          ((major != max_version) ||
4547           (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4548 }
4549 
4550 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4551                                                    bool is_interface,
4552                                                    TRAPS) const {
4553   if (!_need_verify) { return; }
4554 
4555   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4556   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4557   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4558   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
4559   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
4560   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
4561   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4562   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
4563   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4564 
4565   bool is_illegal = false;
4566 
4567   if (is_interface) {
4568     if (!is_public || !is_static || !is_final || is_private ||
4569         is_protected || is_volatile || is_transient ||
4570         (major_gte_15 && is_enum)) {
4571       is_illegal = true;
4572     }
4573   } else { // not interface
4574     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4575       is_illegal = true;
4576     }
4577   }
4578 
4579   if (is_illegal) {
4580     ResourceMark rm(THREAD);
4581     Exceptions::fthrow(
4582       THREAD_AND_LOCATION,
4583       vmSymbols::java_lang_ClassFormatError(),
4584       "Illegal field modifiers in class %s: 0x%X",
4585       _class_name->as_C_string(), flags);
4586     return;
4587   }
4588 }
4589 
4590 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4591                                                     bool is_interface,
4592                                                     const Symbol* name,
4593                                                     TRAPS) const {
4594   if (!_need_verify) { return; }
4595 
4596   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
4597   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
4598   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
4599   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
4600   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
4601   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
4602   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
4603   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
4604   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4605   const bool is_protected    = (flags & JVM_ACC_PROTECTED)    != 0;
4606   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
4607   const bool major_gte_8     = _major_version >= JAVA_8_VERSION;
4608   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
4609 
4610   bool is_illegal = false;
4611 
4612   if (is_interface) {
4613     if (major_gte_8) {
4614       // Class file version is JAVA_8_VERSION or later Methods of
4615       // interfaces may set any of the flags except ACC_PROTECTED,
4616       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4617       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4618       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4619           (is_native || is_protected || is_final || is_synchronized) ||
4620           // If a specific method of a class or interface has its
4621           // ACC_ABSTRACT flag set, it must not have any of its
4622           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4623           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
4624           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4625           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4626           (is_abstract && (is_private || is_static || is_strict))) {
4627         is_illegal = true;
4628       }
4629     } else if (major_gte_15) {
4630       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4631       if (!is_public || is_private || is_protected || is_static || is_final ||
4632           is_synchronized || is_native || !is_abstract || is_strict) {
4633         is_illegal = true;
4634       }
4635     } else {
4636       // Class file version is pre-JAVA_1_5_VERSION
4637       if (!is_public || is_static || is_final || is_native || !is_abstract) {
4638         is_illegal = true;
4639       }
4640     }
4641   } else { // not interface
4642     if (has_illegal_visibility(flags)) {
4643       is_illegal = true;
4644     } else {
4645       if (is_initializer) {
4646         if (is_static || is_final || is_synchronized || is_native ||
4647             is_abstract || (major_gte_15 && is_bridge)) {
4648           is_illegal = true;
4649         }
4650       } else { // not initializer
4651         if (is_abstract) {
4652           if ((is_final || is_native || is_private || is_static ||
4653               (major_gte_15 && (is_synchronized || is_strict)))) {
4654             is_illegal = true;
4655           }
4656         }
4657       }
4658     }
4659   }
4660 
4661   if (is_illegal) {
4662     ResourceMark rm(THREAD);
4663     Exceptions::fthrow(
4664       THREAD_AND_LOCATION,
4665       vmSymbols::java_lang_ClassFormatError(),
4666       "Method %s in class %s has illegal modifiers: 0x%X",
4667       name->as_C_string(), _class_name->as_C_string(), flags);
4668     return;
4669   }
4670 }
4671 
4672 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4673                                         int length,
4674                                         TRAPS) const {
4675   assert(_need_verify, "only called when _need_verify is true");
4676   if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4677     classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4678   }
4679 }
4680 
4681 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4682 // Method names also may not contain the characters '<' or '>', unless <init>
4683 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
4684 // method.  Because these names have been checked as special cases before
4685 // calling this method in verify_legal_method_name.
4686 //
4687 // This method is also called from the modular system APIs in modules.cpp
4688 // to verify the validity of module and package names.
4689 bool ClassFileParser::verify_unqualified_name(const char* name,
4690                                               unsigned int length,
4691                                               int type) {
4692   for (const char* p = name; p != name + length;) {
4693     jchar ch = *p;
4694     if (ch < 128) {
4695       if (ch == '.') {
4696         // permit '.' in module names unless it's the first char, or
4697         // preceding char is also a '.', or last char is a '.'.
4698         if ((type != ClassFileParser::LegalModule) ||
4699           (p == name) || (*(p-1) == '.') ||
4700           (p == name + length - 1)) {
4701           return false;
4702         }
4703       }
4704       if (ch == ';' || ch == '[' ) {
4705         return false;   // do not permit '.', ';', or '['
4706       }
4707       if (type != ClassFileParser::LegalClass && ch == '/') {
4708         return false;   // do not permit '/' unless it's class name
4709       }
4710       if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4711         return false;   // do not permit '<' or '>' in method names
4712       }
4713       p++;
4714     } else {
4715       char* tmp_p = UTF8::next(p, &ch);
4716       p = tmp_p;
4717     }
4718   }
4719   return true;
4720 }
4721 
4722 // Take pointer to a string. Skip over the longest part of the string that could
4723 // be taken as a fieldname. Allow '/' if slash_ok is true.
4724 // Return a pointer to just past the fieldname.
4725 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4726 // being true, we saw consecutive slashes (meaning we were looking for a
4727 // qualified path but found something that was badly-formed).
