jdk8-mips64-public/hotspot: src/share/vm/classfile/classFileParser.cpp@ef3c5db0b3ae (annotated)

src/share/vm/classfile/classFileParser.cpp@ef3c5db0b3ae (annotated)

src/share/vm/classfile/classFileParser.cpp

Tue, 21 Dec 2010 04:37:30 -0800

author: twisti
date: Tue, 21 Dec 2010 04:37:30 -0800
changeset 2408: ef3c5db0b3ae
parent 2353: dad31fc330cd
child 2497: 3582bf76420e
permissions: -rw-r--r--

7008165: Garbage in ClassFormatError message
Summary: When bootstrap_method_ref in BootstrapMethods attribute points to a wrong CP entry (non-MethodHandle), JVM throws ClassFormatError with a message, where method index and class file name is garbage.
Reviewed-by: iveresov

 /*
  * Copyright (c) 1997, 2010, 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/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/oopFactory.hpp"
 #include "memory/universe.inline.hpp"
 #include "oops/constantPoolOop.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/klass.inline.hpp"
 #include "oops/klassOop.hpp"
 #include "oops/klassVtable.hpp"
 #include "oops/methodOop.hpp"
 #include "oops/symbolOop.hpp"
 #include "prims/jvmtiExport.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"
 // 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        51
 #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
 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, 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
   // 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 (!EnableMethodHandles ||
             _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
           classfile_parse_error(
             (!EnableMethodHandles ?
              "This JVM does not support constant tag %u in class file %s" :
              "Class file version 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_InvokeDynamicTrans :  // this tag appears only in old classfiles
       case JVM_CONSTANT_InvokeDynamic :
         {
           if (!EnableInvokeDynamic ||
               _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
             classfile_parse_error(
               (!EnableInvokeDynamic ?
                "This JVM does not support constant tag %u in class file %s" :
                "Class file version 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 (tag == JVM_CONSTANT_InvokeDynamicTrans) {
             if (!AllowTransitionalJSR292)
               classfile_parse_error(
                 "This JVM does not support transitional InvokeDynamic tag %u in class file %s",
                 tag, CHECK);
             cp->invoke_dynamic_trans_at_put(index, bootstrap_specifier_index, name_and_type_index);
             break;
           }
           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 (AnonymousClasses && 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;
           symbolOop 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) {
               oopFactory::new_symbols(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) {
     oopFactory::new_symbols(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); }
 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));
   constantPoolOop constant_pool =
                       oopFactory::new_constantPool(length,
                                                    methodOopDesc::IsSafeConc,
                                                    CHECK_(nullHandle));
   constantPoolHandle cp (THREAD, constant_pool);
   cp->set_partially_loaded();    // Enables heap verify to work on partial constantPoolOops
   // parsing constant pool entries
   parse_constant_pool_entries(cp, 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_cp_range(klass_ref_index, length) &&
                        is_klass_reference(cp, 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_cp_range(name_ref_index, length) &&
             cp->tag_at(name_ref_index).is_utf8(),
           "Invalid constant pool index %u in class file %s",
           name_ref_index, CHECK_(nullHandle));
         check_property(
           valid_cp_range(signature_ref_index, length) &&
             cp->tag_at(signature_ref_index).is_utf8(),
           "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_cp_range(class_index, length) &&
               cp->tag_at(class_index).is_utf8(),
             "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_UnresolvedString :
         ShouldNotReachHere();     // Only JVM_CONSTANT_StringIndex should be present
         break;
       case JVM_CONSTANT_StringIndex :
         {
           int string_index = cp->string_index_at(index);
           check_property(
             valid_cp_range(string_index, length) &&
               cp->tag_at(string_index).is_utf8(),
             "Invalid constant pool index %u in class file %s",
             string_index, CHECK_(nullHandle));
           symbolOop 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) &&
                 EnableMethodHandles,
               "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_invokeStatic:
           case JVM_REF_invokeSpecial:
           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_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_cp_range(ref_index, length) &&
                 cp->tag_at(ref_index).is_utf8() &&
                 EnableMethodHandles,
               "Invalid constant pool index %u in class file %s",
               ref_index, CHECK_(nullHandle));
         }
         break;
       case JVM_CONSTANT_InvokeDynamicTrans :
       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));
           if (tag == JVM_CONSTANT_InvokeDynamicTrans) {
             int bootstrap_method_ref_index = cp->invoke_dynamic_bootstrap_method_ref_index_at(index);
             check_property(valid_cp_range(bootstrap_method_ref_index, length) &&
                            cp->tag_at(bootstrap_method_ref_index).is_method_handle(),
                            "Invalid constant pool index %u in class file %s",
                            bootstrap_method_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(AnonymousClasses, "");
     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));
       }
     }
     // Ensure that all the patches have been used.
     for (index = 0; index < _cp_patches->length(); index++) {
       guarantee_property(!has_cp_patch_at(index),
                          "Unused constant pool patch at %d in class file %s",
                          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: {
         symbolHandle class_name(THREAD, 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);
           symbolHandle name(THREAD, cp->symbol_at(name_index));
           symbolHandle sig(THREAD, 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_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);
         symbolHandle name(THREAD, cp->symbol_at(name_ref_index));
         symbolHandle signature(THREAD, 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.is_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);
             symbolHandle name(THREAD, 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: {
         symbolHandle no_name = vmSymbolHandles::type_name(); // place holder
         symbolHandle signature(THREAD, cp->method_type_signature_at(index));
         verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
         break;
       }
     }  // end of switch
   }  // end of for
   return cp;
 }
 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
   assert(AnonymousClasses, "");
   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_klassOop(patch()));
     } else {
       guarantee_property(java_lang_String::is_instance(patch()),
                          "Illegal class patch at %d in class file %s",
                          index, CHECK);
       symbolHandle name = java_lang_String::as_symbol(patch(), CHECK);
       cp->unresolved_klass_at_put(index, name());
     }
     break;
   case JVM_CONSTANT_UnresolvedString :
     // Patching a string means pre-resolving it.
     // The spelling in the constant pool is ignored.
     // The constant reference may be any object whatever.
     // If it is not a real interned string, the constant is referred
     // to as a "pseudo-string", and must be presented to the CP
     // explicitly, because it may require scavenging.
     cp->pseudo_string_at_put(index, patch());
     break;
   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:
   symbolOop     _name;       // name
   symbolOop     _sig;        // signature
   NameSigHash*  _next;       // Next entry in hash table
 };
 #define HASH_ROW_SIZE 256
 unsigned int hash(symbolOop name, symbolOop 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 symbolOop's to move.
