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 "aot/aotLoader.hpp"
  26 #include "classfile/classFileParser.hpp"
  27 #include "classfile/classFileStream.hpp"
  28 #include "classfile/classLoader.hpp"
  29 #include "classfile/classLoaderData.inline.hpp"
  30 #include "classfile/defaultMethods.hpp"
  31 #include "classfile/dictionary.hpp"
  32 #include "classfile/javaClasses.inline.hpp"
  33 #include "classfile/moduleEntry.hpp"
  34 #include "classfile/symbolTable.hpp"
  35 #include "classfile/systemDictionary.hpp"
  36 #include "classfile/verificationType.hpp"
  37 #include "classfile/verifier.hpp"
  38 #include "classfile/vmSymbols.hpp"
  39 #include "gc/shared/gcLocker.hpp"
  40 #include "logging/log.hpp"
  41 #include "memory/allocation.hpp"
  42 #include "memory/metadataFactory.hpp"
  43 #include "memory/oopFactory.hpp"
  44 #include "memory/resourceArea.hpp"
  45 #include "memory/universe.inline.hpp"
  46 #include "oops/annotations.hpp"
  47 #include "oops/fieldStreams.hpp"
  48 #include "oops/instanceKlass.hpp"
  49 #include "oops/instanceMirrorKlass.hpp"
  50 #include "oops/klass.inline.hpp"
  51 #include "oops/klassVtable.hpp"
  52 #include "oops/metadata.hpp"
  53 #include "oops/method.hpp"
  54 #include "oops/oop.inline.hpp"
  55 #include "oops/symbol.hpp"
  56 #include "prims/jvm.h"
  57 #include "prims/jvmtiExport.hpp"
  58 #include "prims/jvmtiThreadState.hpp"
  59 #include "runtime/javaCalls.hpp"
  60 #include "runtime/perfData.hpp"
  61 #include "runtime/reflection.hpp"
  62 #include "runtime/signature.hpp"
  63 #include "runtime/timer.hpp"
  64 #include "services/classLoadingService.hpp"
  65 #include "services/threadService.hpp"
  66 #include "trace/traceMacros.hpp"
  67 #include "utilities/array.hpp"
  68 #include "utilities/exceptions.hpp"
  69 #include "utilities/globalDefinitions.hpp"
  70 #include "utilities/macros.hpp"
  71 #include "utilities/ostream.hpp"
  72 #include "utilities/resourceHash.hpp"
  73 #if INCLUDE_CDS
  74 #include "classfile/systemDictionaryShared.hpp"
  75 #endif
  76 
  77 // We generally try to create the oops directly when parsing, rather than
  78 // allocating temporary data structures and copying the bytes twice. A
  79 // temporary area is only needed when parsing utf8 entries in the constant
  80 // pool and when parsing line number tables.
  81 
  82 // We add assert in debug mode when class format is not checked.
  83 
  84 #define JAVA_CLASSFILE_MAGIC              0xCAFEBABE
  85 #define JAVA_MIN_SUPPORTED_VERSION        45
  86 #define JAVA_MAX_SUPPORTED_VERSION        53
  87 #define JAVA_MAX_SUPPORTED_MINOR_VERSION  0
  88 
  89 // Used for two backward compatibility reasons:
  90 // - to check for new additions to the class file format in JDK1.5
  91 // - to check for bug fixes in the format checker in JDK1.5
  92 #define JAVA_1_5_VERSION                  49
  93 
  94 // Used for backward compatibility reasons:
  95 // - to check for javac bug fixes that happened after 1.5
  96 // - also used as the max version when running in jdk6
  97 #define JAVA_6_VERSION                    50
  98 
  99 // Used for backward compatibility reasons:
 100 // - to disallow argument and require ACC_STATIC for <clinit> methods
 101 #define JAVA_7_VERSION                    51
 102 
 103 // Extension method support.
 104 #define JAVA_8_VERSION                    52
 105 
 106 #define JAVA_9_VERSION                    53
 107 
 108 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
 109                                                   ConstantPool* cp,
 110                                                   const int length,
 111                                                   TRAPS) {
 112   assert(stream != NULL, "invariant");
 113   assert(cp != NULL, "invariant");
 114 
 115   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
 116   // this function (_current can be allocated in a register, with scalar
 117   // replacement of aggregates). The _current pointer is copied back to
 118   // stream() when this function returns. DON'T call another method within
 119   // this method that uses stream().
 120   const ClassFileStream cfs1 = *stream;
 121   const ClassFileStream* const cfs = &cfs1;
 122 
 123   assert(cfs->allocated_on_stack(), "should be local");
 124   debug_only(const u1* const old_current = stream->current();)
 125 
 126   // Used for batching symbol allocations.
 127   const char* names[SymbolTable::symbol_alloc_batch_size];
 128   int lengths[SymbolTable::symbol_alloc_batch_size];
 129   int indices[SymbolTable::symbol_alloc_batch_size];
 130   unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
 131   int names_count = 0;
 132 
 133   // parsing  Index 0 is unused
 134   for (int index = 1; index < length; index++) {
 135     // Each of the following case guarantees one more byte in the stream
 136     // for the following tag or the access_flags following constant pool,
 137     // so we don't need bounds-check for reading tag.
 138     const u1 tag = cfs->get_u1_fast();
 139     switch (tag) {
 140       case JVM_CONSTANT_Class : {
 141         cfs->guarantee_more(3, CHECK);  // name_index, tag/access_flags
 142         const u2 name_index = cfs->get_u2_fast();
 143         cp->klass_index_at_put(index, name_index);
 144         break;
 145       }
 146       case JVM_CONSTANT_Fieldref: {
 147         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 148         const u2 class_index = cfs->get_u2_fast();
 149         const u2 name_and_type_index = cfs->get_u2_fast();
 150         cp->field_at_put(index, class_index, name_and_type_index);
 151         break;
 152       }
 153       case JVM_CONSTANT_Methodref: {
 154         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 155         const u2 class_index = cfs->get_u2_fast();
 156         const u2 name_and_type_index = cfs->get_u2_fast();
 157         cp->method_at_put(index, class_index, name_and_type_index);
 158         break;
 159       }
 160       case JVM_CONSTANT_InterfaceMethodref: {
 161         cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
 162         const u2 class_index = cfs->get_u2_fast();
 163         const u2 name_and_type_index = cfs->get_u2_fast();
 164         cp->interface_method_at_put(index, class_index, name_and_type_index);
 165         break;
 166       }
 167       case JVM_CONSTANT_String : {
 168         cfs->guarantee_more(3, CHECK);  // string_index, tag/access_flags
 169         const u2 string_index = cfs->get_u2_fast();
 170         cp->string_index_at_put(index, string_index);
 171         break;
 172       }
 173       case JVM_CONSTANT_MethodHandle :
 174       case JVM_CONSTANT_MethodType: {
 175         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 176           classfile_parse_error(
 177             "Class file version does not support constant tag %u in class file %s",
 178             tag, CHECK);
 179         }
 180         if (tag == JVM_CONSTANT_MethodHandle) {
 181           cfs->guarantee_more(4, CHECK);  // ref_kind, method_index, tag/access_flags
 182           const u1 ref_kind = cfs->get_u1_fast();
 183           const u2 method_index = cfs->get_u2_fast();
 184           cp->method_handle_index_at_put(index, ref_kind, method_index);
 185         }
 186         else if (tag == JVM_CONSTANT_MethodType) {
 187           cfs->guarantee_more(3, CHECK);  // signature_index, tag/access_flags
 188           const u2 signature_index = cfs->get_u2_fast();
 189           cp->method_type_index_at_put(index, signature_index);
 190         }
 191         else {
 192           ShouldNotReachHere();
 193         }
 194         break;
 195       }
 196       case JVM_CONSTANT_InvokeDynamic : {
 197         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
 198           classfile_parse_error(
 199               "Class file version does not support constant tag %u in class file %s",
 200               tag, CHECK);
 201         }
 202         cfs->guarantee_more(5, CHECK);  // bsm_index, nt, tag/access_flags
 203         const u2 bootstrap_specifier_index = cfs->get_u2_fast();
 204         const u2 name_and_type_index = cfs->get_u2_fast();
 205         if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) {
 206           _max_bootstrap_specifier_index = (int) bootstrap_specifier_index;  // collect for later
 207         }
 208         cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
 209         break;
 210       }
 211       case JVM_CONSTANT_Integer: {
 212         cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 213         const u4 bytes = cfs->get_u4_fast();
 214         cp->int_at_put(index, (jint)bytes);
 215         break;
 216       }
 217       case JVM_CONSTANT_Float: {
 218         cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
 219         const u4 bytes = cfs->get_u4_fast();
 220         cp->float_at_put(index, *(jfloat*)&bytes);
 221         break;
 222       }
 223       case JVM_CONSTANT_Long: {
 224         // A mangled type might cause you to overrun allocated memory
 225         guarantee_property(index + 1 < length,
 226                            "Invalid constant pool entry %u in class file %s",
 227                            index,
 228                            CHECK);
 229         cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 230         const u8 bytes = cfs->get_u8_fast();
 231         cp->long_at_put(index, bytes);
 232         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 233         break;
 234       }
 235       case JVM_CONSTANT_Double: {
 236         // A mangled type might cause you to overrun allocated memory
 237         guarantee_property(index+1 < length,
 238                            "Invalid constant pool entry %u in class file %s",
 239                            index,
 240                            CHECK);
 241         cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
 242         const u8 bytes = cfs->get_u8_fast();
 243         cp->double_at_put(index, *(jdouble*)&bytes);
 244         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
 245         break;
 246       }
 247       case JVM_CONSTANT_NameAndType: {
 248         cfs->guarantee_more(5, CHECK);  // name_index, signature_index, tag/access_flags
 249         const u2 name_index = cfs->get_u2_fast();
 250         const u2 signature_index = cfs->get_u2_fast();
 251         cp->name_and_type_at_put(index, name_index, signature_index);
 252         break;
 253       }
 254       case JVM_CONSTANT_Utf8 : {
 255         cfs->guarantee_more(2, CHECK);  // utf8_length
 256         u2  utf8_length = cfs->get_u2_fast();
 257         const u1* utf8_buffer = cfs->get_u1_buffer();
 258         assert(utf8_buffer != NULL, "null utf8 buffer");
 259         // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
 260         cfs->guarantee_more(utf8_length+1, CHECK);  // utf8 string, tag/access_flags
 261         cfs->skip_u1_fast(utf8_length);
 262 
 263         // Before storing the symbol, make sure it's legal
 264         if (_need_verify) {
 265           verify_legal_utf8(utf8_buffer, utf8_length, CHECK);
 266         }
 267 
 268         if (has_cp_patch_at(index)) {
 269           Handle patch = clear_cp_patch_at(index);
 270           guarantee_property(java_lang_String::is_instance(patch()),
 271                              "Illegal utf8 patch at %d in class file %s",
 272                              index,
 273                              CHECK);
 274           const char* const str = java_lang_String::as_utf8_string(patch());
 275           // (could use java_lang_String::as_symbol instead, but might as well batch them)
 276           utf8_buffer = (const u1*) str;
 277           utf8_length = (int) strlen(str);
 278         }
 279 
 280         unsigned int hash;
 281         Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
 282                                                         utf8_length,
 283                                                         hash);
 284         if (result == NULL) {
 285           names[names_count] = (const char*)utf8_buffer;
 286           lengths[names_count] = utf8_length;
 287           indices[names_count] = index;
 288           hashValues[names_count++] = hash;
 289           if (names_count == SymbolTable::symbol_alloc_batch_size) {
 290             SymbolTable::new_symbols(_loader_data,
 291                                      cp,
 292                                      names_count,
 293                                      names,
 294                                      lengths,
 295                                      indices,
 296                                      hashValues,
 297                                      CHECK);
 298             names_count = 0;
 299           }
 300         } else {
 301           cp->symbol_at_put(index, result);
 302         }
 303         break;
 304       }
 305       default: {
 306         classfile_parse_error("Unknown constant tag %u in class file %s",
 307                               tag,
 308                               CHECK);
 309         break;
 310       }
 311     } // end of switch(tag)
 312   } // end of for
 313 
 314   // Allocate the remaining symbols
 315   if (names_count > 0) {
 316     SymbolTable::new_symbols(_loader_data,
 317                              cp,
 318                              names_count,
 319                              names,
 320                              lengths,
 321                              indices,
 322                              hashValues,
 323                              CHECK);
 324   }
 325 
 326   // Copy _current pointer of local copy back to stream.
 327   assert(stream->current() == old_current, "non-exclusive use of stream");
 328   stream->set_current(cfs1.current());
 329 
 330 }
 331 
 332 static inline bool valid_cp_range(int index, int length) {
 333   return (index > 0 && index < length);
 334 }
 335 
 336 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
 337   assert(cp != NULL, "invariant");
 338   if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
 339     return cp->symbol_at(index);
 340   }
 341   return NULL;
 342 }
 343 
 344 #ifdef ASSERT
 345 PRAGMA_DIAG_PUSH
 346 PRAGMA_FORMAT_NONLITERAL_IGNORED
 347 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
 348   ResourceMark rm(THREAD);
 349   fatal(msg, _class_name->as_C_string());
 350 }
 351 
 352 void ClassFileParser::report_assert_property_failure(const char* msg,
 353                                                      int index,
 354                                                      TRAPS) const {
 355   ResourceMark rm(THREAD);
 356   fatal(msg, index, _class_name->as_C_string());
 357 }
 358 PRAGMA_DIAG_POP
 359 #endif
 360 
 361 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
 362                                           ConstantPool* const cp,
 363                                           const int length,
 364                                           TRAPS) {
 365   assert(cp != NULL, "invariant");
 366   assert(stream != NULL, "invariant");
 367 
 368   // parsing constant pool entries
 369   parse_constant_pool_entries(stream, cp, length, CHECK);
 370 
 371   int index = 1;  // declared outside of loops for portability
 372 
 373   // first verification pass - validate cross references
 374   // and fixup class and string constants
 375   for (index = 1; index < length; index++) {          // Index 0 is unused
 376     const jbyte tag = cp->tag_at(index).value();
 377     switch (tag) {
 378       case JVM_CONSTANT_Class: {
 379         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 380         break;
 381       }
 382       case JVM_CONSTANT_Fieldref:
 383         // fall through
 384       case JVM_CONSTANT_Methodref:
 385         // fall through
 386       case JVM_CONSTANT_InterfaceMethodref: {
 387         if (!_need_verify) break;
 388         const int klass_ref_index = cp->klass_ref_index_at(index);
 389         const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
 390         check_property(valid_klass_reference_at(klass_ref_index),
 391                        "Invalid constant pool index %u in class file %s",
 392                        klass_ref_index, CHECK);
 393         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 394           cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 395           "Invalid constant pool index %u in class file %s",
 396           name_and_type_ref_index, CHECK);
 397         break;
 398       }
 399       case JVM_CONSTANT_String: {
 400         ShouldNotReachHere();     // Only JVM_CONSTANT_StringIndex should be present
 401         break;
 402       }
 403       case JVM_CONSTANT_Integer:
 404         break;
 405       case JVM_CONSTANT_Float:
 406         break;
 407       case JVM_CONSTANT_Long:
 408       case JVM_CONSTANT_Double: {
 409         index++;
 410         check_property(
 411           (index < length && cp->tag_at(index).is_invalid()),
 412           "Improper constant pool long/double index %u in class file %s",
 413           index, CHECK);
 414         break;
 415       }
 416       case JVM_CONSTANT_NameAndType: {
 417         if (!_need_verify) break;
 418         const int name_ref_index = cp->name_ref_index_at(index);
 419         const int signature_ref_index = cp->signature_ref_index_at(index);
 420         check_property(valid_symbol_at(name_ref_index),
 421           "Invalid constant pool index %u in class file %s",
 422           name_ref_index, CHECK);
 423         check_property(valid_symbol_at(signature_ref_index),
 424           "Invalid constant pool index %u in class file %s",
 425           signature_ref_index, CHECK);
 426         break;
 427       }
 428       case JVM_CONSTANT_Utf8:
 429         break;
 430       case JVM_CONSTANT_UnresolvedClass:         // fall-through
 431       case JVM_CONSTANT_UnresolvedClassInError: {
 432         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
 433         break;
 434       }
 435       case JVM_CONSTANT_ClassIndex: {
 436         const int class_index = cp->klass_index_at(index);
 437         check_property(valid_symbol_at(class_index),
 438           "Invalid constant pool index %u in class file %s",
 439           class_index, CHECK);
 440         cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
 441         break;
 442       }
 443       case JVM_CONSTANT_StringIndex: {
 444         const int string_index = cp->string_index_at(index);
 445         check_property(valid_symbol_at(string_index),
 446           "Invalid constant pool index %u in class file %s",
 447           string_index, CHECK);
 448         Symbol* const sym = cp->symbol_at(string_index);
 449         cp->unresolved_string_at_put(index, sym);
 450         break;
 451       }
 452       case JVM_CONSTANT_MethodHandle: {
 453         const int ref_index = cp->method_handle_index_at(index);
 454         check_property(valid_cp_range(ref_index, length),
 455           "Invalid constant pool index %u in class file %s",
 456           ref_index, CHECK);
 457         const constantTag tag = cp->tag_at(ref_index);
 458         const int ref_kind = cp->method_handle_ref_kind_at(index);
 459 
 460         switch (ref_kind) {
 461           case JVM_REF_getField:
 462           case JVM_REF_getStatic:
 463           case JVM_REF_putField:
 464           case JVM_REF_putStatic: {
 465             check_property(
 466               tag.is_field(),
 467               "Invalid constant pool index %u in class file %s (not a field)",
 468               ref_index, CHECK);
 469             break;
 470           }
 471           case JVM_REF_invokeVirtual:
 472           case JVM_REF_newInvokeSpecial: {
 473             check_property(
 474               tag.is_method(),
 475               "Invalid constant pool index %u in class file %s (not a method)",
 476               ref_index, CHECK);
 477             break;
 478           }
 479           case JVM_REF_invokeStatic:
 480           case JVM_REF_invokeSpecial: {
 481             check_property(
 482               tag.is_method() ||
 483               ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
 484               "Invalid constant pool index %u in class file %s (not a method)",
 485               ref_index, CHECK);
 486             break;
 487           }
 488           case JVM_REF_invokeInterface: {
 489             check_property(
 490               tag.is_interface_method(),
 491               "Invalid constant pool index %u in class file %s (not an interface method)",
 492               ref_index, CHECK);
 493             break;
 494           }
 495           default: {
 496             classfile_parse_error(
 497               "Bad method handle kind at constant pool index %u in class file %s",
 498               index, CHECK);
 499           }
 500         } // switch(refkind)
 501         // Keep the ref_index unchanged.  It will be indirected at link-time.
 502         break;
 503       } // case MethodHandle
 504       case JVM_CONSTANT_MethodType: {
 505         const int ref_index = cp->method_type_index_at(index);
 506         check_property(valid_symbol_at(ref_index),
 507           "Invalid constant pool index %u in class file %s",
 508           ref_index, CHECK);
 509         break;
 510       }
 511       case JVM_CONSTANT_InvokeDynamic: {
 512         const int name_and_type_ref_index =
 513           cp->invoke_dynamic_name_and_type_ref_index_at(index);
 514 
 515         check_property(valid_cp_range(name_and_type_ref_index, length) &&
 516           cp->tag_at(name_and_type_ref_index).is_name_and_type(),
 517           "Invalid constant pool index %u in class file %s",
 518           name_and_type_ref_index, CHECK);
 519         // bootstrap specifier index must be checked later,
 520         // when BootstrapMethods attr is available
 521         break;
 522       }
 523       default: {
 524         fatal("bad constant pool tag value %u", cp->tag_at(index).value());
 525         ShouldNotReachHere();
 526         break;
 527       }
 528     } // switch(tag)
 529   } // end of for
 530 
 531   if (_cp_patches != NULL) {
 532     // need to treat this_class specially...
 533     int this_class_index;
 534     {
 535       stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
 536       const u1* const mark = stream->current();
 537       stream->skip_u2_fast(1); // skip flags
 538       this_class_index = stream->get_u2_fast();
 539       stream->set_current(mark);  // revert to mark
 540     }
 541 
 542     for (index = 1; index < length; index++) {          // Index 0 is unused
 543       if (has_cp_patch_at(index)) {
 544         guarantee_property(index != this_class_index,
 545           "Illegal constant pool patch to self at %d in class file %s",
 546           index, CHECK);
 547         patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
 548       }
 549     }
 550   }
 551 
 552   if (!_need_verify) {
 553     return;
 554   }
 555 
 556   // second verification pass - checks the strings are of the right format.
 557   // but not yet to the other entries
 558   for (index = 1; index < length; index++) {
 559     const jbyte tag = cp->tag_at(index).value();
 560     switch (tag) {
 561       case JVM_CONSTANT_UnresolvedClass: {
 562         const Symbol* const class_name = cp->klass_name_at(index);
 563         // check the name, even if _cp_patches will overwrite it
 564         verify_legal_class_name(class_name, CHECK);
 565         break;
 566       }
 567       case JVM_CONSTANT_NameAndType: {
 568         if (_need_verify) {
 569           const int sig_index = cp->signature_ref_index_at(index);
 570           const int name_index = cp->name_ref_index_at(index);
 571           const Symbol* const name = cp->symbol_at(name_index);
 572           const Symbol* const sig = cp->symbol_at(sig_index);
 573           guarantee_property(sig->utf8_length() != 0,
 574             "Illegal zero length constant pool entry at %d in class %s",
 575             sig_index, CHECK);
 576           guarantee_property(name->utf8_length() != 0,
 577             "Illegal zero length constant pool entry at %d in class %s",
 578             name_index, CHECK);
 579 
 580           if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
 581             // Format check method name and signature
 582             verify_legal_method_name(name, CHECK);
 583             verify_legal_method_signature(name, sig, CHECK);
 584           } else {
 585             // Format check field name and signature
 586             verify_legal_field_name(name, CHECK);
 587             verify_legal_field_signature(name, sig, CHECK);
 588           }
 589         }
 590         break;
 591       }
 592       case JVM_CONSTANT_InvokeDynamic:
 593       case JVM_CONSTANT_Fieldref:
 594       case JVM_CONSTANT_Methodref:
 595       case JVM_CONSTANT_InterfaceMethodref: {
 596         const int name_and_type_ref_index =
 597           cp->name_and_type_ref_index_at(index);
 598         // already verified to be utf8
 599         const int name_ref_index =
 600           cp->name_ref_index_at(name_and_type_ref_index);
 601         // already verified to be utf8
 602         const int signature_ref_index =
 603           cp->signature_ref_index_at(name_and_type_ref_index);
 604         const Symbol* const name = cp->symbol_at(name_ref_index);
 605         const Symbol* const signature = cp->symbol_at(signature_ref_index);
 606         if (tag == JVM_CONSTANT_Fieldref) {
 607           if (_need_verify) {
 608             // Field name and signature are verified above, when iterating NameAndType_info.
 609             // Need only to be sure signature is non-zero length and the right type.
 610             if (signature->utf8_length() == 0 ||
 611                 signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
 612               throwIllegalSignature("Field", name, signature, CHECK);
 613             }
 614           }
 615         } else {
 616           if (_need_verify) {
 617             // Method name and signature are verified above, when iterating NameAndType_info.
 618             // Need only to be sure signature is non-zero length and the right type.
