objects-printer.cc

// 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 <iomanip>
#include <memory>

#include "src/common/globals.h"
#include "src/debug/debug-wasm-objects-inl.h"
#include "src/diagnostics/disasm.h"
#include "src/diagnostics/disassembler.h"
#include "src/heap/heap-inl.h"                // For InOldSpace.
#include "src/heap/heap-write-barrier-inl.h"  // For GetIsolateFromWritableObj.
#include "src/init/bootstrapper.h"
#include "src/interpreter/bytecodes.h"
#include "src/objects/all-objects-inl.h"
#include "src/objects/code-kind.h"
#include "src/regexp/regexp.h"
#include "src/snapshot/embedded/embedded-data.h"
#include "src/utils/ostreams.h"
#include "src/wasm/wasm-code-manager.h"
#include "src/wasm/wasm-engine.h"
#include "src/wasm/wasm-objects-inl.h"

namespace v8 {
namespace internal {

#ifdef OBJECT_PRINT

void Object::Print() const {
  // Output into debugger's command window if a debugger is attached.
  DbgStdoutStream dbg_os;
  this->Print(dbg_os);
  dbg_os << std::flush;

  StdoutStream os;
  this->Print(os);
  os << std::flush;
}

void Object::Print(std::ostream& os) const {  // NOLINT
  if (IsSmi()) {
    os << "Smi: " << std::hex << "0x" << Smi::ToInt(*this);
    os << std::dec << " (" << Smi::ToInt(*this) << ")\n";
  } else {
    HeapObject::cast(*this).HeapObjectPrint(os);
  }
}

namespace {

void PrintHeapObjectHeaderWithoutMap(HeapObject object, std::ostream& os,
                                     const char* id) {  // NOLINT
  os << reinterpret_cast<void*>(object.ptr()) << ": [";
  if (id != nullptr) {
    os << id;
  } else {
    os << object.map().instance_type();
  }
  os << "]";
  if (ReadOnlyHeap::Contains(object)) {
    os << " in ReadOnlySpace";
  } else if (GetHeapFromWritableObject(object)->InOldSpace(object)) {
    os << " in OldSpace";
  }
}

template <typename T>
void PrintDictionaryContents(std::ostream& os, T dict) {
  DisallowGarbageCollection no_gc;
  ReadOnlyRoots roots = dict.GetReadOnlyRoots();

  for (InternalIndex i : dict.IterateEntries()) {
    Object k;
    if (!dict.ToKey(roots, i, &k)) continue;
    os << "\n   ";
    if (k.IsString()) {
      String::cast(k).PrintUC16(os);
    } else {
      os << Brief(k);
    }
    os << ": " << Brief(dict.ValueAt(i)) << " ";
    dict.DetailsAt(i).PrintAsSlowTo(os, !T::kIsOrderedDictionaryType);
  }
}
}  // namespace

void HeapObject::PrintHeader(std::ostream& os, const char* id) {  // NOLINT
  PrintHeapObjectHeaderWithoutMap(*this, os, id);
  if (!IsMap()) os << "\n - map: " << Brief(map());
}

void HeapObject::HeapObjectPrint(std::ostream& os) {  // NOLINT
  InstanceType instance_type = map().instance_type();

  if (instance_type < FIRST_NONSTRING_TYPE) {
    String::cast(*this).StringPrint(os);
    os << "\n";
    return;
  }

  switch (instance_type) {
    case AWAIT_CONTEXT_TYPE:
    case BLOCK_CONTEXT_TYPE:
    case CATCH_CONTEXT_TYPE:
    case DEBUG_EVALUATE_CONTEXT_TYPE:
    case EVAL_CONTEXT_TYPE:
    case FUNCTION_CONTEXT_TYPE:
    case MODULE_CONTEXT_TYPE:
    case SCRIPT_CONTEXT_TYPE:
    case WITH_CONTEXT_TYPE:
    case SCRIPT_CONTEXT_TABLE_TYPE:
      Context::cast(*this).ContextPrint(os);
      break;
    case NATIVE_CONTEXT_TYPE:
      NativeContext::cast(*this).NativeContextPrint(os);
      break;
    case HASH_TABLE_TYPE:
      ObjectHashTable::cast(*this).ObjectHashTablePrint(os);
      break;
    case ORDERED_HASH_MAP_TYPE:
      OrderedHashMap::cast(*this).OrderedHashMapPrint(os);
      break;
    case ORDERED_HASH_SET_TYPE:
      OrderedHashSet::cast(*this).OrderedHashSetPrint(os);
      break;
    case ORDERED_NAME_DICTIONARY_TYPE:
      OrderedNameDictionary::cast(*this).OrderedNameDictionaryPrint(os);
      break;
    case NAME_DICTIONARY_TYPE:
      NameDictionary::cast(*this).NameDictionaryPrint(os);
      break;
    case GLOBAL_DICTIONARY_TYPE:
      GlobalDictionary::cast(*this).GlobalDictionaryPrint(os);
      break;
    case SIMPLE_NUMBER_DICTIONARY_TYPE:
      FixedArray::cast(*this).FixedArrayPrint(os);
      break;
    case NUMBER_DICTIONARY_TYPE:
      NumberDictionary::cast(*this).NumberDictionaryPrint(os);
      break;
    case EPHEMERON_HASH_TABLE_TYPE:
      EphemeronHashTable::cast(*this).EphemeronHashTablePrint(os);
      break;
    case OBJECT_BOILERPLATE_DESCRIPTION_TYPE:
      ObjectBoilerplateDescription::cast(*this)
          .ObjectBoilerplateDescriptionPrint(os);
      break;
    case TRANSITION_ARRAY_TYPE:
      TransitionArray::cast(*this).TransitionArrayPrint(os);
      break;
    case CLOSURE_FEEDBACK_CELL_ARRAY_TYPE:
      ClosureFeedbackCellArray::cast(*this).ClosureFeedbackCellArrayPrint(os);
      break;

    case FILLER_TYPE:
      os << "filler";
      break;
    case JS_API_OBJECT_TYPE:
    case JS_ARRAY_ITERATOR_PROTOTYPE_TYPE:
    case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
    case JS_ERROR_TYPE:
    case JS_ITERATOR_PROTOTYPE_TYPE:
    case JS_MAP_ITERATOR_PROTOTYPE_TYPE:
    case JS_OBJECT_PROTOTYPE_TYPE:
    case JS_PROMISE_PROTOTYPE_TYPE:
    case JS_REG_EXP_PROTOTYPE_TYPE:
    case JS_SET_ITERATOR_PROTOTYPE_TYPE:
    case JS_SET_PROTOTYPE_TYPE:
    case JS_SPECIAL_API_OBJECT_TYPE:
    case JS_STRING_ITERATOR_PROTOTYPE_TYPE:
    case JS_TYPED_ARRAY_PROTOTYPE_TYPE:
      JSObject::cast(*this).JSObjectPrint(os);
      break;
    case WASM_INSTANCE_OBJECT_TYPE:
      WasmInstanceObject::cast(*this).WasmInstanceObjectPrint(os);
      break;
    case WASM_VALUE_OBJECT_TYPE:
      WasmValueObject::cast(*this).WasmValueObjectPrint(os);
      break;
    case CODE_TYPE:
      Code::cast(*this).CodePrint(os);
      break;
    case CODE_DATA_CONTAINER_TYPE:
      CodeDataContainer::cast(*this).CodeDataContainerPrint(os);
      break;
    case JS_SET_KEY_VALUE_ITERATOR_TYPE:
    case JS_SET_VALUE_ITERATOR_TYPE:
      JSSetIterator::cast(*this).JSSetIteratorPrint(os);
      break;
    case JS_MAP_KEY_ITERATOR_TYPE:
    case JS_MAP_KEY_VALUE_ITERATOR_TYPE:
    case JS_MAP_VALUE_ITERATOR_TYPE:
      JSMapIterator::cast(*this).JSMapIteratorPrint(os);
      break;
#define MAKE_TORQUE_CASE(Name, TYPE)   \
  case TYPE:                           \
    Name::cast(*this).Name##Print(os); \
    break;
      // Every class that has its fields defined in a .tq file and corresponds
      // to exactly one InstanceType value is included in the following list.
      TORQUE_INSTANCE_CHECKERS_SINGLE_FULLY_DEFINED(MAKE_TORQUE_CASE)
      TORQUE_INSTANCE_CHECKERS_MULTIPLE_FULLY_DEFINED(MAKE_TORQUE_CASE)
#undef MAKE_TORQUE_CASE