 bool put_after_lookup(symbolOop name, symbolOop 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;
 }
 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
                                                  int length,
                                                  Handle class_loader,
                                                  Handle protection_domain,
                                                  symbolHandle class_name,
                                                  TRAPS) {
   ClassFileStream* cfs = stream();
   assert(length > 0, "only called for length>0");
   objArrayHandle nullHandle;
   objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
   objArrayHandle interfaces (THREAD, interface_oop);
   int index;
   for (index = 0; index < length; index++) {
     u2 interface_index = cfs->get_u2(CHECK_(nullHandle));
     KlassHandle interf;
     check_property(
       valid_cp_range(interface_index, cp->length()) &&
       is_klass_reference(cp, interface_index),
       "Interface name has bad constant pool index %u in class file %s",
       interface_index, CHECK_(nullHandle));
     if (cp->tag_at(interface_index).is_klass()) {
       interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index));
     } else {
       symbolHandle unresolved_klass (THREAD, 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_(nullHandle));
       // Call resolve_super so classcircularity is checked
       klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
                     unresolved_klass, class_loader, protection_domain,
                     false, CHECK_(nullHandle));
       interf = KlassHandle(THREAD, k);
       if (LinkWellKnownClasses)  // my super type is well known to me
         cp->klass_at_put(interface_index, interf()); // eagerly resolve
     }
     if (!Klass::cast(interf())->is_interface()) {
       THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle);
     }
     interfaces->obj_at_put(index, interf());
   }
   if (!_need_verify || length <= 1) {
     return 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++) {
       klassOop k = (klassOop)interfaces->obj_at(index);
       symbolOop 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_(nullHandle));
   }
   return interfaces;
 }
 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, 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() || value_type.is_unresolved_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(constantPoolHandle cp,
                                              u2 attributes_count,
                                              bool is_static, u2 signature_index,
                                              u2* constantvalue_index_addr,
                                              bool* is_synthetic_addr,
                                              u2* generic_signature_index_addr,
                                              typeArrayHandle* field_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;
   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_cp_range(attribute_name_index, cp->length()) &&
                    cp->tag_at(attribute_name_index).is_utf8(),
                    "Invalid field attribute index %u in class file %s",
                    attribute_name_index,
                    CHECK);
     symbolOop 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, cp, 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");
         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 {
         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;
   *field_annotations = assemble_annotations(runtime_visible_annotations,
                                             runtime_visible_annotations_length,
                                             runtime_invisible_annotations,
                                             runtime_invisible_annotations_length,
                                             CHECK);
   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,        // long or double
   STATIC_ALIGNED_DOUBLE,// aligned long or double
   NONSTATIC_OOP,
   NONSTATIC_BYTE,
   NONSTATIC_SHORT,
   NONSTATIC_WORD,
   NONSTATIC_DOUBLE,
   NONSTATIC_ALIGNED_DOUBLE
 };
 struct FieldAllocationCount {
   unsigned int static_oop_count;
   unsigned int static_byte_count;
   unsigned int static_short_count;
   unsigned int static_word_count;
   unsigned int static_double_count;
   unsigned int nonstatic_oop_count;
   unsigned int nonstatic_byte_count;
   unsigned int nonstatic_short_count;
   unsigned int nonstatic_word_count;
   unsigned int nonstatic_double_count;
 };
 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface,
                                               struct FieldAllocationCount *fac,
                                               objArrayHandle* fields_annotations, TRAPS) {
   ClassFileStream* cfs = stream();
   typeArrayHandle nullHandle;
   cfs->guarantee_more(2, CHECK_(nullHandle));  // length
   u2 length = cfs->get_u2_fast();
   // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index]
   typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle));
   typeArrayHandle fields(THREAD, new_fields);
   int index = 0;
   typeArrayHandle field_annotations;
   for (int n = 0; n < length; n++) {
     cfs->guarantee_more(8, CHECK_(nullHandle));  // 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_(nullHandle));
     access_flags.set_flags(flags);
     u2 name_index = cfs->get_u2_fast();
     int cp_size = cp->length();
     check_property(
       valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
       "Invalid constant pool index %u for field name in class file %s",
       name_index, CHECK_(nullHandle));
     symbolHandle name(THREAD, cp->symbol_at(name_index));
     verify_legal_field_name(name, CHECK_(nullHandle));
     u2 signature_index = cfs->get_u2_fast();
     check_property(
       valid_cp_range(signature_index, cp_size) &&
         cp->tag_at(signature_index).is_utf8(),
       "Invalid constant pool index %u for field signature in class file %s",
       signature_index, CHECK_(nullHandle));
     symbolHandle sig(THREAD, cp->symbol_at(signature_index));
     verify_legal_field_signature(name, sig, CHECK_(nullHandle));
     u2 constantvalue_index = 0;
     bool is_synthetic = false;
     u2 generic_signature_index = 0;
     bool is_static = access_flags.is_static();
     u2 attributes_count = cfs->get_u2_fast();
     if (attributes_count > 0) {
       parse_field_attributes(cp, attributes_count, is_static, signature_index,
                              &constantvalue_index, &is_synthetic,
                              &generic_signature_index, &field_annotations,
                              CHECK_(nullHandle));
       if (field_annotations.not_null()) {
         if (fields_annotations->is_null()) {
           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
           *fields_annotations = objArrayHandle(THREAD, md);
         }
         (*fields_annotations)->obj_at_put(n, field_annotations());
       }
       if (is_synthetic) {
         access_flags.set_is_synthetic();
       }
     }
     fields->short_at_put(index++, access_flags.as_short());
     fields->short_at_put(index++, name_index);
     fields->short_at_put(index++, signature_index);
     fields->short_at_put(index++, constantvalue_index);
     // Remember how many oops we encountered and compute allocation type
     BasicType type = cp->basic_type_for_signature_at(signature_index);
     FieldAllocationType atype;
     if ( is_static ) {
       switch ( type ) {
         case  T_BOOLEAN:
         case  T_BYTE:
           fac->static_byte_count++;
           atype = STATIC_BYTE;
           break;
         case  T_LONG:
         case  T_DOUBLE:
           if (Universe::field_type_should_be_aligned(type)) {
             atype = STATIC_ALIGNED_DOUBLE;
           } else {
             atype = STATIC_DOUBLE;
           }
           fac->static_double_count++;
           break;
         case  T_CHAR:
         case  T_SHORT:
           fac->static_short_count++;
           atype = STATIC_SHORT;
           break;
         case  T_FLOAT:
         case  T_INT:
           fac->static_word_count++;
           atype = STATIC_WORD;
           break;
         case  T_ARRAY:
         case  T_OBJECT:
           fac->static_oop_count++;
           atype = STATIC_OOP;
           break;
         case  T_ADDRESS:
         case  T_VOID:
         default:
           assert(0, "bad field type");
       }
     } else {
       switch ( type ) {
         case  T_BOOLEAN:
         case  T_BYTE:
           fac->nonstatic_byte_count++;
           atype = NONSTATIC_BYTE;
           break;
         case  T_LONG:
         case  T_DOUBLE:
           if (Universe::field_type_should_be_aligned(type)) {
             atype = NONSTATIC_ALIGNED_DOUBLE;
           } else {
             atype = NONSTATIC_DOUBLE;
           }
           fac->nonstatic_double_count++;
           break;
         case  T_CHAR:
         case  T_SHORT:
           fac->nonstatic_short_count++;
           atype = NONSTATIC_SHORT;
           break;
         case  T_FLOAT:
         case  T_INT:
           fac->nonstatic_word_count++;
           atype = NONSTATIC_WORD;
           break;
         case  T_ARRAY:
         case  T_OBJECT:
           fac->nonstatic_oop_count++;
           atype = NONSTATIC_OOP;
           break;
         case  T_ADDRESS:
         case  T_VOID:
         default:
           assert(0, "bad field type");
       }
     }
     // The correct offset is computed later (all oop fields will be located together)
     // We temporarily store the allocation type in the offset field
     fields->short_at_put(index++, atype);
     fields->short_at_put(index++, 0);  // Clear out high word of byte offset
     fields->short_at_put(index++, generic_signature_index);
   }
   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 (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) {
         int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
         symbolOop name = cp->symbol_at(name_index);
         int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset);
         symbolOop sig = cp->symbol_at(sig_index);
         // 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_(nullHandle));
     }
   }
   return fields;
 }
 static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
   while (length-- > 0) {
     *dest++ = Bytes::get_Java_u2((u1*) (src++));
   }
 }
 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length,
                                                        u4 exception_table_length,
                                                        constantPoolHandle cp,
                                                        TRAPS) {
   ClassFileStream* cfs = stream();
   typeArrayHandle nullHandle;
   // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index]
   typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle));
   typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh);
   int index = 0;
   cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index
   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();
     // Will check legal target after parsing code array in verifier.
