jdk8-mips64-public/hotspot: src/share/vm/classfile/classFileParser.cpp@5c599c419c1d (annotated)

src/share/vm/classfile/classFileParser.cpp@5c599c419c1d (annotated)

src/share/vm/classfile/classFileParser.cpp

Thu, 11 Jul 2013 12:59:03 -0400

author: hseigel
date: Thu, 11 Jul 2013 12:59:03 -0400
changeset 5869: 5c599c419c1d
parent 5237: f2110083203d
child 5873: 8f66130f7b5c
permissions: -rw-r--r--

8016256: Make finalization final
Summary: Add private methods to final methods check
Reviewed-by: coleenp, acorn, ahgross
Contributed-by: harold.seigel@oracle.com

 /*
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "classfile/classFileParser.hpp"
 #include "classfile/classLoader.hpp"
 #include "classfile/classLoaderData.hpp"
 #include "classfile/classLoaderData.inline.hpp"
 #include "classfile/defaultMethods.hpp"
 #include "classfile/genericSignatures.hpp"
 #include "classfile/javaClasses.hpp"
 #include "classfile/symbolTable.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "classfile/verificationType.hpp"
 #include "classfile/verifier.hpp"
 #include "classfile/vmSymbols.hpp"
 #include "memory/allocation.hpp"
 #include "memory/gcLocker.hpp"
 #include "memory/metadataFactory.hpp"
 #include "memory/oopFactory.hpp"
 #include "memory/referenceType.hpp"
 #include "memory/universe.inline.hpp"
 #include "oops/constantPool.hpp"
 #include "oops/fieldStreams.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/instanceMirrorKlass.hpp"
 #include "oops/klass.inline.hpp"
 #include "oops/klassVtable.hpp"
 #include "oops/method.hpp"
 #include "oops/symbol.hpp"
 #include "prims/jvm.h"
 #include "prims/jvmtiExport.hpp"
 #include "prims/jvmtiThreadState.hpp"
 #include "runtime/javaCalls.hpp"
 #include "runtime/perfData.hpp"
 #include "runtime/reflection.hpp"
 #include "runtime/signature.hpp"
 #include "runtime/timer.hpp"
 #include "services/classLoadingService.hpp"
 #include "services/threadService.hpp"
 #include "utilities/array.hpp"
 #include "utilities/globalDefinitions.hpp"
 // We generally try to create the oops directly when parsing, rather than
 // allocating temporary data structures and copying the bytes twice. A
 // temporary area is only needed when parsing utf8 entries in the constant
 // pool and when parsing line number tables.
 // We add assert in debug mode when class format is not checked.
 #define JAVA_CLASSFILE_MAGIC              0xCAFEBABE
 #define JAVA_MIN_SUPPORTED_VERSION        45
 #define JAVA_MAX_SUPPORTED_VERSION        52
 #define JAVA_MAX_SUPPORTED_MINOR_VERSION  0
 // Used for two backward compatibility reasons:
 // - to check for new additions to the class file format in JDK1.5
 // - to check for bug fixes in the format checker in JDK1.5
 #define JAVA_1_5_VERSION                  49
 // Used for backward compatibility reasons:
 // - to check for javac bug fixes that happened after 1.5
 // - also used as the max version when running in jdk6
 #define JAVA_6_VERSION                    50
 // Used for backward compatibility reasons:
 // - to check NameAndType_info signatures more aggressively
 #define JAVA_7_VERSION                    51
 // Extension method support.
 #define JAVA_8_VERSION                    52
 void ClassFileParser::parse_constant_pool_entries(int length, TRAPS) {
   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
   // this function (_current can be allocated in a register, with scalar
   // replacement of aggregates). The _current pointer is copied back to
   // stream() when this function returns. DON'T call another method within
   // this method that uses stream().
   ClassFileStream* cfs0 = stream();
   ClassFileStream cfs1 = *cfs0;
   ClassFileStream* cfs = &cfs1;
 #ifdef ASSERT
   assert(cfs->allocated_on_stack(),"should be local");
   u1* old_current = cfs0->current();
 #endif
   Handle class_loader(THREAD, _loader_data->class_loader());
   // Used for batching symbol allocations.
   const char* names[SymbolTable::symbol_alloc_batch_size];
   int lengths[SymbolTable::symbol_alloc_batch_size];
   int indices[SymbolTable::symbol_alloc_batch_size];
   unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
   int names_count = 0;
   // parsing  Index 0 is unused
   for (int index = 1; index < length; index++) {
     // Each of the following case guarantees one more byte in the stream
     // for the following tag or the access_flags following constant pool,
     // so we don't need bounds-check for reading tag.
     u1 tag = cfs->get_u1_fast();
     switch (tag) {
       case JVM_CONSTANT_Class :
         {
           cfs->guarantee_more(3, CHECK);  // name_index, tag/access_flags
           u2 name_index = cfs->get_u2_fast();
           _cp->klass_index_at_put(index, name_index);
         }
         break;
       case JVM_CONSTANT_Fieldref :
         {
           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
           u2 class_index = cfs->get_u2_fast();
           u2 name_and_type_index = cfs->get_u2_fast();
           _cp->field_at_put(index, class_index, name_and_type_index);
         }
         break;
       case JVM_CONSTANT_Methodref :
         {
           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
           u2 class_index = cfs->get_u2_fast();
           u2 name_and_type_index = cfs->get_u2_fast();
           _cp->method_at_put(index, class_index, name_and_type_index);
         }
         break;
       case JVM_CONSTANT_InterfaceMethodref :
         {
           cfs->guarantee_more(5, CHECK);  // class_index, name_and_type_index, tag/access_flags
           u2 class_index = cfs->get_u2_fast();
           u2 name_and_type_index = cfs->get_u2_fast();
           _cp->interface_method_at_put(index, class_index, name_and_type_index);
         }
         break;
       case JVM_CONSTANT_String :
         {
           cfs->guarantee_more(3, CHECK);  // string_index, tag/access_flags
           u2 string_index = cfs->get_u2_fast();
           _cp->string_index_at_put(index, string_index);
         }
         break;
       case JVM_CONSTANT_MethodHandle :
       case JVM_CONSTANT_MethodType :
         if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
           classfile_parse_error(
             "Class file version does not support constant tag %u in class file %s",
             tag, CHECK);
         }
         if (!EnableInvokeDynamic) {
           classfile_parse_error(
             "This JVM does not support constant tag %u in class file %s",
             tag, CHECK);
         }
         if (tag == JVM_CONSTANT_MethodHandle) {
           cfs->guarantee_more(4, CHECK);  // ref_kind, method_index, tag/access_flags
           u1 ref_kind = cfs->get_u1_fast();
           u2 method_index = cfs->get_u2_fast();
           _cp->method_handle_index_at_put(index, ref_kind, method_index);
         } else if (tag == JVM_CONSTANT_MethodType) {
           cfs->guarantee_more(3, CHECK);  // signature_index, tag/access_flags
           u2 signature_index = cfs->get_u2_fast();
           _cp->method_type_index_at_put(index, signature_index);
         } else {
           ShouldNotReachHere();
         }
         break;
       case JVM_CONSTANT_InvokeDynamic :
         {
           if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
             classfile_parse_error(
               "Class file version does not support constant tag %u in class file %s",
               tag, CHECK);
           }
           if (!EnableInvokeDynamic) {
             classfile_parse_error(
               "This JVM does not support constant tag %u in class file %s",
               tag, CHECK);
           }
           cfs->guarantee_more(5, CHECK);  // bsm_index, nt, tag/access_flags
           u2 bootstrap_specifier_index = cfs->get_u2_fast();
           u2 name_and_type_index = cfs->get_u2_fast();
           if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
             _max_bootstrap_specifier_index = (int) bootstrap_specifier_index;  // collect for later
           _cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index);
         }
         break;
       case JVM_CONSTANT_Integer :
         {
           cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
           u4 bytes = cfs->get_u4_fast();
           _cp->int_at_put(index, (jint) bytes);
         }
         break;
       case JVM_CONSTANT_Float :
         {
           cfs->guarantee_more(5, CHECK);  // bytes, tag/access_flags
           u4 bytes = cfs->get_u4_fast();
           _cp->float_at_put(index, *(jfloat*)&bytes);
         }
         break;
       case JVM_CONSTANT_Long :
         // A mangled type might cause you to overrun allocated memory
         guarantee_property(index+1 < length,
                            "Invalid constant pool entry %u in class file %s",
                            index, CHECK);
         {
           cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
           u8 bytes = cfs->get_u8_fast();
           _cp->long_at_put(index, bytes);
         }
         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
         break;
       case JVM_CONSTANT_Double :
         // A mangled type might cause you to overrun allocated memory
         guarantee_property(index+1 < length,
                            "Invalid constant pool entry %u in class file %s",
                            index, CHECK);
         {
           cfs->guarantee_more(9, CHECK);  // bytes, tag/access_flags
           u8 bytes = cfs->get_u8_fast();
           _cp->double_at_put(index, *(jdouble*)&bytes);
         }
         index++;   // Skip entry following eigth-byte constant, see JVM book p. 98
         break;
       case JVM_CONSTANT_NameAndType :
         {
           cfs->guarantee_more(5, CHECK);  // name_index, signature_index, tag/access_flags
           u2 name_index = cfs->get_u2_fast();
           u2 signature_index = cfs->get_u2_fast();
           _cp->name_and_type_at_put(index, name_index, signature_index);
         }
         break;
       case JVM_CONSTANT_Utf8 :
         {
           cfs->guarantee_more(2, CHECK);  // utf8_length
           u2  utf8_length = cfs->get_u2_fast();
           u1* utf8_buffer = cfs->get_u1_buffer();
           assert(utf8_buffer != NULL, "null utf8 buffer");
           // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
           cfs->guarantee_more(utf8_length+1, CHECK);  // utf8 string, tag/access_flags
           cfs->skip_u1_fast(utf8_length);
           // Before storing the symbol, make sure it's legal
           if (_need_verify) {
             verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
           }
           if (EnableInvokeDynamic && has_cp_patch_at(index)) {
             Handle patch = clear_cp_patch_at(index);
             guarantee_property(java_lang_String::is_instance(patch()),
                                "Illegal utf8 patch at %d in class file %s",
                                index, CHECK);
             char* str = java_lang_String::as_utf8_string(patch());
             // (could use java_lang_String::as_symbol instead, but might as well batch them)
             utf8_buffer = (u1*) str;
             utf8_length = (int) strlen(str);
           }
           unsigned int hash;
           Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
           if (result == NULL) {
             names[names_count] = (char*)utf8_buffer;
             lengths[names_count] = utf8_length;
             indices[names_count] = index;
             hashValues[names_count++] = hash;
             if (names_count == SymbolTable::symbol_alloc_batch_size) {
               SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK);
               names_count = 0;
             }
           } else {
             _cp->symbol_at_put(index, result);
           }
         }
         break;
       default:
         classfile_parse_error(
           "Unknown constant tag %u in class file %s", tag, CHECK);
         break;
     }
   }
   // Allocate the remaining symbols
   if (names_count > 0) {
     SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK);
   }
   // Copy _current pointer of local copy back to stream().
 #ifdef ASSERT
   assert(cfs0->current() == old_current, "non-exclusive use of stream()");
 #endif
   cfs0->set_current(cfs1.current());
 }
 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
 inline Symbol* check_symbol_at(constantPoolHandle cp, int index) {
   if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8())
     return cp->symbol_at(index);
   else
     return NULL;
 }
 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
   ClassFileStream* cfs = stream();
   constantPoolHandle nullHandle;
   cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
   u2 length = cfs->get_u2_fast();
   guarantee_property(
     length >= 1, "Illegal constant pool size %u in class file %s",
     length, CHECK_(nullHandle));
   ConstantPool* constant_pool = ConstantPool::allocate(_loader_data, length,
                                                         CHECK_(nullHandle));
   _cp = constant_pool; // save in case of errors
   constantPoolHandle cp (THREAD, constant_pool);
   // parsing constant pool entries
   parse_constant_pool_entries(length, CHECK_(nullHandle));
   int index = 1;  // declared outside of loops for portability
   // first verification pass - validate cross references and fixup class and string constants
   for (index = 1; index < length; index++) {          // Index 0 is unused
     jbyte tag = cp->tag_at(index).value();
     switch (tag) {
       case JVM_CONSTANT_Class :
         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
         break;
       case JVM_CONSTANT_Fieldref :
         // fall through
       case JVM_CONSTANT_Methodref :
         // fall through
       case JVM_CONSTANT_InterfaceMethodref : {
         if (!_need_verify) break;
         int klass_ref_index = cp->klass_ref_index_at(index);
         int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
         check_property(valid_klass_reference_at(klass_ref_index),
                        "Invalid constant pool index %u in class file %s",
                        klass_ref_index,
                        CHECK_(nullHandle));
         check_property(valid_cp_range(name_and_type_ref_index, length) &&
                        cp->tag_at(name_and_type_ref_index).is_name_and_type(),
                        "Invalid constant pool index %u in class file %s",
                        name_and_type_ref_index,
                        CHECK_(nullHandle));
         break;
       }
       case JVM_CONSTANT_String :
         ShouldNotReachHere();     // Only JVM_CONSTANT_StringIndex should be present
         break;
       case JVM_CONSTANT_Integer :
         break;
       case JVM_CONSTANT_Float :
         break;
       case JVM_CONSTANT_Long :
       case JVM_CONSTANT_Double :
         index++;
         check_property(
           (index < length && cp->tag_at(index).is_invalid()),
           "Improper constant pool long/double index %u in class file %s",
           index, CHECK_(nullHandle));
         break;
       case JVM_CONSTANT_NameAndType : {
         if (!_need_verify) break;
         int name_ref_index = cp->name_ref_index_at(index);
         int signature_ref_index = cp->signature_ref_index_at(index);
         check_property(valid_symbol_at(name_ref_index),
                  "Invalid constant pool index %u in class file %s",
                  name_ref_index, CHECK_(nullHandle));
         check_property(valid_symbol_at(signature_ref_index),
                  "Invalid constant pool index %u in class file %s",
                  signature_ref_index, CHECK_(nullHandle));
         break;
       }
       case JVM_CONSTANT_Utf8 :
         break;
       case JVM_CONSTANT_UnresolvedClass :         // fall-through
       case JVM_CONSTANT_UnresolvedClassInError:
         ShouldNotReachHere();     // Only JVM_CONSTANT_ClassIndex should be present
         break;
       case JVM_CONSTANT_ClassIndex :
         {
           int class_index = cp->klass_index_at(index);
           check_property(valid_symbol_at(class_index),
                  "Invalid constant pool index %u in class file %s",
                  class_index, CHECK_(nullHandle));
           cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
         }
         break;
       case JVM_CONSTANT_StringIndex :
         {
           int string_index = cp->string_index_at(index);
           check_property(valid_symbol_at(string_index),
                  "Invalid constant pool index %u in class file %s",
                  string_index, CHECK_(nullHandle));
           Symbol* sym = cp->symbol_at(string_index);
           cp->unresolved_string_at_put(index, sym);
         }
         break;
       case JVM_CONSTANT_MethodHandle :
         {
           int ref_index = cp->method_handle_index_at(index);
           check_property(
             valid_cp_range(ref_index, length) &&
                 EnableInvokeDynamic,
               "Invalid constant pool index %u in class file %s",
               ref_index, CHECK_(nullHandle));
           constantTag tag = cp->tag_at(ref_index);
           int ref_kind  = cp->method_handle_ref_kind_at(index);
           switch (ref_kind) {
           case JVM_REF_getField:
           case JVM_REF_getStatic:
           case JVM_REF_putField:
           case JVM_REF_putStatic:
             check_property(
               tag.is_field(),
               "Invalid constant pool index %u in class file %s (not a field)",
               ref_index, CHECK_(nullHandle));
             break;
           case JVM_REF_invokeVirtual:
           case JVM_REF_newInvokeSpecial:
             check_property(
               tag.is_method(),
               "Invalid constant pool index %u in class file %s (not a method)",
               ref_index, CHECK_(nullHandle));
             break;
           case JVM_REF_invokeStatic:
           case JVM_REF_invokeSpecial:
             check_property(tag.is_method() ||
                            ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
                "Invalid constant pool index %u in class file %s (not a method)",
                ref_index, CHECK_(nullHandle));
              break;
           case JVM_REF_invokeInterface:
             check_property(
               tag.is_interface_method(),
               "Invalid constant pool index %u in class file %s (not an interface method)",
               ref_index, CHECK_(nullHandle));
             break;
           default:
             classfile_parse_error(
               "Bad method handle kind at constant pool index %u in class file %s",
               index, CHECK_(nullHandle));
           }
           // Keep the ref_index unchanged.  It will be indirected at link-time.
         }
         break;
       case JVM_CONSTANT_MethodType :
         {
           int ref_index = cp->method_type_index_at(index);
           check_property(valid_symbol_at(ref_index) && EnableInvokeDynamic,
                  "Invalid constant pool index %u in class file %s",
                  ref_index, CHECK_(nullHandle));
         }
         break;
       case JVM_CONSTANT_InvokeDynamic :
         {
           int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
           check_property(valid_cp_range(name_and_type_ref_index, length) &&
                          cp->tag_at(name_and_type_ref_index).is_name_and_type(),
                          "Invalid constant pool index %u in class file %s",
                          name_and_type_ref_index,
                          CHECK_(nullHandle));
           // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
           break;
         }
       default:
         fatal(err_msg("bad constant pool tag value %u",
                       cp->tag_at(index).value()));
         ShouldNotReachHere();
         break;
     } // end of switch
   } // end of for
   if (_cp_patches != NULL) {
     // need to treat this_class specially...
     assert(EnableInvokeDynamic, "");
     int this_class_index;
     {
       cfs->guarantee_more(8, CHECK_(nullHandle));  // flags, this_class, super_class, infs_len
       u1* mark = cfs->current();
       u2 flags         = cfs->get_u2_fast();
       this_class_index = cfs->get_u2_fast();
       cfs->set_current(mark);  // revert to mark
     }
     for (index = 1; index < length; index++) {          // Index 0 is unused
       if (has_cp_patch_at(index)) {
         guarantee_property(index != this_class_index,
                            "Illegal constant pool patch to self at %d in class file %s",
                            index, CHECK_(nullHandle));
         patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
       }
     }
   }
   if (!_need_verify) {
     return cp;
   }
   // second verification pass - checks the strings are of the right format.
   // but not yet to the other entries
   for (index = 1; index < length; index++) {
     jbyte tag = cp->tag_at(index).value();
     switch (tag) {
       case JVM_CONSTANT_UnresolvedClass: {
         Symbol*  class_name = cp->unresolved_klass_at(index);
         // check the name, even if _cp_patches will overwrite it
         verify_legal_class_name(class_name, CHECK_(nullHandle));
         break;
       }
       case JVM_CONSTANT_NameAndType: {
         if (_need_verify && _major_version >= JAVA_7_VERSION) {
           int sig_index = cp->signature_ref_index_at(index);
           int name_index = cp->name_ref_index_at(index);
           Symbol*  name = cp->symbol_at(name_index);
           Symbol*  sig = cp->symbol_at(sig_index);
           if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
             verify_legal_method_signature(name, sig, CHECK_(nullHandle));
           } else {
             verify_legal_field_signature(name, sig, CHECK_(nullHandle));
           }
         }
         break;
       }
       case JVM_CONSTANT_InvokeDynamic:
       case JVM_CONSTANT_Fieldref:
       case JVM_CONSTANT_Methodref:
       case JVM_CONSTANT_InterfaceMethodref: {
         int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
         // already verified to be utf8
         int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
         // already verified to be utf8
         int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
         Symbol*  name = cp->symbol_at(name_ref_index);
         Symbol*  signature = cp->symbol_at(signature_ref_index);
         if (tag == JVM_CONSTANT_Fieldref) {
           verify_legal_field_name(name, CHECK_(nullHandle));
           if (_need_verify && _major_version >= JAVA_7_VERSION) {
             // Signature is verified above, when iterating NameAndType_info.
             // Need only to be sure it's the right type.
             if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
               throwIllegalSignature(
                   "Field", name, signature, CHECK_(nullHandle));
             }
           } else {
             verify_legal_field_signature(name, signature, CHECK_(nullHandle));
           }
         } else {
           verify_legal_method_name(name, CHECK_(nullHandle));
           if (_need_verify && _major_version >= JAVA_7_VERSION) {
             // Signature is verified above, when iterating NameAndType_info.