4728 static const char* skip_over_field_name(const char* name,
4729                                         bool slash_ok,
4730                                         unsigned int length) {
4731   const char* p;
4732   jboolean last_is_slash = false;
4733   jboolean not_first_ch = false;
4734 
4735   for (p = name; p != name + length; not_first_ch = true) {
4736     const char* old_p = p;
4737     jchar ch = *p;
4738     if (ch < 128) {
4739       p++;
4740       // quick check for ascii
4741       if ((ch >= 'a' && ch <= 'z') ||
4742         (ch >= 'A' && ch <= 'Z') ||
4743         (ch == '_' || ch == '$') ||
4744         (not_first_ch && ch >= '0' && ch <= '9')) {
4745         last_is_slash = false;
4746         continue;
4747       }
4748       if (slash_ok && ch == '/') {
4749         if (last_is_slash) {
4750           return NULL;  // Don't permit consecutive slashes
4751         }
4752         last_is_slash = true;
4753         continue;
4754       }
4755     }
4756     else {
4757       jint unicode_ch;
4758       char* tmp_p = UTF8::next_character(p, &unicode_ch);
4759       p = tmp_p;
4760       last_is_slash = false;
4761       // Check if ch is Java identifier start or is Java identifier part
4762       // 4672820: call java.lang.Character methods directly without generating separate tables.
4763       EXCEPTION_MARK;
4764 
4765       // return value
4766       JavaValue result(T_BOOLEAN);
4767       // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4768       JavaCallArguments args;
4769       args.push_int(unicode_ch);
4770 
4771       // public static boolean isJavaIdentifierStart(char ch);
4772       JavaCalls::call_static(&result,
4773         SystemDictionary::Character_klass(),
4774         vmSymbols::isJavaIdentifierStart_name(),
4775         vmSymbols::int_bool_signature(),
4776         &args,
4777         THREAD);
4778 
4779       if (HAS_PENDING_EXCEPTION) {
4780         CLEAR_PENDING_EXCEPTION;
4781         return 0;
4782       }
4783       if (result.get_jboolean()) {
4784         continue;
4785       }
4786 
4787       if (not_first_ch) {
4788         // public static boolean isJavaIdentifierPart(char ch);
4789         JavaCalls::call_static(&result,
4790           SystemDictionary::Character_klass(),
4791           vmSymbols::isJavaIdentifierPart_name(),
4792           vmSymbols::int_bool_signature(),
4793           &args,
4794           THREAD);
4795 
4796         if (HAS_PENDING_EXCEPTION) {
4797           CLEAR_PENDING_EXCEPTION;
4798           return 0;
4799         }
4800 
4801         if (result.get_jboolean()) {
4802           continue;
4803         }
4804       }
4805     }
4806     return (not_first_ch) ? old_p : NULL;
4807   }
4808   return (not_first_ch) ? p : NULL;
4809 }
4810 
4811 // Take pointer to a string. Skip over the longest part of the string that could
4812 // be taken as a field signature. Allow "void" if void_ok.
4813 // Return a pointer to just past the signature.
4814 // Return NULL if no legal signature is found.
4815 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4816                                                        bool void_ok,
4817                                                        unsigned int length,
4818                                                        TRAPS) const {
4819   unsigned int array_dim = 0;
4820   while (length > 0) {
4821     switch (signature[0]) {
4822     case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4823     case JVM_SIGNATURE_BOOLEAN:
4824     case JVM_SIGNATURE_BYTE:
4825     case JVM_SIGNATURE_CHAR:
4826     case JVM_SIGNATURE_SHORT:
4827     case JVM_SIGNATURE_INT:
4828     case JVM_SIGNATURE_FLOAT:
4829     case JVM_SIGNATURE_LONG:
4830     case JVM_SIGNATURE_DOUBLE:
4831       return signature + 1;
4832     case JVM_SIGNATURE_CLASS: {
4833       if (_major_version < JAVA_1_5_VERSION) {
4834         // Skip over the class name if one is there
4835         const char* const p = skip_over_field_name(signature + 1, true, --length);
4836 
4837         // The next character better be a semicolon
4838         if (p && (p - signature) > 1 && p[0] == ';') {
4839           return p + 1;
4840         }
4841       }
4842       else {
4843         // 4900761: For class version > 48, any unicode is allowed in class name.
4844         length--;
4845         signature++;
4846         while (length > 0 && signature[0] != ';') {
4847           if (signature[0] == '.') {
4848             classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
4849           }
4850           length--;
4851           signature++;
4852         }
4853         if (signature[0] == ';') { return signature + 1; }
4854       }
4855 
4856       return NULL;
4857     }
4858     case JVM_SIGNATURE_ARRAY:
4859       array_dim++;
4860       if (array_dim > 255) {
4861         // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4862         classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4863       }
4864       // The rest of what's there better be a legal signature
4865       signature++;
4866       length--;
4867       void_ok = false;
4868       break;
4869 
4870     default:
4871       return NULL;
4872     }
4873   }
4874   return NULL;
4875 }
4876 
4877 // Checks if name is a legal class name.
4878 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4879   if (!_need_verify || _relax_verify) { return; }
4880 
4881   char buf[fixed_buffer_size];
4882   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4883   unsigned int length = name->utf8_length();
4884   bool legal = false;
4885 
4886   if (length > 0) {
4887     const char* p;
4888     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4889       p = skip_over_field_signature(bytes, false, length, CHECK);
4890       legal = (p != NULL) && ((p - bytes) == (int)length);
4891     } else if (_major_version < JAVA_1_5_VERSION) {
4892       if (bytes[0] != '<') {
4893         p = skip_over_field_name(bytes, true, length);
4894         legal = (p != NULL) && ((p - bytes) == (int)length);
4895       }
4896     } else {
4897       // 4900761: relax the constraints based on JSR202 spec
4898       // Class names may be drawn from the entire Unicode character set.
4899       // Identifiers between '/' must be unqualified names.