     if (_need_verify) {
       guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
                          "Illegal exception table range in class file %s", CHECK_(nullHandle));
       guarantee_property(handler_pc < code_length,
                          "Illegal exception table handler in class file %s", CHECK_(nullHandle));
       if (catch_type_index != 0) {
         guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
                            is_klass_reference(cp, catch_type_index),
                            "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle));
       }
     }
     exception_handlers->int_at_put(index++, start_pc);
     exception_handlers->int_at_put(index++, end_pc);
     exception_handlers->int_at_put(index++, handler_pc);
     exception_handlers->int_at_put(index++, catch_type_index);
   }
   return exception_handlers;
 }
 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 {
  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,
                                                constantPoolHandle cp,
                                                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_cp_range(name_index, cp_size) &&
           cp->tag_at(name_index).is_utf8(),
         "Name index %u in %s has bad constant type in class file %s",
         name_index, tbl_name, CHECK_NULL);
       guarantee_property(
         valid_cp_range(descriptor_index, cp_size) &&
           cp->tag_at(descriptor_index).is_utf8(),
         "Signature index %u in %s has bad constant type in class file %s",
         descriptor_index, tbl_name, CHECK_NULL);
       symbolHandle name(THREAD, cp->symbol_at(name_index));
       symbolHandle sig(THREAD, 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, constantPoolHandle cp, 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_cp_range(class_index, cp->length()) &&
                          is_klass_reference(cp, 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;
 }
 typeArrayOop 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;
   }
   typeArrayOop stackmap_data =
     oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
   stackmap_data->set_length(code_attribute_length);
   memcpy((void*)stackmap_data->byte_at_addr(0),
          (void*)stackmap_table_start, code_attribute_length);
   return stackmap_data;
 }
 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
                                               u4 method_attribute_length,
                                               constantPoolHandle cp, 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_cp_range(checked_exception, cp->length()) &&
         is_klass_reference(cp, 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, symbolHandle name, symbolHandle 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());
 }
 #define MAX_ARGS_SIZE 255
 #define MAX_CODE_SIZE 65535
 #define INITIAL_MAX_LVT_NUMBER 256
 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions
 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the
 // methodOop to save footprint, so we only know the size of the resulting methodOop 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(constantPoolHandle cp, bool is_interface,
                                            AccessFlags *promoted_flags,
                                            typeArrayHandle* method_annotations,
                                            typeArrayHandle* method_parameter_annotations,
                                            typeArrayHandle* method_default_annotations,
                                            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_cp_range(name_index, cp_size) &&
       cp->tag_at(name_index).is_utf8(),
     "Illegal constant pool index %u for method name in class file %s",
     name_index, CHECK_(nullHandle));
   symbolHandle name(THREAD, cp->symbol_at(name_index));
   verify_legal_method_name(name, CHECK_(nullHandle));
   u2 signature_index = cfs->get_u2_fast();
   guarantee_property(
     valid_cp_range(signature_index, cp_size) &&
       cp->tag_at(signature_index).is_utf8(),
     "Illegal constant pool index %u for method signature in class file %s",
     signature_index, CHECK_(nullHandle));
   symbolHandle signature(THREAD, cp->symbol_at(signature_index));
   AccessFlags access_flags;
   if (name == vmSymbols::class_initializer_name()) {
     // We ignore the access flags for a class initializer. (JVM Spec. p. 116)
     flags = JVM_ACC_STATIC;
   } 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;
   typeArrayHandle exception_handlers(THREAD, 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;
   bool parsed_code_attribute = false;
   bool parsed_checked_exceptions_attribute = false;
   bool parsed_stackmap_attribute = false;
   // stackmap attribute - JDK1.5
   typeArrayHandle stackmap_data;
   u2 generic_signature_index = 0;
   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* 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_cp_range(method_attribute_name_index, cp_size) &&
         cp->tag_at(method_attribute_name_index).is_utf8(),
       "Invalid method attribute name index %u in class file %s",
       method_attribute_name_index, CHECK_(nullHandle));
     symbolOop 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_handlers =
               parse_exception_table(code_length, exception_table_length, cp, 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_cp_range(code_attribute_name_index, cp_size) &&
                        cp->tag_at(code_attribute_name_index).is_utf8(),
                        "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,
                                       cp,
                                       &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,
                                       cp,
                                       &localvariable_type_table_length[lvtt_cnt],
                                       true,     // is LVTT
                                       CHECK_(nullHandle));
           lvtt_cnt++;
         } else if (UseSplitVerifier &&
                    _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));
           }
           typeArrayOop sm =
             parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
           stackmap_data = typeArrayHandle(THREAD, sm);
           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,
                                      cp, CHECK_(nullHandle));
     } 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");
         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 {
         // 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 methodOop is finally available, now create it
   methodOop m_oop  = oopFactory::new_method(
     code_length, access_flags, linenumber_table_length,
     total_lvt_length, checked_exceptions_length,
     methodOopDesc::IsSafeConc, CHECK_(nullHandle));
   methodHandle m (THREAD, m_oop);
   ClassLoadingService::add_class_method_size(m_oop->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);
   m->set_generic_signature_index(generic_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);
   m->constMethod()->set_stackmap_data(stackmap_data());
   /**
    * The exception_table field is the flag used to indicate
    * that the methodOop and it's associated constMethodOop are partially
    * initialized and thus are exempt from pre/post GC verification.  Once
    * the field is set, the oops are considered fully initialized so make
    * sure that the oops can pass verification when this field is set.
    */
   m->set_exception_table(exception_handlers());
   // 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 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.
    *
    * 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.
    */
   if (total_lvt_length > 0) {
     int tbl_no, idx;
     promoted_flags->set_has_localvariable_table();
     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 = m->localvariable_table_start();
     for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
       cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
       for (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_(nullHandle));
         }
       }
     }
     // To merge LocalVariableTable and LocalVariableTypeTable
     Classfile_LVT_Element* cf_lvtt;
     LocalVariableTableElement lvtt_elem;
     for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
       cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
       for (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_(nullHandle));
           }
         } 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_(nullHandle));
         } else {
           // to add generic signatures into LocalVariableTable
           entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
         }
       }
     }
     clear_hashtable(lvt_Hash);
   }
   *method_annotations = assemble_annotations(runtime_visible_annotations,
                                              runtime_visible_annotations_length,
                                              runtime_invisible_annotations,
                                              runtime_invisible_annotations_length,
                                              CHECK_(nullHandle));
   *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
                                                        runtime_visible_parameter_annotations_length,
                                                        runtime_invisible_parameter_annotations,
                                                        runtime_invisible_parameter_annotations_length,
                                                        CHECK_(nullHandle));
   *method_default_annotations = assemble_annotations(annotation_default,
                                                      annotation_default_length,
                                                      NULL,
 ,
                                                      CHECK_(nullHandle));
   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;
   }
   if (EnableMethodHandles && (m->is_method_handle_invoke() ||
                               m->is_method_handle_adapter())) {
     THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
                "Method handle invokers must be defined internally to the VM", nullHandle);
   }
   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.