             // Need only to be sure it's the right type.
             if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
               throwIllegalSignature(
                   "Method", name, signature, CHECK_(nullHandle));
             }
           } else {
             verify_legal_method_signature(name, signature, CHECK_(nullHandle));
           }
           if (tag == JVM_CONSTANT_Methodref) {
             // 4509014: If a class method name begins with '<', it must be "<init>".
             assert(name != NULL, "method name in constant pool is null");
             unsigned int name_len = name->utf8_length();
             assert(name_len > 0, "bad method name");  // already verified as legal name
             if (name->byte_at(0) == '<') {
               if (name != vmSymbols::object_initializer_name()) {
                 classfile_parse_error(
                   "Bad method name at constant pool index %u in class file %s",
                   name_ref_index, CHECK_(nullHandle));
               }
             }
           }
         }
         break;
       }
       case JVM_CONSTANT_MethodHandle: {
         int ref_index = cp->method_handle_index_at(index);
         int ref_kind  = cp->method_handle_ref_kind_at(index);
         switch (ref_kind) {
         case JVM_REF_invokeVirtual:
         case JVM_REF_invokeStatic:
         case JVM_REF_invokeSpecial:
         case JVM_REF_newInvokeSpecial:
           {
             int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
             int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
             Symbol*  name = cp->symbol_at(name_ref_index);
             if (ref_kind == JVM_REF_newInvokeSpecial) {
               if (name != vmSymbols::object_initializer_name()) {
                 classfile_parse_error(
                   "Bad constructor name at constant pool index %u in class file %s",
                   name_ref_index, CHECK_(nullHandle));
               }
             } else {
               if (name == vmSymbols::object_initializer_name()) {
                 classfile_parse_error(
                   "Bad method name at constant pool index %u in class file %s",
                   name_ref_index, CHECK_(nullHandle));
               }
             }
           }
           break;
           // Other ref_kinds are already fully checked in previous pass.
         }
         break;
       }
       case JVM_CONSTANT_MethodType: {
         Symbol* no_name = vmSymbols::type_name(); // place holder
         Symbol*  signature = cp->method_type_signature_at(index);
         verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
         break;
       }
       case JVM_CONSTANT_Utf8: {
         assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
       }
     }  // end of switch
   }  // end of for
   return cp;
 }
 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
   assert(EnableInvokeDynamic, "");
   BasicType patch_type = T_VOID;
   switch (cp->tag_at(index).value()) {
   case JVM_CONSTANT_UnresolvedClass :
     // Patching a class means pre-resolving it.
     // The name in the constant pool is ignored.
     if (java_lang_Class::is_instance(patch())) {
       guarantee_property(!java_lang_Class::is_primitive(patch()),
                          "Illegal class patch at %d in class file %s",
                          index, CHECK);
       cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
     } else {
       guarantee_property(java_lang_String::is_instance(patch()),
                          "Illegal class patch at %d in class file %s",
                          index, CHECK);
       Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
       cp->unresolved_klass_at_put(index, name);
     }
     break;
   case JVM_CONSTANT_String :
     // skip this patch and don't clear it.  Needs the oop array for resolved
     // references to be created first.
     return;
   case JVM_CONSTANT_Integer : patch_type = T_INT;    goto patch_prim;
   case JVM_CONSTANT_Float :   patch_type = T_FLOAT;  goto patch_prim;
   case JVM_CONSTANT_Long :    patch_type = T_LONG;   goto patch_prim;
   case JVM_CONSTANT_Double :  patch_type = T_DOUBLE; goto patch_prim;
   patch_prim:
     {
       jvalue value;
       BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
       guarantee_property(value_type == patch_type,
                          "Illegal primitive patch at %d in class file %s",
                          index, CHECK);
       switch (value_type) {
       case T_INT:    cp->int_at_put(index,   value.i); break;
       case T_FLOAT:  cp->float_at_put(index, value.f); break;
       case T_LONG:   cp->long_at_put(index,  value.j); break;
       case T_DOUBLE: cp->double_at_put(index, value.d); break;
       default:       assert(false, "");
       }
     }
     break;
   default:
     // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
     guarantee_property(!has_cp_patch_at(index),
                        "Illegal unexpected patch at %d in class file %s",
                        index, CHECK);
     return;
   }
   // On fall-through, mark the patch as used.
   clear_cp_patch_at(index);
 }
 class NameSigHash: public ResourceObj {
  public:
   Symbol*       _name;       // name
   Symbol*       _sig;        // signature
   NameSigHash*  _next;       // Next entry in hash table
 };
 #define HASH_ROW_SIZE 256
 unsigned int hash(Symbol* name, Symbol* sig) {
   unsigned int raw_hash = 0;
   raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
   raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
   return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
 }
 void initialize_hashtable(NameSigHash** table) {
   memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
 }
 // Return false if the name/sig combination is found in table.
 // Return true if no duplicate is found. And name/sig is added as a new entry in table.
 // The old format checker uses heap sort to find duplicates.
 // NOTE: caller should guarantee that GC doesn't happen during the life cycle
 // of table since we don't expect Symbol*'s to move.
 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) {
   assert(name != NULL, "name in constant pool is NULL");
   // First lookup for duplicates
   int index = hash(name, sig);
   NameSigHash* entry = table[index];
   while (entry != NULL) {
     if (entry->_name == name && entry->_sig == sig) {
       return false;
     }
     entry = entry->_next;
   }
   // No duplicate is found, allocate a new entry and fill it.
   entry = new NameSigHash();
   entry->_name = name;
   entry->_sig = sig;
   // Insert into hash table
   entry->_next = table[index];
   table[index] = entry;
   return true;
 }
 Array<Klass*>* ClassFileParser::parse_interfaces(int length,
                                                  Handle protection_domain,
                                                  Symbol* class_name,
                                                  bool* has_default_methods,
                                                  TRAPS) {
   if (length == 0) {
     _local_interfaces = Universe::the_empty_klass_array();
   } else {
     ClassFileStream* cfs = stream();
     assert(length > 0, "only called for length>0");
     _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, length, NULL, CHECK_NULL);
     int index;
     for (index = 0; index < length; index++) {
       u2 interface_index = cfs->get_u2(CHECK_NULL);
       KlassHandle interf;
       check_property(
         valid_klass_reference_at(interface_index),
         "Interface name has bad constant pool index %u in class file %s",
         interface_index, CHECK_NULL);
       if (_cp->tag_at(interface_index).is_klass()) {
         interf = KlassHandle(THREAD, _cp->resolved_klass_at(interface_index));
       } else {
         Symbol*  unresolved_klass  = _cp->klass_name_at(interface_index);
         // Don't need to check legal name because it's checked when parsing constant pool.
         // But need to make sure it's not an array type.
         guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
                            "Bad interface name in class file %s", CHECK_NULL);
         Handle class_loader(THREAD, _loader_data->class_loader());
         // Call resolve_super so classcircularity is checked
         Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
                       unresolved_klass, class_loader, protection_domain,
                       false, CHECK_NULL);
         interf = KlassHandle(THREAD, k);
       }
       if (!interf()->is_interface()) {
         THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL);
       }
       if (InstanceKlass::cast(interf())->has_default_methods()) {
         *has_default_methods = true;
       }
       _local_interfaces->at_put(index, interf());
     }
     if (!_need_verify || length <= 1) {
       return _local_interfaces;
     }
     // Check if there's any duplicates in interfaces
     ResourceMark rm(THREAD);
     NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
       THREAD, NameSigHash*, HASH_ROW_SIZE);
     initialize_hashtable(interface_names);
     bool dup = false;
     {
       debug_only(No_Safepoint_Verifier nsv;)
       for (index = 0; index < length; index++) {
         Klass* k = _local_interfaces->at(index);
         Symbol* name = InstanceKlass::cast(k)->name();
         // If no duplicates, add (name, NULL) in hashtable interface_names.
         if (!put_after_lookup(name, NULL, interface_names)) {
           dup = true;
           break;
         }
       }
     }
     if (dup) {
       classfile_parse_error("Duplicate interface name in class file %s", CHECK_NULL);
     }
   }
   return _local_interfaces;
 }
 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, TRAPS) {
   // Make sure the constant pool entry is of a type appropriate to this field
   guarantee_property(
     (constantvalue_index > 0 &&
       constantvalue_index < _cp->length()),
     "Bad initial value index %u in ConstantValue attribute in class file %s",
     constantvalue_index, CHECK);
   constantTag value_type = _cp->tag_at(constantvalue_index);
   switch ( _cp->basic_type_for_signature_at(signature_index) ) {
     case T_LONG:
       guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
       break;
     case T_FLOAT:
       guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
       break;
     case T_DOUBLE:
       guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
       break;
     case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
       guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
       break;
     case T_OBJECT:
       guarantee_property((_cp->symbol_at(signature_index)->equals("Ljava/lang/String;")
                          && value_type.is_string()),
                          "Bad string initial value in class file %s", CHECK);
       break;
     default:
       classfile_parse_error(
         "Unable to set initial value %u in class file %s",
         constantvalue_index, CHECK);
   }
 }
 // Parse attributes for a field.
 void ClassFileParser::parse_field_attributes(u2 attributes_count,
                                              bool is_static, u2 signature_index,
                                              u2* constantvalue_index_addr,
                                              bool* is_synthetic_addr,
                                              u2* generic_signature_index_addr,
                                              ClassFileParser::FieldAnnotationCollector* parsed_annotations,
                                              TRAPS) {
   ClassFileStream* cfs = stream();
   assert(attributes_count > 0, "length should be greater than 0");
   u2 constantvalue_index = 0;
   u2 generic_signature_index = 0;
   bool is_synthetic = false;
   u1* runtime_visible_annotations = NULL;
   int runtime_visible_annotations_length = 0;
   u1* runtime_invisible_annotations = NULL;
   int runtime_invisible_annotations_length = 0;
   u1* runtime_visible_type_annotations = NULL;
   int runtime_visible_type_annotations_length = 0;
   u1* runtime_invisible_type_annotations = NULL;
   int runtime_invisible_type_annotations_length = 0;
   while (attributes_count--) {
     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
     u2 attribute_name_index = cfs->get_u2_fast();
     u4 attribute_length = cfs->get_u4_fast();
     check_property(valid_symbol_at(attribute_name_index),
                    "Invalid field attribute index %u in class file %s",
                    attribute_name_index,
                    CHECK);
     Symbol* attribute_name = _cp->symbol_at(attribute_name_index);
     if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
       // ignore if non-static
       if (constantvalue_index != 0) {
         classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
       }
       check_property(
         attribute_length == 2,
         "Invalid ConstantValue field attribute length %u in class file %s",
         attribute_length, CHECK);
       constantvalue_index = cfs->get_u2(CHECK);
       if (_need_verify) {
         verify_constantvalue(constantvalue_index, signature_index, CHECK);
       }
     } else if (attribute_name == vmSymbols::tag_synthetic()) {
       if (attribute_length != 0) {
         classfile_parse_error(
           "Invalid Synthetic field attribute length %u in class file %s",
           attribute_length, CHECK);
       }
       is_synthetic = true;
     } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
       if (attribute_length != 0) {
         classfile_parse_error(
           "Invalid Deprecated field attribute length %u in class file %s",
           attribute_length, CHECK);
       }
     } else if (_major_version >= JAVA_1_5_VERSION) {
       if (attribute_name == vmSymbols::tag_signature()) {
         if (attribute_length != 2) {
           classfile_parse_error(
             "Wrong size %u for field's Signature attribute in class file %s",
             attribute_length, CHECK);
         }
         generic_signature_index = cfs->get_u2(CHECK);
       } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
         runtime_visible_annotations_length = attribute_length;
         runtime_visible_annotations = cfs->get_u1_buffer();
         assert(runtime_visible_annotations != NULL, "null visible annotations");
         parse_annotations(runtime_visible_annotations,
                           runtime_visible_annotations_length,
                           parsed_annotations,
                           CHECK);
         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
       } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
         runtime_invisible_annotations_length = attribute_length;
         runtime_invisible_annotations = cfs->get_u1_buffer();
         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
         cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
       } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
         runtime_visible_type_annotations_length = attribute_length;
         runtime_visible_type_annotations = cfs->get_u1_buffer();
         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
       } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
         runtime_invisible_type_annotations_length = attribute_length;
         runtime_invisible_type_annotations = cfs->get_u1_buffer();
         assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
         cfs->skip_u1(runtime_invisible_type_annotations_length, CHECK);
       } else {
         cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
       }
     } else {
       cfs->skip_u1(attribute_length, CHECK);  // Skip unknown attributes
     }
   }
   *constantvalue_index_addr = constantvalue_index;
   *is_synthetic_addr = is_synthetic;
   *generic_signature_index_addr = generic_signature_index;
   AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
                                             runtime_visible_annotations_length,
                                             runtime_invisible_annotations,
                                             runtime_invisible_annotations_length,
                                             CHECK);
   parsed_annotations->set_field_annotations(a);
   a = assemble_annotations(runtime_visible_type_annotations,
                            runtime_visible_type_annotations_length,
                            runtime_invisible_type_annotations,
                            runtime_invisible_type_annotations_length,
                            CHECK);
   parsed_annotations->set_field_type_annotations(a);
   return;
 }
 // Field allocation types. Used for computing field offsets.
 enum FieldAllocationType {
   STATIC_OOP,           // Oops
   STATIC_BYTE,          // Boolean, Byte, char
   STATIC_SHORT,         // shorts
   STATIC_WORD,          // ints
   STATIC_DOUBLE,        // aligned long or double
   NONSTATIC_OOP,
   NONSTATIC_BYTE,
   NONSTATIC_SHORT,
   NONSTATIC_WORD,
   NONSTATIC_DOUBLE,
   MAX_FIELD_ALLOCATION_TYPE,
   BAD_ALLOCATION_TYPE = -1
 };
 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
   BAD_ALLOCATION_TYPE, // 0
   BAD_ALLOCATION_TYPE, // 1
   BAD_ALLOCATION_TYPE, // 2
   BAD_ALLOCATION_TYPE, // 3
   NONSTATIC_BYTE ,     // T_BOOLEAN     =  4,
   NONSTATIC_SHORT,     // T_CHAR        =  5,
   NONSTATIC_WORD,      // T_FLOAT       =  6,
   NONSTATIC_DOUBLE,    // T_DOUBLE      =  7,
   NONSTATIC_BYTE,      // T_BYTE        =  8,
   NONSTATIC_SHORT,     // T_SHORT       =  9,
   NONSTATIC_WORD,      // T_INT         = 10,
   NONSTATIC_DOUBLE,    // T_LONG        = 11,
   NONSTATIC_OOP,       // T_OBJECT      = 12,
   NONSTATIC_OOP,       // T_ARRAY       = 13,
   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
   BAD_ALLOCATION_TYPE, // 0
   BAD_ALLOCATION_TYPE, // 1
   BAD_ALLOCATION_TYPE, // 2
   BAD_ALLOCATION_TYPE, // 3
   STATIC_BYTE ,        // T_BOOLEAN     =  4,
   STATIC_SHORT,        // T_CHAR        =  5,
   STATIC_WORD,         // T_FLOAT       =  6,
   STATIC_DOUBLE,       // T_DOUBLE      =  7,
   STATIC_BYTE,         // T_BYTE        =  8,
   STATIC_SHORT,        // T_SHORT       =  9,
   STATIC_WORD,         // T_INT         = 10,
   STATIC_DOUBLE,       // T_LONG        = 11,
   STATIC_OOP,          // T_OBJECT      = 12,
   STATIC_OOP,          // T_ARRAY       = 13,
   BAD_ALLOCATION_TYPE, // T_VOID        = 14,
   BAD_ALLOCATION_TYPE, // T_ADDRESS     = 15,
   BAD_ALLOCATION_TYPE, // T_NARROWOOP   = 16,
   BAD_ALLOCATION_TYPE, // T_METADATA    = 17,
   BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
   BAD_ALLOCATION_TYPE, // T_CONFLICT    = 19,
 };
 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
   assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
   FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
   assert(result != BAD_ALLOCATION_TYPE, "bad type");
   return result;
 }
 class FieldAllocationCount: public ResourceObj {
  public:
   u2 count[MAX_FIELD_ALLOCATION_TYPE];
   FieldAllocationCount() {
     for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
       count[i] = 0;
     }
   }
   FieldAllocationType update(bool is_static, BasicType type) {
     FieldAllocationType atype = basic_type_to_atype(is_static, type);
     // Make sure there is no overflow with injected fields.
     assert(count[atype] < 0xFFFF, "More than 65535 fields");
     count[atype]++;
     return atype;
   }
 };
 Array<u2>* ClassFileParser::parse_fields(Symbol* class_name,
                                          bool is_interface,
                                          FieldAllocationCount *fac,
                                          u2* java_fields_count_ptr, TRAPS) {
   ClassFileStream* cfs = stream();
   cfs->guarantee_more(2, CHECK_NULL);  // length
   u2 length = cfs->get_u2_fast();
   *java_fields_count_ptr = length;
   int num_injected = 0;
   InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
   int total_fields = length + num_injected;
   // The field array starts with tuples of shorts
   // [access, name index, sig index, initial value index, byte offset].
   // A generic signature slot only exists for field with generic
   // signature attribute. And the access flag is set with
   // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
   // signature slots are at the end of the field array and after all
   // other fields data.
   //
   //   f1: [access, name index, sig index, initial value index, low_offset, high_offset]
   //   f2: [access, name index, sig index, initial value index, low_offset, high_offset]
   //       ...
   //   fn: [access, name index, sig index, initial value index, low_offset, high_offset]
   //       [generic signature index]
   //       [generic signature index]
   //       ...
   //
   // Allocate a temporary resource array for field data. For each field,
   // a slot is reserved in the temporary array for the generic signature
   // index. After parsing all fields, the data are copied to a permanent
   // array and any unused slots will be discarded.
   ResourceMark rm(THREAD);
   u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
              THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
   // The generic signature slots start after all other fields' data.
   int generic_signature_slot = total_fields * FieldInfo::field_slots;
   int num_generic_signature = 0;
   for (int n = 0; n < length; n++) {
     cfs->guarantee_more(8, CHECK_NULL);  // access_flags, name_index, descriptor_index, attributes_count
     AccessFlags access_flags;
     jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
     verify_legal_field_modifiers(flags, is_interface, CHECK_NULL);
     access_flags.set_flags(flags);
     u2 name_index = cfs->get_u2_fast();
     int cp_size = _cp->length();
     check_property(valid_symbol_at(name_index),
       "Invalid constant pool index %u for field name in class file %s",
       name_index,
       CHECK_NULL);
     Symbol*  name = _cp->symbol_at(name_index);
     verify_legal_field_name(name, CHECK_NULL);
     u2 signature_index = cfs->get_u2_fast();
     check_property(valid_symbol_at(signature_index),
       "Invalid constant pool index %u for field signature in class file %s",
       signature_index, CHECK_NULL);
     Symbol*  sig = _cp->symbol_at(signature_index);
     verify_legal_field_signature(name, sig, CHECK_NULL);
     u2 constantvalue_index = 0;
     bool is_synthetic = false;
     u2 generic_signature_index = 0;
     bool is_static = access_flags.is_static();
     FieldAnnotationCollector parsed_annotations(_loader_data);
     u2 attributes_count = cfs->get_u2_fast();
     if (attributes_count > 0) {
       parse_field_attributes(attributes_count, is_static, signature_index,
                              &constantvalue_index, &is_synthetic,
                              &generic_signature_index, &parsed_annotations,
                              CHECK_NULL);
       if (parsed_annotations.field_annotations() != NULL) {
         if (_fields_annotations == NULL) {
           _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
                                              _loader_data, length, NULL,
                                              CHECK_NULL);
         }
         _fields_annotations->at_put(n, parsed_annotations.field_annotations());
         parsed_annotations.set_field_annotations(NULL);
       }
       if (parsed_annotations.field_type_annotations() != NULL) {
         if (_fields_type_annotations == NULL) {
           _fields_type_annotations = MetadataFactory::new_array<AnnotationArray*>(
                                                   _loader_data, length, NULL,
                                                   CHECK_NULL);
         }
         _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
         parsed_annotations.set_field_type_annotations(NULL);
       }
       if (is_synthetic) {
         access_flags.set_is_synthetic();
       }
       if (generic_signature_index != 0) {
         access_flags.set_field_has_generic_signature();
         fa[generic_signature_slot] = generic_signature_index;
         generic_signature_slot ++;
         num_generic_signature ++;
       }
     }
     FieldInfo* field = FieldInfo::from_field_array(fa, n);
     field->initialize(access_flags.as_short(),
                       name_index,
                       signature_index,
                       constantvalue_index);
     BasicType type = _cp->basic_type_for_signature_at(signature_index);
     // Remember how many oops we encountered and compute allocation type
     FieldAllocationType atype = fac->update(is_static, type);
     field->set_allocation_type(atype);
     // After field is initialized with type, we can augment it with aux info
     if (parsed_annotations.has_any_annotations())
       parsed_annotations.apply_to(field);
   }
   int index = length;
   if (num_injected != 0) {
     for (int n = 0; n < num_injected; n++) {
       // Check for duplicates
       if (injected[n].may_be_java) {
         Symbol* name      = injected[n].name();
         Symbol* signature = injected[n].signature();
         bool duplicate = false;
         for (int i = 0; i < length; i++) {
           FieldInfo* f = FieldInfo::from_field_array(fa, i);
           if (name      == _cp->symbol_at(f->name_index()) &&
               signature == _cp->symbol_at(f->signature_index())) {
             // Symbol is desclared in Java so skip this one
             duplicate = true;
             break;
           }
         }
         if (duplicate) {
           // These will be removed from the field array at the end
           continue;
         }
       }
       // Injected field
       FieldInfo* field = FieldInfo::from_field_array(fa, index);
       field->initialize(JVM_ACC_FIELD_INTERNAL,
                         injected[n].name_index,
                         injected[n].signature_index,
 );
       BasicType type = FieldType::basic_type(injected[n].signature());
       // Remember how many oops we encountered and compute allocation type
       FieldAllocationType atype = fac->update(false, type);
       field->set_allocation_type(atype);
       index++;
     }
   }
   // Now copy the fields' data from the temporary resource array.