 619             if (signature->utf8_length() == 0 ||
 620                 signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
 621               throwIllegalSignature("Method", name, signature, CHECK);
 622             }
 623           }
 624           // 4509014: If a class method name begins with '<', it must be "<init>"
 625           const unsigned int name_len = name->utf8_length();
 626           if (tag == JVM_CONSTANT_Methodref &&
 627               name_len != 0 &&
 628               name->byte_at(0) == '<' &&
 629               name != vmSymbols::object_initializer_name()) {
 630             classfile_parse_error(
 631               "Bad method name at constant pool index %u in class file %s",
 632               name_ref_index, CHECK);
 633           }
 634         }
 635         break;
 636       }
 637       case JVM_CONSTANT_MethodHandle: {
 638         const int ref_index = cp->method_handle_index_at(index);
 639         const int ref_kind = cp->method_handle_ref_kind_at(index);
 640         switch (ref_kind) {
 641           case JVM_REF_invokeVirtual:
 642           case JVM_REF_invokeStatic:
 643           case JVM_REF_invokeSpecial:
 644           case JVM_REF_newInvokeSpecial: {
 645             const int name_and_type_ref_index =
 646               cp->name_and_type_ref_index_at(ref_index);
 647             const int name_ref_index =
 648               cp->name_ref_index_at(name_and_type_ref_index);
 649             const Symbol* const name = cp->symbol_at(name_ref_index);
 650             if (ref_kind == JVM_REF_newInvokeSpecial) {
 651               if (name != vmSymbols::object_initializer_name()) {
 652                 classfile_parse_error(
 653                   "Bad constructor name at constant pool index %u in class file %s",
 654                     name_ref_index, CHECK);
 655               }
 656             } else {
 657               if (name == vmSymbols::object_initializer_name()) {
 658                 classfile_parse_error(
 659                   "Bad method name at constant pool index %u in class file %s",
 660                   name_ref_index, CHECK);
 661               }
 662             }
 663             break;
 664           }
 665           // Other ref_kinds are already fully checked in previous pass.
 666         } // switch(ref_kind)
 667         break;
 668       }
 669       case JVM_CONSTANT_MethodType: {
 670         const Symbol* const no_name = vmSymbols::type_name(); // place holder
 671         const Symbol* const signature = cp->method_type_signature_at(index);
 672         verify_legal_method_signature(no_name, signature, CHECK);
 673         break;
 674       }
 675       case JVM_CONSTANT_Utf8: {
 676         assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
 677       }
 678     }  // switch(tag)
 679   }  // end of for
 680 }
 681 
 682 void ClassFileParser::patch_constant_pool(ConstantPool* cp,
 683                                           int index,
 684                                           Handle patch,
 685                                           TRAPS) {
 686   assert(cp != NULL, "invariant");
 687 
 688   BasicType patch_type = T_VOID;
 689 
 690   switch (cp->tag_at(index).value()) {
 691 
 692     case JVM_CONSTANT_UnresolvedClass: {
 693       // Patching a class means pre-resolving it.
 694       // The name in the constant pool is ignored.
 695       if (java_lang_Class::is_instance(patch())) {
 696         guarantee_property(!java_lang_Class::is_primitive(patch()),
 697                            "Illegal class patch at %d in class file %s",
 698                            index, CHECK);
 699         cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
 700       } else {
 701         guarantee_property(java_lang_String::is_instance(patch()),
 702                            "Illegal class patch at %d in class file %s",
 703                            index, CHECK);
 704         Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
 705         cp->unresolved_klass_at_put(index, name);
 706       }
 707       break;
 708     }
 709 
 710     case JVM_CONSTANT_String: {
 711       // skip this patch and don't clear it.  Needs the oop array for resolved
 712       // references to be created first.
 713       return;
 714     }
 715     case JVM_CONSTANT_Integer: patch_type = T_INT;    goto patch_prim;
 716     case JVM_CONSTANT_Float:   patch_type = T_FLOAT;  goto patch_prim;
 717     case JVM_CONSTANT_Long:    patch_type = T_LONG;   goto patch_prim;
 718     case JVM_CONSTANT_Double:  patch_type = T_DOUBLE; goto patch_prim;
 719     patch_prim:
 720     {
 721       jvalue value;
 722       BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
 723       guarantee_property(value_type == patch_type,
 724                          "Illegal primitive patch at %d in class file %s",
 725                          index, CHECK);
 726       switch (value_type) {
 727         case T_INT:    cp->int_at_put(index,   value.i); break;
 728         case T_FLOAT:  cp->float_at_put(index, value.f); break;
 729         case T_LONG:   cp->long_at_put(index,  value.j); break;
 730         case T_DOUBLE: cp->double_at_put(index, value.d); break;
 731         default:       assert(false, "");
 732       }
 733     } // end patch_prim label
 734     break;
 735 
 736     default: {
 737       // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
 738       guarantee_property(!has_cp_patch_at(index),
 739                          "Illegal unexpected patch at %d in class file %s",
 740                          index, CHECK);
 741       return;
 742     }
 743   } // end of switch(tag)
 744 
 745   // On fall-through, mark the patch as used.
 746   clear_cp_patch_at(index);
 747 }
 748 class NameSigHash: public ResourceObj {
 749  public:
 750   const Symbol*       _name;       // name
 751   const Symbol*       _sig;        // signature
 752   NameSigHash*  _next;             // Next entry in hash table
 753 };
 754 
 755 static const int HASH_ROW_SIZE = 256;
 756 
 757 static unsigned int hash(const Symbol* name, const Symbol* sig) {
 758   unsigned int raw_hash = 0;
 759   raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
 760   raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
 761 
 762   return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
 763 }
 764 
 765 
 766 static void initialize_hashtable(NameSigHash** table) {
 767   memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
 768 }
 769 // Return false if the name/sig combination is found in table.
 770 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
 771 // The old format checker uses heap sort to find duplicates.
 772 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
 773 // of table since we don't expect Symbol*'s to move.
 774 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) {
 775   assert(name != NULL, "name in constant pool is NULL");
 776 
 777   // First lookup for duplicates
 778   int index = hash(name, sig);
 779   NameSigHash* entry = table[index];
 780   while (entry != NULL) {
 781     if (entry->_name == name && entry->_sig == sig) {
 782       return false;
 783     }
 784     entry = entry->_next;
 785   }
 786 
 787   // No duplicate is found, allocate a new entry and fill it.
 788   entry = new NameSigHash();
 789   entry->_name = name;
 790   entry->_sig = sig;
 791 
 792   // Insert into hash table
 793   entry->_next = table[index];
 794   table[index] = entry;
 795 
 796   return true;
 797 }
 798 
 799 // Side-effects: populates the _local_interfaces field
 800 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
 801                                        const int itfs_len,
 802                                        ConstantPool* const cp,
 803                                        bool* const has_nonstatic_concrete_methods,
 804                                        TRAPS) {
 805   assert(stream != NULL, "invariant");
 806   assert(cp != NULL, "invariant");
 807   assert(has_nonstatic_concrete_methods != NULL, "invariant");
 808 
 809   if (itfs_len == 0) {
 810     _local_interfaces = Universe::the_empty_klass_array();
 811   } else {
 812     assert(itfs_len > 0, "only called for len>0");
 813     _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
 814 
 815     int index;
 816     for (index = 0; index < itfs_len; index++) {
 817       const u2 interface_index = stream->get_u2(CHECK);
 818       KlassHandle interf;
 819       check_property(
 820         valid_klass_reference_at(interface_index),
 821         "Interface name has bad constant pool index %u in class file %s",
 822         interface_index, CHECK);
 823       if (cp->tag_at(interface_index).is_klass()) {
 824         interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
 825       } else {
 826         Symbol* const unresolved_klass  = cp->klass_name_at(interface_index);
 827 
 828         // Don't need to check legal name because it's checked when parsing constant pool.
 829         // But need to make sure it's not an array type.
 830         guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
 831                            "Bad interface name in class file %s", CHECK);
 832 
 833         // Call resolve_super so classcircularity is checked
 834         const Klass* const k =
 835           SystemDictionary::resolve_super_or_fail(_class_name,
 836                                                   unresolved_klass,
 837                                                   _loader_data->class_loader(),
 838                                                   _protection_domain,
 839                                                   false,
 840                                                   CHECK);
 841         interf = KlassHandle(THREAD, k);
 842       }
 843 
 844       if (!interf()->is_interface()) {
 845         THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
 846                    "Implementing class");
 847       }
 848 
 849       if (InstanceKlass::cast(interf())->has_nonstatic_concrete_methods()) {
 850         *has_nonstatic_concrete_methods = true;
 851       }
 852       _local_interfaces->at_put(index, interf());
 853     }
 854 
 855     if (!_need_verify || itfs_len <= 1) {
 856       return;
 857     }
 858 
 859     // Check if there's any duplicates in interfaces
 860     ResourceMark rm(THREAD);
 861     NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
 862                                                                  NameSigHash*,
 863                                                                  HASH_ROW_SIZE);
 864     initialize_hashtable(interface_names);
 865     bool dup = false;
 866     {
 867       debug_only(NoSafepointVerifier nsv;)
 868       for (index = 0; index < itfs_len; index++) {
 869         const Klass* const k = _local_interfaces->at(index);
 870         const Symbol* const name = InstanceKlass::cast(k)->name();
 871         // If no duplicates, add (name, NULL) in hashtable interface_names.
 872         if (!put_after_lookup(name, NULL, interface_names)) {
 873           dup = true;
 874           break;
 875         }
 876       }
 877     }
 878     if (dup) {
 879       classfile_parse_error("Duplicate interface name in class file %s", CHECK);
 880     }
 881   }
 882 }
 883 
 884 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
 885                                            int constantvalue_index,
 886                                            int signature_index,
 887                                            TRAPS) const {
 888   // Make sure the constant pool entry is of a type appropriate to this field
 889   guarantee_property(
 890     (constantvalue_index > 0 &&
 891       constantvalue_index < cp->length()),
 892     "Bad initial value index %u in ConstantValue attribute in class file %s",
 893     constantvalue_index, CHECK);
 894 
 895   const constantTag value_type = cp->tag_at(constantvalue_index);
 896   switch(cp->basic_type_for_signature_at(signature_index)) {
 897     case T_LONG: {
 898       guarantee_property(value_type.is_long(),
 899                          "Inconsistent constant value type in class file %s",
 900                          CHECK);
 901       break;
 902     }
 903     case T_FLOAT: {
 904       guarantee_property(value_type.is_float(),
 905                          "Inconsistent constant value type in class file %s",
 906                          CHECK);
 907       break;
 908     }
 909     case T_DOUBLE: {
 910       guarantee_property(value_type.is_double(),
 911                          "Inconsistent constant value type in class file %s",
 912                          CHECK);
 913       break;
 914     }
 915     case T_BYTE:
 916     case T_CHAR:
 917     case T_SHORT:
 918     case T_BOOLEAN:
 919     case T_INT: {
 920       guarantee_property(value_type.is_int(),
 921                          "Inconsistent constant value type in class file %s",
 922                          CHECK);
 923       break;
 924     }
 925     case T_OBJECT: {
 926       guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
 927                          && value_type.is_string()),
 928                          "Bad string initial value in class file %s",
 929                          CHECK);
 930       break;
 931     }
 932     default: {
 933       classfile_parse_error("Unable to set initial value %u in class file %s",
 934                              constantvalue_index,
 935                              CHECK);
 936     }
 937   }
 938 }
 939 
 940 class AnnotationCollector : public ResourceObj{
 941 public:
 942   enum Location { _in_field, _in_method, _in_class };
 943   enum ID {
 944     _unknown = 0,
 945     _method_CallerSensitive,
 946     _method_ForceInline,
 947     _method_DontInline,
 948     _method_InjectedProfile,
 949     _method_LambdaForm_Compiled,
 950     _method_LambdaForm_Hidden,
 951     _method_HotSpotIntrinsicCandidate,
 952     _jdk_internal_vm_annotation_Contended,
 953     _field_Stable,
 954     _jdk_internal_vm_annotation_ReservedStackAccess,
 955     _annotation_LIMIT
 956   };
 957   const Location _location;
 958   int _annotations_present;
 959   u2 _contended_group;
 960 
 961   AnnotationCollector(Location location)
 962     : _location(location), _annotations_present(0)
 963   {
 964     assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
 965   }
 966   // If this annotation name has an ID, report it (or _none).
 967   ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
 968   // Set the annotation name:
 969   void set_annotation(ID id) {
 970     assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
 971     _annotations_present |= nth_bit((int)id);
 972   }
 973 
 974   void remove_annotation(ID id) {
 975     assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
 976     _annotations_present &= ~nth_bit((int)id);
 977   }
 978 
 979   // Report if the annotation is present.
 980   bool has_any_annotations() const { return _annotations_present != 0; }
 981   bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
 982 
 983   void set_contended_group(u2 group) { _contended_group = group; }
 984   u2 contended_group() const { return _contended_group; }
 985 
 986   bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
 987 
 988   void set_stable(bool stable) { set_annotation(_field_Stable); }
 989   bool is_stable() const { return has_annotation(_field_Stable); }
 990 };
 991 
 992 // This class also doubles as a holder for metadata cleanup.
 993 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
 994 private:
 995   ClassLoaderData* _loader_data;
 996   AnnotationArray* _field_annotations;
 997   AnnotationArray* _field_type_annotations;
 998 public:
 999   FieldAnnotationCollector(ClassLoaderData* loader_data) :
1000     AnnotationCollector(_in_field),
1001     _loader_data(loader_data),
1002     _field_annotations(NULL),
1003     _field_type_annotations(NULL) {}
1004   ~FieldAnnotationCollector();
1005   void apply_to(FieldInfo* f);
1006   AnnotationArray* field_annotations()      { return _field_annotations; }
1007   AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1008 
1009   void set_field_annotations(AnnotationArray* a)      { _field_annotations = a; }
1010   void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1011 };
1012 
1013 class MethodAnnotationCollector : public AnnotationCollector{
1014 public:
1015   MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1016   void apply_to(methodHandle m);
1017 };
1018 
1019 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1020 public:
1021   ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1022   void apply_to(InstanceKlass* ik);
1023 };
1024 
1025 
1026 static int skip_annotation_value(const u1*, int, int); // fwd decl
1027 
1028 // Safely increment index by val if does not pass limit
1029 #define SAFE_ADD(index, limit, val) \
1030 if (index >= limit - val) return limit; \
1031 index += val;
1032 
1033 // Skip an annotation.  Return >=limit if there is any problem.
1034 static int skip_annotation(const u1* buffer, int limit, int index) {
1035   assert(buffer != NULL, "invariant");
1036   // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1037   // value := switch (tag:u1) { ... }
1038   SAFE_ADD(index, limit, 4); // skip atype and read nmem
1039   int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1040   while (--nmem >= 0 && index < limit) {
1041     SAFE_ADD(index, limit, 2); // skip member
1042     index = skip_annotation_value(buffer, limit, index);
1043   }
1044   return index;
1045 }
1046 
1047 // Skip an annotation value.  Return >=limit if there is any problem.
1048 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1049   assert(buffer != NULL, "invariant");
1050 
1051   // value := switch (tag:u1) {
1052   //   case B, C, I, S, Z, D, F, J, c: con:u2;
1053   //   case e: e_class:u2 e_name:u2;
1054   //   case s: s_con:u2;
1055   //   case [: do(nval:u2) {value};
1056   //   case @: annotation;
1057   //   case s: s_con:u2;
1058   // }
1059   SAFE_ADD(index, limit, 1); // read tag
1060   const u1 tag = buffer[index - 1];
1061   switch (tag) {
1062     case 'B':
1063     case 'C':
1064     case 'I':
1065     case 'S':
1066     case 'Z':
1067     case 'D':
1068     case 'F':
1069     case 'J':
1070     case 'c':
1071     case 's':
1072       SAFE_ADD(index, limit, 2);  // skip con or s_con
1073       break;
1074     case 'e':
1075       SAFE_ADD(index, limit, 4);  // skip e_class, e_name
1076       break;
1077     case '[':
1078     {
1079       SAFE_ADD(index, limit, 2); // read nval
1080       int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1081       while (--nval >= 0 && index < limit) {
1082         index = skip_annotation_value(buffer, limit, index);
1083       }
1084     }
1085     break;
1086     case '@':
1087       index = skip_annotation(buffer, limit, index);
1088       break;
1089     default:
1090       return limit;  //  bad tag byte
1091   }
1092   return index;
1093 }
1094 
1095 // Sift through annotations, looking for those significant to the VM:
1096 static void parse_annotations(const ConstantPool* const cp,
1097                               const u1* buffer, int limit,
1098                               AnnotationCollector* coll,
1099                               ClassLoaderData* loader_data,
1100                               TRAPS) {
1101 
1102   assert(cp != NULL, "invariant");
1103   assert(buffer != NULL, "invariant");
1104   assert(coll != NULL, "invariant");
1105   assert(loader_data != NULL, "invariant");
1106 
1107   // annotations := do(nann:u2) {annotation}
1108   int index = 2; // read nann
1109   if (index >= limit)  return;
1110   int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1111   enum {  // initial annotation layout
1112     atype_off = 0,      // utf8 such as 'Ljava/lang/annotation/Retention;'
1113     count_off = 2,      // u2   such as 1 (one value)
1114     member_off = 4,     // utf8 such as 'value'
1115     tag_off = 6,        // u1   such as 'c' (type) or 'e' (enum)
1116     e_tag_val = 'e',
1117     e_type_off = 7,   // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1118     e_con_off = 9,    // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1119     e_size = 11,     // end of 'e' annotation
1120     c_tag_val = 'c',    // payload is type
1121     c_con_off = 7,    // utf8 payload, such as 'I'
1122     c_size = 9,       // end of 'c' annotation
1123     s_tag_val = 's',    // payload is String
1124     s_con_off = 7,    // utf8 payload, such as 'Ljava/lang/String;'
1125     s_size = 9,
1126     min_size = 6        // smallest possible size (zero members)
1127   };
1128   // Cannot add min_size to index in case of overflow MAX_INT
1129   while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1130     int index0 = index;
1131     index = skip_annotation(buffer, limit, index);
1132     const u1* const abase = buffer + index0;
1133     const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1134     const int count = Bytes::get_Java_u2((address)abase + count_off);
1135     const Symbol* const aname = check_symbol_at(cp, atype);
1136     if (aname == NULL)  break;  // invalid annotation name
1137     const Symbol* member = NULL;
1138     if (count >= 1) {
1139       const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1140       member = check_symbol_at(cp, member_index);
1141       if (member == NULL)  break;  // invalid member name
1142     }
1143 
1144     // Here is where parsing particular annotations will take place.
1145     AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1146     if (AnnotationCollector::_unknown == id)  continue;
1147     coll->set_annotation(id);
1148 
1149     if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1150       // @Contended can optionally specify the contention group.
1151       //
1152       // Contended group defines the equivalence class over the fields:
1153       // the fields within the same contended group are not treated distinct.
1154       // The only exception is default group, which does not incur the
1155       // equivalence. Naturally, contention group for classes is meaningless.
1156       //
1157       // While the contention group is specified as String, annotation
1158       // values are already interned, and we might as well use the constant
1159       // pool index as the group tag.
1160       //
1161       u2 group_index = 0; // default contended group
1162       if (count == 1
1163         && s_size == (index - index0)  // match size
1164         && s_tag_val == *(abase + tag_off)
1165         && member == vmSymbols::value_name()) {
1166         group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1167         if (cp->symbol_at(group_index)->utf8_length() == 0) {
1168           group_index = 0; // default contended group
1169         }
1170       }
1171       coll->set_contended_group(group_index);
1172     }
1173   }
1174 }
1175 
1176 
1177 // Parse attributes for a field.
1178 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1179                                              u2 attributes_count,
1180                                              bool is_static, u2 signature_index,
1181                                              u2* const constantvalue_index_addr,
1182                                              bool* const is_synthetic_addr,
1183                                              u2* const generic_signature_index_addr,
1184                                              ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1185                                              TRAPS) {
1186   assert(cfs != NULL, "invariant");
1187   assert(constantvalue_index_addr != NULL, "invariant");
1188   assert(is_synthetic_addr != NULL, "invariant");
1189   assert(generic_signature_index_addr != NULL, "invariant");
1190   assert(parsed_annotations != NULL, "invariant");
1191   assert(attributes_count > 0, "attributes_count should be greater than 0");
1192 
1193   u2 constantvalue_index = 0;
1194   u2 generic_signature_index = 0;
1195   bool is_synthetic = false;
1196   const u1* runtime_visible_annotations = NULL;
1197   int runtime_visible_annotations_length = 0;
1198   const u1* runtime_invisible_annotations = NULL;
1199   int runtime_invisible_annotations_length = 0;
1200   const u1* runtime_visible_type_annotations = NULL;
1201   int runtime_visible_type_annotations_length = 0;
1202   const u1* runtime_invisible_type_annotations = NULL;
1203   int runtime_invisible_type_annotations_length = 0;
1204   bool runtime_invisible_annotations_exists = false;
1205   bool runtime_invisible_type_annotations_exists = false;
1206   const ConstantPool* const cp = _cp;
1207 
1208   while (attributes_count--) {
1209     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
1210     const u2 attribute_name_index = cfs->get_u2_fast();
1211     const u4 attribute_length = cfs->get_u4_fast();
1212     check_property(valid_symbol_at(attribute_name_index),
1213                    "Invalid field attribute index %u in class file %s",
1214                    attribute_name_index,
1215                    CHECK);
1216 
1217     const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1218     if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1219       // ignore if non-static
1220       if (constantvalue_index != 0) {
1221         classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1222       }
1223       check_property(
1224         attribute_length == 2,
1225         "Invalid ConstantValue field attribute length %u in class file %s",
1226         attribute_length, CHECK);
1227 
1228       constantvalue_index = cfs->get_u2(CHECK);
1229       if (_need_verify) {
1230         verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1231       }
1232     } else if (attribute_name == vmSymbols::tag_synthetic()) {
1233       if (attribute_length != 0) {
1234         classfile_parse_error(
1235           "Invalid Synthetic field attribute length %u in class file %s",
1236           attribute_length, CHECK);
1237       }
1238       is_synthetic = true;
1239     } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1240       if (attribute_length != 0) {
1241         classfile_parse_error(
1242           "Invalid Deprecated field attribute length %u in class file %s",
1243           attribute_length, CHECK);
1244       }
1245     } else if (_major_version >= JAVA_1_5_VERSION) {
1246       if (attribute_name == vmSymbols::tag_signature()) {
1247         if (attribute_length != 2) {
1248           classfile_parse_error(
1249             "Wrong size %u for field's Signature attribute in class file %s",
1250             attribute_length, CHECK);
1251         }
1252         generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1253       } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1254         if (runtime_visible_annotations != NULL) {
1255           classfile_parse_error(
1256             "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1257         }
1258         runtime_visible_annotations_length = attribute_length;
1259         runtime_visible_annotations = cfs->get_u1_buffer();
1260         assert(runtime_visible_annotations != NULL, "null visible annotations");
1261         cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1262         parse_annotations(cp,
1263                           runtime_visible_annotations,
1264                           runtime_visible_annotations_length,
1265                           parsed_annotations,
1266                           _loader_data,
1267                           CHECK);
1268         cfs->skip_u1_fast(runtime_visible_annotations_length);
1269       } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1270         if (runtime_invisible_annotations_exists) {
1271           classfile_parse_error(
1272             "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1273         }
1274         runtime_invisible_annotations_exists = true;
1275         if (PreserveAllAnnotations) {
1276           runtime_invisible_annotations_length = attribute_length;
1277           runtime_invisible_annotations = cfs->get_u1_buffer();
1278           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1279         }
1280         cfs->skip_u1(attribute_length, CHECK);
1281       } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1282         if (runtime_visible_type_annotations != NULL) {
1283           classfile_parse_error(
1284             "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1285         }
1286         runtime_visible_type_annotations_length = attribute_length;
1287         runtime_visible_type_annotations = cfs->get_u1_buffer();
1288         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1289         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1290       } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1291         if (runtime_invisible_type_annotations_exists) {
1292           classfile_parse_error(
1293             "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1294         } else {
1295           runtime_invisible_type_annotations_exists = true;
1296         }
1297         if (PreserveAllAnnotations) {
1298           runtime_invisible_type_annotations_length = attribute_length;
1299           runtime_invisible_type_annotations = cfs->get_u1_buffer();
1300           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1301         }
1302         cfs->skip_u1(attribute_length, CHECK);
1303       } else {
1304         cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1305       }
1306     } else {
1307       cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1308     }
1309   }
1310 
1311   *constantvalue_index_addr = constantvalue_index;
1312   *is_synthetic_addr = is_synthetic;
1313   *generic_signature_index_addr = generic_signature_index;
1314   AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1315                                             runtime_visible_annotations_length,
1316                                             runtime_invisible_annotations,
1317                                             runtime_invisible_annotations_length,
1318                                             CHECK);
1319   parsed_annotations->set_field_annotations(a);
1320   a = assemble_annotations(runtime_visible_type_annotations,
1321                            runtime_visible_type_annotations_length,
1322                            runtime_invisible_type_annotations,
1323                            runtime_invisible_type_annotations_length,
1324                            CHECK);
1325   parsed_annotations->set_field_type_annotations(a);
1326   return;
1327 }
1328 
1329 
1330 // Field allocation types. Used for computing field offsets.