 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
                                               AccessFlags* promoted_flags,
                                               bool* has_final_method,
                                               objArrayOop* methods_annotations_oop,
                                               objArrayOop* methods_parameter_annotations_oop,
                                               objArrayOop* methods_default_annotations_oop,
                                               TRAPS) {
   ClassFileStream* cfs = stream();
   objArrayHandle nullHandle;
   typeArrayHandle method_annotations;
   typeArrayHandle method_parameter_annotations;
   typeArrayHandle method_default_annotations;
   cfs->guarantee_more(2, CHECK_(nullHandle));  // length
   u2 length = cfs->get_u2_fast();
   if (length == 0) {
     return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
   } else {
     objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
     objArrayHandle methods(THREAD, m);
     HandleMark hm(THREAD);
     objArrayHandle methods_annotations;
     objArrayHandle methods_parameter_annotations;
     objArrayHandle methods_default_annotations;
     for (int index = 0; index < length; index++) {
       methodHandle method = parse_method(cp, is_interface,
                                          promoted_flags,
                                          &method_annotations,
                                          &method_parameter_annotations,
                                          &method_default_annotations,
                                          CHECK_(nullHandle));
       if (method->is_final()) {
         *has_final_method = true;
       }
       methods->obj_at_put(index, method());
       if (method_annotations.not_null()) {
         if (methods_annotations.is_null()) {
           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
           methods_annotations = objArrayHandle(THREAD, md);
         }
         methods_annotations->obj_at_put(index, method_annotations());
       }
       if (method_parameter_annotations.not_null()) {
         if (methods_parameter_annotations.is_null()) {
           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
           methods_parameter_annotations = objArrayHandle(THREAD, md);
         }
         methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
       }
       if (method_default_annotations.not_null()) {
         if (methods_default_annotations.is_null()) {
           objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
           methods_default_annotations = objArrayHandle(THREAD, md);
         }
         methods_default_annotations->obj_at_put(index, method_default_annotations());
       }
     }
     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++) {
           methodOop m = (methodOop)methods->obj_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_(nullHandle));
       }
     }
     *methods_annotations_oop = methods_annotations();
     *methods_parameter_annotations_oop = methods_parameter_annotations();
     *methods_default_annotations_oop = methods_default_annotations();
     return methods;
   }
 }
 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
                                               objArrayHandle methods_annotations,
                                               objArrayHandle methods_parameter_annotations,
                                               objArrayHandle methods_default_annotations,
                                               TRAPS) {
   typeArrayHandle nullHandle;
   int length = methods()->length();
   // If JVMTI original method ordering is enabled we have to
   // remember the original class file ordering.
   // We temporarily use the vtable_index field in the methodOop to store the
   // class file index, so we can read in after calling qsort.
   if (JvmtiExport::can_maintain_original_method_order()) {
     for (int index = 0; index < length; index++) {
       methodOop m = methodOop(methods->obj_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 symbolOopDesc::fast_compare
   methodOopDesc::sort_methods(methods(),
                               methods_annotations(),
                               methods_parameter_annotations(),
                               methods_default_annotations());
   // If JVMTI original method ordering is enabled construct int array remembering the original ordering
   if (JvmtiExport::can_maintain_original_method_order()) {
     typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
     typeArrayHandle method_ordering(THREAD, new_ordering);
     for (int index = 0; index < length; index++) {
       methodOop m = methodOop(methods->obj_at(index));
       int old_index = m->vtable_index();
       assert(old_index >= 0 && old_index < length, "invalid method index");
       method_ordering->int_at_put(index, old_index);
       m->set_vtable_index(methodOopDesc::invalid_vtable_index);
     }
     return method_ordering;
   } else {
     return typeArrayHandle(THREAD, Universe::the_empty_int_array());
   }
 }
 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
   ClassFileStream* cfs = stream();
   cfs->guarantee_more(2, CHECK);  // sourcefile_index
   u2 sourcefile_index = cfs->get_u2_fast();
   check_property(
     valid_cp_range(sourcefile_index, cp->length()) &&
       cp->tag_at(sourcefile_index).is_utf8(),
     "Invalid SourceFile attribute at constant pool index %u in class file %s",
     sourcefile_index, CHECK);
   k->set_source_file_name(cp->symbol_at(sourcefile_index));
 }
 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
                                                                        instanceKlassHandle k,
                                                                        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()) {
     // Optimistically assume that only 1 byte UTF format is used
     // (common case)
     symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer,
                                                   length, CHECK);
     k->set_source_debug_extension(sde_symbol);
   }
   // 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(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
   ClassFileStream* cfs = stream();
   cfs->guarantee_more(2, CHECK_0);  // length
   u2 length = cfs->get_u2_fast();
   // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags]
   typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0);
   typeArrayHandle inner_classes(THREAD, ic);
   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_cp_range(inner_class_info_index, cp_size) &&
         is_klass_reference(cp, 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_cp_range(outer_class_info_index, cp_size) &&
         is_klass_reference(cp, 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_cp_range(inner_name_index, cp_size) &&
         cp->tag_at(inner_name_index).is_utf8()),
       "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->short_at_put(index++, inner_class_info_index);
     inner_classes->short_at_put(index++, outer_class_info_index);
     inner_classes->short_at_put(index++, inner_name_index);
     inner_classes->short_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 < inner_classes->length(); i += 4) {
       for(int j = i + 4; j < inner_classes->length(); j += 4) {
         guarantee_property((inner_classes->ushort_at(i)   != inner_classes->ushort_at(j) ||
                             inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
                             inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
                             inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
                             "Duplicate entry in InnerClasses in class file %s",
                             CHECK_0);
       }
     }
   }
   // Update instanceKlass with inner class info.
   k->set_inner_classes(inner_classes());
   return length;
 }
 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
   k->set_is_synthetic();
 }
 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
   ClassFileStream* cfs = stream();
   u2 signature_index = cfs->get_u2(CHECK);
   check_property(
     valid_cp_range(signature_index, cp->length()) &&
       cp->tag_at(signature_index).is_utf8(),
     "Invalid constant pool index %u in Signature attribute in class file %s",
     signature_index, CHECK);
   k->set_generic_signature(cp->symbol_at(signature_index));
 }
 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k,
                                                                   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);
   typeArrayOop operands_oop = oopFactory::new_permanent_intArray(index_size + operand_count, CHECK);
   typeArrayHandle operands(THREAD, operands_oop);
   operands_oop = NULL; // tidy
   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.