   // Sometimes injected fields already exist in the Java source so
   // the fields array could be too long.  In that case the
   // fields array is trimed. Also unused slots that were reserved
   // for generic signature indexes are discarded.
   Array<u2>* fields = MetadataFactory::new_array<u2>(
           _loader_data, index * FieldInfo::field_slots + num_generic_signature,
           CHECK_NULL);
   _fields = fields; // save in case of error
   {
     int i = 0;
     for (; i < index * FieldInfo::field_slots; i++) {
       fields->at_put(i, fa[i]);
     }
     for (int j = total_fields * FieldInfo::field_slots;
          j < generic_signature_slot; j++) {
       fields->at_put(i++, fa[j]);
     }
     assert(i == fields->length(), "");
   }
   if (_need_verify && length > 1) {
     // Check duplicated fields
     ResourceMark rm(THREAD);
     NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
       THREAD, NameSigHash*, HASH_ROW_SIZE);
     initialize_hashtable(names_and_sigs);
     bool dup = false;
     {
       debug_only(No_Safepoint_Verifier nsv;)
       for (AllFieldStream fs(fields, _cp); !fs.done(); fs.next()) {
         Symbol* name = fs.name();
         Symbol* sig = fs.signature();
         // If no duplicates, add name/signature in hashtable names_and_sigs.
         if (!put_after_lookup(name, sig, names_and_sigs)) {
           dup = true;
           break;
         }
       }
     }
     if (dup) {
       classfile_parse_error("Duplicate field name&signature in class file %s",
                             CHECK_NULL);
     }
   }
   return fields;
 }
 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
   while (length-- > 0) {
     *dest++ = Bytes::get_Java_u2((u1*) (src++));
   }
 }
 u2* ClassFileParser::parse_exception_table(u4 code_length,
                                            u4 exception_table_length,
                                            TRAPS) {
   ClassFileStream* cfs = stream();
   u2* exception_table_start = cfs->get_u2_buffer();
   assert(exception_table_start != NULL, "null exception table");
   cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
   // Will check legal target after parsing code array in verifier.
   if (_need_verify) {
     for (unsigned int i = 0; i < exception_table_length; i++) {
       u2 start_pc = cfs->get_u2_fast();
       u2 end_pc = cfs->get_u2_fast();
       u2 handler_pc = cfs->get_u2_fast();
       u2 catch_type_index = cfs->get_u2_fast();
       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
                          "Illegal exception table range in class file %s",
                          CHECK_NULL);
       guarantee_property(handler_pc < code_length,
                          "Illegal exception table handler in class file %s",
                          CHECK_NULL);
       if (catch_type_index != 0) {
         guarantee_property(valid_klass_reference_at(catch_type_index),
                            "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
       }
     }
   } else {
     cfs->skip_u2_fast(exception_table_length * 4);
   }
   return exception_table_start;
 }
 void ClassFileParser::parse_linenumber_table(
     u4 code_attribute_length, u4 code_length,
     CompressedLineNumberWriteStream** write_stream, TRAPS) {
   ClassFileStream* cfs = stream();
   unsigned int num_entries = cfs->get_u2(CHECK);
   // Each entry is a u2 start_pc, and a u2 line_number
   unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
   // Verify line number attribute and table length
   check_property(
     code_attribute_length == sizeof(u2) + length_in_bytes,
     "LineNumberTable attribute has wrong length in class file %s", CHECK);
   cfs->guarantee_more(length_in_bytes, CHECK);
   if ((*write_stream) == NULL) {
     if (length_in_bytes > fixed_buffer_size) {
       (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
     } else {
       (*write_stream) = new CompressedLineNumberWriteStream(
         linenumbertable_buffer, fixed_buffer_size);
     }
   }
   while (num_entries-- > 0) {
     u2 bci  = cfs->get_u2_fast(); // start_pc
     u2 line = cfs->get_u2_fast(); // line_number
     guarantee_property(bci < code_length,
         "Invalid pc in LineNumberTable in class file %s", CHECK);
     (*write_stream)->write_pair(bci, line);
   }
 }
 // Class file LocalVariableTable elements.
 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
  public:
   u2 start_bci;
   u2 length;
   u2 name_cp_index;
   u2 descriptor_cp_index;
   u2 slot;
 };
 class LVT_Hash: public CHeapObj<mtClass> {
  public:
   LocalVariableTableElement  *_elem;  // element
   LVT_Hash*                   _next;  // Next entry in hash table
 };
 unsigned int hash(LocalVariableTableElement *elem) {
   unsigned int raw_hash = elem->start_bci;
   raw_hash = elem->length        + raw_hash * 37;
   raw_hash = elem->name_cp_index + raw_hash * 37;
   raw_hash = elem->slot          + raw_hash * 37;
   return raw_hash % HASH_ROW_SIZE;
 }
 void initialize_hashtable(LVT_Hash** table) {
   for (int i = 0; i < HASH_ROW_SIZE; i++) {
     table[i] = NULL;
   }
 }
 void clear_hashtable(LVT_Hash** table) {
   for (int i = 0; i < HASH_ROW_SIZE; i++) {
     LVT_Hash* current = table[i];
     LVT_Hash* next;
     while (current != NULL) {
       next = current->_next;
       current->_next = NULL;
       delete(current);
       current = next;
     }
     table[i] = NULL;
   }
 }
 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
   LVT_Hash* entry = table[index];
   /*
    * 3-tuple start_bci/length/slot has to be unique key,
    * so the following comparison seems to be redundant:
    *       && elem->name_cp_index == entry->_elem->name_cp_index
    */
   while (entry != NULL) {
     if (elem->start_bci           == entry->_elem->start_bci
      && elem->length              == entry->_elem->length
      && elem->name_cp_index       == entry->_elem->name_cp_index
      && elem->slot                == entry->_elem->slot
     ) {
       return entry;
     }
     entry = entry->_next;
   }
   return NULL;
 }
 // Return false if the local variable is found in table.
 // Return true if no duplicate is found.
 // And local variable is added as a new entry in table.
 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
   // First lookup for duplicates
   int index = hash(elem);
   LVT_Hash* entry = LVT_lookup(elem, index, table);
   if (entry != NULL) {
       return false;
   }
   // No duplicate is found, allocate a new entry and fill it.
   if ((entry = new LVT_Hash()) == NULL) {
     return false;
   }
   entry->_elem = elem;
   // Insert into hash table
   entry->_next = table[index];
   table[index] = entry;
   return true;
 }
 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
   lvt->start_bci           = Bytes::get_Java_u2((u1*) &src->start_bci);
   lvt->length              = Bytes::get_Java_u2((u1*) &src->length);
   lvt->name_cp_index       = Bytes::get_Java_u2((u1*) &src->name_cp_index);
   lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
   lvt->signature_cp_index  = 0;
   lvt->slot                = Bytes::get_Java_u2((u1*) &src->slot);
 }
 // Function is used to parse both attributes:
 //       LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
 u2* ClassFileParser::parse_localvariable_table(u4 code_length,
                                                u2 max_locals,
                                                u4 code_attribute_length,
                                                u2* localvariable_table_length,
                                                bool isLVTT,
                                                TRAPS) {
   ClassFileStream* cfs = stream();
   const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
   *localvariable_table_length = cfs->get_u2(CHECK_NULL);
   unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
   // Verify local variable table attribute has right length
   if (_need_verify) {
     guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
                        "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
   }
   u2* localvariable_table_start = cfs->get_u2_buffer();
   assert(localvariable_table_start != NULL, "null local variable table");
   if (!_need_verify) {
     cfs->skip_u2_fast(size);
   } else {
     cfs->guarantee_more(size * 2, CHECK_NULL);
     for(int i = 0; i < (*localvariable_table_length); i++) {
       u2 start_pc = cfs->get_u2_fast();
       u2 length = cfs->get_u2_fast();
       u2 name_index = cfs->get_u2_fast();
       u2 descriptor_index = cfs->get_u2_fast();
       u2 index = cfs->get_u2_fast();
       // Assign to a u4 to avoid overflow
       u4 end_pc = (u4)start_pc + (u4)length;
       if (start_pc >= code_length) {
         classfile_parse_error(
           "Invalid start_pc %u in %s in class file %s",
           start_pc, tbl_name, CHECK_NULL);
       }
       if (end_pc > code_length) {
         classfile_parse_error(
           "Invalid length %u in %s in class file %s",
           length, tbl_name, CHECK_NULL);
       }
       int cp_size = _cp->length();
       guarantee_property(valid_symbol_at(name_index),
         "Name index %u in %s has bad constant type in class file %s",
         name_index, tbl_name, CHECK_NULL);
       guarantee_property(valid_symbol_at(descriptor_index),
         "Signature index %u in %s has bad constant type in class file %s",
         descriptor_index, tbl_name, CHECK_NULL);
       Symbol*  name = _cp->symbol_at(name_index);
       Symbol*  sig = _cp->symbol_at(descriptor_index);
       verify_legal_field_name(name, CHECK_NULL);
       u2 extra_slot = 0;
       if (!isLVTT) {
         verify_legal_field_signature(name, sig, CHECK_NULL);
         // 4894874: check special cases for double and long local variables
         if (sig == vmSymbols::type_signature(T_DOUBLE) ||
             sig == vmSymbols::type_signature(T_LONG)) {
           extra_slot = 1;
         }
       }
       guarantee_property((index + extra_slot) < max_locals,
                           "Invalid index %u in %s in class file %s",
                           index, tbl_name, CHECK_NULL);
     }
   }
   return localvariable_table_start;
 }
 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
                                       u1* u1_array, u2* u2_array, TRAPS) {
   ClassFileStream* cfs = stream();
   u2 index = 0; // index in the array with long/double occupying two slots
   u4 i1 = *u1_index;
   u4 i2 = *u2_index + 1;
   for(int i = 0; i < array_length; i++) {
     u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
     index++;
     if (tag == ITEM_Long || tag == ITEM_Double) {
       index++;
     } else if (tag == ITEM_Object) {
       u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
       guarantee_property(valid_klass_reference_at(class_index),
                          "Bad class index %u in StackMap in class file %s",
                          class_index, CHECK);
     } else if (tag == ITEM_Uninitialized) {
       u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
       guarantee_property(
         offset < code_length,
         "Bad uninitialized type offset %u in StackMap in class file %s",
         offset, CHECK);
     } else {
       guarantee_property(
         tag <= (u1)ITEM_Uninitialized,
         "Unknown variable type %u in StackMap in class file %s",
         tag, CHECK);
     }
   }
   u2_array[*u2_index] = index;
   *u1_index = i1;
   *u2_index = i2;
 }
 u1* ClassFileParser::parse_stackmap_table(
     u4 code_attribute_length, TRAPS) {
   if (code_attribute_length == 0)
     return NULL;
   ClassFileStream* cfs = stream();
   u1* stackmap_table_start = cfs->get_u1_buffer();
   assert(stackmap_table_start != NULL, "null stackmap table");
   // check code_attribute_length first
   stream()->skip_u1(code_attribute_length, CHECK_NULL);
   if (!_need_verify && !DumpSharedSpaces) {
     return NULL;
   }
   return stackmap_table_start;
 }
 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
                                               u4 method_attribute_length,
                                               TRAPS) {
   ClassFileStream* cfs = stream();
   cfs->guarantee_more(2, CHECK_NULL);  // checked_exceptions_length
   *checked_exceptions_length = cfs->get_u2_fast();
   unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
   u2* checked_exceptions_start = cfs->get_u2_buffer();
   assert(checked_exceptions_start != NULL, "null checked exceptions");
   if (!_need_verify) {
     cfs->skip_u2_fast(size);
   } else {
     // Verify each value in the checked exception table
     u2 checked_exception;
     u2 len = *checked_exceptions_length;
     cfs->guarantee_more(2 * len, CHECK_NULL);
     for (int i = 0; i < len; i++) {
       checked_exception = cfs->get_u2_fast();
       check_property(
         valid_klass_reference_at(checked_exception),
         "Exception name has bad type at constant pool %u in class file %s",
         checked_exception, CHECK_NULL);
     }
   }
   // check exceptions attribute length
   if (_need_verify) {
     guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
                                                    sizeof(u2) * size),
                       "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
   }
   return checked_exceptions_start;
 }
 void ClassFileParser::throwIllegalSignature(
     const char* type, Symbol* name, Symbol* sig, TRAPS) {
   ResourceMark rm(THREAD);
   Exceptions::fthrow(THREAD_AND_LOCATION,
       vmSymbols::java_lang_ClassFormatError(),
       "%s \"%s\" in class %s has illegal signature \"%s\"", type,
       name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
 }
 // Skip an annotation.  Return >=limit if there is any problem.
 int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
   // annotation := atype:u2 do(nmem:u2) {member:u2 value}
   // value := switch (tag:u1) { ... }
   index += 2;  // skip atype
   if ((index += 2) >= limit)  return limit;  // read nmem
   int nmem = Bytes::get_Java_u2(buffer+index-2);
   while (--nmem >= 0 && index < limit) {
     index += 2; // skip member
     index = skip_annotation_value(buffer, limit, index);
   }
   return index;
 }
 // Skip an annotation value.  Return >=limit if there is any problem.
 int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
   // value := switch (tag:u1) {
   //   case B, C, I, S, Z, D, F, J, c: con:u2;
   //   case e: e_class:u2 e_name:u2;
   //   case s: s_con:u2;
   //   case [: do(nval:u2) {value};
   //   case @: annotation;
   //   case s: s_con:u2;
   // }
   if ((index += 1) >= limit)  return limit;  // read tag
   u1 tag = buffer[index-1];
   switch (tag) {
   case 'B': case 'C': case 'I': case 'S': case 'Z':
   case 'D': case 'F': case 'J': case 'c': case 's':
     index += 2;  // skip con or s_con
     break;
   case 'e':
     index += 4;  // skip e_class, e_name
     break;
   case '[':
     {
       if ((index += 2) >= limit)  return limit;  // read nval
       int nval = Bytes::get_Java_u2(buffer+index-2);
       while (--nval >= 0 && index < limit) {
         index = skip_annotation_value(buffer, limit, index);
       }
     }
     break;
   case '@':
     index = skip_annotation(buffer, limit, index);
     break;
   default:
     assert(false, "annotation tag");
     return limit;  //  bad tag byte
   }
   return index;
 }
 // Sift through annotations, looking for those significant to the VM:
 void ClassFileParser::parse_annotations(u1* buffer, int limit,
                                         ClassFileParser::AnnotationCollector* coll,
                                         TRAPS) {
   // annotations := do(nann:u2) {annotation}
   int index = 0;
   if ((index += 2) >= limit)  return;  // read nann
   int nann = Bytes::get_Java_u2(buffer+index-2);
   enum {  // initial annotation layout
     atype_off = 0,      // utf8 such as 'Ljava/lang/annotation/Retention;'
     count_off = 2,      // u2   such as 1 (one value)
     member_off = 4,     // utf8 such as 'value'
     tag_off = 6,        // u1   such as 'c' (type) or 'e' (enum)
     e_tag_val = 'e',
       e_type_off = 7,   // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
       e_con_off = 9,    // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
       e_size = 11,     // end of 'e' annotation
     c_tag_val = 'c',    // payload is type
       c_con_off = 7,    // utf8 payload, such as 'I'
       c_size = 9,       // end of 'c' annotation
     s_tag_val = 's',    // payload is String
       s_con_off = 7,    // utf8 payload, such as 'Ljava/lang/String;'
       s_size = 9,
     min_size = 6        // smallest possible size (zero members)
   };
   while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
     int index0 = index;
     index = skip_annotation(buffer, limit, index);
     u1* abase = buffer + index0;
     int atype = Bytes::get_Java_u2(abase + atype_off);
     int count = Bytes::get_Java_u2(abase + count_off);
     Symbol* aname = check_symbol_at(_cp, atype);
     if (aname == NULL)  break;  // invalid annotation name
     Symbol* member = NULL;
     if (count >= 1) {
       int member_index = Bytes::get_Java_u2(abase + member_off);
       member = check_symbol_at(_cp, member_index);
       if (member == NULL)  break;  // invalid member name
     }
     // Here is where parsing particular annotations will take place.
     AnnotationCollector::ID id = coll->annotation_index(_loader_data, aname);
     if (id == AnnotationCollector::_unknown)  continue;
     coll->set_annotation(id);
     if (id == AnnotationCollector::_sun_misc_Contended) {
       // @Contended can optionally specify the contention group.
       //
       // Contended group defines the equivalence class over the fields:
       // the fields within the same contended group are not treated distinct.
       // The only exception is default group, which does not incur the
       // equivalence. Naturally, contention group for classes is meaningless.
       //
       // While the contention group is specified as String, annotation
       // values are already interned, and we might as well use the constant
       // pool index as the group tag.
       //
       u2 group_index = 0; // default contended group
       if (count == 1
           && s_size == (index - index0)  // match size
           && s_tag_val == *(abase + tag_off)
           && member == vmSymbols::value_name()) {
         group_index = Bytes::get_Java_u2(abase + s_con_off);
         if (_cp->symbol_at(group_index)->utf8_length() == 0) {
           group_index = 0; // default contended group
         }
       }
       coll->set_contended_group(group_index);
     }
   }
 }
 ClassFileParser::AnnotationCollector::ID
 ClassFileParser::AnnotationCollector::annotation_index(ClassLoaderData* loader_data,
                                                                 Symbol* name) {
   vmSymbols::SID sid = vmSymbols::find_sid(name);
   // Privileged code can use all annotations.  Other code silently drops some.
   const bool privileged = loader_data->is_the_null_class_loader_data() ||
                           loader_data->is_ext_class_loader_data() ||
                           loader_data->is_anonymous();
   switch (sid) {
   case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature):
     if (_location != _in_method)  break;  // only allow for methods
     if (!privileged)              break;  // only allow in privileged code
     return _method_CallerSensitive;
   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
     if (_location != _in_method)  break;  // only allow for methods
     if (!privileged)              break;  // only allow in privileged code
     return _method_ForceInline;
   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
     if (_location != _in_method)  break;  // only allow for methods
     if (!privileged)              break;  // only allow in privileged code
     return _method_DontInline;
   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
     if (_location != _in_method)  break;  // only allow for methods
     if (!privileged)              break;  // only allow in privileged code
     return _method_LambdaForm_Compiled;
   case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
     if (_location != _in_method)  break;  // only allow for methods
     if (!privileged)              break;  // only allow in privileged code
     return _method_LambdaForm_Hidden;
   case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_misc_Contended_signature):
     if (_location != _in_field && _location != _in_class)          break;  // only allow for fields and classes
     if (!EnableContended || (RestrictContended && !privileged))    break;  // honor privileges
     return _sun_misc_Contended;
   default: break;
   }
   return AnnotationCollector::_unknown;
 }
 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
   if (is_contended())
     f->set_contended_group(contended_group());
 }
 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
   // If there's an error deallocate metadata for field annotations
   MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
   MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
 }
 void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
   if (has_annotation(_method_CallerSensitive))
     m->set_caller_sensitive(true);
   if (has_annotation(_method_ForceInline))
     m->set_force_inline(true);
   if (has_annotation(_method_DontInline))
     m->set_dont_inline(true);
   if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
     m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
   if (has_annotation(_method_LambdaForm_Hidden))
     m->set_hidden(true);
 }
 void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
   k->set_is_contended(is_contended());
 }
 #define MAX_ARGS_SIZE 255
 #define MAX_CODE_SIZE 65535
 #define INITIAL_MAX_LVT_NUMBER 256
 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
  *
  * Rules for LVT's and LVTT's are:
  *   - There can be any number of LVT's and LVTT's.
  *   - If there are n LVT's, it is the same as if there was just
  *     one LVT containing all the entries from the n LVT's.
  *   - There may be no more than one LVT entry per local variable.
  *     Two LVT entries are 'equal' if these fields are the same:
  *        start_pc, length, name, slot
  *   - There may be no more than one LVTT entry per each LVT entry.
  *     Each LVTT entry has to match some LVT entry.
  *   - HotSpot internal LVT keeps natural ordering of class file LVT entries.
