1 /*
   2  * Copyright (c) 1997, 2017, 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       Klass* 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 = 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         interf = SystemDictionary::resolve_super_or_fail(
 835                                                   _class_name,
 836                                                   unresolved_klass,
 837                                                   Handle(THREAD, _loader_data->class_loader()),
 838                                                   _protection_domain,
 839                                                   false,
 840                                                   CHECK);

 841       }
 842 
 843       if (!interf->is_interface()) {
 844         THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
 845                    "Implementing class");
 846       }
 847 
 848       if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
 849         *has_nonstatic_concrete_methods = true;
 850       }
 851       _local_interfaces->at_put(index, interf);
 852     }
 853 
 854     if (!_need_verify || itfs_len <= 1) {
 855       return;
 856     }
 857 
 858     // Check if there's any duplicates in interfaces
 859     ResourceMark rm(THREAD);
 860     NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
 861                                                                  NameSigHash*,
 862                                                                  HASH_ROW_SIZE);
 863     initialize_hashtable(interface_names);
 864     bool dup = false;
 865     const Symbol* name = NULL;
 866     {
 867       debug_only(NoSafepointVerifier nsv;)
 868       for (index = 0; index < itfs_len; index++) {
 869         const Klass* const k = _local_interfaces->at(index);
 870         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 \"%s\" in class file %s",
 880                              name->as_C_string(), CHECK);
 881     }
 882   }
 883 }
 884 
 885 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
 886                                            int constantvalue_index,
 887                                            int signature_index,
 888                                            TRAPS) const {
 889   // Make sure the constant pool entry is of a type appropriate to this field
 890   guarantee_property(
 891     (constantvalue_index > 0 &&
 892       constantvalue_index < cp->length()),
 893     "Bad initial value index %u in ConstantValue attribute in class file %s",
 894     constantvalue_index, CHECK);
 895 
 896   const constantTag value_type = cp->tag_at(constantvalue_index);
 897   switch(cp->basic_type_for_signature_at(signature_index)) {
 898     case T_LONG: {
 899       guarantee_property(value_type.is_long(),
 900                          "Inconsistent constant value type in class file %s",
 901                          CHECK);
 902       break;
 903     }
 904     case T_FLOAT: {
 905       guarantee_property(value_type.is_float(),
 906                          "Inconsistent constant value type in class file %s",
 907                          CHECK);
 908       break;
 909     }
 910     case T_DOUBLE: {
 911       guarantee_property(value_type.is_double(),
 912                          "Inconsistent constant value type in class file %s",
 913                          CHECK);
 914       break;
 915     }
 916     case T_BYTE:
 917     case T_CHAR:
 918     case T_SHORT:
 919     case T_BOOLEAN:
 920     case T_INT: {
 921       guarantee_property(value_type.is_int(),
 922                          "Inconsistent constant value type in class file %s",
 923                          CHECK);
 924       break;
 925     }
 926     case T_OBJECT: {
 927       guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
 928                          && value_type.is_string()),
 929                          "Bad string initial value in class file %s",
 930                          CHECK);
 931       break;
 932     }
 933     default: {
 934       classfile_parse_error("Unable to set initial value %u in class file %s",
 935                              constantvalue_index,
 936                              CHECK);
 937     }
 938   }
 939 }
 940 
 941 class AnnotationCollector : public ResourceObj{
 942 public:
 943   enum Location { _in_field, _in_method, _in_class };
 944   enum ID {
 945     _unknown = 0,
 946     _method_CallerSensitive,
 947     _method_ForceInline,
 948     _method_DontInline,
 949     _method_InjectedProfile,
 950     _method_LambdaForm_Compiled,
 951     _method_LambdaForm_Hidden,
 952     _method_HotSpotIntrinsicCandidate,
 953     _jdk_internal_vm_annotation_Contended,
 954     _field_Stable,
 955     _jdk_internal_vm_annotation_ReservedStackAccess,
 956     _annotation_LIMIT
 957   };
 958   const Location _location;
 959   int _annotations_present;
 960   u2 _contended_group;
 961 
 962   AnnotationCollector(Location location)
 963     : _location(location), _annotations_present(0)
 964   {
 965     assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
 966   }
 967   // If this annotation name has an ID, report it (or _none).
 968   ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
 969   // Set the annotation name:
 970   void set_annotation(ID id) {
 971     assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
 972     _annotations_present |= nth_bit((int)id);
 973   }
 974 
 975   void remove_annotation(ID id) {
 976     assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
 977     _annotations_present &= ~nth_bit((int)id);
 978   }
 979 
 980   // Report if the annotation is present.
 981   bool has_any_annotations() const { return _annotations_present != 0; }
 982   bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
 983 
 984   void set_contended_group(u2 group) { _contended_group = group; }
 985   u2 contended_group() const { return _contended_group; }
 986 
 987   bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
 988 
 989   void set_stable(bool stable) { set_annotation(_field_Stable); }
 990   bool is_stable() const { return has_annotation(_field_Stable); }
 991 };
 992 
 993 // This class also doubles as a holder for metadata cleanup.
 994 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
 995 private:
 996   ClassLoaderData* _loader_data;
 997   AnnotationArray* _field_annotations;
 998   AnnotationArray* _field_type_annotations;
 999 public:
1000   FieldAnnotationCollector(ClassLoaderData* loader_data) :
1001     AnnotationCollector(_in_field),
1002     _loader_data(loader_data),
1003     _field_annotations(NULL),
1004     _field_type_annotations(NULL) {}
1005   ~FieldAnnotationCollector();
1006   void apply_to(FieldInfo* f);
1007   AnnotationArray* field_annotations()      { return _field_annotations; }
1008   AnnotationArray* field_type_annotations() { return _field_type_annotations; }
1009 
1010   void set_field_annotations(AnnotationArray* a)      { _field_annotations = a; }
1011   void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
1012 };
1013 
1014 class MethodAnnotationCollector : public AnnotationCollector{
1015 public:
1016   MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
1017   void apply_to(methodHandle m);
1018 };
1019 
1020 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
1021 public:
1022   ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
1023   void apply_to(InstanceKlass* ik);
1024 };
1025 
1026 
1027 static int skip_annotation_value(const u1*, int, int); // fwd decl
1028 
1029 // Safely increment index by val if does not pass limit
1030 #define SAFE_ADD(index, limit, val) \
1031 if (index >= limit - val) return limit; \
1032 index += val;
1033 
1034 // Skip an annotation.  Return >=limit if there is any problem.
1035 static int skip_annotation(const u1* buffer, int limit, int index) {
1036   assert(buffer != NULL, "invariant");
1037   // annotation := atype:u2 do(nmem:u2) {member:u2 value}
1038   // value := switch (tag:u1) { ... }
1039   SAFE_ADD(index, limit, 4); // skip atype and read nmem
1040   int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
1041   while (--nmem >= 0 && index < limit) {
1042     SAFE_ADD(index, limit, 2); // skip member
1043     index = skip_annotation_value(buffer, limit, index);
1044   }
1045   return index;
1046 }
1047 
1048 // Skip an annotation value.  Return >=limit if there is any problem.
1049 static int skip_annotation_value(const u1* buffer, int limit, int index) {
1050   assert(buffer != NULL, "invariant");
1051 
1052   // value := switch (tag:u1) {
1053   //   case B, C, I, S, Z, D, F, J, c: con:u2;
1054   //   case e: e_class:u2 e_name:u2;
1055   //   case s: s_con:u2;
1056   //   case [: do(nval:u2) {value};
1057   //   case @: annotation;
1058   //   case s: s_con:u2;
1059   // }
1060   SAFE_ADD(index, limit, 1); // read tag
1061   const u1 tag = buffer[index - 1];
1062   switch (tag) {
1063     case 'B':
1064     case 'C':
1065     case 'I':
1066     case 'S':
1067     case 'Z':
1068     case 'D':
1069     case 'F':
1070     case 'J':
1071     case 'c':
1072     case 's':
1073       SAFE_ADD(index, limit, 2);  // skip con or s_con
1074       break;
1075     case 'e':
1076       SAFE_ADD(index, limit, 4);  // skip e_class, e_name
1077       break;
1078     case '[':
1079     {
1080       SAFE_ADD(index, limit, 2); // read nval
1081       int nval = Bytes::get_Java_u2((address)buffer + index - 2);
1082       while (--nval >= 0 && index < limit) {
1083         index = skip_annotation_value(buffer, limit, index);
1084       }
1085     }
1086     break;
1087     case '@':
1088       index = skip_annotation(buffer, limit, index);
1089       break;
1090     default:
1091       return limit;  //  bad tag byte
1092   }
1093   return index;
1094 }
1095 
1096 // Sift through annotations, looking for those significant to the VM:
1097 static void parse_annotations(const ConstantPool* const cp,
1098                               const u1* buffer, int limit,
1099                               AnnotationCollector* coll,
1100                               ClassLoaderData* loader_data,
1101                               TRAPS) {
1102 
1103   assert(cp != NULL, "invariant");
1104   assert(buffer != NULL, "invariant");
1105   assert(coll != NULL, "invariant");
1106   assert(loader_data != NULL, "invariant");
1107 
1108   // annotations := do(nann:u2) {annotation}
1109   int index = 2; // read nann
1110   if (index >= limit)  return;
1111   int nann = Bytes::get_Java_u2((address)buffer + index - 2);
1112   enum {  // initial annotation layout
1113     atype_off = 0,      // utf8 such as 'Ljava/lang/annotation/Retention;'
1114     count_off = 2,      // u2   such as 1 (one value)
1115     member_off = 4,     // utf8 such as 'value'
1116     tag_off = 6,        // u1   such as 'c' (type) or 'e' (enum)
1117     e_tag_val = 'e',
1118     e_type_off = 7,   // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
1119     e_con_off = 9,    // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
1120     e_size = 11,     // end of 'e' annotation
1121     c_tag_val = 'c',    // payload is type
1122     c_con_off = 7,    // utf8 payload, such as 'I'
1123     c_size = 9,       // end of 'c' annotation
1124     s_tag_val = 's',    // payload is String
1125     s_con_off = 7,    // utf8 payload, such as 'Ljava/lang/String;'
1126     s_size = 9,
1127     min_size = 6        // smallest possible size (zero members)
1128   };
1129   // Cannot add min_size to index in case of overflow MAX_INT
1130   while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
1131     int index0 = index;
1132     index = skip_annotation(buffer, limit, index);
1133     const u1* const abase = buffer + index0;
1134     const int atype = Bytes::get_Java_u2((address)abase + atype_off);
1135     const int count = Bytes::get_Java_u2((address)abase + count_off);
1136     const Symbol* const aname = check_symbol_at(cp, atype);
1137     if (aname == NULL)  break;  // invalid annotation name
1138     const Symbol* member = NULL;
1139     if (count >= 1) {
1140       const int member_index = Bytes::get_Java_u2((address)abase + member_off);
1141       member = check_symbol_at(cp, member_index);
1142       if (member == NULL)  break;  // invalid member name
1143     }
1144 
1145     // Here is where parsing particular annotations will take place.
1146     AnnotationCollector::ID id = coll->annotation_index(loader_data, aname);
1147     if (AnnotationCollector::_unknown == id)  continue;
1148     coll->set_annotation(id);
1149 
1150     if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
1151       // @Contended can optionally specify the contention group.
1152       //
1153       // Contended group defines the equivalence class over the fields:
1154       // the fields within the same contended group are not treated distinct.
1155       // The only exception is default group, which does not incur the
1156       // equivalence. Naturally, contention group for classes is meaningless.
1157       //
1158       // While the contention group is specified as String, annotation
1159       // values are already interned, and we might as well use the constant
1160       // pool index as the group tag.
1161       //
1162       u2 group_index = 0; // default contended group
1163       if (count == 1
1164         && s_size == (index - index0)  // match size
1165         && s_tag_val == *(abase + tag_off)
1166         && member == vmSymbols::value_name()) {
1167         group_index = Bytes::get_Java_u2((address)abase + s_con_off);
1168         if (cp->symbol_at(group_index)->utf8_length() == 0) {
1169           group_index = 0; // default contended group
1170         }
1171       }
1172       coll->set_contended_group(group_index);
1173     }
1174   }
1175 }
1176 
1177 
1178 // Parse attributes for a field.
1179 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
1180                                              u2 attributes_count,
1181                                              bool is_static, u2 signature_index,
1182                                              u2* const constantvalue_index_addr,
1183                                              bool* const is_synthetic_addr,
1184                                              u2* const generic_signature_index_addr,
1185                                              ClassFileParser::FieldAnnotationCollector* parsed_annotations,
1186                                              TRAPS) {
1187   assert(cfs != NULL, "invariant");
1188   assert(constantvalue_index_addr != NULL, "invariant");
1189   assert(is_synthetic_addr != NULL, "invariant");
1190   assert(generic_signature_index_addr != NULL, "invariant");
1191   assert(parsed_annotations != NULL, "invariant");
1192   assert(attributes_count > 0, "attributes_count should be greater than 0");
1193 
1194   u2 constantvalue_index = 0;
1195   u2 generic_signature_index = 0;
1196   bool is_synthetic = false;
1197   const u1* runtime_visible_annotations = NULL;
1198   int runtime_visible_annotations_length = 0;
1199   const u1* runtime_invisible_annotations = NULL;
1200   int runtime_invisible_annotations_length = 0;
1201   const u1* runtime_visible_type_annotations = NULL;
1202   int runtime_visible_type_annotations_length = 0;
1203   const u1* runtime_invisible_type_annotations = NULL;
1204   int runtime_invisible_type_annotations_length = 0;
1205   bool runtime_invisible_annotations_exists = false;
1206   bool runtime_invisible_type_annotations_exists = false;
1207   const ConstantPool* const cp = _cp;
1208 
1209   while (attributes_count--) {
1210     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
1211     const u2 attribute_name_index = cfs->get_u2_fast();
1212     const u4 attribute_length = cfs->get_u4_fast();
1213     check_property(valid_symbol_at(attribute_name_index),
1214                    "Invalid field attribute index %u in class file %s",
1215                    attribute_name_index,
1216                    CHECK);
1217 
1218     const Symbol* const attribute_name = cp->symbol_at(attribute_name_index);
1219     if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1220       // ignore if non-static
1221       if (constantvalue_index != 0) {
1222         classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1223       }
1224       check_property(
1225         attribute_length == 2,
1226         "Invalid ConstantValue field attribute length %u in class file %s",
1227         attribute_length, CHECK);
1228 
1229       constantvalue_index = cfs->get_u2(CHECK);
1230       if (_need_verify) {
1231         verify_constantvalue(cp, constantvalue_index, signature_index, CHECK);
1232       }
1233     } else if (attribute_name == vmSymbols::tag_synthetic()) {
1234       if (attribute_length != 0) {
1235         classfile_parse_error(
1236           "Invalid Synthetic field attribute length %u in class file %s",
1237           attribute_length, CHECK);
1238       }
1239       is_synthetic = true;
1240     } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1241       if (attribute_length != 0) {
1242         classfile_parse_error(
1243           "Invalid Deprecated field attribute length %u in class file %s",
1244           attribute_length, CHECK);
1245       }
1246     } else if (_major_version >= JAVA_1_5_VERSION) {
1247       if (attribute_name == vmSymbols::tag_signature()) {
1248         if (attribute_length != 2) {
1249           classfile_parse_error(
1250             "Wrong size %u for field's Signature attribute in class file %s",
1251             attribute_length, CHECK);
1252         }
1253         generic_signature_index = parse_generic_signature_attribute(cfs, CHECK);
1254       } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1255         if (runtime_visible_annotations != NULL) {
1256           classfile_parse_error(
1257             "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
1258         }
1259         runtime_visible_annotations_length = attribute_length;
1260         runtime_visible_annotations = cfs->get_u1_buffer();
1261         assert(runtime_visible_annotations != NULL, "null visible annotations");
1262         cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
1263         parse_annotations(cp,
1264                           runtime_visible_annotations,
1265                           runtime_visible_annotations_length,
1266                           parsed_annotations,
1267                           _loader_data,
1268                           CHECK);
1269         cfs->skip_u1_fast(runtime_visible_annotations_length);
1270       } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1271         if (runtime_invisible_annotations_exists) {
1272           classfile_parse_error(
1273             "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
1274         }
1275         runtime_invisible_annotations_exists = true;
1276         if (PreserveAllAnnotations) {
1277           runtime_invisible_annotations_length = attribute_length;
1278           runtime_invisible_annotations = cfs->get_u1_buffer();
1279           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1280         }
1281         cfs->skip_u1(attribute_length, CHECK);
1282       } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
1283         if (runtime_visible_type_annotations != NULL) {
1284           classfile_parse_error(
1285             "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
1286         }
1287         runtime_visible_type_annotations_length = attribute_length;
1288         runtime_visible_type_annotations = cfs->get_u1_buffer();
1289         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
1290         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
1291       } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
1292         if (runtime_invisible_type_annotations_exists) {
1293           classfile_parse_error(
1294             "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
1295         } else {
1296           runtime_invisible_type_annotations_exists = true;
1297         }
1298         if (PreserveAllAnnotations) {
1299           runtime_invisible_type_annotations_length = attribute_length;
1300           runtime_invisible_type_annotations = cfs->get_u1_buffer();
1301           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
1302         }
1303         cfs->skip_u1(attribute_length, CHECK);
1304       } else {
1305         cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1306       }
1307     } else {
1308       cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
1309     }
1310   }
1311 
1312   *constantvalue_index_addr = constantvalue_index;
1313   *is_synthetic_addr = is_synthetic;
1314   *generic_signature_index_addr = generic_signature_index;
1315   AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
1316                                             runtime_visible_annotations_length,
1317                                             runtime_invisible_annotations,
1318                                             runtime_invisible_annotations_length,
1319                                             CHECK);
1320   parsed_annotations->set_field_annotations(a);
1321   a = assemble_annotations(runtime_visible_type_annotations,
1322                            runtime_visible_type_annotations_length,
1323                            runtime_invisible_type_annotations,
1324                            runtime_invisible_type_annotations_length,
1325                            CHECK);
1326   parsed_annotations->set_field_type_annotations(a);
1327   return;
1328 }
1329 
1330 
1331 // Field allocation types. Used for computing field offsets.
1332 
1333 enum FieldAllocationType {
1334   STATIC_OOP,           // Oops
1335   STATIC_BYTE,          // Boolean, Byte, char
1336   STATIC_SHORT,         // shorts
1337   STATIC_WORD,          // ints
1338   STATIC_DOUBLE,        // aligned long or double
1339   NONSTATIC_OOP,
1340   NONSTATIC_BYTE,
1341   NONSTATIC_SHORT,
1342   NONSTATIC_WORD,
1343   NONSTATIC_DOUBLE,
1344   MAX_FIELD_ALLOCATION_TYPE,
1345   BAD_ALLOCATION_TYPE = -1
1346 };
1347 
1348 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
1349   BAD_ALLOCATION_TYPE, // 0
1350   BAD_ALLOCATION_TYPE, // 1
1351   BAD_ALLOCATION_TYPE, // 2
1352   BAD_ALLOCATION_TYPE, // 3
1353   NONSTATIC_BYTE ,     // T_BOOLEAN     =  4,
1354   NONSTATIC_SHORT,     // T_CHAR        =  5,
1355   NONSTATIC_WORD,      // T_FLOAT       =  6,
1356   NONSTATIC_DOUBLE,    // T_DOUBLE      =  7,
1357   NONSTATIC_BYTE,      // T_BYTE        =  8,
1358   NONSTATIC_SHORT,     // T_SHORT       =  9,
1359   NONSTATIC_WORD,      // T_INT         = 10,
1360   NONSTATIC_DOUBLE,    // T_LONG        = 11,
1361   NONSTATIC_OOP,       // T_OBJECT      = 12,
1362   NONSTATIC_OOP,       // T_ARRAY       = 13,
1363   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1364   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1365   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1366   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1367   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1368   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1369   BAD_ALLOCATION_TYPE, // 0
1370   BAD_ALLOCATION_TYPE, // 1
1371   BAD_ALLOCATION_TYPE, // 2
1372   BAD_ALLOCATION_TYPE, // 3
1373   STATIC_BYTE ,        // T_BOOLEAN     =  4,
1374   STATIC_SHORT,        // T_CHAR        =  5,
1375   STATIC_WORD,         // T_FLOAT       =  6,
1376   STATIC_DOUBLE,       // T_DOUBLE      =  7,
1377   STATIC_BYTE,         // T_BYTE        =  8,
1378   STATIC_SHORT,        // T_SHORT       =  9,
1379   STATIC_WORD,         // T_INT         = 10,
1380   STATIC_DOUBLE,       // T_LONG        = 11,
1381   STATIC_OOP,          // T_OBJECT      = 12,
1382   STATIC_OOP,          // T_ARRAY       = 13,
1383   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
1384   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
1385   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
1386   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
1387   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
1388   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
1389 };
1390 
1391 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
1392   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
1393   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
1394   assert(result != BAD_ALLOCATION_TYPE, "bad type");
1395   return result;
1396 }
1397 
1398 class ClassFileParser::FieldAllocationCount : public ResourceObj {
1399  public:
1400   u2 count[MAX_FIELD_ALLOCATION_TYPE];
1401 
1402   FieldAllocationCount() {
1403     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
1404       count[i] = 0;
1405     }
1406   }
1407 
1408   FieldAllocationType update(bool is_static, BasicType type) {
1409     FieldAllocationType atype = basic_type_to_atype(is_static, type);
1410     if (atype != BAD_ALLOCATION_TYPE) {
1411       // Make sure there is no overflow with injected fields.
1412       assert(count[atype] < 0xFFFF, "More than 65535 fields");
1413       count[atype]++;
1414     }
1415     return atype;
1416   }
1417 };
1418 
1419 // Side-effects: populates the _fields, _fields_annotations,
1420 // _fields_type_annotations fields
1421 void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
1422                                    bool is_interface,
1423                                    FieldAllocationCount* const fac,
1424                                    ConstantPool* cp,
1425                                    const int cp_size,
1426                                    u2* const java_fields_count_ptr,
1427                                    TRAPS) {
1428 
1429   assert(cfs != NULL, "invariant");
1430   assert(fac != NULL, "invariant");
1431   assert(cp != NULL, "invariant");
1432   assert(java_fields_count_ptr != NULL, "invariant");
1433 
1434   assert(NULL == _fields, "invariant");
1435   assert(NULL == _fields_annotations, "invariant");
1436   assert(NULL == _fields_type_annotations, "invariant");
1437 
1438   cfs->guarantee_more(2, CHECK);  // length
1439   const u2 length = cfs->get_u2_fast();
1440   *java_fields_count_ptr = length;
1441 
1442   int num_injected = 0;
1443   const InjectedField* const injected = JavaClasses::get_injected(_class_name,
1444                                                                   &num_injected);
1445   const int total_fields = length + num_injected;
1446 
1447   // The field array starts with tuples of shorts
1448   // [access, name index, sig index, initial value index, byte offset].
1449   // A generic signature slot only exists for field with generic
1450   // signature attribute. And the access flag is set with
1451   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
1452   // signature slots are at the end of the field array and after all
1453   // other fields data.
1454   //
1455   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
1456   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
1457   //       ...
1458   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
1459   //       [generic signature index]
1460   //       [generic signature index]
1461   //       ...
1462   //
1463   // Allocate a temporary resource array for field data. For each field,
1464   // a slot is reserved in the temporary array for the generic signature
1465   // index. After parsing all fields, the data are copied to a permanent
1466   // array and any unused slots will be discarded.
1467   ResourceMark rm(THREAD);
1468   u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD,
1469                                               u2,
1470                                               total_fields * (FieldInfo::field_slots + 1));
1471 
1472   // The generic signature slots start after all other fields' data.