1331 
1332 enum FieldAllocationType {
1333   STATIC_OOP,           // Oops
1334   STATIC_BYTE,          // Boolean, Byte, char
1335   STATIC_SHORT,         // shorts
1336   STATIC_WORD,          // ints
1337   STATIC_DOUBLE,        // aligned long or double
1338   NONSTATIC_OOP,
1339   NONSTATIC_BYTE,
1340   NONSTATIC_SHORT,
1341   NONSTATIC_WORD,
1342   NONSTATIC_DOUBLE,
1343   MAX_FIELD_ALLOCATION_TYPE,
1344   BAD_ALLOCATION_TYPE = -1
1345 };
1346 
1347 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1348   BAD_ALLOCATION_TYPE, // 0
1349   BAD_ALLOCATION_TYPE, // 1
1350   BAD_ALLOCATION_TYPE, // 2
1351   BAD_ALLOCATION_TYPE, // 3
1352   NONSTATIC_BYTE ,     // T_BOOLEAN     =  4,
1353   NONSTATIC_SHORT,     // T_CHAR        =  5,
1354   NONSTATIC_WORD,      // T_FLOAT       =  6,
1355   NONSTATIC_DOUBLE,    // T_DOUBLE      =  7,
1356   NONSTATIC_BYTE,      // T_BYTE        =  8,
1357   NONSTATIC_SHORT,     // T_SHORT       =  9,
1358   NONSTATIC_WORD,      // T_INT         = 10,
1359   NONSTATIC_DOUBLE,    // T_LONG        = 11,
1360   NONSTATIC_OOP,       // T_OBJECT      = 12,
1361   NONSTATIC_OOP,       // T_ARRAY       = 13,
1362   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1363   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1364   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1365   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1366   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1367   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1368   BAD_ALLOCATION_TYPE, // 0
1369   BAD_ALLOCATION_TYPE, // 1
1370   BAD_ALLOCATION_TYPE, // 2
1371   BAD_ALLOCATION_TYPE, // 3
1372   STATIC_BYTE ,        // T_BOOLEAN     =  4,
1373   STATIC_SHORT,        // T_CHAR        =  5,
1374   STATIC_WORD,         // T_FLOAT       =  6,
1375   STATIC_DOUBLE,       // T_DOUBLE      =  7,
1376   STATIC_BYTE,         // T_BYTE        =  8,
1377   STATIC_SHORT,        // T_SHORT       =  9,
1378   STATIC_WORD,         // T_INT         = 10,
1379   STATIC_DOUBLE,       // T_LONG        = 11,
1380   STATIC_OOP,          // T_OBJECT      = 12,
1381   STATIC_OOP,          // T_ARRAY       = 13,
1382   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1383   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1384   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1385   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1386   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1387   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1388 };
1389 
1390 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1391   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1392   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1393   assert(result != BAD_ALLOCATION_TYPE, "bad type");
1394   return result;
1395 }
1396 
1397 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1398  public:
1399   u2 count[MAX_FIELD_ALLOCATION_TYPE];
1400 
1401   FieldAllocationCount() {
1402     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1403       count[i] = 0;
1404     }
1405   }
1406 
1407   FieldAllocationType update(bool is_static, BasicType type) {
1408     FieldAllocationType atype = basic_type_to_atype(is_static, type);
1409     if (atype != BAD_ALLOCATION_TYPE) {
1410       // Make sure there is no overflow with injected fields.
1411       assert(count[atype] < 0xFFFF, "More than 65535 fields");
1412       count[atype]++;
1413     }
1414     return atype;
1415   }
1416 };
1417 
1418 // Side-effects: populates the _fields, _fields_annotations,
1419 // _fields_type_annotations fields
1420 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1421                                    bool is_interface,
1422                                    FieldAllocationCount* const fac,
1423                                    ConstantPool* cp,
1424                                    const int cp_size,
1425                                    u2* const java_fields_count_ptr,
1426                                    TRAPS) {
1427 
1428   assert(cfs != NULL, "invariant");
1429   assert(fac != NULL, "invariant");
1430   assert(cp != NULL, "invariant");
1431   assert(java_fields_count_ptr != NULL, "invariant");
1432 
1433   assert(NULL == _fields, "invariant");
1434   assert(NULL == _fields_annotations, "invariant");
1435   assert(NULL == _fields_type_annotations, "invariant");
1436 
1437   cfs->guarantee_more(2, CHECK);  // length
1438   const u2 length = cfs->get_u2_fast();
1439   *java_fields_count_ptr = length;
1440 
1441   int num_injected = 0;
1442   const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1443                                                                   &num_injected);
1444   const int total_fields = length + num_injected;
1445 
1446   // The field array starts with tuples of shorts
1447   // [access, name index, sig index, initial value index, byte offset].
1448   // A generic signature slot only exists for field with generic
1449   // signature attribute. And the access flag is set with
1450   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1451   // signature slots are at the end of the field array and after all
1452   // other fields data.
1453   //
1454   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1455   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1456   //       ...
1457   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1458   //       [generic signature index]
1459   //       [generic signature index]
1460   //       ...
1461   //
1462   // Allocate a temporary resource array for field data. For each field,
1463   // a slot is reserved in the temporary array for the generic signature
1464   // index. After parsing all fields, the data are copied to a permanent
1465   // array and any unused slots will be discarded.
1466   ResourceMark rm(THREAD);
1467   u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1468                                               u2,
1469                                               total_fields * (FieldInfo::field_slots + 1));
1470 
1471   // The generic signature slots start after all other fields' data.
1472   int generic_signature_slot = total_fields * FieldInfo::field_slots;
1473   int num_generic_signature = 0;
1474   for (int n = 0; n < length; n++) {
1475     // access_flags, name_index, descriptor_index, attributes_count
1476     cfs->guarantee_more(8, CHECK);
1477 
1478     AccessFlags access_flags;
1479     const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1480     verify_legal_field_modifiers(flags, is_interface, CHECK);
1481     access_flags.set_flags(flags);
1482 
1483     const u2 name_index = cfs->get_u2_fast();
1484     check_property(valid_symbol_at(name_index),
1485       "Invalid constant pool index %u for field name in class file %s",
1486       name_index, CHECK);
1487     const Symbol* const name = cp->symbol_at(name_index);
1488     verify_legal_field_name(name, CHECK);
1489 
1490     const u2 signature_index = cfs->get_u2_fast();
1491     check_property(valid_symbol_at(signature_index),
1492       "Invalid constant pool index %u for field signature in class file %s",
1493       signature_index, CHECK);
1494     const Symbol* const sig = cp->symbol_at(signature_index);
1495     verify_legal_field_signature(name, sig, CHECK);
1496 
1497     u2 constantvalue_index = 0;
1498     bool is_synthetic = false;
1499     u2 generic_signature_index = 0;
1500     const bool is_static = access_flags.is_static();
1501     FieldAnnotationCollector parsed_annotations(_loader_data);
1502 
1503     const u2 attributes_count = cfs->get_u2_fast();
1504     if (attributes_count > 0) {
1505       parse_field_attributes(cfs,
1506                              attributes_count,
1507                              is_static,
1508                              signature_index,
1509                              &constantvalue_index,
1510                              &is_synthetic,
1511                              &generic_signature_index,
1512                              &parsed_annotations,
1513                              CHECK);
1514 
1515       if (parsed_annotations.field_annotations() != NULL) {
1516         if (_fields_annotations == NULL) {
1517           _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1518                                              _loader_data, length, NULL,
1519                                              CHECK);
1520         }
1521         _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1522         parsed_annotations.set_field_annotations(NULL);
1523       }
1524       if (parsed_annotations.field_type_annotations() != NULL) {
1525         if (_fields_type_annotations == NULL) {
1526           _fields_type_annotations =
1527             MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1528                                                          length,
1529                                                          NULL,
1530                                                          CHECK);
1531         }
1532         _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1533         parsed_annotations.set_field_type_annotations(NULL);
1534       }
1535 
1536       if (is_synthetic) {
1537         access_flags.set_is_synthetic();
1538       }
1539       if (generic_signature_index != 0) {
1540         access_flags.set_field_has_generic_signature();
1541         fa[generic_signature_slot] = generic_signature_index;
1542         generic_signature_slot ++;
1543         num_generic_signature ++;
1544       }
1545     }
1546 
1547     FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1548     field->initialize(access_flags.as_short(),
1549                       name_index,
1550                       signature_index,
1551                       constantvalue_index);
1552     const BasicType type = cp->basic_type_for_signature_at(signature_index);
1553 
1554     // Remember how many oops we encountered and compute allocation type
1555     const FieldAllocationType atype = fac->update(is_static, type);
1556     field->set_allocation_type(atype);
1557 
1558     // After field is initialized with type, we can augment it with aux info
1559     if (parsed_annotations.has_any_annotations())
1560       parsed_annotations.apply_to(field);
1561   }
1562 
1563   int index = length;
1564   if (num_injected != 0) {
1565     for (int n = 0; n < num_injected; n++) {
1566       // Check for duplicates
1567       if (injected[n].may_be_java) {
1568         const Symbol* const name      = injected[n].name();
1569         const Symbol* const signature = injected[n].signature();
1570         bool duplicate = false;
1571         for (int i = 0; i < length; i++) {
1572           const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1573           if (name      == cp->symbol_at(f->name_index()) &&
1574               signature == cp->symbol_at(f->signature_index())) {
1575             // Symbol is desclared in Java so skip this one
1576             duplicate = true;
1577             break;
1578           }
1579         }
1580         if (duplicate) {
1581           // These will be removed from the field array at the end
1582           continue;
1583         }
1584       }
1585 
1586       // Injected field
1587       FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1588       field->initialize(JVM_ACC_FIELD_INTERNAL,
1589                         injected[n].name_index,
1590                         injected[n].signature_index,
1591                         0);
1592 
1593       const BasicType type = FieldType::basic_type(injected[n].signature());
1594 
1595       // Remember how many oops we encountered and compute allocation type
1596       const FieldAllocationType atype = fac->update(false, type);
1597       field->set_allocation_type(atype);
1598       index++;
1599     }
1600   }
1601 
1602   assert(NULL == _fields, "invariant");
1603 
1604   _fields =
1605     MetadataFactory::new_array<u2>(_loader_data,
1606                                    index * FieldInfo::field_slots + num_generic_signature,
1607                                    CHECK);
1608   // Sometimes injected fields already exist in the Java source so
1609   // the fields array could be too long.  In that case the
1610   // fields array is trimed. Also unused slots that were reserved
1611   // for generic signature indexes are discarded.
1612   {
1613     int i = 0;
1614     for (; i < index * FieldInfo::field_slots; i++) {
1615       _fields->at_put(i, fa[i]);
1616     }
1617     for (int j = total_fields * FieldInfo::field_slots;
1618          j < generic_signature_slot; j++) {
1619       _fields->at_put(i++, fa[j]);
1620     }
1621     assert(_fields->length() == i, "");
1622   }
1623 
1624   if (_need_verify && length > 1) {
1625     // Check duplicated fields
1626     ResourceMark rm(THREAD);
1627     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1628       THREAD, NameSigHash*, HASH_ROW_SIZE);
1629     initialize_hashtable(names_and_sigs);
1630     bool dup = false;
1631     {
1632       debug_only(NoSafepointVerifier nsv;)
1633       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1634         const Symbol* const name = fs.name();
1635         const Symbol* const sig = fs.signature();
1636         // If no duplicates, add name/signature in hashtable names_and_sigs.
1637         if (!put_after_lookup(name, sig, names_and_sigs)) {
1638           dup = true;
1639           break;
1640         }
1641       }
1642     }
1643     if (dup) {
1644       classfile_parse_error("Duplicate field name&signature in class file %s",
1645                             CHECK);
1646     }
1647   }
1648 }
1649 
1650 
1651 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1652   while (length-- > 0) {
1653     *dest++ = Bytes::get_Java_u2((u1*) (src++));
1654   }
1655 }
1656 
1657 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1658                                                  u4 code_length,
1659                                                  u4 exception_table_length,
1660                                                  TRAPS) {
1661   assert(cfs != NULL, "invariant");
1662 
1663   const u2* const exception_table_start = cfs->get_u2_buffer();
1664   assert(exception_table_start != NULL, "null exception table");
1665 
1666   cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1667                                                                // end_pc,
1668                                                                // handler_pc,
1669                                                                // catch_type_index
1670 
1671   // Will check legal target after parsing code array in verifier.
1672   if (_need_verify) {
1673     for (unsigned int i = 0; i < exception_table_length; i++) {
1674       const u2 start_pc = cfs->get_u2_fast();
1675       const u2 end_pc = cfs->get_u2_fast();
1676       const u2 handler_pc = cfs->get_u2_fast();
1677       const u2 catch_type_index = cfs->get_u2_fast();
1678       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1679                          "Illegal exception table range in class file %s",
1680                          CHECK_NULL);
1681       guarantee_property(handler_pc < code_length,
1682                          "Illegal exception table handler in class file %s",
1683                          CHECK_NULL);
1684       if (catch_type_index != 0) {
1685         guarantee_property(valid_klass_reference_at(catch_type_index),
1686                            "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1687       }
1688     }
1689   } else {
1690     cfs->skip_u2_fast(exception_table_length * 4);
1691   }
1692   return exception_table_start;
1693 }
1694 
1695 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1696                                              u4 code_length,
1697                                              CompressedLineNumberWriteStream**const write_stream,
1698                                              TRAPS) {
1699 
1700   const ClassFileStream* const cfs = _stream;
1701   unsigned int num_entries = cfs->get_u2(CHECK);
1702 
1703   // Each entry is a u2 start_pc, and a u2 line_number
1704   const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1705 
1706   // Verify line number attribute and table length
1707   check_property(
1708     code_attribute_length == sizeof(u2) + length_in_bytes,
1709     "LineNumberTable attribute has wrong length in class file %s", CHECK);
1710 
1711   cfs->guarantee_more(length_in_bytes, CHECK);
1712 
1713   if ((*write_stream) == NULL) {
1714     if (length_in_bytes > fixed_buffer_size) {
1715       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1716     } else {
1717       (*write_stream) = new CompressedLineNumberWriteStream(
1718         _linenumbertable_buffer, fixed_buffer_size);
1719     }
1720   }
1721 
1722   while (num_entries-- > 0) {
1723     const u2 bci  = cfs->get_u2_fast(); // start_pc
1724     const u2 line = cfs->get_u2_fast(); // line_number
1725     guarantee_property(bci < code_length,
1726         "Invalid pc in LineNumberTable in class file %s", CHECK);
1727     (*write_stream)->write_pair(bci, line);
1728   }
1729 }
1730 
1731 
1732 class LVT_Hash : public AllStatic {
1733  public:
1734 
1735   static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1736   /*
1737    * 3-tuple start_bci/length/slot has to be unique key,
1738    * so the following comparison seems to be redundant:
1739    *       && elem->name_cp_index == entry->_elem->name_cp_index
1740    */
1741     return (e0.start_bci     == e1.start_bci &&
1742             e0.length        == e1.length &&
1743             e0.name_cp_index == e1.name_cp_index &&
1744             e0.slot          == e1.slot);
1745   }
1746 
1747   static unsigned int hash(LocalVariableTableElement const& e0) {
1748     unsigned int raw_hash = e0.start_bci;
1749 
1750     raw_hash = e0.length        + raw_hash * 37;
1751     raw_hash = e0.name_cp_index + raw_hash * 37;
1752     raw_hash = e0.slot          + raw_hash * 37;
1753 
1754     return raw_hash;
1755   }
1756 };
1757 
1758 
1759 // Class file LocalVariableTable elements.
1760 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1761  public:
1762   u2 start_bci;
1763   u2 length;
1764   u2 name_cp_index;
1765   u2 descriptor_cp_index;
1766   u2 slot;
1767 };
1768 
1769 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1770                              LocalVariableTableElement* const lvt) {
1771   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
1772   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
1773   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1774   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1775   lvt->signature_cp_index  = 0;
1776   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
1777 }
1778 
1779 // Function is used to parse both attributes:
1780 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1781 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1782                                                      u4 code_length,
1783                                                      u2 max_locals,
1784                                                      u4 code_attribute_length,
1785                                                      u2* const localvariable_table_length,
1786                                                      bool isLVTT,
1787                                                      TRAPS) {
1788   const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1789   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1790   const unsigned int size =
1791     (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1792 
1793   const ConstantPool* const cp = _cp;
1794 
1795   // Verify local variable table attribute has right length
1796   if (_need_verify) {
1797     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1798                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1799   }
1800 
1801   const u2* const localvariable_table_start = cfs->get_u2_buffer();
1802   assert(localvariable_table_start != NULL, "null local variable table");
1803   if (!_need_verify) {
1804     cfs->skip_u2_fast(size);
1805   } else {
1806     cfs->guarantee_more(size * 2, CHECK_NULL);
1807     for(int i = 0; i < (*localvariable_table_length); i++) {
1808       const u2 start_pc = cfs->get_u2_fast();
1809       const u2 length = cfs->get_u2_fast();
1810       const u2 name_index = cfs->get_u2_fast();
1811       const u2 descriptor_index = cfs->get_u2_fast();
1812       const u2 index = cfs->get_u2_fast();
1813       // Assign to a u4 to avoid overflow
1814       const u4 end_pc = (u4)start_pc + (u4)length;
1815 
1816       if (start_pc >= code_length) {
1817         classfile_parse_error(
1818           "Invalid start_pc %u in %s in class file %s",
1819           start_pc, tbl_name, CHECK_NULL);
1820       }
1821       if (end_pc > code_length) {
1822         classfile_parse_error(
1823           "Invalid length %u in %s in class file %s",
1824           length, tbl_name, CHECK_NULL);
1825       }
1826       const int cp_size = cp->length();
1827       guarantee_property(valid_symbol_at(name_index),
1828         "Name index %u in %s has bad constant type in class file %s",
1829         name_index, tbl_name, CHECK_NULL);
1830       guarantee_property(valid_symbol_at(descriptor_index),
1831         "Signature index %u in %s has bad constant type in class file %s",
1832         descriptor_index, tbl_name, CHECK_NULL);
1833 
1834       const Symbol* const name = cp->symbol_at(name_index);
1835       const Symbol* const sig = cp->symbol_at(descriptor_index);
1836       verify_legal_field_name(name, CHECK_NULL);
1837       u2 extra_slot = 0;
1838       if (!isLVTT) {
1839         verify_legal_field_signature(name, sig, CHECK_NULL);
1840 
1841         // 4894874: check special cases for double and long local variables
1842         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1843             sig == vmSymbols::type_signature(T_LONG)) {
1844           extra_slot = 1;
1845         }
1846       }
1847       guarantee_property((index + extra_slot) < max_locals,
1848                           "Invalid index %u in %s in class file %s",
1849                           index, tbl_name, CHECK_NULL);
1850     }
1851   }
1852   return localvariable_table_start;
1853 }
1854 
1855 
1856 void ClassFileParser::parse_type_array(u2 array_length,
1857                                        u4 code_length,
1858                                        u4* const u1_index,
1859                                        u4* const u2_index,
1860                                        u1* const u1_array,
1861                                        u2* const u2_array,
1862                                        TRAPS) {
1863   const ClassFileStream* const cfs = _stream;
1864   u2 index = 0; // index in the array with long/double occupying two slots
1865   u4 i1 = *u1_index;
1866   u4 i2 = *u2_index + 1;
1867   for(int i = 0; i < array_length; i++) {
1868     const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1869     index++;
1870     if (tag == ITEM_Long || tag == ITEM_Double) {
1871       index++;
1872     } else if (tag == ITEM_Object) {
1873       const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1874       guarantee_property(valid_klass_reference_at(class_index),
1875                          "Bad class index %u in StackMap in class file %s",
1876                          class_index, CHECK);
1877     } else if (tag == ITEM_Uninitialized) {
1878       const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1879       guarantee_property(
1880         offset < code_length,
1881         "Bad uninitialized type offset %u in StackMap in class file %s",
1882         offset, CHECK);
1883     } else {
1884       guarantee_property(
1885         tag <= (u1)ITEM_Uninitialized,
1886         "Unknown variable type %u in StackMap in class file %s",
1887         tag, CHECK);
1888     }
1889   }
1890   u2_array[*u2_index] = index;
1891   *u1_index = i1;
1892   *u2_index = i2;
1893 }
1894 
1895 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1896                                       u4 code_attribute_length,
1897                                       bool need_verify,
1898                                       TRAPS) {
1899   assert(cfs != NULL, "invariant");
1900 
1901   if (0 == code_attribute_length) {
1902     return NULL;
1903   }
1904 
1905   const u1* const stackmap_table_start = cfs->get_u1_buffer();
1906   assert(stackmap_table_start != NULL, "null stackmap table");
1907 
1908   // check code_attribute_length first
1909   cfs->skip_u1(code_attribute_length, CHECK_NULL);
1910 
1911   if (!need_verify && !DumpSharedSpaces) {
1912     return NULL;
1913   }
1914   return stackmap_table_start;
1915 }
1916 
1917 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1918                                                     u2* const checked_exceptions_length,
1919                                                     u4 method_attribute_length,
1920                                                     TRAPS) {
1921   assert(cfs != NULL, "invariant");
1922   assert(checked_exceptions_length != NULL, "invariant");
1923 
1924   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
1925   *checked_exceptions_length = cfs->get_u2_fast();
1926   const unsigned int size =
1927     (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1928   const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1929   assert(checked_exceptions_start != NULL, "null checked exceptions");
1930   if (!_need_verify) {
1931     cfs->skip_u2_fast(size);
1932   } else {
1933     // Verify each value in the checked exception table
1934     u2 checked_exception;
1935     const u2 len = *checked_exceptions_length;
1936     cfs->guarantee_more(2 * len, CHECK_NULL);
1937     for (int i = 0; i < len; i++) {
1938       checked_exception = cfs->get_u2_fast();
1939       check_property(
1940         valid_klass_reference_at(checked_exception),
1941         "Exception name has bad type at constant pool %u in class file %s",
1942         checked_exception, CHECK_NULL);
1943     }
1944   }
1945   // check exceptions attribute length
1946   if (_need_verify) {
1947     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1948                                                    sizeof(u2) * size),
1949                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1950   }
1951   return checked_exceptions_start;
1952 }
1953 
1954 void ClassFileParser::throwIllegalSignature(const char* type,
1955                                             const Symbol* name,
1956                                             const Symbol* sig,
1957                                             TRAPS) const {
1958   assert(name != NULL, "invariant");
1959   assert(sig != NULL, "invariant");
1960 
1961   ResourceMark rm(THREAD);
1962   Exceptions::fthrow(THREAD_AND_LOCATION,
1963       vmSymbols::java_lang_ClassFormatError(),
1964       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1965       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1966 }
1967 
1968 AnnotationCollector::ID
1969 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1970                                       const Symbol* name) {
1971   const vmSymbols::SID sid = vmSymbols::find_sid(name);
1972   // Privileged code can use all annotations.  Other code silently drops some.