  */
 void ClassFileParser::copy_localvariable_table(ConstMethod* cm,
                                                int lvt_cnt,
                                                u2* localvariable_table_length,
                                                u2** localvariable_table_start,
                                                int lvtt_cnt,
                                                u2* localvariable_type_table_length,
                                                u2** localvariable_type_table_start,
                                                TRAPS) {
   LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
   initialize_hashtable(lvt_Hash);
   // To fill LocalVariableTable in
   Classfile_LVT_Element*  cf_lvt;
   LocalVariableTableElement* lvt = cm->localvariable_table_start();
   for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
     cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
     for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
       copy_lvt_element(&cf_lvt[idx], lvt);
       // If no duplicates, add LVT elem in hashtable lvt_Hash.
       if (LVT_put_after_lookup(lvt, lvt_Hash) == false
           && _need_verify
           && _major_version >= JAVA_1_5_VERSION) {
         clear_hashtable(lvt_Hash);
         classfile_parse_error("Duplicated LocalVariableTable attribute "
                               "entry for '%s' in class file %s",
                                _cp->symbol_at(lvt->name_cp_index)->as_utf8(),
                                CHECK);
       }
     }
   }
   // To merge LocalVariableTable and LocalVariableTypeTable
   Classfile_LVT_Element* cf_lvtt;
   LocalVariableTableElement lvtt_elem;
   for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
     cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
     for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
       copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
       int index = hash(&lvtt_elem);
       LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
       if (entry == NULL) {
         if (_need_verify) {
           clear_hashtable(lvt_Hash);
           classfile_parse_error("LVTT entry for '%s' in class file %s "
                                 "does not match any LVT entry",
                                  _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
                                  CHECK);
         }
       } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
         clear_hashtable(lvt_Hash);
         classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
                               "entry for '%s' in class file %s",
                                _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
                                CHECK);
       } else {
         // to add generic signatures into LocalVariableTable
         entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
       }
     }
   }
   clear_hashtable(lvt_Hash);
 }
 void ClassFileParser::copy_method_annotations(ConstMethod* cm,
                                        u1* runtime_visible_annotations,
                                        int runtime_visible_annotations_length,
                                        u1* runtime_invisible_annotations,
                                        int runtime_invisible_annotations_length,
                                        u1* runtime_visible_parameter_annotations,
                                        int runtime_visible_parameter_annotations_length,
                                        u1* runtime_invisible_parameter_annotations,
                                        int runtime_invisible_parameter_annotations_length,
                                        u1* runtime_visible_type_annotations,
                                        int runtime_visible_type_annotations_length,
                                        u1* runtime_invisible_type_annotations,
                                        int runtime_invisible_type_annotations_length,
                                        u1* annotation_default,
                                        int annotation_default_length,
                                        TRAPS) {
   AnnotationArray* a;
   if (runtime_visible_annotations_length +
       runtime_invisible_annotations_length > 0) {
      a = assemble_annotations(runtime_visible_annotations,
                               runtime_visible_annotations_length,
                               runtime_invisible_annotations,
                               runtime_invisible_annotations_length,
                               CHECK);
      cm->set_method_annotations(a);
   }
   if (runtime_visible_parameter_annotations_length +
       runtime_invisible_parameter_annotations_length > 0) {
     a = assemble_annotations(runtime_visible_parameter_annotations,
                              runtime_visible_parameter_annotations_length,
                              runtime_invisible_parameter_annotations,
                              runtime_invisible_parameter_annotations_length,
                              CHECK);
     cm->set_parameter_annotations(a);
   }
   if (annotation_default_length > 0) {
     a = assemble_annotations(annotation_default,
                              annotation_default_length,
                              NULL,
 ,
                              CHECK);
     cm->set_default_annotations(a);
   }
   if (runtime_visible_type_annotations_length +
       runtime_invisible_type_annotations_length > 0) {
     a = assemble_annotations(runtime_visible_type_annotations,
                              runtime_visible_type_annotations_length,
                              runtime_invisible_type_annotations,
                              runtime_invisible_type_annotations_length,
                              CHECK);
     cm->set_type_annotations(a);
   }
 }
 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
 // Method* to save footprint, so we only know the size of the resulting Method* when the
 // entire method attribute is parsed.
 //
 // The promoted_flags parameter is used to pass relevant access_flags
 // from the method back up to the containing klass. These flag values
 // are added to klass's access_flags.
 methodHandle ClassFileParser::parse_method(bool is_interface,
                                            AccessFlags *promoted_flags,
                                            TRAPS) {
   ClassFileStream* cfs = stream();
   methodHandle nullHandle;
   ResourceMark rm(THREAD);
   // Parse fixed parts
   cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
   int flags = cfs->get_u2_fast();
   u2 name_index = cfs->get_u2_fast();
   int cp_size = _cp->length();
   check_property(
     valid_symbol_at(name_index),
     "Illegal constant pool index %u for method name in class file %s",
     name_index, CHECK_(nullHandle));
   Symbol*  name = _cp->symbol_at(name_index);
   verify_legal_method_name(name, CHECK_(nullHandle));
   u2 signature_index = cfs->get_u2_fast();
   guarantee_property(
     valid_symbol_at(signature_index),
     "Illegal constant pool index %u for method signature in class file %s",
     signature_index, CHECK_(nullHandle));
   Symbol*  signature = _cp->symbol_at(signature_index);
   AccessFlags access_flags;
   if (name == vmSymbols::class_initializer_name()) {
     // We ignore the other access flags for a valid class initializer.
     // (JVM Spec 2nd ed., chapter 4.6)
     if (_major_version < 51) { // backward compatibility
       flags = JVM_ACC_STATIC;
     } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
       flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
     }
   } else {
     verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
   }
   int args_size = -1;  // only used when _need_verify is true
   if (_need_verify) {
     args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
                  verify_legal_method_signature(name, signature, CHECK_(nullHandle));
     if (args_size > MAX_ARGS_SIZE) {
       classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
     }
   }
   access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
   // Default values for code and exceptions attribute elements
   u2 max_stack = 0;
   u2 max_locals = 0;
   u4 code_length = 0;
   u1* code_start = 0;
   u2 exception_table_length = 0;
   u2* exception_table_start = NULL;
   Array<int>* exception_handlers = Universe::the_empty_int_array();
   u2 checked_exceptions_length = 0;
   u2* checked_exceptions_start = NULL;
   CompressedLineNumberWriteStream* linenumber_table = NULL;
   int linenumber_table_length = 0;
   int total_lvt_length = 0;
   u2 lvt_cnt = 0;
   u2 lvtt_cnt = 0;
   bool lvt_allocated = false;
   u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
   u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
   u2* localvariable_table_length;
   u2** localvariable_table_start;
   u2* localvariable_type_table_length;
   u2** localvariable_type_table_start;
   u2 method_parameters_length = 0;
   u1* method_parameters_data = NULL;
   bool method_parameters_seen = false;
   bool parsed_code_attribute = false;
   bool parsed_checked_exceptions_attribute = false;
   bool parsed_stackmap_attribute = false;
   // stackmap attribute - JDK1.5
   u1* stackmap_data = NULL;
   int stackmap_data_length = 0;
   u2 generic_signature_index = 0;
   MethodAnnotationCollector parsed_annotations;
   u1* runtime_visible_annotations = NULL;
   int runtime_visible_annotations_length = 0;
   u1* runtime_invisible_annotations = NULL;
   int runtime_invisible_annotations_length = 0;
   u1* runtime_visible_parameter_annotations = NULL;
   int runtime_visible_parameter_annotations_length = 0;
   u1* runtime_invisible_parameter_annotations = NULL;
   int runtime_invisible_parameter_annotations_length = 0;
   u1* runtime_visible_type_annotations = NULL;
   int runtime_visible_type_annotations_length = 0;
   u1* runtime_invisible_type_annotations = NULL;
   int runtime_invisible_type_annotations_length = 0;
   u1* annotation_default = NULL;
   int annotation_default_length = 0;
   // Parse code and exceptions attribute
   u2 method_attributes_count = cfs->get_u2_fast();
   while (method_attributes_count--) {
     cfs->guarantee_more(6, CHECK_(nullHandle));  // method_attribute_name_index, method_attribute_length
     u2 method_attribute_name_index = cfs->get_u2_fast();
     u4 method_attribute_length = cfs->get_u4_fast();
     check_property(
       valid_symbol_at(method_attribute_name_index),
       "Invalid method attribute name index %u in class file %s",
       method_attribute_name_index, CHECK_(nullHandle));
     Symbol* method_attribute_name = _cp->symbol_at(method_attribute_name_index);
     if (method_attribute_name == vmSymbols::tag_code()) {
       // Parse Code attribute
       if (_need_verify) {
         guarantee_property(
             !access_flags.is_native() && !access_flags.is_abstract(),
                         "Code attribute in native or abstract methods in class file %s",
                          CHECK_(nullHandle));
       }
       if (parsed_code_attribute) {
         classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
       }
       parsed_code_attribute = true;
       // Stack size, locals size, and code size
       if (_major_version == 45 && _minor_version <= 2) {
         cfs->guarantee_more(4, CHECK_(nullHandle));
         max_stack = cfs->get_u1_fast();
         max_locals = cfs->get_u1_fast();
         code_length = cfs->get_u2_fast();
       } else {
         cfs->guarantee_more(8, CHECK_(nullHandle));
         max_stack = cfs->get_u2_fast();
         max_locals = cfs->get_u2_fast();
         code_length = cfs->get_u4_fast();
       }
       if (_need_verify) {
         guarantee_property(args_size <= max_locals,
                            "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
         guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
                            "Invalid method Code length %u in class file %s",
                            code_length, CHECK_(nullHandle));
       }
       // Code pointer
       code_start = cfs->get_u1_buffer();
       assert(code_start != NULL, "null code start");
       cfs->guarantee_more(code_length, CHECK_(nullHandle));
       cfs->skip_u1_fast(code_length);
       // Exception handler table
       cfs->guarantee_more(2, CHECK_(nullHandle));  // exception_table_length
       exception_table_length = cfs->get_u2_fast();
       if (exception_table_length > 0) {
         exception_table_start =
               parse_exception_table(code_length, exception_table_length, CHECK_(nullHandle));
       }
       // Parse additional attributes in code attribute
       cfs->guarantee_more(2, CHECK_(nullHandle));  // code_attributes_count
       u2 code_attributes_count = cfs->get_u2_fast();
       unsigned int calculated_attribute_length = 0;
       if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
         calculated_attribute_length =
             sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
       } else {
         // max_stack, locals and length are smaller in pre-version 45.2 classes
         calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
       }
       calculated_attribute_length +=
         code_length +
         sizeof(exception_table_length) +
         sizeof(code_attributes_count) +
         exception_table_length *
             ( sizeof(u2) +   // start_pc
               sizeof(u2) +   // end_pc
               sizeof(u2) +   // handler_pc
               sizeof(u2) );  // catch_type_index
       while (code_attributes_count--) {
         cfs->guarantee_more(6, CHECK_(nullHandle));  // code_attribute_name_index, code_attribute_length
         u2 code_attribute_name_index = cfs->get_u2_fast();
         u4 code_attribute_length = cfs->get_u4_fast();
         calculated_attribute_length += code_attribute_length +
                                        sizeof(code_attribute_name_index) +
                                        sizeof(code_attribute_length);
         check_property(valid_symbol_at(code_attribute_name_index),
                        "Invalid code attribute name index %u in class file %s",
                        code_attribute_name_index,
                        CHECK_(nullHandle));
         if (LoadLineNumberTables &&
             _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
           // Parse and compress line number table
           parse_linenumber_table(code_attribute_length, code_length,
             &linenumber_table, CHECK_(nullHandle));
         } else if (LoadLocalVariableTables &&
                    _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
           // Parse local variable table
           if (!lvt_allocated) {
             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
             lvt_allocated = true;
           }
           if (lvt_cnt == max_lvt_cnt) {
             max_lvt_cnt <<= 1;
             REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
             REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
           }
           localvariable_table_start[lvt_cnt] =
             parse_localvariable_table(code_length,
                                       max_locals,
                                       code_attribute_length,
                                       &localvariable_table_length[lvt_cnt],
                                       false,    // is not LVTT
                                       CHECK_(nullHandle));
           total_lvt_length += localvariable_table_length[lvt_cnt];
           lvt_cnt++;
         } else if (LoadLocalVariableTypeTables &&
                    _major_version >= JAVA_1_5_VERSION &&
                    _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
           if (!lvt_allocated) {
             localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
             localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
             localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
               THREAD, u2,  INITIAL_MAX_LVT_NUMBER);
             localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
               THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
             lvt_allocated = true;
           }
           // Parse local variable type table
           if (lvtt_cnt == max_lvtt_cnt) {
             max_lvtt_cnt <<= 1;
             REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
             REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
           }
           localvariable_type_table_start[lvtt_cnt] =
             parse_localvariable_table(code_length,
                                       max_locals,
                                       code_attribute_length,
                                       &localvariable_type_table_length[lvtt_cnt],
                                       true,     // is LVTT
                                       CHECK_(nullHandle));
           lvtt_cnt++;
         } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
                    _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
           // Stack map is only needed by the new verifier in JDK1.5.
           if (parsed_stackmap_attribute) {
             classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
           }
           stackmap_data = parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
           stackmap_data_length = code_attribute_length;
           parsed_stackmap_attribute = true;
         } else {
           // Skip unknown attributes
           cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
         }
       }
       // check method attribute length
       if (_need_verify) {
         guarantee_property(method_attribute_length == calculated_attribute_length,
                            "Code segment has wrong length in class file %s", CHECK_(nullHandle));
       }
     } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
       // Parse Exceptions attribute
       if (parsed_checked_exceptions_attribute) {
         classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
       }
       parsed_checked_exceptions_attribute = true;
       checked_exceptions_start =
             parse_checked_exceptions(&checked_exceptions_length,
                                      method_attribute_length,
                                      CHECK_(nullHandle));
     } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
       // reject multiple method parameters
       if (method_parameters_seen) {
         classfile_parse_error("Multiple MethodParameters attributes in class file %s", CHECK_(nullHandle));
       }
       method_parameters_seen = true;
       method_parameters_length = cfs->get_u1_fast();
       if (method_attribute_length != (method_parameters_length * 4u) + 1u) {
         classfile_parse_error(
           "Invalid MethodParameters method attribute length %u in class file",
           method_attribute_length, CHECK_(nullHandle));
       }
       method_parameters_data = cfs->get_u1_buffer();
       cfs->skip_u2_fast(method_parameters_length);
       cfs->skip_u2_fast(method_parameters_length);
       // ignore this attribute if it cannot be reflected
       if (!SystemDictionary::Parameter_klass_loaded())
         method_parameters_length = 0;
     } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
       if (method_attribute_length != 0) {
         classfile_parse_error(
           "Invalid Synthetic method attribute length %u in class file %s",
           method_attribute_length, CHECK_(nullHandle));
       }
       // Should we check that there hasn't already been a synthetic attribute?
       access_flags.set_is_synthetic();
     } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
       if (method_attribute_length != 0) {
         classfile_parse_error(
           "Invalid Deprecated method attribute length %u in class file %s",
           method_attribute_length, CHECK_(nullHandle));
       }
     } else if (_major_version >= JAVA_1_5_VERSION) {
       if (method_attribute_name == vmSymbols::tag_signature()) {
         if (method_attribute_length != 2) {
           classfile_parse_error(
             "Invalid Signature attribute length %u in class file %s",
             method_attribute_length, CHECK_(nullHandle));
         }
         cfs->guarantee_more(2, CHECK_(nullHandle));  // generic_signature_index
         generic_signature_index = cfs->get_u2_fast();
       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
         runtime_visible_annotations_length = method_attribute_length;
         runtime_visible_annotations = cfs->get_u1_buffer();
         assert(runtime_visible_annotations != NULL, "null visible annotations");
         parse_annotations(runtime_visible_annotations,
             runtime_visible_annotations_length, &parsed_annotations,
             CHECK_(nullHandle));
         cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
       } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
         runtime_invisible_annotations_length = method_attribute_length;
         runtime_invisible_annotations = cfs->get_u1_buffer();
         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
         cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
         runtime_visible_parameter_annotations_length = method_attribute_length;
         runtime_visible_parameter_annotations = cfs->get_u1_buffer();
         assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
         cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
       } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
         runtime_invisible_parameter_annotations_length = method_attribute_length;
         runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
         assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
         cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
       } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
         annotation_default_length = method_attribute_length;
         annotation_default = cfs->get_u1_buffer();
         assert(annotation_default != NULL, "null annotation default");
         cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
       } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
         runtime_visible_type_annotations_length = method_attribute_length;
         runtime_visible_type_annotations = cfs->get_u1_buffer();
         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
         // No need for the VM to parse Type annotations
         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_(nullHandle));
       } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
         runtime_invisible_type_annotations_length = method_attribute_length;
         runtime_invisible_type_annotations = cfs->get_u1_buffer();
         assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
         cfs->skip_u1(runtime_invisible_type_annotations_length, CHECK_(nullHandle));
       } else {
         // Skip unknown attributes
         cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
       }
     } else {
       // Skip unknown attributes
       cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
     }
   }
   if (linenumber_table != NULL) {
     linenumber_table->write_terminator();
     linenumber_table_length = linenumber_table->position();
   }
   // Make sure there's at least one Code attribute in non-native/non-abstract method
   if (_need_verify) {
     guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
                       "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
   }
   // All sizing information for a Method* is finally available, now create it
   InlineTableSizes sizes(
       total_lvt_length,
       linenumber_table_length,
       exception_table_length,
       checked_exceptions_length,
       method_parameters_length,
       generic_signature_index,
       runtime_visible_annotations_length +
            runtime_invisible_annotations_length,
       runtime_visible_parameter_annotations_length +
            runtime_invisible_parameter_annotations_length,
       runtime_visible_type_annotations_length +
            runtime_invisible_type_annotations_length,
       annotation_default_length,
 );
   Method* m = Method::allocate(
       _loader_data, code_length, access_flags, &sizes,
       ConstMethod::NORMAL, CHECK_(nullHandle));
   ClassLoadingService::add_class_method_size(m->size()*HeapWordSize);
   // Fill in information from fixed part (access_flags already set)
   m->set_constants(_cp);
   m->set_name_index(name_index);
   m->set_signature_index(signature_index);
 #ifdef CC_INTERP
   // hmm is there a gc issue here??
   ResultTypeFinder rtf(_cp->symbol_at(signature_index));
   m->set_result_index(rtf.type());
 #endif
   if (args_size >= 0) {
     m->set_size_of_parameters(args_size);
   } else {
     m->compute_size_of_parameters(THREAD);
   }
 #ifdef ASSERT
   if (args_size >= 0) {
     m->compute_size_of_parameters(THREAD);
     assert(args_size == m->size_of_parameters(), "");
   }
 #endif
   // Fill in code attribute information
   m->set_max_stack(max_stack);
   m->set_max_locals(max_locals);
   if (stackmap_data != NULL) {
     m->constMethod()->copy_stackmap_data(_loader_data, stackmap_data,
                                          stackmap_data_length, CHECK_NULL);
   }
   // Copy byte codes
   m->set_code(code_start);
   // Copy line number table
   if (linenumber_table != NULL) {
     memcpy(m->compressed_linenumber_table(),
            linenumber_table->buffer(), linenumber_table_length);
   }
   // Copy exception table
   if (exception_table_length > 0) {
     int size =
       exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
     copy_u2_with_conversion((u2*) m->exception_table_start(),
                              exception_table_start, size);
   }
   // Copy method parameters
   if (method_parameters_length > 0) {
     MethodParametersElement* elem = m->constMethod()->method_parameters_start();
     for (int i = 0; i < method_parameters_length; i++) {
       elem[i].name_cp_index = Bytes::get_Java_u2(method_parameters_data);
       method_parameters_data += 2;
       elem[i].flags = Bytes::get_Java_u2(method_parameters_data);
       method_parameters_data += 2;
     }
   }
   // Copy checked exceptions
   if (checked_exceptions_length > 0) {
     int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
     copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
   }
   // Copy class file LVT's/LVTT's into the HotSpot internal LVT.
   if (total_lvt_length > 0) {
     promoted_flags->set_has_localvariable_table();
     copy_localvariable_table(m->constMethod(), lvt_cnt,
                              localvariable_table_length,
                              localvariable_table_start,
                              lvtt_cnt,
                              localvariable_type_table_length,
                              localvariable_type_table_start, CHECK_NULL);
   }
   if (parsed_annotations.has_any_annotations())
     parsed_annotations.apply_to(m);
   // Copy annotations
   copy_method_annotations(m->constMethod(),
                           runtime_visible_annotations,
                           runtime_visible_annotations_length,
                           runtime_invisible_annotations,
                           runtime_invisible_annotations_length,
                           runtime_visible_parameter_annotations,
                           runtime_visible_parameter_annotations_length,
                           runtime_invisible_parameter_annotations,
                           runtime_invisible_parameter_annotations_length,
                           runtime_visible_type_annotations,
                           runtime_visible_type_annotations_length,
                           runtime_invisible_type_annotations,
                           runtime_invisible_type_annotations_length,
                           annotation_default,
                           annotation_default_length,
                           CHECK_NULL);
   if (name == vmSymbols::finalize_method_name() &&
       signature == vmSymbols::void_method_signature()) {
     if (m->is_empty_method()) {
       _has_empty_finalizer = true;
     } else {
       _has_finalizer = true;
     }
   }
   if (name == vmSymbols::object_initializer_name() &&
       signature == vmSymbols::void_method_signature() &&
       m->is_vanilla_constructor()) {
     _has_vanilla_constructor = true;
   }
   NOT_PRODUCT(m->verify());
   return m;
 }
 // The promoted_flags parameter is used to pass relevant access_flags
 // from the methods back up to the containing klass. These flag values
 // are added to klass's access_flags.