    case ALLOCATION_SITE_TYPE:
      AllocationSite::cast(*this).AllocationSitePrint(os);
      break;
    case LOAD_HANDLER_TYPE:
      LoadHandler::cast(*this).LoadHandlerPrint(os);
      break;
    case STORE_HANDLER_TYPE:
      StoreHandler::cast(*this).StoreHandlerPrint(os);
      break;
    case FEEDBACK_METADATA_TYPE:
      FeedbackMetadata::cast(*this).FeedbackMetadataPrint(os);
      break;
    case JS_PROMISE_CONSTRUCTOR_TYPE:
    case JS_REG_EXP_CONSTRUCTOR_TYPE:
    case JS_ARRAY_CONSTRUCTOR_TYPE:
#define TYPED_ARRAY_CONSTRUCTORS_SWITCH(Type, type, TYPE, Ctype) \
  case TYPE##_TYPED_ARRAY_CONSTRUCTOR_TYPE:
      TYPED_ARRAYS(TYPED_ARRAY_CONSTRUCTORS_SWITCH)
#undef TYPED_ARRAY_CONSTRUCTORS_SWITCH
      JSFunction::cast(*this).JSFunctionPrint(os);
      break;
    case INTERNALIZED_STRING_TYPE:
    case EXTERNAL_INTERNALIZED_STRING_TYPE:
    case ONE_BYTE_INTERNALIZED_STRING_TYPE:
    case EXTERNAL_ONE_BYTE_INTERNALIZED_STRING_TYPE:
    case UNCACHED_EXTERNAL_INTERNALIZED_STRING_TYPE:
    case UNCACHED_EXTERNAL_ONE_BYTE_INTERNALIZED_STRING_TYPE:
    case STRING_TYPE:
    case CONS_STRING_TYPE:
    case EXTERNAL_STRING_TYPE:
    case SLICED_STRING_TYPE:
    case THIN_STRING_TYPE:
    case ONE_BYTE_STRING_TYPE:
    case CONS_ONE_BYTE_STRING_TYPE:
    case EXTERNAL_ONE_BYTE_STRING_TYPE:
    case SLICED_ONE_BYTE_STRING_TYPE:
    case THIN_ONE_BYTE_STRING_TYPE:
    case UNCACHED_EXTERNAL_STRING_TYPE:
    case UNCACHED_EXTERNAL_ONE_BYTE_STRING_TYPE:
      // TODO(all): Handle these types too.
      os << "UNKNOWN TYPE " << map().instance_type();
      UNREACHABLE();
  }
}

void ByteArray::ByteArrayPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "ByteArray");
  os << "\n - length: " << length()
     << "\n - data-start: " << static_cast<void*>(GetDataStartAddress())
     << "\n";
}

void BytecodeArray::BytecodeArrayPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "BytecodeArray");
  os << "\n";
  Disassemble(os);
}

void FreeSpace::FreeSpacePrint(std::ostream& os) {  // NOLINT
  os << "free space, size " << Size() << "\n";
}

bool JSObject::PrintProperties(std::ostream& os) {  // NOLINT
  if (HasFastProperties()) {
    DescriptorArray descs = map().instance_descriptors(kRelaxedLoad);
    int nof_inobject_properties = map().GetInObjectProperties();
    for (InternalIndex i : map().IterateOwnDescriptors()) {
      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);
          os << Brief(RawFastPropertyAt(field_index));
          break;
        }
        case kDescriptor:
          os << Brief(descs.GetStrongValue(i));
          break;
      }
      os << " ";
      details.PrintAsFastTo(os, PropertyDetails::kForProperties);
      if (details.location() == kField) {
        int field_index = details.field_index();
        if (field_index < nof_inobject_properties) {
          os << ", location: in-object";
        } else {
          field_index -= nof_inobject_properties;
          os << ", location: properties[" << field_index << "]";
        }
      } else {
        os << ", location: descriptor";
      }
    }
    return map().NumberOfOwnDescriptors() > 0;
  } else if (IsJSGlobalObject()) {
    PrintDictionaryContents(
        os, JSGlobalObject::cast(*this).global_dictionary(kAcquireLoad));
  } else if (V8_DICT_MODE_PROTOTYPES_BOOL) {
    PrintDictionaryContents(os, property_dictionary_ordered());
  } else {
    PrintDictionaryContents(os, property_dictionary());
  }
  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, int length) {  // NOLINT
  const bool print_the_hole = std::is_same<T, FixedDoubleArray>::value;
  T array = T::cast(object);
  if (length == 0) return;
  int previous_index = 0;
  double previous_value = GetScalarElement(array, 0);
  double value = 0.0;
  int i;
  for (i = 1; i <= length; i++) {
    if (i < length) value = GetScalarElement(array, i);
    bool values_are_nan = std::isnan(previous_value) && std::isnan(value);
    if (i != 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;
  }
}

template <typename ElementType>
void PrintTypedArrayElements(std::ostream& os, const ElementType* data_ptr,
                             size_t length, bool is_on_heap) {
  if (length == 0) return;
  size_t previous_index = 0;
  if (i::FLAG_mock_arraybuffer_allocator && !is_on_heap) {
    // Don't try to print data that's not actually allocated.
    os << "\n    0-" << length << ": <mocked array buffer bytes>";
    return;
  }

