text: // Copyright 2012 the V8 project authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "src/objects.h"
  
  #include <iomanip>
  #include <memory>
  
  #include "src/bootstrapper.h"
  #include "src/disasm.h"
  #include "src/disassembler.h"
  #include "src/interpreter/bytecodes.h"
  #include "src/objects-inl.h"
  #include "src/ostreams.h"
  #include "src/regexp/jsregexp.h"
  
  namespace v8 {
  namespace internal {
  
  #ifdef OBJECT_PRINT
  
  void Object::Print() {
    OFStream os(stdout);
    this->Print(os);
    os << std::flush;
  }
  
  
  void Object::Print(std::ostream& os) {  // NOLINT
    if (IsSmi()) {
      os << "Smi: " << std::hex << "0x" << Smi::cast(this)->value();
      os << std::dec << " (" << Smi::cast(this)->value() << ")\n";
    } else {
      HeapObject::cast(this)->HeapObjectPrint(os);
    }
  }
  
  
  void HeapObject::PrintHeader(std::ostream& os, const char* id) {  // NOLINT
    os << reinterpret_cast<void*>(this) << ": [";
    if (id != nullptr) {
      os << id;
    } else {
      os << map()->instance_type();
    }
    os << "]";
  }
  
  
  void HeapObject::HeapObjectPrint(std::ostream& os) {  // NOLINT
    InstanceType instance_type = map()->instance_type();
  
    HandleScope scope(GetIsolate());
    if (instance_type < FIRST_NONSTRING_TYPE) {
      String::cast(this)->StringPrint(os);
      os << "\n";
      return;
    }
  
    switch (instance_type) {
      case SYMBOL_TYPE:
        Symbol::cast(this)->SymbolPrint(os);
        break;
      case MAP_TYPE:
        Map::cast(this)->MapPrint(os);
        break;
      case HEAP_NUMBER_TYPE:
        HeapNumber::cast(this)->HeapNumberPrint(os);
        os << "\n";
        break;
      case MUTABLE_HEAP_NUMBER_TYPE:
        os << "<mutable ";
        HeapNumber::cast(this)->HeapNumberPrint(os);
        os << ">\n";
        break;
      case FIXED_DOUBLE_ARRAY_TYPE:
        FixedDoubleArray::cast(this)->FixedDoubleArrayPrint(os);
        break;
      case FIXED_ARRAY_TYPE:
        FixedArray::cast(this)->FixedArrayPrint(os);
        break;
      case BYTE_ARRAY_TYPE:
        ByteArray::cast(this)->ByteArrayPrint(os);
        break;
      case BYTECODE_ARRAY_TYPE:
        BytecodeArray::cast(this)->BytecodeArrayPrint(os);
        break;
      case TRANSITION_ARRAY_TYPE:
        TransitionArray::cast(this)->TransitionArrayPrint(os);
        break;
      case FREE_SPACE_TYPE:
        FreeSpace::cast(this)->FreeSpacePrint(os);
        break;
  
  #define PRINT_FIXED_TYPED_ARRAY(Type, type, TYPE, ctype, size) \
    case Fixed##Type##Array::kInstanceType:                      \
      Fixed##Type##Array::cast(this)->FixedTypedArrayPrint(os);  \
      break;
  
      TYPED_ARRAYS(PRINT_FIXED_TYPED_ARRAY)
  #undef PRINT_FIXED_TYPED_ARRAY
  
      case JS_TYPED_ARRAY_KEY_ITERATOR_TYPE:
      case JS_FAST_ARRAY_KEY_ITERATOR_TYPE:
      case JS_GENERIC_ARRAY_KEY_ITERATOR_TYPE:
      case JS_INT8_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_UINT8_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_INT16_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_UINT16_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_INT32_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_UINT32_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_FLOAT32_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_FLOAT64_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_UINT8_CLAMPED_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_FAST_SMI_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_FAST_HOLEY_SMI_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_FAST_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_FAST_HOLEY_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_FAST_DOUBLE_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_FAST_HOLEY_DOUBLE_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_GENERIC_ARRAY_KEY_VALUE_ITERATOR_TYPE:
      case JS_INT8_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_UINT8_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_INT16_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_UINT16_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_INT32_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_UINT32_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_FLOAT32_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_FLOAT64_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_UINT8_CLAMPED_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_FAST_SMI_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_FAST_HOLEY_SMI_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_FAST_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_FAST_HOLEY_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_FAST_DOUBLE_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_FAST_HOLEY_DOUBLE_ARRAY_VALUE_ITERATOR_TYPE:
      case JS_GENERIC_ARRAY_VALUE_ITERATOR_TYPE:
        JSArrayIterator::cast(this)->JSArrayIteratorPrint(os);
        break;
  
      case FILLER_TYPE:
        os << "filler";
        break;
      case JS_OBJECT_TYPE:  // fall through
      case JS_API_OBJECT_TYPE:
      case JS_SPECIAL_API_OBJECT_TYPE:
      case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
      case JS_GENERATOR_OBJECT_TYPE:
      case JS_ARGUMENTS_TYPE:
      case JS_ERROR_TYPE:
      case JS_PROMISE_CAPABILITY_TYPE:
        JSObject::cast(this)->JSObjectPrint(os);
        break;
      case JS_PROMISE_TYPE:
        JSPromise::cast(this)->JSPromisePrint(os);
        break;
      case JS_ARRAY_TYPE:
        JSArray::cast(this)->JSArrayPrint(os);
        break;
      case JS_REGEXP_TYPE:
        JSRegExp::cast(this)->JSRegExpPrint(os);
        break;
      case ODDBALL_TYPE:
        Oddball::cast(this)->to_string()->Print(os);
        break;
      case JS_BOUND_FUNCTION_TYPE:
        JSBoundFunction::cast(this)->JSBoundFunctionPrint(os);
        break;
      case JS_FUNCTION_TYPE:
        JSFunction::cast(this)->JSFunctionPrint(os);
        break;
      case JS_GLOBAL_PROXY_TYPE:
        JSGlobalProxy::cast(this)->JSGlobalProxyPrint(os);
        break;
      case JS_GLOBAL_OBJECT_TYPE:
        JSGlobalObject::cast(this)->JSGlobalObjectPrint(os);
        break;
      case JS_VALUE_TYPE:
        JSValue::cast(this)->JSValuePrint(os);
        break;
      case JS_DATE_TYPE:
        JSDate::cast(this)->JSDatePrint(os);
        break;
      case CODE_TYPE:
        Code::cast(this)->CodePrint(os);
        break;
      case JS_PROXY_TYPE:
        JSProxy::cast(this)->JSProxyPrint(os);
        break;
      case JS_SET_TYPE:
        JSSet::cast(this)->JSSetPrint(os);
        break;
      case JS_MAP_TYPE:
        JSMap::cast(this)->JSMapPrint(os);
        break;
      case JS_SET_ITERATOR_TYPE:
        JSSetIterator::cast(this)->JSSetIteratorPrint(os);
        break;
      case JS_MAP_ITERATOR_TYPE:
        JSMapIterator::cast(this)->JSMapIteratorPrint(os);
        break;
      case JS_WEAK_MAP_TYPE:
        JSWeakMap::cast(this)->JSWeakMapPrint(os);
        break;
      case JS_WEAK_SET_TYPE:
        JSWeakSet::cast(this)->JSWeakSetPrint(os);
        break;
      case JS_MODULE_NAMESPACE_TYPE:
        JSModuleNamespace::cast(this)->JSModuleNamespacePrint(os);
        break;
      case FOREIGN_TYPE:
        Foreign::cast(this)->ForeignPrint(os);
        break;
      case SHARED_FUNCTION_INFO_TYPE:
        SharedFunctionInfo::cast(this)->SharedFunctionInfoPrint(os);
        break;
      case JS_MESSAGE_OBJECT_TYPE:
        JSMessageObject::cast(this)->JSMessageObjectPrint(os);
        break;
      case CELL_TYPE:
        Cell::cast(this)->CellPrint(os);
        break;
      case PROPERTY_CELL_TYPE:
        PropertyCell::cast(this)->PropertyCellPrint(os);
        break;
      case WEAK_CELL_TYPE:
        WeakCell::cast(this)->WeakCellPrint(os);
        break;
      case JS_ARRAY_BUFFER_TYPE:
        JSArrayBuffer::cast(this)->JSArrayBufferPrint(os);
        break;
      case JS_TYPED_ARRAY_TYPE:
        JSTypedArray::cast(this)->JSTypedArrayPrint(os);
        break;
      case JS_DATA_VIEW_TYPE:
        JSDataView::cast(this)->JSDataViewPrint(os);
        break;
  #define MAKE_STRUCT_CASE(NAME, Name, name) \
    case NAME##_TYPE:                        \
      Name::cast(this)->Name##Print(os);     \
      break;
    STRUCT_LIST(MAKE_STRUCT_CASE)
  #undef MAKE_STRUCT_CASE
  