 Array<Method*>* ClassFileParser::parse_methods(bool is_interface,
                                                AccessFlags* promoted_flags,
                                                bool* has_final_method,
                                                bool* has_default_methods,
                                                TRAPS) {
   ClassFileStream* cfs = stream();
   cfs->guarantee_more(2, CHECK_NULL);  // length
   u2 length = cfs->get_u2_fast();
   if (length == 0) {
     _methods = Universe::the_empty_method_array();
   } else {
     _methods = MetadataFactory::new_array<Method*>(_loader_data, length, NULL, CHECK_NULL);
     HandleMark hm(THREAD);
     for (int index = 0; index < length; index++) {
       methodHandle method = parse_method(is_interface,
                                          promoted_flags,
                                          CHECK_NULL);
       if (method->is_final()) {
         *has_final_method = true;
       }
       if (is_interface && !method->is_abstract() && !method->is_static()) {
         // default method
         *has_default_methods = true;
       }
       _methods->at_put(index, method());
     }
     if (_need_verify && length > 1) {
       // Check duplicated methods
       ResourceMark rm(THREAD);
       NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
         THREAD, NameSigHash*, HASH_ROW_SIZE);
       initialize_hashtable(names_and_sigs);
       bool dup = false;
       {
         debug_only(No_Safepoint_Verifier nsv;)
         for (int i = 0; i < length; i++) {
           Method* m = _methods->at(i);
           // If no duplicates, add name/signature in hashtable names_and_sigs.
           if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
             dup = true;
             break;
           }
         }
       }
       if (dup) {
         classfile_parse_error("Duplicate method name&signature in class file %s",
                               CHECK_NULL);
       }
     }
   }
   return _methods;
 }
 intArray* ClassFileParser::sort_methods(Array<Method*>* methods) {
   int length = methods->length();
   // If JVMTI original method ordering or sharing is enabled we have to
   // remember the original class file ordering.
   // We temporarily use the vtable_index field in the Method* to store the
   // class file index, so we can read in after calling qsort.
   // Put the method ordering in the shared archive.
   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
     for (int index = 0; index < length; index++) {
       Method* m = methods->at(index);
       assert(!m->valid_vtable_index(), "vtable index should not be set");
       m->set_vtable_index(index);
     }
   }
   // Sort method array by ascending method name (for faster lookups & vtable construction)
   // Note that the ordering is not alphabetical, see Symbol::fast_compare
   Method::sort_methods(methods);
   intArray* method_ordering = NULL;
   // If JVMTI original method ordering or sharing is enabled construct int
   // array remembering the original ordering
   if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
     method_ordering = new intArray(length);
     for (int index = 0; index < length; index++) {
       Method* m = methods->at(index);
       int old_index = m->vtable_index();
       assert(old_index >= 0 && old_index < length, "invalid method index");
       method_ordering->at_put(index, old_index);
       m->set_vtable_index(Method::invalid_vtable_index);
     }
   }
   return method_ordering;
 }
 void ClassFileParser::parse_classfile_sourcefile_attribute(TRAPS) {
   ClassFileStream* cfs = stream();
   cfs->guarantee_more(2, CHECK);  // sourcefile_index
   u2 sourcefile_index = cfs->get_u2_fast();
   check_property(
     valid_symbol_at(sourcefile_index),
     "Invalid SourceFile attribute at constant pool index %u in class file %s",
     sourcefile_index, CHECK);
   set_class_sourcefile(_cp->symbol_at(sourcefile_index));
 }
 void ClassFileParser::parse_classfile_source_debug_extension_attribute(int length, TRAPS) {
   ClassFileStream* cfs = stream();
   u1* sde_buffer = cfs->get_u1_buffer();
   assert(sde_buffer != NULL, "null sde buffer");
   // Don't bother storing it if there is no way to retrieve it
   if (JvmtiExport::can_get_source_debug_extension()) {
     assert((length+1) > length, "Overflow checking");
     u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
     for (int i = 0; i < length; i++) {
       sde[i] = sde_buffer[i];
     }
     sde[length] = '\0';
     set_class_sde_buffer((char*)sde, length);
   }
   // Got utf8 string, set stream position forward
   cfs->skip_u1(length, CHECK);
 }
 // Inner classes can be static, private or protected (classic VM does this)
 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
 // Return number of classes in the inner classes attribute table
 u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start,
                                                             bool parsed_enclosingmethod_attribute,
                                                             u2 enclosing_method_class_index,
                                                             u2 enclosing_method_method_index,
                                                             TRAPS) {
   ClassFileStream* cfs = stream();
   u1* current_mark = cfs->current();
   u2 length = 0;
   if (inner_classes_attribute_start != NULL) {
     cfs->set_current(inner_classes_attribute_start);
     cfs->guarantee_more(2, CHECK_0);  // length
     length = cfs->get_u2_fast();
   }
   // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
   // method data:
   //   [inner_class_info_index,
   //    outer_class_info_index,
   //    inner_name_index,
   //    inner_class_access_flags,
   //    ...
   //    enclosing_method_class_index,
   //    enclosing_method_method_index]
   int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
   Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
   _inner_classes = inner_classes;
   int index = 0;
   int cp_size = _cp->length();
   cfs->guarantee_more(8 * length, CHECK_0);  // 4-tuples of u2
   for (int n = 0; n < length; n++) {
     // Inner class index
     u2 inner_class_info_index = cfs->get_u2_fast();
     check_property(
       inner_class_info_index == 0 ||
         valid_klass_reference_at(inner_class_info_index),
       "inner_class_info_index %u has bad constant type in class file %s",
       inner_class_info_index, CHECK_0);
     // Outer class index
     u2 outer_class_info_index = cfs->get_u2_fast();
     check_property(
       outer_class_info_index == 0 ||
         valid_klass_reference_at(outer_class_info_index),
       "outer_class_info_index %u has bad constant type in class file %s",
       outer_class_info_index, CHECK_0);
     // Inner class name
     u2 inner_name_index = cfs->get_u2_fast();
     check_property(
       inner_name_index == 0 || valid_symbol_at(inner_name_index),
       "inner_name_index %u has bad constant type in class file %s",
       inner_name_index, CHECK_0);
     if (_need_verify) {
       guarantee_property(inner_class_info_index != outer_class_info_index,
                          "Class is both outer and inner class in class file %s", CHECK_0);
     }
     // Access flags
     AccessFlags inner_access_flags;
     jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
     if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
       // Set abstract bit for old class files for backward compatibility
       flags |= JVM_ACC_ABSTRACT;
     }
     verify_legal_class_modifiers(flags, CHECK_0);
     inner_access_flags.set_flags(flags);
     inner_classes->at_put(index++, inner_class_info_index);
     inner_classes->at_put(index++, outer_class_info_index);
     inner_classes->at_put(index++, inner_name_index);
     inner_classes->at_put(index++, inner_access_flags.as_short());
   }
   // 4347400: make sure there's no duplicate entry in the classes array
   if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
     for(int i = 0; i < length * 4; i += 4) {
       for(int j = i + 4; j < length * 4; j += 4) {
         guarantee_property((inner_classes->at(i)   != inner_classes->at(j) ||
                             inner_classes->at(i+1) != inner_classes->at(j+1) ||
                             inner_classes->at(i+2) != inner_classes->at(j+2) ||
                             inner_classes->at(i+3) != inner_classes->at(j+3)),
                             "Duplicate entry in InnerClasses in class file %s",
                             CHECK_0);
       }
     }
   }
   // Set EnclosingMethod class and method indexes.
   if (parsed_enclosingmethod_attribute) {
     inner_classes->at_put(index++, enclosing_method_class_index);
     inner_classes->at_put(index++, enclosing_method_method_index);
   }
   assert(index == size, "wrong size");
   // Restore buffer's current position.
   cfs->set_current(current_mark);
   return length;
 }
 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
   set_class_synthetic_flag(true);
 }
 void ClassFileParser::parse_classfile_signature_attribute(TRAPS) {
   ClassFileStream* cfs = stream();
   u2 signature_index = cfs->get_u2(CHECK);
   check_property(
     valid_symbol_at(signature_index),
     "Invalid constant pool index %u in Signature attribute in class file %s",
     signature_index, CHECK);
   set_class_generic_signature(_cp->symbol_at(signature_index));
 }
 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(u4 attribute_byte_length, TRAPS) {
   ClassFileStream* cfs = stream();
   u1* current_start = cfs->current();
   cfs->guarantee_more(2, CHECK);  // length
   int attribute_array_length = cfs->get_u2_fast();
   guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
                      "Short length on BootstrapMethods in class file %s",
                      CHECK);
   // The attribute contains a counted array of counted tuples of shorts,
   // represending bootstrap specifiers:
   //    length*{bootstrap_method_index, argument_count*{argument_index}}
   int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
   // operand_count = number of shorts in attr, except for leading length
   // The attribute is copied into a short[] array.
   // The array begins with a series of short[2] pairs, one for each tuple.
   int index_size = (attribute_array_length * 2);
   Array<u2>* operands = MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
   // Eagerly assign operands so they will be deallocated with the constant
   // pool if there is an error.
   _cp->set_operands(operands);
   int operand_fill_index = index_size;
   int cp_size = _cp->length();
   for (int n = 0; n < attribute_array_length; n++) {
     // Store a 32-bit offset into the header of the operand array.
     ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
     // Read a bootstrap specifier.
     cfs->guarantee_more(sizeof(u2) * 2, CHECK);  // bsm, argc
     u2 bootstrap_method_index = cfs->get_u2_fast();
     u2 argument_count = cfs->get_u2_fast();
     check_property(
       valid_cp_range(bootstrap_method_index, cp_size) &&
       _cp->tag_at(bootstrap_method_index).is_method_handle(),
       "bootstrap_method_index %u has bad constant type in class file %s",
       bootstrap_method_index,
       CHECK);
     operands->at_put(operand_fill_index++, bootstrap_method_index);
     operands->at_put(operand_fill_index++, argument_count);
     cfs->guarantee_more(sizeof(u2) * argument_count, CHECK);  // argv[argc]
     for (int j = 0; j < argument_count; j++) {
       u2 argument_index = cfs->get_u2_fast();
       check_property(
         valid_cp_range(argument_index, cp_size) &&
         _cp->tag_at(argument_index).is_loadable_constant(),
         "argument_index %u has bad constant type in class file %s",
         argument_index,
         CHECK);
       operands->at_put(operand_fill_index++, argument_index);
     }
   }
   assert(operand_fill_index == operands->length(), "exact fill");
   assert(ConstantPool::operand_array_length(operands) == attribute_array_length, "correct decode");
   u1* current_end = cfs->current();
   guarantee_property(current_end == current_start + attribute_byte_length,
                      "Bad length on BootstrapMethods in class file %s",
                      CHECK);
 }
 void ClassFileParser::parse_classfile_attributes(ClassFileParser::ClassAnnotationCollector* parsed_annotations,
                                                  TRAPS) {
   ClassFileStream* cfs = stream();
   // Set inner classes attribute to default sentinel
   _inner_classes = Universe::the_empty_short_array();
   cfs->guarantee_more(2, CHECK);  // attributes_count
   u2 attributes_count = cfs->get_u2_fast();
   bool parsed_sourcefile_attribute = false;
   bool parsed_innerclasses_attribute = false;
   bool parsed_enclosingmethod_attribute = false;
   bool parsed_bootstrap_methods_attribute = false;
   u1* runtime_visible_annotations = NULL;
   int runtime_visible_annotations_length = 0;
   u1* runtime_invisible_annotations = NULL;
   int runtime_invisible_annotations_length = 0;
   u1* runtime_visible_type_annotations = NULL;
   int runtime_visible_type_annotations_length = 0;
   u1* runtime_invisible_type_annotations = NULL;
   int runtime_invisible_type_annotations_length = 0;
   u1* inner_classes_attribute_start = NULL;
   u4  inner_classes_attribute_length = 0;
   u2  enclosing_method_class_index = 0;
   u2  enclosing_method_method_index = 0;
   // Iterate over attributes
   while (attributes_count--) {
     cfs->guarantee_more(6, CHECK);  // attribute_name_index, attribute_length
     u2 attribute_name_index = cfs->get_u2_fast();
     u4 attribute_length = cfs->get_u4_fast();
     check_property(
       valid_symbol_at(attribute_name_index),
       "Attribute name has bad constant pool index %u in class file %s",
       attribute_name_index, CHECK);
     Symbol* tag = _cp->symbol_at(attribute_name_index);
     if (tag == vmSymbols::tag_source_file()) {
       // Check for SourceFile tag
       if (_need_verify) {
         guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
       }
       if (parsed_sourcefile_attribute) {
         classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
       } else {
         parsed_sourcefile_attribute = true;
       }
       parse_classfile_sourcefile_attribute(CHECK);
     } else if (tag == vmSymbols::tag_source_debug_extension()) {
       // Check for SourceDebugExtension tag
       parse_classfile_source_debug_extension_attribute((int)attribute_length, CHECK);
     } else if (tag == vmSymbols::tag_inner_classes()) {
       // Check for InnerClasses tag
       if (parsed_innerclasses_attribute) {
         classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
       } else {
         parsed_innerclasses_attribute = true;
       }
       inner_classes_attribute_start = cfs->get_u1_buffer();
       inner_classes_attribute_length = attribute_length;
       cfs->skip_u1(inner_classes_attribute_length, CHECK);
     } else if (tag == vmSymbols::tag_synthetic()) {
       // Check for Synthetic tag
       // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
       if (attribute_length != 0) {
         classfile_parse_error(
           "Invalid Synthetic classfile attribute length %u in class file %s",
           attribute_length, CHECK);
       }
       parse_classfile_synthetic_attribute(CHECK);
     } else if (tag == vmSymbols::tag_deprecated()) {
       // Check for Deprecatd tag - 4276120
       if (attribute_length != 0) {
         classfile_parse_error(
           "Invalid Deprecated classfile attribute length %u in class file %s",
           attribute_length, CHECK);
       }
     } else if (_major_version >= JAVA_1_5_VERSION) {
       if (tag == vmSymbols::tag_signature()) {
         if (attribute_length != 2) {
           classfile_parse_error(
             "Wrong Signature attribute length %u in class file %s",
             attribute_length, CHECK);
         }
         parse_classfile_signature_attribute(CHECK);
       } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
         runtime_visible_annotations_length = attribute_length;
         runtime_visible_annotations = cfs->get_u1_buffer();
         assert(runtime_visible_annotations != NULL, "null visible annotations");
         parse_annotations(runtime_visible_annotations,
                           runtime_visible_annotations_length,
                           parsed_annotations,
                           CHECK);
         cfs->skip_u1(runtime_visible_annotations_length, CHECK);
       } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
         runtime_invisible_annotations_length = attribute_length;
         runtime_invisible_annotations = cfs->get_u1_buffer();
         assert(runtime_invisible_annotations != NULL, "null invisible annotations");
         cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
       } else if (tag == vmSymbols::tag_enclosing_method()) {
         if (parsed_enclosingmethod_attribute) {
           classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
         }   else {
           parsed_enclosingmethod_attribute = true;
         }
         cfs->guarantee_more(4, CHECK);  // class_index, method_index
         enclosing_method_class_index  = cfs->get_u2_fast();
         enclosing_method_method_index = cfs->get_u2_fast();
         if (enclosing_method_class_index == 0) {
           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
         }
         // Validate the constant pool indices and types
         check_property(valid_klass_reference_at(enclosing_method_class_index),
           "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
         if (enclosing_method_method_index != 0 &&
             (!_cp->is_within_bounds(enclosing_method_method_index) ||
              !_cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
         }
       } else if (tag == vmSymbols::tag_bootstrap_methods() &&
                  _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
         if (parsed_bootstrap_methods_attribute)
           classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
         parsed_bootstrap_methods_attribute = true;
         parse_classfile_bootstrap_methods_attribute(attribute_length, CHECK);
       } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
         runtime_visible_type_annotations_length = attribute_length;
         runtime_visible_type_annotations = cfs->get_u1_buffer();
         assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
         // No need for the VM to parse Type annotations
         cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
       } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
         runtime_invisible_type_annotations_length = attribute_length;
         runtime_invisible_type_annotations = cfs->get_u1_buffer();
         assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
         cfs->skip_u1(runtime_invisible_type_annotations_length, CHECK);
       } else {
         // Unknown attribute
         cfs->skip_u1(attribute_length, CHECK);
       }
     } else {
       // Unknown attribute
       cfs->skip_u1(attribute_length, CHECK);
     }
   }
   _annotations = assemble_annotations(runtime_visible_annotations,
                                       runtime_visible_annotations_length,
                                       runtime_invisible_annotations,
                                       runtime_invisible_annotations_length,
                                       CHECK);
   _type_annotations = assemble_annotations(runtime_visible_type_annotations,
                                            runtime_visible_type_annotations_length,
                                            runtime_invisible_type_annotations,
                                            runtime_invisible_type_annotations_length,
                                            CHECK);
   if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
     u2 num_of_classes = parse_classfile_inner_classes_attribute(
                             inner_classes_attribute_start,
                             parsed_innerclasses_attribute,
                             enclosing_method_class_index,
                             enclosing_method_method_index,
                             CHECK);
     if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
       guarantee_property(
         inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
         "Wrong InnerClasses attribute length in class file %s", CHECK);
     }
   }
   if (_max_bootstrap_specifier_index >= 0) {
     guarantee_property(parsed_bootstrap_methods_attribute,
                        "Missing BootstrapMethods attribute in class file %s", CHECK);
   }
 }
 void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
   if (_synthetic_flag)
     k->set_is_synthetic();
   if (_sourcefile != NULL) {
     _sourcefile->increment_refcount();
     k->set_source_file_name(_sourcefile);
   }
   if (_generic_signature != NULL) {
     _generic_signature->increment_refcount();
     k->set_generic_signature(_generic_signature);
   }
   if (_sde_buffer != NULL) {
     k->set_source_debug_extension(_sde_buffer, _sde_length);
   }
 }
 // Transfer ownership of metadata allocated to the InstanceKlass.
 void ClassFileParser::apply_parsed_class_metadata(
                                             instanceKlassHandle this_klass,
                                             int java_fields_count, TRAPS) {
   // Assign annotations if needed
   if (_annotations != NULL || _type_annotations != NULL ||
       _fields_annotations != NULL || _fields_type_annotations != NULL) {
     Annotations* annotations = Annotations::allocate(_loader_data, CHECK);
     annotations->set_class_annotations(_annotations);
     annotations->set_class_type_annotations(_type_annotations);
     annotations->set_fields_annotations(_fields_annotations);
     annotations->set_fields_type_annotations(_fields_type_annotations);
     this_klass->set_annotations(annotations);
   }
   _cp->set_pool_holder(this_klass());
   this_klass->set_constants(_cp);
   this_klass->set_fields(_fields, java_fields_count);
   this_klass->set_methods(_methods);
   this_klass->set_inner_classes(_inner_classes);
   this_klass->set_local_interfaces(_local_interfaces);
   this_klass->set_transitive_interfaces(_transitive_interfaces);
   // Clear out these fields so they don't get deallocated by the destructor
   clear_class_metadata();
 }
 AnnotationArray* ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
                                                        int runtime_visible_annotations_length,
                                                        u1* runtime_invisible_annotations,
                                                        int runtime_invisible_annotations_length, TRAPS) {
   AnnotationArray* annotations = NULL;
   if (runtime_visible_annotations != NULL ||
       runtime_invisible_annotations != NULL) {
     annotations = MetadataFactory::new_array<u1>(_loader_data,
                                           runtime_visible_annotations_length +
                                           runtime_invisible_annotations_length,
                                           CHECK_(annotations));
     if (runtime_visible_annotations != NULL) {
       for (int i = 0; i < runtime_visible_annotations_length; i++) {
         annotations->at_put(i, runtime_visible_annotations[i]);
       }
     }
     if (runtime_invisible_annotations != NULL) {
       for (int i = 0; i < runtime_invisible_annotations_length; i++) {
         int append = runtime_visible_annotations_length+i;
         annotations->at_put(append, runtime_invisible_annotations[i]);
       }
     }
   }
   return annotations;
 }
 #ifdef ASSERT
 static void parseAndPrintGenericSignatures(
     instanceKlassHandle this_klass, TRAPS) {
   assert(ParseAllGenericSignatures == true, "Shouldn't call otherwise");
   ResourceMark rm;
   if (this_klass->generic_signature() != NULL) {
     using namespace generic;
     ClassDescriptor* spec = ClassDescriptor::parse_generic_signature(this_klass(), CHECK);
     tty->print_cr("Parsing %s", this_klass->generic_signature()->as_C_string());
     spec->print_on(tty);
     for (int i = 0; i < this_klass->methods()->length(); ++i) {
       Method* m = this_klass->methods()->at(i);
       MethodDescriptor* method_spec = MethodDescriptor::parse_generic_signature(m, spec);
       Symbol* sig = m->generic_signature();
       if (sig == NULL) {
         sig = m->signature();
       }
       tty->print_cr("Parsing %s", sig->as_C_string());
       method_spec->print_on(tty);
     }
   }
 }
 #endif // def ASSERT
 instanceKlassHandle ClassFileParser::parse_super_class(int super_class_index,
                                                        TRAPS) {
   instanceKlassHandle super_klass;
   if (super_class_index == 0) {
     check_property(_class_name == vmSymbols::java_lang_Object(),
                    "Invalid superclass index %u in class file %s",
                    super_class_index,
                    CHECK_NULL);
   } else {
     check_property(valid_klass_reference_at(super_class_index),
                    "Invalid superclass index %u in class file %s",
                    super_class_index,
                    CHECK_NULL);
     // The class name should be legal because it is checked when parsing constant pool.