1973   const bool privileged = loader_data->is_the_null_class_loader_data() ||
1974                           loader_data->is_platform_class_loader_data() ||
1975                           loader_data->is_anonymous();
1976   switch (sid) {
1977     case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1978       if (_location != _in_method)  break;  // only allow for methods
1979       if (!privileged)              break;  // only allow in privileged code
1980       return _method_CallerSensitive;
1981     }
1982     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1983       if (_location != _in_method)  break;  // only allow for methods
1984       if (!privileged)              break;  // only allow in privileged code
1985       return _method_ForceInline;
1986     }
1987     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1988       if (_location != _in_method)  break;  // only allow for methods
1989       if (!privileged)              break;  // only allow in privileged code
1990       return _method_DontInline;
1991     }
1992     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1993       if (_location != _in_method)  break;  // only allow for methods
1994       if (!privileged)              break;  // only allow in privileged code
1995       return _method_InjectedProfile;
1996     }
1997     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
1998       if (_location != _in_method)  break;  // only allow for methods
1999       if (!privileged)              break;  // only allow in privileged code
2000       return _method_LambdaForm_Compiled;
2001     }
2002     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2003       if (_location != _in_method)  break;  // only allow for methods
2004       if (!privileged)              break;  // only allow in privileged code
2005       return _method_LambdaForm_Hidden;
2006     }
2007     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2008       if (_location != _in_method)  break;  // only allow for methods
2009       if (!privileged)              break;  // only allow in privileged code
2010       return _method_HotSpotIntrinsicCandidate;
2011     }
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         cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2584         parse_annotations(cp,
2585                           runtime_visible_annotations,
2586                           runtime_visible_annotations_length,
2587                           &parsed_annotations,
2588                           _loader_data,
2589                           CHECK_NULL);
2590         cfs->skip_u1_fast(runtime_visible_annotations_length);
2591       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2592         if (runtime_invisible_annotations_exists) {
2593           classfile_parse_error(
2594             "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2595             CHECK_NULL);
2596         }
2597         runtime_invisible_annotations_exists = true;
2598         if (PreserveAllAnnotations) {
2599           runtime_invisible_annotations_length = method_attribute_length;
2600           runtime_invisible_annotations = cfs->get_u1_buffer();
2601           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2602         }
2603         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2604       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2605         if (runtime_visible_parameter_annotations != NULL) {
2606           classfile_parse_error(
2607             "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2608             CHECK_NULL);
2609         }
2610         runtime_visible_parameter_annotations_length = method_attribute_length;
2611         runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2612         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2613         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2614       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2615         if (runtime_invisible_parameter_annotations_exists) {
2616           classfile_parse_error(
2617             "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2618             CHECK_NULL);
2619         }
2620         runtime_invisible_parameter_annotations_exists = true;
2621         if (PreserveAllAnnotations) {
2622           runtime_invisible_parameter_annotations_length = method_attribute_length;
2623           runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2624           assert(runtime_invisible_parameter_annotations != NULL,
2625             "null invisible parameter annotations");
2626         }
2627         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2628       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2629         if (annotation_default != NULL) {
2630           classfile_parse_error(
2631             "Multiple AnnotationDefault attributes for method in class file %s",
2632             CHECK_NULL);
2633         }
2634         annotation_default_length = method_attribute_length;
2635         annotation_default = cfs->get_u1_buffer();
2636         assert(annotation_default != NULL, "null annotation default");
2637         cfs->skip_u1(annotation_default_length, CHECK_NULL);
2638       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2639         if (runtime_visible_type_annotations != NULL) {
2640           classfile_parse_error(
2641             "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2642             CHECK_NULL);
2643         }
2644         runtime_visible_type_annotations_length = method_attribute_length;
2645         runtime_visible_type_annotations = cfs->get_u1_buffer();
2646         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2647         // No need for the VM to parse Type annotations
2648         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2649       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2650         if (runtime_invisible_type_annotations_exists) {
2651           classfile_parse_error(
2652             "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2653             CHECK_NULL);
2654         } else {
2655           runtime_invisible_type_annotations_exists = true;
2656         }
2657         if (PreserveAllAnnotations) {
2658           runtime_invisible_type_annotations_length = method_attribute_length;
2659           runtime_invisible_type_annotations = cfs->get_u1_buffer();
2660           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2661         }
2662         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2663       } else {
2664         // Skip unknown attributes
2665         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2666       }
2667     } else {
2668       // Skip unknown attributes
2669       cfs->skip_u1(method_attribute_length, CHECK_NULL);
2670     }
2671   }
2672 
2673   if (linenumber_table != NULL) {
2674     linenumber_table->write_terminator();
2675     linenumber_table_length = linenumber_table->position();
2676   }
2677 
2678   // Make sure there's at least one Code attribute in non-native/non-abstract method
2679   if (_need_verify) {
2680     guarantee_property(access_flags.is_native() ||
2681                        access_flags.is_abstract() ||
2682                        parsed_code_attribute,
2683                        "Absent Code attribute in method that is not native or abstract in class file %s",
2684                        CHECK_NULL);
2685   }
2686 
2687   // All sizing information for a Method* is finally available, now create it
2688   InlineTableSizes sizes(
2689       total_lvt_length,
2690       linenumber_table_length,
2691       exception_table_length,
2692       checked_exceptions_length,
2693       method_parameters_length,
2694       generic_signature_index,
2695       runtime_visible_annotations_length +
2696            runtime_invisible_annotations_length,
2697       runtime_visible_parameter_annotations_length +
2698            runtime_invisible_parameter_annotations_length,
2699       runtime_visible_type_annotations_length +
2700            runtime_invisible_type_annotations_length,
2701       annotation_default_length,
2702       0);
2703 
2704   Method* const m = Method::allocate(_loader_data,
2705                                      code_length,
2706                                      access_flags,
2707                                      &sizes,
2708                                      ConstMethod::NORMAL,
2709                                      CHECK_NULL);
2710 
2711   ClassLoadingService::add_class_method_size(m->size()*wordSize);
2712 
2713   // Fill in information from fixed part (access_flags already set)
2714   m->set_constants(_cp);
2715   m->set_name_index(name_index);
2716   m->set_signature_index(signature_index);
2717 
2718   ResultTypeFinder rtf(cp->symbol_at(signature_index));
2719   m->constMethod()->set_result_type(rtf.type());
2720 
2721   if (args_size >= 0) {
2722     m->set_size_of_parameters(args_size);
2723   } else {
2724     m->compute_size_of_parameters(THREAD);
2725   }
2726 #ifdef ASSERT
2727   if (args_size >= 0) {
2728     m->compute_size_of_parameters(THREAD);
2729     assert(args_size == m->size_of_parameters(), "");
2730   }
2731 #endif
2732 
2733   // Fill in code attribute information
2734   m->set_max_stack(max_stack);
2735   m->set_max_locals(max_locals);
2736   if (stackmap_data != NULL) {
2737     m->constMethod()->copy_stackmap_data(_loader_data,
2738                                          (u1*)stackmap_data,
2739                                          stackmap_data_length,
2740                                          CHECK_NULL);
2741   }
2742 
2743   // Copy byte codes
2744   m->set_code((u1*)code_start);
2745 
2746   // Copy line number table
2747   if (linenumber_table != NULL) {
2748     memcpy(m->compressed_linenumber_table(),
2749            linenumber_table->buffer(),
2750            linenumber_table_length);
2751   }
2752 
2753   // Copy exception table
2754   if (exception_table_length > 0) {
2755     int size =
2756       exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2757     copy_u2_with_conversion((u2*) m->exception_table_start(),
2758                             exception_table_start, size);
2759   }
2760 
2761   // Copy method parameters
2762   if (method_parameters_length > 0) {
2763     MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2764     for (int i = 0; i < method_parameters_length; i++) {
2765       elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2766       method_parameters_data += 2;
2767       elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2768       method_parameters_data += 2;
2769     }
2770   }
2771 
2772   // Copy checked exceptions
2773   if (checked_exceptions_length > 0) {
2774     const int size =
2775       checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2776     copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2777                             checked_exceptions_start,
2778                             size);
2779   }
2780 
2781   // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2782   if (total_lvt_length > 0) {
2783     promoted_flags->set_has_localvariable_table();
2784     copy_localvariable_table(m->constMethod(),
2785                              lvt_cnt,
2786                              localvariable_table_length,
2787                              localvariable_table_start,
2788                              lvtt_cnt,
2789                              localvariable_type_table_length,
2790                              localvariable_type_table_start,
2791                              CHECK_NULL);
2792   }
2793 
2794   if (parsed_annotations.has_any_annotations())
2795     parsed_annotations.apply_to(m);
2796 
2797   // Copy annotations
2798   copy_method_annotations(m->constMethod(),
2799                           runtime_visible_annotations,
2800                           runtime_visible_annotations_length,
2801                           runtime_invisible_annotations,
2802                           runtime_invisible_annotations_length,
2803                           runtime_visible_parameter_annotations,
2804                           runtime_visible_parameter_annotations_length,
2805                           runtime_invisible_parameter_annotations,
2806                           runtime_invisible_parameter_annotations_length,
2807                           runtime_visible_type_annotations,
2808                           runtime_visible_type_annotations_length,
2809                           runtime_invisible_type_annotations,
2810                           runtime_invisible_type_annotations_length,
2811                           annotation_default,
2812                           annotation_default_length,
2813                           CHECK_NULL);
2814 
2815   if (name == vmSymbols::finalize_method_name() &&
2816       signature == vmSymbols::void_method_signature()) {
2817     if (m->is_empty_method()) {
2818       _has_empty_finalizer = true;
2819     } else {
2820       _has_finalizer = true;
2821     }
2822   }
2823   if (name == vmSymbols::object_initializer_name() &&
2824       signature == vmSymbols::void_method_signature() &&
2825       m->is_vanilla_constructor()) {
2826     _has_vanilla_constructor = true;
2827   }
2828 
2829   NOT_PRODUCT(m->verify());
2830   return m;
2831 }
2832 
2833 
2834 // The promoted_flags parameter is used to pass relevant access_flags
2835 // from the methods back up to the containing klass. These flag values
2836 // are added to klass's access_flags.
2837 // Side-effects: populates the _methods field in the parser
2838 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2839                                     bool is_interface,
2840                                     AccessFlags* promoted_flags,
2841                                     bool* has_final_method,
2842                                     bool* declares_nonstatic_concrete_methods,
2843                                     TRAPS) {
2844   assert(cfs != NULL, "invariant");
2845   assert(promoted_flags != NULL, "invariant");
2846   assert(has_final_method != NULL, "invariant");
2847   assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2848 
2849   assert(NULL == _methods, "invariant");
2850 
2851   cfs->guarantee_more(2, CHECK);  // length
2852   const u2 length = cfs->get_u2_fast();
2853   if (length == 0) {
2854     _methods = Universe::the_empty_method_array();
2855   } else {
2856     _methods = MetadataFactory::new_array<Method*>(_loader_data,
2857                                                    length,
2858                                                    NULL,
2859                                                    CHECK);
2860 
2861     HandleMark hm(THREAD);
2862     for (int index = 0; index < length; index++) {
2863       Method* method = parse_method(cfs,
2864                                     is_interface,
2865                                     _cp,
2866                                     promoted_flags,
2867                                     CHECK);
2868 
2869       if (method->is_final()) {
2870         *has_final_method = true;
2871       }
2872       // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2873       // used for interface initialization, and default method inheritance analysis
2874       if (is_interface && !(*declares_nonstatic_concrete_methods)
2875         && !method->is_abstract() && !method->is_static()) {
2876         *declares_nonstatic_concrete_methods = true;
2877       }
2878       _methods->at_put(index, method);
2879     }
2880 
2881     if (_need_verify && length > 1) {
2882       // Check duplicated methods
2883       ResourceMark rm(THREAD);
2884       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2885         THREAD, NameSigHash*, HASH_ROW_SIZE);
2886       initialize_hashtable(names_and_sigs);
2887       bool dup = false;
2888       {
2889         debug_only(NoSafepointVerifier nsv;)
2890         for (int i = 0; i < length; i++) {
2891           const Method* const m = _methods->at(i);
2892           // If no duplicates, add name/signature in hashtable names_and_sigs.
2893           if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
2894             dup = true;
2895             break;
2896           }
2897         }
2898       }
2899       if (dup) {
2900         classfile_parse_error("Duplicate method name&signature in class file %s",
2901                               CHECK);
2902       }
2903     }
2904   }
2905 }
2906 
2907 static const intArray* sort_methods(Array<Method*>* methods) {
2908   const int length = methods->length();
2909   // If JVMTI original method ordering or sharing is enabled we have to
2910   // remember the original class file ordering.
2911   // We temporarily use the vtable_index field in the Method* to store the
2912   // class file index, so we can read in after calling qsort.
2913   // Put the method ordering in the shared archive.
2914   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2915     for (int index = 0; index < length; index++) {
2916       Method* const m = methods->at(index);
2917       assert(!m->valid_vtable_index(), "vtable index should not be set");
2918       m->set_vtable_index(index);
2919     }
2920   }
2921   // Sort method array by ascending method name (for faster lookups & vtable construction)
2922   // Note that the ordering is not alphabetical, see Symbol::fast_compare
2923   Method::sort_methods(methods);
2924 
2925   intArray* method_ordering = NULL;
2926   // If JVMTI original method ordering or sharing is enabled construct int
2927   // array remembering the original ordering
2928   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2929     method_ordering = new intArray(length, length, -1);
2930     for (int index = 0; index < length; index++) {
2931       Method* const m = methods->at(index);
2932       const int old_index = m->vtable_index();
2933       assert(old_index >= 0 && old_index < length, "invalid method index");
2934       method_ordering->at_put(index, old_index);
2935       m->set_vtable_index(Method::invalid_vtable_index);
2936     }
2937   }
2938   return method_ordering;
2939 }
2940 
2941 // Parse generic_signature attribute for methods and fields
2942 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2943                                                       TRAPS) {
2944   assert(cfs != NULL, "invariant");
2945 
2946   cfs->guarantee_more(2, CHECK_0);  // generic_signature_index
2947   const u2 generic_signature_index = cfs->get_u2_fast();
2948   check_property(
2949     valid_symbol_at(generic_signature_index),
2950     "Invalid Signature attribute at constant pool index %u in class file %s",
2951     generic_signature_index, CHECK_0);
2952   return generic_signature_index;
2953 }
2954 
2955 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2956                                                            TRAPS) {
2957 
2958   assert(cfs != NULL, "invariant");
2959 
2960   cfs->guarantee_more(2, CHECK);  // sourcefile_index
2961   const u2 sourcefile_index = cfs->get_u2_fast();
2962   check_property(
2963     valid_symbol_at(sourcefile_index),
2964     "Invalid SourceFile attribute at constant pool index %u in class file %s",
2965     sourcefile_index, CHECK);
2966   set_class_sourcefile_index(sourcefile_index);
2967 }
2968 
2969 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2970                                                                        int length,
2971                                                                        TRAPS) {
2972   assert(cfs != NULL, "invariant");
2973 
2974   const u1* const sde_buffer = cfs->get_u1_buffer();
2975   assert(sde_buffer != NULL, "null sde buffer");
2976 
2977   // Don't bother storing it if there is no way to retrieve it
2978   if (JvmtiExport::can_get_source_debug_extension()) {
2979     assert((length+1) > length, "Overflow checking");
2980     u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2981     for (int i = 0; i < length; i++) {
2982       sde[i] = sde_buffer[i];
2983     }
2984     sde[length] = '\0';
2985     set_class_sde_buffer((const char*)sde, length);
2986   }
2987   // Got utf8 string, set stream position forward
2988   cfs->skip_u1(length, CHECK);
2989 }
2990 
2991 
2992 // Inner classes can be static, private or protected (classic VM does this)
2993 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
2994                                            JVM_ACC_PRIVATE |                \
2995                                            JVM_ACC_PROTECTED |              \
2996                                            JVM_ACC_STATIC                   \
2997                                          )
2998 
2999 // Return number of classes in the inner classes attribute table
3000 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3001                                                             const u1* const inner_classes_attribute_start,
3002                                                             bool parsed_enclosingmethod_attribute,
3003                                                             u2 enclosing_method_class_index,
3004                                                             u2 enclosing_method_method_index,
3005                                                             TRAPS) {
3006   const u1* const current_mark = cfs->current();
3007   u2 length = 0;
3008   if (inner_classes_attribute_start != NULL) {
3009     cfs->set_current(inner_classes_attribute_start);
3010     cfs->guarantee_more(2, CHECK_0);  // length
3011     length = cfs->get_u2_fast();
3012   }
3013 
3014   // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3015   // method data:
3016   //   [inner_class_info_index,
3017   //    outer_class_info_index,
3018   //    inner_name_index,
3019   //    inner_class_access_flags,
3020   //    ...
3021   //    enclosing_method_class_index,
3022   //    enclosing_method_method_index]
3023   const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3024   Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3025   _inner_classes = inner_classes;
3026 
3027   int index = 0;
3028   const int cp_size = _cp->length();
3029   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
3030   for (int n = 0; n < length; n++) {
3031     // Inner class index
3032     const u2 inner_class_info_index = cfs->get_u2_fast();
3033     check_property(
3034       valid_klass_reference_at(inner_class_info_index),
3035       "inner_class_info_index %u has bad constant type in class file %s",
3036       inner_class_info_index, CHECK_0);
3037     // Outer class index
3038     const u2 outer_class_info_index = cfs->get_u2_fast();
3039     check_property(
3040       outer_class_info_index == 0 ||
3041         valid_klass_reference_at(outer_class_info_index),
3042       "outer_class_info_index %u has bad constant type in class file %s",
3043       outer_class_info_index, CHECK_0);
3044     // Inner class name
3045     const u2 inner_name_index = cfs->get_u2_fast();
3046     check_property(
3047       inner_name_index == 0 || valid_symbol_at(inner_name_index),
3048       "inner_name_index %u has bad constant type in class file %s",
3049       inner_name_index, CHECK_0);
3050     if (_need_verify) {
3051       guarantee_property(inner_class_info_index != outer_class_info_index,
3052                          "Class is both outer and inner class in class file %s", CHECK_0);
3053     }
3054     // Access flags
3055     jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3056     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3057       // Set abstract bit for old class files for backward compatibility
3058       flags |= JVM_ACC_ABSTRACT;
3059     }
3060     verify_legal_class_modifiers(flags, CHECK_0);
3061     AccessFlags inner_access_flags(flags);
3062 
3063     inner_classes->at_put(index++, inner_class_info_index);
3064     inner_classes->at_put(index++, outer_class_info_index);
3065     inner_classes->at_put(index++, inner_name_index);
3066     inner_classes->at_put(index++, inner_access_flags.as_short());
3067   }
3068 
3069   // 4347400: make sure there's no duplicate entry in the classes array
3070   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3071     for(int i = 0; i < length * 4; i += 4) {
3072       for(int j = i + 4; j < length * 4; j += 4) {
3073         guarantee_property((inner_classes->at(i)   != inner_classes->at(j) ||
3074                             inner_classes->at(i+1) != inner_classes->at(j+1) ||
3075                             inner_classes->at(i+2) != inner_classes->at(j+2) ||
3076                             inner_classes->at(i+3) != inner_classes->at(j+3)),
3077                             "Duplicate entry in InnerClasses in class file %s",
3078                             CHECK_0);
3079       }
3080     }
3081   }
3082 
3083   // Set EnclosingMethod class and method indexes.
3084   if (parsed_enclosingmethod_attribute) {
3085     inner_classes->at_put(index++, enclosing_method_class_index);
3086     inner_classes->at_put(index++, enclosing_method_method_index);
3087   }
3088   assert(index == size, "wrong size");
3089 
3090   // Restore buffer's current position.
3091   cfs->set_current(current_mark);
3092 
3093   return length;
3094 }
3095 
3096 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3097   set_class_synthetic_flag(true);
3098 }
3099 
3100 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3101   assert(cfs != NULL, "invariant");
3102 
3103   const u2 signature_index = cfs->get_u2(CHECK);
3104   check_property(
3105     valid_symbol_at(signature_index),
3106     "Invalid constant pool index %u in Signature attribute in class file %s",
3107     signature_index, CHECK);
3108   set_class_generic_signature_index(signature_index);
3109 }
3110 
3111 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3112                                                                   ConstantPool* cp,
3113                                                                   u4 attribute_byte_length,
3114                                                                   TRAPS) {
3115   assert(cfs != NULL, "invariant");
3116   assert(cp != NULL, "invariant");
3117 
3118   const u1* const current_start = cfs->current();
3119 
3120   guarantee_property(attribute_byte_length >= sizeof(u2),
3121                      "Invalid BootstrapMethods attribute length %u in class file %s",
3122                      attribute_byte_length,
3123                      CHECK);
3124 
3125   cfs->guarantee_more(attribute_byte_length, CHECK);
3126 
3127   const int attribute_array_length = cfs->get_u2_fast();
3128 
3129   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3130                      "Short length on BootstrapMethods in class file %s",
3131                      CHECK);
3132 
3133 
3134   // The attribute contains a counted array of counted tuples of shorts,
3135   // represending bootstrap specifiers:
3136   //    length*{bootstrap_method_index, argument_count*{argument_index}}
3137   const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3138   // operand_count = number of shorts in attr, except for leading length
3139 
3140   // The attribute is copied into a short[] array.
3141   // The array begins with a series of short[2] pairs, one for each tuple.
3142   const int index_size = (attribute_array_length * 2);
3143 
3144   Array<u2>* const operands =
3145     MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3146 
3147   // Eagerly assign operands so they will be deallocated with the constant
3148   // pool if there is an error.
3149   cp->set_operands(operands);
3150 
3151   int operand_fill_index = index_size;
3152   const int cp_size = cp->length();
3153 
3154   for (int n = 0; n < attribute_array_length; n++) {
3155     // Store a 32-bit offset into the header of the operand array.
3156     ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3157 
3158     // Read a bootstrap specifier.