4900       // The utf8 string has been verified when parsing cpool entries.
4901       legal = verify_unqualified_name(bytes, length, LegalClass);
4902     }
4903   }
4904   if (!legal) {
4905     ResourceMark rm(THREAD);
4906     assert(_class_name != NULL, "invariant");
4907     Exceptions::fthrow(
4908       THREAD_AND_LOCATION,
4909       vmSymbols::java_lang_ClassFormatError(),
4910       "Illegal class name \"%s\" in class file %s", bytes,
4911       _class_name->as_C_string()
4912     );
4913     return;
4914   }
4915 }
4916 
4917 // Checks if name is a legal field name.
4918 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4919   if (!_need_verify || _relax_verify) { return; }
4920 
4921   char buf[fixed_buffer_size];
4922   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4923   unsigned int length = name->utf8_length();
4924   bool legal = false;
4925 
4926   if (length > 0) {
4927     if (_major_version < JAVA_1_5_VERSION) {
4928       if (bytes[0] != '<') {
4929         const char* p = skip_over_field_name(bytes, false, length);
4930         legal = (p != NULL) && ((p - bytes) == (int)length);
4931       }
4932     } else {
4933       // 4881221: relax the constraints based on JSR202 spec
4934       legal = verify_unqualified_name(bytes, length, LegalField);
4935     }
4936   }
4937 
4938   if (!legal) {
4939     ResourceMark rm(THREAD);
4940     assert(_class_name != NULL, "invariant");
4941     Exceptions::fthrow(
4942       THREAD_AND_LOCATION,
4943       vmSymbols::java_lang_ClassFormatError(),
4944       "Illegal field name \"%s\" in class %s", bytes,
4945       _class_name->as_C_string()
4946     );
4947     return;
4948   }
4949 }
4950 
4951 // Checks if name is a legal method name.
4952 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4953   if (!_need_verify || _relax_verify) { return; }
4954 
4955   assert(name != NULL, "method name is null");
4956   char buf[fixed_buffer_size];
4957   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4958   unsigned int length = name->utf8_length();
4959   bool legal = false;
4960 
4961   if (length > 0) {
4962     if (bytes[0] == '<') {
4963       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4964         legal = true;
4965       }
4966     } else if (_major_version < JAVA_1_5_VERSION) {
4967       const char* p;
4968       p = skip_over_field_name(bytes, false, length);
4969       legal = (p != NULL) && ((p - bytes) == (int)length);
4970     } else {
4971       // 4881221: relax the constraints based on JSR202 spec
4972       legal = verify_unqualified_name(bytes, length, LegalMethod);
4973     }
4974   }
4975 
4976   if (!legal) {
4977     ResourceMark rm(THREAD);
4978     assert(_class_name != NULL, "invariant");
4979     Exceptions::fthrow(
4980       THREAD_AND_LOCATION,
4981       vmSymbols::java_lang_ClassFormatError(),
4982       "Illegal method name \"%s\" in class %s", bytes,
4983       _class_name->as_C_string()
4984     );
4985     return;
4986   }
4987 }
4988 
4989 
4990 // Checks if signature is a legal field signature.
4991 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
4992                                                    const Symbol* signature,
4993                                                    TRAPS) const {
4994   if (!_need_verify) { return; }
4995 
4996   char buf[fixed_buffer_size];
4997   const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4998   const unsigned int length = signature->utf8_length();
4999   const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5000 
5001   if (p == NULL || (p - bytes) != (int)length) {
5002     throwIllegalSignature("Field", name, signature, CHECK);
5003   }
5004 }
5005 
5006 // Checks if signature is a legal method signature.
5007 // Returns number of parameters
5008 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5009                                                    const Symbol* signature,
5010                                                    TRAPS) const {
5011   if (!_need_verify) {
5012     // make sure caller's args_size will be less than 0 even for non-static
5013     // method so it will be recomputed in compute_size_of_parameters().
5014     return -2;
5015   }
5016 
5017   // Class initializers cannot have args for class format version >= 51.
5018   if (name == vmSymbols::class_initializer_name() &&
5019       signature != vmSymbols::void_method_signature() &&
5020       _major_version >= JAVA_7_VERSION) {
5021     throwIllegalSignature("Method", name, signature, CHECK_0);
5022     return 0;
5023   }
5024 
5025   unsigned int args_size = 0;
5026   char buf[fixed_buffer_size];
5027   const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5028   unsigned int length = signature->utf8_length();
5029   const char* nextp;
5030 
5031   // The first character must be a '('
5032   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5033     length--;
5034     // Skip over legal field signatures
5035     nextp = skip_over_field_signature(p, false, length, CHECK_0);
5036     while ((length > 0) && (nextp != NULL)) {
5037       args_size++;
5038       if (p[0] == 'J' || p[0] == 'D') {
5039         args_size++;
5040       }
5041       length -= nextp - p;
5042       p = nextp;
5043       nextp = skip_over_field_signature(p, false, length, CHECK_0);
5044     }
5045     // The first non-signature thing better be a ')'
5046     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5047       length--;
5048       if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5049         // All internal methods must return void
5050         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5051           return args_size;
5052         }
5053       } else {
5054         // Now we better just have a return value
5055         nextp = skip_over_field_signature(p, true, length, CHECK_0);
5056         if (nextp && ((int)length == (nextp - p))) {
5057           return args_size;
5058         }
5059       }
5060     }
5061   }
5062   // Report error
5063   throwIllegalSignature("Method", name, signature, CHECK_0);
5064   return 0;
5065 }
5066 
5067 int ClassFileParser::static_field_size() const {
5068   assert(_field_info != NULL, "invariant");
5069   return _field_info->static_field_size;
5070 }
5071 
5072 int ClassFileParser::total_oop_map_count() const {
5073   assert(_field_info != NULL, "invariant");
5074   return _field_info->total_oop_map_count;
5075 }
5076 
5077 jint ClassFileParser::layout_size() const {
5078   assert(_field_info != NULL, "invariant");
5079   return _field_info->instance_size;
5080 }
5081 
5082 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5083                                          const Array<Method*>* methods) {
5084   assert(ik != NULL, "invariant");
5085   assert(methods != NULL, "invariant");
5086 
5087   // Set up Method*::intrinsic_id as soon as we know the names of methods.