     // However, make sure it is not an array type.
     bool is_array = false;
     if (_cp->tag_at(super_class_index).is_klass()) {
       super_klass = instanceKlassHandle(THREAD, _cp->resolved_klass_at(super_class_index));
       if (_need_verify)
         is_array = super_klass->oop_is_array();
     } else if (_need_verify) {
       is_array = (_cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
     }
     if (_need_verify) {
       guarantee_property(!is_array,
                         "Bad superclass name in class file %s", CHECK_NULL);
     }
   }
   return super_klass;
 }
 // Values needed for oopmap and InstanceKlass creation
 class FieldLayoutInfo : public StackObj {
  public:
   int*          nonstatic_oop_offsets;
   unsigned int* nonstatic_oop_counts;
   unsigned int  nonstatic_oop_map_count;
   unsigned int  total_oop_map_count;
   int           instance_size;
   int           nonstatic_field_size;
   int           static_field_size;
   bool          has_nonstatic_fields;
 };
 // Layout fields and fill in FieldLayoutInfo.  Could use more refactoring!
 void ClassFileParser::layout_fields(Handle class_loader,
                                     FieldAllocationCount* fac,
                                     ClassAnnotationCollector* parsed_annotations,
                                     FieldLayoutInfo* info,
                                     TRAPS) {
   // Field size and offset computation
   int nonstatic_field_size = _super_klass() == NULL ? 0 : _super_klass()->nonstatic_field_size();
   int next_static_oop_offset;
   int next_static_double_offset;
   int next_static_word_offset;
   int next_static_short_offset;
   int next_static_byte_offset;
   int next_nonstatic_oop_offset;
   int next_nonstatic_double_offset;
   int next_nonstatic_word_offset;
   int next_nonstatic_short_offset;
   int next_nonstatic_byte_offset;
   int first_nonstatic_oop_offset;
   int next_nonstatic_field_offset;
   int next_nonstatic_padded_offset;
   // Count the contended fields by type.
   //
   // We ignore static fields, because @Contended is not supported for them.
   // The layout code below will also ignore the static fields.
   int nonstatic_contended_count = 0;
   FieldAllocationCount fac_contended;
   for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
     FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
     if (fs.is_contended()) {
       fac_contended.count[atype]++;
       if (!fs.access_flags().is_static()) {
         nonstatic_contended_count++;
       }
     }
   }
   // Calculate the starting byte offsets
   next_static_oop_offset      = InstanceMirrorKlass::offset_of_static_fields();
   next_static_double_offset   = next_static_oop_offset +
                                 ((fac->count[STATIC_OOP]) * heapOopSize);
   if ( fac->count[STATIC_DOUBLE] &&
        (Universe::field_type_should_be_aligned(T_DOUBLE) ||
         Universe::field_type_should_be_aligned(T_LONG)) ) {
     next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
   }
   next_static_word_offset     = next_static_double_offset +
                                 ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
   next_static_short_offset    = next_static_word_offset +
                                 ((fac->count[STATIC_WORD]) * BytesPerInt);
   next_static_byte_offset     = next_static_short_offset +
                                 ((fac->count[STATIC_SHORT]) * BytesPerShort);
   int nonstatic_fields_start  = instanceOopDesc::base_offset_in_bytes() +
                                 nonstatic_field_size * heapOopSize;
   next_nonstatic_field_offset = nonstatic_fields_start;
   bool is_contended_class     = parsed_annotations->is_contended();
   // Class is contended, pad before all the fields
   if (is_contended_class) {
     next_nonstatic_field_offset += ContendedPaddingWidth;
   }
   // Compute the non-contended fields count.
   // The packing code below relies on these counts to determine if some field
   // can be squeezed into the alignment gap. Contended fields are obviously
   // exempt from that.
   unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
   unsigned int nonstatic_word_count   = fac->count[NONSTATIC_WORD]   - fac_contended.count[NONSTATIC_WORD];
   unsigned int nonstatic_short_count  = fac->count[NONSTATIC_SHORT]  - fac_contended.count[NONSTATIC_SHORT];
   unsigned int nonstatic_byte_count   = fac->count[NONSTATIC_BYTE]   - fac_contended.count[NONSTATIC_BYTE];
   unsigned int nonstatic_oop_count    = fac->count[NONSTATIC_OOP]    - fac_contended.count[NONSTATIC_OOP];
   // Total non-static fields count, including every contended field
   unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
                                         fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
                                         fac->count[NONSTATIC_OOP];
   bool super_has_nonstatic_fields =
           (_super_klass() != NULL && _super_klass->has_nonstatic_fields());
   bool has_nonstatic_fields = super_has_nonstatic_fields || (nonstatic_fields_count != 0);
   // Prepare list of oops for oop map generation.
   //
   // "offset" and "count" lists are describing the set of contiguous oop
   // regions. offset[i] is the start of the i-th region, which then has
   // count[i] oops following. Before we know how many regions are required,
   // we pessimistically allocate the maps to fit all the oops into the
   // distinct regions.
   //
   // TODO: We add +1 to always allocate non-zero resource arrays; we need
   // to figure out if we still need to do this.
   int* nonstatic_oop_offsets;
   unsigned int* nonstatic_oop_counts;
   unsigned int nonstatic_oop_map_count = 0;
   unsigned int max_nonstatic_oop_maps  = fac->count[NONSTATIC_OOP] + 1;
   nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
             THREAD, int, max_nonstatic_oop_maps);
   nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
             THREAD, unsigned int, max_nonstatic_oop_maps);
   first_nonstatic_oop_offset = 0; // will be set for first oop field
   bool compact_fields   = CompactFields;
   int  allocation_style = FieldsAllocationStyle;
   if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
     assert(false, "0 <= FieldsAllocationStyle <= 2");
     allocation_style = 1; // Optimistic
   }
   // The next classes have predefined hard-coded fields offsets
   // (see in JavaClasses::compute_hard_coded_offsets()).
   // Use default fields allocation order for them.
   if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
       (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() ||
        _class_name == vmSymbols::java_lang_Class() ||
        _class_name == vmSymbols::java_lang_ClassLoader() ||
        _class_name == vmSymbols::java_lang_ref_Reference() ||
        _class_name == vmSymbols::java_lang_ref_SoftReference() ||
        _class_name == vmSymbols::java_lang_StackTraceElement() ||
        _class_name == vmSymbols::java_lang_String() ||
        _class_name == vmSymbols::java_lang_Throwable() ||
        _class_name == vmSymbols::java_lang_Boolean() ||
        _class_name == vmSymbols::java_lang_Character() ||
        _class_name == vmSymbols::java_lang_Float() ||
        _class_name == vmSymbols::java_lang_Double() ||
        _class_name == vmSymbols::java_lang_Byte() ||
        _class_name == vmSymbols::java_lang_Short() ||
        _class_name == vmSymbols::java_lang_Integer() ||
        _class_name == vmSymbols::java_lang_Long())) {
     allocation_style = 0;     // Allocate oops first
     compact_fields   = false; // Don't compact fields
   }
   // Rearrange fields for a given allocation style
   if( allocation_style == 0 ) {
     // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
     next_nonstatic_oop_offset    = next_nonstatic_field_offset;
     next_nonstatic_double_offset = next_nonstatic_oop_offset +
                                     (nonstatic_oop_count * heapOopSize);
   } else if( allocation_style == 1 ) {
     // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
     next_nonstatic_double_offset = next_nonstatic_field_offset;
   } else if( allocation_style == 2 ) {
     // Fields allocation: oops fields in super and sub classes are together.
     if( nonstatic_field_size > 0 && _super_klass() != NULL &&
         _super_klass->nonstatic_oop_map_size() > 0 ) {
       unsigned int map_count = _super_klass->nonstatic_oop_map_count();
       OopMapBlock* first_map = _super_klass->start_of_nonstatic_oop_maps();
       OopMapBlock* last_map = first_map + map_count - 1;
       int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
       if (next_offset == next_nonstatic_field_offset) {
         allocation_style = 0;   // allocate oops first
         next_nonstatic_oop_offset    = next_nonstatic_field_offset;
         next_nonstatic_double_offset = next_nonstatic_oop_offset +
                                        (nonstatic_oop_count * heapOopSize);
       }
     }
     if( allocation_style == 2 ) {
       allocation_style = 1;     // allocate oops last
       next_nonstatic_double_offset = next_nonstatic_field_offset;
     }
   } else {
     ShouldNotReachHere();
   }
   int nonstatic_oop_space_count   = 0;
   int nonstatic_word_space_count  = 0;
   int nonstatic_short_space_count = 0;
   int nonstatic_byte_space_count  = 0;
   int nonstatic_oop_space_offset;
   int nonstatic_word_space_offset;
   int nonstatic_short_space_offset;
   int nonstatic_byte_space_offset;
   // Try to squeeze some of the fields into the gaps due to
   // long/double alignment.
   if( nonstatic_double_count > 0 ) {
     int offset = next_nonstatic_double_offset;
     next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
     if( compact_fields && offset != next_nonstatic_double_offset ) {
       // Allocate available fields into the gap before double field.
       int length = next_nonstatic_double_offset - offset;
       assert(length == BytesPerInt, "");
       nonstatic_word_space_offset = offset;
       if( nonstatic_word_count > 0 ) {
         nonstatic_word_count      -= 1;
         nonstatic_word_space_count = 1; // Only one will fit
         length -= BytesPerInt;
         offset += BytesPerInt;
       }
       nonstatic_short_space_offset = offset;
       while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
         nonstatic_short_count       -= 1;
         nonstatic_short_space_count += 1;
         length -= BytesPerShort;
         offset += BytesPerShort;
       }
       nonstatic_byte_space_offset = offset;
       while( length > 0 && nonstatic_byte_count > 0 ) {
         nonstatic_byte_count       -= 1;
         nonstatic_byte_space_count += 1;
         length -= 1;
       }
       // Allocate oop field in the gap if there are no other fields for that.
       nonstatic_oop_space_offset = offset;
       if( length >= heapOopSize && nonstatic_oop_count > 0 &&
           allocation_style != 0 ) { // when oop fields not first
         nonstatic_oop_count      -= 1;
         nonstatic_oop_space_count = 1; // Only one will fit
         length -= heapOopSize;
         offset += heapOopSize;
       }
     }
   }
   next_nonstatic_word_offset  = next_nonstatic_double_offset +
                                 (nonstatic_double_count * BytesPerLong);
   next_nonstatic_short_offset = next_nonstatic_word_offset +
                                 (nonstatic_word_count * BytesPerInt);
   next_nonstatic_byte_offset  = next_nonstatic_short_offset +
                                 (nonstatic_short_count * BytesPerShort);
   next_nonstatic_padded_offset = next_nonstatic_byte_offset +
                                 nonstatic_byte_count;
   // let oops jump before padding with this allocation style
   if( allocation_style == 1 ) {
     next_nonstatic_oop_offset = next_nonstatic_padded_offset;
     if( nonstatic_oop_count > 0 ) {
       next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
     }
     next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
   }
   // Iterate over fields again and compute correct offsets.
   // The field allocation type was temporarily stored in the offset slot.
   // oop fields are located before non-oop fields (static and non-static).
   for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
     // skip already laid out fields
     if (fs.is_offset_set()) continue;
     // contended instance fields are handled below
     if (fs.is_contended() && !fs.access_flags().is_static()) continue;
     int real_offset;
     FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
     // pack the rest of the fields
     switch (atype) {
       case STATIC_OOP:
         real_offset = next_static_oop_offset;
         next_static_oop_offset += heapOopSize;
         break;
       case STATIC_BYTE:
         real_offset = next_static_byte_offset;
         next_static_byte_offset += 1;
         break;
       case STATIC_SHORT:
         real_offset = next_static_short_offset;
         next_static_short_offset += BytesPerShort;
         break;
       case STATIC_WORD:
         real_offset = next_static_word_offset;
         next_static_word_offset += BytesPerInt;
         break;
       case STATIC_DOUBLE:
         real_offset = next_static_double_offset;
         next_static_double_offset += BytesPerLong;
         break;
       case NONSTATIC_OOP:
         if( nonstatic_oop_space_count > 0 ) {
           real_offset = nonstatic_oop_space_offset;
           nonstatic_oop_space_offset += heapOopSize;
           nonstatic_oop_space_count  -= 1;
         } else {
           real_offset = next_nonstatic_oop_offset;
           next_nonstatic_oop_offset += heapOopSize;
         }
         // Update oop maps
         if( nonstatic_oop_map_count > 0 &&
             nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
             real_offset -
             int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
             heapOopSize ) {
           // Extend current oop map
           assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
           nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
         } else {
           // Create new oop map
           assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
           nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
           nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
           nonstatic_oop_map_count += 1;
           if( first_nonstatic_oop_offset == 0 ) { // Undefined
             first_nonstatic_oop_offset = real_offset;
           }
         }
         break;
       case NONSTATIC_BYTE:
         if( nonstatic_byte_space_count > 0 ) {
           real_offset = nonstatic_byte_space_offset;
           nonstatic_byte_space_offset += 1;
           nonstatic_byte_space_count  -= 1;
         } else {
           real_offset = next_nonstatic_byte_offset;
           next_nonstatic_byte_offset += 1;
         }
         break;
       case NONSTATIC_SHORT:
         if( nonstatic_short_space_count > 0 ) {
           real_offset = nonstatic_short_space_offset;
           nonstatic_short_space_offset += BytesPerShort;
           nonstatic_short_space_count  -= 1;
         } else {
           real_offset = next_nonstatic_short_offset;
           next_nonstatic_short_offset += BytesPerShort;
         }
         break;
       case NONSTATIC_WORD:
         if( nonstatic_word_space_count > 0 ) {
           real_offset = nonstatic_word_space_offset;
           nonstatic_word_space_offset += BytesPerInt;
           nonstatic_word_space_count  -= 1;
         } else {
           real_offset = next_nonstatic_word_offset;
           next_nonstatic_word_offset += BytesPerInt;
         }
         break;
       case NONSTATIC_DOUBLE:
         real_offset = next_nonstatic_double_offset;
         next_nonstatic_double_offset += BytesPerLong;
         break;
       default:
         ShouldNotReachHere();
     }
     fs.set_offset(real_offset);
   }
   // Handle the contended cases.
   //
   // Each contended field should not intersect the cache line with another contended field.
   // In the absence of alignment information, we end up with pessimistically separating
   // the fields with full-width padding.
   //
   // Additionally, this should not break alignment for the fields, so we round the alignment up
   // for each field.
   if (nonstatic_contended_count > 0) {
     // if there is at least one contended field, we need to have pre-padding for them
     next_nonstatic_padded_offset += ContendedPaddingWidth;
     // collect all contended groups
     BitMap bm(_cp->size());
     for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
       // skip already laid out fields
       if (fs.is_offset_set()) continue;
       if (fs.is_contended()) {
         bm.set_bit(fs.contended_group());
       }
     }
     int current_group = -1;
     while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
       for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
         // skip already laid out fields
         if (fs.is_offset_set()) continue;
         // skip non-contended fields and fields from different group
         if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
         // handle statics below
         if (fs.access_flags().is_static()) continue;
         int real_offset;
         FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
         switch (atype) {
           case NONSTATIC_BYTE:
             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
             real_offset = next_nonstatic_padded_offset;
             next_nonstatic_padded_offset += 1;
             break;
           case NONSTATIC_SHORT:
             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
             real_offset = next_nonstatic_padded_offset;
             next_nonstatic_padded_offset += BytesPerShort;
             break;
           case NONSTATIC_WORD:
             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
             real_offset = next_nonstatic_padded_offset;
             next_nonstatic_padded_offset += BytesPerInt;
             break;
           case NONSTATIC_DOUBLE:
             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
             real_offset = next_nonstatic_padded_offset;
             next_nonstatic_padded_offset += BytesPerLong;
             break;
           case NONSTATIC_OOP:
             next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
             real_offset = next_nonstatic_padded_offset;
             next_nonstatic_padded_offset += heapOopSize;
             // Create new oop map
             assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
             nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
             nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
             nonstatic_oop_map_count += 1;
             if( first_nonstatic_oop_offset == 0 ) { // Undefined
               first_nonstatic_oop_offset = real_offset;
             }
             break;
           default:
             ShouldNotReachHere();
         }
         if (fs.contended_group() == 0) {
           // Contended group defines the equivalence class over the fields:
           // the fields within the same contended group are not inter-padded.
           // The only exception is default group, which does not incur the
           // equivalence, and so requires intra-padding.
           next_nonstatic_padded_offset += ContendedPaddingWidth;
         }
         fs.set_offset(real_offset);
       } // for
       // Start laying out the next group.
       // Note that this will effectively pad the last group in the back;
       // this is expected to alleviate memory contention effects for
       // subclass fields and/or adjacent object.
       // If this was the default group, the padding is already in place.
       if (current_group != 0) {
         next_nonstatic_padded_offset += ContendedPaddingWidth;
       }
     }
     // handle static fields
   }
   // Entire class is contended, pad in the back.
   // This helps to alleviate memory contention effects for subclass fields
   // and/or adjacent object.
   if (is_contended_class) {
     next_nonstatic_padded_offset += ContendedPaddingWidth;
   }
   int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
   int nonstatic_fields_end      = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
   int instance_end              = align_size_up(notaligned_nonstatic_fields_end, wordSize);
   int static_fields_end         = align_size_up(next_static_byte_offset, wordSize);
   int static_field_size         = (static_fields_end -
                                    InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
   nonstatic_field_size          = nonstatic_field_size +
                                   (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
   int instance_size             = align_object_size(instance_end / wordSize);
   assert(instance_size == align_object_size(align_size_up(
          (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
           wordSize) / wordSize), "consistent layout helper value");
   // Invariant: nonstatic_field end/start should only change if there are
   // nonstatic fields in the class, or if the class is contended. We compare
   // against the non-aligned value, so that end alignment will not fail the
   // assert without actually having the fields.
   assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
          is_contended_class ||
          (nonstatic_fields_count > 0), "double-check nonstatic start/end");
   // Number of non-static oop map blocks allocated at end of klass.
   const unsigned int total_oop_map_count =
     compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
                           first_nonstatic_oop_offset);
 #ifndef PRODUCT
   if (PrintFieldLayout) {
     print_field_layout(_class_name,
           _fields,
           _cp,
           instance_size,
           nonstatic_fields_start,
           nonstatic_fields_end,
           static_fields_end);
   }
 #endif
   // Pass back information needed for InstanceKlass creation
   info->nonstatic_oop_offsets = nonstatic_oop_offsets;
   info->nonstatic_oop_counts = nonstatic_oop_counts;
   info->nonstatic_oop_map_count = nonstatic_oop_map_count;
   info->total_oop_map_count = total_oop_map_count;
   info->instance_size = instance_size;
   info->static_field_size = static_field_size;
   info->nonstatic_field_size = nonstatic_field_size;
   info->has_nonstatic_fields = has_nonstatic_fields;
 }
 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
                                                     ClassLoaderData* loader_data,
                                                     Handle protection_domain,
                                                     KlassHandle host_klass,
                                                     GrowableArray<Handle>* cp_patches,
                                                     TempNewSymbol& parsed_name,
                                                     bool verify,
                                                     TRAPS) {
   // When a retransformable agent is attached, JVMTI caches the
   // class bytes that existed before the first retransformation.
   // If RedefineClasses() was used before the retransformable
   // agent attached, then the cached class bytes may not be the
   // original class bytes.
   unsigned char *cached_class_file_bytes = NULL;
   jint cached_class_file_length;
   Handle class_loader(THREAD, loader_data->class_loader());
   bool has_default_methods = false;
   ResourceMark rm(THREAD);
   ClassFileStream* cfs = stream();
   // Timing
   assert(THREAD->is_Java_thread(), "must be a JavaThread");
   JavaThread* jt = (JavaThread*) THREAD;
   PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
                             ClassLoader::perf_class_parse_selftime(),
                             NULL,
                             jt->get_thread_stat()->perf_recursion_counts_addr(),
                             jt->get_thread_stat()->perf_timers_addr(),
                             PerfClassTraceTime::PARSE_CLASS);
   init_parsed_class_attributes(loader_data);
   if (JvmtiExport::should_post_class_file_load_hook()) {
     // Get the cached class file bytes (if any) from the class that
     // is being redefined or retransformed. We use jvmti_thread_state()
     // instead of JvmtiThreadState::state_for(jt) so we don't allocate
     // a JvmtiThreadState any earlier than necessary. This will help
     // avoid the bug described by 7126851.
     JvmtiThreadState *state = jt->jvmti_thread_state();
     if (state != NULL) {
       KlassHandle *h_class_being_redefined =
                      state->get_class_being_redefined();
       if (h_class_being_redefined != NULL) {
         instanceKlassHandle ikh_class_being_redefined =
           instanceKlassHandle(THREAD, (*h_class_being_redefined)());
         cached_class_file_bytes =
           ikh_class_being_redefined->get_cached_class_file_bytes();
         cached_class_file_length =
           ikh_class_being_redefined->get_cached_class_file_len();
       }
     }
     unsigned char* ptr = cfs->buffer();
     unsigned char* end_ptr = cfs->buffer() + cfs->length();
     JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain,
                                            &ptr, &end_ptr,
                                            &cached_class_file_bytes,
                                            &cached_class_file_length);
     if (ptr != cfs->buffer()) {
       // JVMTI agent has modified class file data.
       // Set new class file stream using JVMTI agent modified
       // class file data.
       cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
       set_stream(cfs);
     }
   }
   _host_klass = host_klass;
   _cp_patches = cp_patches;
   instanceKlassHandle nullHandle;
   // Figure out whether we can skip format checking (matching classic VM behavior)
   _need_verify = Verifier::should_verify_for(class_loader(), verify);
   // Set the verify flag in stream
   cfs->set_verify(_need_verify);
   // Save the class file name for easier error message printing.