      default:
        os << "UNKNOWN TYPE " << map()->instance_type();
        UNREACHABLE();
        break;
    }
  }
  
  void ByteArray::ByteArrayPrint(std::ostream& os) {  // NOLINT
    os << "byte array, data starts at " << GetDataStartAddress();
  }
  
  
  void BytecodeArray::BytecodeArrayPrint(std::ostream& os) {  // NOLINT
    Disassemble(os);
  }
  
  
  void FreeSpace::FreeSpacePrint(std::ostream& os) {  // NOLINT
    os << "free space, size " << Size();
  }
  
  
  template <class Traits>
  void FixedTypedArray<Traits>::FixedTypedArrayPrint(
      std::ostream& os) {  // NOLINT
    os << "fixed " << Traits::Designator();
  }
  
  bool JSObject::PrintProperties(std::ostream& os) {  // NOLINT
    if (HasFastProperties()) {
      DescriptorArray* descs = map()->instance_descriptors();
      int i = 0;
      for (; i < map()->NumberOfOwnDescriptors(); i++) {
        os << "\n    ";
        descs->GetKey(i)->NamePrint(os);
        os << ": ";
        PropertyDetails details = descs->GetDetails(i);
        switch (details.location()) {
          case kField: {
            FieldIndex field_index = FieldIndex::ForDescriptor(map(), i);
            if (IsUnboxedDoubleField(field_index)) {
              os << "<unboxed double> " << RawFastDoublePropertyAt(field_index);
            } else {
              os << Brief(RawFastPropertyAt(field_index));
            }
            break;
          }
          case kDescriptor:
            os << Brief(descs->GetValue(i));
            break;
        }
        os << " ";
        details.PrintAsFastTo(os, PropertyDetails::kForProperties);
      }
      return i > 0;
    } else if (IsJSGlobalObject()) {
      global_dictionary()->Print(os);
    } else {
      property_dictionary()->Print(os);
    }
    return true;
  }
  
  namespace {
  
  template <class T>
  bool IsTheHoleAt(T* array, int index) {
    return false;
  }
  
  template <>
  bool IsTheHoleAt(FixedDoubleArray* array, int index) {
    return array->is_the_hole(index);
  }
  
  template <class T>
  double GetScalarElement(T* array, int index) {
    if (IsTheHoleAt(array, index)) {
      return std::numeric_limits<double>::quiet_NaN();
    }
    return array->get_scalar(index);
  }
  
  template <class T>
  void DoPrintElements(std::ostream& os, Object* object) {  // NOLINT
    const bool print_the_hole = std::is_same<T, FixedDoubleArray>::value;
    T* array = T::cast(object);
    if (array->length() == 0) return;
    int previous_index = 0;
    double previous_value = GetScalarElement(array, 0);
    double value = 0.0;
    int i;
    for (i = 1; i <= array->length(); i++) {
      if (i < array->length()) value = GetScalarElement(array, i);
      bool values_are_nan = std::isnan(previous_value) && std::isnan(value);
      if (i != array->length() && (previous_value == value || values_are_nan) &&
          IsTheHoleAt(array, i - 1) == IsTheHoleAt(array, i)) {
        continue;
      }
      os << "\n";
      std::stringstream ss;
      ss << previous_index;
      if (previous_index != i - 1) {
        ss << '-' << (i - 1);
      }
      os << std::setw(12) << ss.str() << ": ";
      if (print_the_hole && IsTheHoleAt(array, i - 1)) {
        os << "<the_hole>";
      } else {
        os << previous_value;
      }
      previous_index = i;
      previous_value = value;
    }
  }
  
  void PrintFixedArrayElements(std::ostream& os, FixedArray* array) {
    // Print in array notation for non-sparse arrays.
    Object* previous_value = array->length() > 0 ? array->get(0) : nullptr;
    Object* value = nullptr;
    int previous_index = 0;
    int i;
    for (i = 1; i <= array->length(); i++) {
      if (i < array->length()) value = array->get(i);
      if (previous_value == value && i != array->length()) {
        continue;
      }
      os << "\n";
      std::stringstream ss;
      ss << previous_index;
      if (previous_index != i - 1) {
        ss << '-' << (i - 1);
      }
      os << std::setw(12) << ss.str() << ": " << Brief(previous_value);
      previous_index = i;
      previous_value = value;
    }
  }
  
  }  // namespace
  
  bool JSObject::PrintElements(std::ostream& os) {  // NOLINT
    // Don't call GetElementsKind, its validation code can cause the printer to
    // fail when debugging.
    if (elements()->length() == 0) return false;
    switch (map()->elements_kind()) {
      case FAST_HOLEY_SMI_ELEMENTS:
      case FAST_SMI_ELEMENTS:
      case FAST_HOLEY_ELEMENTS:
      case FAST_ELEMENTS:
      case FAST_STRING_WRAPPER_ELEMENTS: {
        PrintFixedArrayElements(os, FixedArray::cast(elements()));
        break;
      }
      case FAST_HOLEY_DOUBLE_ELEMENTS:
      case FAST_DOUBLE_ELEMENTS: {
        DoPrintElements<FixedDoubleArray>(os, elements());
        break;
      }
  