3159     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
3160     const u2 bootstrap_method_index = cfs->get_u2_fast();
3161     const u2 argument_count = cfs->get_u2_fast();
3162     check_property(
3163       valid_cp_range(bootstrap_method_index, cp_size) &&
3164       cp->tag_at(bootstrap_method_index).is_method_handle(),
3165       "bootstrap_method_index %u has bad constant type in class file %s",
3166       bootstrap_method_index,
3167       CHECK);
3168 
3169     guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3170       "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3171       CHECK);
3172 
3173     operands->at_put(operand_fill_index++, bootstrap_method_index);
3174     operands->at_put(operand_fill_index++, argument_count);
3175 
3176     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
3177     for (int j = 0; j < argument_count; j++) {
3178       const u2 argument_index = cfs->get_u2_fast();
3179       check_property(
3180         valid_cp_range(argument_index, cp_size) &&
3181         cp->tag_at(argument_index).is_loadable_constant(),
3182         "argument_index %u has bad constant type in class file %s",
3183         argument_index,
3184         CHECK);
3185       operands->at_put(operand_fill_index++, argument_index);
3186     }
3187   }
3188   guarantee_property(current_start + attribute_byte_length == cfs->current(),
3189                      "Bad length on BootstrapMethods in class file %s",
3190                      CHECK);
3191 }
3192 
3193 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3194                                                  ConstantPool* cp,
3195                  ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3196                                                  TRAPS) {
3197   assert(cfs != NULL, "invariant");
3198   assert(cp != NULL, "invariant");
3199   assert(parsed_annotations != NULL, "invariant");
3200 
3201   // Set inner classes attribute to default sentinel
3202   _inner_classes = Universe::the_empty_short_array();
3203   cfs->guarantee_more(2, CHECK);  // attributes_count
3204   u2 attributes_count = cfs->get_u2_fast();
3205   bool parsed_sourcefile_attribute = false;
3206   bool parsed_innerclasses_attribute = false;
3207   bool parsed_enclosingmethod_attribute = false;
3208   bool parsed_bootstrap_methods_attribute = false;
3209   const u1* runtime_visible_annotations = NULL;
3210   int runtime_visible_annotations_length = 0;
3211   const u1* runtime_invisible_annotations = NULL;
3212   int runtime_invisible_annotations_length = 0;
3213   const u1* runtime_visible_type_annotations = NULL;
3214   int runtime_visible_type_annotations_length = 0;
3215   const u1* runtime_invisible_type_annotations = NULL;
3216   int runtime_invisible_type_annotations_length = 0;
3217   bool runtime_invisible_type_annotations_exists = false;
3218   bool runtime_invisible_annotations_exists = false;
3219   bool parsed_source_debug_ext_annotations_exist = false;
3220   const u1* inner_classes_attribute_start = NULL;
3221   u4  inner_classes_attribute_length = 0;
3222   u2  enclosing_method_class_index = 0;
3223   u2  enclosing_method_method_index = 0;
3224   // Iterate over attributes
3225   while (attributes_count--) {
3226     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
3227     const u2 attribute_name_index = cfs->get_u2_fast();
3228     const u4 attribute_length = cfs->get_u4_fast();
3229     check_property(
3230       valid_symbol_at(attribute_name_index),
3231       "Attribute name has bad constant pool index %u in class file %s",
3232       attribute_name_index, CHECK);
3233     const Symbol* const tag = cp->symbol_at(attribute_name_index);
3234     if (tag == vmSymbols::tag_source_file()) {
3235       // Check for SourceFile tag
3236       if (_need_verify) {
3237         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3238       }
3239       if (parsed_sourcefile_attribute) {
3240         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3241       } else {
3242         parsed_sourcefile_attribute = true;
3243       }
3244       parse_classfile_sourcefile_attribute(cfs, CHECK);
3245     } else if (tag == vmSymbols::tag_source_debug_extension()) {
3246       // Check for SourceDebugExtension tag
3247       if (parsed_source_debug_ext_annotations_exist) {
3248           classfile_parse_error(
3249             "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3250       }
3251       parsed_source_debug_ext_annotations_exist = true;
3252       parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3253     } else if (tag == vmSymbols::tag_inner_classes()) {
3254       // Check for InnerClasses tag
3255       if (parsed_innerclasses_attribute) {
3256         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3257       } else {
3258         parsed_innerclasses_attribute = true;
3259       }
3260       inner_classes_attribute_start = cfs->get_u1_buffer();
3261       inner_classes_attribute_length = attribute_length;
3262       cfs->skip_u1(inner_classes_attribute_length, CHECK);
3263     } else if (tag == vmSymbols::tag_synthetic()) {
3264       // Check for Synthetic tag
3265       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3266       if (attribute_length != 0) {
3267         classfile_parse_error(
3268           "Invalid Synthetic classfile attribute length %u in class file %s",
3269           attribute_length, CHECK);
3270       }
3271       parse_classfile_synthetic_attribute(CHECK);
3272     } else if (tag == vmSymbols::tag_deprecated()) {
3273       // Check for Deprecatd tag - 4276120
3274       if (attribute_length != 0) {
3275         classfile_parse_error(
3276           "Invalid Deprecated classfile attribute length %u in class file %s",
3277           attribute_length, CHECK);
3278       }
3279     } else if (_major_version >= JAVA_1_5_VERSION) {
3280       if (tag == vmSymbols::tag_signature()) {
3281         if (attribute_length != 2) {
3282           classfile_parse_error(
3283             "Wrong Signature attribute length %u in class file %s",
3284             attribute_length, CHECK);
3285         }
3286         parse_classfile_signature_attribute(cfs, CHECK);
3287       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3288         if (runtime_visible_annotations != NULL) {
3289           classfile_parse_error(
3290             "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3291         }
3292         runtime_visible_annotations_length = attribute_length;
3293         runtime_visible_annotations = cfs->get_u1_buffer();
3294         assert(runtime_visible_annotations != NULL, "null visible annotations");
3295         cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
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_fast(runtime_visible_annotations_length);
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         }
3343         parsed_bootstrap_methods_attribute = true;
3344         parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3345       } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3346         if (runtime_visible_type_annotations != NULL) {
3347           classfile_parse_error(
3348             "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3349         }
3350         runtime_visible_type_annotations_length = attribute_length;
3351         runtime_visible_type_annotations = cfs->get_u1_buffer();
3352         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3353         // No need for the VM to parse Type annotations
3354         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3355       } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3356         if (runtime_invisible_type_annotations_exists) {
3357           classfile_parse_error(
3358             "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3359         } else {
3360           runtime_invisible_type_annotations_exists = true;
3361         }
3362         if (PreserveAllAnnotations) {
3363           runtime_invisible_type_annotations_length = attribute_length;
3364           runtime_invisible_type_annotations = cfs->get_u1_buffer();
3365           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3366         }
3367         cfs->skip_u1(attribute_length, CHECK);
3368       } else {
3369         // Unknown attribute
3370         cfs->skip_u1(attribute_length, CHECK);
3371       }
3372     } else {
3373       // Unknown attribute
3374       cfs->skip_u1(attribute_length, CHECK);
3375     }
3376   }
3377   _annotations = assemble_annotations(runtime_visible_annotations,
3378                                       runtime_visible_annotations_length,
3379                                       runtime_invisible_annotations,
3380                                       runtime_invisible_annotations_length,
3381                                       CHECK);
3382   _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3383                                            runtime_visible_type_annotations_length,
3384                                            runtime_invisible_type_annotations,
3385                                            runtime_invisible_type_annotations_length,
3386                                            CHECK);
3387 
3388   if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3389     const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3390                             cfs,
3391                             inner_classes_attribute_start,
3392                             parsed_innerclasses_attribute,
3393                             enclosing_method_class_index,
3394                             enclosing_method_method_index,
3395                             CHECK);
3396     if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3397       guarantee_property(
3398         inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3399         "Wrong InnerClasses attribute length in class file %s", CHECK);
3400     }
3401   }
3402 
3403   if (_max_bootstrap_specifier_index >= 0) {
3404     guarantee_property(parsed_bootstrap_methods_attribute,
3405                        "Missing BootstrapMethods attribute in class file %s", CHECK);
3406   }
3407 }
3408 
3409 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3410   assert(k != NULL, "invariant");
3411 
3412   if (_synthetic_flag)
3413     k->set_is_synthetic();
3414   if (_sourcefile_index != 0) {
3415     k->set_source_file_name_index(_sourcefile_index);
3416   }
3417   if (_generic_signature_index != 0) {
3418     k->set_generic_signature_index(_generic_signature_index);
3419   }
3420   if (_sde_buffer != NULL) {
3421     k->set_source_debug_extension(_sde_buffer, _sde_length);
3422   }
3423 }
3424 
3425 // Create the Annotations object that will
3426 // hold the annotations array for the Klass.
3427 void ClassFileParser::create_combined_annotations(TRAPS) {
3428     if (_annotations == NULL &&
3429         _type_annotations == NULL &&
3430         _fields_annotations == NULL &&
3431         _fields_type_annotations == NULL) {
3432       // Don't create the Annotations object unnecessarily.
3433       return;
3434     }
3435 
3436     Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3437     annotations->set_class_annotations(_annotations);
3438     annotations->set_class_type_annotations(_type_annotations);
3439     annotations->set_fields_annotations(_fields_annotations);
3440     annotations->set_fields_type_annotations(_fields_type_annotations);
3441 
3442     // This is the Annotations object that will be
3443     // assigned to InstanceKlass being constructed.
3444     _combined_annotations = annotations;
3445 
3446     // The annotations arrays below has been transfered the
3447     // _combined_annotations so these fields can now be cleared.
3448     _annotations             = NULL;
3449     _type_annotations        = NULL;
3450     _fields_annotations      = NULL;
3451     _fields_type_annotations = NULL;
3452 }
3453 
3454 // Transfer ownership of metadata allocated to the InstanceKlass.
3455 void ClassFileParser::apply_parsed_class_metadata(
3456                                             InstanceKlass* this_klass,
3457                                             int java_fields_count, TRAPS) {
3458   assert(this_klass != NULL, "invariant");
3459 
3460   _cp->set_pool_holder(this_klass);
3461   this_klass->set_constants(_cp);
3462   this_klass->set_fields(_fields, java_fields_count);
3463   this_klass->set_methods(_methods);
3464   this_klass->set_inner_classes(_inner_classes);
3465   this_klass->set_local_interfaces(_local_interfaces);
3466   this_klass->set_transitive_interfaces(_transitive_interfaces);
3467   this_klass->set_annotations(_combined_annotations);
3468 
3469   // Clear out these fields so they don't get deallocated by the destructor
3470   clear_class_metadata();
3471 }
3472 
3473 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3474                                                        int runtime_visible_annotations_length,
3475                                                        const u1* const runtime_invisible_annotations,
3476                                                        int runtime_invisible_annotations_length,
3477                                                        TRAPS) {
3478   AnnotationArray* annotations = NULL;
3479   if (runtime_visible_annotations != NULL ||
3480       runtime_invisible_annotations != NULL) {
3481     annotations = MetadataFactory::new_array<u1>(_loader_data,
3482                                           runtime_visible_annotations_length +
3483                                           runtime_invisible_annotations_length,
3484                                           CHECK_(annotations));
3485     if (runtime_visible_annotations != NULL) {
3486       for (int i = 0; i < runtime_visible_annotations_length; i++) {
3487         annotations->at_put(i, runtime_visible_annotations[i]);
3488       }
3489     }
3490     if (runtime_invisible_annotations != NULL) {
3491       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3492         int append = runtime_visible_annotations_length+i;
3493         annotations->at_put(append, runtime_invisible_annotations[i]);
3494       }
3495     }
3496   }
3497   return annotations;
3498 }
3499 
3500 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3501                                                         const int super_class_index,
3502                                                         const bool need_verify,
3503                                                         TRAPS) {
3504   assert(cp != NULL, "invariant");
3505   const InstanceKlass* super_klass = NULL;
3506 
3507   if (super_class_index == 0) {
3508     check_property(_class_name == vmSymbols::java_lang_Object(),
3509                    "Invalid superclass index %u in class file %s",
3510                    super_class_index,
3511                    CHECK_NULL);
3512   } else {
3513     check_property(valid_klass_reference_at(super_class_index),
3514                    "Invalid superclass index %u in class file %s",
3515                    super_class_index,
3516                    CHECK_NULL);
3517     // The class name should be legal because it is checked when parsing constant pool.
3518     // However, make sure it is not an array type.
3519     bool is_array = false;
3520     if (cp->tag_at(super_class_index).is_klass()) {
3521       super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3522       if (need_verify)
3523         is_array = super_klass->is_array_klass();
3524     } else if (need_verify) {
3525       is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3526     }
3527     if (need_verify) {
3528       guarantee_property(!is_array,
3529                         "Bad superclass name in class file %s", CHECK_NULL);
3530     }
3531   }
3532   return super_klass;
3533 }
3534 
3535 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3536                                           unsigned int nonstatic_oop_map_count,
3537                                           int first_nonstatic_oop_offset) {
3538 
3539   unsigned int map_count =
3540     NULL == super ? 0 : super->nonstatic_oop_map_count();
3541   if (nonstatic_oop_map_count > 0) {
3542     // We have oops to add to map
3543     if (map_count == 0) {
3544       map_count = nonstatic_oop_map_count;
3545     }
3546     else {
3547       // Check whether we should add a new map block or whether the last one can
3548       // be extended
3549       const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3550       const OopMapBlock* const last_map = first_map + map_count - 1;
3551 
3552       const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3553       if (next_offset == first_nonstatic_oop_offset) {
3554         // There is no gap bettwen superklass's last oop field and first
3555         // local oop field, merge maps.
3556         nonstatic_oop_map_count -= 1;
3557       }
3558       else {
3559         // Superklass didn't end with a oop field, add extra maps
3560         assert(next_offset < first_nonstatic_oop_offset, "just checking");
3561       }
3562       map_count += nonstatic_oop_map_count;
3563     }
3564   }
3565   return map_count;
3566 }
3567 
3568 #ifndef PRODUCT
3569 static void print_field_layout(const Symbol* name,
3570                                Array<u2>* fields,
3571                                constantPoolHandle cp,
3572                                int instance_size,
3573                                int instance_fields_start,
3574                                int instance_fields_end,
3575                                int static_fields_end) {
3576 
3577   assert(name != NULL, "invariant");
3578 
3579   tty->print("%s: field layout\n", name->as_klass_external_name());
3580   tty->print("  @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3581   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3582     if (!fs.access_flags().is_static()) {
3583       tty->print("  @%3d \"%s\" %s\n",
3584         fs.offset(),
3585         fs.name()->as_klass_external_name(),
3586         fs.signature()->as_klass_external_name());
3587     }
3588   }
3589   tty->print("  @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3590   tty->print("  @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3591   tty->print("  @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3592   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3593     if (fs.access_flags().is_static()) {
3594       tty->print("  @%3d \"%s\" %s\n",
3595         fs.offset(),
3596         fs.name()->as_klass_external_name(),
3597         fs.signature()->as_klass_external_name());
3598     }
3599   }
3600   tty->print("  @%3d %s\n", static_fields_end, "--- static fields end ---");
3601   tty->print("\n");
3602 }
3603 #endif
3604 
3605 // Values needed for oopmap and InstanceKlass creation
3606 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3607  public:
3608   int*          nonstatic_oop_offsets;
3609   unsigned int* nonstatic_oop_counts;
3610   unsigned int  nonstatic_oop_map_count;
3611   unsigned int  total_oop_map_count;
3612   int           instance_size;
3613   int           nonstatic_field_size;
3614   int           static_field_size;
3615   bool          has_nonstatic_fields;
3616 };
3617 
3618 // Layout fields and fill in FieldLayoutInfo.  Could use more refactoring!
3619 void ClassFileParser::layout_fields(ConstantPool* cp,
3620                                     const FieldAllocationCount* fac,
3621                                     const ClassAnnotationCollector* parsed_annotations,
3622                                     FieldLayoutInfo* info,
3623                                     TRAPS) {
3624 
3625   assert(cp != NULL, "invariant");
3626 
3627   // Field size and offset computation
3628   int nonstatic_field_size = _super_klass == NULL ? 0 :
3629                                _super_klass->nonstatic_field_size();
3630 
3631   // Count the contended fields by type.
3632   //
3633   // We ignore static fields, because @Contended is not supported for them.
3634   // The layout code below will also ignore the static fields.
3635   int nonstatic_contended_count = 0;
3636   FieldAllocationCount fac_contended;
3637   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3638     FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3639     if (fs.is_contended()) {
3640       fac_contended.count[atype]++;
3641       if (!fs.access_flags().is_static()) {
3642         nonstatic_contended_count++;
3643       }
3644     }
3645   }
3646 
3647 
3648   // Calculate the starting byte offsets
3649   int next_static_oop_offset    = InstanceMirrorKlass::offset_of_static_fields();
3650   int next_static_double_offset = next_static_oop_offset +
3651                                       ((fac->count[STATIC_OOP]) * heapOopSize);
3652   if ( fac->count[STATIC_DOUBLE] &&
3653        (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3654         Universe::field_type_should_be_aligned(T_LONG)) ) {
3655     next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3656   }
3657 
3658   int next_static_word_offset   = next_static_double_offset +
3659                                     ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3660   int next_static_short_offset  = next_static_word_offset +
3661                                     ((fac->count[STATIC_WORD]) * BytesPerInt);
3662   int next_static_byte_offset   = next_static_short_offset +
3663                                   ((fac->count[STATIC_SHORT]) * BytesPerShort);
3664 
3665   int nonstatic_fields_start  = instanceOopDesc::base_offset_in_bytes() +
3666                                 nonstatic_field_size * heapOopSize;
3667 
3668   int next_nonstatic_field_offset = nonstatic_fields_start;
3669 
3670   const bool is_contended_class     = parsed_annotations->is_contended();
3671 
3672   // Class is contended, pad before all the fields
3673   if (is_contended_class) {
3674     next_nonstatic_field_offset += ContendedPaddingWidth;
3675   }
3676 
3677   // Compute the non-contended fields count.
3678   // The packing code below relies on these counts to determine if some field
3679   // can be squeezed into the alignment gap. Contended fields are obviously
3680   // exempt from that.
3681   unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3682   unsigned int nonstatic_word_count   = fac->count[NONSTATIC_WORD]   - fac_contended.count[NONSTATIC_WORD];
3683   unsigned int nonstatic_short_count  = fac->count[NONSTATIC_SHORT]  - fac_contended.count[NONSTATIC_SHORT];
3684   unsigned int nonstatic_byte_count   = fac->count[NONSTATIC_BYTE]   - fac_contended.count[NONSTATIC_BYTE];
3685   unsigned int nonstatic_oop_count    = fac->count[NONSTATIC_OOP]    - fac_contended.count[NONSTATIC_OOP];
3686 
3687   // Total non-static fields count, including every contended field
3688   unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3689                                         fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3690                                         fac->count[NONSTATIC_OOP];
3691 
3692   const bool super_has_nonstatic_fields =
3693           (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3694   const bool has_nonstatic_fields =
3695     super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3696 
3697 
3698   // Prepare list of oops for oop map generation.
3699   //
3700   // "offset" and "count" lists are describing the set of contiguous oop
3701   // regions. offset[i] is the start of the i-th region, which then has
3702   // count[i] oops following. Before we know how many regions are required,
3703   // we pessimistically allocate the maps to fit all the oops into the
3704   // distinct regions.
3705   //
3706   // TODO: We add +1 to always allocate non-zero resource arrays; we need
3707   // to figure out if we still need to do this.
3708   unsigned int nonstatic_oop_map_count = 0;
3709   unsigned int max_nonstatic_oop_maps  = fac->count[NONSTATIC_OOP] + 1;
3710 
3711   int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3712             THREAD, int, max_nonstatic_oop_maps);
3713   unsigned int* const nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
3714             THREAD, unsigned int, max_nonstatic_oop_maps);
3715 
3716   int first_nonstatic_oop_offset = 0; // will be set for first oop field
3717 
3718   bool compact_fields   = CompactFields;
3719   int allocation_style = FieldsAllocationStyle;
3720   if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3721     assert(false, "0 <= FieldsAllocationStyle <= 2");
3722     allocation_style = 1; // Optimistic
3723   }
3724 
3725   // The next classes have predefined hard-coded fields offsets
3726   // (see in JavaClasses::compute_hard_coded_offsets()).
3727   // Use default fields allocation order for them.
3728   if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3729       (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3730        _class_name == vmSymbols::java_lang_Class() ||
3731        _class_name == vmSymbols::java_lang_ClassLoader() ||
3732        _class_name == vmSymbols::java_lang_ref_Reference() ||
3733        _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3734        _class_name == vmSymbols::java_lang_StackTraceElement() ||
3735        _class_name == vmSymbols::java_lang_String() ||
3736        _class_name == vmSymbols::java_lang_Throwable() ||
3737        _class_name == vmSymbols::java_lang_Boolean() ||
3738        _class_name == vmSymbols::java_lang_Character() ||
3739        _class_name == vmSymbols::java_lang_Float() ||
3740        _class_name == vmSymbols::java_lang_Double() ||
3741        _class_name == vmSymbols::java_lang_Byte() ||
3742        _class_name == vmSymbols::java_lang_Short() ||
3743        _class_name == vmSymbols::java_lang_Integer() ||
3744        _class_name == vmSymbols::java_lang_Long())) {
3745     allocation_style = 0;     // Allocate oops first
3746     compact_fields   = false; // Don't compact fields
3747   }
3748 
3749   int next_nonstatic_oop_offset = 0;
3750   int next_nonstatic_double_offset = 0;
3751 
3752   // Rearrange fields for a given allocation style
3753   if( allocation_style == 0 ) {
3754     // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3755     next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3756     next_nonstatic_double_offset = next_nonstatic_oop_offset +
3757                                     (nonstatic_oop_count * heapOopSize);
3758   } else if( allocation_style == 1 ) {
3759     // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3760     next_nonstatic_double_offset = next_nonstatic_field_offset;
3761   } else if( allocation_style == 2 ) {
3762     // Fields allocation: oops fields in super and sub classes are together.
3763     if( nonstatic_field_size > 0 && _super_klass != NULL &&
3764         _super_klass->nonstatic_oop_map_size() > 0 ) {
3765       const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3766       const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3767       const OopMapBlock* const last_map = first_map + map_count - 1;
3768       const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3769       if (next_offset == next_nonstatic_field_offset) {
3770         allocation_style = 0;   // allocate oops first
3771         next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3772         next_nonstatic_double_offset = next_nonstatic_oop_offset +
3773                                        (nonstatic_oop_count * heapOopSize);
3774       }
3775     }
3776     if( allocation_style == 2 ) {
3777       allocation_style = 1;     // allocate oops last
3778       next_nonstatic_double_offset = next_nonstatic_field_offset;
3779     }
3780   } else {
3781     ShouldNotReachHere();
3782   }
3783 
3784   int nonstatic_oop_space_count   = 0;
3785   int nonstatic_word_space_count  = 0;
3786   int nonstatic_short_space_count = 0;
3787   int nonstatic_byte_space_count  = 0;
3788   int nonstatic_oop_space_offset = 0;
3789   int nonstatic_word_space_offset = 0;
3790   int nonstatic_short_space_offset = 0;
3791   int nonstatic_byte_space_offset = 0;
3792 
3793   // Try to squeeze some of the fields into the gaps due to
3794   // long/double alignment.
3795   if (nonstatic_double_count > 0) {
3796     int offset = next_nonstatic_double_offset;
3797     next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3798     if (compact_fields && offset != next_nonstatic_double_offset) {
3799       // Allocate available fields into the gap before double field.
3800       int length = next_nonstatic_double_offset - offset;
3801       assert(length == BytesPerInt, "");
3802       nonstatic_word_space_offset = offset;
3803       if (nonstatic_word_count > 0) {
3804         nonstatic_word_count      -= 1;
3805         nonstatic_word_space_count = 1; // Only one will fit
3806         length -= BytesPerInt;
3807         offset += BytesPerInt;
3808       }
3809       nonstatic_short_space_offset = offset;
3810       while (length >= BytesPerShort && nonstatic_short_count > 0) {
3811         nonstatic_short_count       -= 1;
3812         nonstatic_short_space_count += 1;
3813         length -= BytesPerShort;
3814         offset += BytesPerShort;
3815       }
3816       nonstatic_byte_space_offset = offset;
3817       while (length > 0 && nonstatic_byte_count > 0) {
3818         nonstatic_byte_count       -= 1;
3819         nonstatic_byte_space_count += 1;
3820         length -= 1;
3821       }
3822       // Allocate oop field in the gap if there are no other fields for that.
3823       nonstatic_oop_space_offset = offset;
3824       if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3825           allocation_style != 0) { // when oop fields not first
3826         nonstatic_oop_count      -= 1;
3827         nonstatic_oop_space_count = 1; // Only one will fit
3828         length -= heapOopSize;
3829         offset += heapOopSize;
3830       }
3831     }
3832   }
3833 
3834   int next_nonstatic_word_offset = next_nonstatic_double_offset +
3835                                      (nonstatic_double_count * BytesPerLong);
3836   int next_nonstatic_short_offset = next_nonstatic_word_offset +
3837                                       (nonstatic_word_count * BytesPerInt);
3838   int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3839                                      (nonstatic_short_count * BytesPerShort);
3840   int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3841                                        nonstatic_byte_count;
3842 
3843   // let oops jump before padding with this allocation style
3844   if( allocation_style == 1 ) {
3845     next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3846     if( nonstatic_oop_count > 0 ) {
3847       next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3848     }
3849     next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3850   }
3851 
3852   // Iterate over fields again and compute correct offsets.
3853   // The field allocation type was temporarily stored in the offset slot.
3854   // oop fields are located before non-oop fields (static and non-static).