   _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name();
   cfs->guarantee_more(8, CHECK_(nullHandle));  // magic, major, minor
   // Magic value
   u4 magic = cfs->get_u4_fast();
   guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
                      "Incompatible magic value %u in class file %s",
                      magic, CHECK_(nullHandle));
   // Version numbers
   u2 minor_version = cfs->get_u2_fast();
   u2 major_version = cfs->get_u2_fast();
   // Check version numbers - we check this even with verifier off
   if (!is_supported_version(major_version, minor_version)) {
     if (name == NULL) {
       Exceptions::fthrow(
         THREAD_AND_LOCATION,
         vmSymbols::java_lang_UnsupportedClassVersionError(),
         "Unsupported major.minor version %u.%u",
         major_version,
         minor_version);
     } else {
       ResourceMark rm(THREAD);
       Exceptions::fthrow(
         THREAD_AND_LOCATION,
         vmSymbols::java_lang_UnsupportedClassVersionError(),
         "%s : Unsupported major.minor version %u.%u",
         name->as_C_string(),
         major_version,
         minor_version);
     }
     return nullHandle;
   }
   _major_version = major_version;
   _minor_version = minor_version;
   // Check if verification needs to be relaxed for this class file
   // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
   _relax_verify = Verifier::relax_verify_for(class_loader());
   // Constant pool
   constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
   int cp_size = cp->length();
   cfs->guarantee_more(8, CHECK_(nullHandle));  // flags, this_class, super_class, infs_len
   // Access flags
   AccessFlags access_flags;
   jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
   if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
     // Set abstract bit for old class files for backward compatibility
     flags |= JVM_ACC_ABSTRACT;
   }
   verify_legal_class_modifiers(flags, CHECK_(nullHandle));
   access_flags.set_flags(flags);
   // This class and superclass
   u2 this_class_index = cfs->get_u2_fast();
   check_property(
     valid_cp_range(this_class_index, cp_size) &&
       cp->tag_at(this_class_index).is_unresolved_klass(),
     "Invalid this class index %u in constant pool in class file %s",
     this_class_index, CHECK_(nullHandle));
   Symbol*  class_name  = cp->unresolved_klass_at(this_class_index);
   assert(class_name != NULL, "class_name can't be null");
   // It's important to set parsed_name *before* resolving the super class.
   // (it's used for cleanup by the caller if parsing fails)
   parsed_name = class_name;
   // parsed_name is returned and can be used if there's an error, so add to
   // its reference count.  Caller will decrement the refcount.
   parsed_name->increment_refcount();
   // Update _class_name which could be null previously to be class_name
   _class_name = class_name;
   // Don't need to check whether this class name is legal or not.
   // It has been checked when constant pool is parsed.
   // However, make sure it is not an array type.
   if (_need_verify) {
     guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
                        "Bad class name in class file %s",
                        CHECK_(nullHandle));
   }
   Klass* preserve_this_klass;   // for storing result across HandleMark
   // release all handles when parsing is done
   { HandleMark hm(THREAD);
     // Checks if name in class file matches requested name
     if (name != NULL && class_name != name) {
       ResourceMark rm(THREAD);
       Exceptions::fthrow(
         THREAD_AND_LOCATION,
         vmSymbols::java_lang_NoClassDefFoundError(),
         "%s (wrong name: %s)",
         name->as_C_string(),
         class_name->as_C_string()
       );
       return nullHandle;
     }
     if (TraceClassLoadingPreorder) {
       tty->print("[Loading %s", (name != NULL) ? name->as_klass_external_name() : "NoName");
       if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
       tty->print_cr("]");
     }
     u2 super_class_index = cfs->get_u2_fast();
     instanceKlassHandle super_klass = parse_super_class(super_class_index,
                                                         CHECK_NULL);
     // Interfaces
     u2 itfs_len = cfs->get_u2_fast();
     Array<Klass*>* local_interfaces =
       parse_interfaces(itfs_len, protection_domain, _class_name,
                        &has_default_methods, CHECK_(nullHandle));
     u2 java_fields_count = 0;
     // Fields (offsets are filled in later)
     FieldAllocationCount fac;
     Array<u2>* fields = parse_fields(class_name,
                                      access_flags.is_interface(),
                                      &fac, &java_fields_count,
                                      CHECK_(nullHandle));
     // Methods
     bool has_final_method = false;
     AccessFlags promoted_flags;
     promoted_flags.set_flags(0);
     Array<Method*>* methods = parse_methods(access_flags.is_interface(),
                                             &promoted_flags,
                                             &has_final_method,
                                             &has_default_methods,
                                             CHECK_(nullHandle));
     // Additional attributes
     ClassAnnotationCollector parsed_annotations;
     parse_classfile_attributes(&parsed_annotations, CHECK_(nullHandle));
     // Make sure this is the end of class file stream
     guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
     // We check super class after class file is parsed and format is checked
     if (super_class_index > 0 && super_klass.is_null()) {
       Symbol*  sk  = cp->klass_name_at(super_class_index);
       if (access_flags.is_interface()) {
         // Before attempting to resolve the superclass, check for class format
         // errors not checked yet.
         guarantee_property(sk == vmSymbols::java_lang_Object(),
                            "Interfaces must have java.lang.Object as superclass in class file %s",
                            CHECK_(nullHandle));
       }
       Klass* k = SystemDictionary::resolve_super_or_fail(class_name, sk,
                                                          class_loader,
                                                          protection_domain,
                                                          true,
                                                          CHECK_(nullHandle));
       KlassHandle kh (THREAD, k);
       super_klass = instanceKlassHandle(THREAD, kh());
     }
     if (super_klass.not_null()) {
       if (super_klass->has_default_methods()) {
         has_default_methods = true;
       }
       if (super_klass->is_interface()) {
         ResourceMark rm(THREAD);
         Exceptions::fthrow(
           THREAD_AND_LOCATION,
           vmSymbols::java_lang_IncompatibleClassChangeError(),
           "class %s has interface %s as super class",
           class_name->as_klass_external_name(),
           super_klass->external_name()
         );
         return nullHandle;
       }
       // Make sure super class is not final
       if (super_klass->is_final()) {
         THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
       }
     }
     // save super klass for error handling.
     _super_klass = super_klass;
     // Compute the transitive list of all unique interfaces implemented by this class
     _transitive_interfaces =
           compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
     // sort methods
     intArray* method_ordering = sort_methods(methods);
     // promote flags from parse_methods() to the klass' flags
     access_flags.add_promoted_flags(promoted_flags.as_int());
     // Size of Java vtable (in words)
     int vtable_size = 0;
     int itable_size = 0;
     int num_miranda_methods = 0;
     GrowableArray<Method*> all_mirandas(20);
     klassVtable::compute_vtable_size_and_num_mirandas(
         &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods,
         access_flags, class_loader, class_name, local_interfaces,
                                                       CHECK_(nullHandle));
     // Size of Java itable (in words)
     itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(_transitive_interfaces);
     FieldLayoutInfo info;
     layout_fields(class_loader, &fac, &parsed_annotations, &info, CHECK_NULL);
     int total_oop_map_size2 =
           InstanceKlass::nonstatic_oop_map_size(info.total_oop_map_count);
     // Compute reference type
     ReferenceType rt;
     if (super_klass() == NULL) {
       rt = REF_NONE;
     } else {
       rt = super_klass->reference_type();
     }
     // We can now create the basic Klass* for this klass
     _klass = InstanceKlass::allocate_instance_klass(loader_data,
                                                     vtable_size,
                                                     itable_size,
                                                     info.static_field_size,
                                                     total_oop_map_size2,
                                                     rt,
                                                     access_flags,
                                                     name,
                                                     super_klass(),
                                                     !host_klass.is_null(),
                                                     CHECK_(nullHandle));
     instanceKlassHandle this_klass (THREAD, _klass);
     assert(this_klass->static_field_size() == info.static_field_size, "sanity");
     assert(this_klass->nonstatic_oop_map_count() == info.total_oop_map_count,
            "sanity");
     // Fill in information already parsed
     this_klass->set_should_verify_class(verify);
     jint lh = Klass::instance_layout_helper(info.instance_size, false);
     this_klass->set_layout_helper(lh);
     assert(this_klass->oop_is_instance(), "layout is correct");
     assert(this_klass->size_helper() == info.instance_size, "correct size_helper");
     // Not yet: supers are done below to support the new subtype-checking fields
     //this_klass->set_super(super_klass());
     this_klass->set_class_loader_data(loader_data);
     this_klass->set_nonstatic_field_size(info.nonstatic_field_size);
     this_klass->set_has_nonstatic_fields(info.has_nonstatic_fields);
     this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
     apply_parsed_class_metadata(this_klass, java_fields_count, CHECK_NULL);
     if (has_final_method) {
       this_klass->set_has_final_method();
     }
     this_klass->copy_method_ordering(method_ordering, CHECK_NULL);
     // The InstanceKlass::_methods_jmethod_ids cache and the
     // InstanceKlass::_methods_cached_itable_indices cache are
     // both managed on the assumption that the initial cache
     // size is equal to the number of methods in the class. If
     // that changes, then InstanceKlass::idnum_can_increment()
     // has to be changed accordingly.
     this_klass->set_initial_method_idnum(methods->length());
     this_klass->set_name(cp->klass_name_at(this_class_index));
     if (is_anonymous())  // I am well known to myself
       cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
     this_klass->set_minor_version(minor_version);
     this_klass->set_major_version(major_version);
     this_klass->set_has_default_methods(has_default_methods);
     // Set up Method*::intrinsic_id as soon as we know the names of methods.
     // (We used to do this lazily, but now we query it in Rewriter,
     // which is eagerly done for every method, so we might as well do it now,
     // when everything is fresh in memory.)
     if (Method::klass_id_for_intrinsics(this_klass()) != vmSymbols::NO_SID) {
       for (int j = 0; j < methods->length(); j++) {
         methods->at(j)->init_intrinsic_id();
       }
     }
     if (cached_class_file_bytes != NULL) {
       // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
       this_klass->set_cached_class_file(cached_class_file_bytes,
                                         cached_class_file_length);
     }
     // Fill in field values obtained by parse_classfile_attributes
     if (parsed_annotations.has_any_annotations())
       parsed_annotations.apply_to(this_klass);
     apply_parsed_class_attributes(this_klass);
     // Miranda methods
     if ((num_miranda_methods > 0) ||
         // if this class introduced new miranda methods or
         (super_klass.not_null() && (super_klass->has_miranda_methods()))
         // super class exists and this class inherited miranda methods
         ) {
       this_klass->set_has_miranda_methods(); // then set a flag
     }
     // Fill in information needed to compute superclasses.
     this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
     // Initialize itable offset tables
     klassItable::setup_itable_offset_table(this_klass);
     // Compute transitive closure of interfaces this class implements
     // Do final class setup
     fill_oop_maps(this_klass, info.nonstatic_oop_map_count, info.nonstatic_oop_offsets, info.nonstatic_oop_counts);
     // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
     set_precomputed_flags(this_klass);
     // reinitialize modifiers, using the InnerClasses attribute
     int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
     this_klass->set_modifier_flags(computed_modifiers);
     // check if this class can access its super class
     check_super_class_access(this_klass, CHECK_(nullHandle));
     // check if this class can access its superinterfaces
     check_super_interface_access(this_klass, CHECK_(nullHandle));
     // check if this class overrides any final method
     check_final_method_override(this_klass, CHECK_(nullHandle));
     // check that if this class is an interface then it doesn't have static methods
     if (this_klass->is_interface()) {
       /* An interface in a JAVA 8 classfile can be static */
       if (_major_version < JAVA_8_VERSION) {
         check_illegal_static_method(this_klass, CHECK_(nullHandle));
       }
     }
     // Allocate mirror and initialize static fields
     java_lang_Class::create_mirror(this_klass, protection_domain, CHECK_(nullHandle));
 #ifdef ASSERT
     if (ParseAllGenericSignatures) {
       parseAndPrintGenericSignatures(this_klass, CHECK_(nullHandle));
     }
 #endif
     // Generate any default methods - default methods are interface methods
     // that have a default implementation.  This is new with Lambda project.
     if (has_default_methods && !access_flags.is_interface() &&
         local_interfaces->length() > 0) {
       DefaultMethods::generate_default_methods(
           this_klass(), &all_mirandas, CHECK_(nullHandle));
     }
     // Update the loader_data graph.
     record_defined_class_dependencies(this_klass, CHECK_NULL);
     ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
                                              false /* not shared class */);
     if (TraceClassLoading) {
       ResourceMark rm;
       // print in a single call to reduce interleaving of output
       if (cfs->source() != NULL) {
         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
                    cfs->source());
       } else if (class_loader.is_null()) {
         if (THREAD->is_Java_thread()) {
           Klass* caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
           tty->print("[Loaded %s by instance of %s]\n",
                      this_klass->external_name(),
                      InstanceKlass::cast(caller)->external_name());
         } else {
           tty->print("[Loaded %s]\n", this_klass->external_name());
         }
       } else {
         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
                    InstanceKlass::cast(class_loader->klass())->external_name());
       }
     }
     if (TraceClassResolution) {
       ResourceMark rm;
       // print out the superclass.
       const char * from = this_klass()->external_name();
       if (this_klass->java_super() != NULL) {
         tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name());
       }
       // print out each of the interface classes referred to by this class.
       Array<Klass*>* local_interfaces = this_klass->local_interfaces();
       if (local_interfaces != NULL) {
         int length = local_interfaces->length();
         for (int i = 0; i < length; i++) {
           Klass* k = local_interfaces->at(i);
           InstanceKlass* to_class = InstanceKlass::cast(k);
           const char * to = to_class->external_name();
           tty->print("RESOLVE %s %s (interface)\n", from, to);
         }
       }
     }
     // preserve result across HandleMark
     preserve_this_klass = this_klass();
   }
   // Create new handle outside HandleMark (might be needed for
   // Extended Class Redefinition)
   instanceKlassHandle this_klass (THREAD, preserve_this_klass);
   debug_only(this_klass->verify();)
   // Clear class if no error has occurred so destructor doesn't deallocate it
   _klass = NULL;
   return this_klass;
 }
 // Destructor to clean up if there's an error
 ClassFileParser::~ClassFileParser() {
   MetadataFactory::free_metadata(_loader_data, _cp);
   MetadataFactory::free_array<u2>(_loader_data, _fields);
   // Free methods
   InstanceKlass::deallocate_methods(_loader_data, _methods);
   // beware of the Universe::empty_blah_array!!
   if (_inner_classes != Universe::the_empty_short_array()) {
     MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
   }
   // Free interfaces
   InstanceKlass::deallocate_interfaces(_loader_data, _super_klass(),
                                        _local_interfaces, _transitive_interfaces);
   MetadataFactory::free_array<u1>(_loader_data, _annotations);
   MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
   Annotations::free_contents(_loader_data, _fields_annotations);
   Annotations::free_contents(_loader_data, _fields_type_annotations);
   clear_class_metadata();
   // deallocate the klass if already created.
   MetadataFactory::free_metadata(_loader_data, _klass);
   _klass = NULL;
 }
 void ClassFileParser::print_field_layout(Symbol* name,
                                          Array<u2>* fields,
                                          constantPoolHandle cp,
                                          int instance_size,
                                          int instance_fields_start,
                                          int instance_fields_end,
                                          int static_fields_end) {
   tty->print("%s: field layout\n", name->as_klass_external_name());
   tty->print("  @%3d %s\n", instance_fields_start, "--- instance fields start ---");
   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
     if (!fs.access_flags().is_static()) {
       tty->print("  @%3d \"%s\" %s\n",
           fs.offset(),
           fs.name()->as_klass_external_name(),
           fs.signature()->as_klass_external_name());
     }
   }
   tty->print("  @%3d %s\n", instance_fields_end, "--- instance fields end ---");
   tty->print("  @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
   tty->print("  @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
   for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
     if (fs.access_flags().is_static()) {
       tty->print("  @%3d \"%s\" %s\n",
           fs.offset(),
           fs.name()->as_klass_external_name(),
           fs.signature()->as_klass_external_name());
     }
   }
   tty->print("  @%3d %s\n", static_fields_end, "--- static fields end ---");
   tty->print("\n");
 }
 unsigned int
 ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
                                        unsigned int nonstatic_oop_map_count,
                                        int first_nonstatic_oop_offset) {
   unsigned int map_count =
     super.is_null() ? 0 : super->nonstatic_oop_map_count();
   if (nonstatic_oop_map_count > 0) {
     // We have oops to add to map
     if (map_count == 0) {
       map_count = nonstatic_oop_map_count;
     } else {
       // Check whether we should add a new map block or whether the last one can
       // be extended
       OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
       OopMapBlock* const last_map = first_map + map_count - 1;
       int next_offset = last_map->offset() + last_map->count() * heapOopSize;
       if (next_offset == first_nonstatic_oop_offset) {
         // There is no gap bettwen superklass's last oop field and first
         // local oop field, merge maps.
         nonstatic_oop_map_count -= 1;
       } else {
         // Superklass didn't end with a oop field, add extra maps
         assert(next_offset < first_nonstatic_oop_offset, "just checking");
       }
       map_count += nonstatic_oop_map_count;
     }
   }
   return map_count;
 }
 void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
                                     unsigned int nonstatic_oop_map_count,
                                     int* nonstatic_oop_offsets,
                                     unsigned int* nonstatic_oop_counts) {
   OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
   const InstanceKlass* const super = k->superklass();
   const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
   if (super_count > 0) {
     // Copy maps from superklass
     OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
     for (unsigned int i = 0; i < super_count; ++i) {
       *this_oop_map++ = *super_oop_map++;
     }
   }
   if (nonstatic_oop_map_count > 0) {
     if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
       // The counts differ because there is no gap between superklass's last oop
       // field and the first local oop field.  Extend the last oop map copied
       // from the superklass instead of creating new one.
       nonstatic_oop_map_count--;
       nonstatic_oop_offsets++;
       this_oop_map--;
       this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
       this_oop_map++;
     }
     // Add new map blocks, fill them
     while (nonstatic_oop_map_count-- > 0) {
       this_oop_map->set_offset(*nonstatic_oop_offsets++);
       this_oop_map->set_count(*nonstatic_oop_counts++);
       this_oop_map++;
     }
     assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
            this_oop_map, "sanity");
   }
 }
 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
   Klass* super = k->super();
   // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
   // in which case we don't have to register objects as finalizable
   if (!_has_empty_finalizer) {
     if (_has_finalizer ||
         (super != NULL && super->has_finalizer())) {
       k->set_has_finalizer();
     }
   }
 #ifdef ASSERT
   bool f = false;
   Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
                                  vmSymbols::void_method_signature());
   if (m != NULL && !m->is_empty_method()) {
     f = true;
   }
   assert(f == k->has_finalizer(), "inconsistent has_finalizer");
 #endif
   // Check if this klass supports the java.lang.Cloneable interface
   if (SystemDictionary::Cloneable_klass_loaded()) {
     if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) {
       k->set_is_cloneable();
     }
   }
   // Check if this klass has a vanilla default constructor
   if (super == NULL) {
     // java.lang.Object has empty default constructor
     k->set_has_vanilla_constructor();
   } else {
     if (super->has_vanilla_constructor() &&
         _has_vanilla_constructor) {
       k->set_has_vanilla_constructor();
     }
 #ifdef ASSERT
     bool v = false;
     if (super->has_vanilla_constructor()) {
       Method* constructor = k->find_method(vmSymbols::object_initializer_name(
 ), vmSymbols::void_method_signature());
       if (constructor != NULL && constructor->is_vanilla_constructor()) {
         v = true;
       }
     }
     assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
 #endif
   }
   // If it cannot be fast-path allocated, set a bit in the layout helper.