  ElementType previous_value = data_ptr[0];
  ElementType value = 0;
  for (size_t i = 1; i <= length; i++) {
    if (i < length) value = data_ptr[i];
    if (i != length && previous_value == value) {
      continue;
    }
    os << "\n";
    std::stringstream ss;
    ss << previous_index;
    if (previous_index != i - 1) {
      ss << '-' << (i - 1);
    }
    os << std::setw(12) << ss.str() << ": " << +previous_value;
    previous_index = i;
    previous_value = value;
  }
}

template <typename T>
void PrintFixedArrayElements(std::ostream& os, T array) {
  // Print in array notation for non-sparse arrays.
  Object previous_value = array.length() > 0 ? array.get(0) : Object();
  Object value;
  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;
  }
}

void PrintDictionaryElements(std::ostream& os, FixedArrayBase elements) {
  // Print some internal fields
  NumberDictionary dict = NumberDictionary::cast(elements);
  if (dict.requires_slow_elements()) {
    os << "\n   - requires_slow_elements";
  } else {
    os << "\n   - max_number_key: " << dict.max_number_key();
  }
  PrintDictionaryContents(os, dict);
}

void PrintSloppyArgumentElements(std::ostream& os, ElementsKind kind,
                                 SloppyArgumentsElements elements) {
  FixedArray arguments_store = elements.arguments();
  os << "\n    0: context: " << Brief(elements.context())
     << "\n    1: arguments_store: " << Brief(arguments_store)
     << "\n    parameter to context slot map:";
  for (int i = 0; i < elements.length(); i++) {
    Object mapped_entry = elements.mapped_entries(i);
    os << "\n    " << i << ": param(" << i << "): " << Brief(mapped_entry);
    if (mapped_entry.IsTheHole()) {
      os << " in the arguments_store[" << i << "]";
    } else {
      os << " in the context";
    }
  }
  if (arguments_store.length() == 0) return;
  os << "\n }"
     << "\n - arguments_store: " << Brief(arguments_store) << " "
     << ElementsKindToString(arguments_store.map().elements_kind()) << " {";
  if (kind == FAST_SLOPPY_ARGUMENTS_ELEMENTS) {
    PrintFixedArrayElements(os, arguments_store);
  } else {
    DCHECK_EQ(kind, SLOW_SLOPPY_ARGUMENTS_ELEMENTS);
    PrintDictionaryElements(os, arguments_store);
  }
}

void PrintEmbedderData(IsolateRoot isolate, std::ostream& os,
                       EmbedderDataSlot slot) {
  DisallowGarbageCollection no_gc;
  Object value = slot.load_tagged();
  os << Brief(value);
  void* raw_pointer;
  if (slot.ToAlignedPointer(isolate, &raw_pointer)) {
    os << ", aligned pointer: " << raw_pointer;
  }
}

}  // namespace

void JSObject::PrintElements(std::ostream& os) {  // NOLINT
  // Don't call GetElementsKind, its validation code can cause the printer to
  // fail when debugging.
  os << " - elements: " << Brief(elements()) << " {";
  switch (map().elements_kind()) {
    case HOLEY_SMI_ELEMENTS:
    case PACKED_SMI_ELEMENTS:
    case HOLEY_ELEMENTS:
    case HOLEY_FROZEN_ELEMENTS:
    case HOLEY_SEALED_ELEMENTS:
    case HOLEY_NONEXTENSIBLE_ELEMENTS:
    case PACKED_ELEMENTS:
    case PACKED_FROZEN_ELEMENTS:
    case PACKED_SEALED_ELEMENTS:
    case PACKED_NONEXTENSIBLE_ELEMENTS:
    case FAST_STRING_WRAPPER_ELEMENTS: {
      PrintFixedArrayElements(os, FixedArray::cast(elements()));
      break;
    }
    case HOLEY_DOUBLE_ELEMENTS:
    case PACKED_DOUBLE_ELEMENTS: {
      DoPrintElements<FixedDoubleArray>(os, elements(), elements().length());
      break;
    }

#define PRINT_ELEMENTS(Type, type, TYPE, elementType)                         \
  case TYPE##_ELEMENTS: {                                                     \
    size_t length = JSTypedArray::cast(*this).length();                       \
    bool is_on_heap = JSTypedArray::cast(*this).is_on_heap();                 \
    const elementType* data_ptr =                                             \
        static_cast<const elementType*>(JSTypedArray::cast(*this).DataPtr()); \
    PrintTypedArrayElements<elementType>(os, data_ptr, length, is_on_heap);   \
    break;                                                                    \
  }
      TYPED_ARRAYS(PRINT_ELEMENTS)
#undef PRINT_ELEMENTS

    case DICTIONARY_ELEMENTS:
    case SLOW_STRING_WRAPPER_ELEMENTS:
      PrintDictionaryElements(os, elements());
      break;
    case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
    case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
      PrintSloppyArgumentElements(os, map().elements_kind(),
                                  SloppyArgumentsElements::cast(elements()));
      break;
    case NO_ELEMENTS:
      break;
  }
  os << "\n }\n";
}

static void JSObjectPrintHeader(std::ostream& os, JSObject obj,
                                const char* id) {  // NOLINT
  Isolate* isolate = obj.GetIsolate();
  obj.PrintHeader(os, id);
  // Don't call GetElementsKind, its validation code can cause the printer to
  // fail when debugging.
  os << " [";
  if (obj.HasFastProperties()) {
    os << "FastProperties";
  } else {
    os << "DictionaryProperties";
  }
  PrototypeIterator iter(isolate, obj);
  os << "]\n - prototype: " << Brief(iter.GetCurrent());
  os << "\n - elements: " << Brief(obj.elements()) << " ["
     << ElementsKindToString(obj.map().elements_kind());
  if (obj.elements().IsCowArray()) os << " (COW)";
  os << "]";
  Object hash = obj.GetHash();
  if (hash.IsSmi()) {
    os << "\n - hash: " << Brief(hash);
  }
  if (obj.GetEmbedderFieldCount() > 0) {
    os << "\n - embedder fields: " << obj.GetEmbedderFieldCount();
  }
}

static void JSObjectPrintBody(std::ostream& os,
                              JSObject obj,  // NOLINT
                              bool print_elements = true) {
  os << "\n - properties: ";
  Object properties_or_hash = obj.raw_properties_or_hash();
  if (!properties_or_hash.IsSmi()) {
    os << Brief(properties_or_hash);
  }
  os << "\n - All own properties (excluding elements): {";
  if (obj.PrintProperties(os)) os << "\n ";
  os << "}\n";

  if (print_elements) {
    size_t length = obj.IsJSTypedArray() ? JSTypedArray::cast(obj).length()
                                         : obj.elements().length();
    if (length > 0) obj.PrintElements(os);
  }
  int embedder_fields = obj.GetEmbedderFieldCount();
  if (embedder_fields > 0) {
    IsolateRoot isolate = GetIsolateForPtrCompr(obj);
    os << " - embedder fields = {";
    for (int i = 0; i < embedder_fields; i++) {
      os << "\n    ";
      PrintEmbedderData(isolate, os, EmbedderDataSlot(obj, i));
    }
    os << "\n }\n";
  }
}

void JSObject::JSObjectPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, nullptr);
  JSObjectPrintBody(os, *this);
}