5088   // (We used to do this lazily, but now we query it in Rewriter,
5089   // which is eagerly done for every method, so we might as well do it now,
5090   // when everything is fresh in memory.)
5091   const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5092 
5093   if (klass_id != vmSymbols::NO_SID) {
5094     for (int j = 0; j < methods->length(); ++j) {
5095       Method* method = methods->at(j);
5096       method->init_intrinsic_id();
5097 
5098       if (CheckIntrinsics) {
5099         // Check if an intrinsic is defined for method 'method',
5100         // but the method is not annotated with @HotSpotIntrinsicCandidate.
5101         if (method->intrinsic_id() != vmIntrinsics::_none &&
5102             !method->intrinsic_candidate()) {
5103               tty->print("Compiler intrinsic is defined for method [%s], "
5104               "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5105               method->name_and_sig_as_C_string(),
5106               NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5107             );
5108           tty->cr();
5109           DEBUG_ONLY(vm_exit(1));
5110         }
5111         // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5112         // but there is no intrinsic available for it.
5113         if (method->intrinsic_candidate() &&
5114           method->intrinsic_id() == vmIntrinsics::_none) {
5115             tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5116               "but no compiler intrinsic is defined for the method.%s",
5117               method->name_and_sig_as_C_string(),
5118               NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5119             );
5120           tty->cr();
5121           DEBUG_ONLY(vm_exit(1));
5122         }
5123       }
5124     } // end for
5125 
5126 #ifdef ASSERT
5127     if (CheckIntrinsics) {
5128       // Check for orphan methods in the current class. A method m
5129       // of a class C is orphan if an intrinsic is defined for method m,
5130       // but class C does not declare m.
5131       // The check is potentially expensive, therefore it is available
5132       // only in debug builds.
5133 
5134       for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5135         if (vmIntrinsics::_compiledLambdaForm == id) {
5136           // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5137           // generated for the JVM from a LambdaForm and therefore no method
5138           // is defined for it.
5139           continue;
5140         }
5141 
5142         if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5143           // Check if the current class contains a method with the same
5144           // name, flags, signature.
5145           bool match = false;
5146           for (int j = 0; j < methods->length(); ++j) {
5147             const Method* method = methods->at(j);
5148             if (method->intrinsic_id() == id) {
5149               match = true;
5150               break;
5151             }
5152           }
5153 
5154           if (!match) {
5155             char buf[1000];
5156             tty->print("Compiler intrinsic is defined for method [%s], "
5157                        "but the method is not available in class [%s].%s",
5158                         vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5159                                                              buf, sizeof(buf)),
5160                         ik->name()->as_C_string(),
5161                         NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5162             );
5163             tty->cr();
5164             DEBUG_ONLY(vm_exit(1));
5165           }
5166         }
5167       } // end for
5168     } // CheckIntrinsics
5169 #endif // ASSERT
5170   }
5171 }
5172 
5173 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5174   if (_klass != NULL) {
5175     return _klass;
5176   }
5177 
5178   InstanceKlass* const ik =
5179     InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5180 
5181   fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5182 
5183   assert(_klass == ik, "invariant");
5184 
5185   return ik;
5186 }
5187 
5188 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5189   assert(ik != NULL, "invariant");
5190 
5191   set_klass_to_deallocate(ik);
5192 
5193   assert(_field_info != NULL, "invariant");
5194   assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5195   assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5196     "sanity");
5197 
5198   assert(ik->is_instance_klass(), "sanity");
5199   assert(ik->size_helper() == _field_info->instance_size, "sanity");
5200 
5201   // Fill in information already parsed
5202   ik->set_should_verify_class(_need_verify);
5203 
5204   // Not yet: supers are done below to support the new subtype-checking fields
5205   ik->set_class_loader_data(_loader_data);
5206   ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5207   ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5208   assert(_fac != NULL, "invariant");
5209   ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5210 
5211   // this transfers ownership of a lot of arrays from
5212   // the parser onto the InstanceKlass*
5213   apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5214 
5215   // note that is not safe to use the fields in the parser from this point on
5216   assert(NULL == _cp, "invariant");
5217   assert(NULL == _fields, "invariant");
5218   assert(NULL == _methods, "invariant");
5219   assert(NULL == _inner_classes, "invariant");
5220   assert(NULL == _local_interfaces, "invariant");
5221   assert(NULL == _transitive_interfaces, "invariant");
5222   assert(NULL == _combined_annotations, "invariant");
5223 
5224   if (_has_final_method) {
5225     ik->set_has_final_method();
5226   }
5227 
5228   ik->copy_method_ordering(_method_ordering, CHECK);
5229   // The InstanceKlass::_methods_jmethod_ids cache
5230   // is managed on the assumption that the initial cache
5231   // size is equal to the number of methods in the class. If
5232   // that changes, then InstanceKlass::idnum_can_increment()
5233   // has to be changed accordingly.