  #define PRINT_ELEMENTS(Type, type, TYPE, elementType, size) \
    case TYPE##_ELEMENTS: {                                   \
      DoPrintElements<Fixed##Type##Array>(os, elements());    \
      break;                                                  \
    }
        TYPED_ARRAYS(PRINT_ELEMENTS)
  #undef PRINT_ELEMENTS
  
      case DICTIONARY_ELEMENTS:
      case SLOW_STRING_WRAPPER_ELEMENTS:
        SeededNumberDictionary::cast(elements())->Print(os);
        break;
      case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
      case SLOW_SLOPPY_ARGUMENTS_ELEMENTS: {
        FixedArray* p = FixedArray::cast(elements());
        os << "\n   parameter map:";
        for (int i = 2; i < p->length(); i++) {
          os << " " << (i - 2) << ":" << Brief(p->get(i));
        }
        os << "\n   context: " << Brief(p->get(0))
           << "\n   arguments: " << Brief(p->get(1));
        break;
      }
      case NO_ELEMENTS:
        break;
    }
    return true;
  }
  
  
  static void JSObjectPrintHeader(std::ostream& os, JSObject* obj,
                                  const char* id) {  // NOLINT
    obj->PrintHeader(os, id);
    // Don't call GetElementsKind, its validation code can cause the printer to
    // fail when debugging.
    os << "\n - map = " << reinterpret_cast<void*>(obj->map()) << " [";
    if (obj->HasFastProperties()) {
      os << "FastProperties";
    } else {
      os << "DictionaryProperties";
    }
    PrototypeIterator iter(obj->GetIsolate(), obj);
    os << "]\n - prototype = " << reinterpret_cast<void*>(iter.GetCurrent());
    os << "\n - elements = " << Brief(obj->elements()) << " ["
       << ElementsKindToString(obj->map()->elements_kind());
    if (obj->elements()->map() == obj->GetHeap()->fixed_cow_array_map()) {
      os << " (COW)";
    }
    os << "]";
    if (obj->GetInternalFieldCount() > 0) {
      os << "\n - internal fields: " << obj->GetInternalFieldCount();
    }
  }
  
  
  static void JSObjectPrintBody(std::ostream& os, JSObject* obj,  // NOLINT
                                bool print_elements = true) {
    os << "\n - properties = " << Brief(obj->properties()) << " {";
    if (obj->PrintProperties(os)) os << "\n ";
    os << "}\n";
    if (print_elements && obj->elements()->length() > 0) {
      os << " - elements = " << Brief(obj->elements()) << " {";
      if (obj->PrintElements(os)) os << "\n ";
      os << "}\n";
    }
    int internal_fields = obj->GetInternalFieldCount();
    if (internal_fields > 0) {
      os << " - internal fields = {";
      for (int i = 0; i < internal_fields; i++) {
        os << "\n    " << Brief(obj->GetInternalField(i));
      }
      os << "\n }\n";
    }
  }
  
  
  void JSObject::JSObjectPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, nullptr);
    JSObjectPrintBody(os, this);
  }
  
  void JSArray::JSArrayPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSArray");
    os << "\n - length = " << Brief(this->length());
    JSObjectPrintBody(os, this);
  }
  
  void JSPromise::JSPromisePrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSPromise");
    os << "\n - status = " << JSPromise::Status(status());
    os << "\n - result = " << Brief(result());
    os << "\n - deferred_promise: " << Brief(deferred_promise());
    os << "\n - deferred_on_resolve: " << Brief(deferred_on_resolve());
    os << "\n - deferred_on_reject: " << Brief(deferred_on_reject());
    os << "\n - fulfill_reactions = " << Brief(fulfill_reactions());
    os << "\n - reject_reactions = " << Brief(reject_reactions());
    os << "\n - has_handler = " << has_handler();
    os << "\n ";
  }
  
  void JSRegExp::JSRegExpPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSRegExp");
    os << "\n - data = " << Brief(data());
    os << "\n - source = " << Brief(source());
    JSObjectPrintBody(os, this);
  }
  
  
  void Symbol::SymbolPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "Symbol");
    os << "\n - hash: " << Hash();
    os << "\n - name: " << Brief(name());
    if (name()->IsUndefined(GetIsolate())) {
      os << " (" << PrivateSymbolToName() << ")";
    }
    os << "\n - private: " << is_private();
    os << "\n";
  }
  
  
  void Map::MapPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "Map");
    os << "\n - type: " << instance_type();
    os << "\n - instance size: " << instance_size();
    if (IsJSObjectMap()) {
      os << "\n - inobject properties: " << GetInObjectProperties();
    }
    os << "\n - elements kind: " << ElementsKindToString(elements_kind());
    os << "\n - unused property fields: " << unused_property_fields();
    os << "\n - enum length: ";
    if (EnumLength() == kInvalidEnumCacheSentinel) {
      os << "invalid";
    } else {
      os << EnumLength();
    }
    if (is_deprecated()) os << "\n - deprecated_map";
    if (is_stable()) os << "\n - stable_map";
    if (is_migration_target()) os << "\n - migration_target";
    if (is_dictionary_map()) os << "\n - dictionary_map";
    if (has_hidden_prototype()) os << "\n - has_hidden_prototype";
    if (has_named_interceptor()) os << "\n - named_interceptor";
    if (has_indexed_interceptor()) os << "\n - indexed_interceptor";
    if (is_undetectable()) os << "\n - undetectable";
    if (is_callable()) os << "\n - callable";
    if (is_constructor()) os << "\n - constructor";
    if (is_access_check_needed()) os << "\n - access_check_needed";
    if (!is_extensible()) os << "\n - non-extensible";
    if (is_prototype_map()) {
      os << "\n - prototype_map";
      os << "\n - prototype info: " << Brief(prototype_info());
    } else {
      os << "\n - back pointer: " << Brief(GetBackPointer());
    }
    os << "\n - instance descriptors " << (owns_descriptors() ? "(own) " : "")
       << "#" << NumberOfOwnDescriptors() << ": "
       << Brief(instance_descriptors());
    if (FLAG_unbox_double_fields) {
      os << "\n - layout descriptor: ";
      layout_descriptor()->ShortPrint(os);
    }
    int nof_transitions = TransitionArray::NumberOfTransitions(raw_transitions());
    if (nof_transitions > 0) {
      os << "\n - transitions #" << nof_transitions << ": "
         << Brief(raw_transitions());
      TransitionArray::PrintTransitions(os, raw_transitions(), false);
    }
    os << "\n - prototype: " << Brief(prototype());
    os << "\n - constructor: " << Brief(GetConstructor());
    os << "\n - code cache: " << Brief(code_cache());
    os << "\n - dependent code: " << Brief(dependent_code());
    os << "\n - construction counter: " << construction_counter();
    os << "\n";
  }
  
  
  void TypeFeedbackInfo::TypeFeedbackInfoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "TypeFeedbackInfo");
    os << "\n - ic_total_count: " << ic_total_count()
       << ", ic_with_type_info_count: " << ic_with_type_info_count()
       << ", ic_generic_count: " << ic_generic_count() << "\n";
  }
  
  
  void AliasedArgumentsEntry::AliasedArgumentsEntryPrint(
      std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "AliasedArgumentsEntry");
    os << "\n - aliased_context_slot: " << aliased_context_slot();
  }
  
  
  void FixedArray::FixedArrayPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "FixedArray");
    os << "\n - map = " << Brief(map());
    os << "\n - length: " << length();
    PrintFixedArrayElements(os, this);
    os << "\n";
  }
  
  
  void FixedDoubleArray::FixedDoubleArrayPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "FixedDoubleArray");
    os << "\n - map = " << Brief(map());
    os << "\n - length: " << length();
    DoPrintElements<FixedDoubleArray>(os, this);
    os << "\n";
  }
  
  
  void TransitionArray::TransitionArrayPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "TransitionArray");
    os << "\n - capacity: " << length();
    for (int i = 0; i < length(); i++) {
      os << "\n  [" << i << "]: " << Brief(get(i));
      if (i == kNextLinkIndex) os << " (next link)";
      if (i == kPrototypeTransitionsIndex) os << " (prototype transitions)";
      if (i == kTransitionLengthIndex) os << " (number of transitions)";
    }
    os << "\n";
  }
  