void JSGeneratorObject::JSGeneratorObjectPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSGeneratorObject");
  os << "\n - function: " << Brief(function());
  os << "\n - context: " << Brief(context());
  os << "\n - receiver: " << Brief(receiver());
  if (is_executing() || is_closed()) {
    os << "\n - input: " << Brief(input_or_debug_pos());
  } else {
    DCHECK(is_suspended());
    os << "\n - debug pos: " << Brief(input_or_debug_pos());
  }
  const char* mode = "(invalid)";
  switch (resume_mode()) {
    case kNext:
      mode = ".next()";
      break;
    case kReturn:
      mode = ".return()";
      break;
    case kThrow:
      mode = ".throw()";
      break;
  }
  os << "\n - resume mode: " << mode;
  os << "\n - continuation: " << continuation();
  if (is_closed()) os << " (closed)";
  if (is_executing()) os << " (executing)";
  if (is_suspended()) os << " (suspended)";
  if (is_suspended()) {
    DisallowGarbageCollection no_gc;
    SharedFunctionInfo fun_info = function().shared();
    if (fun_info.HasSourceCode()) {
      Script script = Script::cast(fun_info.script());
      String script_name = script.name().IsString()
                               ? String::cast(script.name())
                               : GetReadOnlyRoots().empty_string();

      os << "\n - source position: ";
      // Can't collect source positions here if not available as that would
      // allocate memory.
      Isolate* isolate = GetIsolate();
      if (fun_info.HasBytecodeArray() &&
          fun_info.GetBytecodeArray(isolate).HasSourcePositionTable()) {
        os << source_position();
        os << " (";
        script_name.PrintUC16(os);
        int lin = script.GetLineNumber(source_position()) + 1;
        int col = script.GetColumnNumber(source_position()) + 1;
        os << ", lin " << lin;
        os << ", col " << col;
      } else {
        os << "unavailable";
      }
      os << ")";
    }
  }
  os << "\n - register file: " << Brief(parameters_and_registers());
  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());
  if (status() == Promise::kPending) {
    os << "\n - reactions: " << Brief(reactions());
  } else {
    os << "\n - result: " << Brief(result());
  }
  os << "\n - has_handler: " << has_handler();
  os << "\n - handled_hint: " << handled_hint();
  JSObjectPrintBody(os, *this);
}

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 JSRegExpStringIterator::JSRegExpStringIteratorPrint(
    std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSRegExpStringIterator");
  os << "\n - regex: " << Brief(iterating_reg_exp());
  os << "\n - string: " << Brief(iterated_string());
  os << "\n - done: " << done();
  os << "\n - global: " << global();
  os << "\n - unicode: " << unicode();
  JSObjectPrintBody(os, *this);
}

void Symbol::SymbolPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "Symbol");
  os << "\n - hash: " << hash();
  os << "\n - description: " << Brief(description());
  if (description().IsUndefined()) {
    os << " (" << PrivateSymbolToName() << ")";
  }
  os << "\n - private: " << is_private();
}

void DescriptorArray::DescriptorArrayPrint(std::ostream& os) {
  PrintHeader(os, "DescriptorArray");
  os << "\n - enum_cache: ";
  if (enum_cache().keys().length() == 0) {
    os << "empty";
  } else {
    os << enum_cache().keys().length();
    os << "\n   - keys: " << Brief(enum_cache().keys());
    os << "\n   - indices: " << Brief(enum_cache().indices());
  }
  os << "\n - nof slack descriptors: " << number_of_slack_descriptors();
  os << "\n - nof descriptors: " << number_of_descriptors();
  int16_t raw_marked = raw_number_of_marked_descriptors();
  os << "\n - raw marked descriptors: mc epoch "
     << NumberOfMarkedDescriptors::Epoch::decode(raw_marked) << ", marked "
     << NumberOfMarkedDescriptors::Marked::decode(raw_marked);
  PrintDescriptors(os);
}

namespace {
void PrintFixedArrayWithHeader(std::ostream& os, FixedArray array,
                               const char* type) {
  array.PrintHeader(os, type);
  os << "\n - length: " << array.length();
  PrintFixedArrayElements(os, array);
  os << "\n";
}

template <typename T>
void PrintWeakArrayElements(std::ostream& os, T* array) {
  // Print in array notation for non-sparse arrays.
  MaybeObject previous_value =
      array->length() > 0 ? array->Get(0) : MaybeObject(kNullAddress);
  MaybeObject value;
  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

void ObjectBoilerplateDescription::ObjectBoilerplateDescriptionPrint(
    std::ostream& os) {
  PrintFixedArrayWithHeader(os, *this, "ObjectBoilerplateDescription");
}

void EmbedderDataArray::EmbedderDataArrayPrint(std::ostream& os) {
  IsolateRoot isolate = GetIsolateForPtrCompr(*this);
  PrintHeader(os, "EmbedderDataArray");
  os << "\n - length: " << length();
  EmbedderDataSlot start(*this, 0);
  EmbedderDataSlot end(*this, length());
  for (EmbedderDataSlot slot = start; slot < end; ++slot) {
    os << "\n    ";
    PrintEmbedderData(isolate, os, slot);
  }
  os << "\n";
}

void FixedArray::FixedArrayPrint(std::ostream& os) {
  PrintFixedArrayWithHeader(os, *this, "FixedArray");
}

namespace {
void PrintContextWithHeader(std::ostream& os, Context context,
                            const char* type) {
  context.PrintHeader(os, type);
  os << "\n - length: " << context.length();
  os << "\n - scope_info: " << Brief(context.scope_info());
  os << "\n - previous: " << Brief(context.unchecked_previous());
  os << "\n - native_context: " << Brief(context.native_context());
  PrintFixedArrayElements(os, context);
  os << "\n";
}
}  // namespace

void Context::ContextPrint(std::ostream& os) {
  PrintContextWithHeader(os, *this, "Context");
}

void NativeContext::NativeContextPrint(std::ostream& os) {
  PrintContextWithHeader(os, *this, "NativeContext");
  os << " - microtask_queue: " << microtask_queue() << "\n";
}

namespace {
using DataPrinter = std::function<void(InternalIndex)>;

// Prints the data associated with each key (but no headers or other meta
// data) in a hash table. Works on different hash table types, like the
// subtypes of HashTable and OrderedHashTable. |print_data_at| is given an
// index into the table (where a valid key resides) and prints the data at
// that index, like just the value (in case of a hash map), or value and
// property details (in case of a property dictionary). No leading space
// required or trailing newline required. It can be null/non-callable
// std::function to indicate that there is no associcated data to be printed
// (for example in case of a hash set).
template <typename T>
void PrintTableContentsGeneric(std::ostream& os, T dict,
                               DataPrinter print_data_at) {
  DisallowGarbageCollection no_gc;
  ReadOnlyRoots roots = dict.GetReadOnlyRoots();

  for (InternalIndex i : dict.IterateEntries()) {
    Object k;
    if (!dict.ToKey(roots, i, &k)) continue;
    os << "\n   " << std::setw(12) << i.as_int() << ": ";
    if (k.IsString()) {
      String::cast(k).PrintUC16(os);
    } else {
      os << Brief(k);
    }
    if (print_data_at) {
      os << " -> ";
      print_data_at(i);
    }
  }
}

// Used for ordered and unordered dictionaries.
template <typename T>
void PrintDictionaryContentsFull(std::ostream& os, T dict) {
  os << "\n - elements: {";
  auto print_value_and_property_details = [&](InternalIndex i) {
    os << Brief(dict.ValueAt(i)) << " ";
    dict.DetailsAt(i).PrintAsSlowTo(os, !T::kIsOrderedDictionaryType);
  };
  PrintTableContentsGeneric(os, dict, print_value_and_property_details);
  os << "\n }\n";
}