3855   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3856 
3857     // skip already laid out fields
3858     if (fs.is_offset_set()) continue;
3859 
3860     // contended instance fields are handled below
3861     if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3862 
3863     int real_offset = 0;
3864     const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3865 
3866     // pack the rest of the fields
3867     switch (atype) {
3868       case STATIC_OOP:
3869         real_offset = next_static_oop_offset;
3870         next_static_oop_offset += heapOopSize;
3871         break;
3872       case STATIC_BYTE:
3873         real_offset = next_static_byte_offset;
3874         next_static_byte_offset += 1;
3875         break;
3876       case STATIC_SHORT:
3877         real_offset = next_static_short_offset;
3878         next_static_short_offset += BytesPerShort;
3879         break;
3880       case STATIC_WORD:
3881         real_offset = next_static_word_offset;
3882         next_static_word_offset += BytesPerInt;
3883         break;
3884       case STATIC_DOUBLE:
3885         real_offset = next_static_double_offset;
3886         next_static_double_offset += BytesPerLong;
3887         break;
3888       case NONSTATIC_OOP:
3889         if( nonstatic_oop_space_count > 0 ) {
3890           real_offset = nonstatic_oop_space_offset;
3891           nonstatic_oop_space_offset += heapOopSize;
3892           nonstatic_oop_space_count  -= 1;
3893         } else {
3894           real_offset = next_nonstatic_oop_offset;
3895           next_nonstatic_oop_offset += heapOopSize;
3896         }
3897 
3898         // Record this oop in the oop maps
3899         if( nonstatic_oop_map_count > 0 &&
3900             nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3901             real_offset -
3902             int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3903             heapOopSize ) {
3904           // This oop is adjacent to the previous one, add to current oop map
3905           assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3906           nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3907         } else {
3908           // This oop is not adjacent to the previous one, create new oop map
3909           assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3910           nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3911           nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3912           nonstatic_oop_map_count += 1;
3913           if( first_nonstatic_oop_offset == 0 ) { // Undefined
3914             first_nonstatic_oop_offset = real_offset;
3915           }
3916         }
3917         break;
3918       case NONSTATIC_BYTE:
3919         if( nonstatic_byte_space_count > 0 ) {
3920           real_offset = nonstatic_byte_space_offset;
3921           nonstatic_byte_space_offset += 1;
3922           nonstatic_byte_space_count  -= 1;
3923         } else {
3924           real_offset = next_nonstatic_byte_offset;
3925           next_nonstatic_byte_offset += 1;
3926         }
3927         break;
3928       case NONSTATIC_SHORT:
3929         if( nonstatic_short_space_count > 0 ) {
3930           real_offset = nonstatic_short_space_offset;
3931           nonstatic_short_space_offset += BytesPerShort;
3932           nonstatic_short_space_count  -= 1;
3933         } else {
3934           real_offset = next_nonstatic_short_offset;
3935           next_nonstatic_short_offset += BytesPerShort;
3936         }
3937         break;
3938       case NONSTATIC_WORD:
3939         if( nonstatic_word_space_count > 0 ) {
3940           real_offset = nonstatic_word_space_offset;
3941           nonstatic_word_space_offset += BytesPerInt;
3942           nonstatic_word_space_count  -= 1;
3943         } else {
3944           real_offset = next_nonstatic_word_offset;
3945           next_nonstatic_word_offset += BytesPerInt;
3946         }
3947         break;
3948       case NONSTATIC_DOUBLE:
3949         real_offset = next_nonstatic_double_offset;
3950         next_nonstatic_double_offset += BytesPerLong;
3951         break;
3952       default:
3953         ShouldNotReachHere();
3954     }
3955     fs.set_offset(real_offset);
3956   }
3957 
3958 
3959   // Handle the contended cases.
3960   //
3961   // Each contended field should not intersect the cache line with another contended field.
3962   // In the absence of alignment information, we end up with pessimistically separating
3963   // the fields with full-width padding.
3964   //
3965   // Additionally, this should not break alignment for the fields, so we round the alignment up
3966   // for each field.
3967   if (nonstatic_contended_count > 0) {
3968 
3969     // if there is at least one contended field, we need to have pre-padding for them
3970     next_nonstatic_padded_offset += ContendedPaddingWidth;
3971 
3972     // collect all contended groups
3973     ResourceBitMap bm(cp->size());
3974     for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3975       // skip already laid out fields
3976       if (fs.is_offset_set()) continue;
3977 
3978       if (fs.is_contended()) {
3979         bm.set_bit(fs.contended_group());
3980       }
3981     }
3982 
3983     int current_group = -1;
3984     while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3985 
3986       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3987 
3988         // skip already laid out fields
3989         if (fs.is_offset_set()) continue;
3990 
3991         // skip non-contended fields and fields from different group
3992         if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3993 
3994         // handle statics below
3995         if (fs.access_flags().is_static()) continue;
3996 
3997         int real_offset = 0;
3998         FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3999 
4000         switch (atype) {
4001           case NONSTATIC_BYTE:
4002             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4003             real_offset = next_nonstatic_padded_offset;
4004             next_nonstatic_padded_offset += 1;
4005             break;
4006 
4007           case NONSTATIC_SHORT:
4008             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4009             real_offset = next_nonstatic_padded_offset;
4010             next_nonstatic_padded_offset += BytesPerShort;
4011             break;
4012 
4013           case NONSTATIC_WORD:
4014             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4015             real_offset = next_nonstatic_padded_offset;
4016             next_nonstatic_padded_offset += BytesPerInt;
4017             break;
4018 
4019           case NONSTATIC_DOUBLE:
4020             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4021             real_offset = next_nonstatic_padded_offset;
4022             next_nonstatic_padded_offset += BytesPerLong;
4023             break;
4024 
4025           case NONSTATIC_OOP:
4026             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4027             real_offset = next_nonstatic_padded_offset;
4028             next_nonstatic_padded_offset += heapOopSize;
4029 
4030             // Record this oop in the oop maps
4031             if( nonstatic_oop_map_count > 0 &&
4032                 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4033                 real_offset -
4034                 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4035                 heapOopSize ) {
4036               // This oop is adjacent to the previous one, add to current oop map
4037               assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4038               nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4039             } else {
4040               // This oop is not adjacent to the previous one, create new oop map
4041               assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4042               nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4043               nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4044               nonstatic_oop_map_count += 1;
4045               if( first_nonstatic_oop_offset == 0 ) { // Undefined
4046                 first_nonstatic_oop_offset = real_offset;
4047               }
4048             }
4049             break;
4050 
4051           default:
4052             ShouldNotReachHere();
4053         }
4054 
4055         if (fs.contended_group() == 0) {
4056           // Contended group defines the equivalence class over the fields:
4057           // the fields within the same contended group are not inter-padded.
4058           // The only exception is default group, which does not incur the
4059           // equivalence, and so requires intra-padding.
4060           next_nonstatic_padded_offset += ContendedPaddingWidth;
4061         }
4062 
4063         fs.set_offset(real_offset);
4064       } // for
4065 
4066       // Start laying out the next group.
4067       // Note that this will effectively pad the last group in the back;
4068       // this is expected to alleviate memory contention effects for
4069       // subclass fields and/or adjacent object.
4070       // If this was the default group, the padding is already in place.
4071       if (current_group != 0) {
4072         next_nonstatic_padded_offset += ContendedPaddingWidth;
4073       }
4074     }
4075 
4076     // handle static fields
4077   }
4078 
4079   // Entire class is contended, pad in the back.
4080   // This helps to alleviate memory contention effects for subclass fields
4081   // and/or adjacent object.
4082   if (is_contended_class) {
4083     next_nonstatic_padded_offset += ContendedPaddingWidth;
4084   }
4085 
4086   int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4087 
4088   int nonstatic_fields_end      = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4089   int instance_end              = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4090   int static_fields_end         = align_size_up(next_static_byte_offset, wordSize);
4091 
4092   int static_field_size         = (static_fields_end -
4093                                    InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4094   nonstatic_field_size          = nonstatic_field_size +
4095                                   (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4096 
4097   int instance_size             = align_object_size(instance_end / wordSize);
4098 
4099   assert(instance_size == align_object_size(align_size_up(
4100          (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4101           wordSize) / wordSize), "consistent layout helper value");
4102 
4103   // Invariant: nonstatic_field end/start should only change if there are
4104   // nonstatic fields in the class, or if the class is contended. We compare
4105   // against the non-aligned value, so that end alignment will not fail the
4106   // assert without actually having the fields.
4107   assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4108          is_contended_class ||
4109          (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4110 
4111   // Number of non-static oop map blocks allocated at end of klass.
4112   const unsigned int total_oop_map_count =
4113     compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4114                           first_nonstatic_oop_offset);
4115 
4116 #ifndef PRODUCT
4117   if (PrintFieldLayout) {
4118     print_field_layout(_class_name,
4119           _fields,
4120           cp,
4121           instance_size,
4122           nonstatic_fields_start,
4123           nonstatic_fields_end,
4124           static_fields_end);
4125   }
4126 
4127 #endif
4128   // Pass back information needed for InstanceKlass creation
4129   info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4130   info->nonstatic_oop_counts = nonstatic_oop_counts;
4131   info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4132   info->total_oop_map_count = total_oop_map_count;
4133   info->instance_size = instance_size;
4134   info->static_field_size = static_field_size;
4135   info->nonstatic_field_size = nonstatic_field_size;
4136   info->has_nonstatic_fields = has_nonstatic_fields;
4137 }
4138 
4139 static void fill_oop_maps(const InstanceKlass* k,
4140                           unsigned int nonstatic_oop_map_count,
4141                           const int* nonstatic_oop_offsets,
4142                           const unsigned int* nonstatic_oop_counts) {
4143 
4144   assert(k != NULL, "invariant");
4145 
4146   OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4147   const InstanceKlass* const super = k->superklass();
4148   const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4149   if (super_count > 0) {
4150     // Copy maps from superklass
4151     OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4152     for (unsigned int i = 0; i < super_count; ++i) {
4153       *this_oop_map++ = *super_oop_map++;
4154     }
4155   }
4156 
4157   if (nonstatic_oop_map_count > 0) {
4158     if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4159       // The counts differ because there is no gap between superklass's last oop
4160       // field and the first local oop field.  Extend the last oop map copied
4161       // from the superklass instead of creating new one.
4162       nonstatic_oop_map_count--;
4163       nonstatic_oop_offsets++;
4164       this_oop_map--;
4165       this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4166       this_oop_map++;
4167     }
4168 
4169     // Add new map blocks, fill them
4170     while (nonstatic_oop_map_count-- > 0) {
4171       this_oop_map->set_offset(*nonstatic_oop_offsets++);
4172       this_oop_map->set_count(*nonstatic_oop_counts++);
4173       this_oop_map++;
4174     }
4175     assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4176            this_oop_map, "sanity");
4177   }
4178 }
4179 
4180 
4181 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4182   assert(ik != NULL, "invariant");
4183 
4184   const Klass* const super = ik->super();
4185 
4186   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4187   // in which case we don't have to register objects as finalizable
4188   if (!_has_empty_finalizer) {
4189     if (_has_finalizer ||
4190         (super != NULL && super->has_finalizer())) {
4191       ik->set_has_finalizer();
4192     }
4193   }
4194 
4195 #ifdef ASSERT
4196   bool f = false;
4197   const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4198                                            vmSymbols::void_method_signature());
4199   if (m != NULL && !m->is_empty_method()) {
4200       f = true;
4201   }
4202 
4203   // Spec doesn't prevent agent from redefinition of empty finalizer.
4204   // Despite the fact that it's generally bad idea and redefined finalizer
4205   // will not work as expected we shouldn't abort vm in this case
4206   if (!ik->has_redefined_this_or_super()) {
4207     assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4208   }
4209 #endif
4210 
4211   // Check if this klass supports the java.lang.Cloneable interface
4212   if (SystemDictionary::Cloneable_klass_loaded()) {
4213     if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4214       ik->set_is_cloneable();
4215     }
4216   }
4217 
4218   // Check if this klass has a vanilla default constructor
4219   if (super == NULL) {
4220     // java.lang.Object has empty default constructor
4221     ik->set_has_vanilla_constructor();
4222   } else {
4223     if (super->has_vanilla_constructor() &&
4224         _has_vanilla_constructor) {
4225       ik->set_has_vanilla_constructor();
4226     }
4227 #ifdef ASSERT
4228     bool v = false;
4229     if (super->has_vanilla_constructor()) {
4230       const Method* const constructor =
4231         ik->find_method(vmSymbols::object_initializer_name(),
4232                        vmSymbols::void_method_signature());
4233       if (constructor != NULL && constructor->is_vanilla_constructor()) {
4234         v = true;
4235       }
4236     }
4237     assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4238 #endif
4239   }
4240 
4241   // If it cannot be fast-path allocated, set a bit in the layout helper.
4242   // See documentation of InstanceKlass::can_be_fastpath_allocated().
4243   assert(ik->size_helper() > 0, "layout_helper is initialized");
4244   if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4245       || ik->is_abstract() || ik->is_interface()
4246       || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4247       || ik->size_helper() >= FastAllocateSizeLimit) {
4248     // Forbid fast-path allocation.
4249     const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4250     ik->set_layout_helper(lh);
4251   }
4252 }
4253 
4254 // Attach super classes and interface classes to class loader data
4255 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4256                                               TRAPS) {
4257   assert(defined_klass != NULL, "invariant");
4258 
4259   ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4260   if (defining_loader_data->is_the_null_class_loader_data()) {
4261       // Dependencies to null class loader data are implicit.
4262       return;
4263   } else {
4264     // add super class dependency
4265     Klass* const super = defined_klass->super();
4266     if (super != NULL) {
4267       defining_loader_data->record_dependency(super, CHECK);
4268     }
4269 
4270     // add super interface dependencies
4271     const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4272     if (local_interfaces != NULL) {
4273       const int length = local_interfaces->length();
4274       for (int i = 0; i < length; i++) {
4275         defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4276       }
4277     }
4278   }
4279 }
4280 
4281 // utility methods for appending an array with check for duplicates
4282 
4283 static void append_interfaces(GrowableArray<Klass*>* result,
4284                               const Array<Klass*>* const ifs) {
4285   // iterate over new interfaces
4286   for (int i = 0; i < ifs->length(); i++) {
4287     Klass* const e = ifs->at(i);
4288     assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4289     // add new interface
4290     result->append_if_missing(e);
4291   }
4292 }
4293 
4294 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4295                                                     Array<Klass*>* local_ifs,
4296                                                     ClassLoaderData* loader_data,
4297                                                     TRAPS) {
4298   assert(local_ifs != NULL, "invariant");
4299   assert(loader_data != NULL, "invariant");
4300 
4301   // Compute maximum size for transitive interfaces
4302   int max_transitive_size = 0;
4303   int super_size = 0;
4304   // Add superclass transitive interfaces size
4305   if (super != NULL) {
4306     super_size = super->transitive_interfaces()->length();
4307     max_transitive_size += super_size;
4308   }
4309   // Add local interfaces' super interfaces
4310   const int local_size = local_ifs->length();
4311   for (int i = 0; i < local_size; i++) {
4312     Klass* const l = local_ifs->at(i);
4313     max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4314   }
4315   // Finally add local interfaces
4316   max_transitive_size += local_size;
4317   // Construct array
4318   if (max_transitive_size == 0) {
4319     // no interfaces, use canonicalized array
4320     return Universe::the_empty_klass_array();
4321   } else if (max_transitive_size == super_size) {
4322     // no new local interfaces added, share superklass' transitive interface array
4323     return super->transitive_interfaces();
4324   } else if (max_transitive_size == local_size) {
4325     // only local interfaces added, share local interface array
4326     return local_ifs;
4327   } else {
4328     ResourceMark rm;
4329     GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4330 
4331     // Copy down from superclass
4332     if (super != NULL) {
4333       append_interfaces(result, super->transitive_interfaces());
4334     }
4335 
4336     // Copy down from local interfaces' superinterfaces
4337     for (int i = 0; i < local_size; i++) {
4338       Klass* const l = local_ifs->at(i);
4339       append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4340     }
4341     // Finally add local interfaces
4342     append_interfaces(result, local_ifs);
4343 
4344     // length will be less than the max_transitive_size if duplicates were removed
4345     const int length = result->length();
4346     assert(length <= max_transitive_size, "just checking");
4347     Array<Klass*>* const new_result =
4348       MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4349     for (int i = 0; i < length; i++) {
4350       Klass* const e = result->at(i);
4351       assert(e != NULL, "just checking");
4352       new_result->at_put(i, e);
4353     }
4354     return new_result;
4355   }
4356 }
4357 
4358 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4359   assert(this_klass != NULL, "invariant");
4360   const Klass* const super = this_klass->super();
4361   if (super != NULL) {
4362 
4363     // If the loader is not the boot loader then throw an exception if its
4364     // superclass is in package jdk.internal.reflect and its loader is not a
4365     // special reflection class loader
4366     if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4367       assert(super->is_instance_klass(), "super is not instance klass");
4368       PackageEntry* super_package = super->package();
4369       if (super_package != NULL &&
4370           super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4371           !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4372         ResourceMark rm(THREAD);
4373         Exceptions::fthrow(
4374           THREAD_AND_LOCATION,
4375           vmSymbols::java_lang_IllegalAccessError(),
4376           "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4377           this_klass->external_name(),
4378           this_klass->class_loader_data()->loader_name(),
4379           super->external_name());
4380         return;
4381       }
4382     }
4383 
4384     Reflection::VerifyClassAccessResults vca_result =
4385       Reflection::verify_class_access(this_klass, super, false);
4386     if (vca_result != Reflection::ACCESS_OK) {
4387       ResourceMark rm(THREAD);
4388       char* msg =  Reflection::verify_class_access_msg(this_klass, super, vca_result);
4389       if (msg == NULL) {
4390         Exceptions::fthrow(
4391           THREAD_AND_LOCATION,
4392           vmSymbols::java_lang_IllegalAccessError(),
4393           "class %s cannot access its superclass %s",
4394           this_klass->external_name(),
4395           super->external_name());
4396       } else {
4397         // Add additional message content.
4398         Exceptions::fthrow(
4399           THREAD_AND_LOCATION,
4400           vmSymbols::java_lang_IllegalAccessError(),
4401           "superclass access check failed: %s",
4402           msg);
4403       }
4404     }
4405   }
4406 }
4407 
4408 
4409 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4410   assert(this_klass != NULL, "invariant");
4411   const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4412   const int lng = local_interfaces->length();
4413   for (int i = lng - 1; i >= 0; i--) {
4414     Klass* const k = local_interfaces->at(i);
4415     assert (k != NULL && k->is_interface(), "invalid interface");
4416     Reflection::VerifyClassAccessResults vca_result =
4417       Reflection::verify_class_access(this_klass, k, false);
4418     if (vca_result != Reflection::ACCESS_OK) {
4419       ResourceMark rm(THREAD);
4420       char* msg =  Reflection::verify_class_access_msg(this_klass, k, vca_result);
4421       if (msg == NULL) {
4422         Exceptions::fthrow(
4423           THREAD_AND_LOCATION,
4424           vmSymbols::java_lang_IllegalAccessError(),
4425           "class %s cannot access its superinterface %s",
4426           this_klass->external_name(),
4427           k->external_name());
4428       } else {
4429         // Add additional message content.
4430         Exceptions::fthrow(
4431           THREAD_AND_LOCATION,
4432           vmSymbols::java_lang_IllegalAccessError(),
4433           "superinterface check failed: %s",
4434           msg);
4435       }
4436     }
4437   }
4438 }
4439 
4440 
4441 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4442   assert(this_klass != NULL, "invariant");
4443   const Array<Method*>* const methods = this_klass->methods();
4444   const int num_methods = methods->length();
4445 
4446   // go thru each method and check if it overrides a final method
4447   for (int index = 0; index < num_methods; index++) {
4448     const Method* const m = methods->at(index);
4449 
4450     // skip private, static, and <init> methods
4451     if ((!m->is_private() && !m->is_static()) &&
4452         (m->name() != vmSymbols::object_initializer_name())) {
4453 
4454       const Symbol* const name = m->name();
4455       const Symbol* const signature = m->signature();
4456       const Klass* k = this_klass->super();
4457       const Method* super_m = NULL;
4458       while (k != NULL) {
4459         // skip supers that don't have final methods.
4460         if (k->has_final_method()) {
4461           // lookup a matching method in the super class hierarchy
4462           super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4463           if (super_m == NULL) {
4464             break; // didn't find any match; get out
4465           }
4466 
4467           if (super_m->is_final() && !super_m->is_static() &&
4468               // matching method in super is final, and not static
4469               (Reflection::verify_field_access(this_klass,
4470                                                super_m->method_holder(),
4471                                                super_m->method_holder(),
4472                                                super_m->access_flags(), false))
4473             // this class can access super final method and therefore override
4474             ) {
4475             ResourceMark rm(THREAD);
4476             Exceptions::fthrow(
4477               THREAD_AND_LOCATION,
4478               vmSymbols::java_lang_VerifyError(),
4479               "class %s overrides final method %s.%s%s",
4480               this_klass->external_name(),
4481               super_m->method_holder()->external_name(),
4482               name->as_C_string(),
4483               signature->as_C_string()
4484             );
4485             return;
4486           }
4487 
4488           // continue to look from super_m's holder's super.