1473   int generic_signature_slot = total_fields * FieldInfo::field_slots;
1474   int num_generic_signature = 0;
1475   for (int n = 0; n < length; n++) {
1476     // access_flags, name_index, descriptor_index, attributes_count
1477     cfs->guarantee_more(8, CHECK);
1478 
1479     AccessFlags access_flags;
1480     const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1481     verify_legal_field_modifiers(flags, is_interface, CHECK);
1482     access_flags.set_flags(flags);
1483 
1484     const u2 name_index = cfs->get_u2_fast();
1485     check_property(valid_symbol_at(name_index),
1486       "Invalid constant pool index %u for field name in class file %s",
1487       name_index, CHECK);
1488     const Symbol* const name = cp->symbol_at(name_index);
1489     verify_legal_field_name(name, CHECK);
1490 
1491     const u2 signature_index = cfs->get_u2_fast();
1492     check_property(valid_symbol_at(signature_index),
1493       "Invalid constant pool index %u for field signature in class file %s",
1494       signature_index, CHECK);
1495     const Symbol* const sig = cp->symbol_at(signature_index);
1496     verify_legal_field_signature(name, sig, CHECK);
1497 
1498     u2 constantvalue_index = 0;
1499     bool is_synthetic = false;
1500     u2 generic_signature_index = 0;
1501     const bool is_static = access_flags.is_static();
1502     FieldAnnotationCollector parsed_annotations(_loader_data);
1503 
1504     const u2 attributes_count = cfs->get_u2_fast();
1505     if (attributes_count > 0) {
1506       parse_field_attributes(cfs,
1507                              attributes_count,
1508                              is_static,
1509                              signature_index,
1510                              &constantvalue_index,
1511                              &is_synthetic,
1512                              &generic_signature_index,
1513                              &parsed_annotations,
1514                              CHECK);
1515 
1516       if (parsed_annotations.field_annotations() != NULL) {
1517         if (_fields_annotations == NULL) {
1518           _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
1519                                              _loader_data, length, NULL,
1520                                              CHECK);
1521         }
1522         _fields_annotations->at_put(n, parsed_annotations.field_annotations());
1523         parsed_annotations.set_field_annotations(NULL);
1524       }
1525       if (parsed_annotations.field_type_annotations() != NULL) {
1526         if (_fields_type_annotations == NULL) {
1527           _fields_type_annotations =
1528             MetadataFactory::new_array<AnnotationArray*>(_loader_data,
1529                                                          length,
1530                                                          NULL,
1531                                                          CHECK);
1532         }
1533         _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
1534         parsed_annotations.set_field_type_annotations(NULL);
1535       }
1536 
1537       if (is_synthetic) {
1538         access_flags.set_is_synthetic();
1539       }
1540       if (generic_signature_index != 0) {
1541         access_flags.set_field_has_generic_signature();
1542         fa[generic_signature_slot] = generic_signature_index;
1543         generic_signature_slot ++;
1544         num_generic_signature ++;
1545       }
1546     }
1547 
1548     FieldInfo* const field = FieldInfo::from_field_array(fa, n);
1549     field->initialize(access_flags.as_short(),
1550                       name_index,
1551                       signature_index,
1552                       constantvalue_index);
1553     const BasicType type = cp->basic_type_for_signature_at(signature_index);
1554 
1555     // Remember how many oops we encountered and compute allocation type
1556     const FieldAllocationType atype = fac->update(is_static, type);
1557     field->set_allocation_type(atype);
1558 
1559     // After field is initialized with type, we can augment it with aux info
1560     if (parsed_annotations.has_any_annotations())
1561       parsed_annotations.apply_to(field);
1562   }
1563 
1564   int index = length;
1565   if (num_injected != 0) {
1566     for (int n = 0; n < num_injected; n++) {
1567       // Check for duplicates
1568       if (injected[n].may_be_java) {
1569         const Symbol* const name      = injected[n].name();
1570         const Symbol* const signature = injected[n].signature();
1571         bool duplicate = false;
1572         for (int i = 0; i < length; i++) {
1573           const FieldInfo* const f = FieldInfo::from_field_array(fa, i);
1574           if (name      == cp->symbol_at(f->name_index()) &&
1575               signature == cp->symbol_at(f->signature_index())) {
1576             // Symbol is desclared in Java so skip this one
1577             duplicate = true;
1578             break;
1579           }
1580         }
1581         if (duplicate) {
1582           // These will be removed from the field array at the end
1583           continue;
1584         }
1585       }
1586 
1587       // Injected field
1588       FieldInfo* const field = FieldInfo::from_field_array(fa, index);
1589       field->initialize(JVM_ACC_FIELD_INTERNAL,
1590                         injected[n].name_index,
1591                         injected[n].signature_index,
1592                         0);
1593 
1594       const BasicType type = FieldType::basic_type(injected[n].signature());
1595 
1596       // Remember how many oops we encountered and compute allocation type
1597       const FieldAllocationType atype = fac->update(false, type);
1598       field->set_allocation_type(atype);
1599       index++;
1600     }
1601   }
1602 
1603   assert(NULL == _fields, "invariant");
1604 
1605   _fields =
1606     MetadataFactory::new_array<u2>(_loader_data,
1607                                    index * FieldInfo::field_slots + num_generic_signature,
1608                                    CHECK);
1609   // Sometimes injected fields already exist in the Java source so
1610   // the fields array could be too long.  In that case the
1611   // fields array is trimed. Also unused slots that were reserved
1612   // for generic signature indexes are discarded.
1613   {
1614     int i = 0;
1615     for (; i < index * FieldInfo::field_slots; i++) {
1616       _fields->at_put(i, fa[i]);
1617     }
1618     for (int j = total_fields * FieldInfo::field_slots;
1619          j < generic_signature_slot; j++) {
1620       _fields->at_put(i++, fa[j]);
1621     }
1622     assert(_fields->length() == i, "");
1623   }
1624 
1625   if (_need_verify && length > 1) {
1626     // Check duplicated fields
1627     ResourceMark rm(THREAD);
1628     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1629       THREAD, NameSigHash*, HASH_ROW_SIZE);
1630     initialize_hashtable(names_and_sigs);
1631     bool dup = false;
1632     const Symbol* name = NULL;
1633     const Symbol* sig = NULL;
1634     {
1635       debug_only(NoSafepointVerifier nsv;)
1636       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
1637         name = fs.name();
1638         sig = fs.signature();
1639         // If no duplicates, add name/signature in hashtable names_and_sigs.
1640         if (!put_after_lookup(name, sig, names_and_sigs)) {
1641           dup = true;
1642           break;
1643         }
1644       }
1645     }
1646     if (dup) {
1647       classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s",
1648                              name->as_C_string(), sig->as_klass_external_name(), CHECK);
1649     }
1650   }
1651 }
1652 
1653 
1654 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) {
1655   while (length-- > 0) {
1656     *dest++ = Bytes::get_Java_u2((u1*) (src++));
1657   }
1658 }
1659 
1660 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
1661                                                  u4 code_length,
1662                                                  u4 exception_table_length,
1663                                                  TRAPS) {
1664   assert(cfs != NULL, "invariant");
1665 
1666   const u2* const exception_table_start = cfs->get_u2_buffer();
1667   assert(exception_table_start != NULL, "null exception table");
1668 
1669   cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc,
1670                                                                // end_pc,
1671                                                                // handler_pc,
1672                                                                // catch_type_index
1673 
1674   // Will check legal target after parsing code array in verifier.
1675   if (_need_verify) {
1676     for (unsigned int i = 0; i < exception_table_length; i++) {
1677       const u2 start_pc = cfs->get_u2_fast();
1678       const u2 end_pc = cfs->get_u2_fast();
1679       const u2 handler_pc = cfs->get_u2_fast();
1680       const u2 catch_type_index = cfs->get_u2_fast();
1681       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1682                          "Illegal exception table range in class file %s",
1683                          CHECK_NULL);
1684       guarantee_property(handler_pc < code_length,
1685                          "Illegal exception table handler in class file %s",
1686                          CHECK_NULL);
1687       if (catch_type_index != 0) {
1688         guarantee_property(valid_klass_reference_at(catch_type_index),
1689                            "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
1690       }
1691     }
1692   } else {
1693     cfs->skip_u2_fast(exception_table_length * 4);
1694   }
1695   return exception_table_start;
1696 }
1697 
1698 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length,
1699                                              u4 code_length,
1700                                              CompressedLineNumberWriteStream**const write_stream,
1701                                              TRAPS) {
1702 
1703   const ClassFileStream* const cfs = _stream;
1704   unsigned int num_entries = cfs->get_u2(CHECK);
1705 
1706   // Each entry is a u2 start_pc, and a u2 line_number
1707   const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
1708 
1709   // Verify line number attribute and table length
1710   check_property(
1711     code_attribute_length == sizeof(u2) + length_in_bytes,
1712     "LineNumberTable attribute has wrong length in class file %s", CHECK);
1713 
1714   cfs->guarantee_more(length_in_bytes, CHECK);
1715 
1716   if ((*write_stream) == NULL) {
1717     if (length_in_bytes > fixed_buffer_size) {
1718       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1719     } else {
1720       (*write_stream) = new CompressedLineNumberWriteStream(
1721         _linenumbertable_buffer, fixed_buffer_size);
1722     }
1723   }
1724 
1725   while (num_entries-- > 0) {
1726     const u2 bci  = cfs->get_u2_fast(); // start_pc
1727     const u2 line = cfs->get_u2_fast(); // line_number
1728     guarantee_property(bci < code_length,
1729         "Invalid pc in LineNumberTable in class file %s", CHECK);
1730     (*write_stream)->write_pair(bci, line);
1731   }
1732 }
1733 
1734 
1735 class LVT_Hash : public AllStatic {
1736  public:
1737 
1738   static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
1739   /*
1740    * 3-tuple start_bci/length/slot has to be unique key,
1741    * so the following comparison seems to be redundant:
1742    *       && elem->name_cp_index == entry->_elem->name_cp_index
1743    */
1744     return (e0.start_bci     == e1.start_bci &&
1745             e0.length        == e1.length &&
1746             e0.name_cp_index == e1.name_cp_index &&
1747             e0.slot          == e1.slot);
1748   }
1749 
1750   static unsigned int hash(LocalVariableTableElement const& e0) {
1751     unsigned int raw_hash = e0.start_bci;
1752 
1753     raw_hash = e0.length        + raw_hash * 37;
1754     raw_hash = e0.name_cp_index + raw_hash * 37;
1755     raw_hash = e0.slot          + raw_hash * 37;
1756 
1757     return raw_hash;
1758   }
1759 };
1760 
1761 
1762 // Class file LocalVariableTable elements.
1763 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1764  public:
1765   u2 start_bci;
1766   u2 length;
1767   u2 name_cp_index;
1768   u2 descriptor_cp_index;
1769   u2 slot;
1770 };
1771 
1772 static void copy_lvt_element(const Classfile_LVT_Element* const src,
1773                              LocalVariableTableElement* const lvt) {
1774   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
1775   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
1776   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1777   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1778   lvt->signature_cp_index  = 0;
1779   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
1780 }
1781 
1782 // Function is used to parse both attributes:
1783 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1784 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
1785                                                      u4 code_length,
1786                                                      u2 max_locals,
1787                                                      u4 code_attribute_length,
1788                                                      u2* const localvariable_table_length,
1789                                                      bool isLVTT,
1790                                                      TRAPS) {
1791   const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1792   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1793   const unsigned int size =
1794     (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1795 
1796   const ConstantPool* const cp = _cp;
1797 
1798   // Verify local variable table attribute has right length
1799   if (_need_verify) {
1800     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1801                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1802   }
1803 
1804   const u2* const localvariable_table_start = cfs->get_u2_buffer();
1805   assert(localvariable_table_start != NULL, "null local variable table");
1806   if (!_need_verify) {
1807     cfs->skip_u2_fast(size);
1808   } else {
1809     cfs->guarantee_more(size * 2, CHECK_NULL);
1810     for(int i = 0; i < (*localvariable_table_length); i++) {
1811       const u2 start_pc = cfs->get_u2_fast();
1812       const u2 length = cfs->get_u2_fast();
1813       const u2 name_index = cfs->get_u2_fast();
1814       const u2 descriptor_index = cfs->get_u2_fast();
1815       const u2 index = cfs->get_u2_fast();
1816       // Assign to a u4 to avoid overflow
1817       const u4 end_pc = (u4)start_pc + (u4)length;
1818 
1819       if (start_pc >= code_length) {
1820         classfile_parse_error(
1821           "Invalid start_pc %u in %s in class file %s",
1822           start_pc, tbl_name, CHECK_NULL);
1823       }
1824       if (end_pc > code_length) {
1825         classfile_parse_error(
1826           "Invalid length %u in %s in class file %s",
1827           length, tbl_name, CHECK_NULL);
1828       }
1829       const int cp_size = cp->length();
1830       guarantee_property(valid_symbol_at(name_index),
1831         "Name index %u in %s has bad constant type in class file %s",
1832         name_index, tbl_name, CHECK_NULL);
1833       guarantee_property(valid_symbol_at(descriptor_index),
1834         "Signature index %u in %s has bad constant type in class file %s",
1835         descriptor_index, tbl_name, CHECK_NULL);
1836 
1837       const Symbol* const name = cp->symbol_at(name_index);
1838       const Symbol* const sig = cp->symbol_at(descriptor_index);
1839       verify_legal_field_name(name, CHECK_NULL);
1840       u2 extra_slot = 0;
1841       if (!isLVTT) {
1842         verify_legal_field_signature(name, sig, CHECK_NULL);
1843 
1844         // 4894874: check special cases for double and long local variables
1845         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
1846             sig == vmSymbols::type_signature(T_LONG)) {
1847           extra_slot = 1;
1848         }
1849       }
1850       guarantee_property((index + extra_slot) < max_locals,
1851                           "Invalid index %u in %s in class file %s",
1852                           index, tbl_name, CHECK_NULL);
1853     }
1854   }
1855   return localvariable_table_start;
1856 }
1857 
1858 
1859 void ClassFileParser::parse_type_array(u2 array_length,
1860                                        u4 code_length,
1861                                        u4* const u1_index,
1862                                        u4* const u2_index,
1863                                        u1* const u1_array,
1864                                        u2* const u2_array,
1865                                        TRAPS) {
1866   const ClassFileStream* const cfs = _stream;
1867   u2 index = 0; // index in the array with long/double occupying two slots
1868   u4 i1 = *u1_index;
1869   u4 i2 = *u2_index + 1;
1870   for(int i = 0; i < array_length; i++) {
1871     const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1872     index++;
1873     if (tag == ITEM_Long || tag == ITEM_Double) {
1874       index++;
1875     } else if (tag == ITEM_Object) {
1876       const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1877       guarantee_property(valid_klass_reference_at(class_index),
1878                          "Bad class index %u in StackMap in class file %s",
1879                          class_index, CHECK);
1880     } else if (tag == ITEM_Uninitialized) {
1881       const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1882       guarantee_property(
1883         offset < code_length,
1884         "Bad uninitialized type offset %u in StackMap in class file %s",
1885         offset, CHECK);
1886     } else {
1887       guarantee_property(
1888         tag <= (u1)ITEM_Uninitialized,
1889         "Unknown variable type %u in StackMap in class file %s",
1890         tag, CHECK);
1891     }
1892   }
1893   u2_array[*u2_index] = index;
1894   *u1_index = i1;
1895   *u2_index = i2;
1896 }
1897 
1898 static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
1899                                       u4 code_attribute_length,
1900                                       bool need_verify,
1901                                       TRAPS) {
1902   assert(cfs != NULL, "invariant");
1903 
1904   if (0 == code_attribute_length) {
1905     return NULL;
1906   }
1907 
1908   const u1* const stackmap_table_start = cfs->get_u1_buffer();
1909   assert(stackmap_table_start != NULL, "null stackmap table");
1910 
1911   // check code_attribute_length first
1912   cfs->skip_u1(code_attribute_length, CHECK_NULL);
1913 
1914   if (!need_verify && !DumpSharedSpaces) {
1915     return NULL;
1916   }
1917   return stackmap_table_start;
1918 }
1919 
1920 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
1921                                                     u2* const checked_exceptions_length,
1922                                                     u4 method_attribute_length,
1923                                                     TRAPS) {
1924   assert(cfs != NULL, "invariant");
1925   assert(checked_exceptions_length != NULL, "invariant");
1926 
1927   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
1928   *checked_exceptions_length = cfs->get_u2_fast();
1929   const unsigned int size =
1930     (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1931   const u2* const checked_exceptions_start = cfs->get_u2_buffer();
1932   assert(checked_exceptions_start != NULL, "null checked exceptions");
1933   if (!_need_verify) {
1934     cfs->skip_u2_fast(size);
1935   } else {
1936     // Verify each value in the checked exception table
1937     u2 checked_exception;
1938     const u2 len = *checked_exceptions_length;
1939     cfs->guarantee_more(2 * len, CHECK_NULL);
1940     for (int i = 0; i < len; i++) {
1941       checked_exception = cfs->get_u2_fast();
1942       check_property(
1943         valid_klass_reference_at(checked_exception),
1944         "Exception name has bad type at constant pool %u in class file %s",
1945         checked_exception, CHECK_NULL);
1946     }
1947   }
1948   // check exceptions attribute length
1949   if (_need_verify) {
1950     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1951                                                    sizeof(u2) * size),
1952                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1953   }
1954   return checked_exceptions_start;
1955 }
1956 
1957 void ClassFileParser::throwIllegalSignature(const char* type,
1958                                             const Symbol* name,
1959                                             const Symbol* sig,
1960                                             TRAPS) const {
1961   assert(name != NULL, "invariant");
1962   assert(sig != NULL, "invariant");
1963 
1964   ResourceMark rm(THREAD);
1965   Exceptions::fthrow(THREAD_AND_LOCATION,
1966       vmSymbols::java_lang_ClassFormatError(),
1967       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
1968       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
1969 }
1970 
1971 AnnotationCollector::ID
1972 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
1973                                       const Symbol* name) {
1974   const vmSymbols::SID sid = vmSymbols::find_sid(name);
1975   // Privileged code can use all annotations.  Other code silently drops some.
1976   const bool privileged = loader_data->is_the_null_class_loader_data() ||
1977                           loader_data->is_platform_class_loader_data() ||
1978                           loader_data->is_anonymous();
1979   switch (sid) {
1980     case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): {
1981       if (_location != _in_method)  break;  // only allow for methods
1982       if (!privileged)              break;  // only allow in privileged code
1983       return _method_CallerSensitive;
1984     }
1985     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): {
1986       if (_location != _in_method)  break;  // only allow for methods
1987       if (!privileged)              break;  // only allow in privileged code
1988       return _method_ForceInline;
1989     }
1990     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): {
1991       if (_location != _in_method)  break;  // only allow for methods
1992       if (!privileged)              break;  // only allow in privileged code
1993       return _method_DontInline;
1994     }
1995     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): {
1996       if (_location != _in_method)  break;  // only allow for methods
1997       if (!privileged)              break;  // only allow in privileged code
1998       return _method_InjectedProfile;
1999     }
2000     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): {
2001       if (_location != _in_method)  break;  // only allow for methods
2002       if (!privileged)              break;  // only allow in privileged code
2003       return _method_LambdaForm_Compiled;
2004     }
2005     case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): {
2006       if (_location != _in_method)  break;  // only allow for methods
2007       if (!privileged)              break;  // only allow in privileged code
2008       return _method_LambdaForm_Hidden;
2009     }
2010     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): {
2011       if (_location != _in_method)  break;  // only allow for methods
2012       if (!privileged)              break;  // only allow in privileged code
2013       return _method_HotSpotIntrinsicCandidate;
2014     }
2015     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): {
2016       if (_location != _in_field)   break;  // only allow for fields
2017       if (!privileged)              break;  // only allow in privileged code
2018       return _field_Stable;
2019     }
2020     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): {
2021       if (_location != _in_field && _location != _in_class) {
2022         break;  // only allow for fields and classes
2023       }
2024       if (!EnableContended || (RestrictContended && !privileged)) {
2025         break;  // honor privileges
2026       }
2027       return _jdk_internal_vm_annotation_Contended;
2028     }
2029     case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
2030       if (_location != _in_method)  break;  // only allow for methods
2031       if (RestrictReservedStack && !privileged) break; // honor privileges
2032       return _jdk_internal_vm_annotation_ReservedStackAccess;
2033     }
2034     default: {
2035       break;
2036     }
2037   }
2038   return AnnotationCollector::_unknown;
2039 }
2040 
2041 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
2042   if (is_contended())
2043     f->set_contended_group(contended_group());
2044   if (is_stable())
2045     f->set_stable(true);
2046 }
2047 
2048 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
2049   // If there's an error deallocate metadata for field annotations
2050   MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
2051   MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
2052 }
2053 
2054 void MethodAnnotationCollector::apply_to(methodHandle m) {
2055   if (has_annotation(_method_CallerSensitive))
2056     m->set_caller_sensitive(true);
2057   if (has_annotation(_method_ForceInline))
2058     m->set_force_inline(true);
2059   if (has_annotation(_method_DontInline))
2060     m->set_dont_inline(true);
2061   if (has_annotation(_method_InjectedProfile))
2062     m->set_has_injected_profile(true);
2063   if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
2064     m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
2065   if (has_annotation(_method_LambdaForm_Hidden))
2066     m->set_hidden(true);
2067   if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
2068     m->set_intrinsic_candidate(true);
2069   if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
2070     m->set_has_reserved_stack_access(true);
2071 }
2072 
2073 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
2074   assert(ik != NULL, "invariant");
2075   ik->set_is_contended(is_contended());
2076 }
2077 
2078 #define MAX_ARGS_SIZE 255
2079 #define MAX_CODE_SIZE 65535
2080 #define INITIAL_MAX_LVT_NUMBER 256
2081 
2082 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2083  *
2084  * Rules for LVT's and LVTT's are:
2085  *   - There can be any number of LVT's and LVTT's.
2086  *   - If there are n LVT's, it is the same as if there was just
2087  *     one LVT containing all the entries from the n LVT's.
2088  *   - There may be no more than one LVT entry per local variable.
2089  *     Two LVT entries are 'equal' if these fields are the same:
2090  *        start_pc, length, name, slot
2091  *   - There may be no more than one LVTT entry per each LVT entry.
2092  *     Each LVTT entry has to match some LVT entry.
2093  *   - HotSpot internal LVT keeps natural ordering of class file LVT entries.
2094  */
2095 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm,
2096                                                int lvt_cnt,
2097                                                u2* const localvariable_table_length,
2098                                                const u2**const localvariable_table_start,
2099                                                int lvtt_cnt,
2100                                                u2* const localvariable_type_table_length,
2101                                                const u2**const localvariable_type_table_start,
2102                                                TRAPS) {
2103 
2104   ResourceMark rm(THREAD);
2105 
2106   typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
2107                             &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
2108 
2109   LVT_HashTable* const table = new LVT_HashTable();
2110 
2111   // To fill LocalVariableTable in
2112   const Classfile_LVT_Element* cf_lvt;
2113   LocalVariableTableElement* lvt = cm->localvariable_table_start();
2114 
2115   for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
2116     cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
2117     for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
2118       copy_lvt_element(&cf_lvt[idx], lvt);
2119       // If no duplicates, add LVT elem in hashtable.