     assert(constantPoolOopDesc::operand_offset_at(operands(), n) == 0, "");
     constantPoolOopDesc::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->short_at_put(operand_fill_index++, bootstrap_method_index);
     operands->short_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->short_at_put(operand_fill_index++, argument_index);
     }
   }
   assert(operand_fill_index == operands()->length(), "exact fill");
   assert(constantPoolOopDesc::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);
   cp->set_operands(operands());
 }
 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
   ClassFileStream* cfs = stream();
   // Set inner classes attribute to default sentinel
   k->set_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;
   // 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_cp_range(attribute_name_index, cp->length()) &&
         cp->tag_at(attribute_name_index).is_utf8(),
       "Attribute name has bad constant pool index %u in class file %s",
       attribute_name_index, CHECK);
     symbolOop 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(cp, k, CHECK);
     } else if (tag == vmSymbols::tag_source_debug_extension()) {
       // Check for SourceDebugExtension tag
       parse_classfile_source_debug_extension_attribute(cp, k, (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;
       }
       u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK);
       if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
         guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
                           "Wrong InnerClasses attribute length in class file %s", 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(cp, k, 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(cp, k, 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");
         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
         u2 class_index  = cfs->get_u2_fast();
         u2 method_index = cfs->get_u2_fast();
         if (class_index == 0) {
           classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
         }
         // Validate the constant pool indices and types
         if (!cp->is_within_bounds(class_index) ||
             !is_klass_reference(cp, class_index)) {
           classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
         }
         if (method_index != 0 &&
             (!cp->is_within_bounds(method_index) ||
              !cp->tag_at(method_index).is_name_and_type())) {
           classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
         }
         k->set_enclosing_method_indices(class_index, method_index);
       } 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(cp, k, attribute_length, CHECK);
       } else {
         // Unknown attribute
         cfs->skip_u1(attribute_length, CHECK);
       }
     } else {
       // Unknown attribute
       cfs->skip_u1(attribute_length, CHECK);
     }
   }
   typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
                                                      runtime_visible_annotations_length,
                                                      runtime_invisible_annotations,
                                                      runtime_invisible_annotations_length,
                                                      CHECK);
   k->set_class_annotations(annotations());
   if (_max_bootstrap_specifier_index >= 0) {
     guarantee_property(parsed_bootstrap_methods_attribute,
                        "Missing BootstrapMethods attribute in class file %s", CHECK);
   }
 }
 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
                                                       int runtime_visible_annotations_length,
                                                       u1* runtime_invisible_annotations,
                                                       int runtime_invisible_annotations_length, TRAPS) {
   typeArrayHandle annotations;
   if (runtime_visible_annotations != NULL ||
       runtime_invisible_annotations != NULL) {
     typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
                                                             runtime_invisible_annotations_length, CHECK_(annotations));
     annotations = typeArrayHandle(THREAD, anno);
     if (runtime_visible_annotations != NULL) {
       memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
     }
     if (runtime_invisible_annotations != NULL) {
       memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
     }
   }
   return annotations;
 }
 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
   KlassHandle h_k (THREAD, fd->field_holder());
   assert(h_k.not_null() && fd->is_static(), "just checking");
   if (fd->has_initial_value()) {
     BasicType t = fd->field_type();
     switch (t) {
       case T_BYTE:
         h_k()->byte_field_put(fd->offset(), fd->int_initial_value());
               break;
       case T_BOOLEAN:
         h_k()->bool_field_put(fd->offset(), fd->int_initial_value());
               break;
       case T_CHAR:
         h_k()->char_field_put(fd->offset(), fd->int_initial_value());
               break;
       case T_SHORT:
         h_k()->short_field_put(fd->offset(), fd->int_initial_value());
               break;
       case T_INT:
         h_k()->int_field_put(fd->offset(), fd->int_initial_value());
         break;
       case T_FLOAT:
         h_k()->float_field_put(fd->offset(), fd->float_initial_value());
         break;
       case T_DOUBLE:
         h_k()->double_field_put(fd->offset(), fd->double_initial_value());
         break;
       case T_LONG:
         h_k()->long_field_put(fd->offset(), fd->long_initial_value());
         break;
       case T_OBJECT:
         {
           #ifdef ASSERT
           symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK);
           assert(fd->signature() == sym, "just checking");
           #endif
           oop string = fd->string_initial_value(CHECK);
           h_k()->obj_field_put(fd->offset(), string);
         }
         break;
       default:
         THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
                   "Illegal ConstantValue attribute in class file");
     }
   }
 }
 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
   constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) {
   // This code is for compatibility with earlier jdk's that do not
   // have the "discovered" field in java.lang.ref.Reference.  For 1.5
   // the check for the "discovered" field should issue a warning if
   // the field is not found.  For 1.6 this code should be issue a
   // fatal error if the "discovered" field is not found.
   //
   // Increment fac.nonstatic_oop_count so that the start of the
   // next type of non-static oops leaves room for the fake oop.
   // Do not increment next_nonstatic_oop_offset so that the
   // fake oop is place after the java.lang.ref.Reference oop
   // fields.
   //
   // Check the fields in java.lang.ref.Reference for the "discovered"
   // field.  If it is not present, artifically create a field for it.
   // This allows this VM to run on early JDK where the field is not
   // present.
   int reference_sig_index = 0;
   int reference_name_index = 0;
   int reference_index = 0;
   int extra = java_lang_ref_Reference::number_of_fake_oop_fields;
   const int n = (*fields_ptr)()->length();
   for (int i = 0; i < n; i += instanceKlass::next_offset ) {
     int name_index =
     (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset);
     int sig_index  =
       (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset);
     symbolOop f_name = cp->symbol_at(name_index);
     symbolOop f_sig  = cp->symbol_at(sig_index);
     if (f_sig == vmSymbols::reference_signature() && reference_index == 0) {
       // Save the index for reference signature for later use.
       // The fake discovered field does not entries in the
       // constant pool so the index for its signature cannot
       // be extracted from the constant pool.  It will need
       // later, however.  It's signature is vmSymbols::reference_signature()
       // so same an index for that signature.
       reference_sig_index = sig_index;
       reference_name_index = name_index;
       reference_index = i;
     }
     if (f_name == vmSymbols::reference_discovered_name() &&
       f_sig == vmSymbols::reference_signature()) {
       // The values below are fake but will force extra
       // non-static oop fields and a corresponding non-static
       // oop map block to be allocated.
       extra = 0;
       break;
     }
   }
   if (extra != 0) {
     fac_ptr->nonstatic_oop_count += extra;
     // Add the additional entry to "fields" so that the klass
     // contains the "discoverd" field and the field will be initialized
     // in instances of the object.
     int fields_with_fix_length = (*fields_ptr)()->length() +
       instanceKlass::next_offset;
     typeArrayOop ff = oopFactory::new_permanent_shortArray(
                                                 fields_with_fix_length, CHECK);
     typeArrayHandle fields_with_fix(THREAD, ff);
     // Take everything from the original but the length.
     for (int idx = 0; idx < (*fields_ptr)->length(); idx++) {
       fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx));
     }
     // Add the fake field at the end.
     int i = (*fields_ptr)->length();
     // There is no name index for the fake "discovered" field nor
     // signature but a signature is needed so that the field will
     // be properly initialized.  Use one found for
     // one of the other reference fields. Be sure the index for the
     // name is 0.  In fieldDescriptor::initialize() the index of the
     // name is checked.  That check is by passed for the last nonstatic
     // oop field in a java.lang.ref.Reference which is assumed to be
     // this artificial "discovered" field.  An assertion checks that
     // the name index is 0.
     assert(reference_index != 0, "Missing signature for reference");
     int j;
     for (j = 0; j < instanceKlass::next_offset; j++) {
       fields_with_fix->ushort_at_put(i + j,
         (*fields_ptr)->ushort_at(reference_index +j));
     }
     // Clear the public access flag and set the private access flag.
     short flags;
     flags =
       fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset);
     assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set");
     flags = flags & (~JVM_ACC_PUBLIC);
     flags = flags | JVM_ACC_PRIVATE;
     AccessFlags access_flags;
     access_flags.set_flags(flags);
     assert(!access_flags.is_public(), "Failed to clear public flag");
     assert(access_flags.is_private(), "Failed to set private flag");
     fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset,
       flags);
     assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset)
       == reference_name_index, "The fake reference name is incorrect");
     assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset)
       == reference_sig_index, "The fake reference signature is incorrect");
     // The type of the field is stored in the low_offset entry during
     // parsing.
     assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) ==
       NONSTATIC_OOP, "The fake reference type is incorrect");
     // "fields" is allocated in the permanent generation.  Disgard
     // it and let it be collected.