4489           k = super_m->method_holder()->super();
4490           continue;
4491         }
4492 
4493         k = k->super();
4494       }
4495     }
4496   }
4497 }
4498 
4499 
4500 // assumes that this_klass is an interface
4501 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4502   assert(this_klass != NULL, "invariant");
4503   assert(this_klass->is_interface(), "not an interface");
4504   const Array<Method*>* methods = this_klass->methods();
4505   const int num_methods = methods->length();
4506 
4507   for (int index = 0; index < num_methods; index++) {
4508     const Method* const m = methods->at(index);
4509     // if m is static and not the init method, throw a verify error
4510     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4511       ResourceMark rm(THREAD);
4512       Exceptions::fthrow(
4513         THREAD_AND_LOCATION,
4514         vmSymbols::java_lang_VerifyError(),
4515         "Illegal static method %s in interface %s",
4516         m->name()->as_C_string(),
4517         this_klass->external_name()
4518       );
4519       return;
4520     }
4521   }
4522 }
4523 
4524 // utility methods for format checking
4525 
4526 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4527   if (!_need_verify) { return; }
4528 
4529   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
4530   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
4531   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
4532   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
4533   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
4534   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4535   const bool is_module_info= (flags & JVM_ACC_MODULE)     != 0;
4536   const bool major_gte_15  = _major_version >= JAVA_1_5_VERSION;
4537 
4538   if ((is_abstract && is_final) ||
4539       (is_interface && !is_abstract) ||
4540       (is_interface && major_gte_15 && (is_super || is_enum)) ||
4541       (!is_interface && major_gte_15 && is_annotation) ||
4542       is_module_info) {
4543     ResourceMark rm(THREAD);
4544     Exceptions::fthrow(
4545       THREAD_AND_LOCATION,
4546       vmSymbols::java_lang_ClassFormatError(),
4547       "Illegal class modifiers in class %s: 0x%X",
4548       _class_name->as_C_string(), flags
4549     );
4550     return;
4551   }
4552 }
4553 
4554 static bool has_illegal_visibility(jint flags) {
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 
4559   return ((is_public && is_protected) ||
4560           (is_public && is_private) ||
4561           (is_protected && is_private));
4562 }
4563 
4564 static bool is_supported_version(u2 major, u2 minor){
4565   const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4566   return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4567          (major <= max_version) &&
4568          ((major != max_version) ||
4569           (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4570 }
4571 
4572 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4573                                                    bool is_interface,
4574                                                    TRAPS) const {
4575   if (!_need_verify) { return; }
4576 
4577   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4578   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4579   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4580   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
4581   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
4582   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
4583   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4584   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
4585   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4586 
4587   bool is_illegal = false;
4588 
4589   if (is_interface) {
4590     if (!is_public || !is_static || !is_final || is_private ||
4591         is_protected || is_volatile || is_transient ||
4592         (major_gte_15 && is_enum)) {
4593       is_illegal = true;
4594     }
4595   } else { // not interface
4596     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4597       is_illegal = true;
4598     }
4599   }
4600 
4601   if (is_illegal) {
4602     ResourceMark rm(THREAD);
4603     Exceptions::fthrow(
4604       THREAD_AND_LOCATION,
4605       vmSymbols::java_lang_ClassFormatError(),
4606       "Illegal field modifiers in class %s: 0x%X",
4607       _class_name->as_C_string(), flags);
4608     return;
4609   }
4610 }
4611 
4612 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4613                                                     bool is_interface,
4614                                                     const Symbol* name,
4615                                                     TRAPS) const {
4616   if (!_need_verify) { return; }
4617 
4618   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
4619   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
4620   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
4621   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
4622   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
4623   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
4624   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
4625   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
4626   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4627   const bool is_protected    = (flags & JVM_ACC_PROTECTED)    != 0;
4628   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
4629   const bool major_gte_8     = _major_version >= JAVA_8_VERSION;
4630   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
4631 
4632   bool is_illegal = false;
4633 
4634   if (is_interface) {
4635     if (major_gte_8) {
4636       // Class file version is JAVA_8_VERSION or later Methods of
4637       // interfaces may set any of the flags except ACC_PROTECTED,
4638       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4639       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4640       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4641           (is_native || is_protected || is_final || is_synchronized) ||
4642           // If a specific method of a class or interface has its
4643           // ACC_ABSTRACT flag set, it must not have any of its
4644           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4645           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
4646           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4647           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4648           (is_abstract && (is_private || is_static || is_strict))) {
4649         is_illegal = true;
4650       }
4651     } else if (major_gte_15) {
4652       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4653       if (!is_public || is_private || is_protected || is_static || is_final ||
4654           is_synchronized || is_native || !is_abstract || is_strict) {
4655         is_illegal = true;
4656       }
4657     } else {
4658       // Class file version is pre-JAVA_1_5_VERSION
4659       if (!is_public || is_static || is_final || is_native || !is_abstract) {
4660         is_illegal = true;
4661       }
4662     }
4663   } else { // not interface
4664     if (has_illegal_visibility(flags)) {
4665       is_illegal = true;
4666     } else {
4667       if (is_initializer) {
4668         if (is_static || is_final || is_synchronized || is_native ||
4669             is_abstract || (major_gte_15 && is_bridge)) {
4670           is_illegal = true;
4671         }
4672       } else { // not initializer
4673         if (is_abstract) {
4674           if ((is_final || is_native || is_private || is_static ||
4675               (major_gte_15 && (is_synchronized || is_strict)))) {
4676             is_illegal = true;
4677           }
4678         }
4679       }
4680     }
4681   }
4682 
4683   if (is_illegal) {
4684     ResourceMark rm(THREAD);
4685     Exceptions::fthrow(
4686       THREAD_AND_LOCATION,
4687       vmSymbols::java_lang_ClassFormatError(),
4688       "Method %s in class %s has illegal modifiers: 0x%X",
4689       name->as_C_string(), _class_name->as_C_string(), flags);
4690     return;
4691   }
4692 }
4693 
4694 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4695                                         int length,
4696                                         TRAPS) const {
4697   assert(_need_verify, "only called when _need_verify is true");
4698   if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4699     classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4700   }
4701 }
4702 
4703 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4704 // In class names, '/' separates unqualified names.  This is verified in this function also.
4705 // Method names also may not contain the characters '<' or '>', unless <init>
4706 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
4707 // method.  Because these names have been checked as special cases before
4708 // calling this method in verify_legal_method_name.
4709 //
4710 // This method is also called from the modular system APIs in modules.cpp
4711 // to verify the validity of module and package names.
4712 bool ClassFileParser::verify_unqualified_name(const char* name,
4713                                               unsigned int length,
4714                                               int type) {
4715   for (const char* p = name; p != name + length;) {
4716     jchar ch = *p;
4717     if (ch < 128) {
4718       if (ch == '.' || ch == ';' || ch == '[' ) {
4719         return false;   // do not permit '.', ';', or '['
4720       }
4721       if (ch == '/') {
4722         // check for '//' or leading or trailing '/' which are not legal
4723         // unqualified name must not be empty
4724         if (type == ClassFileParser::LegalClass) {
4725           if (p == name || p+1 >= name+length || *(p+1) == '/') {
4726            return false;
4727           }
4728         } else {
4729           return false;   // do not permit '/' unless it's class name
4730         }
4731       }
4732       if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4733         return false;   // do not permit '<' or '>' in method names
4734       }
4735       p++;
4736     } else {
4737       char* tmp_p = UTF8::next(p, &ch);
4738       p = tmp_p;
4739     }
4740   }
4741   return true;
4742 }
4743 
4744 // Take pointer to a string. Skip over the longest part of the string that could
4745 // be taken as a fieldname. Allow '/' if slash_ok is true.
4746 // Return a pointer to just past the fieldname.
4747 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4748 // being true, we saw consecutive slashes (meaning we were looking for a
4749 // qualified path but found something that was badly-formed).
4750 static const char* skip_over_field_name(const char* name,
4751                                         bool slash_ok,
4752                                         unsigned int length) {
4753   const char* p;
4754   jboolean last_is_slash = false;
4755   jboolean not_first_ch = false;
4756 
4757   for (p = name; p != name + length; not_first_ch = true) {
4758     const char* old_p = p;
4759     jchar ch = *p;
4760     if (ch < 128) {
4761       p++;
4762       // quick check for ascii
4763       if ((ch >= 'a' && ch <= 'z') ||
4764         (ch >= 'A' && ch <= 'Z') ||
4765         (ch == '_' || ch == '$') ||
4766         (not_first_ch && ch >= '0' && ch <= '9')) {
4767         last_is_slash = false;
4768         continue;
4769       }
4770       if (slash_ok && ch == '/') {
4771         if (last_is_slash) {
4772           return NULL;  // Don't permit consecutive slashes
4773         }
4774         last_is_slash = true;
4775         continue;
4776       }
4777     }
4778     else {
4779       jint unicode_ch;
4780       char* tmp_p = UTF8::next_character(p, &unicode_ch);
4781       p = tmp_p;
4782       last_is_slash = false;
4783       // Check if ch is Java identifier start or is Java identifier part
4784       // 4672820: call java.lang.Character methods directly without generating separate tables.
4785       EXCEPTION_MARK;
4786 
4787       // return value
4788       JavaValue result(T_BOOLEAN);
4789       // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4790       JavaCallArguments args;
4791       args.push_int(unicode_ch);
4792 
4793       // public static boolean isJavaIdentifierStart(char ch);
4794       JavaCalls::call_static(&result,
4795         SystemDictionary::Character_klass(),
4796         vmSymbols::isJavaIdentifierStart_name(),
4797         vmSymbols::int_bool_signature(),
4798         &args,
4799         THREAD);
4800 
4801       if (HAS_PENDING_EXCEPTION) {
4802         CLEAR_PENDING_EXCEPTION;
4803         return 0;
4804       }
4805       if (result.get_jboolean()) {
4806         continue;
4807       }
4808 
4809       if (not_first_ch) {
4810         // public static boolean isJavaIdentifierPart(char ch);
4811         JavaCalls::call_static(&result,
4812           SystemDictionary::Character_klass(),
4813           vmSymbols::isJavaIdentifierPart_name(),
4814           vmSymbols::int_bool_signature(),
4815           &args,
4816           THREAD);
4817 
4818         if (HAS_PENDING_EXCEPTION) {
4819           CLEAR_PENDING_EXCEPTION;
4820           return 0;
4821         }
4822 
4823         if (result.get_jboolean()) {
4824           continue;
4825         }
4826       }
4827     }
4828     return (not_first_ch) ? old_p : NULL;
4829   }
4830   return (not_first_ch) ? p : NULL;
4831 }
4832 
4833 // Take pointer to a string. Skip over the longest part of the string that could
4834 // be taken as a field signature. Allow "void" if void_ok.
4835 // Return a pointer to just past the signature.
4836 // Return NULL if no legal signature is found.
4837 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4838                                                        bool void_ok,
4839                                                        unsigned int length,
4840                                                        TRAPS) const {
4841   unsigned int array_dim = 0;
4842   while (length > 0) {
4843     switch (signature[0]) {
4844     case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4845     case JVM_SIGNATURE_BOOLEAN:
4846     case JVM_SIGNATURE_BYTE:
4847     case JVM_SIGNATURE_CHAR:
4848     case JVM_SIGNATURE_SHORT:
4849     case JVM_SIGNATURE_INT:
4850     case JVM_SIGNATURE_FLOAT:
4851     case JVM_SIGNATURE_LONG:
4852     case JVM_SIGNATURE_DOUBLE:
4853       return signature + 1;
4854     case JVM_SIGNATURE_CLASS: {
4855       if (_major_version < JAVA_1_5_VERSION) {
4856         // Skip over the class name if one is there
4857         const char* const p = skip_over_field_name(signature + 1, true, --length);
4858 
4859         // The next character better be a semicolon
4860         if (p && (p - signature) > 1 && p[0] == ';') {
4861           return p + 1;
4862         }
4863       }
4864       else {
4865         // Skip leading 'L' and ignore first appearance of ';'
4866         length--;
4867         signature++;
4868         char* c = strchr((char*) signature, ';');
4869         // Format check signature
4870         if (c != NULL) {
4871           ResourceMark rm(THREAD);
4872           int newlen = c - (char*) signature;
4873           char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
4874           strncpy(sig, signature, newlen);
4875           sig[newlen] = '\0';
4876 
4877           bool legal = verify_unqualified_name(sig, newlen, LegalClass);
4878           if (!legal) {
4879             classfile_parse_error("Class name contains illegal character "
4880                                   "in descriptor in class file %s",
4881                                   CHECK_0);
4882             return NULL;
4883           }
4884           return signature + newlen + 1;
4885         }
4886       }
4887       return NULL;
4888     }
4889     case JVM_SIGNATURE_ARRAY:
4890       array_dim++;
4891       if (array_dim > 255) {
4892         // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4893         classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4894       }
4895       // The rest of what's there better be a legal signature
4896       signature++;
4897       length--;
4898       void_ok = false;
4899       break;
4900     default:
4901       return NULL;
4902     }
4903   }
4904   return NULL;
4905 }
4906 
4907 // Checks if name is a legal class name.
4908 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4909   if (!_need_verify || _relax_verify) { return; }
4910 
4911   char buf[fixed_buffer_size];
4912   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4913   unsigned int length = name->utf8_length();
4914   bool legal = false;
4915 
4916   if (length > 0) {
4917     const char* p;
4918     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4919       p = skip_over_field_signature(bytes, false, length, CHECK);
4920       legal = (p != NULL) && ((p - bytes) == (int)length);
4921     } else if (_major_version < JAVA_1_5_VERSION) {
4922       if (bytes[0] != '<') {
4923         p = skip_over_field_name(bytes, true, length);
4924         legal = (p != NULL) && ((p - bytes) == (int)length);
4925       }
4926     } else {
4927       // 4900761: relax the constraints based on JSR202 spec
4928       // Class names may be drawn from the entire Unicode character set.
4929       // Identifiers between '/' must be unqualified names.
4930       // The utf8 string has been verified when parsing cpool entries.
4931       legal = verify_unqualified_name(bytes, length, LegalClass);
4932     }
4933   }
4934   if (!legal) {
4935     ResourceMark rm(THREAD);
4936     assert(_class_name != NULL, "invariant");
4937     Exceptions::fthrow(
4938       THREAD_AND_LOCATION,
4939       vmSymbols::java_lang_ClassFormatError(),
4940       "Illegal class name \"%s\" in class file %s", bytes,
4941       _class_name->as_C_string()
4942     );
4943     return;
4944   }
4945 }
4946 
4947 // Checks if name is a legal field name.
4948 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4949   if (!_need_verify || _relax_verify) { return; }
4950 
4951   char buf[fixed_buffer_size];
4952   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4953   unsigned int length = name->utf8_length();
4954   bool legal = false;
4955 
4956   if (length > 0) {
4957     if (_major_version < JAVA_1_5_VERSION) {
4958       if (bytes[0] != '<') {
4959         const char* p = skip_over_field_name(bytes, false, length);
4960         legal = (p != NULL) && ((p - bytes) == (int)length);
4961       }
4962     } else {
4963       // 4881221: relax the constraints based on JSR202 spec
4964       legal = verify_unqualified_name(bytes, length, LegalField);
4965     }
4966   }
4967 
4968   if (!legal) {
4969     ResourceMark rm(THREAD);
4970     assert(_class_name != NULL, "invariant");
4971     Exceptions::fthrow(
4972       THREAD_AND_LOCATION,
4973       vmSymbols::java_lang_ClassFormatError(),
4974       "Illegal field name \"%s\" in class %s", bytes,
4975       _class_name->as_C_string()
4976     );
4977     return;
4978   }
4979 }
4980 
4981 // Checks if name is a legal method name.
4982 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4983   if (!_need_verify || _relax_verify) { return; }
4984 
4985   assert(name != NULL, "method name is null");
4986   char buf[fixed_buffer_size];
4987   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4988   unsigned int length = name->utf8_length();
4989   bool legal = false;
4990 
4991   if (length > 0) {
4992     if (bytes[0] == '<') {
4993       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
4994         legal = true;
4995       }
4996     } else if (_major_version < JAVA_1_5_VERSION) {
4997       const char* p;
4998       p = skip_over_field_name(bytes, false, length);
4999       legal = (p != NULL) && ((p - bytes) == (int)length);
5000     } else {
5001       // 4881221: relax the constraints based on JSR202 spec
5002       legal = verify_unqualified_name(bytes, length, LegalMethod);
5003     }
5004   }
5005 
5006   if (!legal) {
5007     ResourceMark rm(THREAD);
5008     assert(_class_name != NULL, "invariant");
5009     Exceptions::fthrow(
5010       THREAD_AND_LOCATION,
5011       vmSymbols::java_lang_ClassFormatError(),
5012       "Illegal method name \"%s\" in class %s", bytes,
5013       _class_name->as_C_string()
5014     );
5015     return;
5016   }
5017 }
5018 
5019 
5020 // Checks if signature is a legal field signature.
5021 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5022                                                    const Symbol* signature,
5023                                                    TRAPS) const {
5024   if (!_need_verify) { return; }
5025 
5026   char buf[fixed_buffer_size];
5027   const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5028   const unsigned int length = signature->utf8_length();
5029   const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5030 
5031   if (p == NULL || (p - bytes) != (int)length) {
5032     throwIllegalSignature("Field", name, signature, CHECK);
5033   }
5034 }
5035 
5036 // Checks if signature is a legal method signature.
5037 // Returns number of parameters
5038 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5039                                                    const Symbol* signature,
5040                                                    TRAPS) const {
5041   if (!_need_verify) {
5042     // make sure caller's args_size will be less than 0 even for non-static
5043     // method so it will be recomputed in compute_size_of_parameters().
5044     return -2;
5045   }
5046 
5047   // Class initializers cannot have args for class format version >= 51.
5048   if (name == vmSymbols::class_initializer_name() &&
5049       signature != vmSymbols::void_method_signature() &&
5050       _major_version >= JAVA_7_VERSION) {
5051     throwIllegalSignature("Method", name, signature, CHECK_0);
5052     return 0;
5053   }
5054 
5055   unsigned int args_size = 0;
5056   char buf[fixed_buffer_size];
5057   const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5058   unsigned int length = signature->utf8_length();
5059   const char* nextp;
5060 
5061   // The first character must be a '('
5062   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5063     length--;
5064     // Skip over legal field signatures
5065     nextp = skip_over_field_signature(p, false, length, CHECK_0);
5066     while ((length > 0) && (nextp != NULL)) {
5067       args_size++;
5068       if (p[0] == 'J' || p[0] == 'D') {
5069         args_size++;
5070       }
5071       length -= nextp - p;
5072       p = nextp;
5073       nextp = skip_over_field_signature(p, false, length, CHECK_0);
5074     }
5075     // The first non-signature thing better be a ')'
5076     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5077       length--;
5078       if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5079         // All internal methods must return void
5080         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5081           return args_size;
5082         }
5083       } else {
5084         // Now we better just have a return value
5085         nextp = skip_over_field_signature(p, true, length, CHECK_0);
5086         if (nextp && ((int)length == (nextp - p))) {
5087           return args_size;
5088         }
5089       }
5090     }
5091   }
5092   // Report error
5093   throwIllegalSignature("Method", name, signature, CHECK_0);
5094   return 0;
5095 }
5096 
5097 int ClassFileParser::static_field_size() const {
5098   assert(_field_info != NULL, "invariant");
5099   return _field_info->static_field_size;
5100 }
5101 
5102 int ClassFileParser::total_oop_map_count() const {
5103   assert(_field_info != NULL, "invariant");
5104   return _field_info->total_oop_map_count;
5105 }
5106 
5107 jint ClassFileParser::layout_size() const {
5108   assert(_field_info != NULL, "invariant");
5109   return _field_info->instance_size;
5110 }
5111 
5112 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5113                                          const Array<Method*>* methods) {
5114   assert(ik != NULL, "invariant");
5115   assert(methods != NULL, "invariant");
5116 
5117   // Set up Method*::intrinsic_id as soon as we know the names of methods.
5118   // (We used to do this lazily, but now we query it in Rewriter,
5119   // which is eagerly done for every method, so we might as well do it now,
5120   // when everything is fresh in memory.)
5121   const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5122 
5123   if (klass_id != vmSymbols::NO_SID) {
5124     for (int j = 0; j < methods->length(); ++j) {
5125       Method* method = methods->at(j);
5126       method->init_intrinsic_id();
5127 
5128       if (CheckIntrinsics) {
5129         // Check if an intrinsic is defined for method 'method',
5130         // but the method is not annotated with @HotSpotIntrinsicCandidate.
5131         if (method->intrinsic_id() != vmIntrinsics::_none &&
5132             !method->intrinsic_candidate()) {
5133               tty->print("Compiler intrinsic is defined for method [%s], "
5134               "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5135               method->name_and_sig_as_C_string(),
5136               NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5137             );
5138           tty->cr();
5139           DEBUG_ONLY(vm_exit(1));
5140         }
5141         // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5142         // but there is no intrinsic available for it.
5143         if (method->intrinsic_candidate() &&
5144           method->intrinsic_id() == vmIntrinsics::_none) {
5145             tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5146               "but no compiler intrinsic is defined for the method.%s",
5147               method->name_and_sig_as_C_string(),
5148               NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5149             );
5150           tty->cr();
5151           DEBUG_ONLY(vm_exit(1));
5152         }
5153       }
5154     } // end for
5155 
5156 #ifdef ASSERT
5157     if (CheckIntrinsics) {
5158       // Check for orphan methods in the current class. A method m
5159       // of a class C is orphan if an intrinsic is defined for method m,
5160       // but class C does not declare m.
5161       // The check is potentially expensive, therefore it is available
5162       // only in debug builds.
5163 
5164       for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5165         if (vmIntrinsics::_compiledLambdaForm == id) {
5166           // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5167           // generated for the JVM from a LambdaForm and therefore no method
5168           // is defined for it.
5169           continue;
5170         }
5171 
5172         if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5173           // Check if the current class contains a method with the same
5174           // name, flags, signature.
5175           bool match = false;
5176           for (int j = 0; j < methods->length(); ++j) {
5177             const Method* method = methods->at(j);
5178             if (method->intrinsic_id() == id) {
5179               match = true;
5180               break;
5181             }
5182           }
5183 
5184           if (!match) {
5185             char buf[1000];
5186             tty->print("Compiler intrinsic is defined for method [%s], "
5187                        "but the method is not available in class [%s].%s",
5188                         vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5189                                                              buf, sizeof(buf)),
5190                         ik->name()->as_C_string(),
5191                         NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5192             );
5193             tty->cr();
5194             DEBUG_ONLY(vm_exit(1));
5195           }
5196         }
5197       } // end for
5198     } // CheckIntrinsics
5199 #endif // ASSERT
5200   }
5201 }
5202 
5203 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5204   if (_klass != NULL) {
5205     return _klass;
5206   }
5207 
5208   InstanceKlass* const ik =
5209     InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5210 
5211   fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5212 
5213   assert(_klass == ik, "invariant");
5214 
5215   ik->set_has_passed_fingerprint_check(false);
5216   if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5217     uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5218     if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5219       // This class matches with a class saved in an AOT library
5220       ik->set_has_passed_fingerprint_check(true);
5221     } else {
5222       ResourceMark rm;
5223       log_info(class, fingerprint)("%s :  expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5224                                  ik->external_name(), aot_fp, _stream->compute_fingerprint());
5225     }
5226   }
5227 
5228   return ik;
5229 }
5230 
5231 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5232   assert(ik != NULL, "invariant");
5233 
5234   set_klass_to_deallocate(ik);
5235 
5236   assert(_field_info != NULL, "invariant");
5237   assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5238   assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5239     "sanity");
5240 
5241   assert(ik->is_instance_klass(), "sanity");
5242   assert(ik->size_helper() == _field_info->instance_size, "sanity");
5243 
5244   // Fill in information already parsed
5245   ik->set_should_verify_class(_need_verify);
5246 
5247   // Not yet: supers are done below to support the new subtype-checking fields
5248   ik->set_class_loader_data(_loader_data);
5249   ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5250   ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5251   assert(_fac != NULL, "invariant");
5252   ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5253 
5254   // this transfers ownership of a lot of arrays from
5255   // the parser onto the InstanceKlass*
5256   apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5257 
5258   // note that is not safe to use the fields in the parser from this point on
5259   assert(NULL == _cp, "invariant");
5260   assert(NULL == _fields, "invariant");
5261   assert(NULL == _methods, "invariant");
5262   assert(NULL == _inner_classes, "invariant");
5263   assert(NULL == _local_interfaces, "invariant");
5264   assert(NULL == _transitive_interfaces, "invariant");
5265   assert(NULL == _combined_annotations, "invariant");
5266 
5267   if (_has_final_method) {
5268     ik->set_has_final_method();
5269   }
5270 
5271   ik->copy_method_ordering(_method_ordering, CHECK);
5272   // The InstanceKlass::_methods_jmethod_ids cache
5273   // is managed on the assumption that the initial cache
5274   // size is equal to the number of methods in the class. If
5275   // that changes, then InstanceKlass::idnum_can_increment()
5276   // has to be changed accordingly.
5277   ik->set_initial_method_idnum(ik->methods()->length());
5278 
5279   ik->set_name(_class_name);
5280 
5281   if (is_anonymous()) {
5282     // I am well known to myself
5283     ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5284   }
5285 
5286   ik->set_minor_version(_minor_version);
5287   ik->set_major_version(_major_version);
5288   ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5289   ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5290 
5291   if (_host_klass != NULL) {
5292     assert (ik->is_anonymous(), "should be the same");
5293     ik->set_host_klass(_host_klass);
5294   }
5295 
5296   // Set PackageEntry for this_klass
5297   oop cl = ik->class_loader();
5298   Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5299   ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5300   ik->set_package(cld, CHECK);
5301 
5302   const Array<Method*>* const methods = ik->methods();
5303   assert(methods != NULL, "invariant");
5304   const int methods_len = methods->length();
5305 
5306   check_methods_for_intrinsics(ik, methods);
5307 
5308   // Fill in field values obtained by parse_classfile_attributes
5309   if (_parsed_annotations->has_any_annotations()) {
5310     _parsed_annotations->apply_to(ik);
5311   }
5312 
5313   apply_parsed_class_attributes(ik);
5314 
5315   // Miranda methods
5316   if ((_num_miranda_methods > 0) ||
5317       // if this class introduced new miranda methods or
5318       (_super_klass != NULL && _super_klass->has_miranda_methods())
5319         // super class exists and this class inherited miranda methods
5320      ) {
5321        ik->set_has_miranda_methods(); // then set a flag
5322   }
5323 
5324   // Fill in information needed to compute superclasses.