// Used for ordered and unordered hash maps.
template <typename T>
void PrintHashMapContentsFull(std::ostream& os, T dict) {
  os << "\n - elements: {";
  auto print_value = [&](InternalIndex i) { os << Brief(dict.ValueAt(i)); };
  PrintTableContentsGeneric(os, dict, print_value);
  os << "\n }\n";
}

// Used for ordered and unordered hash sets.
template <typename T>
void PrintHashSetContentsFull(std::ostream& os, T dict) {
  os << "\n - elements: {";
  // Passing non-callable std::function as there are no values to print.
  PrintTableContentsGeneric(os, dict, nullptr);
  os << "\n }\n";
}

// Used for subtypes of OrderedHashTable.
template <typename T>
void PrintOrderedHashTableHeaderAndBuckets(std::ostream& os, T table,
                                           const char* type) {
  DisallowGarbageCollection no_gc;

  PrintHeapObjectHeaderWithoutMap(table, os, type);
  os << "\n - FixedArray length: " << table.length();
  os << "\n - elements: " << table.NumberOfElements();
  os << "\n - deleted: " << table.NumberOfDeletedElements();
  os << "\n - buckets: " << table.NumberOfBuckets();
  os << "\n - capacity: " << table.Capacity();

  os << "\n - buckets: {";
  for (int bucket = 0; bucket < table.NumberOfBuckets(); bucket++) {
    Object entry = table.get(T::HashTableStartIndex() + bucket);
    DCHECK(entry.IsSmi());
    os << "\n   " << std::setw(12) << bucket << ": " << Brief(entry);
  }
  os << "\n }";
}

// Used for subtypes of HashTable.
template <typename T>
void PrintHashTableHeader(std::ostream& os, T table, const char* type) {
  PrintHeapObjectHeaderWithoutMap(table, os, type);
  os << "\n - FixedArray length: " << table.length();
  os << "\n - elements: " << table.NumberOfElements();
  os << "\n - deleted: " << table.NumberOfDeletedElements();
  os << "\n - capacity: " << table.Capacity();
}
}  // namespace

void ObjectHashTable::ObjectHashTablePrint(std::ostream& os) {
  PrintHashTableHeader(os, *this, "ObjectHashTable");
  PrintHashMapContentsFull(os, *this);
}

void NumberDictionary::NumberDictionaryPrint(std::ostream& os) {
  PrintHashTableHeader(os, *this, "NumberDictionary");
  PrintDictionaryContentsFull(os, *this);
}

void EphemeronHashTable::EphemeronHashTablePrint(std::ostream& os) {
  PrintHashTableHeader(os, *this, "EphemeronHashTable");
  PrintHashMapContentsFull(os, *this);
}

void NameDictionary::NameDictionaryPrint(std::ostream& os) {
  PrintHashTableHeader(os, *this, "NameDictionary");
  PrintDictionaryContentsFull(os, *this);
}

void GlobalDictionary::GlobalDictionaryPrint(std::ostream& os) {
  PrintHashTableHeader(os, *this, "GlobalDictionary");
  PrintDictionaryContentsFull(os, *this);
}

void SmallOrderedHashSet::SmallOrderedHashSetPrint(std::ostream& os) {
  PrintHeader(os, "SmallOrderedHashSet");
  // TODO(turbofan): Print all fields.
}

void SmallOrderedHashMap::SmallOrderedHashMapPrint(std::ostream& os) {
  PrintHeader(os, "SmallOrderedHashMap");
  // TODO(turbofan): Print all fields.
}

void SmallOrderedNameDictionary::SmallOrderedNameDictionaryPrint(
    std::ostream& os) {
  PrintHeader(os, "SmallOrderedNameDictionary");
  // TODO(turbofan): Print all fields.
}

void OrderedHashSet::OrderedHashSetPrint(std::ostream& os) {
  PrintOrderedHashTableHeaderAndBuckets(os, *this, "OrderedHashSet");
  PrintHashSetContentsFull(os, *this);
}

void OrderedHashMap::OrderedHashMapPrint(std::ostream& os) {
  PrintOrderedHashTableHeaderAndBuckets(os, *this, "OrderedHashMap");
  PrintHashMapContentsFull(os, *this);
}

void OrderedNameDictionary::OrderedNameDictionaryPrint(std::ostream& os) {
  PrintOrderedHashTableHeaderAndBuckets(os, *this, "OrderedNameDictionary");
  PrintDictionaryContentsFull(os, *this);
}

void print_hex_byte(std::ostream& os, int value) {
  os << "0x" << std::setfill('0') << std::setw(2) << std::right << std::hex
     << (value & 0xff) << std::setfill(' ');
}

void SwissNameDictionary::SwissNameDictionaryPrint(std::ostream& os) {
  this->PrintHeader(os, "SwissNameDictionary");
  os << "\n - meta table ByteArray: "
     << reinterpret_cast<void*>(this->meta_table().ptr());
  os << "\n - capacity: " << this->Capacity();
  os << "\n - elements: " << this->NumberOfElements();
  os << "\n - deleted: " << this->NumberOfDeletedElements();

  std::ios_base::fmtflags sav_flags = os.flags();
  os << "\n - ctrl table (omitting buckets where key is hole value): {";
  for (int i = 0; i < this->Capacity() + kGroupWidth; i++) {
    ctrl_t ctrl = CtrlTable()[i];

    if (ctrl == Ctrl::kEmpty) continue;

    os << "\n   " << std::setw(12) << std::dec << i << ": ";
    switch (ctrl) {
      case Ctrl::kEmpty:
        UNREACHABLE();
        break;
      case Ctrl::kDeleted:
        print_hex_byte(os, ctrl);
        os << " (= kDeleted)";
        break;
      case Ctrl::kSentinel:
        print_hex_byte(os, ctrl);
        os << " (= kSentinel)";
        break;
      default:
        print_hex_byte(os, ctrl);
        os << " (= H2 of a key)";
        break;
    }
  }
  os << "\n }";

  os << "\n - enumeration table: {";
  for (int enum_index = 0; enum_index < this->UsedCapacity(); enum_index++) {
    int entry = EntryForEnumerationIndex(enum_index);
    os << "\n   " << std::setw(12) << std::dec << enum_index << ": " << entry;
  }
  os << "\n }";

  os << "\n - data table (omitting slots where key is the hole): {";
  for (int bucket = 0; bucket < this->Capacity(); ++bucket) {
    Object k;
    if (!this->ToKey(this->GetReadOnlyRoots(), bucket, &k)) continue;