5234   ik->set_initial_method_idnum(ik->methods()->length());
5235 
5236   ik->set_name(_class_name);
5237 
5238   if (is_anonymous()) {
5239     // I am well known to myself
5240     ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5241   }
5242 
5243   ik->set_minor_version(_minor_version);
5244   ik->set_major_version(_major_version);
5245   ik->set_has_default_methods(_has_default_methods);
5246   ik->set_declares_default_methods(_declares_default_methods);
5247 
5248   if (_host_klass != NULL) {
5249     assert (ik->is_anonymous(), "should be the same");
5250     ik->set_host_klass(_host_klass);
5251   }
5252 
5253   // Set PackageEntry for this_klass
5254   oop cl = ik->class_loader();
5255   Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5256   ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5257   ik->set_package(cld, CHECK);
5258 
5259   const Array<Method*>* const methods = ik->methods();
5260   assert(methods != NULL, "invariant");
5261   const int methods_len = methods->length();
5262 
5263   check_methods_for_intrinsics(ik, methods);
5264 
5265   // Fill in field values obtained by parse_classfile_attributes
5266   if (_parsed_annotations->has_any_annotations()) {
5267     _parsed_annotations->apply_to(ik);
5268   }
5269 
5270   apply_parsed_class_attributes(ik);
5271 
5272   // Miranda methods
5273   if ((_num_miranda_methods > 0) ||
5274       // if this class introduced new miranda methods or
5275       (_super_klass != NULL && _super_klass->has_miranda_methods())
5276         // super class exists and this class inherited miranda methods
5277      ) {
5278        ik->set_has_miranda_methods(); // then set a flag
5279   }
5280 
5281   // Fill in information needed to compute superclasses.
5282   ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5283 
5284   // Initialize itable offset tables
5285   klassItable::setup_itable_offset_table(ik);
5286 
5287   // Compute transitive closure of interfaces this class implements
5288   // Do final class setup
5289   fill_oop_maps(ik,
5290                 _field_info->nonstatic_oop_map_count,
5291                 _field_info->nonstatic_oop_offsets,
5292                 _field_info->nonstatic_oop_counts);
5293 
5294   // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5295   set_precomputed_flags(ik);
5296 
5297   // check if this class can access its super class
5298   check_super_class_access(ik, CHECK);
5299 
5300   // check if this class can access its superinterfaces
5301   check_super_interface_access(ik, CHECK);
5302 
5303   // check if this class overrides any final method
5304   check_final_method_override(ik, CHECK);
5305 
5306   // check that if this class is an interface then it doesn't have static methods
5307   if (ik->is_interface()) {
5308     /* An interface in a JAVA 8 classfile can be static */
5309     if (_major_version < JAVA_8_VERSION) {
5310       check_illegal_static_method(ik, CHECK);
5311     }
5312   }
5313 
5314   // Obtain this_klass' module entry
5315   ModuleEntry* module_entry = ik->module();
5316   assert(module_entry != NULL, "module_entry should always be set");
5317 
5318   // Obtain java.lang.reflect.Module
5319   Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5320 
5321   // Allocate mirror and initialize static fields
5322   // The create_mirror() call will also call compute_modifiers()
5323   java_lang_Class::create_mirror(ik,
5324                                  _loader_data->class_loader(),
5325                                  module_handle,
5326                                  _protection_domain,
5327                                  CHECK);
5328 
5329   assert(_all_mirandas != NULL, "invariant");
5330 
5331   // Generate any default methods - default methods are interface methods
5332   // that have a default implementation.  This is new with Lambda project.
5333   if (_has_default_methods ) {
5334     DefaultMethods::generate_default_methods(ik,
5335                                              _all_mirandas,
5336                                              CHECK);
5337   }
5338 
5339   // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5340   if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5341       !module_entry->has_default_read_edges()) {
5342     if (!module_entry->set_has_default_read_edges()) {
5343       // We won a potential race
5344       JvmtiExport::add_default_read_edges(module_handle, THREAD);
5345     }
5346   }
5347 
5348   // Update the loader_data graph.
5349   record_defined_class_dependencies(ik, CHECK);
5350 
5351   ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5352 
5353   if (!is_internal()) {
5354     if (log_is_enabled(Info, classload)) {
5355       ResourceMark rm;
5356       const char* module_name = NULL;
5357       static const size_t modules_image_name_len = strlen(MODULES_IMAGE_NAME);
5358       size_t stream_len = strlen(_stream->source());
5359       // See if _stream->source() ends in "modules"
5360       if (module_entry->is_named() && modules_image_name_len < stream_len &&
5361         (strncmp(_stream->source() + stream_len - modules_image_name_len,
5362                  MODULES_IMAGE_NAME, modules_image_name_len) == 0)) {
5363         module_name = module_entry->name()->as_C_string();
5364       }
5365 
5366       if (log_is_enabled(Info, classload)) {
5367         ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream);
5368       }
5369       // No 'else' here as logging levels are not mutually exclusive
5370       if (log_is_enabled(Debug, classload)) {
5371         ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream);
5372       }
5373     }
5374 
5375     if (log_is_enabled(Debug, classresolve))  {
5376       ResourceMark rm;
5377       // print out the superclass.
5378       const char * from = ik->external_name();
5379       if (ik->java_super() != NULL) {
5380         log_debug(classresolve)("%s %s (super)",
5381                    from,
5382                    ik->java_super()->external_name());
5383       }
5384       // print out each of the interface classes referred to by this class.
5385       const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5386       if (local_interfaces != NULL) {
5387         const int length = local_interfaces->length();
5388         for (int i = 0; i < length; i++) {
5389           const Klass* const k = local_interfaces->at(i);
5390           const char * to = k->external_name();
5391           log_debug(classresolve)("%s %s (interface)", from, to);
5392         }
5393       }
5394     }
5395   }
5396 
5397   TRACE_INIT_KLASS_ID(ik);
5398 
5399   // If we reach here, all is well.
5400   // Now remove the InstanceKlass* from the _klass_to_deallocate field
5401   // in order for it to not be destroyed in the ClassFileParser destructor.