  template void FeedbackVectorSpecBase<StaticFeedbackVectorSpec>::Print();
  template void FeedbackVectorSpecBase<FeedbackVectorSpec>::Print();
  
  template <typename Derived>
  void FeedbackVectorSpecBase<Derived>::Print() {
    OFStream os(stdout);
    FeedbackVectorSpecPrint(os);
    os << std::flush;
  }
  
  template <typename Derived>
  void FeedbackVectorSpecBase<Derived>::FeedbackVectorSpecPrint(
      std::ostream& os) {  // NOLINT
    int slot_count = This()->slots();
    os << " - slot_count: " << slot_count;
    if (slot_count == 0) {
      os << " (empty)\n";
      return;
    }
  
    for (int slot = 0; slot < slot_count;) {
      FeedbackSlotKind kind = This()->GetKind(FeedbackSlot(slot));
      int entry_size = FeedbackMetadata::GetSlotSize(kind);
      DCHECK_LT(0, entry_size);
      os << "\n Slot #" << slot << " " << kind;
      slot += entry_size;
    }
    os << "\n";
  }
  
  void FeedbackMetadata::Print() {
    OFStream os(stdout);
    FeedbackMetadataPrint(os);
    os << std::flush;
  }
  
  void FeedbackMetadata::FeedbackMetadataPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "FeedbackMetadata");
    os << "\n - length: " << length();
    if (length() == 0) {
      os << " (empty)\n";
      return;
    }
    os << "\n - slot_count: " << slot_count();
  
    FeedbackMetadataIterator iter(this);
    while (iter.HasNext()) {
      FeedbackSlot slot = iter.Next();
      FeedbackSlotKind kind = iter.kind();
      os << "\n Slot " << slot << " " << kind;
    }
    os << "\n";
  }
  
  void FeedbackVector::Print() {
    OFStream os(stdout);
    FeedbackVectorPrint(os);
    os << std::flush;
  }
  
  void FeedbackVector::FeedbackVectorPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "FeedbackVector");
    os << "\n - length: " << length();
    if (length() == 0) {
      os << " (empty)\n";
      return;
    }
  
    FeedbackMetadataIterator iter(metadata());
    while (iter.HasNext()) {
      FeedbackSlot slot = iter.Next();
      FeedbackSlotKind kind = iter.kind();
  
      os << "\n Slot " << slot << " " << kind;
      os << " ";
      switch (kind) {
        case FeedbackSlotKind::kLoadProperty: {
          LoadICNexus nexus(this, slot);
          os << Code::ICState2String(nexus.StateFromFeedback());
          break;
        }
        case FeedbackSlotKind::kLoadGlobalInsideTypeof:
        case FeedbackSlotKind::kLoadGlobalNotInsideTypeof: {
          LoadGlobalICNexus nexus(this, slot);
          os << Code::ICState2String(nexus.StateFromFeedback());
          break;
        }
        case FeedbackSlotKind::kLoadKeyed: {
          KeyedLoadICNexus nexus(this, slot);
          os << Code::ICState2String(nexus.StateFromFeedback());
          break;
        }
        case FeedbackSlotKind::kCall: {
          CallICNexus nexus(this, slot);
          os << Code::ICState2String(nexus.StateFromFeedback());
          break;
        }
        case FeedbackSlotKind::kStoreNamedSloppy:
        case FeedbackSlotKind::kStoreNamedStrict:
        case FeedbackSlotKind::kStoreOwnNamed: {
          StoreICNexus nexus(this, slot);
          os << Code::ICState2String(nexus.StateFromFeedback());
          break;
        }
        case FeedbackSlotKind::kStoreKeyedSloppy:
        case FeedbackSlotKind::kStoreKeyedStrict: {
          KeyedStoreICNexus nexus(this, slot);
          os << Code::ICState2String(nexus.StateFromFeedback());
          break;
        }
        case FeedbackSlotKind::kBinaryOp: {
          BinaryOpICNexus nexus(this, slot);
          os << Code::ICState2String(nexus.StateFromFeedback());
          break;
        }
        case FeedbackSlotKind::kCompareOp: {
          CompareICNexus nexus(this, slot);
          os << Code::ICState2String(nexus.StateFromFeedback());
          break;
        }
        case FeedbackSlotKind::kStoreDataPropertyInLiteral: {
          StoreDataPropertyInLiteralICNexus nexus(this, slot);
          os << Code::ICState2String(nexus.StateFromFeedback());
          break;
        }
        case FeedbackSlotKind::kCreateClosure:
        case FeedbackSlotKind::kLiteral:
        case FeedbackSlotKind::kGeneral:
          break;
        case FeedbackSlotKind::kToBoolean:
        case FeedbackSlotKind::kInvalid:
        case FeedbackSlotKind::kKindsNumber:
          UNREACHABLE();
          break;
      }
  
      int entry_size = iter.entry_size();
      for (int i = 0; i < entry_size; i++) {
        int index = GetIndex(slot) + i;
        os << "\n  [" << index << "]: " << Brief(get(index));
      }
    }
    os << "\n";
  }
  
  
  void JSValue::JSValuePrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSValue");
    os << "\n - value = " << Brief(value());
    JSObjectPrintBody(os, this);
  }
  
  
  void JSMessageObject::JSMessageObjectPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSMessageObject");
    os << "\n - type: " << type();
    os << "\n - arguments: " << Brief(argument());
    os << "\n - start_position: " << start_position();
    os << "\n - end_position: " << end_position();
    os << "\n - script: " << Brief(script());
    os << "\n - stack_frames: " << Brief(stack_frames());
    JSObjectPrintBody(os, this);
  }
  
  
  void String::StringPrint(std::ostream& os) {  // NOLINT
    if (StringShape(this).IsInternalized()) {
      os << "#";
    } else if (StringShape(this).IsCons()) {
      os << "c\"";
    } else if (StringShape(this).IsThin()) {
      os << ">\"";
    } else {
      os << "\"";
    }
  
    const char truncated_epilogue[] = "...<truncated>";
    int len = length();
    if (!FLAG_use_verbose_printer) {
      if (len > 100) {
        len = 100 - sizeof(truncated_epilogue);
      }
    }
    for (int i = 0; i < len; i++) {
      os << AsUC16(Get(i));
    }
    if (len != length()) {
      os << truncated_epilogue;
    }
  
    if (!StringShape(this).IsInternalized()) os << "\"";
  }
  
  
  void Name::NamePrint(std::ostream& os) {  // NOLINT
    if (IsString()) {
      String::cast(this)->StringPrint(os);
    } else {
      os << Brief(this);
    }
  }
  
  
  static const char* const weekdays[] = {
    "???", "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
  };
  
  
  void JSDate::JSDatePrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSDate");
    os << "\n - value = " << Brief(value());
    if (!year()->IsSmi()) {
      os << "\n - time = NaN\n";
    } else {
      // TODO(svenpanne) Add some basic formatting to our streams.
      ScopedVector<char> buf(100);
      SNPrintF(
          buf, "\n - time = %s %04d/%02d/%02d %02d:%02d:%02d\n",
          weekdays[weekday()->IsSmi() ? Smi::cast(weekday())->value() + 1 : 0],
          year()->IsSmi() ? Smi::cast(year())->value() : -1,
          month()->IsSmi() ? Smi::cast(month())->value() : -1,
          day()->IsSmi() ? Smi::cast(day())->value() : -1,
          hour()->IsSmi() ? Smi::cast(hour())->value() : -1,
          min()->IsSmi() ? Smi::cast(min())->value() : -1,
          sec()->IsSmi() ? Smi::cast(sec())->value() : -1);
      os << buf.start();
    }
    JSObjectPrintBody(os, this);
  }
  