2120       if (table->put(*lvt, lvt) == false
2121           && _need_verify
2122           && _major_version >= JAVA_1_5_VERSION) {
2123         classfile_parse_error("Duplicated LocalVariableTable attribute "
2124                               "entry for '%s' in class file %s",
2125                                _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
2126                                CHECK);
2127       }
2128     }
2129   }
2130 
2131   // To merge LocalVariableTable and LocalVariableTypeTable
2132   const Classfile_LVT_Element* cf_lvtt;
2133   LocalVariableTableElement lvtt_elem;
2134 
2135   for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
2136     cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
2137     for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
2138       copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
2139       LocalVariableTableElement** entry = table->get(lvtt_elem);
2140       if (entry == NULL) {
2141         if (_need_verify) {
2142           classfile_parse_error("LVTT entry for '%s' in class file %s "
2143                                 "does not match any LVT entry",
2144                                  _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2145                                  CHECK);
2146         }
2147       } else if ((*entry)->signature_cp_index != 0 && _need_verify) {
2148         classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
2149                               "entry for '%s' in class file %s",
2150                                _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
2151                                CHECK);
2152       } else {
2153         // to add generic signatures into LocalVariableTable
2154         (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index;
2155       }
2156     }
2157   }
2158 }
2159 
2160 
2161 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
2162                                        const u1* runtime_visible_annotations,
2163                                        int runtime_visible_annotations_length,
2164                                        const u1* runtime_invisible_annotations,
2165                                        int runtime_invisible_annotations_length,
2166                                        const u1* runtime_visible_parameter_annotations,
2167                                        int runtime_visible_parameter_annotations_length,
2168                                        const u1* runtime_invisible_parameter_annotations,
2169                                        int runtime_invisible_parameter_annotations_length,
2170                                        const u1* runtime_visible_type_annotations,
2171                                        int runtime_visible_type_annotations_length,
2172                                        const u1* runtime_invisible_type_annotations,
2173                                        int runtime_invisible_type_annotations_length,
2174                                        const u1* annotation_default,
2175                                        int annotation_default_length,
2176                                        TRAPS) {
2177 
2178   AnnotationArray* a;
2179 
2180   if (runtime_visible_annotations_length +
2181       runtime_invisible_annotations_length > 0) {
2182      a = assemble_annotations(runtime_visible_annotations,
2183                               runtime_visible_annotations_length,
2184                               runtime_invisible_annotations,
2185                               runtime_invisible_annotations_length,
2186                               CHECK);
2187      cm->set_method_annotations(a);
2188   }
2189 
2190   if (runtime_visible_parameter_annotations_length +
2191       runtime_invisible_parameter_annotations_length > 0) {
2192     a = assemble_annotations(runtime_visible_parameter_annotations,
2193                              runtime_visible_parameter_annotations_length,
2194                              runtime_invisible_parameter_annotations,
2195                              runtime_invisible_parameter_annotations_length,
2196                              CHECK);
2197     cm->set_parameter_annotations(a);
2198   }
2199 
2200   if (annotation_default_length > 0) {
2201     a = assemble_annotations(annotation_default,
2202                              annotation_default_length,
2203                              NULL,
2204                              0,
2205                              CHECK);
2206     cm->set_default_annotations(a);
2207   }
2208 
2209   if (runtime_visible_type_annotations_length +
2210       runtime_invisible_type_annotations_length > 0) {
2211     a = assemble_annotations(runtime_visible_type_annotations,
2212                              runtime_visible_type_annotations_length,
2213                              runtime_invisible_type_annotations,
2214                              runtime_invisible_type_annotations_length,
2215                              CHECK);
2216     cm->set_type_annotations(a);
2217   }
2218 }
2219 
2220 
2221 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
2222 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
2223 // Method* to save footprint, so we only know the size of the resulting Method* when the
2224 // entire method attribute is parsed.
2225 //
2226 // The promoted_flags parameter is used to pass relevant access_flags
2227 // from the method back up to the containing klass. These flag values
2228 // are added to klass's access_flags.
2229 
2230 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
2231                                       bool is_interface,
2232                                       const ConstantPool* cp,
2233                                       AccessFlags* const promoted_flags,
2234                                       TRAPS) {
2235   assert(cfs != NULL, "invariant");
2236   assert(cp != NULL, "invariant");
2237   assert(promoted_flags != NULL, "invariant");
2238 
2239   ResourceMark rm(THREAD);
2240   // Parse fixed parts:
2241   // access_flags, name_index, descriptor_index, attributes_count
2242   cfs->guarantee_more(8, CHECK_NULL);
2243 
2244   int flags = cfs->get_u2_fast();
2245   const u2 name_index = cfs->get_u2_fast();
2246   const int cp_size = cp->length();
2247   check_property(
2248     valid_symbol_at(name_index),
2249     "Illegal constant pool index %u for method name in class file %s",
2250     name_index, CHECK_NULL);
2251   const Symbol* const name = cp->symbol_at(name_index);
2252   verify_legal_method_name(name, CHECK_NULL);
2253 
2254   const u2 signature_index = cfs->get_u2_fast();
2255   guarantee_property(
2256     valid_symbol_at(signature_index),
2257     "Illegal constant pool index %u for method signature in class file %s",
2258     signature_index, CHECK_NULL);
2259   const Symbol* const signature = cp->symbol_at(signature_index);
2260 
2261   if (name == vmSymbols::class_initializer_name()) {
2262     // We ignore the other access flags for a valid class initializer.
2263     // (JVM Spec 2nd ed., chapter 4.6)
2264     if (_major_version < 51) { // backward compatibility
2265       flags = JVM_ACC_STATIC;
2266     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
2267       flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
2268     } else {
2269       classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
2270     }
2271   } else {
2272     verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
2273   }
2274 
2275   if (name == vmSymbols::object_initializer_name() && is_interface) {
2276     classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
2277   }
2278 
2279   int args_size = -1;  // only used when _need_verify is true
2280   if (_need_verify) {
2281     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
2282                  verify_legal_method_signature(name, signature, CHECK_NULL);
2283     if (args_size > MAX_ARGS_SIZE) {
2284       classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
2285     }
2286   }
2287 
2288   AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
2289 
2290   // Default values for code and exceptions attribute elements
2291   u2 max_stack = 0;
2292   u2 max_locals = 0;
2293   u4 code_length = 0;
2294   const u1* code_start = 0;
2295   u2 exception_table_length = 0;
2296   const u2* exception_table_start = NULL;
2297   Array<int>* exception_handlers = Universe::the_empty_int_array();
2298   u2 checked_exceptions_length = 0;
2299   const u2* checked_exceptions_start = NULL;
2300   CompressedLineNumberWriteStream* linenumber_table = NULL;
2301   int linenumber_table_length = 0;
2302   int total_lvt_length = 0;
2303   u2 lvt_cnt = 0;
2304   u2 lvtt_cnt = 0;
2305   bool lvt_allocated = false;
2306   u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
2307   u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
2308   u2* localvariable_table_length = NULL;
2309   const u2** localvariable_table_start = NULL;
2310   u2* localvariable_type_table_length = NULL;
2311   const u2** localvariable_type_table_start = NULL;
2312   int method_parameters_length = -1;
2313   const u1* method_parameters_data = NULL;
2314   bool method_parameters_seen = false;
2315   bool parsed_code_attribute = false;
2316   bool parsed_checked_exceptions_attribute = false;
2317   bool parsed_stackmap_attribute = false;
2318   // stackmap attribute - JDK1.5
2319   const u1* stackmap_data = NULL;
2320   int stackmap_data_length = 0;
2321   u2 generic_signature_index = 0;
2322   MethodAnnotationCollector parsed_annotations;
2323   const u1* runtime_visible_annotations = NULL;
2324   int runtime_visible_annotations_length = 0;
2325   const u1* runtime_invisible_annotations = NULL;
2326   int runtime_invisible_annotations_length = 0;
2327   const u1* runtime_visible_parameter_annotations = NULL;
2328   int runtime_visible_parameter_annotations_length = 0;
2329   const u1* runtime_invisible_parameter_annotations = NULL;
2330   int runtime_invisible_parameter_annotations_length = 0;
2331   const u1* runtime_visible_type_annotations = NULL;
2332   int runtime_visible_type_annotations_length = 0;
2333   const u1* runtime_invisible_type_annotations = NULL;
2334   int runtime_invisible_type_annotations_length = 0;
2335   bool runtime_invisible_annotations_exists = false;
2336   bool runtime_invisible_type_annotations_exists = false;
2337   bool runtime_invisible_parameter_annotations_exists = false;
2338   const u1* annotation_default = NULL;
2339   int annotation_default_length = 0;
2340 
2341   // Parse code and exceptions attribute
2342   u2 method_attributes_count = cfs->get_u2_fast();
2343   while (method_attributes_count--) {
2344     cfs->guarantee_more(6, CHECK_NULL);  // method_attribute_name_index, method_attribute_length
2345     const u2 method_attribute_name_index = cfs->get_u2_fast();
2346     const u4 method_attribute_length = cfs->get_u4_fast();
2347     check_property(
2348       valid_symbol_at(method_attribute_name_index),
2349       "Invalid method attribute name index %u in class file %s",
2350       method_attribute_name_index, CHECK_NULL);
2351 
2352     const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index);
2353     if (method_attribute_name == vmSymbols::tag_code()) {
2354       // Parse Code attribute
2355       if (_need_verify) {
2356         guarantee_property(
2357             !access_flags.is_native() && !access_flags.is_abstract(),
2358                         "Code attribute in native or abstract methods in class file %s",
2359                          CHECK_NULL);
2360       }
2361       if (parsed_code_attribute) {
2362         classfile_parse_error("Multiple Code attributes in class file %s",
2363                               CHECK_NULL);
2364       }
2365       parsed_code_attribute = true;
2366 
2367       // Stack size, locals size, and code size
2368       if (_major_version == 45 && _minor_version <= 2) {
2369         cfs->guarantee_more(4, CHECK_NULL);
2370         max_stack = cfs->get_u1_fast();
2371         max_locals = cfs->get_u1_fast();
2372         code_length = cfs->get_u2_fast();
2373       } else {
2374         cfs->guarantee_more(8, CHECK_NULL);
2375         max_stack = cfs->get_u2_fast();
2376         max_locals = cfs->get_u2_fast();
2377         code_length = cfs->get_u4_fast();
2378       }
2379       if (_need_verify) {
2380         guarantee_property(args_size <= max_locals,
2381                            "Arguments can't fit into locals in class file %s",
2382                            CHECK_NULL);
2383         guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
2384                            "Invalid method Code length %u in class file %s",
2385                            code_length, CHECK_NULL);
2386       }
2387       // Code pointer
2388       code_start = cfs->get_u1_buffer();
2389       assert(code_start != NULL, "null code start");
2390       cfs->guarantee_more(code_length, CHECK_NULL);
2391       cfs->skip_u1_fast(code_length);
2392 
2393       // Exception handler table
2394       cfs->guarantee_more(2, CHECK_NULL);  // exception_table_length
2395       exception_table_length = cfs->get_u2_fast();
2396       if (exception_table_length > 0) {
2397         exception_table_start = parse_exception_table(cfs,
2398                                                       code_length,
2399                                                       exception_table_length,
2400                                                       CHECK_NULL);
2401       }
2402 
2403       // Parse additional attributes in code attribute
2404       cfs->guarantee_more(2, CHECK_NULL);  // code_attributes_count
2405       u2 code_attributes_count = cfs->get_u2_fast();
2406 
2407       unsigned int calculated_attribute_length = 0;
2408 
2409       if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
2410         calculated_attribute_length =
2411             sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
2412       } else {
2413         // max_stack, locals and length are smaller in pre-version 45.2 classes
2414         calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
2415       }
2416       calculated_attribute_length +=
2417         code_length +
2418         sizeof(exception_table_length) +
2419         sizeof(code_attributes_count) +
2420         exception_table_length *
2421             ( sizeof(u2) +   // start_pc
2422               sizeof(u2) +   // end_pc
2423               sizeof(u2) +   // handler_pc
2424               sizeof(u2) );  // catch_type_index
2425 
2426       while (code_attributes_count--) {
2427         cfs->guarantee_more(6, CHECK_NULL);  // code_attribute_name_index, code_attribute_length
2428         const u2 code_attribute_name_index = cfs->get_u2_fast();
2429         const u4 code_attribute_length = cfs->get_u4_fast();
2430         calculated_attribute_length += code_attribute_length +
2431                                        sizeof(code_attribute_name_index) +
2432                                        sizeof(code_attribute_length);
2433         check_property(valid_symbol_at(code_attribute_name_index),
2434                        "Invalid code attribute name index %u in class file %s",
2435                        code_attribute_name_index,
2436                        CHECK_NULL);
2437         if (LoadLineNumberTables &&
2438             cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
2439           // Parse and compress line number table
2440           parse_linenumber_table(code_attribute_length,
2441                                  code_length,
2442                                  &linenumber_table,
2443                                  CHECK_NULL);
2444 
2445         } else if (LoadLocalVariableTables &&
2446                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
2447           // Parse local variable table
2448           if (!lvt_allocated) {
2449             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2450               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2451             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2452               THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2453             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2454               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2455             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2456               THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2457             lvt_allocated = true;
2458           }
2459           if (lvt_cnt == max_lvt_cnt) {
2460             max_lvt_cnt <<= 1;
2461             localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
2462             localvariable_table_start  = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
2463           }
2464           localvariable_table_start[lvt_cnt] =
2465             parse_localvariable_table(cfs,
2466                                       code_length,
2467                                       max_locals,
2468                                       code_attribute_length,
2469                                       &localvariable_table_length[lvt_cnt],
2470                                       false,    // is not LVTT
2471                                       CHECK_NULL);
2472           total_lvt_length += localvariable_table_length[lvt_cnt];
2473           lvt_cnt++;
2474         } else if (LoadLocalVariableTypeTables &&
2475                    _major_version >= JAVA_1_5_VERSION &&
2476                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
2477           if (!lvt_allocated) {
2478             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2479               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2480             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2481               THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2482             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
2483               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
2484             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
2485               THREAD, const u2*, INITIAL_MAX_LVT_NUMBER);
2486             lvt_allocated = true;
2487           }
2488           // Parse local variable type table
2489           if (lvtt_cnt == max_lvtt_cnt) {
2490             max_lvtt_cnt <<= 1;
2491             localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
2492             localvariable_type_table_start  = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
2493           }
2494           localvariable_type_table_start[lvtt_cnt] =
2495             parse_localvariable_table(cfs,
2496                                       code_length,
2497                                       max_locals,
2498                                       code_attribute_length,
2499                                       &localvariable_type_table_length[lvtt_cnt],
2500                                       true,     // is LVTT
2501                                       CHECK_NULL);
2502           lvtt_cnt++;
2503         } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
2504                    cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
2505           // Stack map is only needed by the new verifier in JDK1.5.
2506           if (parsed_stackmap_attribute) {
2507             classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL);
2508           }
2509           stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
2510           stackmap_data_length = code_attribute_length;
2511           parsed_stackmap_attribute = true;
2512         } else {
2513           // Skip unknown attributes
2514           cfs->skip_u1(code_attribute_length, CHECK_NULL);
2515         }
2516       }
2517       // check method attribute length
2518       if (_need_verify) {
2519         guarantee_property(method_attribute_length == calculated_attribute_length,
2520                            "Code segment has wrong length in class file %s",
2521                            CHECK_NULL);
2522       }
2523     } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
2524       // Parse Exceptions attribute
2525       if (parsed_checked_exceptions_attribute) {
2526         classfile_parse_error("Multiple Exceptions attributes in class file %s",
2527                               CHECK_NULL);
2528       }
2529       parsed_checked_exceptions_attribute = true;
2530       checked_exceptions_start =
2531             parse_checked_exceptions(cfs,
2532                                      &checked_exceptions_length,
2533                                      method_attribute_length,
2534                                      CHECK_NULL);
2535     } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
2536       // reject multiple method parameters
2537       if (method_parameters_seen) {
2538         classfile_parse_error("Multiple MethodParameters attributes in class file %s",
2539                               CHECK_NULL);
2540       }
2541       method_parameters_seen = true;
2542       method_parameters_length = cfs->get_u1_fast();
2543       const u2 real_length = (method_parameters_length * 4u) + 1u;
2544       if (method_attribute_length != real_length) {
2545         classfile_parse_error(
2546           "Invalid MethodParameters method attribute length %u in class file",
2547           method_attribute_length, CHECK_NULL);
2548       }
2549       method_parameters_data = cfs->get_u1_buffer();
2550       cfs->skip_u2_fast(method_parameters_length);
2551       cfs->skip_u2_fast(method_parameters_length);
2552       // ignore this attribute if it cannot be reflected
2553       if (!SystemDictionary::Parameter_klass_loaded())
2554         method_parameters_length = -1;
2555     } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
2556       if (method_attribute_length != 0) {
2557         classfile_parse_error(
2558           "Invalid Synthetic method attribute length %u in class file %s",
2559           method_attribute_length, CHECK_NULL);
2560       }
2561       // Should we check that there hasn't already been a synthetic attribute?
2562       access_flags.set_is_synthetic();
2563     } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
2564       if (method_attribute_length != 0) {
2565         classfile_parse_error(
2566           "Invalid Deprecated method attribute length %u in class file %s",
2567           method_attribute_length, CHECK_NULL);
2568       }
2569     } else if (_major_version >= JAVA_1_5_VERSION) {
2570       if (method_attribute_name == vmSymbols::tag_signature()) {
2571         if (method_attribute_length != 2) {
2572           classfile_parse_error(
2573             "Invalid Signature attribute length %u in class file %s",
2574             method_attribute_length, CHECK_NULL);
2575         }
2576         generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
2577       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
2578         if (runtime_visible_annotations != NULL) {
2579           classfile_parse_error(
2580             "Multiple RuntimeVisibleAnnotations attributes for method in class file %s",
2581             CHECK_NULL);
2582         }
2583         runtime_visible_annotations_length = method_attribute_length;
2584         runtime_visible_annotations = cfs->get_u1_buffer();
2585         assert(runtime_visible_annotations != NULL, "null visible annotations");
2586         cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
2587         parse_annotations(cp,
2588                           runtime_visible_annotations,
2589                           runtime_visible_annotations_length,
2590                           &parsed_annotations,
2591                           _loader_data,
2592                           CHECK_NULL);
2593         cfs->skip_u1_fast(runtime_visible_annotations_length);
2594       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
2595         if (runtime_invisible_annotations_exists) {
2596           classfile_parse_error(
2597             "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s",
2598             CHECK_NULL);
2599         }
2600         runtime_invisible_annotations_exists = true;
2601         if (PreserveAllAnnotations) {
2602           runtime_invisible_annotations_length = method_attribute_length;
2603           runtime_invisible_annotations = cfs->get_u1_buffer();
2604           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
2605         }
2606         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2607       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
2608         if (runtime_visible_parameter_annotations != NULL) {
2609           classfile_parse_error(
2610             "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s",
2611             CHECK_NULL);
2612         }
2613         runtime_visible_parameter_annotations_length = method_attribute_length;
2614         runtime_visible_parameter_annotations = cfs->get_u1_buffer();
2615         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
2616         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
2617       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
2618         if (runtime_invisible_parameter_annotations_exists) {
2619           classfile_parse_error(
2620             "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s",
2621             CHECK_NULL);
2622         }
2623         runtime_invisible_parameter_annotations_exists = true;
2624         if (PreserveAllAnnotations) {
2625           runtime_invisible_parameter_annotations_length = method_attribute_length;
2626           runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
2627           assert(runtime_invisible_parameter_annotations != NULL,
2628             "null invisible parameter annotations");
2629         }
2630         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2631       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
2632         if (annotation_default != NULL) {
2633           classfile_parse_error(
2634             "Multiple AnnotationDefault attributes for method in class file %s",
2635             CHECK_NULL);
2636         }
2637         annotation_default_length = method_attribute_length;
2638         annotation_default = cfs->get_u1_buffer();
2639         assert(annotation_default != NULL, "null annotation default");
2640         cfs->skip_u1(annotation_default_length, CHECK_NULL);
2641       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
2642         if (runtime_visible_type_annotations != NULL) {
2643           classfile_parse_error(
2644             "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
2645             CHECK_NULL);
2646         }
2647         runtime_visible_type_annotations_length = method_attribute_length;
2648         runtime_visible_type_annotations = cfs->get_u1_buffer();
2649         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
2650         // No need for the VM to parse Type annotations
2651         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL);
2652       } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
2653         if (runtime_invisible_type_annotations_exists) {
2654           classfile_parse_error(
2655             "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
2656             CHECK_NULL);
2657         } else {
2658           runtime_invisible_type_annotations_exists = true;
2659         }
2660         if (PreserveAllAnnotations) {
2661           runtime_invisible_type_annotations_length = method_attribute_length;
2662           runtime_invisible_type_annotations = cfs->get_u1_buffer();
2663           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
2664         }
2665         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2666       } else {
2667         // Skip unknown attributes
2668         cfs->skip_u1(method_attribute_length, CHECK_NULL);
2669       }
2670     } else {
2671       // Skip unknown attributes
2672       cfs->skip_u1(method_attribute_length, CHECK_NULL);
2673     }
2674   }
2675 
2676   if (linenumber_table != NULL) {
2677     linenumber_table->write_terminator();
2678     linenumber_table_length = linenumber_table->position();
2679   }
2680 
2681   // Make sure there's at least one Code attribute in non-native/non-abstract method
2682   if (_need_verify) {
2683     guarantee_property(access_flags.is_native() ||
2684                        access_flags.is_abstract() ||
2685                        parsed_code_attribute,
2686                        "Absent Code attribute in method that is not native or abstract in class file %s",
2687                        CHECK_NULL);
2688   }
2689 
2690   // All sizing information for a Method* is finally available, now create it
2691   InlineTableSizes sizes(
2692       total_lvt_length,
2693       linenumber_table_length,
2694       exception_table_length,
2695       checked_exceptions_length,
2696       method_parameters_length,
2697       generic_signature_index,
2698       runtime_visible_annotations_length +
2699            runtime_invisible_annotations_length,
2700       runtime_visible_parameter_annotations_length +
2701            runtime_invisible_parameter_annotations_length,
2702       runtime_visible_type_annotations_length +
2703            runtime_invisible_type_annotations_length,
2704       annotation_default_length,
2705       0);
2706 
2707   Method* const m = Method::allocate(_loader_data,
2708                                      code_length,
2709                                      access_flags,
2710                                      &sizes,
2711                                      ConstMethod::NORMAL,
2712                                      CHECK_NULL);
2713 
2714   ClassLoadingService::add_class_method_size(m->size()*wordSize);
2715 
2716   // Fill in information from fixed part (access_flags already set)
2717   m->set_constants(_cp);
2718   m->set_name_index(name_index);
2719   m->set_signature_index(signature_index);
2720 
2721   ResultTypeFinder rtf(cp->symbol_at(signature_index));
2722   m->constMethod()->set_result_type(rtf.type());
2723 
2724   if (args_size >= 0) {
2725     m->set_size_of_parameters(args_size);
2726   } else {
2727     m->compute_size_of_parameters(THREAD);
2728   }
2729 #ifdef ASSERT
2730   if (args_size >= 0) {
2731     m->compute_size_of_parameters(THREAD);
2732     assert(args_size == m->size_of_parameters(), "");
2733   }
2734 #endif
2735 
2736   // Fill in code attribute information
2737   m->set_max_stack(max_stack);
2738   m->set_max_locals(max_locals);
2739   if (stackmap_data != NULL) {
2740     m->constMethod()->copy_stackmap_data(_loader_data,
2741                                          (u1*)stackmap_data,
2742                                          stackmap_data_length,
2743                                          CHECK_NULL);
2744   }
2745 
2746   // Copy byte codes
2747   m->set_code((u1*)code_start);
2748 
2749   // Copy line number table
2750   if (linenumber_table != NULL) {
2751     memcpy(m->compressed_linenumber_table(),
2752            linenumber_table->buffer(),
2753            linenumber_table_length);
2754   }
2755 
2756   // Copy exception table
2757   if (exception_table_length > 0) {
2758     int size =
2759       exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
2760     copy_u2_with_conversion((u2*) m->exception_table_start(),
2761                             exception_table_start, size);
2762   }
2763 
2764   // Copy method parameters
2765   if (method_parameters_length > 0) {
2766     MethodParametersElement* elem = m->constMethod()->method_parameters_start();
2767     for (int i = 0; i < method_parameters_length; i++) {
2768       elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data);
2769       method_parameters_data += 2;
2770       elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
2771       method_parameters_data += 2;
2772     }
2773   }
2774 
2775   // Copy checked exceptions
2776   if (checked_exceptions_length > 0) {
2777     const int size =
2778       checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
2779     copy_u2_with_conversion((u2*) m->checked_exceptions_start(),
2780                             checked_exceptions_start,
2781                             size);
2782   }
2783 
2784   // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
2785   if (total_lvt_length > 0) {
2786     promoted_flags->set_has_localvariable_table();
2787     copy_localvariable_table(m->constMethod(),
2788                              lvt_cnt,
2789                              localvariable_table_length,
2790                              localvariable_table_start,
2791                              lvtt_cnt,
2792                              localvariable_type_table_length,
2793                              localvariable_type_table_start,
2794                              CHECK_NULL);
2795   }
2796 
2797   if (parsed_annotations.has_any_annotations())
2798     parsed_annotations.apply_to(m);
2799 
2800   // Copy annotations
2801   copy_method_annotations(m->constMethod(),
2802                           runtime_visible_annotations,
2803                           runtime_visible_annotations_length,
2804                           runtime_invisible_annotations,
2805                           runtime_invisible_annotations_length,
2806                           runtime_visible_parameter_annotations,
2807                           runtime_visible_parameter_annotations_length,
2808                           runtime_invisible_parameter_annotations,
2809                           runtime_invisible_parameter_annotations_length,
2810                           runtime_visible_type_annotations,
2811                           runtime_visible_type_annotations_length,
2812                           runtime_invisible_type_annotations,
2813                           runtime_invisible_type_annotations_length,
2814                           annotation_default,
2815                           annotation_default_length,
2816                           CHECK_NULL);
2817 
2818   if (name == vmSymbols::finalize_method_name() &&
2819       signature == vmSymbols::void_method_signature()) {
2820     if (m->is_empty_method()) {
2821       _has_empty_finalizer = true;
2822     } else {
2823       _has_finalizer = true;
2824     }
2825   }
2826   if (name == vmSymbols::object_initializer_name() &&
2827       signature == vmSymbols::void_method_signature() &&
2828       m->is_vanilla_constructor()) {
2829     _has_vanilla_constructor = true;
2830   }
2831 
2832   NOT_PRODUCT(m->verify());
2833   return m;
2834 }
2835 
2836 
2837 // The promoted_flags parameter is used to pass relevant access_flags
2838 // from the methods back up to the containing klass. These flag values
2839 // are added to klass's access_flags.