    Object value = this->ValueAtRaw(bucket);
    PropertyDetails details = this->DetailsAt(bucket);
    os << "\n   " << std::setw(12) << std::dec << bucket << ": ";
    if (k.IsString()) {
      String::cast(k).PrintUC16(os);
    } else {
      os << Brief(k);
    }
    os << " -> " << Brief(value);
    details.PrintAsSlowTo(os, false);
  }
  os << "\n }\n";
  os.flags(sav_flags);
}

void PropertyArray::PropertyArrayPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "PropertyArray");
  os << "\n - length: " << length();
  os << "\n - hash: " << Hash();
  PrintFixedArrayElements(os, *this);
  os << "\n";
}

void FixedDoubleArray::FixedDoubleArrayPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "FixedDoubleArray");
  os << "\n - length: " << length();
  DoPrintElements<FixedDoubleArray>(os, *this, length());
  os << "\n";
}

void WeakFixedArray::WeakFixedArrayPrint(std::ostream& os) {
  PrintHeader(os, "WeakFixedArray");
  os << "\n - length: " << length() << "\n";
  PrintWeakArrayElements(os, this);
  os << "\n";
}

void WeakArrayList::WeakArrayListPrint(std::ostream& os) {
  PrintHeader(os, "WeakArrayList");
  os << "\n - capacity: " << capacity();
  os << "\n - length: " << length() << "\n";
  PrintWeakArrayElements(os, this);
  os << "\n";
}

void TransitionArray::TransitionArrayPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "TransitionArray");
  PrintInternal(os);
}

void FeedbackCell::FeedbackCellPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "FeedbackCell");
  ReadOnlyRoots roots = GetReadOnlyRoots();
  if (map() == roots.no_closures_cell_map()) {
    os << "\n - no closures";
  } else if (map() == roots.one_closure_cell_map()) {
    os << "\n - one closure";
  } else if (map() == roots.many_closures_cell_map()) {
    os << "\n - many closures";
  } else {
    os << "\n - Invalid FeedbackCell map";
  }
  os << "\n - value: " << Brief(value());
  os << "\n - interrupt_budget: " << interrupt_budget();
  os << "\n";
}

void FeedbackVectorSpec::Print() {
  StdoutStream os;

  FeedbackVectorSpecPrint(os);

  os << std::flush;
}

void FeedbackVectorSpec::FeedbackVectorSpecPrint(std::ostream& os) {  // NOLINT
  os << " - slot_count: " << slot_count();
  if (slot_count() == 0) {
    os << " (empty)\n";
    return;
  }

  for (int slot = 0; slot < slot_count();) {
    FeedbackSlotKind kind = 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::FeedbackMetadataPrint(std::ostream& os) {
  PrintHeader(os, "FeedbackMetadata");
  os << "\n - slot_count: " << slot_count();
  os << "\n - create_closure_slot_count: " << create_closure_slot_count();

  FeedbackMetadataIterator iter(*this);
  while (iter.HasNext()) {
    FeedbackSlot slot = iter.Next();
    FeedbackSlotKind kind = iter.kind();
    os << "\n Slot " << slot << " " << kind;
  }
  os << "\n";
}

void ClosureFeedbackCellArray::ClosureFeedbackCellArrayPrint(std::ostream& os) {
  PrintFixedArrayWithHeader(os, *this, "ClosureFeedbackCellArray");
}

void FeedbackVector::FeedbackVectorPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "FeedbackVector");
  os << "\n - length: " << length();
  if (length() == 0) {
    os << " (empty)\n";
    return;
  }

  os << "\n - shared function info: " << Brief(shared_function_info());
  if (has_optimized_code()) {
    os << "\n - optimized code: " << Brief(optimized_code());
  } else {
    os << "\n - no optimized code";
  }
  os << "\n - optimization marker: " << optimization_marker();
  os << "\n - optimization tier: " << optimization_tier();
  os << "\n - invocation count: " << invocation_count();
  os << "\n - profiler ticks: " << profiler_ticks();
  os << "\n - closure feedback cell array: ";
  closure_feedback_cell_array().ClosureFeedbackCellArrayPrint(os);

  FeedbackMetadataIterator iter(metadata());
  while (iter.HasNext()) {
    FeedbackSlot slot = iter.Next();
    FeedbackSlotKind kind = iter.kind();

    os << "\n - slot " << slot << " " << kind << " ";
    FeedbackSlotPrint(os, slot);

    int entry_size = iter.entry_size();
    if (entry_size > 0) os << " {";
    for (int i = 0; i < entry_size; i++) {
      FeedbackSlot slot_with_offset = slot.WithOffset(i);
      os << "\n     [" << slot_with_offset.ToInt()
         << "]: " << Brief(Get(slot_with_offset));
    }
    if (entry_size > 0) os << "\n  }";
  }
  os << "\n";
}

void FeedbackVector::FeedbackSlotPrint(std::ostream& os,
                                       FeedbackSlot slot) {  // NOLINT
  FeedbackNexus nexus(*this, slot);
  nexus.Print(os);
}

void FeedbackNexus::Print(std::ostream& os) {  // NOLINT
  switch (kind()) {
    case FeedbackSlotKind::kCall:
    case FeedbackSlotKind::kCloneObject:
    case FeedbackSlotKind::kHasKeyed:
    case FeedbackSlotKind::kInstanceOf:
    case FeedbackSlotKind::kLoadGlobalInsideTypeof:
    case FeedbackSlotKind::kLoadGlobalNotInsideTypeof:
    case FeedbackSlotKind::kLoadKeyed:
    case FeedbackSlotKind::kLoadProperty:
    case FeedbackSlotKind::kStoreDataPropertyInLiteral:
    case FeedbackSlotKind::kStoreGlobalSloppy:
    case FeedbackSlotKind::kStoreGlobalStrict:
    case FeedbackSlotKind::kStoreInArrayLiteral:
    case FeedbackSlotKind::kStoreKeyedSloppy:
    case FeedbackSlotKind::kStoreKeyedStrict:
    case FeedbackSlotKind::kStoreNamedSloppy:
    case FeedbackSlotKind::kStoreNamedStrict:
    case FeedbackSlotKind::kStoreOwnNamed: {
      os << InlineCacheState2String(ic_state());
      break;
    }
    case FeedbackSlotKind::kBinaryOp: {
      os << "BinaryOp:" << GetBinaryOperationFeedback();
      break;
    }
    case FeedbackSlotKind::kCompareOp: {
      os << "CompareOp:" << GetCompareOperationFeedback();
      break;
    }
    case FeedbackSlotKind::kForIn: {
      os << "ForIn:" << GetForInFeedback();
      break;
    }
    case FeedbackSlotKind::kLiteral:
    case FeedbackSlotKind::kTypeProfile:
      break;
    case FeedbackSlotKind::kInvalid:
    case FeedbackSlotKind::kKindsNumber:
      UNREACHABLE();
  }
}

void Oddball::OddballPrint(std::ostream& os) {  // NOLINT
  PrintHeapObjectHeaderWithoutMap(*this, os, "Oddball");
  os << ": ";
  String s = to_string();
  os << s.PrefixForDebugPrint();
  s.PrintUC16(os);
  os << s.SuffixForDebugPrint();
  os << std::endl;
}

void JSAsyncFunctionObject::JSAsyncFunctionObjectPrint(
    std::ostream& os) {  // NOLINT
  JSGeneratorObjectPrint(os);
}

void JSAsyncGeneratorObject::JSAsyncGeneratorObjectPrint(
    std::ostream& os) {  // NOLINT
  JSGeneratorObjectPrint(os);
}

void JSArgumentsObject::JSArgumentsObjectPrint(std::ostream& os) {  // NOLINT
  JSObjectPrint(os);
}

void JSStringIterator::JSStringIteratorPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSStringIterator");
  os << "\n - string: " << Brief(string());
  os << "\n - index: " << index();
  JSObjectPrintBody(os, *this);
}

void JSAsyncFromSyncIterator::JSAsyncFromSyncIteratorPrint(
    std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSAsyncFromSyncIterator");
  os << "\n - sync_iterator: " << Brief(sync_iterator());
  os << "\n - next: " << Brief(next());
  JSObjectPrintBody(os, *this);
}

void JSPrimitiveWrapper::JSPrimitiveWrapperPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSPrimitiveWrapper");
  os << "\n - value: " << Brief(value());
  JSObjectPrintBody(os, *this);
}

void JSMessageObject::JSMessageObjectPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSMessageObject");
  os << "\n - type: " << static_cast<int>(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
  PrintHeapObjectHeaderWithoutMap(*this, os, "String");
  os << ": ";
  os << PrefixForDebugPrint();
  PrintUC16(os, 0, length());
  os << SuffixForDebugPrint();
}