     (*fields_ptr) = fields_with_fix;
   }
   return;
 }
 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr,
   FieldAllocationCount *fac_ptr, TRAPS) {
   // Add fake fields for java.lang.Class instances
   //
   // This is not particularly nice. We should consider adding a
   // private transient object field at the Java level to
   // java.lang.Class. Alternatively we could add a subclass of
   // instanceKlass which provides an accessor and size computer for
   // this field, but that appears to be more code than this hack.
   //
   // NOTE that we wedge these in at the beginning rather than the
   // end of the object because the Class layout changed between JDK
   // 1.3 and JDK 1.4 with the new reflection implementation; some
   // nonstatic oop fields were added at the Java level. The offsets
   // of these fake fields can't change between these two JDK
   // versions because when the offsets are computed at bootstrap
   // time we don't know yet which version of the JDK we're running in.
   // The values below are fake but will force two non-static oop fields and
   // a corresponding non-static oop map block to be allocated.
   const int extra = java_lang_Class::number_of_fake_oop_fields;
   fac_ptr->nonstatic_oop_count += extra;
 }
 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) {
   // Cause the extra fake fields in java.lang.Class to show up before
   // the Java fields for layout compatibility between 1.3 and 1.4
   // Incrementing next_nonstatic_oop_offset here advances the
   // location where the real java fields are placed.
   const int extra = java_lang_Class::number_of_fake_oop_fields;
   (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize);
 }
 // Force MethodHandle.vmentry to be an unmanaged pointer.
 // There is no way for a classfile to express this, so we must help it.
 void ClassFileParser::java_dyn_MethodHandle_fix_pre(constantPoolHandle cp,
                                                     typeArrayHandle fields,
                                                     FieldAllocationCount *fac_ptr,
                                                     TRAPS) {
   // Add fake fields for java.dyn.MethodHandle instances
   //
   // This is not particularly nice, but since there is no way to express
   // a native wordSize field in Java, we must do it at this level.
   if (!EnableMethodHandles)  return;
   int word_sig_index = 0;
   const int cp_size = cp->length();
   for (int index = 1; index < cp_size; index++) {
     if (cp->tag_at(index).is_utf8() &&
         cp->symbol_at(index) == vmSymbols::machine_word_signature()) {
       word_sig_index = index;
       break;
     }
   }
   if (word_sig_index == 0)
     THROW_MSG(vmSymbols::java_lang_VirtualMachineError(),
               "missing I or J signature (for vmentry) in java.dyn.MethodHandle");
   // Find vmentry field and change the signature.
   bool found_vmentry = false;
   for (int i = 0; i < fields->length(); i += instanceKlass::next_offset) {
     int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
     int sig_index  = fields->ushort_at(i + instanceKlass::signature_index_offset);
     int acc_flags  = fields->ushort_at(i + instanceKlass::access_flags_offset);
     symbolOop f_name = cp->symbol_at(name_index);
     symbolOop f_sig  = cp->symbol_at(sig_index);
     if (f_name == vmSymbols::vmentry_name() && (acc_flags & JVM_ACC_STATIC) == 0) {
       if (f_sig == vmSymbols::machine_word_signature()) {
         // If the signature of vmentry is already changed, we're done.
         found_vmentry = true;
         break;
       }
       else if (f_sig == vmSymbols::byte_signature()) {
         // Adjust the field type from byte to an unmanaged pointer.
         assert(fac_ptr->nonstatic_byte_count > 0, "");
         fac_ptr->nonstatic_byte_count -= 1;
         fields->ushort_at_put(i + instanceKlass::signature_index_offset, word_sig_index);
         assert(wordSize == longSize || wordSize == jintSize, "ILP32 or LP64");
         if (wordSize == longSize)  fac_ptr->nonstatic_double_count += 1;
         else                       fac_ptr->nonstatic_word_count   += 1;
         FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset);
         assert(atype == NONSTATIC_BYTE, "");
         FieldAllocationType new_atype = (wordSize == longSize) ? NONSTATIC_DOUBLE : NONSTATIC_WORD;
         fields->ushort_at_put(i + instanceKlass::low_offset, new_atype);
         found_vmentry = true;
         break;
       }
     }
   }
   if (!found_vmentry)
     THROW_MSG(vmSymbols::java_lang_VirtualMachineError(),
               "missing vmentry byte field in java.dyn.MethodHandle");
 }
 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name,
                                                     Handle class_loader,
                                                     Handle protection_domain,
                                                     KlassHandle host_klass,
                                                     GrowableArray<Handle>* cp_patches,
                                                     symbolHandle& parsed_name,
                                                     bool verify,
                                                     TRAPS) {
   // So that JVMTI can cache class file in the state before retransformable agents
   // have modified it
   unsigned char *cached_class_file_bytes = NULL;
   jint cached_class_file_length;
   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);
   _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
   _max_bootstrap_specifier_index = -1;
   if (JvmtiExport::should_post_class_file_load_hook()) {
     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.not_null()? name : vmSymbolHandles::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.is_null()) {
       Exceptions::fthrow(
         THREAD_AND_LOCATION,
         vmSymbolHandles::java_lang_UnsupportedClassVersionError(),
         "Unsupported major.minor version %u.%u",
         major_version,
         minor_version);
     } else {
       ResourceMark rm(THREAD);
       Exceptions::fthrow(
         THREAD_AND_LOCATION,
         vmSymbolHandles::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
   instanceKlassHandle super_klass;
   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));
   symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index));
   assert(class_name.not_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;
   // 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));
   }
   klassOop 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.not_null() && class_name() != name()) {
       ResourceMark rm(THREAD);
       Exceptions::fthrow(
         THREAD_AND_LOCATION,
         vmSymbolHandles::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()->as_klass_external_name());
       if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
       tty->print_cr("]");
     }
     u2 super_class_index = cfs->get_u2_fast();
     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_(nullHandle));
     } else {
       check_property(valid_cp_range(super_class_index, cp_size) &&
                      is_klass_reference(cp, super_class_index),
                      "Invalid superclass index %u in class file %s",
                      super_class_index,
                      CHECK_(nullHandle));
       // 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_(nullHandle));
       }
     }
     // Interfaces
     u2 itfs_len = cfs->get_u2_fast();
     objArrayHandle local_interfaces;
     if (itfs_len == 0) {
       local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
     } else {
       local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle));
     }
     // Fields (offsets are filled in later)
     struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0};
     objArrayHandle fields_annotations;
     typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle));
     // Methods
     bool has_final_method = false;
     AccessFlags promoted_flags;
     promoted_flags.set_flags(0);
     // These need to be oop pointers because they are allocated lazily
     // inside parse_methods inside a nested HandleMark
     objArrayOop methods_annotations_oop = NULL;
     objArrayOop methods_parameter_annotations_oop = NULL;
     objArrayOop methods_default_annotations_oop = NULL;
     objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
                                            &promoted_flags,
                                            &has_final_method,
                                            &methods_annotations_oop,
                                            &methods_parameter_annotations_oop,
                                            &methods_default_annotations_oop,
                                            CHECK_(nullHandle));
     objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
     objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
     objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
     // We check super class after class file is parsed and format is checked
     if (super_class_index > 0 && super_klass.is_null()) {
       symbolHandle sk (THREAD, 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));
       }
       klassOop 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 (LinkWellKnownClasses)  // my super class is well known to me
         cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve
     }
     if (super_klass.not_null()) {
       if (super_klass->is_interface()) {
         ResourceMark rm(THREAD);
         Exceptions::fthrow(
           THREAD_AND_LOCATION,
           vmSymbolHandles::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);
       }
     }
     // Compute the transitive list of all unique interfaces implemented by this class
     objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
     // sort methods
     typeArrayHandle method_ordering = sort_methods(methods,
                                                    methods_annotations,
                                                    methods_parameter_annotations,
                                                    methods_default_annotations,
                                                    CHECK_(nullHandle));
     // 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;
     klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
                                                       num_miranda_methods,
                                                       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);
     // Field size and offset computation
     int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
 #ifndef PRODUCT
     int orig_nonstatic_field_size = 0;
 #endif
     int static_field_size = 0;
     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_static_type_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 next_nonstatic_type_offset;
     int first_nonstatic_oop_offset;
     int first_nonstatic_field_offset;
     int next_nonstatic_field_offset;
     // Calculate the starting byte offsets
     next_static_oop_offset      = (instanceKlass::header_size() +
                                   align_object_offset(vtable_size) +
                                   align_object_offset(itable_size)) * wordSize;
     next_static_double_offset   = next_static_oop_offset +
                                   (fac.static_oop_count * heapOopSize);
     if ( fac.static_double_count &&
          (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.static_double_count * BytesPerLong);
     next_static_short_offset    = next_static_word_offset +
                                   (fac.static_word_count * BytesPerInt);
     next_static_byte_offset     = next_static_short_offset +
                                   (fac.static_short_count * BytesPerShort);
     next_static_type_offset     = align_size_up((next_static_byte_offset +
                                   fac.static_byte_count ), wordSize );
     static_field_size           = (next_static_type_offset -
                                   next_static_oop_offset) / wordSize;
     first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() +
                                    nonstatic_field_size * heapOopSize;
     next_nonstatic_field_offset = first_nonstatic_field_offset;
     // Add fake fields for java.lang.Class instances (also see below)
     if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) {
       java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle));
     }
     // adjust the vmentry field declaration in java.dyn.MethodHandle
     if (EnableMethodHandles && class_name() == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) {
       java_dyn_MethodHandle_fix_pre(cp, fields, &fac, CHECK_(nullHandle));
     }
     // Add a fake "discovered" field if it is not present
     // for compatibility with earlier jdk's.