  
  void JSProxy::JSProxyPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "JSProxy");
    os << "\n - map = " << reinterpret_cast<void*>(map());
    os << "\n - target = ";
    target()->ShortPrint(os);
    os << "\n - handler = ";
    handler()->ShortPrint(os);
    os << "\n - hash = ";
    hash()->ShortPrint(os);
    os << "\n";
  }
  
  
  void JSSet::JSSetPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSSet");
    os << " - table = " << Brief(table());
    JSObjectPrintBody(os, this);
  }
  
  
  void JSMap::JSMapPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSMap");
    os << " - table = " << Brief(table());
    JSObjectPrintBody(os, this);
  }
  
  
  template <class Derived, class TableType>
  void
  OrderedHashTableIterator<Derived, TableType>::OrderedHashTableIteratorPrint(
      std::ostream& os) {  // NOLINT
    os << "\n - table = " << Brief(table());
    os << "\n - index = " << Brief(index());
    os << "\n - kind = " << Brief(kind());
    os << "\n";
  }
  
  
  template void OrderedHashTableIterator<
      JSSetIterator,
      OrderedHashSet>::OrderedHashTableIteratorPrint(std::ostream& os);  // NOLINT
  
  
  template void OrderedHashTableIterator<
      JSMapIterator,
      OrderedHashMap>::OrderedHashTableIteratorPrint(std::ostream& os);  // NOLINT
  
  
  void JSSetIterator::JSSetIteratorPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSSetIterator");
    OrderedHashTableIteratorPrint(os);
  }
  
  
  void JSMapIterator::JSMapIteratorPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSMapIterator");
    OrderedHashTableIteratorPrint(os);
  }
  
  
  void JSWeakMap::JSWeakMapPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSWeakMap");
    os << "\n - table = " << Brief(table());
    JSObjectPrintBody(os, this);
  }
  
  
  void JSWeakSet::JSWeakSetPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSWeakSet");
    os << "\n - table = " << Brief(table());
    JSObjectPrintBody(os, this);
  }
  
  
  void JSArrayBuffer::JSArrayBufferPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSArrayBuffer");
    os << "\n - backing_store = " << backing_store();
    os << "\n - byte_length = " << Brief(byte_length());
    if (was_neutered()) os << "\n - neutered";
    JSObjectPrintBody(os, this, !was_neutered());
  }
  
  
  void JSTypedArray::JSTypedArrayPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSTypedArray");
    os << "\n - buffer = " << Brief(buffer());
    os << "\n - byte_offset = " << Brief(byte_offset());
    os << "\n - byte_length = " << Brief(byte_length());
    os << "\n - length = " << Brief(length());
    if (WasNeutered()) os << "\n - neutered";
    JSObjectPrintBody(os, this, !WasNeutered());
  }
  
  void JSArrayIterator::JSArrayIteratorPrint(std::ostream& os) {  // NOLING
    JSObjectPrintHeader(os, this, "JSArrayIterator");
  
    InstanceType instance_type = map()->instance_type();
    std::string type;
    if (instance_type <= LAST_ARRAY_KEY_ITERATOR_TYPE) {
      type = "keys";
    } else if (instance_type <= LAST_ARRAY_KEY_VALUE_ITERATOR_TYPE) {
      type = "entries";
    } else {
      type = "values";
    }
  
    os << "\n - type = " << type;
    os << "\n - object = " << Brief(object());
    os << "\n - index = " << Brief(index());
  
    JSObjectPrintBody(os, this);
  }
  
  void JSDataView::JSDataViewPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSDataView");
    os << "\n - buffer =" << Brief(buffer());
    os << "\n - byte_offset = " << Brief(byte_offset());
    os << "\n - byte_length = " << Brief(byte_length());
    if (WasNeutered()) os << "\n - neutered";
    JSObjectPrintBody(os, this, !WasNeutered());
  }
  
  
  void JSBoundFunction::JSBoundFunctionPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSBoundFunction");
    os << "\n - bound_target_function = " << Brief(bound_target_function());
    os << "\n - bound_this = " << Brief(bound_this());
    os << "\n - bound_arguments = " << Brief(bound_arguments());
    JSObjectPrintBody(os, this);
  }
  
  
  void JSFunction::JSFunctionPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "Function");
    os << "\n - initial_map = ";
    if (has_initial_map()) os << Brief(initial_map());
    os << "\n - shared_info = " << Brief(shared());
    os << "\n - name = " << Brief(shared()->name());
    os << "\n - formal_parameter_count = "
       << shared()->internal_formal_parameter_count();
    if (IsGeneratorFunction(shared()->kind())) {
      os << "\n   - generator";
    } else if (IsAsyncFunction(shared()->kind())) {
      os << "\n   - async";
    }
    os << "\n - context = " << Brief(context());
    os << "\n - feedback vector cell = " << Brief(feedback_vector_cell());
    os << "\n - code = " << Brief(code());
    JSObjectPrintBody(os, this);
  }
  
  namespace {
  
  std::ostream& operator<<(std::ostream& os, FunctionKind kind) {
    os << "[";
    if (kind == FunctionKind::kNormalFunction) {
      os << " NormalFunction";
    } else {
  #define PRINT_FLAG(name)                                                  \
    if (static_cast<int>(kind) & static_cast<int>(FunctionKind::k##name)) { \
      os << " " << #name;                                                   \
    }
  
      PRINT_FLAG(ArrowFunction)
      PRINT_FLAG(GeneratorFunction)
      PRINT_FLAG(ConciseMethod)
      PRINT_FLAG(DefaultConstructor)
      PRINT_FLAG(DerivedConstructor)
      PRINT_FLAG(BaseConstructor)
      PRINT_FLAG(GetterFunction)
      PRINT_FLAG(SetterFunction)
      PRINT_FLAG(AsyncFunction)
      PRINT_FLAG(Module)
  #undef PRINT_FLAG
    }
    return os << " ]";
  }
  