5325   ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5326 
5327   // Initialize itable offset tables
5328   klassItable::setup_itable_offset_table(ik);
5329 
5330   // Compute transitive closure of interfaces this class implements
5331   // Do final class setup
5332   fill_oop_maps(ik,
5333                 _field_info->nonstatic_oop_map_count,
5334                 _field_info->nonstatic_oop_offsets,
5335                 _field_info->nonstatic_oop_counts);
5336 
5337   // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5338   set_precomputed_flags(ik);
5339 
5340   // check if this class can access its super class
5341   check_super_class_access(ik, CHECK);
5342 
5343   // check if this class can access its superinterfaces
5344   check_super_interface_access(ik, CHECK);
5345 
5346   // check if this class overrides any final method
5347   check_final_method_override(ik, CHECK);
5348 
5349   // reject static interface methods prior to Java 8
5350   if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5351     check_illegal_static_method(ik, CHECK);
5352   }
5353 
5354   // Obtain this_klass' module entry
5355   ModuleEntry* module_entry = ik->module();
5356   assert(module_entry != NULL, "module_entry should always be set");
5357 
5358   // Obtain java.lang.reflect.Module
5359   Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5360 
5361   // Allocate mirror and initialize static fields
5362   // The create_mirror() call will also call compute_modifiers()
5363   java_lang_Class::create_mirror(ik,
5364                                  _loader_data->class_loader(),
5365                                  module_handle,
5366                                  _protection_domain,
5367                                  CHECK);
5368 
5369   assert(_all_mirandas != NULL, "invariant");
5370 
5371   // Generate any default methods - default methods are public interface methods
5372   // that have a default implementation.  This is new with Java 8.
5373   if (_has_nonstatic_concrete_methods) {
5374     DefaultMethods::generate_default_methods(ik,
5375                                              _all_mirandas,
5376                                              CHECK);
5377   }
5378 
5379   // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5380   if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5381       !module_entry->has_default_read_edges()) {
5382     if (!module_entry->set_has_default_read_edges()) {
5383       // We won a potential race
5384       JvmtiExport::add_default_read_edges(module_handle, THREAD);
5385     }
5386   }
5387 
5388   // Update the loader_data graph.
5389   record_defined_class_dependencies(ik, CHECK);
5390 
5391   ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5392 
5393   if (!is_internal()) {
5394     if (log_is_enabled(Info, class, load)) {
5395       ResourceMark rm;
5396       const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5397 
5398       if (log_is_enabled(Info, class, load)) {
5399         ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream);
5400       }
5401       // No 'else' here as logging levels are not mutually exclusive
5402       if (log_is_enabled(Debug, class, load)) {
5403         ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream);
5404       }
5405     }
5406 
5407     if (log_is_enabled(Debug, class, resolve))  {
5408       ResourceMark rm;
5409       // print out the superclass.
5410       const char * from = ik->external_name();
5411       if (ik->java_super() != NULL) {
5412         log_debug(class, resolve)("%s %s (super)",
5413                    from,
5414                    ik->java_super()->external_name());
5415       }
5416       // print out each of the interface classes referred to by this class.
5417       const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5418       if (local_interfaces != NULL) {
5419         const int length = local_interfaces->length();
5420         for (int i = 0; i < length; i++) {
5421           const Klass* const k = local_interfaces->at(i);
5422           const char * to = k->external_name();
5423           log_debug(class, resolve)("%s %s (interface)", from, to);
5424         }
5425       }
5426     }
5427   }
5428 
5429   TRACE_INIT_ID(ik);
5430 
5431   // If we reach here, all is well.
5432   // Now remove the InstanceKlass* from the _klass_to_deallocate field
5433   // in order for it to not be destroyed in the ClassFileParser destructor.
5434   set_klass_to_deallocate(NULL);
5435 
5436   // it's official
5437   set_klass(ik);
5438 
5439   debug_only(ik->verify();)
5440 }
5441 
5442 // For an anonymous class that is in the unnamed package, move it to its host class's
5443 // package by prepending its host class's package name to its class name and setting
5444 // its _class_name field.
5445 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5446   ResourceMark rm(THREAD);
5447   assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5448          "Anonymous class should not be in a package");
5449   const char* host_pkg_name =
5450     ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5451 
5452   if (host_pkg_name != NULL) {
5453     size_t host_pkg_len = strlen(host_pkg_name);
5454     int class_name_len = _class_name->utf8_length();
5455     char* new_anon_name =
5456       NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5457     // Copy host package name and trailing /.
5458     strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5459     new_anon_name[host_pkg_len] = '/';
5460     // Append anonymous class name. The anonymous class name can contain odd
5461     // characters.  So, do a strncpy instead of using sprintf("%s...").
5462     strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5463 
5464     // Create a symbol and update the anonymous class name.
5465     _class_name = SymbolTable::new_symbol(new_anon_name,
5466                                           (int)host_pkg_len + 1 + class_name_len,
5467                                           CHECK);
5468   }
5469 }
5470 
5471 // If the host class and the anonymous class are in the same package then do
5472 // nothing.  If the anonymous class is in the unnamed package then move it to its
5473 // host's package.  If the classes are in different packages then throw an IAE
5474 // exception.
5475 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5476   assert(_host_klass != NULL, "Expected an anonymous class");
5477 
5478   const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5479                                                _class_name->utf8_length(), '/');
5480   if (anon_last_slash == NULL) {  // Unnamed package
5481     prepend_host_package_name(_host_klass, CHECK);
5482   } else {
5483     if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(),
5484                                               _host_klass->name(),
5485                                               _host_klass->class_loader(),
5486                                               _class_name)) {
5487       ResourceMark rm(THREAD);
5488       THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5489         err_msg("Host class %s and anonymous class %s are in different packages",
5490         _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5491     }
5492   }
5493 }
5494 
5495 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5496   bool trusted = (loader_data->is_the_null_class_loader_data() ||
5497                   SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5498   bool need_verify =
5499     // verifyAll
5500     (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5501     // verifyRemote
5502     (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5503   return !need_verify;
5504 }
5505 
5506 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5507                                  Symbol* name,
5508                                  ClassLoaderData* loader_data,
5509                                  Handle protection_domain,
5510                                  const InstanceKlass* host_klass,
5511                                  GrowableArray<Handle>* cp_patches,
5512                                  Publicity pub_level,
5513                                  TRAPS) :
5514   _stream(stream),
5515   _requested_name(name),
5516   _loader_data(loader_data),
5517   _host_klass(host_klass),
5518   _cp_patches(cp_patches),
5519   _super_klass(),
5520   _cp(NULL),
5521   _fields(NULL),
5522   _methods(NULL),
5523   _inner_classes(NULL),
5524   _local_interfaces(NULL),
5525   _transitive_interfaces(NULL),
5526   _combined_annotations(NULL),
5527   _annotations(NULL),
5528   _type_annotations(NULL),
5529   _fields_annotations(NULL),
5530   _fields_type_annotations(NULL),
5531   _klass(NULL),
5532   _klass_to_deallocate(NULL),
5533   _parsed_annotations(NULL),
5534   _fac(NULL),
5535   _field_info(NULL),
5536   _method_ordering(NULL),
5537   _all_mirandas(NULL),
5538   _vtable_size(0),
5539   _itable_size(0),
5540   _num_miranda_methods(0),
5541   _rt(REF_NONE),
5542   _protection_domain(protection_domain),
5543   _access_flags(),
5544   _pub_level(pub_level),
5545   _synthetic_flag(false),
5546   _sde_length(false),
5547   _sde_buffer(NULL),
5548   _sourcefile_index(0),
5549   _generic_signature_index(0),
5550   _major_version(0),
5551   _minor_version(0),
5552   _this_class_index(0),
5553   _super_class_index(0),
5554   _itfs_len(0),
5555   _java_fields_count(0),
5556   _need_verify(false),
5557   _relax_verify(false),
5558   _has_nonstatic_concrete_methods(false),
5559   _declares_nonstatic_concrete_methods(false),
5560   _has_final_method(false),
5561   _has_finalizer(false),
5562   _has_empty_finalizer(false),
5563   _has_vanilla_constructor(false),
5564   _max_bootstrap_specifier_index(-1) {
5565 
5566   _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5567 
5568   assert(THREAD->is_Java_thread(), "invariant");
5569   assert(_loader_data != NULL, "invariant");
5570   assert(stream != NULL, "invariant");
5571   assert(_stream != NULL, "invariant");
5572   assert(_stream->buffer() == _stream->current(), "invariant");
5573   assert(_class_name != NULL, "invariant");
5574   assert(0 == _access_flags.as_int(), "invariant");
5575 
5576   // Figure out whether we can skip format checking (matching classic VM behavior)
5577   if (DumpSharedSpaces) {
5578     // verify == true means it's a 'remote' class (i.e., non-boot class)
5579     // Verification decision is based on BytecodeVerificationRemote flag
5580     // for those classes.
5581     _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5582                                               BytecodeVerificationLocal;
5583   }
5584   else {
5585     _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5586                                                stream->need_verify());
5587   }
5588 
5589   // synch back verification state to stream
5590   stream->set_verify(_need_verify);
5591 
5592   // Check if verification needs to be relaxed for this class file
5593   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5594   _relax_verify = relax_format_check_for(_loader_data);
5595 
5596   parse_stream(stream, CHECK);
5597 
5598   post_process_parsed_stream(stream, _cp, CHECK);
5599 }
5600 
5601 void ClassFileParser::clear_class_metadata() {
5602   // metadata created before the instance klass is created.  Must be
5603   // deallocated if classfile parsing returns an error.
5604   _cp = NULL;
5605   _fields = NULL;
5606   _methods = NULL;
5607   _inner_classes = NULL;
5608   _local_interfaces = NULL;
5609   _transitive_interfaces = NULL;
5610   _combined_annotations = NULL;
5611   _annotations = _type_annotations = NULL;
5612   _fields_annotations = _fields_type_annotations = NULL;
5613 }
5614 
5615 // Destructor to clean up
5616 ClassFileParser::~ClassFileParser() {
5617   if (_cp != NULL) {
5618     MetadataFactory::free_metadata(_loader_data, _cp);
5619   }
5620   if (_fields != NULL) {
5621     MetadataFactory::free_array<u2>(_loader_data, _fields);
5622   }
5623 
5624   if (_methods != NULL) {
5625     // Free methods
5626     InstanceKlass::deallocate_methods(_loader_data, _methods);
5627   }
5628 
5629   // beware of the Universe::empty_blah_array!!
5630   if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5631     MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5632   }
5633 
5634   // Free interfaces
5635   InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5636                                        _local_interfaces, _transitive_interfaces);
5637 
5638   if (_combined_annotations != NULL) {
5639     // After all annotations arrays have been created, they are installed into the
5640     // Annotations object that will be assigned to the InstanceKlass being created.
5641 
5642     // Deallocate the Annotations object and the installed annotations arrays.
5643     _combined_annotations->deallocate_contents(_loader_data);
5644 
5645     // If the _combined_annotations pointer is non-NULL,
5646     // then the other annotations fields should have been cleared.
5647     assert(_annotations             == NULL, "Should have been cleared");
5648     assert(_type_annotations        == NULL, "Should have been cleared");
5649     assert(_fields_annotations      == NULL, "Should have been cleared");
5650     assert(_fields_type_annotations == NULL, "Should have been cleared");
5651   } else {
5652     // If the annotations arrays were not installed into the Annotations object,
5653     // then they have to be deallocated explicitly.
5654     MetadataFactory::free_array<u1>(_loader_data, _annotations);
5655     MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5656     Annotations::free_contents(_loader_data, _fields_annotations);
5657     Annotations::free_contents(_loader_data, _fields_type_annotations);
5658   }
5659 
5660   clear_class_metadata();
5661 
5662   // deallocate the klass if already created.  Don't directly deallocate, but add
5663   // to the deallocate list so that the klass is removed from the CLD::_klasses list
5664   // at a safepoint.
5665   if (_klass_to_deallocate != NULL) {
5666     _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5667   }
5668 }
5669 
5670 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5671                                    TRAPS) {
5672 
5673   assert(stream != NULL, "invariant");
5674   assert(_class_name != NULL, "invariant");
5675 
5676   // BEGIN STREAM PARSING
5677   stream->guarantee_more(8, CHECK);  // magic, major, minor
5678   // Magic value
5679   const u4 magic = stream->get_u4_fast();
5680   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5681                      "Incompatible magic value %u in class file %s",
5682                      magic, CHECK);
5683 
5684   // Version numbers
5685   _minor_version = stream->get_u2_fast();
5686   _major_version = stream->get_u2_fast();
5687 
5688   if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5689     ResourceMark rm;
5690     warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5691             _major_version,  _minor_version, _class_name->as_C_string());
5692     Exceptions::fthrow(
5693       THREAD_AND_LOCATION,
5694       vmSymbols::java_lang_UnsupportedClassVersionError(),
5695       "Unsupported major.minor version for dump time %u.%u",
5696       _major_version,
5697       _minor_version);
5698   }
5699 
5700   // Check version numbers - we check this even with verifier off
5701   if (!is_supported_version(_major_version, _minor_version)) {
5702     ResourceMark rm(THREAD);
5703     Exceptions::fthrow(
5704       THREAD_AND_LOCATION,
5705       vmSymbols::java_lang_UnsupportedClassVersionError(),
5706       "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5707       "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5708       _class_name->as_C_string(),
5709       _major_version,
5710       _minor_version,
5711       JAVA_MAX_SUPPORTED_VERSION,
5712       JAVA_MAX_SUPPORTED_MINOR_VERSION);
5713     return;
5714   }
5715 
5716   stream->guarantee_more(3, CHECK); // length, first cp tag
5717   const u2 cp_size = stream->get_u2_fast();
5718 
5719   guarantee_property(
5720     cp_size >= 1, "Illegal constant pool size %u in class file %s",
5721     cp_size, CHECK);
5722 
5723   _cp = ConstantPool::allocate(_loader_data,
5724                                cp_size,
5725                                CHECK);
5726 
5727   ConstantPool* const cp = _cp;
5728 
5729   parse_constant_pool(stream, cp, cp_size, CHECK);
5730 
5731   assert(cp_size == (const u2)cp->length(), "invariant");
5732 
5733   // ACCESS FLAGS
5734   stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
5735 
5736   // Access flags
5737   jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5738 
5739   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5740     // Set abstract bit for old class files for backward compatibility
5741     flags |= JVM_ACC_ABSTRACT;
5742   }
5743 
5744   _access_flags.set_flags(flags);
5745 
5746   verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK);
5747 
5748   // This class and superclass
5749   _this_class_index = stream->get_u2_fast();
5750   check_property(
5751     valid_cp_range(_this_class_index, cp_size) &&
5752       cp->tag_at(_this_class_index).is_unresolved_klass(),
5753     "Invalid this class index %u in constant pool in class file %s",
5754     _this_class_index, CHECK);
5755 
5756   Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5757   assert(class_name_in_cp != NULL, "class_name can't be null");
5758 
5759   // Update _class_name which could be null previously
5760   // to reflect the name in the constant pool
5761   _class_name = class_name_in_cp;
5762 
5763   // Don't need to check whether this class name is legal or not.
5764   // It has been checked when constant pool is parsed.
5765   // However, make sure it is not an array type.
5766   if (_need_verify) {
5767     guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5768                        "Bad class name in class file %s",
5769                        CHECK);
5770   }
5771 
5772   // Checks if name in class file matches requested name
5773   if (_requested_name != NULL && _requested_name != _class_name) {
5774     ResourceMark rm(THREAD);
5775     Exceptions::fthrow(
5776       THREAD_AND_LOCATION,
5777       vmSymbols::java_lang_NoClassDefFoundError(),
5778       "%s (wrong name: %s)",
5779       _class_name->as_C_string(),
5780       _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5781     );
5782     return;
5783   }
5784 
5785   // if this is an anonymous class fix up its name if it's in the unnamed
5786   // package.  Otherwise, throw IAE if it is in a different package than
5787   // its host class.
5788   if (_host_klass != NULL) {
5789     fix_anonymous_class_name(CHECK);
5790   }
5791 
5792   // Verification prevents us from creating names with dots in them, this
5793   // asserts that that's the case.
5794   assert(is_internal_format(_class_name), "external class name format used internally");
5795 
5796   if (!is_internal()) {
5797     if (log_is_enabled(Debug, class, preorder)){
5798       ResourceMark rm(THREAD);
5799       outputStream* log = Log(class, preorder)::debug_stream();
5800       log->print("%s", _class_name->as_klass_external_name());
5801       if (stream->source() != NULL) {
5802         log->print(" source: %s", stream->source());
5803       }
5804       log->cr();
5805     }
5806 
5807 #if INCLUDE_CDS
5808     if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5809       // Only dump the classes that can be stored into CDS archive.
5810       // Anonymous classes such as generated LambdaForm classes are also not included.
5811       if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5812           _host_klass == NULL) {
5813         oop class_loader = _loader_data->class_loader();
5814         ResourceMark rm(THREAD);
5815         // For the boot and platform class loaders, check if the class is not found in the
5816         // java runtime image. Additional check for the boot class loader is if the class
5817         // is not found in the boot loader's appended entries. This indicates that the class
5818         // is not useable during run time, such as the ones found in the --patch-module entries,
5819         // so it should not be included in the classlist file.
5820         if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
5821              SystemDictionary::is_platform_class_loader(class_loader)) &&
5822             !ClassLoader::is_jrt(stream->source())) {
5823           tty->print_cr("skip writing class %s from source %s to classlist file",
5824             _class_name->as_C_string(), stream->source());
5825         } else {
5826           classlist_file->print_cr("%s", _class_name->as_C_string());
5827           classlist_file->flush();
5828         }
5829       }
5830     }
5831 #endif
5832   }
5833 
5834   // SUPERKLASS
5835   _super_class_index = stream->get_u2_fast();
5836   _super_klass = parse_super_class(cp,
5837                                    _super_class_index,
5838                                    _need_verify,
5839                                    CHECK);
5840 
5841   // Interfaces
5842   _itfs_len = stream->get_u2_fast();
5843   parse_interfaces(stream,
5844                    _itfs_len,
5845                    cp,
5846                    &_has_nonstatic_concrete_methods,
5847                    CHECK);
5848 
5849   assert(_local_interfaces != NULL, "invariant");
5850 
5851   // Fields (offsets are filled in later)
5852   _fac = new FieldAllocationCount();
5853   parse_fields(stream,
5854                _access_flags.is_interface(),
5855                _fac,
5856                cp,
5857                cp_size,
5858                &_java_fields_count,
5859                CHECK);
5860 
5861   assert(_fields != NULL, "invariant");
5862 
5863   // Methods
5864   AccessFlags promoted_flags;
5865   parse_methods(stream,
5866                 _access_flags.is_interface(),
5867                 &promoted_flags,
5868                 &_has_final_method,
5869                 &_declares_nonstatic_concrete_methods,
5870                 CHECK);
5871 
5872   assert(_methods != NULL, "invariant");
5873 
5874   // promote flags from parse_methods() to the klass' flags
5875   _access_flags.add_promoted_flags(promoted_flags.as_int());
5876 
5877   if (_declares_nonstatic_concrete_methods) {
5878     _has_nonstatic_concrete_methods = true;
5879   }
5880 
5881   // Additional attributes/annotations
5882   _parsed_annotations = new ClassAnnotationCollector();
5883   parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5884 
5885   assert(_inner_classes != NULL, "invariant");
5886 
5887   // Finalize the Annotations metadata object,
5888   // now that all annotation arrays have been created.
5889   create_combined_annotations(CHECK);
5890 
5891   // Make sure this is the end of class file stream
5892   guarantee_property(stream->at_eos(),
5893                      "Extra bytes at the end of class file %s",
5894                      CHECK);
5895 
5896   // all bytes in stream read and parsed
5897 }
5898 
5899 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5900                                                  ConstantPool* cp,
5901                                                  TRAPS) {
5902   assert(stream != NULL, "invariant");
5903   assert(stream->at_eos(), "invariant");
5904   assert(cp != NULL, "invariant");
5905   assert(_loader_data != NULL, "invariant");
5906 
5907   if (_class_name == vmSymbols::java_lang_Object()) {
5908     check_property(_local_interfaces == Universe::the_empty_klass_array(),
5909                    "java.lang.Object cannot implement an interface in class file %s",
5910                    CHECK);
5911   }
5912   // We check super class after class file is parsed and format is checked
5913   if (_super_class_index > 0 && NULL ==_super_klass) {
5914     Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5915     if (_access_flags.is_interface()) {
5916       // Before attempting to resolve the superclass, check for class format
5917       // errors not checked yet.
5918       guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5919         "Interfaces must have java.lang.Object as superclass in class file %s",
5920         CHECK);
5921     }
5922     _super_klass = (const InstanceKlass*)
5923                        SystemDictionary::resolve_super_or_fail(_class_name,
5924                                                                super_class_name,
5925                                                                _loader_data->class_loader(),
5926                                                                _protection_domain,
5927                                                                true,
5928                                                                CHECK);
5929   }
5930 
5931   if (_super_klass != NULL) {
5932     if (_super_klass->has_nonstatic_concrete_methods()) {
5933       _has_nonstatic_concrete_methods = true;
5934     }
5935 
5936     if (_super_klass->is_interface()) {
5937       ResourceMark rm(THREAD);
5938       Exceptions::fthrow(
5939         THREAD_AND_LOCATION,
5940         vmSymbols::java_lang_IncompatibleClassChangeError(),
5941         "class %s has interface %s as super class",
5942         _class_name->as_klass_external_name(),
5943         _super_klass->external_name()
5944       );
5945       return;
5946     }
5947     // Make sure super class is not final
5948     if (_super_klass->is_final()) {
5949       THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5950     }
5951   }
5952 
5953   // Compute the transitive list of all unique interfaces implemented by this class
5954   _transitive_interfaces =
5955     compute_transitive_interfaces(_super_klass,
5956                                   _local_interfaces,
5957                                   _loader_data,
5958                                   CHECK);
5959 
5960   assert(_transitive_interfaces != NULL, "invariant");
5961 
5962   // sort methods
5963   _method_ordering = sort_methods(_methods);
5964 
5965   _all_mirandas = new GrowableArray<Method*>(20);
5966 
5967   klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5968                                                     &_num_miranda_methods,
5969                                                     _all_mirandas,
5970                                                     _super_klass,
5971                                                     _methods,
5972                                                     _access_flags,
5973                                                     _major_version,
5974                                                     _loader_data->class_loader(),
5975                                                     _class_name,
5976                                                     _local_interfaces,
5977                                                     CHECK);
5978 
5979   // Size of Java itable (in words)
5980   _itable_size = _access_flags.is_interface() ? 0 :
5981     klassItable::compute_itable_size(_transitive_interfaces);
5982 
5983   assert(_fac != NULL, "invariant");
5984   assert(_parsed_annotations != NULL, "invariant");
5985 
5986   _field_info = new FieldLayoutInfo();
5987   layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
5988 
5989   // Compute reference typ
5990   _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
5991 
5992 }
5993 
5994 void ClassFileParser::set_klass(InstanceKlass* klass) {
5995 
5996 #ifdef ASSERT
5997   if (klass != NULL) {
5998     assert(NULL == _klass, "leaking?");
5999   }
6000 #endif
6001 
6002   _klass = klass;
6003 }
6004 
6005 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6006 
6007 #ifdef ASSERT
6008   if (klass != NULL) {
6009     assert(NULL == _klass_to_deallocate, "leaking?");
6010   }
6011 #endif
6012 
6013   _klass_to_deallocate = klass;
6014 }
6015 
6016 // Caller responsible for ResourceMark
6017 // clone stream with rewound position
6018 const ClassFileStream* ClassFileParser::clone_stream() const {
6019   assert(_stream != NULL, "invariant");
6020 
6021   return _stream->clone();
6022 }
6023 // ----------------------------------------------------------------------------
6024 // debugging
6025 
6026 #ifdef ASSERT
6027 
6028 // return true if class_name contains no '.' (internal format is '/')
6029 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6030   if (class_name != NULL) {
6031     ResourceMark rm;
6032     char* name = class_name->as_C_string();
6033     return strchr(name, '.') == NULL;
6034   } else {
6035     return true;
6036   }
6037 }
6038 
6039 #endif