     if (class_name() == vmSymbols::java_lang_ref_Reference()
       && class_loader.is_null()) {
       java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle));
     }
     // end of "discovered" field compactibility fix
     unsigned int nonstatic_double_count = fac.nonstatic_double_count;
     unsigned int nonstatic_word_count   = fac.nonstatic_word_count;
     unsigned int nonstatic_short_count  = fac.nonstatic_short_count;
     unsigned int nonstatic_byte_count   = fac.nonstatic_byte_count;
     unsigned int nonstatic_oop_count    = fac.nonstatic_oop_count;
     bool super_has_nonstatic_fields =
             (super_klass() != NULL && super_klass->has_nonstatic_fields());
     bool has_nonstatic_fields  =  super_has_nonstatic_fields ||
             ((nonstatic_double_count + nonstatic_word_count +
               nonstatic_short_count + nonstatic_byte_count +
               nonstatic_oop_count) != 0);
     // Prepare list of oops for oop map generation.
     int* nonstatic_oop_offsets;
     unsigned int* nonstatic_oop_counts;
     unsigned int nonstatic_oop_map_count = 0;
     nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
               THREAD, int, nonstatic_oop_count + 1);
     nonstatic_oop_counts  = NEW_RESOURCE_ARRAY_IN_THREAD(
               THREAD, unsigned int, nonstatic_oop_count + 1);
     // Add fake fields for java.lang.Class instances (also see above).
     // FieldsAllocationStyle and CompactFields values will be reset to default.
     if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) {
       java_lang_Class_fix_post(&next_nonstatic_field_offset);
       nonstatic_oop_offsets[0] = first_nonstatic_field_offset;
       const uint fake_oop_count = (next_nonstatic_field_offset -
                                    first_nonstatic_field_offset) / heapOopSize;
       nonstatic_oop_counts[0] = fake_oop_count;
       nonstatic_oop_map_count = 1;
       nonstatic_oop_count -= fake_oop_count;
       first_nonstatic_oop_offset = first_nonstatic_field_offset;
     } else {
       first_nonstatic_oop_offset = 0; // will be set for first oop field
     }
 #ifndef PRODUCT
     if( PrintCompactFieldsSavings ) {
       next_nonstatic_double_offset = next_nonstatic_field_offset +
                                      (nonstatic_oop_count * heapOopSize);
       if ( nonstatic_double_count > 0 ) {
         next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
       }
       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_type_offset  = align_size_up((next_nonstatic_byte_offset +
                                     nonstatic_byte_count ), heapOopSize );
       orig_nonstatic_field_size   = nonstatic_field_size +
       ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize);
     }
 #endif
     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
     }
     if( allocation_style == 0 ) {
       // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
       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
       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 ) {
         int map_size = super_klass->nonstatic_oop_map_size();
         OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps();
         OopMapBlock* last_map = first_map + map_size - 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;
     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);
     int notaligned_offset;
     if( allocation_style == 0 ) {
       notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
     } else { // allocation_style == 1
       next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
       if( nonstatic_oop_count > 0 ) {
         next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
       }
       notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
     }
     next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize );
     nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
                                    - first_nonstatic_field_offset)/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).
     int len = fields->length();
     for (int i = 0; i < len; i += instanceKlass::next_offset) {
       int real_offset;
       FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset);
       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_ALIGNED_DOUBLE:
         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
             nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
           } else {
             // Create new oop map
             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_ALIGNED_DOUBLE:
         case NONSTATIC_DOUBLE:
           real_offset = next_nonstatic_double_offset;
           next_nonstatic_double_offset += BytesPerLong;
           break;
         default:
           ShouldNotReachHere();
       }
       fields->short_at_put(i + instanceKlass::low_offset,  extract_low_short_from_int(real_offset));
       fields->short_at_put(i + instanceKlass::high_offset, extract_high_short_from_int(real_offset));
     }
     // Size of instances
     int instance_size;
     next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
     instance_size = align_object_size(next_nonstatic_type_offset / 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");
     // 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);
     // Compute reference type
     ReferenceType rt;
     if (super_klass() == NULL) {
       rt = REF_NONE;
     } else {
       rt = super_klass->reference_type();
     }
     // We can now create the basic klassOop for this klass
     klassOop ik = oopFactory::new_instanceKlass(vtable_size, itable_size,
                                                 static_field_size,
                                                 total_oop_map_count,
                                                 rt, CHECK_(nullHandle));
     instanceKlassHandle this_klass (THREAD, ik);
     assert(this_klass->static_field_size() == static_field_size, "sanity");
     assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
            "sanity");
     // Fill in information already parsed
     this_klass->set_access_flags(access_flags);
     this_klass->set_should_verify_class(verify);
     jint lh = Klass::instance_layout_helper(instance_size, false);
     this_klass->set_layout_helper(lh);
     assert(this_klass->oop_is_instance(), "layout is correct");
     assert(this_klass->size_helper() == 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(class_loader());
     this_klass->set_nonstatic_field_size(nonstatic_field_size);
     this_klass->set_has_nonstatic_fields(has_nonstatic_fields);
     this_klass->set_static_oop_field_size(fac.static_oop_count);
     cp->set_pool_holder(this_klass());
     this_klass->set_constants(cp());
     this_klass->set_local_interfaces(local_interfaces());
     this_klass->set_fields(fields());
     this_klass->set_methods(methods());
     if (has_final_method) {
       this_klass->set_has_final_method();
     }
     this_klass->set_method_ordering(method_ordering());
     // 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 (LinkWellKnownClasses || is_anonymous())  // I am well known to myself
       cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
     this_klass->set_protection_domain(protection_domain());
     this_klass->set_fields_annotations(fields_annotations());
     this_klass->set_methods_annotations(methods_annotations());
     this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
     this_klass->set_methods_default_annotations(methods_default_annotations());
     this_klass->set_minor_version(minor_version);
     this_klass->set_major_version(major_version);
     // Set up methodOop::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 (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) {
       for (int j = 0; j < methods->length(); j++) {
         ((methodOop)methods->obj_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);
     }
     // 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
     }
     // Additional attributes
     parse_classfile_attributes(cp, this_klass, 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));
     // Initialize static fields
     this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle));
     // VerifyOops believes that once this has been set, the object is completely loaded.