2840 // Side-effects: populates the _methods field in the parser
2841 void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
2842                                     bool is_interface,
2843                                     AccessFlags* promoted_flags,
2844                                     bool* has_final_method,
2845                                     bool* declares_nonstatic_concrete_methods,
2846                                     TRAPS) {
2847   assert(cfs != NULL, "invariant");
2848   assert(promoted_flags != NULL, "invariant");
2849   assert(has_final_method != NULL, "invariant");
2850   assert(declares_nonstatic_concrete_methods != NULL, "invariant");
2851 
2852   assert(NULL == _methods, "invariant");
2853 
2854   cfs->guarantee_more(2, CHECK);  // length
2855   const u2 length = cfs->get_u2_fast();
2856   if (length == 0) {
2857     _methods = Universe::the_empty_method_array();
2858   } else {
2859     _methods = MetadataFactory::new_array<Method*>(_loader_data,
2860                                                    length,
2861                                                    NULL,
2862                                                    CHECK);
2863 
2864     for (int index = 0; index < length; index++) {
2865       Method* method = parse_method(cfs,
2866                                     is_interface,
2867                                     _cp,
2868                                     promoted_flags,
2869                                     CHECK);
2870 
2871       if (method->is_final()) {
2872         *has_final_method = true;
2873       }
2874       // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
2875       // used for interface initialization, and default method inheritance analysis
2876       if (is_interface && !(*declares_nonstatic_concrete_methods)
2877         && !method->is_abstract() && !method->is_static()) {
2878         *declares_nonstatic_concrete_methods = true;
2879       }
2880       _methods->at_put(index, method);
2881     }
2882 
2883     if (_need_verify && length > 1) {
2884       // Check duplicated methods
2885       ResourceMark rm(THREAD);
2886       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
2887         THREAD, NameSigHash*, HASH_ROW_SIZE);
2888       initialize_hashtable(names_and_sigs);
2889       bool dup = false;
2890       const Symbol* name = NULL;
2891       const Symbol* sig = NULL;
2892       {
2893         debug_only(NoSafepointVerifier nsv;)
2894         for (int i = 0; i < length; i++) {
2895           const Method* const m = _methods->at(i);
2896           name = m->name();
2897           sig = m->signature();
2898           // If no duplicates, add name/signature in hashtable names_and_sigs.
2899           if (!put_after_lookup(name, sig, names_and_sigs)) {
2900             dup = true;
2901             break;
2902           }
2903         }
2904       }
2905       if (dup) {
2906         classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s",
2907                                name->as_C_string(), sig->as_klass_external_name(), CHECK);
2908       }
2909     }
2910   }
2911 }
2912 
2913 static const intArray* sort_methods(Array<Method*>* methods) {
2914   const int length = methods->length();
2915   // If JVMTI original method ordering or sharing is enabled we have to
2916   // remember the original class file ordering.
2917   // We temporarily use the vtable_index field in the Method* to store the
2918   // class file index, so we can read in after calling qsort.
2919   // Put the method ordering in the shared archive.
2920   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2921     for (int index = 0; index < length; index++) {
2922       Method* const m = methods->at(index);
2923       assert(!m->valid_vtable_index(), "vtable index should not be set");
2924       m->set_vtable_index(index);
2925     }
2926   }
2927   // Sort method array by ascending method name (for faster lookups & vtable construction)
2928   // Note that the ordering is not alphabetical, see Symbol::fast_compare
2929   Method::sort_methods(methods);
2930 
2931   intArray* method_ordering = NULL;
2932   // If JVMTI original method ordering or sharing is enabled construct int
2933   // array remembering the original ordering
2934   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
2935     method_ordering = new intArray(length, length, -1);
2936     for (int index = 0; index < length; index++) {
2937       Method* const m = methods->at(index);
2938       const int old_index = m->vtable_index();
2939       assert(old_index >= 0 && old_index < length, "invalid method index");
2940       method_ordering->at_put(index, old_index);
2941       m->set_vtable_index(Method::invalid_vtable_index);
2942     }
2943   }
2944   return method_ordering;
2945 }
2946 
2947 // Parse generic_signature attribute for methods and fields
2948 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs,
2949                                                       TRAPS) {
2950   assert(cfs != NULL, "invariant");
2951 
2952   cfs->guarantee_more(2, CHECK_0);  // generic_signature_index
2953   const u2 generic_signature_index = cfs->get_u2_fast();
2954   check_property(
2955     valid_symbol_at(generic_signature_index),
2956     "Invalid Signature attribute at constant pool index %u in class file %s",
2957     generic_signature_index, CHECK_0);
2958   return generic_signature_index;
2959 }
2960 
2961 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs,
2962                                                            TRAPS) {
2963 
2964   assert(cfs != NULL, "invariant");
2965 
2966   cfs->guarantee_more(2, CHECK);  // sourcefile_index
2967   const u2 sourcefile_index = cfs->get_u2_fast();
2968   check_property(
2969     valid_symbol_at(sourcefile_index),
2970     "Invalid SourceFile attribute at constant pool index %u in class file %s",
2971     sourcefile_index, CHECK);
2972   set_class_sourcefile_index(sourcefile_index);
2973 }
2974 
2975 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs,
2976                                                                        int length,
2977                                                                        TRAPS) {
2978   assert(cfs != NULL, "invariant");
2979 
2980   const u1* const sde_buffer = cfs->get_u1_buffer();
2981   assert(sde_buffer != NULL, "null sde buffer");
2982 
2983   // Don't bother storing it if there is no way to retrieve it
2984   if (JvmtiExport::can_get_source_debug_extension()) {
2985     assert((length+1) > length, "Overflow checking");
2986     u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
2987     for (int i = 0; i < length; i++) {
2988       sde[i] = sde_buffer[i];
2989     }
2990     sde[length] = '\0';
2991     set_class_sde_buffer((const char*)sde, length);
2992   }
2993   // Got utf8 string, set stream position forward
2994   cfs->skip_u1(length, CHECK);
2995 }
2996 
2997 
2998 // Inner classes can be static, private or protected (classic VM does this)
2999 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \
3000                                            JVM_ACC_PRIVATE |                \
3001                                            JVM_ACC_PROTECTED |              \
3002                                            JVM_ACC_STATIC                   \
3003                                          )
3004 
3005 // Return number of classes in the inner classes attribute table
3006 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs,
3007                                                             const u1* const inner_classes_attribute_start,
3008                                                             bool parsed_enclosingmethod_attribute,
3009                                                             u2 enclosing_method_class_index,
3010                                                             u2 enclosing_method_method_index,
3011                                                             TRAPS) {
3012   const u1* const current_mark = cfs->current();
3013   u2 length = 0;
3014   if (inner_classes_attribute_start != NULL) {
3015     cfs->set_current(inner_classes_attribute_start);
3016     cfs->guarantee_more(2, CHECK_0);  // length
3017     length = cfs->get_u2_fast();
3018   }
3019 
3020   // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
3021   // method data:
3022   //   [inner_class_info_index,
3023   //    outer_class_info_index,
3024   //    inner_name_index,
3025   //    inner_class_access_flags,
3026   //    ...
3027   //    enclosing_method_class_index,
3028   //    enclosing_method_method_index]
3029   const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
3030   Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
3031   _inner_classes = inner_classes;
3032 
3033   int index = 0;
3034   const int cp_size = _cp->length();
3035   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
3036   for (int n = 0; n < length; n++) {
3037     // Inner class index
3038     const u2 inner_class_info_index = cfs->get_u2_fast();
3039     check_property(
3040       valid_klass_reference_at(inner_class_info_index),
3041       "inner_class_info_index %u has bad constant type in class file %s",
3042       inner_class_info_index, CHECK_0);
3043     // Outer class index
3044     const u2 outer_class_info_index = cfs->get_u2_fast();
3045     check_property(
3046       outer_class_info_index == 0 ||
3047         valid_klass_reference_at(outer_class_info_index),
3048       "outer_class_info_index %u has bad constant type in class file %s",
3049       outer_class_info_index, CHECK_0);
3050     // Inner class name
3051     const u2 inner_name_index = cfs->get_u2_fast();
3052     check_property(
3053       inner_name_index == 0 || valid_symbol_at(inner_name_index),
3054       "inner_name_index %u has bad constant type in class file %s",
3055       inner_name_index, CHECK_0);
3056     if (_need_verify) {
3057       guarantee_property(inner_class_info_index != outer_class_info_index,
3058                          "Class is both outer and inner class in class file %s", CHECK_0);
3059     }
3060     // Access flags
3061     jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
3062     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
3063       // Set abstract bit for old class files for backward compatibility
3064       flags |= JVM_ACC_ABSTRACT;
3065     }
3066     verify_legal_class_modifiers(flags, CHECK_0);
3067     AccessFlags inner_access_flags(flags);
3068 
3069     inner_classes->at_put(index++, inner_class_info_index);
3070     inner_classes->at_put(index++, outer_class_info_index);
3071     inner_classes->at_put(index++, inner_name_index);
3072     inner_classes->at_put(index++, inner_access_flags.as_short());
3073   }
3074 
3075   // 4347400: make sure there's no duplicate entry in the classes array
3076   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
3077     for(int i = 0; i < length * 4; i += 4) {
3078       for(int j = i + 4; j < length * 4; j += 4) {
3079         guarantee_property((inner_classes->at(i)   != inner_classes->at(j) ||
3080                             inner_classes->at(i+1) != inner_classes->at(j+1) ||
3081                             inner_classes->at(i+2) != inner_classes->at(j+2) ||
3082                             inner_classes->at(i+3) != inner_classes->at(j+3)),
3083                             "Duplicate entry in InnerClasses in class file %s",
3084                             CHECK_0);
3085       }
3086     }
3087   }
3088 
3089   // Set EnclosingMethod class and method indexes.
3090   if (parsed_enclosingmethod_attribute) {
3091     inner_classes->at_put(index++, enclosing_method_class_index);
3092     inner_classes->at_put(index++, enclosing_method_method_index);
3093   }
3094   assert(index == size, "wrong size");
3095 
3096   // Restore buffer's current position.
3097   cfs->set_current(current_mark);
3098 
3099   return length;
3100 }
3101 
3102 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
3103   set_class_synthetic_flag(true);
3104 }
3105 
3106 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) {
3107   assert(cfs != NULL, "invariant");
3108 
3109   const u2 signature_index = cfs->get_u2(CHECK);
3110   check_property(
3111     valid_symbol_at(signature_index),
3112     "Invalid constant pool index %u in Signature attribute in class file %s",
3113     signature_index, CHECK);
3114   set_class_generic_signature_index(signature_index);
3115 }
3116 
3117 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs,
3118                                                                   ConstantPool* cp,
3119                                                                   u4 attribute_byte_length,
3120                                                                   TRAPS) {
3121   assert(cfs != NULL, "invariant");
3122   assert(cp != NULL, "invariant");
3123 
3124   const u1* const current_start = cfs->current();
3125 
3126   guarantee_property(attribute_byte_length >= sizeof(u2),
3127                      "Invalid BootstrapMethods attribute length %u in class file %s",
3128                      attribute_byte_length,
3129                      CHECK);
3130 
3131   cfs->guarantee_more(attribute_byte_length, CHECK);
3132 
3133   const int attribute_array_length = cfs->get_u2_fast();
3134 
3135   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
3136                      "Short length on BootstrapMethods in class file %s",
3137                      CHECK);
3138 
3139 
3140   // The attribute contains a counted array of counted tuples of shorts,
3141   // represending bootstrap specifiers:
3142   //    length*{bootstrap_method_index, argument_count*{argument_index}}
3143   const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
3144   // operand_count = number of shorts in attr, except for leading length
3145 
3146   // The attribute is copied into a short[] array.
3147   // The array begins with a series of short[2] pairs, one for each tuple.
3148   const int index_size = (attribute_array_length * 2);
3149 
3150   Array<u2>* const operands =
3151     MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
3152 
3153   // Eagerly assign operands so they will be deallocated with the constant
3154   // pool if there is an error.
3155   cp->set_operands(operands);
3156 
3157   int operand_fill_index = index_size;
3158   const int cp_size = cp->length();
3159 
3160   for (int n = 0; n < attribute_array_length; n++) {
3161     // Store a 32-bit offset into the header of the operand array.
3162     ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
3163 
3164     // Read a bootstrap specifier.
3165     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
3166     const u2 bootstrap_method_index = cfs->get_u2_fast();
3167     const u2 argument_count = cfs->get_u2_fast();
3168     check_property(
3169       valid_cp_range(bootstrap_method_index, cp_size) &&
3170       cp->tag_at(bootstrap_method_index).is_method_handle(),
3171       "bootstrap_method_index %u has bad constant type in class file %s",
3172       bootstrap_method_index,
3173       CHECK);
3174 
3175     guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
3176       "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
3177       CHECK);
3178 
3179     operands->at_put(operand_fill_index++, bootstrap_method_index);
3180     operands->at_put(operand_fill_index++, argument_count);
3181 
3182     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
3183     for (int j = 0; j < argument_count; j++) {
3184       const u2 argument_index = cfs->get_u2_fast();
3185       check_property(
3186         valid_cp_range(argument_index, cp_size) &&
3187         cp->tag_at(argument_index).is_loadable_constant(),
3188         "argument_index %u has bad constant type in class file %s",
3189         argument_index,
3190         CHECK);
3191       operands->at_put(operand_fill_index++, argument_index);
3192     }
3193   }
3194   guarantee_property(current_start + attribute_byte_length == cfs->current(),
3195                      "Bad length on BootstrapMethods in class file %s",
3196                      CHECK);
3197 }
3198 
3199 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
3200                                                  ConstantPool* cp,
3201                  ClassFileParser::ClassAnnotationCollector* parsed_annotations,
3202                                                  TRAPS) {
3203   assert(cfs != NULL, "invariant");
3204   assert(cp != NULL, "invariant");
3205   assert(parsed_annotations != NULL, "invariant");
3206 
3207   // Set inner classes attribute to default sentinel
3208   _inner_classes = Universe::the_empty_short_array();
3209   cfs->guarantee_more(2, CHECK);  // attributes_count
3210   u2 attributes_count = cfs->get_u2_fast();
3211   bool parsed_sourcefile_attribute = false;
3212   bool parsed_innerclasses_attribute = false;
3213   bool parsed_enclosingmethod_attribute = false;
3214   bool parsed_bootstrap_methods_attribute = false;
3215   const u1* runtime_visible_annotations = NULL;
3216   int runtime_visible_annotations_length = 0;
3217   const u1* runtime_invisible_annotations = NULL;
3218   int runtime_invisible_annotations_length = 0;
3219   const u1* runtime_visible_type_annotations = NULL;
3220   int runtime_visible_type_annotations_length = 0;
3221   const u1* runtime_invisible_type_annotations = NULL;
3222   int runtime_invisible_type_annotations_length = 0;
3223   bool runtime_invisible_type_annotations_exists = false;
3224   bool runtime_invisible_annotations_exists = false;
3225   bool parsed_source_debug_ext_annotations_exist = false;
3226   const u1* inner_classes_attribute_start = NULL;
3227   u4  inner_classes_attribute_length = 0;
3228   u2  enclosing_method_class_index = 0;
3229   u2  enclosing_method_method_index = 0;
3230   // Iterate over attributes
3231   while (attributes_count--) {
3232     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
3233     const u2 attribute_name_index = cfs->get_u2_fast();
3234     const u4 attribute_length = cfs->get_u4_fast();
3235     check_property(
3236       valid_symbol_at(attribute_name_index),
3237       "Attribute name has bad constant pool index %u in class file %s",
3238       attribute_name_index, CHECK);
3239     const Symbol* const tag = cp->symbol_at(attribute_name_index);
3240     if (tag == vmSymbols::tag_source_file()) {
3241       // Check for SourceFile tag
3242       if (_need_verify) {
3243         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
3244       }
3245       if (parsed_sourcefile_attribute) {
3246         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
3247       } else {
3248         parsed_sourcefile_attribute = true;
3249       }
3250       parse_classfile_sourcefile_attribute(cfs, CHECK);
3251     } else if (tag == vmSymbols::tag_source_debug_extension()) {
3252       // Check for SourceDebugExtension tag
3253       if (parsed_source_debug_ext_annotations_exist) {
3254           classfile_parse_error(
3255             "Multiple SourceDebugExtension attributes in class file %s", CHECK);
3256       }
3257       parsed_source_debug_ext_annotations_exist = true;
3258       parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK);
3259     } else if (tag == vmSymbols::tag_inner_classes()) {
3260       // Check for InnerClasses tag
3261       if (parsed_innerclasses_attribute) {
3262         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
3263       } else {
3264         parsed_innerclasses_attribute = true;
3265       }
3266       inner_classes_attribute_start = cfs->get_u1_buffer();
3267       inner_classes_attribute_length = attribute_length;
3268       cfs->skip_u1(inner_classes_attribute_length, CHECK);
3269     } else if (tag == vmSymbols::tag_synthetic()) {
3270       // Check for Synthetic tag
3271       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
3272       if (attribute_length != 0) {
3273         classfile_parse_error(
3274           "Invalid Synthetic classfile attribute length %u in class file %s",
3275           attribute_length, CHECK);
3276       }
3277       parse_classfile_synthetic_attribute(CHECK);
3278     } else if (tag == vmSymbols::tag_deprecated()) {
3279       // Check for Deprecatd tag - 4276120
3280       if (attribute_length != 0) {
3281         classfile_parse_error(
3282           "Invalid Deprecated classfile attribute length %u in class file %s",
3283           attribute_length, CHECK);
3284       }
3285     } else if (_major_version >= JAVA_1_5_VERSION) {
3286       if (tag == vmSymbols::tag_signature()) {
3287         if (attribute_length != 2) {
3288           classfile_parse_error(
3289             "Wrong Signature attribute length %u in class file %s",
3290             attribute_length, CHECK);
3291         }
3292         parse_classfile_signature_attribute(cfs, CHECK);
3293       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
3294         if (runtime_visible_annotations != NULL) {
3295           classfile_parse_error(
3296             "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
3297         }
3298         runtime_visible_annotations_length = attribute_length;
3299         runtime_visible_annotations = cfs->get_u1_buffer();
3300         assert(runtime_visible_annotations != NULL, "null visible annotations");
3301         cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
3302         parse_annotations(cp,
3303                           runtime_visible_annotations,
3304                           runtime_visible_annotations_length,
3305                           parsed_annotations,
3306                           _loader_data,
3307                           CHECK);
3308         cfs->skip_u1_fast(runtime_visible_annotations_length);
3309       } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
3310         if (runtime_invisible_annotations_exists) {
3311           classfile_parse_error(
3312             "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
3313         }
3314         runtime_invisible_annotations_exists = true;
3315         if (PreserveAllAnnotations) {
3316           runtime_invisible_annotations_length = attribute_length;
3317           runtime_invisible_annotations = cfs->get_u1_buffer();
3318           assert(runtime_invisible_annotations != NULL, "null invisible annotations");
3319         }
3320         cfs->skip_u1(attribute_length, CHECK);
3321       } else if (tag == vmSymbols::tag_enclosing_method()) {
3322         if (parsed_enclosingmethod_attribute) {
3323           classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
3324         } else {
3325           parsed_enclosingmethod_attribute = true;
3326         }
3327         guarantee_property(attribute_length == 4,
3328           "Wrong EnclosingMethod attribute length %u in class file %s",
3329           attribute_length, CHECK);
3330         cfs->guarantee_more(4, CHECK);  // class_index, method_index
3331         enclosing_method_class_index  = cfs->get_u2_fast();
3332         enclosing_method_method_index = cfs->get_u2_fast();
3333         if (enclosing_method_class_index == 0) {
3334           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
3335         }
3336         // Validate the constant pool indices and types
3337         check_property(valid_klass_reference_at(enclosing_method_class_index),
3338           "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
3339         if (enclosing_method_method_index != 0 &&
3340             (!cp->is_within_bounds(enclosing_method_method_index) ||
3341              !cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
3342           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
3343         }
3344       } else if (tag == vmSymbols::tag_bootstrap_methods() &&
3345                  _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
3346         if (parsed_bootstrap_methods_attribute) {
3347           classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
3348         }
3349         parsed_bootstrap_methods_attribute = true;
3350         parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK);
3351       } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
3352         if (runtime_visible_type_annotations != NULL) {
3353           classfile_parse_error(
3354             "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
3355         }
3356         runtime_visible_type_annotations_length = attribute_length;
3357         runtime_visible_type_annotations = cfs->get_u1_buffer();
3358         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
3359         // No need for the VM to parse Type annotations
3360         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
3361       } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
3362         if (runtime_invisible_type_annotations_exists) {
3363           classfile_parse_error(
3364             "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
3365         } else {
3366           runtime_invisible_type_annotations_exists = true;
3367         }
3368         if (PreserveAllAnnotations) {
3369           runtime_invisible_type_annotations_length = attribute_length;
3370           runtime_invisible_type_annotations = cfs->get_u1_buffer();
3371           assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
3372         }
3373         cfs->skip_u1(attribute_length, CHECK);
3374       } else {
3375         // Unknown attribute
3376         cfs->skip_u1(attribute_length, CHECK);
3377       }
3378     } else {
3379       // Unknown attribute
3380       cfs->skip_u1(attribute_length, CHECK);
3381     }
3382   }
3383   _annotations = assemble_annotations(runtime_visible_annotations,
3384                                       runtime_visible_annotations_length,
3385                                       runtime_invisible_annotations,
3386                                       runtime_invisible_annotations_length,
3387                                       CHECK);
3388   _type_annotations = assemble_annotations(runtime_visible_type_annotations,
3389                                            runtime_visible_type_annotations_length,
3390                                            runtime_invisible_type_annotations,
3391                                            runtime_invisible_type_annotations_length,
3392                                            CHECK);
3393 
3394   if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
3395     const u2 num_of_classes = parse_classfile_inner_classes_attribute(
3396                             cfs,
3397                             inner_classes_attribute_start,
3398                             parsed_innerclasses_attribute,
3399                             enclosing_method_class_index,
3400                             enclosing_method_method_index,
3401                             CHECK);
3402     if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
3403       guarantee_property(
3404         inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
3405         "Wrong InnerClasses attribute length in class file %s", CHECK);
3406     }
3407   }
3408 
3409   if (_max_bootstrap_specifier_index >= 0) {
3410     guarantee_property(parsed_bootstrap_methods_attribute,
3411                        "Missing BootstrapMethods attribute in class file %s", CHECK);
3412   }
3413 }
3414 
3415 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) {
3416   assert(k != NULL, "invariant");
3417 
3418   if (_synthetic_flag)
3419     k->set_is_synthetic();
3420   if (_sourcefile_index != 0) {
3421     k->set_source_file_name_index(_sourcefile_index);
3422   }
3423   if (_generic_signature_index != 0) {
3424     k->set_generic_signature_index(_generic_signature_index);
3425   }
3426   if (_sde_buffer != NULL) {
3427     k->set_source_debug_extension(_sde_buffer, _sde_length);
3428   }
3429 }
3430 
3431 // Create the Annotations object that will
3432 // hold the annotations array for the Klass.