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::ToInt(weekday()) + 1 : 0],
             year().IsSmi() ? Smi::ToInt(year()) : -1,
             month().IsSmi() ? Smi::ToInt(month()) : -1,
             day().IsSmi() ? Smi::ToInt(day()) : -1,
             hour().IsSmi() ? Smi::ToInt(hour()) : -1,
             min().IsSmi() ? Smi::ToInt(min()) : -1,
             sec().IsSmi() ? Smi::ToInt(sec()) : -1);
    os << buf.begin();
  }
  JSObjectPrintBody(os, *this);
}

void JSProxy::JSProxyPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "JSProxy");
  os << "\n - target: ";
  target().ShortPrint(os);
  os << "\n - handler: ";
  handler().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);
}

void JSCollectionIterator::JSCollectionIteratorPrint(
    std::ostream& os, const char* name) {  // NOLINT
  JSObjectPrintHeader(os, *this, name);
  os << "\n - table: " << Brief(table());
  os << "\n - index: " << Brief(index());
  JSObjectPrintBody(os, *this);
}

void JSSetIterator::JSSetIteratorPrint(std::ostream& os) {  // NOLINT
  JSCollectionIteratorPrint(os, "JSSetIterator");
}

void JSMapIterator::JSMapIteratorPrint(std::ostream& os) {  // NOLINT
  JSCollectionIteratorPrint(os, "JSMapIterator");
}

void WeakCell::WeakCellPrint(std::ostream& os) {
  PrintHeader(os, "WeakCell");
  os << "\n - finalization_registry: " << Brief(finalization_registry());
  os << "\n - target: " << Brief(target());
  os << "\n - holdings: " << Brief(holdings());
  os << "\n - prev: " << Brief(prev());
  os << "\n - next: " << Brief(next());
  os << "\n - unregister_token: " << Brief(unregister_token());
  os << "\n - key_list_prev: " << Brief(key_list_prev());
  os << "\n - key_list_next: " << Brief(key_list_next());
}

void JSWeakRef::JSWeakRefPrint(std::ostream& os) {
  JSObjectPrintHeader(os, *this, "JSWeakRef");
  os << "\n - target: " << Brief(target());
  JSObjectPrintBody(os, *this);
}

void JSFinalizationRegistry::JSFinalizationRegistryPrint(std::ostream& os) {
  JSObjectPrintHeader(os, *this, "JSFinalizationRegistry");
  os << "\n - native_context: " << Brief(native_context());
  os << "\n - cleanup: " << Brief(cleanup());
  os << "\n - active_cells: " << Brief(active_cells());
  Object active_cell = active_cells();
  while (active_cell.IsWeakCell()) {
    os << "\n   - " << Brief(active_cell);
    active_cell = WeakCell::cast(active_cell).next();
  }
  os << "\n - cleared_cells: " << Brief(cleared_cells());
  Object cleared_cell = cleared_cells();
  while (cleared_cell.IsWeakCell()) {
    os << "\n   - " << Brief(cleared_cell);
    cleared_cell = WeakCell::cast(cleared_cell).next();
  }
  os << "\n - key_map: " << Brief(key_map());
  JSObjectPrintBody(os, *this);
}

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: " << byte_length();
  if (is_external()) os << "\n - external";
  if (is_detachable()) os << "\n - detachable";
  if (was_detached()) os << "\n - detached";
  if (is_shared()) os << "\n - shared";
  JSObjectPrintBody(os, *this, !was_detached());
}

void JSTypedArray::JSTypedArrayPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSTypedArray");
  os << "\n - buffer: " << Brief(buffer());
  os << "\n - byte_offset: " << byte_offset();
  os << "\n - byte_length: " << byte_length();
  os << "\n - length: " << length();
  os << "\n - data_ptr: " << DataPtr();
  Tagged_t base_ptr = static_cast<Tagged_t>(base_pointer().ptr());
  os << "\n   - base_pointer: "
     << reinterpret_cast<void*>(static_cast<Address>(base_ptr));
  os << "\n   - external_pointer: "
     << reinterpret_cast<void*>(external_pointer());
  if (!buffer().IsJSArrayBuffer()) {
    os << "\n <invalid buffer>\n";
    return;
  }
  if (WasDetached()) os << "\n - detached";
  JSObjectPrintBody(os, *this, !WasDetached());
}

void JSArrayIterator::JSArrayIteratorPrint(std::ostream& os) {  // NOLING
  JSObjectPrintHeader(os, *this, "JSArrayIterator");
  os << "\n - iterated_object: " << Brief(iterated_object());
  os << "\n - next_index: " << Brief(next_index());
  os << "\n - kind: " << kind();
  JSObjectPrintBody(os, *this);
}

void JSDataView::JSDataViewPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSDataView");
  os << "\n - buffer =" << Brief(buffer());
  os << "\n - byte_offset: " << byte_offset();
  os << "\n - byte_length: " << byte_length();
  if (!buffer().IsJSArrayBuffer()) {
    os << "\n <invalid buffer>";
    return;
  }
  if (WasDetached()) os << "\n - detached";
  JSObjectPrintBody(os, *this, !WasDetached());
}

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
  Isolate* isolate = GetIsolate();
  JSObjectPrintHeader(os, *this, "Function");
  os << "\n - function prototype: ";
  if (has_prototype_slot()) {
    if (has_prototype()) {
      os << Brief(prototype());
      if (map().has_non_instance_prototype()) {
        os << " (non-instance prototype)";
      }
    }
    os << "\n - initial_map: ";
    if (has_initial_map()) os << Brief(initial_map());
  } else {
    os << "<no-prototype-slot>";
  }
  os << "\n - shared_info: " << Brief(shared());
  os << "\n - name: " << Brief(shared().Name());