5402   set_klass_to_deallocate(NULL);
5403 
5404   // it's official
5405   set_klass(ik);
5406 
5407   debug_only(ik->verify();)
5408 }
5409 
5410 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5411                                  Symbol* name,
5412                                  ClassLoaderData* loader_data,
5413                                  Handle protection_domain,
5414                                  TempNewSymbol* parsed_name,
5415                                  const Klass* host_klass,
5416                                  GrowableArray<Handle>* cp_patches,
5417                                  Publicity pub_level,
5418                                  TRAPS) :
5419   _stream(stream),
5420   _requested_name(name),
5421   _loader_data(loader_data),
5422   _host_klass(host_klass),
5423   _cp_patches(cp_patches),
5424   _parsed_name(parsed_name),
5425   _super_klass(),
5426   _cp(NULL),
5427   _fields(NULL),
5428   _methods(NULL),
5429   _inner_classes(NULL),
5430   _local_interfaces(NULL),
5431   _transitive_interfaces(NULL),
5432   _combined_annotations(NULL),
5433   _annotations(NULL),
5434   _type_annotations(NULL),
5435   _fields_annotations(NULL),
5436   _fields_type_annotations(NULL),
5437   _klass(NULL),
5438   _klass_to_deallocate(NULL),
5439   _parsed_annotations(NULL),
5440   _fac(NULL),
5441   _field_info(NULL),
5442   _method_ordering(NULL),
5443   _all_mirandas(NULL),
5444   _vtable_size(0),
5445   _itable_size(0),
5446   _num_miranda_methods(0),
5447   _rt(REF_NONE),
5448   _protection_domain(protection_domain),
5449   _access_flags(),
5450   _pub_level(pub_level),
5451   _synthetic_flag(false),
5452   _sde_length(false),
5453   _sde_buffer(NULL),
5454   _sourcefile_index(0),
5455   _generic_signature_index(0),
5456   _major_version(0),
5457   _minor_version(0),
5458   _this_class_index(0),
5459   _super_class_index(0),
5460   _itfs_len(0),
5461   _java_fields_count(0),
5462   _need_verify(false),
5463   _relax_verify(false),
5464   _has_default_methods(false),
5465   _declares_default_methods(false),
5466   _has_final_method(false),
5467   _has_finalizer(false),
5468   _has_empty_finalizer(false),
5469   _has_vanilla_constructor(false),
5470   _max_bootstrap_specifier_index(-1) {
5471 
5472   _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5473 
5474   assert(THREAD->is_Java_thread(), "invariant");
5475   assert(_loader_data != NULL, "invariant");
5476   assert(stream != NULL, "invariant");
5477   assert(_stream != NULL, "invariant");
5478   assert(_stream->buffer() == _stream->current(), "invariant");
5479   assert(_class_name != NULL, "invariant");
5480   assert(0 == _access_flags.as_int(), "invariant");
5481 
5482   // Figure out whether we can skip format checking (matching classic VM behavior)
5483   if (DumpSharedSpaces) {
5484     // verify == true means it's a 'remote' class (i.e., non-boot class)
5485     // Verification decision is based on BytecodeVerificationRemote flag
5486     // for those classes.
5487     _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5488                                               BytecodeVerificationLocal;
5489   }
5490   else {
5491     _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5492                                                stream->need_verify());
5493   }
5494 
5495   // synch back verification state to stream
5496   stream->set_verify(_need_verify);
5497 
5498   // Check if verification needs to be relaxed for this class file
5499   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5500   _relax_verify = Verifier::relax_verify_for(_loader_data->class_loader());
5501 
5502   parse_stream(stream, CHECK);
5503 
5504   post_process_parsed_stream(stream, _cp, CHECK);
5505 }
5506 
5507 void ClassFileParser::clear_class_metadata() {
5508   // metadata created before the instance klass is created.  Must be
5509   // deallocated if classfile parsing returns an error.
5510   _cp = NULL;
5511   _fields = NULL;
5512   _methods = NULL;
5513   _inner_classes = NULL;
5514   _local_interfaces = NULL;
5515   _transitive_interfaces = NULL;
5516   _combined_annotations = NULL;
5517   _annotations = _type_annotations = NULL;
5518   _fields_annotations = _fields_type_annotations = NULL;
5519 }
5520 
5521 // Destructor to clean up
5522 ClassFileParser::~ClassFileParser() {
5523   if (_cp != NULL) {
5524     MetadataFactory::free_metadata(_loader_data, _cp);
5525   }
5526   if (_fields != NULL) {
5527     MetadataFactory::free_array<u2>(_loader_data, _fields);
5528   }
5529 
5530   if (_methods != NULL) {
5531     // Free methods
5532     InstanceKlass::deallocate_methods(_loader_data, _methods);
5533   }
5534 
5535   // beware of the Universe::empty_blah_array!!
5536   if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5537     MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5538   }
5539 
5540   // Free interfaces
5541   InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5542                                        _local_interfaces, _transitive_interfaces);
5543 
5544   if (_combined_annotations != NULL) {
5545     // After all annotations arrays have been created, they are installed into the
5546     // Annotations object that will be assigned to the InstanceKlass being created.
5547 
5548     // Deallocate the Annotations object and the installed annotations arrays.
5549     _combined_annotations->deallocate_contents(_loader_data);
5550 
5551     // If the _combined_annotations pointer is non-NULL,
5552     // then the other annotations fields should have been cleared.
5553     assert(_annotations             == NULL, "Should have been cleared");
5554     assert(_type_annotations        == NULL, "Should have been cleared");
5555     assert(_fields_annotations      == NULL, "Should have been cleared");
5556     assert(_fields_type_annotations == NULL, "Should have been cleared");
5557   } else {
5558     // If the annotations arrays were not installed into the Annotations object,
5559     // then they have to be deallocated explicitly.