3433 void ClassFileParser::create_combined_annotations(TRAPS) {
3434     if (_annotations == NULL &&
3435         _type_annotations == NULL &&
3436         _fields_annotations == NULL &&
3437         _fields_type_annotations == NULL) {
3438       // Don't create the Annotations object unnecessarily.
3439       return;
3440     }
3441 
3442     Annotations* const annotations = Annotations::allocate(_loader_data, CHECK);
3443     annotations->set_class_annotations(_annotations);
3444     annotations->set_class_type_annotations(_type_annotations);
3445     annotations->set_fields_annotations(_fields_annotations);
3446     annotations->set_fields_type_annotations(_fields_type_annotations);
3447 
3448     // This is the Annotations object that will be
3449     // assigned to InstanceKlass being constructed.
3450     _combined_annotations = annotations;
3451 
3452     // The annotations arrays below has been transfered the
3453     // _combined_annotations so these fields can now be cleared.
3454     _annotations             = NULL;
3455     _type_annotations        = NULL;
3456     _fields_annotations      = NULL;
3457     _fields_type_annotations = NULL;
3458 }
3459 
3460 // Transfer ownership of metadata allocated to the InstanceKlass.
3461 void ClassFileParser::apply_parsed_class_metadata(
3462                                             InstanceKlass* this_klass,
3463                                             int java_fields_count, TRAPS) {
3464   assert(this_klass != NULL, "invariant");
3465 
3466   _cp->set_pool_holder(this_klass);
3467   this_klass->set_constants(_cp);
3468   this_klass->set_fields(_fields, java_fields_count);
3469   this_klass->set_methods(_methods);
3470   this_klass->set_inner_classes(_inner_classes);
3471   this_klass->set_local_interfaces(_local_interfaces);
3472   this_klass->set_transitive_interfaces(_transitive_interfaces);
3473   this_klass->set_annotations(_combined_annotations);
3474 
3475   // Clear out these fields so they don't get deallocated by the destructor
3476   clear_class_metadata();
3477 }
3478 
3479 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
3480                                                        int runtime_visible_annotations_length,
3481                                                        const u1* const runtime_invisible_annotations,
3482                                                        int runtime_invisible_annotations_length,
3483                                                        TRAPS) {
3484   AnnotationArray* annotations = NULL;
3485   if (runtime_visible_annotations != NULL ||
3486       runtime_invisible_annotations != NULL) {
3487     annotations = MetadataFactory::new_array<u1>(_loader_data,
3488                                           runtime_visible_annotations_length +
3489                                           runtime_invisible_annotations_length,
3490                                           CHECK_(annotations));
3491     if (runtime_visible_annotations != NULL) {
3492       for (int i = 0; i < runtime_visible_annotations_length; i++) {
3493         annotations->at_put(i, runtime_visible_annotations[i]);
3494       }
3495     }
3496     if (runtime_invisible_annotations != NULL) {
3497       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
3498         int append = runtime_visible_annotations_length+i;
3499         annotations->at_put(append, runtime_invisible_annotations[i]);
3500       }
3501     }
3502   }
3503   return annotations;
3504 }
3505 
3506 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
3507                                                         const int super_class_index,
3508                                                         const bool need_verify,
3509                                                         TRAPS) {
3510   assert(cp != NULL, "invariant");
3511   const InstanceKlass* super_klass = NULL;
3512 
3513   if (super_class_index == 0) {
3514     check_property(_class_name == vmSymbols::java_lang_Object(),
3515                    "Invalid superclass index %u in class file %s",
3516                    super_class_index,
3517                    CHECK_NULL);
3518   } else {
3519     check_property(valid_klass_reference_at(super_class_index),
3520                    "Invalid superclass index %u in class file %s",
3521                    super_class_index,
3522                    CHECK_NULL);
3523     // The class name should be legal because it is checked when parsing constant pool.
3524     // However, make sure it is not an array type.
3525     bool is_array = false;
3526     if (cp->tag_at(super_class_index).is_klass()) {
3527       super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
3528       if (need_verify)
3529         is_array = super_klass->is_array_klass();
3530     } else if (need_verify) {
3531       is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
3532     }
3533     if (need_verify) {
3534       guarantee_property(!is_array,
3535                         "Bad superclass name in class file %s", CHECK_NULL);
3536     }
3537   }
3538   return super_klass;
3539 }
3540 
3541 static unsigned int compute_oop_map_count(const InstanceKlass* super,
3542                                           unsigned int nonstatic_oop_map_count,
3543                                           int first_nonstatic_oop_offset) {
3544 
3545   unsigned int map_count =
3546     NULL == super ? 0 : super->nonstatic_oop_map_count();
3547   if (nonstatic_oop_map_count > 0) {
3548     // We have oops to add to map
3549     if (map_count == 0) {
3550       map_count = nonstatic_oop_map_count;
3551     }
3552     else {
3553       // Check whether we should add a new map block or whether the last one can
3554       // be extended
3555       const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
3556       const OopMapBlock* const last_map = first_map + map_count - 1;
3557 
3558       const int next_offset = last_map->offset() + last_map->count() * heapOopSize;
3559       if (next_offset == first_nonstatic_oop_offset) {
3560         // There is no gap bettwen superklass's last oop field and first
3561         // local oop field, merge maps.
3562         nonstatic_oop_map_count -= 1;
3563       }
3564       else {
3565         // Superklass didn't end with a oop field, add extra maps
3566         assert(next_offset < first_nonstatic_oop_offset, "just checking");
3567       }
3568       map_count += nonstatic_oop_map_count;
3569     }
3570   }
3571   return map_count;
3572 }
3573 
3574 #ifndef PRODUCT
3575 static void print_field_layout(const Symbol* name,
3576                                Array<u2>* fields,
3577                                constantPoolHandle cp,
3578                                int instance_size,
3579                                int instance_fields_start,
3580                                int instance_fields_end,
3581                                int static_fields_end) {
3582 
3583   assert(name != NULL, "invariant");
3584 
3585   tty->print("%s: field layout\n", name->as_klass_external_name());
3586   tty->print("  @%3d %s\n", instance_fields_start, "--- instance fields start ---");
3587   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3588     if (!fs.access_flags().is_static()) {
3589       tty->print("  @%3d \"%s\" %s\n",
3590         fs.offset(),
3591         fs.name()->as_klass_external_name(),
3592         fs.signature()->as_klass_external_name());
3593     }
3594   }
3595   tty->print("  @%3d %s\n", instance_fields_end, "--- instance fields end ---");
3596   tty->print("  @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
3597   tty->print("  @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
3598   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
3599     if (fs.access_flags().is_static()) {
3600       tty->print("  @%3d \"%s\" %s\n",
3601         fs.offset(),
3602         fs.name()->as_klass_external_name(),
3603         fs.signature()->as_klass_external_name());
3604     }
3605   }
3606   tty->print("  @%3d %s\n", static_fields_end, "--- static fields end ---");
3607   tty->print("\n");
3608 }
3609 #endif
3610 
3611 // Values needed for oopmap and InstanceKlass creation
3612 class ClassFileParser::FieldLayoutInfo : public ResourceObj {
3613  public:
3614   int*          nonstatic_oop_offsets;
3615   unsigned int* nonstatic_oop_counts;
3616   unsigned int  nonstatic_oop_map_count;
3617   unsigned int  total_oop_map_count;
3618   int           instance_size;
3619   int           nonstatic_field_size;
3620   int           static_field_size;
3621   bool          has_nonstatic_fields;
3622 };
3623 
3624 // Layout fields and fill in FieldLayoutInfo.  Could use more refactoring!
3625 void ClassFileParser::layout_fields(ConstantPool* cp,
3626                                     const FieldAllocationCount* fac,
3627                                     const ClassAnnotationCollector* parsed_annotations,
3628                                     FieldLayoutInfo* info,
3629                                     TRAPS) {
3630 
3631   assert(cp != NULL, "invariant");
3632 
3633   // Field size and offset computation
3634   int nonstatic_field_size = _super_klass == NULL ? 0 :
3635                                _super_klass->nonstatic_field_size();
3636 
3637   // Count the contended fields by type.
3638   //
3639   // We ignore static fields, because @Contended is not supported for them.
3640   // The layout code below will also ignore the static fields.
3641   int nonstatic_contended_count = 0;
3642   FieldAllocationCount fac_contended;
3643   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3644     FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
3645     if (fs.is_contended()) {
3646       fac_contended.count[atype]++;
3647       if (!fs.access_flags().is_static()) {
3648         nonstatic_contended_count++;
3649       }
3650     }
3651   }
3652 
3653 
3654   // Calculate the starting byte offsets
3655   int next_static_oop_offset    = InstanceMirrorKlass::offset_of_static_fields();
3656   int next_static_double_offset = next_static_oop_offset +
3657                                       ((fac->count[STATIC_OOP]) * heapOopSize);
3658   if ( fac->count[STATIC_DOUBLE] &&
3659        (Universe::field_type_should_be_aligned(T_DOUBLE) ||
3660         Universe::field_type_should_be_aligned(T_LONG)) ) {
3661     next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
3662   }
3663 
3664   int next_static_word_offset   = next_static_double_offset +
3665                                     ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
3666   int next_static_short_offset  = next_static_word_offset +
3667                                     ((fac->count[STATIC_WORD]) * BytesPerInt);
3668   int next_static_byte_offset   = next_static_short_offset +
3669                                   ((fac->count[STATIC_SHORT]) * BytesPerShort);
3670 
3671   int nonstatic_fields_start  = instanceOopDesc::base_offset_in_bytes() +
3672                                 nonstatic_field_size * heapOopSize;
3673 
3674   int next_nonstatic_field_offset = nonstatic_fields_start;
3675 
3676   const bool is_contended_class     = parsed_annotations->is_contended();
3677 
3678   // Class is contended, pad before all the fields
3679   if (is_contended_class) {
3680     next_nonstatic_field_offset += ContendedPaddingWidth;
3681   }
3682 
3683   // Compute the non-contended fields count.
3684   // The packing code below relies on these counts to determine if some field
3685   // can be squeezed into the alignment gap. Contended fields are obviously
3686   // exempt from that.
3687   unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
3688   unsigned int nonstatic_word_count   = fac->count[NONSTATIC_WORD]   - fac_contended.count[NONSTATIC_WORD];
3689   unsigned int nonstatic_short_count  = fac->count[NONSTATIC_SHORT]  - fac_contended.count[NONSTATIC_SHORT];
3690   unsigned int nonstatic_byte_count   = fac->count[NONSTATIC_BYTE]   - fac_contended.count[NONSTATIC_BYTE];
3691   unsigned int nonstatic_oop_count    = fac->count[NONSTATIC_OOP]    - fac_contended.count[NONSTATIC_OOP];
3692 
3693   // Total non-static fields count, including every contended field
3694   unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
3695                                         fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
3696                                         fac->count[NONSTATIC_OOP];
3697 
3698   const bool super_has_nonstatic_fields =
3699           (_super_klass != NULL && _super_klass->has_nonstatic_fields());
3700   const bool has_nonstatic_fields =
3701     super_has_nonstatic_fields || (nonstatic_fields_count != 0);
3702 
3703 
3704   // Prepare list of oops for oop map generation.
3705   //
3706   // "offset" and "count" lists are describing the set of contiguous oop
3707   // regions. offset[i] is the start of the i-th region, which then has
3708   // count[i] oops following. Before we know how many regions are required,
3709   // we pessimistically allocate the maps to fit all the oops into the
3710   // distinct regions.
3711   //
3712   // TODO: We add +1 to always allocate non-zero resource arrays; we need
3713   // to figure out if we still need to do this.
3714   unsigned int nonstatic_oop_map_count = 0;
3715   unsigned int max_nonstatic_oop_maps  = fac->count[NONSTATIC_OOP] + 1;
3716 
3717   int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
3718             THREAD, int, max_nonstatic_oop_maps);
3719   unsigned int* const nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
3720             THREAD, unsigned int, max_nonstatic_oop_maps);
3721 
3722   int first_nonstatic_oop_offset = 0; // will be set for first oop field
3723 
3724   bool compact_fields   = CompactFields;
3725   int allocation_style = FieldsAllocationStyle;
3726   if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
3727     assert(false, "0 <= FieldsAllocationStyle <= 2");
3728     allocation_style = 1; // Optimistic
3729   }
3730 
3731   // The next classes have predefined hard-coded fields offsets
3732   // (see in JavaClasses::compute_hard_coded_offsets()).
3733   // Use default fields allocation order for them.
3734   if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL &&
3735       (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
3736        _class_name == vmSymbols::java_lang_Class() ||
3737        _class_name == vmSymbols::java_lang_ClassLoader() ||
3738        _class_name == vmSymbols::java_lang_ref_Reference() ||
3739        _class_name == vmSymbols::java_lang_ref_SoftReference() ||
3740        _class_name == vmSymbols::java_lang_StackTraceElement() ||
3741        _class_name == vmSymbols::java_lang_String() ||
3742        _class_name == vmSymbols::java_lang_Throwable() ||
3743        _class_name == vmSymbols::java_lang_Boolean() ||
3744        _class_name == vmSymbols::java_lang_Character() ||
3745        _class_name == vmSymbols::java_lang_Float() ||
3746        _class_name == vmSymbols::java_lang_Double() ||
3747        _class_name == vmSymbols::java_lang_Byte() ||
3748        _class_name == vmSymbols::java_lang_Short() ||
3749        _class_name == vmSymbols::java_lang_Integer() ||
3750        _class_name == vmSymbols::java_lang_Long())) {
3751     allocation_style = 0;     // Allocate oops first
3752     compact_fields   = false; // Don't compact fields
3753   }
3754 
3755   int next_nonstatic_oop_offset = 0;
3756   int next_nonstatic_double_offset = 0;
3757 
3758   // Rearrange fields for a given allocation style
3759   if( allocation_style == 0 ) {
3760     // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
3761     next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3762     next_nonstatic_double_offset = next_nonstatic_oop_offset +
3763                                     (nonstatic_oop_count * heapOopSize);
3764   } else if( allocation_style == 1 ) {
3765     // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
3766     next_nonstatic_double_offset = next_nonstatic_field_offset;
3767   } else if( allocation_style == 2 ) {
3768     // Fields allocation: oops fields in super and sub classes are together.
3769     if( nonstatic_field_size > 0 && _super_klass != NULL &&
3770         _super_klass->nonstatic_oop_map_size() > 0 ) {
3771       const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
3772       const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
3773       const OopMapBlock* const last_map = first_map + map_count - 1;
3774       const int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
3775       if (next_offset == next_nonstatic_field_offset) {
3776         allocation_style = 0;   // allocate oops first
3777         next_nonstatic_oop_offset    = next_nonstatic_field_offset;
3778         next_nonstatic_double_offset = next_nonstatic_oop_offset +
3779                                        (nonstatic_oop_count * heapOopSize);
3780       }
3781     }
3782     if( allocation_style == 2 ) {
3783       allocation_style = 1;     // allocate oops last
3784       next_nonstatic_double_offset = next_nonstatic_field_offset;
3785     }
3786   } else {
3787     ShouldNotReachHere();
3788   }
3789 
3790   int nonstatic_oop_space_count   = 0;
3791   int nonstatic_word_space_count  = 0;
3792   int nonstatic_short_space_count = 0;
3793   int nonstatic_byte_space_count  = 0;
3794   int nonstatic_oop_space_offset = 0;
3795   int nonstatic_word_space_offset = 0;
3796   int nonstatic_short_space_offset = 0;
3797   int nonstatic_byte_space_offset = 0;
3798 
3799   // Try to squeeze some of the fields into the gaps due to
3800   // long/double alignment.
3801   if (nonstatic_double_count > 0) {
3802     int offset = next_nonstatic_double_offset;
3803     next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
3804     if (compact_fields && offset != next_nonstatic_double_offset) {
3805       // Allocate available fields into the gap before double field.
3806       int length = next_nonstatic_double_offset - offset;
3807       assert(length == BytesPerInt, "");
3808       nonstatic_word_space_offset = offset;
3809       if (nonstatic_word_count > 0) {
3810         nonstatic_word_count      -= 1;
3811         nonstatic_word_space_count = 1; // Only one will fit
3812         length -= BytesPerInt;
3813         offset += BytesPerInt;
3814       }
3815       nonstatic_short_space_offset = offset;
3816       while (length >= BytesPerShort && nonstatic_short_count > 0) {
3817         nonstatic_short_count       -= 1;
3818         nonstatic_short_space_count += 1;
3819         length -= BytesPerShort;
3820         offset += BytesPerShort;
3821       }
3822       nonstatic_byte_space_offset = offset;
3823       while (length > 0 && nonstatic_byte_count > 0) {
3824         nonstatic_byte_count       -= 1;
3825         nonstatic_byte_space_count += 1;
3826         length -= 1;
3827       }
3828       // Allocate oop field in the gap if there are no other fields for that.
3829       nonstatic_oop_space_offset = offset;
3830       if (length >= heapOopSize && nonstatic_oop_count > 0 &&
3831           allocation_style != 0) { // when oop fields not first
3832         nonstatic_oop_count      -= 1;
3833         nonstatic_oop_space_count = 1; // Only one will fit
3834         length -= heapOopSize;
3835         offset += heapOopSize;
3836       }
3837     }
3838   }
3839 
3840   int next_nonstatic_word_offset = next_nonstatic_double_offset +
3841                                      (nonstatic_double_count * BytesPerLong);
3842   int next_nonstatic_short_offset = next_nonstatic_word_offset +
3843                                       (nonstatic_word_count * BytesPerInt);
3844   int next_nonstatic_byte_offset = next_nonstatic_short_offset +
3845                                      (nonstatic_short_count * BytesPerShort);
3846   int next_nonstatic_padded_offset = next_nonstatic_byte_offset +
3847                                        nonstatic_byte_count;
3848 
3849   // let oops jump before padding with this allocation style
3850   if( allocation_style == 1 ) {
3851     next_nonstatic_oop_offset = next_nonstatic_padded_offset;
3852     if( nonstatic_oop_count > 0 ) {
3853       next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
3854     }
3855     next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
3856   }
3857 
3858   // Iterate over fields again and compute correct offsets.
3859   // The field allocation type was temporarily stored in the offset slot.
3860   // oop fields are located before non-oop fields (static and non-static).
3861   for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3862 
3863     // skip already laid out fields
3864     if (fs.is_offset_set()) continue;
3865 
3866     // contended instance fields are handled below
3867     if (fs.is_contended() && !fs.access_flags().is_static()) continue;
3868 
3869     int real_offset = 0;
3870     const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type();
3871 
3872     // pack the rest of the fields
3873     switch (atype) {
3874       case STATIC_OOP:
3875         real_offset = next_static_oop_offset;
3876         next_static_oop_offset += heapOopSize;
3877         break;
3878       case STATIC_BYTE:
3879         real_offset = next_static_byte_offset;
3880         next_static_byte_offset += 1;
3881         break;
3882       case STATIC_SHORT:
3883         real_offset = next_static_short_offset;
3884         next_static_short_offset += BytesPerShort;
3885         break;
3886       case STATIC_WORD:
3887         real_offset = next_static_word_offset;
3888         next_static_word_offset += BytesPerInt;
3889         break;
3890       case STATIC_DOUBLE:
3891         real_offset = next_static_double_offset;
3892         next_static_double_offset += BytesPerLong;
3893         break;
3894       case NONSTATIC_OOP:
3895         if( nonstatic_oop_space_count > 0 ) {
3896           real_offset = nonstatic_oop_space_offset;
3897           nonstatic_oop_space_offset += heapOopSize;
3898           nonstatic_oop_space_count  -= 1;
3899         } else {
3900           real_offset = next_nonstatic_oop_offset;
3901           next_nonstatic_oop_offset += heapOopSize;
3902         }
3903 
3904         // Record this oop in the oop maps
3905         if( nonstatic_oop_map_count > 0 &&
3906             nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
3907             real_offset -
3908             int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
3909             heapOopSize ) {
3910           // This oop is adjacent to the previous one, add to current oop map
3911           assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
3912           nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
3913         } else {
3914           // This oop is not adjacent to the previous one, create new oop map
3915           assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
3916           nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
3917           nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
3918           nonstatic_oop_map_count += 1;
3919           if( first_nonstatic_oop_offset == 0 ) { // Undefined
3920             first_nonstatic_oop_offset = real_offset;
3921           }
3922         }
3923         break;
3924       case NONSTATIC_BYTE:
3925         if( nonstatic_byte_space_count > 0 ) {
3926           real_offset = nonstatic_byte_space_offset;
3927           nonstatic_byte_space_offset += 1;
3928           nonstatic_byte_space_count  -= 1;
3929         } else {
3930           real_offset = next_nonstatic_byte_offset;
3931           next_nonstatic_byte_offset += 1;
3932         }
3933         break;
3934       case NONSTATIC_SHORT:
3935         if( nonstatic_short_space_count > 0 ) {
3936           real_offset = nonstatic_short_space_offset;
3937           nonstatic_short_space_offset += BytesPerShort;
3938           nonstatic_short_space_count  -= 1;
3939         } else {
3940           real_offset = next_nonstatic_short_offset;
3941           next_nonstatic_short_offset += BytesPerShort;
3942         }
3943         break;
3944       case NONSTATIC_WORD:
3945         if( nonstatic_word_space_count > 0 ) {
3946           real_offset = nonstatic_word_space_offset;
3947           nonstatic_word_space_offset += BytesPerInt;
3948           nonstatic_word_space_count  -= 1;
3949         } else {
3950           real_offset = next_nonstatic_word_offset;
3951           next_nonstatic_word_offset += BytesPerInt;
3952         }
3953         break;
3954       case NONSTATIC_DOUBLE:
3955         real_offset = next_nonstatic_double_offset;
3956         next_nonstatic_double_offset += BytesPerLong;
3957         break;
3958       default:
3959         ShouldNotReachHere();
3960     }
3961     fs.set_offset(real_offset);
3962   }
3963 
3964 
3965   // Handle the contended cases.