  }  // namespace
  
  void SharedFunctionInfo::SharedFunctionInfoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "SharedFunctionInfo");
    os << "\n - name = " << Brief(name());
    os << "\n - kind = " << kind();
    os << "\n - formal_parameter_count = " << internal_formal_parameter_count();
    os << "\n - expected_nof_properties = " << expected_nof_properties();
    os << "\n - language_mode = " << language_mode();
    os << "\n - ast_node_count = " << ast_node_count();
    os << "\n - instance class name = ";
    instance_class_name()->Print(os);
    os << "\n - code = " << Brief(code());
    if (HasSourceCode()) {
      os << "\n - source code = ";
      String* source = String::cast(Script::cast(script())->source());
      int start = start_position();
      int length = end_position() - start;
      std::unique_ptr<char[]> source_string = source->ToCString(
          DISALLOW_NULLS, FAST_STRING_TRAVERSAL, start, length, NULL);
      os << source_string.get();
    }
    // Script files are often large, hard to read.
    // os << "\n - script =";
    // script()->Print(os);
    if (is_named_expression()) {
      os << "\n - named expression";
    } else if (is_anonymous_expression()) {
      os << "\n - anonymous expression";
    } else if (is_declaration()) {
      os << "\n - declaration";
    }
    os << "\n - function token position = " << function_token_position();
    os << "\n - start position = " << start_position();
    os << "\n - end position = " << end_position();
    if (HasDebugInfo()) {
      os << "\n - debug info = " << Brief(debug_info());
    } else {
      os << "\n - no debug info";
    }
    os << "\n - length = " << length();
    os << "\n - optimized_code_map = " << Brief(optimized_code_map());
    os << "\n - feedback_metadata = ";
    feedback_metadata()->FeedbackMetadataPrint(os);
    if (HasBytecodeArray()) {
      os << "\n - bytecode_array = " << bytecode_array();
    }
    os << "\n";
  }
  
  
  void JSGlobalProxy::JSGlobalProxyPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSGlobalProxy");
    if (!GetIsolate()->bootstrapper()->IsActive()) {
      os << "\n - native context = " << Brief(native_context());
    }
    os << "\n - hash = " << Brief(hash());
    JSObjectPrintBody(os, this);
  }
  
  
  void JSGlobalObject::JSGlobalObjectPrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSGlobalObject");
    if (!GetIsolate()->bootstrapper()->IsActive()) {
      os << "\n - native context = " << Brief(native_context());
    }
    os << "\n - global proxy = " << Brief(global_proxy());
    JSObjectPrintBody(os, this);
  }
  
  
  void Cell::CellPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "Cell");
    os << "\n - value: " << Brief(value());
    os << "\n";
  }
  
  
  void PropertyCell::PropertyCellPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "PropertyCell");
    os << "\n - value: " << Brief(value());
    os << "\n - details: ";
    property_details().PrintAsSlowTo(os);
    PropertyCellType cell_type = property_details().cell_type();
    os << "\n - cell_type: ";
    if (value()->IsTheHole(GetIsolate())) {
      switch (cell_type) {
        case PropertyCellType::kUninitialized:
          os << "Uninitialized";
          break;
        case PropertyCellType::kInvalidated:
          os << "Invalidated";
          break;
        default:
          os << "??? " << static_cast<int>(cell_type);
          break;
      }
    } else {
      switch (cell_type) {
        case PropertyCellType::kUndefined:
          os << "Undefined";
          break;
        case PropertyCellType::kConstant:
          os << "Constant";
          break;
        case PropertyCellType::kConstantType:
          os << "ConstantType"
             << " (";
          switch (GetConstantType()) {
            case PropertyCellConstantType::kSmi:
              os << "Smi";
              break;
            case PropertyCellConstantType::kStableMap:
              os << "StableMap";
              break;
          }
          os << ")";
          break;
        case PropertyCellType::kMutable:
          os << "Mutable";
          break;
      }
    }
    os << "\n";
  }
  
  
  void WeakCell::WeakCellPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "WeakCell");
    if (cleared()) {
      os << "\n - cleared";
    } else {
      os << "\n - value: " << Brief(value());
    }
    os << "\n";
  }
  
  
  void Code::CodePrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "Code");
    os << "\n";
  #ifdef ENABLE_DISASSEMBLER
    if (FLAG_use_verbose_printer) {
      Disassemble(NULL, os);
    }
  #endif
  }
  
  
  void Foreign::ForeignPrint(std::ostream& os) {  // NOLINT
    os << "foreign address : " << foreign_address();
    os << "\n";
  }
  
  
  void AccessorInfo::AccessorInfoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "AccessorInfo");
    os << "\n - name: " << Brief(name());
    os << "\n - flag: " << flag();
    os << "\n - getter: " << Brief(getter());
    os << "\n - setter: " << Brief(setter());
    os << "\n - js_getter: " << Brief(js_getter());
    os << "\n - data: " << Brief(data());
    os << "\n";
  }
  
  
  void PromiseResolveThenableJobInfo::PromiseResolveThenableJobInfoPrint(
      std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "PromiseResolveThenableJobInfo");
    os << "\n - thenable: " << Brief(thenable());
    os << "\n - then: " << Brief(then());
    os << "\n - resolve: " << Brief(resolve());
    os << "\n - reject: " << Brief(reject());
    os << "\n - context: " << Brief(context());
    os << "\n";
  }
  
  void PromiseReactionJobInfo::PromiseReactionJobInfoPrint(
      std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "PromiseReactionJobInfo");
    os << "\n - value: " << Brief(value());
    os << "\n - tasks: " << Brief(tasks());
    os << "\n - deferred_promise: " << Brief(deferred_promise());
    os << "\n - deferred_on_resolve: " << Brief(deferred_on_resolve());
    os << "\n - deferred_on_reject: " << Brief(deferred_on_reject());
    os << "\n - reaction context: " << Brief(context());
    os << "\n";
  }
  
  void ModuleInfoEntry::ModuleInfoEntryPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "ModuleInfoEntry");
    os << "\n - export_name: " << Brief(export_name());
    os << "\n - local_name: " << Brief(local_name());
    os << "\n - import_name: " << Brief(import_name());
    os << "\n - module_request: " << module_request();
    os << "\n - cell_index: " << cell_index();
    os << "\n - beg_pos: " << beg_pos();
    os << "\n - end_pos: " << end_pos();
    os << "\n";
  }
  
  void Module::ModulePrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "Module");
    // TODO(neis): Simplify once modules have a script field.
    if (!evaluated()) {
      SharedFunctionInfo* shared = code()->IsSharedFunctionInfo()
                                       ? SharedFunctionInfo::cast(code())
                                       : JSFunction::cast(code())->shared();
      Object* origin = Script::cast(shared->script())->GetNameOrSourceURL();
      os << "\n - origin: " << Brief(origin);
    }
    os << "\n - code: " << Brief(code());
    os << "\n - exports: " << Brief(exports());
    os << "\n - requested_modules: " << Brief(requested_modules());
    os << "\n - instantiated, evaluated: " << instantiated() << ", "
       << evaluated();
    os << "\n";
  }
  
  void JSModuleNamespace::JSModuleNamespacePrint(std::ostream& os) {  // NOLINT
    JSObjectPrintHeader(os, this, "JSModuleNamespace");
    os << "\n - module: " << Brief(module());
    JSObjectPrintBody(os, this);
  }
  
  void PrototypeInfo::PrototypeInfoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "PrototypeInfo");
    os << "\n - weak cell: " << Brief(weak_cell());
    os << "\n - prototype users: " << Brief(prototype_users());
    os << "\n - registry slot: " << registry_slot();
    os << "\n - validity cell: " << Brief(validity_cell());
    os << "\n - object create map: " << Brief(object_create_map());
    os << "\n";
  }
  
  void Tuple2::Tuple2Print(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "Tuple2");
    os << "\n - value1: " << Brief(value1());
    os << "\n - value2: " << Brief(value2());
    os << "\n";
  }
  
  void Tuple3::Tuple3Print(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "Tuple3");
    os << "\n - value1: " << Brief(value1());
    os << "\n - value2: " << Brief(value2());
    os << "\n - value3: " << Brief(value3());
    os << "\n";
  }
  
  void ContextExtension::ContextExtensionPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "ContextExtension");
    os << "\n - scope_info: " << Brief(scope_info());
    os << "\n - extension: " << Brief(extension());
    os << "\n";
  }
  