   // See documentation of InstanceKlass::can_be_fastpath_allocated().
   assert(k->size_helper() > 0, "layout_helper is initialized");
   if ((!RegisterFinalizersAtInit && k->has_finalizer())
       || k->is_abstract() || k->is_interface()
       || (k->name() == vmSymbols::java_lang_Class() && k->class_loader() == NULL)
       || k->size_helper() >= FastAllocateSizeLimit) {
     // Forbid fast-path allocation.
     jint lh = Klass::instance_layout_helper(k->size_helper(), true);
     k->set_layout_helper(lh);
   }
 }
 // Attach super classes and interface classes to class loader data
 void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
   ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
   if (defining_loader_data->is_the_null_class_loader_data()) {
       // Dependencies to null class loader data are implicit.
       return;
   } else {
     // add super class dependency
     Klass* super = defined_klass->super();
     if (super != NULL) {
       defining_loader_data->record_dependency(super, CHECK);
     }
     // add super interface dependencies
     Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
     if (local_interfaces != NULL) {
       int length = local_interfaces->length();
       for (int i = 0; i < length; i++) {
         defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
       }
     }
   }
 }
 // utility methods for appending an array with check for duplicates
 void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
   // iterate over new interfaces
   for (int i = 0; i < ifs->length(); i++) {
     Klass* e = ifs->at(i);
     assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
     // add new interface
     result->append_if_missing(e);
   }
 }
 Array<Klass*>* ClassFileParser::compute_transitive_interfaces(
                                         instanceKlassHandle super,
                                         Array<Klass*>* local_ifs, TRAPS) {
   // Compute maximum size for transitive interfaces
   int max_transitive_size = 0;
   int super_size = 0;
   // Add superclass transitive interfaces size
   if (super.not_null()) {
     super_size = super->transitive_interfaces()->length();
     max_transitive_size += super_size;
   }
   // Add local interfaces' super interfaces
   int local_size = local_ifs->length();
   for (int i = 0; i < local_size; i++) {
     Klass* l = local_ifs->at(i);
     max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
   }
   // Finally add local interfaces
   max_transitive_size += local_size;
   // Construct array
   if (max_transitive_size == 0) {
     // no interfaces, use canonicalized array
     return Universe::the_empty_klass_array();
   } else if (max_transitive_size == super_size) {
     // no new local interfaces added, share superklass' transitive interface array
     return super->transitive_interfaces();
   } else if (max_transitive_size == local_size) {
     // only local interfaces added, share local interface array
     return local_ifs;
   } else {
     ResourceMark rm;
     GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
     // Copy down from superclass
     if (super.not_null()) {
       append_interfaces(result, super->transitive_interfaces());
     }
     // Copy down from local interfaces' superinterfaces
     for (int i = 0; i < local_ifs->length(); i++) {
       Klass* l = local_ifs->at(i);
       append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
     }
     // Finally add local interfaces
     append_interfaces(result, local_ifs);
     // length will be less than the max_transitive_size if duplicates were removed
     int length = result->length();
     assert(length <= max_transitive_size, "just checking");
     Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(_loader_data, length, CHECK_NULL);
     for (int i = 0; i < length; i++) {
       Klass* e = result->at(i);
         assert(e != NULL, "just checking");
       new_result->at_put(i, e);
     }
     return new_result;
   }
 }
 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
   Klass* super = this_klass->super();
   if ((super != NULL) &&
       (!Reflection::verify_class_access(this_klass(), super, false))) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_IllegalAccessError(),
       "class %s cannot access its superclass %s",
       this_klass->external_name(),
       InstanceKlass::cast(super)->external_name()
     );
     return;
   }
 }
 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
   Array<Klass*>* local_interfaces = this_klass->local_interfaces();
   int lng = local_interfaces->length();
   for (int i = lng - 1; i >= 0; i--) {
     Klass* k = local_interfaces->at(i);
     assert (k != NULL && k->is_interface(), "invalid interface");
     if (!Reflection::verify_class_access(this_klass(), k, false)) {
       ResourceMark rm(THREAD);
       Exceptions::fthrow(
         THREAD_AND_LOCATION,
         vmSymbols::java_lang_IllegalAccessError(),
         "class %s cannot access its superinterface %s",
         this_klass->external_name(),
         InstanceKlass::cast(k)->external_name()
       );
       return;
     }
   }
 }
 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
   Array<Method*>* methods = this_klass->methods();
   int num_methods = methods->length();
   // go thru each method and check if it overrides a final method
   for (int index = 0; index < num_methods; index++) {
     Method* m = methods->at(index);
     // skip static and <init> methods
     if ((!m->is_static()) &&
         (m->name() != vmSymbols::object_initializer_name())) {
       Symbol* name = m->name();
       Symbol* signature = m->signature();
       Klass* k = this_klass->super();
       Method* super_m = NULL;
       while (k != NULL) {
         // skip supers that don't have final methods.
         if (k->has_final_method()) {
           // lookup a matching method in the super class hierarchy
           super_m = InstanceKlass::cast(k)->lookup_method(name, signature);
           if (super_m == NULL) {
             break; // didn't find any match; get out
           }
           if (super_m->is_final() &&
               // matching method in super is final
               (Reflection::verify_field_access(this_klass(),
                                                super_m->method_holder(),
                                                super_m->method_holder(),
                                                super_m->access_flags(), false))
             // this class can access super final method and therefore override
             ) {
             ResourceMark rm(THREAD);
             Exceptions::fthrow(
               THREAD_AND_LOCATION,
               vmSymbols::java_lang_VerifyError(),
               "class %s overrides final method %s.%s",
               this_klass->external_name(),
               name->as_C_string(),
               signature->as_C_string()
             );
             return;
           }
           // continue to look from super_m's holder's super.
           k = super_m->method_holder()->super();
           continue;
         }
         k = k->super();
       }
     }
   }
 }
 // assumes that this_klass is an interface
 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
   assert(this_klass->is_interface(), "not an interface");
   Array<Method*>* methods = this_klass->methods();
   int num_methods = methods->length();
   for (int index = 0; index < num_methods; index++) {
     Method* m = methods->at(index);
     // if m is static and not the init method, throw a verify error
     if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
       ResourceMark rm(THREAD);
       Exceptions::fthrow(
         THREAD_AND_LOCATION,
         vmSymbols::java_lang_VerifyError(),
         "Illegal static method %s in interface %s",
         m->name()->as_C_string(),
         this_klass->external_name()
       );
       return;
     }
   }
 }
 // utility methods for format checking
 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
   if (!_need_verify) { return; }
   const bool is_interface  = (flags & JVM_ACC_INTERFACE)  != 0;
   const bool is_abstract   = (flags & JVM_ACC_ABSTRACT)   != 0;
   const bool is_final      = (flags & JVM_ACC_FINAL)      != 0;
   const bool is_super      = (flags & JVM_ACC_SUPER)      != 0;
   const bool is_enum       = (flags & JVM_ACC_ENUM)       != 0;
   const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
   const bool major_gte_15  = _major_version >= JAVA_1_5_VERSION;
   if ((is_abstract && is_final) ||
       (is_interface && !is_abstract) ||
       (is_interface && major_gte_15 && (is_super || is_enum)) ||
       (!is_interface && major_gte_15 && is_annotation)) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_ClassFormatError(),
       "Illegal class modifiers in class %s: 0x%X",
       _class_name->as_C_string(), flags
     );
     return;
   }
 }
 bool ClassFileParser::has_illegal_visibility(jint flags) {
   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
   return ((is_public && is_protected) ||
           (is_public && is_private) ||
           (is_protected && is_private));
 }
 bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
   u2 max_version =
     JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION :
     (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION);
   return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
          (major <= max_version) &&
          ((major != max_version) ||
           (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
 }
 void ClassFileParser::verify_legal_field_modifiers(
     jint flags, bool is_interface, TRAPS) {
   if (!_need_verify) { return; }
   const bool is_public    = (flags & JVM_ACC_PUBLIC)    != 0;
   const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
   const bool is_private   = (flags & JVM_ACC_PRIVATE)   != 0;
   const bool is_static    = (flags & JVM_ACC_STATIC)    != 0;
   const bool is_final     = (flags & JVM_ACC_FINAL)     != 0;
   const bool is_volatile  = (flags & JVM_ACC_VOLATILE)  != 0;
   const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
   const bool is_enum      = (flags & JVM_ACC_ENUM)      != 0;
   const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
   bool is_illegal = false;
   if (is_interface) {
     if (!is_public || !is_static || !is_final || is_private ||
         is_protected || is_volatile || is_transient ||
         (major_gte_15 && is_enum)) {
       is_illegal = true;
     }
   } else { // not interface
     if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
       is_illegal = true;
     }
   }
   if (is_illegal) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_ClassFormatError(),
       "Illegal field modifiers in class %s: 0x%X",
       _class_name->as_C_string(), flags);
     return;
   }
 }
 void ClassFileParser::verify_legal_method_modifiers(
     jint flags, bool is_interface, Symbol* name, TRAPS) {
   if (!_need_verify) { return; }
   const bool is_public       = (flags & JVM_ACC_PUBLIC)       != 0;
   const bool is_private      = (flags & JVM_ACC_PRIVATE)      != 0;
   const bool is_static       = (flags & JVM_ACC_STATIC)       != 0;
   const bool is_final        = (flags & JVM_ACC_FINAL)        != 0;
   const bool is_native       = (flags & JVM_ACC_NATIVE)       != 0;
   const bool is_abstract     = (flags & JVM_ACC_ABSTRACT)     != 0;
   const bool is_bridge       = (flags & JVM_ACC_BRIDGE)       != 0;
   const bool is_strict       = (flags & JVM_ACC_STRICT)       != 0;
   const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
   const bool is_protected    = (flags & JVM_ACC_PROTECTED)    != 0;
   const bool major_gte_15    = _major_version >= JAVA_1_5_VERSION;
   const bool major_gte_8     = _major_version >= JAVA_8_VERSION;
   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
   bool is_illegal = false;
   if (is_interface) {
     if (major_gte_8) {
       // Class file version is JAVA_8_VERSION or later Methods of
       // interfaces may set any of the flags except ACC_PROTECTED,
       // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
       // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
       if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
           (is_native || is_protected || is_final || is_synchronized) ||
           // If a specific method of a class or interface has its
           // ACC_ABSTRACT flag set, it must not have any of its
           // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
           // ACC_STRICT, or ACC_SYNCHRONIZED flags set.  No need to
           // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
           // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
           (is_abstract && (is_private || is_static || is_strict))) {
         is_illegal = true;
       }
     } else if (major_gte_15) {
       // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
       if (!is_public || is_static || is_final || is_synchronized ||
           is_native || !is_abstract || is_strict) {
         is_illegal = true;
       }
     } else {
       // Class file version is pre-JAVA_1_5_VERSION
       if (!is_public || is_static || is_final || is_native || !is_abstract) {
         is_illegal = true;
       }
     }
   } else { // not interface
     if (is_initializer) {
       if (is_static || is_final || is_synchronized || is_native ||
           is_abstract || (major_gte_15 && is_bridge)) {
         is_illegal = true;
       }
     } else { // not initializer
       if (is_abstract) {
         if ((is_final || is_native || is_private || is_static ||
             (major_gte_15 && (is_synchronized || is_strict)))) {
           is_illegal = true;
         }
       }
       if (has_illegal_visibility(flags)) {
         is_illegal = true;
       }
     }
   }
   if (is_illegal) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_ClassFormatError(),
       "Method %s in class %s has illegal modifiers: 0x%X",
       name->as_C_string(), _class_name->as_C_string(), flags);
     return;
   }
 }
 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
   assert(_need_verify, "only called when _need_verify is true");
   int i = 0;
   int count = length >> 2;
   for (int k=0; k<count; k++) {
     unsigned char b0 = buffer[i];
     unsigned char b1 = buffer[i+1];
     unsigned char b2 = buffer[i+2];
     unsigned char b3 = buffer[i+3];
     // For an unsigned char v,
     // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
     // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
     unsigned char res = b0 | b0 - 1 |
                         b1 | b1 - 1 |
                         b2 | b2 - 1 |
                         b3 | b3 - 1;
     if (res >= 128) break;
     i += 4;
   }
   for(; i < length; i++) {
     unsigned short c;
     // no embedded zeros
     guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
     if(buffer[i] < 128) {
       continue;
     }
     if ((i + 5) < length) { // see if it's legal supplementary character
       if (UTF8::is_supplementary_character(&buffer[i])) {
         c = UTF8::get_supplementary_character(&buffer[i]);
         i += 5;
         continue;
       }
     }
     switch (buffer[i] >> 4) {
       default: break;
       case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
       case 0xC: case 0xD:  // 110xxxxx  10xxxxxx
         c = (buffer[i] & 0x1F) << 6;
         i++;
         if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
           c += buffer[i] & 0x3F;
           if (_major_version <= 47 || c == 0 || c >= 0x80) {
             // for classes with major > 47, c must a null or a character in its shortest form
             break;
           }
         }
         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
       case 0xE:  // 1110xxxx 10xxxxxx 10xxxxxx
         c = (buffer[i] & 0xF) << 12;
         i += 2;
         if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
           c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
           if (_major_version <= 47 || c >= 0x800) {
             // for classes with major > 47, c must be in its shortest form
             break;
           }
         }
         classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
     }  // end of switch
   } // end of for
 }
 // Checks if name is a legal class name.
 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) {
   if (!_need_verify || _relax_verify) { return; }
   char buf[fixed_buffer_size];
   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
   unsigned int length = name->utf8_length();
   bool legal = false;
   if (length > 0) {
     char* p;
     if (bytes[0] == JVM_SIGNATURE_ARRAY) {
       p = skip_over_field_signature(bytes, false, length, CHECK);
       legal = (p != NULL) && ((p - bytes) == (int)length);
     } else if (_major_version < JAVA_1_5_VERSION) {
       if (bytes[0] != '<') {
         p = skip_over_field_name(bytes, true, length);
         legal = (p != NULL) && ((p - bytes) == (int)length);
       }
     } else {
       // 4900761: relax the constraints based on JSR202 spec
       // Class names may be drawn from the entire Unicode character set.
       // Identifiers between '/' must be unqualified names.
       // The utf8 string has been verified when parsing cpool entries.
       legal = verify_unqualified_name(bytes, length, LegalClass);
     }
   }
   if (!legal) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_ClassFormatError(),
       "Illegal class name \"%s\" in class file %s", bytes,
       _class_name->as_C_string()
     );
     return;
   }
 }
 // Checks if name is a legal field name.
 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) {
   if (!_need_verify || _relax_verify) { return; }
   char buf[fixed_buffer_size];
   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
   unsigned int length = name->utf8_length();
   bool legal = false;
   if (length > 0) {
     if (_major_version < JAVA_1_5_VERSION) {
       if (bytes[0] != '<') {
         char* p = skip_over_field_name(bytes, false, length);
         legal = (p != NULL) && ((p - bytes) == (int)length);
       }
     } else {
       // 4881221: relax the constraints based on JSR202 spec
       legal = verify_unqualified_name(bytes, length, LegalField);
     }
   }
   if (!legal) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_ClassFormatError(),
       "Illegal field name \"%s\" in class %s", bytes,
       _class_name->as_C_string()
     );
     return;
   }
 }
 // Checks if name is a legal method name.
 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) {
   if (!_need_verify || _relax_verify) { return; }
   assert(name != NULL, "method name is null");
   char buf[fixed_buffer_size];
   char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
   unsigned int length = name->utf8_length();
   bool legal = false;
   if (length > 0) {
     if (bytes[0] == '<') {
       if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
         legal = true;
       }
     } else if (_major_version < JAVA_1_5_VERSION) {
       char* p;
       p = skip_over_field_name(bytes, false, length);
       legal = (p != NULL) && ((p - bytes) == (int)length);
     } else {
       // 4881221: relax the constraints based on JSR202 spec
       legal = verify_unqualified_name(bytes, length, LegalMethod);
     }
   }
   if (!legal) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_ClassFormatError(),
       "Illegal method name \"%s\" in class %s", bytes,
       _class_name->as_C_string()
     );
     return;
   }
 }
 // Checks if signature is a legal field signature.
 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) {
   if (!_need_verify) { return; }
   char buf[fixed_buffer_size];
   char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
   unsigned int length = signature->utf8_length();
   char* p = skip_over_field_signature(bytes, false, length, CHECK);
   if (p == NULL || (p - bytes) != (int)length) {
     throwIllegalSignature("Field", name, signature, CHECK);
   }
 }
 // Checks if signature is a legal method signature.
 // Returns number of parameters
 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) {
   if (!_need_verify) {
     // make sure caller's args_size will be less than 0 even for non-static
     // method so it will be recomputed in compute_size_of_parameters().
     return -2;
   }
   unsigned int args_size = 0;
   char buf[fixed_buffer_size];
   char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
   unsigned int length = signature->utf8_length();
   char* nextp;
   // The first character must be a '('
   if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
     length--;
     // Skip over legal field signatures
     nextp = skip_over_field_signature(p, false, length, CHECK_0);
     while ((length > 0) && (nextp != NULL)) {
       args_size++;
       if (p[0] == 'J' || p[0] == 'D') {
         args_size++;
       }
       length -= nextp - p;
       p = nextp;
       nextp = skip_over_field_signature(p, false, length, CHECK_0);
     }
     // The first non-signature thing better be a ')'
     if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
       length--;
       if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
         // All internal methods must return void
         if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
           return args_size;
         }
       } else {
         // Now we better just have a return value
         nextp = skip_over_field_signature(p, true, length, CHECK_0);
         if (nextp && ((int)length == (nextp - p))) {
           return args_size;
         }
       }
     }
   }
   // Report error
   throwIllegalSignature("Method", name, signature, CHECK_0);
   return 0;
 }
 // Unqualified names may not contain the characters '.', ';', '[', or '/'.
 // Method names also may not contain the characters '<' or '>', unless <init>
 // or <clinit>.  Note that method names may not be <init> or <clinit> in this
 // method.  Because these names have been checked as special cases before
 // calling this method in verify_legal_method_name.
 bool ClassFileParser::verify_unqualified_name(
     char* name, unsigned int length, int type) {
   jchar ch;
   for (char* p = name; p != name + length; ) {
     ch = *p;
     if (ch < 128) {
       p++;
       if (ch == '.' || ch == ';' || ch == '[' ) {
         return false;   // do not permit '.', ';', or '['
       }
       if (type != LegalClass && ch == '/') {
         return false;   // do not permit '/' unless it's class name
       }
       if (type == LegalMethod && (ch == '<' || ch == '>')) {
         return false;   // do not permit '<' or '>' in method names
       }
     } else {
       char* tmp_p = UTF8::next(p, &ch);
       p = tmp_p;
     }
   }
   return true;
 }
 // Take pointer to a string. Skip over the longest part of the string that could
 // be taken as a fieldname. Allow '/' if slash_ok is true.
 // Return a pointer to just past the fieldname.
 // Return NULL if no fieldname at all was found, or in the case of slash_ok
 // being true, we saw consecutive slashes (meaning we were looking for a
 // qualified path but found something that was badly-formed).
 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
   char* p;
   jchar ch;
   jboolean last_is_slash = false;
   jboolean not_first_ch = false;
   for (p = name; p != name + length; not_first_ch = true) {
     char* old_p = p;
     ch = *p;
     if (ch < 128) {
       p++;
       // quick check for ascii
       if ((ch >= 'a' && ch <= 'z') ||
           (ch >= 'A' && ch <= 'Z') ||
           (ch == '_' || ch == '$') ||
           (not_first_ch && ch >= '0' && ch <= '9')) {
         last_is_slash = false;
         continue;
       }
       if (slash_ok && ch == '/') {
         if (last_is_slash) {
           return NULL;  // Don't permit consecutive slashes
         }
         last_is_slash = true;
         continue;
       }
     } else {
       jint unicode_ch;
       char* tmp_p = UTF8::next_character(p, &unicode_ch);
       p = tmp_p;
       last_is_slash = false;
       // Check if ch is Java identifier start or is Java identifier part
       // 4672820: call java.lang.Character methods directly without generating separate tables.
       EXCEPTION_MARK;
       instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass());
       // return value
       JavaValue result(T_BOOLEAN);
       // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
       JavaCallArguments args;
       args.push_int(unicode_ch);
       // public static boolean isJavaIdentifierStart(char ch);
       JavaCalls::call_static(&result,
                              klass,
                              vmSymbols::isJavaIdentifierStart_name(),
                              vmSymbols::int_bool_signature(),
                              &args,
                              THREAD);
       if (HAS_PENDING_EXCEPTION) {
         CLEAR_PENDING_EXCEPTION;
         return 0;
       }
       if (result.get_jboolean()) {
         continue;
       }
       if (not_first_ch) {
         // public static boolean isJavaIdentifierPart(char ch);
         JavaCalls::call_static(&result,
                                klass,
                                vmSymbols::isJavaIdentifierPart_name(),
                                vmSymbols::int_bool_signature(),
                                &args,
                                THREAD);
         if (HAS_PENDING_EXCEPTION) {
           CLEAR_PENDING_EXCEPTION;
           return 0;
         }
         if (result.get_jboolean()) {
           continue;
         }
       }
     }
     return (not_first_ch) ? old_p : NULL;
   }
   return (not_first_ch) ? p : NULL;
 }
 // Take pointer to a string. Skip over the longest part of the string that could
 // be taken as a field signature. Allow "void" if void_ok.
 // Return a pointer to just past the signature.
 // Return NULL if no legal signature is found.
 char* ClassFileParser::skip_over_field_signature(char* signature,
                                                  bool void_ok,
                                                  unsigned int length,
                                                  TRAPS) {
   unsigned int array_dim = 0;
   while (length > 0) {
     switch (signature[0]) {
       case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
       case JVM_SIGNATURE_BOOLEAN:
       case JVM_SIGNATURE_BYTE:
       case JVM_SIGNATURE_CHAR:
       case JVM_SIGNATURE_SHORT:
       case JVM_SIGNATURE_INT:
       case JVM_SIGNATURE_FLOAT:
       case JVM_SIGNATURE_LONG:
       case JVM_SIGNATURE_DOUBLE:
         return signature + 1;
       case JVM_SIGNATURE_CLASS: {
         if (_major_version < JAVA_1_5_VERSION) {
           // Skip over the class name if one is there
           char* p = skip_over_field_name(signature + 1, true, --length);
           // The next character better be a semicolon
           if (p && (p - signature) > 1 && p[0] == ';') {
             return p + 1;
           }
         } else {
           // 4900761: For class version > 48, any unicode is allowed in class name.
           length--;
           signature++;
           while (length > 0 && signature[0] != ';') {
             if (signature[0] == '.') {
               classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
             }
             length--;
             signature++;
           }
           if (signature[0] == ';') { return signature + 1; }
         }
         return NULL;
       }
       case JVM_SIGNATURE_ARRAY:
         array_dim++;
         if (array_dim > 255) {
           // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
           classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
         }
         // The rest of what's there better be a legal signature
         signature++;
         length--;
         void_ok = false;
         break;
       default:
         return NULL;
     }
   }
   return NULL;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/classfile/classFileParser.cpp@5c599c419c1d (annotated)

src/share/vm/classfile/classFileParser.cpp