3966   //
3967   // Each contended field should not intersect the cache line with another contended field.
3968   // In the absence of alignment information, we end up with pessimistically separating
3969   // the fields with full-width padding.
3970   //
3971   // Additionally, this should not break alignment for the fields, so we round the alignment up
3972   // for each field.
3973   if (nonstatic_contended_count > 0) {
3974 
3975     // if there is at least one contended field, we need to have pre-padding for them
3976     next_nonstatic_padded_offset += ContendedPaddingWidth;
3977 
3978     // collect all contended groups
3979     ResourceBitMap bm(cp->size());
3980     for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3981       // skip already laid out fields
3982       if (fs.is_offset_set()) continue;
3983 
3984       if (fs.is_contended()) {
3985         bm.set_bit(fs.contended_group());
3986       }
3987     }
3988 
3989     int current_group = -1;
3990     while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
3991 
3992       for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
3993 
3994         // skip already laid out fields
3995         if (fs.is_offset_set()) continue;
3996 
3997         // skip non-contended fields and fields from different group
3998         if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
3999 
4000         // handle statics below
4001         if (fs.access_flags().is_static()) continue;
4002 
4003         int real_offset = 0;
4004         FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
4005 
4006         switch (atype) {
4007           case NONSTATIC_BYTE:
4008             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
4009             real_offset = next_nonstatic_padded_offset;
4010             next_nonstatic_padded_offset += 1;
4011             break;
4012 
4013           case NONSTATIC_SHORT:
4014             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
4015             real_offset = next_nonstatic_padded_offset;
4016             next_nonstatic_padded_offset += BytesPerShort;
4017             break;
4018 
4019           case NONSTATIC_WORD:
4020             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
4021             real_offset = next_nonstatic_padded_offset;
4022             next_nonstatic_padded_offset += BytesPerInt;
4023             break;
4024 
4025           case NONSTATIC_DOUBLE:
4026             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
4027             real_offset = next_nonstatic_padded_offset;
4028             next_nonstatic_padded_offset += BytesPerLong;
4029             break;
4030 
4031           case NONSTATIC_OOP:
4032             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
4033             real_offset = next_nonstatic_padded_offset;
4034             next_nonstatic_padded_offset += heapOopSize;
4035 
4036             // Record this oop in the oop maps
4037             if( nonstatic_oop_map_count > 0 &&
4038                 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
4039                 real_offset -
4040                 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
4041                 heapOopSize ) {
4042               // This oop is adjacent to the previous one, add to current oop map
4043               assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
4044               nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
4045             } else {
4046               // This oop is not adjacent to the previous one, create new oop map
4047               assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
4048               nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
4049               nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
4050               nonstatic_oop_map_count += 1;
4051               if( first_nonstatic_oop_offset == 0 ) { // Undefined
4052                 first_nonstatic_oop_offset = real_offset;
4053               }
4054             }
4055             break;
4056 
4057           default:
4058             ShouldNotReachHere();
4059         }
4060 
4061         if (fs.contended_group() == 0) {
4062           // Contended group defines the equivalence class over the fields:
4063           // the fields within the same contended group are not inter-padded.
4064           // The only exception is default group, which does not incur the
4065           // equivalence, and so requires intra-padding.
4066           next_nonstatic_padded_offset += ContendedPaddingWidth;
4067         }
4068 
4069         fs.set_offset(real_offset);
4070       } // for
4071 
4072       // Start laying out the next group.
4073       // Note that this will effectively pad the last group in the back;
4074       // this is expected to alleviate memory contention effects for
4075       // subclass fields and/or adjacent object.
4076       // If this was the default group, the padding is already in place.
4077       if (current_group != 0) {
4078         next_nonstatic_padded_offset += ContendedPaddingWidth;
4079       }
4080     }
4081 
4082     // handle static fields
4083   }
4084 
4085   // Entire class is contended, pad in the back.
4086   // This helps to alleviate memory contention effects for subclass fields
4087   // and/or adjacent object.
4088   if (is_contended_class) {
4089     next_nonstatic_padded_offset += ContendedPaddingWidth;
4090   }
4091 
4092   int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
4093 
4094   int nonstatic_fields_end      = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
4095   int instance_end              = align_size_up(notaligned_nonstatic_fields_end, wordSize);
4096   int static_fields_end         = align_size_up(next_static_byte_offset, wordSize);
4097 
4098   int static_field_size         = (static_fields_end -
4099                                    InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
4100   nonstatic_field_size          = nonstatic_field_size +
4101                                   (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
4102 
4103   int instance_size             = align_object_size(instance_end / wordSize);
4104 
4105   assert(instance_size == align_object_size(align_size_up(
4106          (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
4107           wordSize) / wordSize), "consistent layout helper value");
4108 
4109   // Invariant: nonstatic_field end/start should only change if there are
4110   // nonstatic fields in the class, or if the class is contended. We compare
4111   // against the non-aligned value, so that end alignment will not fail the
4112   // assert without actually having the fields.
4113   assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
4114          is_contended_class ||
4115          (nonstatic_fields_count > 0), "double-check nonstatic start/end");
4116 
4117   // Number of non-static oop map blocks allocated at end of klass.
4118   const unsigned int total_oop_map_count =
4119     compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
4120                           first_nonstatic_oop_offset);
4121 
4122 #ifndef PRODUCT
4123   if (PrintFieldLayout) {
4124     print_field_layout(_class_name,
4125           _fields,
4126           cp,
4127           instance_size,
4128           nonstatic_fields_start,
4129           nonstatic_fields_end,
4130           static_fields_end);
4131   }
4132 
4133 #endif
4134   // Pass back information needed for InstanceKlass creation
4135   info->nonstatic_oop_offsets = nonstatic_oop_offsets;
4136   info->nonstatic_oop_counts = nonstatic_oop_counts;
4137   info->nonstatic_oop_map_count = nonstatic_oop_map_count;
4138   info->total_oop_map_count = total_oop_map_count;
4139   info->instance_size = instance_size;
4140   info->static_field_size = static_field_size;
4141   info->nonstatic_field_size = nonstatic_field_size;
4142   info->has_nonstatic_fields = has_nonstatic_fields;
4143 }
4144 
4145 static void fill_oop_maps(const InstanceKlass* k,
4146                           unsigned int nonstatic_oop_map_count,
4147                           const int* nonstatic_oop_offsets,
4148                           const unsigned int* nonstatic_oop_counts) {
4149 
4150   assert(k != NULL, "invariant");
4151 
4152   OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
4153   const InstanceKlass* const super = k->superklass();
4154   const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
4155   if (super_count > 0) {
4156     // Copy maps from superklass
4157     OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
4158     for (unsigned int i = 0; i < super_count; ++i) {
4159       *this_oop_map++ = *super_oop_map++;
4160     }
4161   }
4162 
4163   if (nonstatic_oop_map_count > 0) {
4164     if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
4165       // The counts differ because there is no gap between superklass's last oop
4166       // field and the first local oop field.  Extend the last oop map copied
4167       // from the superklass instead of creating new one.
4168       nonstatic_oop_map_count--;
4169       nonstatic_oop_offsets++;
4170       this_oop_map--;
4171       this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
4172       this_oop_map++;
4173     }
4174 
4175     // Add new map blocks, fill them
4176     while (nonstatic_oop_map_count-- > 0) {
4177       this_oop_map->set_offset(*nonstatic_oop_offsets++);
4178       this_oop_map->set_count(*nonstatic_oop_counts++);
4179       this_oop_map++;
4180     }
4181     assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
4182            this_oop_map, "sanity");
4183   }
4184 }
4185 
4186 
4187 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
4188   assert(ik != NULL, "invariant");
4189 
4190   const Klass* const super = ik->super();
4191 
4192   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
4193   // in which case we don't have to register objects as finalizable
4194   if (!_has_empty_finalizer) {
4195     if (_has_finalizer ||
4196         (super != NULL && super->has_finalizer())) {
4197       ik->set_has_finalizer();
4198     }
4199   }
4200 
4201 #ifdef ASSERT
4202   bool f = false;
4203   const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(),
4204                                            vmSymbols::void_method_signature());
4205   if (m != NULL && !m->is_empty_method()) {
4206       f = true;
4207   }
4208 
4209   // Spec doesn't prevent agent from redefinition of empty finalizer.
4210   // Despite the fact that it's generally bad idea and redefined finalizer
4211   // will not work as expected we shouldn't abort vm in this case
4212   if (!ik->has_redefined_this_or_super()) {
4213     assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
4214   }
4215 #endif
4216 
4217   // Check if this klass supports the java.lang.Cloneable interface
4218   if (SystemDictionary::Cloneable_klass_loaded()) {
4219     if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
4220       ik->set_is_cloneable();
4221     }
4222   }
4223 
4224   // Check if this klass has a vanilla default constructor
4225   if (super == NULL) {
4226     // java.lang.Object has empty default constructor
4227     ik->set_has_vanilla_constructor();
4228   } else {
4229     if (super->has_vanilla_constructor() &&
4230         _has_vanilla_constructor) {
4231       ik->set_has_vanilla_constructor();
4232     }
4233 #ifdef ASSERT
4234     bool v = false;
4235     if (super->has_vanilla_constructor()) {
4236       const Method* const constructor =
4237         ik->find_method(vmSymbols::object_initializer_name(),
4238                        vmSymbols::void_method_signature());
4239       if (constructor != NULL && constructor->is_vanilla_constructor()) {
4240         v = true;
4241       }
4242     }
4243     assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
4244 #endif
4245   }
4246 
4247   // If it cannot be fast-path allocated, set a bit in the layout helper.
4248   // See documentation of InstanceKlass::can_be_fastpath_allocated().
4249   assert(ik->size_helper() > 0, "layout_helper is initialized");
4250   if ((!RegisterFinalizersAtInit && ik->has_finalizer())
4251       || ik->is_abstract() || ik->is_interface()
4252       || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
4253       || ik->size_helper() >= FastAllocateSizeLimit) {
4254     // Forbid fast-path allocation.
4255     const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
4256     ik->set_layout_helper(lh);
4257   }
4258 }
4259 
4260 // Attach super classes and interface classes to class loader data
4261 static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
4262                                               TRAPS) {
4263   assert(defined_klass != NULL, "invariant");
4264 
4265   ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data();
4266   if (defining_loader_data->is_the_null_class_loader_data()) {
4267       // Dependencies to null class loader data are implicit.
4268       return;
4269   } else {
4270     // add super class dependency
4271     Klass* const super = defined_klass->super();
4272     if (super != NULL) {
4273       defining_loader_data->record_dependency(super, CHECK);
4274     }
4275 
4276     // add super interface dependencies
4277     const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
4278     if (local_interfaces != NULL) {
4279       const int length = local_interfaces->length();
4280       for (int i = 0; i < length; i++) {
4281         defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
4282       }
4283     }
4284   }
4285 }
4286 
4287 // utility methods for appending an array with check for duplicates
4288 
4289 static void append_interfaces(GrowableArray<Klass*>* result,
4290                               const Array<Klass*>* const ifs) {
4291   // iterate over new interfaces
4292   for (int i = 0; i < ifs->length(); i++) {
4293     Klass* const e = ifs->at(i);
4294     assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
4295     // add new interface
4296     result->append_if_missing(e);
4297   }
4298 }
4299 
4300 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
4301                                                     Array<Klass*>* local_ifs,
4302                                                     ClassLoaderData* loader_data,
4303                                                     TRAPS) {
4304   assert(local_ifs != NULL, "invariant");
4305   assert(loader_data != NULL, "invariant");
4306 
4307   // Compute maximum size for transitive interfaces
4308   int max_transitive_size = 0;
4309   int super_size = 0;
4310   // Add superclass transitive interfaces size
4311   if (super != NULL) {
4312     super_size = super->transitive_interfaces()->length();
4313     max_transitive_size += super_size;
4314   }
4315   // Add local interfaces' super interfaces
4316   const int local_size = local_ifs->length();
4317   for (int i = 0; i < local_size; i++) {
4318     Klass* const l = local_ifs->at(i);
4319     max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
4320   }
4321   // Finally add local interfaces
4322   max_transitive_size += local_size;
4323   // Construct array
4324   if (max_transitive_size == 0) {
4325     // no interfaces, use canonicalized array
4326     return Universe::the_empty_klass_array();
4327   } else if (max_transitive_size == super_size) {
4328     // no new local interfaces added, share superklass' transitive interface array
4329     return super->transitive_interfaces();
4330   } else if (max_transitive_size == local_size) {
4331     // only local interfaces added, share local interface array
4332     return local_ifs;
4333   } else {
4334     ResourceMark rm;
4335     GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size);
4336 
4337     // Copy down from superclass
4338     if (super != NULL) {
4339       append_interfaces(result, super->transitive_interfaces());
4340     }
4341 
4342     // Copy down from local interfaces' superinterfaces
4343     for (int i = 0; i < local_size; i++) {
4344       Klass* const l = local_ifs->at(i);
4345       append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
4346     }
4347     // Finally add local interfaces
4348     append_interfaces(result, local_ifs);
4349 
4350     // length will be less than the max_transitive_size if duplicates were removed
4351     const int length = result->length();
4352     assert(length <= max_transitive_size, "just checking");
4353     Array<Klass*>* const new_result =
4354       MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
4355     for (int i = 0; i < length; i++) {
4356       Klass* const e = result->at(i);
4357       assert(e != NULL, "just checking");
4358       new_result->at_put(i, e);
4359     }
4360     return new_result;
4361   }
4362 }
4363 
4364 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
4365   assert(this_klass != NULL, "invariant");
4366   const Klass* const super = this_klass->super();
4367   if (super != NULL) {
4368 
4369     // If the loader is not the boot loader then throw an exception if its
4370     // superclass is in package jdk.internal.reflect and its loader is not a
4371     // special reflection class loader
4372     if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
4373       assert(super->is_instance_klass(), "super is not instance klass");
4374       PackageEntry* super_package = super->package();
4375       if (super_package != NULL &&
4376           super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
4377           !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
4378         ResourceMark rm(THREAD);
4379         Exceptions::fthrow(
4380           THREAD_AND_LOCATION,
4381           vmSymbols::java_lang_IllegalAccessError(),
4382           "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
4383           this_klass->external_name(),
4384           this_klass->class_loader_data()->loader_name(),
4385           super->external_name());
4386         return;
4387       }
4388     }
4389 
4390     Reflection::VerifyClassAccessResults vca_result =
4391       Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
4392     if (vca_result != Reflection::ACCESS_OK) {
4393       ResourceMark rm(THREAD);
4394       char* msg = Reflection::verify_class_access_msg(this_klass,
4395                                                       InstanceKlass::cast(super),
4396                                                       vca_result);
4397       if (msg == NULL) {
4398         Exceptions::fthrow(
4399           THREAD_AND_LOCATION,
4400           vmSymbols::java_lang_IllegalAccessError(),
4401           "class %s cannot access its superclass %s",
4402           this_klass->external_name(),
4403           super->external_name());
4404       } else {
4405         // Add additional message content.
4406         Exceptions::fthrow(
4407           THREAD_AND_LOCATION,
4408           vmSymbols::java_lang_IllegalAccessError(),
4409           "superclass access check failed: %s",
4410           msg);
4411       }
4412     }
4413   }
4414 }
4415 
4416 
4417 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
4418   assert(this_klass != NULL, "invariant");
4419   const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
4420   const int lng = local_interfaces->length();
4421   for (int i = lng - 1; i >= 0; i--) {
4422     Klass* const k = local_interfaces->at(i);
4423     assert (k != NULL && k->is_interface(), "invalid interface");
4424     Reflection::VerifyClassAccessResults vca_result =
4425       Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
4426     if (vca_result != Reflection::ACCESS_OK) {
4427       ResourceMark rm(THREAD);
4428       char* msg = Reflection::verify_class_access_msg(this_klass,
4429                                                       InstanceKlass::cast(k),
4430                                                       vca_result);
4431       if (msg == NULL) {
4432         Exceptions::fthrow(
4433           THREAD_AND_LOCATION,
4434           vmSymbols::java_lang_IllegalAccessError(),
4435           "class %s cannot access its superinterface %s",
4436           this_klass->external_name(),
4437           k->external_name());
4438       } else {
4439         // Add additional message content.
4440         Exceptions::fthrow(
4441           THREAD_AND_LOCATION,
4442           vmSymbols::java_lang_IllegalAccessError(),
4443           "superinterface check failed: %s",
4444           msg);
4445       }
4446     }
4447   }
4448 }
4449 
4450 
4451 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
4452   assert(this_klass != NULL, "invariant");
4453   const Array<Method*>* const methods = this_klass->methods();
4454   const int num_methods = methods->length();
4455 
4456   // go thru each method and check if it overrides a final method
4457   for (int index = 0; index < num_methods; index++) {
4458     const Method* const m = methods->at(index);
4459 
4460     // skip private, static, and <init> methods
4461     if ((!m->is_private() && !m->is_static()) &&
4462         (m->name() != vmSymbols::object_initializer_name())) {
4463 
4464       const Symbol* const name = m->name();
4465       const Symbol* const signature = m->signature();
4466       const Klass* k = this_klass->super();
4467       const Method* super_m = NULL;
4468       while (k != NULL) {
4469         // skip supers that don't have final methods.
4470         if (k->has_final_method()) {
4471           // lookup a matching method in the super class hierarchy
4472           super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
4473           if (super_m == NULL) {
4474             break; // didn't find any match; get out
4475           }
4476 
4477           if (super_m->is_final() && !super_m->is_static() &&
4478               // matching method in super is final, and not static
4479               (Reflection::verify_field_access(this_klass,
4480                                                super_m->method_holder(),
4481                                                super_m->method_holder(),
4482                                                super_m->access_flags(), false))
4483             // this class can access super final method and therefore override
4484             ) {
4485             ResourceMark rm(THREAD);
4486             Exceptions::fthrow(
4487               THREAD_AND_LOCATION,
4488               vmSymbols::java_lang_VerifyError(),
4489               "class %s overrides final method %s.%s%s",
4490               this_klass->external_name(),
4491               super_m->method_holder()->external_name(),
4492               name->as_C_string(),
4493               signature->as_C_string()
4494             );
4495             return;
4496           }
4497 
4498           // continue to look from super_m's holder's super.
4499           k = super_m->method_holder()->super();
4500           continue;
4501         }
4502 
4503         k = k->super();
4504       }
4505     }
4506   }
4507 }
4508 
4509 
4510 // assumes that this_klass is an interface
4511 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
4512   assert(this_klass != NULL, "invariant");
4513   assert(this_klass->is_interface(), "not an interface");
4514   const Array<Method*>* methods = this_klass->methods();
4515   const int num_methods = methods->length();
4516 
4517   for (int index = 0; index < num_methods; index++) {
4518     const Method* const m = methods->at(index);
4519     // if m is static and not the init method, throw a verify error
4520     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
4521       ResourceMark rm(THREAD);
4522       Exceptions::fthrow(
4523         THREAD_AND_LOCATION,
4524         vmSymbols::java_lang_VerifyError(),
4525         "Illegal static method %s in interface %s",
4526         m->name()->as_C_string(),
4527         this_klass->external_name()
4528       );
4529       return;
4530     }
4531   }
4532 }
4533 
4534 // utility methods for format checking
4535 
4536 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const {
4537   if (!_need_verify) { return; }
4538 
4539   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
4540   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
4541   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
4542   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
4543   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
4544   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
4545   const bool is_module_info= (flags & JVM_ACC_MODULE)     != 0;
4546   const bool major_gte_15  = _major_version >= JAVA_1_5_VERSION;
4547 
4548   if ((is_abstract && is_final) ||
4549       (is_interface && !is_abstract) ||
4550       (is_interface && major_gte_15 && (is_super || is_enum)) ||
4551       (!is_interface && major_gte_15 && is_annotation) ||
4552       is_module_info) {
4553     ResourceMark rm(THREAD);
4554     Exceptions::fthrow(
4555       THREAD_AND_LOCATION,
4556       vmSymbols::java_lang_ClassFormatError(),
4557       "Illegal class modifiers in class %s: 0x%X",
4558       _class_name->as_C_string(), flags
4559     );
4560     return;
4561   }
4562 }
4563 
4564 static bool has_illegal_visibility(jint flags) {
4565   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4566   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4567   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4568 
4569   return ((is_public && is_protected) ||
4570           (is_public && is_private) ||
4571           (is_protected && is_private));
4572 }
4573 
4574 static bool is_supported_version(u2 major, u2 minor){
4575   const u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
4576   return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
4577          (major <= max_version) &&
4578          ((major != max_version) ||
4579           (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
4580 }
4581 
4582 void ClassFileParser::verify_legal_field_modifiers(jint flags,
4583                                                    bool is_interface,
4584                                                    TRAPS) const {
4585   if (!_need_verify) { return; }
4586 
4587   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
4588   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
4589   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
4590   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
4591   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
4592   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
4593   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
4594   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
4595   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
4596 
4597   bool is_illegal = false;
4598 
4599   if (is_interface) {
4600     if (!is_public || !is_static || !is_final || is_private ||
4601         is_protected || is_volatile || is_transient ||
4602         (major_gte_15 && is_enum)) {
4603       is_illegal = true;
4604     }
4605   } else { // not interface
4606     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
4607       is_illegal = true;
4608     }
4609   }
4610 
4611   if (is_illegal) {
4612     ResourceMark rm(THREAD);
4613     Exceptions::fthrow(
4614       THREAD_AND_LOCATION,
4615       vmSymbols::java_lang_ClassFormatError(),
4616       "Illegal field modifiers in class %s: 0x%X",
4617       _class_name->as_C_string(), flags);
4618     return;
4619   }
4620 }
4621 
4622 void ClassFileParser::verify_legal_method_modifiers(jint flags,
4623                                                     bool is_interface,
4624                                                     const Symbol* name,
4625                                                     TRAPS) const {
4626   if (!_need_verify) { return; }
4627 
4628   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
4629   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
4630   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
4631   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
4632   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
4633   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
4634   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
4635   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
4636   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
4637   const bool is_protected    = (flags & JVM_ACC_PROTECTED)    != 0;
4638   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
4639   const bool major_gte_8     = _major_version >= JAVA_8_VERSION;
4640   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
4641 
4642   bool is_illegal = false;
4643 
4644   if (is_interface) {
4645     if (major_gte_8) {
4646       // Class file version is JAVA_8_VERSION or later Methods of
4647       // interfaces may set any of the flags except ACC_PROTECTED,
4648       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
4649       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
4650       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
4651           (is_native || is_protected || is_final || is_synchronized) ||
4652           // If a specific method of a class or interface has its
4653           // ACC_ABSTRACT flag set, it must not have any of its
4654           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
4655           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
4656           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
4657           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
4658           (is_abstract && (is_private || is_static || is_strict))) {
4659         is_illegal = true;
4660       }
4661     } else if (major_gte_15) {
4662       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
4663       if (!is_public || is_private || is_protected || is_static || is_final ||
4664           is_synchronized || is_native || !is_abstract || is_strict) {
4665         is_illegal = true;
4666       }
4667     } else {
4668       // Class file version is pre-JAVA_1_5_VERSION
4669       if (!is_public || is_static || is_final || is_native || !is_abstract) {
4670         is_illegal = true;
4671       }
4672     }
4673   } else { // not interface
4674     if (has_illegal_visibility(flags)) {
4675       is_illegal = true;
4676     } else {
4677       if (is_initializer) {
4678         if (is_static || is_final || is_synchronized || is_native ||
4679             is_abstract || (major_gte_15 && is_bridge)) {
4680           is_illegal = true;
4681         }
4682       } else { // not initializer
4683         if (is_abstract) {
4684           if ((is_final || is_native || is_private || is_static ||
4685               (major_gte_15 && (is_synchronized || is_strict)))) {
4686             is_illegal = true;
4687           }
4688         }
4689       }
4690     }
4691   }
4692 
4693   if (is_illegal) {
4694     ResourceMark rm(THREAD);
4695     Exceptions::fthrow(
4696       THREAD_AND_LOCATION,
4697       vmSymbols::java_lang_ClassFormatError(),
4698       "Method %s in class %s has illegal modifiers: 0x%X",
4699       name->as_C_string(), _class_name->as_C_string(), flags);
4700     return;
4701   }
4702 }
4703 
4704 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
4705                                         int length,
4706                                         TRAPS) const {
4707   assert(_need_verify, "only called when _need_verify is true");
4708   if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
4709     classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
4710   }
4711 }
4712 
4713 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
4714 // In class names, '/' separates unqualified names.  This is verified in this function also.