     // Compute transitive closure of interfaces this class implements
     this_klass->set_transitive_interfaces(transitive_interfaces());
     // 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);
     // Do final class setup
     fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
     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()) {
       check_illegal_static_method(this_klass, CHECK_(nullHandle));
     }
     ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
                                              false /* not shared class */);
     if (TraceClassLoading) {
       // 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()) {
           klassOop 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 {
         ResourceMark rm;
         tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
                    instanceKlass::cast(class_loader->klass())->external_name());
       }
     }
     if (TraceClassResolution) {
       // print out the superclass.
       const char * from = Klass::cast(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.
       objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
       if (!local_interfaces.is_null()) {
         int length = local_interfaces->length();
         for (int i = 0; i < length; i++) {
           klassOop k = klassOop(local_interfaces->obj_at(i));
           instanceKlass* to_class = instanceKlass::cast(k);
           const char * to = to_class->external_name();
           tty->print("RESOLVE %s %s (interface)\n", from, to);
         }
       }
     }
 #ifndef PRODUCT
     if( PrintCompactFieldsSavings ) {
       if( nonstatic_field_size < orig_nonstatic_field_size ) {
         tty->print("[Saved %d of %d bytes in %s]\n",
                  (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize,
                  orig_nonstatic_field_size*heapOopSize,
                  this_klass->external_name());
       } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
         tty->print("[Wasted %d over %d bytes in %s]\n",
                  (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize,
                  orig_nonstatic_field_size*heapOopSize,
                  this_klass->external_name());
       }
     }
 #endif
     // preserve result across HandleMark
     preserve_this_klass = this_klass();
   }
   // Create new handle outside HandleMark
   instanceKlassHandle this_klass (THREAD, preserve_this_klass);
   debug_only(this_klass->as_klassOop()->verify();)
   return this_klass;
 }
 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) {
   klassOop 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->klass_part()->has_finalizer())) {
       k->set_has_finalizer();
     }
   }
 #ifdef ASSERT
   bool f = false;
   methodOop 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 (Klass::cast(super)->has_vanilla_constructor() &&
         _has_vanilla_constructor) {
       k->set_has_vanilla_constructor();
     }
 #ifdef ASSERT
     bool v = false;
     if (Klass::cast(super)->has_vanilla_constructor()) {
       methodOop 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);
   }
 }
 // utility method for appending and array with check for duplicates
 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
   // iterate over new interfaces
   for (int i = 0; i < ifs->length(); i++) {
     oop e = ifs->obj_at(i);
     assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
     // check for duplicates
     bool duplicate = false;
     for (int j = 0; j < index; j++) {
       if (result->obj_at(j) == e) {
         duplicate = true;
         break;
       }
     }
     // add new interface
     if (!duplicate) {
       result->obj_at_put(index++, e);
     }
   }
 }
 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle 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++) {
     klassOop l = klassOop(local_ifs->obj_at(i));
     max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
   }
   // Finally add local interfaces
   max_transitive_size += local_size;
   // Construct array
   objArrayHandle result;
   if (max_transitive_size == 0) {
     // no interfaces, use canonicalized array
     result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
   } else if (max_transitive_size == super_size) {
     // no new local interfaces added, share superklass' transitive interface array
     result = objArrayHandle(THREAD, super->transitive_interfaces());
   } else if (max_transitive_size == local_size) {
     // only local interfaces added, share local interface array
     result = local_ifs;
   } else {
     objArrayHandle nullHandle;
     objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
     result = objArrayHandle(THREAD, new_objarray);
     int index = 0;
     // Copy down from superclass
     if (super.not_null()) {
       append_interfaces(result, index, super->transitive_interfaces());
     }
     // Copy down from local interfaces' superinterfaces
     for (int i = 0; i < local_ifs->length(); i++) {
       klassOop l = klassOop(local_ifs->obj_at(i));
       append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
     }
     // Finally add local interfaces
     append_interfaces(result, index, local_ifs());
     // Check if duplicates were removed
     if (index != max_transitive_size) {
       assert(index < max_transitive_size, "just checking");
       objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
       for (int i = 0; i < index; i++) {
         oop e = result->obj_at(i);
         assert(e != NULL, "just checking");
         new_result->obj_at_put(i, e);
       }
       result = objArrayHandle(THREAD, new_result);
     }
   }
   return result;
 }
 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
   klassOop super = this_klass->super();
   if ((super != NULL) &&
       (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
     ResourceMark rm(THREAD);
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbolHandles::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) {
   objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
   int lng = local_interfaces->length();
   for (int i = lng - 1; i >= 0; i--) {
     klassOop k = klassOop(local_interfaces->obj_at(i));
     assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
     if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
       ResourceMark rm(THREAD);
       Exceptions::fthrow(
         THREAD_AND_LOCATION,
         vmSymbolHandles::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) {
   objArrayHandle methods (THREAD, 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++) {
     methodOop m = (methodOop)methods->obj_at(index);
     // skip private, static and <init> methods
     if ((!m->is_private()) &&
         (!m->is_static()) &&
         (m->name() != vmSymbols::object_initializer_name())) {
       symbolOop name = m->name();
       symbolOop signature = m->signature();
       klassOop k = this_klass->super();
       methodOop super_m = NULL;
       while (k != NULL) {
         // skip supers that don't have final methods.
         if (k->klass_part()->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->as_klassOop(),
                                                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,
               vmSymbolHandles::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 = instanceKlass::cast(super_m->method_holder())->super();
           continue;
         }
         k = k->klass_part()->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");
   objArrayHandle methods (THREAD, this_klass->methods());
   int num_methods = methods->length();
   for (int index = 0; index < num_methods; index++) {
     methodOop m = (methodOop)methods->obj_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,
         vmSymbolHandles::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,
       vmSymbolHandles::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,
       vmSymbolHandles::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, symbolHandle 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 major_gte_15    = _major_version >= JAVA_1_5_VERSION;
   const bool is_initializer  = (name == vmSymbols::object_initializer_name());
   bool is_illegal = false;
   if (is_interface) {
     if (!is_abstract || !is_public || is_static || is_final ||
         is_native || (major_gte_15 && (is_synchronized || is_strict))) {
       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,
       vmSymbolHandles::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(symbolHandle 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,
       vmSymbolHandles::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(symbolHandle 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,
       vmSymbolHandles::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(symbolHandle name, TRAPS) {
   if (!_need_verify || _relax_verify) { return; }
   assert(!name.is_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,
       vmSymbolHandles::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(symbolHandle name, symbolHandle 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(symbolHandle name, symbolHandle 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,
                              vmSymbolHandles::isJavaIdentifierStart_name(),
                              vmSymbolHandles::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,
                                vmSymbolHandles::isJavaIdentifierPart_name(),
                                vmSymbolHandles::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@ef3c5db0b3ae (annotated)

src/share/vm/classfile/classFileParser.cpp