5560     MetadataFactory::free_array<u1>(_loader_data, _annotations);
5561     MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5562     Annotations::free_contents(_loader_data, _fields_annotations);
5563     Annotations::free_contents(_loader_data, _fields_type_annotations);
5564   }
5565 
5566   clear_class_metadata();
5567 
5568   // deallocate the klass if already created.  Don't directly deallocate, but add
5569   // to the deallocate list so that the klass is removed from the CLD::_klasses list
5570   // at a safepoint.
5571   if (_klass_to_deallocate != NULL) {
5572     _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5573   }
5574 }
5575 
5576 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5577                                    TRAPS) {
5578 
5579   assert(stream != NULL, "invariant");
5580   assert(_class_name != NULL, "invariant");
5581 
5582   // BEGIN STREAM PARSING
5583   stream->guarantee_more(8, CHECK);  // magic, major, minor
5584   // Magic value
5585   const u4 magic = stream->get_u4_fast();
5586   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5587                      "Incompatible magic value %u in class file %s",
5588                      magic, CHECK);
5589 
5590   // Version numbers
5591   _minor_version = stream->get_u2_fast();
5592   _major_version = stream->get_u2_fast();
5593 
5594   if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5595     ResourceMark rm;
5596     warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5597             _major_version,  _minor_version, _class_name->as_C_string());
5598     Exceptions::fthrow(
5599       THREAD_AND_LOCATION,
5600       vmSymbols::java_lang_UnsupportedClassVersionError(),
5601       "Unsupported major.minor version for dump time %u.%u",
5602       _major_version,
5603       _minor_version);
5604   }
5605 
5606   // Check version numbers - we check this even with verifier off
5607   if (!is_supported_version(_major_version, _minor_version)) {
5608     ResourceMark rm(THREAD);
5609     Exceptions::fthrow(
5610       THREAD_AND_LOCATION,
5611       vmSymbols::java_lang_UnsupportedClassVersionError(),
5612       "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5613       "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5614       _class_name->as_C_string(),
5615       _major_version,
5616       _minor_version,
5617       JAVA_MAX_SUPPORTED_VERSION,
5618       JAVA_MAX_SUPPORTED_MINOR_VERSION);
5619     return;
5620   }
5621 
5622   stream->guarantee_more(3, CHECK); // length, first cp tag
5623   const u2 cp_size = stream->get_u2_fast();
5624 
5625   guarantee_property(
5626     cp_size >= 1, "Illegal constant pool size %u in class file %s",
5627     cp_size, CHECK);
5628 
5629   _cp = ConstantPool::allocate(_loader_data,
5630                                cp_size,
5631                                CHECK);
5632 
5633   ConstantPool* const cp = _cp;
5634 
5635   parse_constant_pool(stream, cp, cp_size, CHECK);
5636 
5637   assert(cp_size == (const u2)cp->length(), "invariant");
5638 
5639   // ACCESS FLAGS
5640   stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
5641 
5642   // Access flags
5643   jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5644 
5645   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5646     // Set abstract bit for old class files for backward compatibility
5647     flags |= JVM_ACC_ABSTRACT;
5648   }
5649 
5650   _access_flags.set_flags(flags);
5651 
5652   verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK);
5653 
5654   // This class and superclass
5655   _this_class_index = stream->get_u2_fast();
5656   check_property(
5657     valid_cp_range(_this_class_index, cp_size) &&
5658       cp->tag_at(_this_class_index).is_unresolved_klass(),
5659     "Invalid this class index %u in constant pool in class file %s",
5660     _this_class_index, CHECK);
5661 
5662   Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5663   assert(class_name_in_cp != NULL, "class_name can't be null");
5664 
5665   if (_parsed_name != NULL) {
5666     // It's important to set parsed_name *before* resolving the super class.
5667     // (it's used for cleanup by the caller if parsing fails)
5668     *_parsed_name = class_name_in_cp;
5669     // parsed_name is returned and can be used if there's an error, so add to
5670     // its reference count.  Caller will decrement the refcount.
5671     (*_parsed_name)->increment_refcount();
5672   }
5673 
5674   // Update _class_name which could be null previously
5675   // to reflect the name in the constant pool
5676   _class_name = class_name_in_cp;
5677 
5678   // Don't need to check whether this class name is legal or not.
5679   // It has been checked when constant pool is parsed.
5680   // However, make sure it is not an array type.