  void ConstantElementsPair::ConstantElementsPairPrint(
      std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "ConstantElementsPair");
    os << "\n - elements_kind: " << static_cast<ElementsKind>(elements_kind());
    os << "\n - constant_values: " << Brief(constant_values());
    os << "\n";
  }
  
  void AccessorPair::AccessorPairPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "AccessorPair");
    os << "\n - getter: " << Brief(getter());
    os << "\n - setter: " << Brief(setter());
    os << "\n";
  }
  
  
  void AccessCheckInfo::AccessCheckInfoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "AccessCheckInfo");
    os << "\n - callback: " << Brief(callback());
    os << "\n - named_interceptor: " << Brief(named_interceptor());
    os << "\n - indexed_interceptor: " << Brief(indexed_interceptor());
    os << "\n - data: " << Brief(data());
    os << "\n";
  }
  
  
  void InterceptorInfo::InterceptorInfoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "InterceptorInfo");
    os << "\n - getter: " << Brief(getter());
    os << "\n - setter: " << Brief(setter());
    os << "\n - query: " << Brief(query());
    os << "\n - deleter: " << Brief(deleter());
    os << "\n - enumerator: " << Brief(enumerator());
    os << "\n - data: " << Brief(data());
    os << "\n";
  }
  
  
  void CallHandlerInfo::CallHandlerInfoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "CallHandlerInfo");
    os << "\n - callback: " << Brief(callback());
    os << "\n - data: " << Brief(data());
    os << "\n";
  }
  
  
  void FunctionTemplateInfo::FunctionTemplateInfoPrint(
      std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "FunctionTemplateInfo");
    os << "\n - class name: " << Brief(class_name());
    os << "\n - tag: " << Brief(tag());
    os << "\n - serial_number: " << Brief(serial_number());
    os << "\n - property_list: " << Brief(property_list());
    os << "\n - call_code: " << Brief(call_code());
    os << "\n - property_accessors: " << Brief(property_accessors());
    os << "\n - prototype_template: " << Brief(prototype_template());
    os << "\n - parent_template: " << Brief(parent_template());
    os << "\n - named_property_handler: " << Brief(named_property_handler());
    os << "\n - indexed_property_handler: " << Brief(indexed_property_handler());
    os << "\n - instance_template: " << Brief(instance_template());
    os << "\n - signature: " << Brief(signature());
    os << "\n - access_check_info: " << Brief(access_check_info());
    os << "\n - cached_property_name: " << Brief(cached_property_name());
    os << "\n - hidden_prototype: " << (hidden_prototype() ? "true" : "false");
    os << "\n - undetectable: " << (undetectable() ? "true" : "false");
    os << "\n - need_access_check: " << (needs_access_check() ? "true" : "false");
    os << "\n - instantiated: " << (instantiated() ? "true" : "false");
    os << "\n";
  }
  
  
  void ObjectTemplateInfo::ObjectTemplateInfoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "ObjectTemplateInfo");
    os << "\n - tag: " << Brief(tag());
    os << "\n - serial_number: " << Brief(serial_number());
    os << "\n - property_list: " << Brief(property_list());
    os << "\n - property_accessors: " << Brief(property_accessors());
    os << "\n - constructor: " << Brief(constructor());
    os << "\n - internal_field_count: " << internal_field_count();
    os << "\n - immutable_proto: " << (immutable_proto() ? "true" : "false");
    os << "\n";
  }
  
  
  void AllocationSite::AllocationSitePrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "AllocationSite");
    os << "\n - weak_next: " << Brief(weak_next());
    os << "\n - dependent code: " << Brief(dependent_code());
    os << "\n - nested site: " << Brief(nested_site());
    os << "\n - memento found count: "
       << Brief(Smi::FromInt(memento_found_count()));
    os << "\n - memento create count: "
       << Brief(Smi::FromInt(memento_create_count()));
    os << "\n - pretenure decision: "
       << Brief(Smi::FromInt(pretenure_decision()));
    os << "\n - transition_info: ";
    if (transition_info()->IsSmi()) {
      ElementsKind kind = GetElementsKind();
      os << "Array allocation with ElementsKind " << ElementsKindToString(kind);
    } else if (transition_info()->IsJSArray()) {
      os << "Array literal " << Brief(transition_info());
    } else {
      os << "unknown transition_info " << Brief(transition_info());
    }
    os << "\n";
  }
  
  
  void AllocationMemento::AllocationMementoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "AllocationMemento");
    os << "\n - allocation site: ";
    if (IsValid()) {
      GetAllocationSite()->Print(os);
    } else {
      os << "<invalid>\n";
    }
  }
  
  
  void Script::ScriptPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "Script");
    os << "\n - source: " << Brief(source());
    os << "\n - name: " << Brief(name());
    os << "\n - line_offset: " << line_offset();
    os << "\n - column_offset: " << column_offset();
    os << "\n - type: " << type();
    os << "\n - id: " << id();
    os << "\n - context data: " << Brief(context_data());
    os << "\n - wrapper: " << Brief(wrapper());
    os << "\n - compilation type: " << compilation_type();
    os << "\n - line ends: " << Brief(line_ends());
    os << "\n - eval from shared: " << Brief(eval_from_shared());
    os << "\n - eval from position: " << eval_from_position();
    os << "\n - shared function infos: " << Brief(shared_function_infos());
    os << "\n";
  }
  
  
  void DebugInfo::DebugInfoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "DebugInfo");
    os << "\n - shared: " << Brief(shared());
    os << "\n - debug bytecode array: " << Brief(debug_bytecode_array());
    os << "\n - break_points: ";
    break_points()->Print(os);
  }
  
  
  void BreakPointInfo::BreakPointInfoPrint(std::ostream& os) {  // NOLINT
    HeapObject::PrintHeader(os, "BreakPointInfo");
    os << "\n - source_position: " << source_position();
    os << "\n - break_point_objects: " << Brief(break_point_objects());
    os << "\n";
  }
  
  
  static void PrintBitMask(std::ostream& os, uint32_t value) {  // NOLINT
    for (int i = 0; i < 32; i++) {
      if ((i & 7) == 0) os << " ";
      os << (((value & 1) == 0) ? "_" : "x");
      value >>= 1;
    }
  }
  
  
  void LayoutDescriptor::Print() {
    OFStream os(stdout);
    this->Print(os);
    os << std::flush;
  }
  
  void LayoutDescriptor::ShortPrint(std::ostream& os) {
    if (IsSmi()) {
      os << this;  // Print tagged value for easy use with "jld" gdb macro.
    } else {
      os << Brief(this);
    }
  }
  
  void LayoutDescriptor::Print(std::ostream& os) {  // NOLINT
    os << "Layout descriptor: ";
    if (IsFastPointerLayout()) {
      os << "<all tagged>";
    } else if (IsSmi()) {
      os << "fast";
      PrintBitMask(os, static_cast<uint32_t>(Smi::cast(this)->value()));
    } else if (IsOddball() &&
               IsUninitialized(HeapObject::cast(this)->GetIsolate())) {
      os << "<uninitialized>";
    } else {
      os << "slow";
      int len = length();
      for (int i = 0; i < len; i++) {
        if (i > 0) os << " |";
        PrintBitMask(os, get_scalar(i));
      }
    }
    os << "\n";
  }
  