4715 // Method names also may not contain the characters '<' or '>', unless <init>
4716 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
4717 // method.  Because these names have been checked as special cases before
4718 // calling this method in verify_legal_method_name.
4719 //
4720 // This method is also called from the modular system APIs in modules.cpp
4721 // to verify the validity of module and package names.
4722 bool ClassFileParser::verify_unqualified_name(const char* name,
4723                                               unsigned int length,
4724                                               int type) {
4725   for (const char* p = name; p != name + length;) {
4726     jchar ch = *p;
4727     if (ch < 128) {
4728       if (ch == '.' || ch == ';' || ch == '[' ) {
4729         return false;   // do not permit '.', ';', or '['
4730       }
4731       if (ch == '/') {
4732         // check for '//' or leading or trailing '/' which are not legal
4733         // unqualified name must not be empty
4734         if (type == ClassFileParser::LegalClass) {
4735           if (p == name || p+1 >= name+length || *(p+1) == '/') {
4736            return false;
4737           }
4738         } else {
4739           return false;   // do not permit '/' unless it's class name
4740         }
4741       }
4742       if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
4743         return false;   // do not permit '<' or '>' in method names
4744       }
4745       p++;
4746     } else {
4747       char* tmp_p = UTF8::next(p, &ch);
4748       p = tmp_p;
4749     }
4750   }
4751   return true;
4752 }
4753 
4754 // Take pointer to a string. Skip over the longest part of the string that could
4755 // be taken as a fieldname. Allow '/' if slash_ok is true.
4756 // Return a pointer to just past the fieldname.
4757 // Return NULL if no fieldname at all was found, or in the case of slash_ok
4758 // being true, we saw consecutive slashes (meaning we were looking for a
4759 // qualified path but found something that was badly-formed).
4760 static const char* skip_over_field_name(const char* name,
4761                                         bool slash_ok,
4762                                         unsigned int length) {
4763   const char* p;
4764   jboolean last_is_slash = false;
4765   jboolean not_first_ch = false;
4766 
4767   for (p = name; p != name + length; not_first_ch = true) {
4768     const char* old_p = p;
4769     jchar ch = *p;
4770     if (ch < 128) {
4771       p++;
4772       // quick check for ascii
4773       if ((ch >= 'a' && ch <= 'z') ||
4774         (ch >= 'A' && ch <= 'Z') ||
4775         (ch == '_' || ch == '$') ||
4776         (not_first_ch && ch >= '0' && ch <= '9')) {
4777         last_is_slash = false;
4778         continue;
4779       }
4780       if (slash_ok && ch == '/') {
4781         if (last_is_slash) {
4782           return NULL;  // Don't permit consecutive slashes
4783         }
4784         last_is_slash = true;
4785         continue;
4786       }
4787     }
4788     else {
4789       jint unicode_ch;
4790       char* tmp_p = UTF8::next_character(p, &unicode_ch);
4791       p = tmp_p;
4792       last_is_slash = false;
4793       // Check if ch is Java identifier start or is Java identifier part
4794       // 4672820: call java.lang.Character methods directly without generating separate tables.
4795       EXCEPTION_MARK;
4796 
4797       // return value
4798       JavaValue result(T_BOOLEAN);
4799       // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
4800       JavaCallArguments args;
4801       args.push_int(unicode_ch);
4802 
4803       // public static boolean isJavaIdentifierStart(char ch);
4804       JavaCalls::call_static(&result,
4805         SystemDictionary::Character_klass(),
4806         vmSymbols::isJavaIdentifierStart_name(),
4807         vmSymbols::int_bool_signature(),
4808         &args,
4809         THREAD);
4810 
4811       if (HAS_PENDING_EXCEPTION) {
4812         CLEAR_PENDING_EXCEPTION;
4813         return 0;
4814       }
4815       if (result.get_jboolean()) {
4816         continue;
4817       }
4818 
4819       if (not_first_ch) {
4820         // public static boolean isJavaIdentifierPart(char ch);
4821         JavaCalls::call_static(&result,
4822           SystemDictionary::Character_klass(),
4823           vmSymbols::isJavaIdentifierPart_name(),
4824           vmSymbols::int_bool_signature(),
4825           &args,
4826           THREAD);
4827 
4828         if (HAS_PENDING_EXCEPTION) {
4829           CLEAR_PENDING_EXCEPTION;
4830           return 0;
4831         }
4832 
4833         if (result.get_jboolean()) {
4834           continue;
4835         }
4836       }
4837     }
4838     return (not_first_ch) ? old_p : NULL;
4839   }
4840   return (not_first_ch) ? p : NULL;
4841 }
4842 
4843 // Take pointer to a string. Skip over the longest part of the string that could
4844 // be taken as a field signature. Allow "void" if void_ok.
4845 // Return a pointer to just past the signature.
4846 // Return NULL if no legal signature is found.
4847 const char* ClassFileParser::skip_over_field_signature(const char* signature,
4848                                                        bool void_ok,
4849                                                        unsigned int length,
4850                                                        TRAPS) const {
4851   unsigned int array_dim = 0;
4852   while (length > 0) {
4853     switch (signature[0]) {
4854     case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
4855     case JVM_SIGNATURE_BOOLEAN:
4856     case JVM_SIGNATURE_BYTE:
4857     case JVM_SIGNATURE_CHAR:
4858     case JVM_SIGNATURE_SHORT:
4859     case JVM_SIGNATURE_INT:
4860     case JVM_SIGNATURE_FLOAT:
4861     case JVM_SIGNATURE_LONG:
4862     case JVM_SIGNATURE_DOUBLE:
4863       return signature + 1;
4864     case JVM_SIGNATURE_CLASS: {
4865       if (_major_version < JAVA_1_5_VERSION) {
4866         // Skip over the class name if one is there
4867         const char* const p = skip_over_field_name(signature + 1, true, --length);
4868 
4869         // The next character better be a semicolon
4870         if (p && (p - signature) > 1 && p[0] == ';') {
4871           return p + 1;
4872         }
4873       }
4874       else {
4875         // Skip leading 'L' and ignore first appearance of ';'
4876         length--;
4877         signature++;
4878         char* c = strchr((char*) signature, ';');
4879         // Format check signature
4880         if (c != NULL) {
4881           ResourceMark rm(THREAD);
4882           int newlen = c - (char*) signature;
4883           char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
4884           strncpy(sig, signature, newlen);
4885           sig[newlen] = '\0';
4886 
4887           bool legal = verify_unqualified_name(sig, newlen, LegalClass);
4888           if (!legal) {
4889             classfile_parse_error("Class name contains illegal character "
4890                                   "in descriptor in class file %s",
4891                                   CHECK_0);
4892             return NULL;
4893           }
4894           return signature + newlen + 1;
4895         }
4896       }
4897       return NULL;
4898     }
4899     case JVM_SIGNATURE_ARRAY:
4900       array_dim++;
4901       if (array_dim > 255) {
4902         // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
4903         classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
4904       }
4905       // The rest of what's there better be a legal signature
4906       signature++;
4907       length--;
4908       void_ok = false;
4909       break;
4910     default:
4911       return NULL;
4912     }
4913   }
4914   return NULL;
4915 }
4916 
4917 // Checks if name is a legal class name.
4918 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
4919   if (!_need_verify || _relax_verify) { return; }
4920 
4921   char buf[fixed_buffer_size];
4922   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4923   unsigned int length = name->utf8_length();
4924   bool legal = false;
4925 
4926   if (length > 0) {
4927     const char* p;
4928     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
4929       p = skip_over_field_signature(bytes, false, length, CHECK);
4930       legal = (p != NULL) && ((p - bytes) == (int)length);
4931     } else if (_major_version < JAVA_1_5_VERSION) {
4932       if (bytes[0] != '<') {
4933         p = skip_over_field_name(bytes, true, length);
4934         legal = (p != NULL) && ((p - bytes) == (int)length);
4935       }
4936     } else {
4937       // 4900761: relax the constraints based on JSR202 spec
4938       // Class names may be drawn from the entire Unicode character set.
4939       // Identifiers between '/' must be unqualified names.
4940       // The utf8 string has been verified when parsing cpool entries.
4941       legal = verify_unqualified_name(bytes, length, LegalClass);
4942     }
4943   }
4944   if (!legal) {
4945     ResourceMark rm(THREAD);
4946     assert(_class_name != NULL, "invariant");
4947     Exceptions::fthrow(
4948       THREAD_AND_LOCATION,
4949       vmSymbols::java_lang_ClassFormatError(),
4950       "Illegal class name \"%s\" in class file %s", bytes,
4951       _class_name->as_C_string()
4952     );
4953     return;
4954   }
4955 }
4956 
4957 // Checks if name is a legal field name.
4958 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const {
4959   if (!_need_verify || _relax_verify) { return; }
4960 
4961   char buf[fixed_buffer_size];
4962   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4963   unsigned int length = name->utf8_length();
4964   bool legal = false;
4965 
4966   if (length > 0) {
4967     if (_major_version < JAVA_1_5_VERSION) {
4968       if (bytes[0] != '<') {
4969         const char* p = skip_over_field_name(bytes, false, length);
4970         legal = (p != NULL) && ((p - bytes) == (int)length);
4971       }
4972     } else {
4973       // 4881221: relax the constraints based on JSR202 spec
4974       legal = verify_unqualified_name(bytes, length, LegalField);
4975     }
4976   }
4977 
4978   if (!legal) {
4979     ResourceMark rm(THREAD);
4980     assert(_class_name != NULL, "invariant");
4981     Exceptions::fthrow(
4982       THREAD_AND_LOCATION,
4983       vmSymbols::java_lang_ClassFormatError(),
4984       "Illegal field name \"%s\" in class %s", bytes,
4985       _class_name->as_C_string()
4986     );
4987     return;
4988   }
4989 }
4990 
4991 // Checks if name is a legal method name.
4992 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const {
4993   if (!_need_verify || _relax_verify) { return; }
4994 
4995   assert(name != NULL, "method name is null");
4996   char buf[fixed_buffer_size];
4997   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
4998   unsigned int length = name->utf8_length();
4999   bool legal = false;
5000 
5001   if (length > 0) {
5002     if (bytes[0] == '<') {
5003       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
5004         legal = true;
5005       }
5006     } else if (_major_version < JAVA_1_5_VERSION) {
5007       const char* p;
5008       p = skip_over_field_name(bytes, false, length);
5009       legal = (p != NULL) && ((p - bytes) == (int)length);
5010     } else {
5011       // 4881221: relax the constraints based on JSR202 spec
5012       legal = verify_unqualified_name(bytes, length, LegalMethod);
5013     }
5014   }
5015 
5016   if (!legal) {
5017     ResourceMark rm(THREAD);
5018     assert(_class_name != NULL, "invariant");
5019     Exceptions::fthrow(
5020       THREAD_AND_LOCATION,
5021       vmSymbols::java_lang_ClassFormatError(),
5022       "Illegal method name \"%s\" in class %s", bytes,
5023       _class_name->as_C_string()
5024     );
5025     return;
5026   }
5027 }
5028 
5029 
5030 // Checks if signature is a legal field signature.
5031 void ClassFileParser::verify_legal_field_signature(const Symbol* name,
5032                                                    const Symbol* signature,
5033                                                    TRAPS) const {
5034   if (!_need_verify) { return; }
5035 
5036   char buf[fixed_buffer_size];
5037   const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5038   const unsigned int length = signature->utf8_length();
5039   const char* const p = skip_over_field_signature(bytes, false, length, CHECK);
5040 
5041   if (p == NULL || (p - bytes) != (int)length) {
5042     throwIllegalSignature("Field", name, signature, CHECK);
5043   }
5044 }
5045 
5046 // Checks if signature is a legal method signature.
5047 // Returns number of parameters
5048 int ClassFileParser::verify_legal_method_signature(const Symbol* name,
5049                                                    const Symbol* signature,
5050                                                    TRAPS) const {
5051   if (!_need_verify) {
5052     // make sure caller's args_size will be less than 0 even for non-static
5053     // method so it will be recomputed in compute_size_of_parameters().
5054     return -2;
5055   }
5056 
5057   // Class initializers cannot have args for class format version >= 51.
5058   if (name == vmSymbols::class_initializer_name() &&
5059       signature != vmSymbols::void_method_signature() &&
5060       _major_version >= JAVA_7_VERSION) {
5061     throwIllegalSignature("Method", name, signature, CHECK_0);
5062     return 0;
5063   }
5064 
5065   unsigned int args_size = 0;
5066   char buf[fixed_buffer_size];
5067   const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
5068   unsigned int length = signature->utf8_length();
5069   const char* nextp;
5070 
5071   // The first character must be a '('
5072   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
5073     length--;
5074     // Skip over legal field signatures
5075     nextp = skip_over_field_signature(p, false, length, CHECK_0);
5076     while ((length > 0) && (nextp != NULL)) {
5077       args_size++;
5078       if (p[0] == 'J' || p[0] == 'D') {
5079         args_size++;
5080       }
5081       length -= nextp - p;
5082       p = nextp;
5083       nextp = skip_over_field_signature(p, false, length, CHECK_0);
5084     }
5085     // The first non-signature thing better be a ')'
5086     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
5087       length--;
5088       if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
5089         // All internal methods must return void
5090         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
5091           return args_size;
5092         }
5093       } else {
5094         // Now we better just have a return value
5095         nextp = skip_over_field_signature(p, true, length, CHECK_0);
5096         if (nextp && ((int)length == (nextp - p))) {
5097           return args_size;
5098         }
5099       }
5100     }
5101   }
5102   // Report error
5103   throwIllegalSignature("Method", name, signature, CHECK_0);
5104   return 0;
5105 }
5106 
5107 int ClassFileParser::static_field_size() const {
5108   assert(_field_info != NULL, "invariant");
5109   return _field_info->static_field_size;
5110 }
5111 
5112 int ClassFileParser::total_oop_map_count() const {
5113   assert(_field_info != NULL, "invariant");
5114   return _field_info->total_oop_map_count;
5115 }
5116 
5117 jint ClassFileParser::layout_size() const {
5118   assert(_field_info != NULL, "invariant");
5119   return _field_info->instance_size;
5120 }
5121 
5122 static void check_methods_for_intrinsics(const InstanceKlass* ik,
5123                                          const Array<Method*>* methods) {
5124   assert(ik != NULL, "invariant");
5125   assert(methods != NULL, "invariant");
5126 
5127   // Set up Method*::intrinsic_id as soon as we know the names of methods.
5128   // (We used to do this lazily, but now we query it in Rewriter,
5129   // which is eagerly done for every method, so we might as well do it now,
5130   // when everything is fresh in memory.)
5131   const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
5132 
5133   if (klass_id != vmSymbols::NO_SID) {
5134     for (int j = 0; j < methods->length(); ++j) {
5135       Method* method = methods->at(j);
5136       method->init_intrinsic_id();
5137 
5138       if (CheckIntrinsics) {
5139         // Check if an intrinsic is defined for method 'method',
5140         // but the method is not annotated with @HotSpotIntrinsicCandidate.
5141         if (method->intrinsic_id() != vmIntrinsics::_none &&
5142             !method->intrinsic_candidate()) {
5143               tty->print("Compiler intrinsic is defined for method [%s], "
5144               "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
5145               method->name_and_sig_as_C_string(),
5146               NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
5147             );
5148           tty->cr();
5149           DEBUG_ONLY(vm_exit(1));
5150         }
5151         // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
5152         // but there is no intrinsic available for it.
5153         if (method->intrinsic_candidate() &&
5154           method->intrinsic_id() == vmIntrinsics::_none) {
5155             tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
5156               "but no compiler intrinsic is defined for the method.%s",
5157               method->name_and_sig_as_C_string(),
5158               NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5159             );
5160           tty->cr();
5161           DEBUG_ONLY(vm_exit(1));
5162         }
5163       }
5164     } // end for
5165 
5166 #ifdef ASSERT
5167     if (CheckIntrinsics) {
5168       // Check for orphan methods in the current class. A method m
5169       // of a class C is orphan if an intrinsic is defined for method m,
5170       // but class C does not declare m.
5171       // The check is potentially expensive, therefore it is available
5172       // only in debug builds.
5173 
5174       for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
5175         if (vmIntrinsics::_compiledLambdaForm == id) {
5176           // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
5177           // generated for the JVM from a LambdaForm and therefore no method
5178           // is defined for it.
5179           continue;
5180         }
5181 
5182         if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
5183           // Check if the current class contains a method with the same
5184           // name, flags, signature.
5185           bool match = false;
5186           for (int j = 0; j < methods->length(); ++j) {
5187             const Method* method = methods->at(j);
5188             if (method->intrinsic_id() == id) {
5189               match = true;
5190               break;
5191             }
5192           }
5193 
5194           if (!match) {
5195             char buf[1000];
5196             tty->print("Compiler intrinsic is defined for method [%s], "
5197                        "but the method is not available in class [%s].%s",
5198                         vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
5199                                                              buf, sizeof(buf)),
5200                         ik->name()->as_C_string(),
5201                         NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
5202             );
5203             tty->cr();
5204             DEBUG_ONLY(vm_exit(1));
5205           }
5206         }
5207       } // end for
5208     } // CheckIntrinsics
5209 #endif // ASSERT
5210   }
5211 }
5212 
5213 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
5214   if (_klass != NULL) {
5215     return _klass;
5216   }
5217 
5218   InstanceKlass* const ik =
5219     InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
5220 
5221   fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
5222 
5223   assert(_klass == ik, "invariant");
5224 
5225   ik->set_has_passed_fingerprint_check(false);
5226   if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
5227     uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
5228     if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
5229       // This class matches with a class saved in an AOT library
5230       ik->set_has_passed_fingerprint_check(true);
5231     } else {
5232       ResourceMark rm;
5233       log_info(class, fingerprint)("%s :  expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
5234                                  ik->external_name(), aot_fp, _stream->compute_fingerprint());
5235     }
5236   }
5237 
5238   return ik;
5239 }
5240 
5241 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
5242   assert(ik != NULL, "invariant");
5243 
5244   set_klass_to_deallocate(ik);
5245 
5246   assert(_field_info != NULL, "invariant");
5247   assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
5248   assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
5249     "sanity");
5250 
5251   assert(ik->is_instance_klass(), "sanity");
5252   assert(ik->size_helper() == _field_info->instance_size, "sanity");
5253 
5254   // Fill in information already parsed
5255   ik->set_should_verify_class(_need_verify);
5256 
5257   // Not yet: supers are done below to support the new subtype-checking fields
5258   ik->set_class_loader_data(_loader_data);
5259   ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
5260   ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
5261   assert(_fac != NULL, "invariant");
5262   ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
5263 
5264   // this transfers ownership of a lot of arrays from
5265   // the parser onto the InstanceKlass*
5266   apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
5267 
5268   // note that is not safe to use the fields in the parser from this point on
5269   assert(NULL == _cp, "invariant");
5270   assert(NULL == _fields, "invariant");
5271   assert(NULL == _methods, "invariant");
5272   assert(NULL == _inner_classes, "invariant");
5273   assert(NULL == _local_interfaces, "invariant");
5274   assert(NULL == _transitive_interfaces, "invariant");
5275   assert(NULL == _combined_annotations, "invariant");
5276 
5277   if (_has_final_method) {
5278     ik->set_has_final_method();
5279   }
5280 
5281   ik->copy_method_ordering(_method_ordering, CHECK);
5282   // The InstanceKlass::_methods_jmethod_ids cache
5283   // is managed on the assumption that the initial cache
5284   // size is equal to the number of methods in the class. If
5285   // that changes, then InstanceKlass::idnum_can_increment()
5286   // has to be changed accordingly.
5287   ik->set_initial_method_idnum(ik->methods()->length());
5288 
5289   ik->set_name(_class_name);
5290 
5291   if (is_anonymous()) {
5292     // I am well known to myself
5293     ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve
5294   }
5295 
5296   ik->set_minor_version(_minor_version);
5297   ik->set_major_version(_major_version);
5298   ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
5299   ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
5300 
5301   if (_host_klass != NULL) {
5302     assert (ik->is_anonymous(), "should be the same");
5303     ik->set_host_klass(_host_klass);
5304   }
5305 
5306   // Set PackageEntry for this_klass
5307   oop cl = ik->class_loader();
5308   Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
5309   ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
5310   ik->set_package(cld, CHECK);
5311 
5312   const Array<Method*>* const methods = ik->methods();
5313   assert(methods != NULL, "invariant");
5314   const int methods_len = methods->length();
5315 
5316   check_methods_for_intrinsics(ik, methods);
5317 
5318   // Fill in field values obtained by parse_classfile_attributes
5319   if (_parsed_annotations->has_any_annotations()) {
5320     _parsed_annotations->apply_to(ik);
5321   }
5322 
5323   apply_parsed_class_attributes(ik);
5324 
5325   // Miranda methods
5326   if ((_num_miranda_methods > 0) ||
5327       // if this class introduced new miranda methods or
5328       (_super_klass != NULL && _super_klass->has_miranda_methods())
5329         // super class exists and this class inherited miranda methods
5330      ) {
5331        ik->set_has_miranda_methods(); // then set a flag
5332   }
5333 
5334   // Fill in information needed to compute superclasses.
5335   ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
5336 
5337   // Initialize itable offset tables
5338   klassItable::setup_itable_offset_table(ik);
5339 
5340   // Compute transitive closure of interfaces this class implements
5341   // Do final class setup
5342   fill_oop_maps(ik,
5343                 _field_info->nonstatic_oop_map_count,
5344                 _field_info->nonstatic_oop_offsets,
5345                 _field_info->nonstatic_oop_counts);
5346 
5347   // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
5348   set_precomputed_flags(ik);
5349 
5350   // check if this class can access its super class
5351   check_super_class_access(ik, CHECK);
5352 
5353   // check if this class can access its superinterfaces
5354   check_super_interface_access(ik, CHECK);
5355 
5356   // check if this class overrides any final method
5357   check_final_method_override(ik, CHECK);
5358 
5359   // reject static interface methods prior to Java 8
5360   if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
5361     check_illegal_static_method(ik, CHECK);
5362   }
5363 
5364   // Obtain this_klass' module entry
5365   ModuleEntry* module_entry = ik->module();
5366   assert(module_entry != NULL, "module_entry should always be set");
5367 
5368   // Obtain java.lang.reflect.Module
5369   Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module()));
5370 
5371   // Allocate mirror and initialize static fields
5372   // The create_mirror() call will also call compute_modifiers()
5373   java_lang_Class::create_mirror(ik,
5374                                  Handle(THREAD, _loader_data->class_loader()),
5375                                  module_handle,
5376                                  _protection_domain,
5377                                  CHECK);
5378 
5379   assert(_all_mirandas != NULL, "invariant");
5380 
5381   // Generate any default methods - default methods are public interface methods
5382   // that have a default implementation.  This is new with Java 8.