5681   if (_need_verify) {
5682     guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5683                        "Bad class name in class file %s",
5684                        CHECK);
5685   }
5686 
5687   // Checks if name in class file matches requested name
5688   if (_requested_name != NULL && _requested_name != _class_name) {
5689     ResourceMark rm(THREAD);
5690     Exceptions::fthrow(
5691       THREAD_AND_LOCATION,
5692       vmSymbols::java_lang_NoClassDefFoundError(),
5693       "%s (wrong name: %s)",
5694       _class_name->as_C_string(),
5695       _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5696     );
5697     return;
5698   }
5699 
5700   if (!is_internal()) {
5701     if (log_is_enabled(Debug, classload, preorder)){
5702       ResourceMark rm(THREAD);
5703       outputStream* log = Log(classload, preorder)::debug_stream();
5704       log->print("%s", _class_name->as_klass_external_name());
5705       if (stream->source() != NULL) {
5706         log->print(" source: %s", stream->source());
5707       }
5708       log->cr();
5709     }
5710 
5711 #if INCLUDE_CDS
5712     if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5713       // Only dump the classes that can be stored into CDS archive
5714       if (SystemDictionaryShared::is_sharing_possible(_loader_data)) {
5715         ResourceMark rm(THREAD);
5716         classlist_file->print_cr("%s", _class_name->as_C_string());
5717         classlist_file->flush();
5718       }
5719     }
5720 #endif
5721   }
5722 
5723   // SUPERKLASS
5724   _super_class_index = stream->get_u2_fast();
5725   _super_klass = parse_super_class(cp,
5726                                    _super_class_index,
5727                                    _need_verify,
5728                                    CHECK);
5729 
5730   // Interfaces
5731   _itfs_len = stream->get_u2_fast();
5732   parse_interfaces(stream,
5733                    _itfs_len,
5734                    cp,
5735                    &_has_default_methods,
5736                    CHECK);
5737 
5738   assert(_local_interfaces != NULL, "invariant");
5739 
5740   // Fields (offsets are filled in later)
5741   _fac = new FieldAllocationCount();
5742   parse_fields(stream,
5743                _access_flags.is_interface(),
5744                _fac,
5745                cp,
5746                cp_size,
5747                &_java_fields_count,
5748                CHECK);
5749 
5750   assert(_fields != NULL, "invariant");
5751 
5752   // Methods
5753   AccessFlags promoted_flags;
5754   parse_methods(stream,
5755                 _access_flags.is_interface(),
5756                 &promoted_flags,
5757                 &_has_final_method,
5758                 &_declares_default_methods,
5759                 CHECK);
5760 
5761   assert(_methods != NULL, "invariant");
5762 
5763   // promote flags from parse_methods() to the klass' flags
5764   _access_flags.add_promoted_flags(promoted_flags.as_int());
5765 
5766   if (_declares_default_methods) {
5767     _has_default_methods = true;
5768   }
5769 
5770   // Additional attributes/annotations
5771   _parsed_annotations = new ClassAnnotationCollector();
5772   parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5773 
5774   assert(_inner_classes != NULL, "invariant");
5775 
5776   // Finalize the Annotations metadata object,
5777   // now that all annotation arrays have been created.
5778   create_combined_annotations(CHECK);
5779 
5780   // Make sure this is the end of class file stream
5781   guarantee_property(stream->at_eos(),
5782                      "Extra bytes at the end of class file %s",
5783                      CHECK);
5784 
5785   // all bytes in stream read and parsed
5786 }
5787 
5788 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5789                                                  ConstantPool* cp,
5790                                                  TRAPS) {
5791   assert(stream != NULL, "invariant");
5792   assert(stream->at_eos(), "invariant");
5793   assert(cp != NULL, "invariant");
5794   assert(_loader_data != NULL, "invariant");
5795 
5796   // We check super class after class file is parsed and format is checked
5797   if (_super_class_index > 0 && NULL ==_super_klass) {
5798     Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5799     if (_access_flags.is_interface()) {
5800       // Before attempting to resolve the superclass, check for class format
5801       // errors not checked yet.
5802       guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5803         "Interfaces must have java.lang.Object as superclass in class file %s",
5804         CHECK);
5805       }
5806       _super_klass = (const InstanceKlass*)
5807                        SystemDictionary::resolve_super_or_fail(_class_name,
5808                                                                super_class_name,
5809                                                                _loader_data->class_loader(),
5810                                                                _protection_domain,
5811                                                                true,
5812                                                                CHECK);
5813   }
5814 
5815   if (_super_klass != NULL) {
5816     if (_super_klass->has_default_methods()) {
5817       _has_default_methods = true;
5818     }
5819 
5820     if (_super_klass->is_interface()) {
5821       ResourceMark rm(THREAD);
5822       Exceptions::fthrow(
5823         THREAD_AND_LOCATION,
5824         vmSymbols::java_lang_IncompatibleClassChangeError(),
5825         "class %s has interface %s as super class",
5826         _class_name->as_klass_external_name(),
5827         _super_klass->external_name()
5828       );
5829       return;
5830     }
5831     // Make sure super class is not final
5832     if (_super_klass->is_final()) {
5833       THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5834     }
5835   }
5836 
5837   // Compute the transitive list of all unique interfaces implemented by this class
5838   _transitive_interfaces =
5839     compute_transitive_interfaces(_super_klass,
5840                                   _local_interfaces,
5841                                   _loader_data,
5842                                   CHECK);
5843 
5844   assert(_transitive_interfaces != NULL, "invariant");
5845 
5846   // sort methods
5847   _method_ordering = sort_methods(_methods);
5848 
5849   _all_mirandas = new GrowableArray<Method*>(20);
5850 
5851   klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5852                                                     &_num_miranda_methods,
5853                                                     _all_mirandas,
5854                                                     _super_klass,
5855                                                     _methods,
5856                                                     _access_flags,
5857                                                     _loader_data->class_loader(),
5858                                                     _class_name,
5859                                                     _local_interfaces,
5860                                                     CHECK);
5861 
5862   // Size of Java itable (in words)
5863   _itable_size = _access_flags.is_interface() ? 0 :
5864     klassItable::compute_itable_size(_transitive_interfaces);
5865 
5866   assert(_fac != NULL, "invariant");
5867   assert(_parsed_annotations != NULL, "invariant");
5868 
5869   _field_info = new FieldLayoutInfo();
5870   layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
5871 
5872   // Compute reference typ
5873   _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
5874 
5875 }
5876 
5877 void ClassFileParser::set_klass(InstanceKlass* klass) {
5878 
5879 #ifdef ASSERT
5880   if (klass != NULL) {
5881     assert(NULL == _klass, "leaking?");
5882   }
5883 #endif
5884 
5885   _klass = klass;
5886 }
5887 
5888 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
5889 
5890 #ifdef ASSERT
5891   if (klass != NULL) {
5892     assert(NULL == _klass_to_deallocate, "leaking?");
5893   }
5894 #endif
5895 
5896   _klass_to_deallocate = klass;
5897 }
5898 
5899 // Caller responsible for ResourceMark
5900 // clone stream with rewound position
5901 const ClassFileStream* ClassFileParser::clone_stream() const {
5902   assert(_stream != NULL, "invariant");
5903 
5904   return _stream->clone();
5905 }