  
  #endif  // OBJECT_PRINT
  
  
  #if TRACE_MAPS
  
  
  void Name::NameShortPrint() {
    if (this->IsString()) {
      PrintF("%s", String::cast(this)->ToCString().get());
    } else {
      DCHECK(this->IsSymbol());
      Symbol* s = Symbol::cast(this);
      if (s->name()->IsUndefined(GetIsolate())) {
        PrintF("#<%s>", s->PrivateSymbolToName());
      } else {
        PrintF("<%s>", String::cast(s->name())->ToCString().get());
      }
    }
  }
  
  
  int Name::NameShortPrint(Vector<char> str) {
    if (this->IsString()) {
      return SNPrintF(str, "%s", String::cast(this)->ToCString().get());
    } else {
      DCHECK(this->IsSymbol());
      Symbol* s = Symbol::cast(this);
      if (s->name()->IsUndefined(GetIsolate())) {
        return SNPrintF(str, "#<%s>", s->PrivateSymbolToName());
      } else {
        return SNPrintF(str, "<%s>", String::cast(s->name())->ToCString().get());
      }
    }
  }
  
  
  #endif  // TRACE_MAPS
  
  
  #if defined(DEBUG) || defined(OBJECT_PRINT)
  // This method is only meant to be called from gdb for debugging purposes.
  // Since the string can also be in two-byte encoding, non-Latin1 characters
  // will be ignored in the output.
  char* String::ToAsciiArray() {
    // Static so that subsequent calls frees previously allocated space.
    // This also means that previous results will be overwritten.
    static char* buffer = NULL;
    if (buffer != NULL) delete[] buffer;
    buffer = new char[length() + 1];
    WriteToFlat(this, reinterpret_cast<uint8_t*>(buffer), 0, length());
    buffer[length()] = 0;
    return buffer;
  }
  
  
  void DescriptorArray::Print() {
    OFStream os(stdout);
    this->PrintDescriptors(os);
    os << std::flush;
  }
  
  
  void DescriptorArray::PrintDescriptors(std::ostream& os) {  // NOLINT
    HandleScope scope(GetIsolate());
    os << "Descriptor array #" << number_of_descriptors() << ":";
    for (int i = 0; i < number_of_descriptors(); i++) {
      Name* key = GetKey(i);
      os << "\n  [" << i << "]: ";
  #ifdef OBJECT_PRINT
      key->NamePrint(os);
  #else
      key->ShortPrint(os);
  #endif
      os << " ";
      PrintDescriptorDetails(os, i, PropertyDetails::kPrintFull);
    }
    os << "\n";
  }
  
  void DescriptorArray::PrintDescriptorDetails(std::ostream& os, int descriptor,
                                               PropertyDetails::PrintMode mode) {
    PropertyDetails details = GetDetails(descriptor);
    details.PrintAsFastTo(os, mode);
    os << " @ ";
    Object* value = GetValue(descriptor);
    switch (details.location()) {
      case kField: {
        FieldType* field_type = Map::UnwrapFieldType(value);
        field_type->PrintTo(os);
        break;
      }
      case kDescriptor:
        os << Brief(value);
        if (value->IsAccessorPair()) {
          AccessorPair* pair = AccessorPair::cast(value);
          os << "(get: " << Brief(pair->getter())
             << ", set: " << Brief(pair->setter()) << ")";
        }
        break;
    }
  }
  
  void TransitionArray::Print() {
    OFStream os(stdout);
    TransitionArray::PrintTransitions(os, this);
    os << "\n" << std::flush;
  }
  
  
  void TransitionArray::PrintTransitions(std::ostream& os, Object* transitions,
                                         bool print_header) {  // NOLINT
    int num_transitions = NumberOfTransitions(transitions);
    if (print_header) {
      os << "Transition array #" << num_transitions << ":";
    }
    for (int i = 0; i < num_transitions; i++) {
      Name* key = GetKey(transitions, i);
      Map* target = GetTarget(transitions, i);
      os << "\n     ";
  #ifdef OBJECT_PRINT
      key->NamePrint(os);
  #else
      key->ShortPrint(os);
  #endif
      os << ": ";
      Heap* heap = key->GetHeap();
      if (key == heap->nonextensible_symbol()) {
        os << "(transition to non-extensible)";
      } else if (key == heap->sealed_symbol()) {
        os << "(transition to sealed)";
      } else if (key == heap->frozen_symbol()) {
        os << "(transition to frozen)";
      } else if (key == heap->elements_transition_symbol()) {
        os << "(transition to " << ElementsKindToString(target->elements_kind())
           << ")";
      } else if (key == heap->strict_function_transition_symbol()) {
        os << " (transition to strict function)";
      } else {
        DCHECK(!IsSpecialTransition(key));
        os << "(transition to ";
        int descriptor = target->LastAdded();
        DescriptorArray* descriptors = target->instance_descriptors();
        descriptors->PrintDescriptorDetails(os, descriptor,
                                            PropertyDetails::kForTransitions);
        os << ")";
      }
      os << " -> " << Brief(target);
    }
  }
  
  
  void JSObject::PrintTransitions(std::ostream& os) {  // NOLINT
    Object* transitions = map()->raw_transitions();
    int num_transitions = TransitionArray::NumberOfTransitions(transitions);
    if (num_transitions == 0) return;
    os << "\n - transitions";
    TransitionArray::PrintTransitions(os, transitions, false);
  }
  #endif  // defined(DEBUG) || defined(OBJECT_PRINT)
  }  // namespace internal
  }  // namespace v8
  
  //
  // The following functions are used by our gdb macros.
  //
  extern void _v8_internal_Print_Object(void* object) {
    reinterpret_cast<i::Object*>(object)->Print();
  }
  
  extern void _v8_internal_Print_Code(void* object) {
    i::Isolate* isolate = i::Isolate::Current();
    isolate->FindCodeObject(reinterpret_cast<i::Address>(object))->Print();
  }
  
  extern void _v8_internal_Print_FeedbackMetadata(void* object) {
    if (reinterpret_cast<i::Object*>(object)->IsSmi()) {
      printf("Not a feedback metadata object\n");
    } else {
      reinterpret_cast<i::FeedbackMetadata*>(object)->Print();
    }
  }
  
  extern void _v8_internal_Print_FeedbackVector(void* object) {
    if (reinterpret_cast<i::Object*>(object)->IsSmi()) {
      printf("Not a feedback vector\n");
    } else {
      reinterpret_cast<i::FeedbackVector*>(object)->Print();
    }
  }
  
  extern void _v8_internal_Print_DescriptorArray(void* object) {
    if (reinterpret_cast<i::Object*>(object)->IsSmi()) {
      printf("Not a descriptor array\n");
    } else {
      reinterpret_cast<i::DescriptorArray*>(object)->Print();
    }
  }
  
  extern void _v8_internal_Print_LayoutDescriptor(void* object) {
    i::Object* o = reinterpret_cast<i::Object*>(object);
    if (!o->IsLayoutDescriptor()) {
      printf("Not a layout descriptor\n");
    } else {
      reinterpret_cast<i::LayoutDescriptor*>(object)->Print();
    }
  }
  
  extern void _v8_internal_Print_TransitionArray(void* object) {
    if (reinterpret_cast<i::Object*>(object)->IsSmi()) {
      printf("Not a transition array\n");
    } else {
      reinterpret_cast<i::TransitionArray*>(object)->Print();
    }
  }
  
  extern void _v8_internal_Print_StackTrace() {
    i::Isolate* isolate = i::Isolate::Current();
    isolate->PrintStack(stdout);
  }
  