5383   if (_has_nonstatic_concrete_methods) {
5384     DefaultMethods::generate_default_methods(ik,
5385                                              _all_mirandas,
5386                                              CHECK);
5387   }
5388 
5389   // Add read edges to the unnamed modules of the bootstrap and app class loaders.
5390   if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
5391       !module_entry->has_default_read_edges()) {
5392     if (!module_entry->set_has_default_read_edges()) {
5393       // We won a potential race
5394       JvmtiExport::add_default_read_edges(module_handle, THREAD);
5395     }
5396   }
5397 
5398   // Update the loader_data graph.
5399   record_defined_class_dependencies(ik, CHECK);
5400 
5401   ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
5402 
5403   if (!is_internal()) {
5404     if (log_is_enabled(Info, class, load)) {
5405       ResourceMark rm;
5406       const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
5407 
5408       if (log_is_enabled(Info, class, load)) {
5409         ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream);
5410       }
5411       // No 'else' here as logging levels are not mutually exclusive
5412       if (log_is_enabled(Debug, class, load)) {
5413         ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream);
5414       }
5415     }
5416 
5417     if (log_is_enabled(Debug, class, resolve))  {
5418       ResourceMark rm;
5419       // print out the superclass.
5420       const char * from = ik->external_name();
5421       if (ik->java_super() != NULL) {
5422         log_debug(class, resolve)("%s %s (super)",
5423                    from,
5424                    ik->java_super()->external_name());
5425       }
5426       // print out each of the interface classes referred to by this class.
5427       const Array<Klass*>* const local_interfaces = ik->local_interfaces();
5428       if (local_interfaces != NULL) {
5429         const int length = local_interfaces->length();
5430         for (int i = 0; i < length; i++) {
5431           const Klass* const k = local_interfaces->at(i);
5432           const char * to = k->external_name();
5433           log_debug(class, resolve)("%s %s (interface)", from, to);
5434         }
5435       }
5436     }
5437   }
5438 
5439   TRACE_INIT_ID(ik);
5440 
5441   // If we reach here, all is well.
5442   // Now remove the InstanceKlass* from the _klass_to_deallocate field
5443   // in order for it to not be destroyed in the ClassFileParser destructor.
5444   set_klass_to_deallocate(NULL);
5445 
5446   // it's official
5447   set_klass(ik);
5448 
5449   debug_only(ik->verify();)
5450 }
5451 
5452 // For an anonymous class that is in the unnamed package, move it to its host class's
5453 // package by prepending its host class's package name to its class name and setting
5454 // its _class_name field.
5455 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
5456   ResourceMark rm(THREAD);
5457   assert(strrchr(_class_name->as_C_string(), '/') == NULL,
5458          "Anonymous class should not be in a package");
5459   const char* host_pkg_name =
5460     ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
5461 
5462   if (host_pkg_name != NULL) {
5463     size_t host_pkg_len = strlen(host_pkg_name);
5464     int class_name_len = _class_name->utf8_length();
5465     char* new_anon_name =
5466       NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
5467     // Copy host package name and trailing /.
5468     strncpy(new_anon_name, host_pkg_name, host_pkg_len);
5469     new_anon_name[host_pkg_len] = '/';
5470     // Append anonymous class name. The anonymous class name can contain odd
5471     // characters.  So, do a strncpy instead of using sprintf("%s...").
5472     strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
5473 
5474     // Create a symbol and update the anonymous class name.
5475     _class_name = SymbolTable::new_symbol(new_anon_name,
5476                                           (int)host_pkg_len + 1 + class_name_len,
5477                                           CHECK);
5478   }
5479 }
5480 
5481 // If the host class and the anonymous class are in the same package then do
5482 // nothing.  If the anonymous class is in the unnamed package then move it to its
5483 // host's package.  If the classes are in different packages then throw an IAE
5484 // exception.
5485 void ClassFileParser::fix_anonymous_class_name(TRAPS) {
5486   assert(_host_klass != NULL, "Expected an anonymous class");
5487 
5488   const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
5489                                                _class_name->utf8_length(), '/');
5490   if (anon_last_slash == NULL) {  // Unnamed package
5491     prepend_host_package_name(_host_klass, CHECK);
5492   } else {
5493     if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(),
5494                                               _host_klass->name(),
5495                                               _host_klass->class_loader(),
5496                                               _class_name)) {
5497       ResourceMark rm(THREAD);
5498       THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
5499         err_msg("Host class %s and anonymous class %s are in different packages",
5500         _host_klass->name()->as_C_string(), _class_name->as_C_string()));
5501     }
5502   }
5503 }
5504 
5505 static bool relax_format_check_for(ClassLoaderData* loader_data) {
5506   bool trusted = (loader_data->is_the_null_class_loader_data() ||
5507                   SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
5508   bool need_verify =
5509     // verifyAll
5510     (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
5511     // verifyRemote
5512     (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
5513   return !need_verify;
5514 }
5515 
5516 ClassFileParser::ClassFileParser(ClassFileStream* stream,
5517                                  Symbol* name,
5518                                  ClassLoaderData* loader_data,
5519                                  Handle protection_domain,
5520                                  const InstanceKlass* host_klass,
5521                                  GrowableArray<Handle>* cp_patches,
5522                                  Publicity pub_level,
5523                                  TRAPS) :
5524   _stream(stream),
5525   _requested_name(name),
5526   _loader_data(loader_data),
5527   _host_klass(host_klass),
5528   _cp_patches(cp_patches),
5529   _super_klass(),
5530   _cp(NULL),
5531   _fields(NULL),
5532   _methods(NULL),
5533   _inner_classes(NULL),
5534   _local_interfaces(NULL),
5535   _transitive_interfaces(NULL),
5536   _combined_annotations(NULL),
5537   _annotations(NULL),
5538   _type_annotations(NULL),
5539   _fields_annotations(NULL),
5540   _fields_type_annotations(NULL),
5541   _klass(NULL),
5542   _klass_to_deallocate(NULL),
5543   _parsed_annotations(NULL),
5544   _fac(NULL),
5545   _field_info(NULL),
5546   _method_ordering(NULL),
5547   _all_mirandas(NULL),
5548   _vtable_size(0),
5549   _itable_size(0),
5550   _num_miranda_methods(0),
5551   _rt(REF_NONE),
5552   _protection_domain(protection_domain),
5553   _access_flags(),
5554   _pub_level(pub_level),
5555   _synthetic_flag(false),
5556   _sde_length(false),
5557   _sde_buffer(NULL),
5558   _sourcefile_index(0),
5559   _generic_signature_index(0),
5560   _major_version(0),
5561   _minor_version(0),
5562   _this_class_index(0),
5563   _super_class_index(0),
5564   _itfs_len(0),
5565   _java_fields_count(0),
5566   _need_verify(false),
5567   _relax_verify(false),
5568   _has_nonstatic_concrete_methods(false),
5569   _declares_nonstatic_concrete_methods(false),
5570   _has_final_method(false),
5571   _has_finalizer(false),
5572   _has_empty_finalizer(false),
5573   _has_vanilla_constructor(false),
5574   _max_bootstrap_specifier_index(-1) {
5575 
5576   _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
5577 
5578   assert(THREAD->is_Java_thread(), "invariant");
5579   assert(_loader_data != NULL, "invariant");
5580   assert(stream != NULL, "invariant");
5581   assert(_stream != NULL, "invariant");
5582   assert(_stream->buffer() == _stream->current(), "invariant");
5583   assert(_class_name != NULL, "invariant");
5584   assert(0 == _access_flags.as_int(), "invariant");
5585 
5586   // Figure out whether we can skip format checking (matching classic VM behavior)
5587   if (DumpSharedSpaces) {
5588     // verify == true means it's a 'remote' class (i.e., non-boot class)
5589     // Verification decision is based on BytecodeVerificationRemote flag
5590     // for those classes.
5591     _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote :
5592                                               BytecodeVerificationLocal;
5593   }
5594   else {
5595     _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
5596                                                stream->need_verify());
5597   }
5598 
5599   // synch back verification state to stream
5600   stream->set_verify(_need_verify);
5601 
5602   // Check if verification needs to be relaxed for this class file
5603   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
5604   _relax_verify = relax_format_check_for(_loader_data);
5605 
5606   parse_stream(stream, CHECK);
5607 
5608   post_process_parsed_stream(stream, _cp, CHECK);
5609 }
5610 
5611 void ClassFileParser::clear_class_metadata() {
5612   // metadata created before the instance klass is created.  Must be
5613   // deallocated if classfile parsing returns an error.
5614   _cp = NULL;
5615   _fields = NULL;
5616   _methods = NULL;
5617   _inner_classes = NULL;
5618   _local_interfaces = NULL;
5619   _transitive_interfaces = NULL;
5620   _combined_annotations = NULL;
5621   _annotations = _type_annotations = NULL;
5622   _fields_annotations = _fields_type_annotations = NULL;
5623 }
5624 
5625 // Destructor to clean up
5626 ClassFileParser::~ClassFileParser() {
5627   if (_cp != NULL) {
5628     MetadataFactory::free_metadata(_loader_data, _cp);
5629   }
5630   if (_fields != NULL) {
5631     MetadataFactory::free_array<u2>(_loader_data, _fields);
5632   }
5633 
5634   if (_methods != NULL) {
5635     // Free methods
5636     InstanceKlass::deallocate_methods(_loader_data, _methods);
5637   }
5638 
5639   // beware of the Universe::empty_blah_array!!
5640   if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) {
5641     MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
5642   }
5643 
5644   // Free interfaces
5645   InstanceKlass::deallocate_interfaces(_loader_data, _super_klass,
5646                                        _local_interfaces, _transitive_interfaces);
5647 
5648   if (_combined_annotations != NULL) {
5649     // After all annotations arrays have been created, they are installed into the
5650     // Annotations object that will be assigned to the InstanceKlass being created.
5651 
5652     // Deallocate the Annotations object and the installed annotations arrays.
5653     _combined_annotations->deallocate_contents(_loader_data);
5654 
5655     // If the _combined_annotations pointer is non-NULL,
5656     // then the other annotations fields should have been cleared.
5657     assert(_annotations             == NULL, "Should have been cleared");
5658     assert(_type_annotations        == NULL, "Should have been cleared");
5659     assert(_fields_annotations      == NULL, "Should have been cleared");
5660     assert(_fields_type_annotations == NULL, "Should have been cleared");
5661   } else {
5662     // If the annotations arrays were not installed into the Annotations object,
5663     // then they have to be deallocated explicitly.
5664     MetadataFactory::free_array<u1>(_loader_data, _annotations);
5665     MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
5666     Annotations::free_contents(_loader_data, _fields_annotations);
5667     Annotations::free_contents(_loader_data, _fields_type_annotations);
5668   }
5669 
5670   clear_class_metadata();
5671 
5672   // deallocate the klass if already created.  Don't directly deallocate, but add
5673   // to the deallocate list so that the klass is removed from the CLD::_klasses list
5674   // at a safepoint.
5675   if (_klass_to_deallocate != NULL) {
5676     _loader_data->add_to_deallocate_list(_klass_to_deallocate);
5677   }
5678 }
5679 
5680 void ClassFileParser::parse_stream(const ClassFileStream* const stream,
5681                                    TRAPS) {
5682 
5683   assert(stream != NULL, "invariant");
5684   assert(_class_name != NULL, "invariant");
5685 
5686   // BEGIN STREAM PARSING
5687   stream->guarantee_more(8, CHECK);  // magic, major, minor
5688   // Magic value
5689   const u4 magic = stream->get_u4_fast();
5690   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
5691                      "Incompatible magic value %u in class file %s",
5692                      magic, CHECK);
5693 
5694   // Version numbers
5695   _minor_version = stream->get_u2_fast();
5696   _major_version = stream->get_u2_fast();
5697 
5698   if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) {
5699     ResourceMark rm;
5700     warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
5701             _major_version,  _minor_version, _class_name->as_C_string());
5702     Exceptions::fthrow(
5703       THREAD_AND_LOCATION,
5704       vmSymbols::java_lang_UnsupportedClassVersionError(),
5705       "Unsupported major.minor version for dump time %u.%u",
5706       _major_version,
5707       _minor_version);
5708   }
5709 
5710   // Check version numbers - we check this even with verifier off
5711   if (!is_supported_version(_major_version, _minor_version)) {
5712     ResourceMark rm(THREAD);
5713     Exceptions::fthrow(
5714       THREAD_AND_LOCATION,
5715       vmSymbols::java_lang_UnsupportedClassVersionError(),
5716       "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
5717       "this version of the Java Runtime only recognizes class file versions up to %u.%u",
5718       _class_name->as_C_string(),
5719       _major_version,
5720       _minor_version,
5721       JAVA_MAX_SUPPORTED_VERSION,
5722       JAVA_MAX_SUPPORTED_MINOR_VERSION);
5723     return;
5724   }
5725 
5726   stream->guarantee_more(3, CHECK); // length, first cp tag
5727   const u2 cp_size = stream->get_u2_fast();
5728 
5729   guarantee_property(
5730     cp_size >= 1, "Illegal constant pool size %u in class file %s",
5731     cp_size, CHECK);
5732 
5733   _cp = ConstantPool::allocate(_loader_data,
5734                                cp_size,
5735                                CHECK);
5736 
5737   ConstantPool* const cp = _cp;
5738 
5739   parse_constant_pool(stream, cp, cp_size, CHECK);
5740 
5741   assert(cp_size == (const u2)cp->length(), "invariant");
5742 
5743   // ACCESS FLAGS
5744   stream->guarantee_more(8, CHECK);  // flags, this_class, super_class, infs_len
5745 
5746   // Access flags
5747   jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
5748 
5749   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
5750     // Set abstract bit for old class files for backward compatibility
5751     flags |= JVM_ACC_ABSTRACT;
5752   }
5753 
5754   _access_flags.set_flags(flags);
5755 
5756   verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK);
5757 
5758   // This class and superclass
5759   _this_class_index = stream->get_u2_fast();
5760   check_property(
5761     valid_cp_range(_this_class_index, cp_size) &&
5762       cp->tag_at(_this_class_index).is_unresolved_klass(),
5763     "Invalid this class index %u in constant pool in class file %s",
5764     _this_class_index, CHECK);
5765 
5766   Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
5767   assert(class_name_in_cp != NULL, "class_name can't be null");
5768 
5769   // Update _class_name which could be null previously
5770   // to reflect the name in the constant pool
5771   _class_name = class_name_in_cp;
5772 
5773   // Don't need to check whether this class name is legal or not.
5774   // It has been checked when constant pool is parsed.
5775   // However, make sure it is not an array type.
5776   if (_need_verify) {
5777     guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
5778                        "Bad class name in class file %s",
5779                        CHECK);
5780   }
5781 
5782   // Checks if name in class file matches requested name
5783   if (_requested_name != NULL && _requested_name != _class_name) {
5784     ResourceMark rm(THREAD);
5785     Exceptions::fthrow(
5786       THREAD_AND_LOCATION,
5787       vmSymbols::java_lang_NoClassDefFoundError(),
5788       "%s (wrong name: %s)",
5789       _class_name->as_C_string(),
5790       _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
5791     );
5792     return;
5793   }
5794 
5795   // if this is an anonymous class fix up its name if it's in the unnamed
5796   // package.  Otherwise, throw IAE if it is in a different package than
5797   // its host class.
5798   if (_host_klass != NULL) {
5799     fix_anonymous_class_name(CHECK);
5800   }
5801 
5802   // Verification prevents us from creating names with dots in them, this
5803   // asserts that that's the case.
5804   assert(is_internal_format(_class_name), "external class name format used internally");
5805 
5806   if (!is_internal()) {
5807     if (log_is_enabled(Debug, class, preorder)){
5808       ResourceMark rm(THREAD);
5809       outputStream* log = Log(class, preorder)::debug_stream();
5810       log->print("%s", _class_name->as_klass_external_name());
5811       if (stream->source() != NULL) {
5812         log->print(" source: %s", stream->source());
5813       }
5814       log->cr();
5815     }
5816 
5817 #if INCLUDE_CDS
5818     if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
5819       // Only dump the classes that can be stored into CDS archive.
5820       // Anonymous classes such as generated LambdaForm classes are also not included.
5821       if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
5822           _host_klass == NULL) {
5823         oop class_loader = _loader_data->class_loader();
5824         ResourceMark rm(THREAD);
5825         // For the boot and platform class loaders, check if the class is not found in the
5826         // java runtime image. Additional check for the boot class loader is if the class
5827         // is not found in the boot loader's appended entries. This indicates that the class
5828         // is not useable during run time, such as the ones found in the --patch-module entries,
5829         // so it should not be included in the classlist file.
5830         if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
5831              SystemDictionary::is_platform_class_loader(class_loader)) &&
5832             !ClassLoader::is_jrt(stream->source())) {
5833           tty->print_cr("skip writing class %s from source %s to classlist file",
5834             _class_name->as_C_string(), stream->source());
5835         } else {
5836           classlist_file->print_cr("%s", _class_name->as_C_string());
5837           classlist_file->flush();
5838         }
5839       }
5840     }
5841 #endif
5842   }
5843 
5844   // SUPERKLASS
5845   _super_class_index = stream->get_u2_fast();
5846   _super_klass = parse_super_class(cp,
5847                                    _super_class_index,
5848                                    _need_verify,
5849                                    CHECK);
5850 
5851   // Interfaces
5852   _itfs_len = stream->get_u2_fast();
5853   parse_interfaces(stream,
5854                    _itfs_len,
5855                    cp,
5856                    &_has_nonstatic_concrete_methods,
5857                    CHECK);
5858 
5859   assert(_local_interfaces != NULL, "invariant");
5860 
5861   // Fields (offsets are filled in later)
5862   _fac = new FieldAllocationCount();
5863   parse_fields(stream,
5864                _access_flags.is_interface(),
5865                _fac,
5866                cp,
5867                cp_size,
5868                &_java_fields_count,
5869                CHECK);
5870 
5871   assert(_fields != NULL, "invariant");
5872 
5873   // Methods
5874   AccessFlags promoted_flags;
5875   parse_methods(stream,
5876                 _access_flags.is_interface(),
5877                 &promoted_flags,
5878                 &_has_final_method,
5879                 &_declares_nonstatic_concrete_methods,
5880                 CHECK);
5881 
5882   assert(_methods != NULL, "invariant");
5883 
5884   // promote flags from parse_methods() to the klass' flags
5885   _access_flags.add_promoted_flags(promoted_flags.as_int());
5886 
5887   if (_declares_nonstatic_concrete_methods) {
5888     _has_nonstatic_concrete_methods = true;
5889   }
5890 
5891   // Additional attributes/annotations
5892   _parsed_annotations = new ClassAnnotationCollector();
5893   parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
5894 
5895   assert(_inner_classes != NULL, "invariant");
5896 
5897   // Finalize the Annotations metadata object,
5898   // now that all annotation arrays have been created.
5899   create_combined_annotations(CHECK);
5900 
5901   // Make sure this is the end of class file stream
5902   guarantee_property(stream->at_eos(),
5903                      "Extra bytes at the end of class file %s",
5904                      CHECK);
5905 
5906   // all bytes in stream read and parsed
5907 }
5908 
5909 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
5910                                                  ConstantPool* cp,
5911                                                  TRAPS) {
5912   assert(stream != NULL, "invariant");
5913   assert(stream->at_eos(), "invariant");
5914   assert(cp != NULL, "invariant");
5915   assert(_loader_data != NULL, "invariant");
5916 
5917   if (_class_name == vmSymbols::java_lang_Object()) {
5918     check_property(_local_interfaces == Universe::the_empty_klass_array(),
5919                    "java.lang.Object cannot implement an interface in class file %s",
5920                    CHECK);
5921   }
5922   // We check super class after class file is parsed and format is checked
5923   if (_super_class_index > 0 && NULL ==_super_klass) {
5924     Symbol* const super_class_name = cp->klass_name_at(_super_class_index);
5925     if (_access_flags.is_interface()) {
5926       // Before attempting to resolve the superclass, check for class format
5927       // errors not checked yet.
5928       guarantee_property(super_class_name == vmSymbols::java_lang_Object(),
5929         "Interfaces must have java.lang.Object as superclass in class file %s",
5930         CHECK);
5931     }
5932     Handle loader(THREAD, _loader_data->class_loader());
5933     _super_klass = (const InstanceKlass*)
5934                        SystemDictionary::resolve_super_or_fail(_class_name,
5935                                                                super_class_name,
5936                                                                loader,
5937                                                                _protection_domain,
5938                                                                true,
5939                                                                CHECK);
5940   }
5941 
5942   if (_super_klass != NULL) {
5943     if (_super_klass->has_nonstatic_concrete_methods()) {
5944       _has_nonstatic_concrete_methods = true;
5945     }
5946 
5947     if (_super_klass->is_interface()) {
5948       ResourceMark rm(THREAD);
5949       Exceptions::fthrow(
5950         THREAD_AND_LOCATION,
5951         vmSymbols::java_lang_IncompatibleClassChangeError(),
5952         "class %s has interface %s as super class",
5953         _class_name->as_klass_external_name(),
5954         _super_klass->external_name()
5955       );
5956       return;
5957     }
5958     // Make sure super class is not final
5959     if (_super_klass->is_final()) {
5960       THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
5961     }
5962   }
5963 
5964   // Compute the transitive list of all unique interfaces implemented by this class
5965   _transitive_interfaces =
5966     compute_transitive_interfaces(_super_klass,
5967                                   _local_interfaces,
5968                                   _loader_data,
5969                                   CHECK);
5970 
5971   assert(_transitive_interfaces != NULL, "invariant");
5972 
5973   // sort methods
5974   _method_ordering = sort_methods(_methods);
5975 
5976   _all_mirandas = new GrowableArray<Method*>(20);
5977 
5978   Handle loader(THREAD, _loader_data->class_loader());
5979   klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
5980                                                     &_num_miranda_methods,
5981                                                     _all_mirandas,
5982                                                     _super_klass,
5983                                                     _methods,
5984                                                     _access_flags,
5985                                                     _major_version,
5986                                                     loader,
5987                                                     _class_name,
5988                                                     _local_interfaces,
5989                                                     CHECK);
5990 
5991   // Size of Java itable (in words)
5992   _itable_size = _access_flags.is_interface() ? 0 :
5993     klassItable::compute_itable_size(_transitive_interfaces);
5994 
5995   assert(_fac != NULL, "invariant");
5996   assert(_parsed_annotations != NULL, "invariant");
5997 
5998   _field_info = new FieldLayoutInfo();
5999   layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
6000 
6001   // Compute reference typ
6002   _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
6003 
6004 }
6005 
6006 void ClassFileParser::set_klass(InstanceKlass* klass) {
6007 
6008 #ifdef ASSERT
6009   if (klass != NULL) {
6010     assert(NULL == _klass, "leaking?");
6011   }
6012 #endif
6013 
6014   _klass = klass;
6015 }
6016 
6017 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
6018 
6019 #ifdef ASSERT
6020   if (klass != NULL) {
6021     assert(NULL == _klass_to_deallocate, "leaking?");
6022   }
6023 #endif
6024 
6025   _klass_to_deallocate = klass;
6026 }
6027 
6028 // Caller responsible for ResourceMark
6029 // clone stream with rewound position
6030 const ClassFileStream* ClassFileParser::clone_stream() const {
6031   assert(_stream != NULL, "invariant");
6032 
6033   return _stream->clone();
6034 }
6035 // ----------------------------------------------------------------------------
6036 // debugging
6037 
6038 #ifdef ASSERT
6039 
6040 // return true if class_name contains no '.' (internal format is '/')
6041 bool ClassFileParser::is_internal_format(Symbol* class_name) {
6042   if (class_name != NULL) {
6043     ResourceMark rm;
6044     char* name = class_name->as_C_string();
6045     return strchr(name, '.') == NULL;
6046   } else {
6047     return true;
6048   }
6049 }
6050 
6051 #endif
--- EOF ---