  // Print Builtin name for builtin functions
  int builtin_index = code().builtin_index();
  if (Builtins::IsBuiltinId(builtin_index)) {
    os << "\n - builtin: " << isolate->builtins()->name(builtin_index);
  }

  os << "\n - formal_parameter_count: "
     << shared().internal_formal_parameter_count();
  os << "\n - kind: " << shared().kind();
  os << "\n - context: " << Brief(context());
  os << "\n - code: " << Brief(code());
  if (code().kind() == CodeKind::FOR_TESTING) {
    os << "\n - FOR_TESTING";
  } else if (ActiveTierIsIgnition()) {
    os << "\n - interpreted";
    if (shared().HasBytecodeArray()) {
      os << "\n - bytecode: " << shared().GetBytecodeArray(isolate);
    }
  }
  if (WasmExportedFunction::IsWasmExportedFunction(*this)) {
    WasmExportedFunction function = WasmExportedFunction::cast(*this);
    os << "\n - Wasm instance: " << Brief(function.instance());
    os << "\n - Wasm function index: " << function.function_index();
  }
  if (WasmJSFunction::IsWasmJSFunction(*this)) {
    WasmJSFunction function = WasmJSFunction::cast(*this);
    os << "\n - Wasm wrapper around: " << Brief(function.GetCallable());
  }
  shared().PrintSourceCode(os);
  JSObjectPrintBody(os, *this);
  os << " - feedback vector: ";
  if (!shared().HasFeedbackMetadata()) {
    os << "feedback metadata is not available in SFI\n";
  } else if (has_feedback_vector()) {
    feedback_vector().FeedbackVectorPrint(os);
  } else if (has_closure_feedback_cell_array()) {
    os << "No feedback vector, but we have a closure feedback cell array\n";
    closure_feedback_cell_array().ClosureFeedbackCellArrayPrint(os);
  } else {
    os << "not available\n";
  }
}

void SharedFunctionInfo::PrintSourceCode(std::ostream& os) {
  if (HasSourceCode()) {
    os << "\n - source code: ";
    String source = String::cast(Script::cast(script()).source());
    int start = StartPosition();
    int length = EndPosition() - start;
    std::unique_ptr<char[]> source_string = source.ToCString(
        DISALLOW_NULLS, FAST_STRING_TRAVERSAL, start, length, nullptr);
    os << source_string.get();
  }
}

void SharedFunctionInfo::SharedFunctionInfoPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "SharedFunctionInfo");
  os << "\n - name: ";
  if (HasSharedName()) {
    os << Brief(Name());
  } else {
    os << "<no-shared-name>";
  }
  if (HasInferredName()) {
    os << "\n - inferred name: " << Brief(inferred_name());
  }
  if (class_scope_has_private_brand()) {
    os << "\n - class_scope_has_private_brand";
  }
  if (has_static_private_methods_or_accessors()) {
    os << "\n - has_static_private_methods_or_accessors";
  }
  os << "\n - kind: " << kind();
  os << "\n - syntax kind: " << syntax_kind();
  os << "\n - function_map_index: " << function_map_index();
  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 - data: " << Brief(function_data(kAcquireLoad));
  os << "\n - code (from data): ";
  os << Brief(GetCode());
  PrintSourceCode(os);
  // Script files are often large, thus only print their {Brief} representation.
  os << "\n - script: " << Brief(script());
  os << "\n - function token position: " << function_token_position();
  os << "\n - start position: " << StartPosition();
  os << "\n - end position: " << EndPosition();
  if (HasDebugInfo()) {
    os << "\n - debug info: " << Brief(GetDebugInfo());
  } else {
    os << "\n - no debug info";
  }
  os << "\n - scope info: " << Brief(scope_info());
  if (HasOuterScopeInfo()) {
    os << "\n - outer scope info: " << Brief(GetOuterScopeInfo());
  }
  os << "\n - length: " << length();
  os << "\n - feedback_metadata: ";
  if (HasFeedbackMetadata()) {
    feedback_metadata().FeedbackMetadataPrint(os);
  } else {
    os << "<none>";
  }
  os << "\n";
}

void JSGlobalProxy::JSGlobalProxyPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSGlobalProxy");
  if (!GetIsolate()->bootstrapper()->IsActive()) {
    os << "\n - native context: " << Brief(native_context());
  }
  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 PropertyCell::PropertyCellPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "PropertyCell");
  os << "\n - name: ";
  name().NamePrint(os);
  os << "\n - value: " << Brief(value(kAcquireLoad));
  os << "\n - details: ";
  PropertyDetails details = property_details(kAcquireLoad);
  details.PrintAsSlowTo(os, true);
  os << "\n - cell_type: " << details.cell_type();
  os << "\n";
}

void Code::CodePrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "Code");
  os << "\n";
#ifdef ENABLE_DISASSEMBLER
  Disassemble(nullptr, os, GetIsolate());
#endif
}

void CodeDataContainer::CodeDataContainerPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "CodeDataContainer");
  os << "\n - kind_specific_flags: " << kind_specific_flags();
  os << "\n";
}

void Foreign::ForeignPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "Foreign");
  os << "\n - foreign address : " << reinterpret_cast<void*>(foreign_address());
  os << "\n";
}

void CallbackTask::CallbackTaskPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "CallbackTask");
  os << "\n - callback: " << Brief(callback());
  os << "\n - data: " << Brief(data());
  os << "\n";
}

void CallableTask::CallableTaskPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "CallableTask");
  os << "\n - context: " << Brief(context());
  os << "\n - callable: " << Brief(callable());
  os << "\n";
}

void PromiseFulfillReactionJobTask::PromiseFulfillReactionJobTaskPrint(
    std::ostream& os) {  // NOLINT
  PrintHeader(os, "PromiseFulfillReactionJobTask");
  os << "\n - argument: " << Brief(argument());
  os << "\n - context: " << Brief(context());
  os << "\n - handler: " << Brief(handler());
  os << "\n - promise_or_capability: " << Brief(promise_or_capability());
  os << "\n";
}

void PromiseRejectReactionJobTask::PromiseRejectReactionJobTaskPrint(
    std::ostream& os) {  // NOLINT
  PrintHeader(os, "PromiseRejectReactionJobTask");
  os << "\n - argument: " << Brief(argument());
  os << "\n - context: " << Brief(context());
  os << "\n - handler: " << Brief(handler());
  os << "\n - promise_or_capability: " << Brief(promise_or_capability());
  os << "\n";
}

void PromiseResolveThenableJobTask::PromiseResolveThenableJobTaskPrint(
    std::ostream& os) {  // NOLINT
  PrintHeader(os, "PromiseResolveThenableJobTask");
  os << "\n - context: " << Brief(context());
  os << "\n - promise_to_resolve: " << Brief(promise_to_resolve());
  os << "\n - then: " << Brief(then());
  os << "\n - thenable: " << Brief(thenable());
  os << "\n";
}

void PromiseCapability::PromiseCapabilityPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "PromiseCapability");
  os << "\n - promise: " << Brief(promise());
  os << "\n - resolve: " << Brief(resolve());
  os << "\n - reject: " << Brief(reject());
  os << "\n";
}

void PromiseReaction::PromiseReactionPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "PromiseReaction");
  os << "\n - next: " << Brief(next());
  os << "\n - reject_handler: " << Brief(reject_handler());
  os << "\n - fulfill_handler: " << Brief(fulfill_handler());
  os << "\n - promise_or_capability: " << Brief(promise_or_capability());
  os << "\n";
}

void AsyncGeneratorRequest::AsyncGeneratorRequestPrint(
    std::ostream& os) {  // NOLINT
  PrintHeader(os, "AsyncGeneratorRequest");
  const char* mode = "Invalid!";
  switch (resume_mode()) {
    case JSGeneratorObject::kNext:
      mode = ".next()";
      break;
    case JSGeneratorObject::kReturn:
      mode = ".return()";
      break;
    case JSGeneratorObject::kThrow:
      mode = ".throw()";
      break;
  }
  os << "\n - resume mode: " << mode;
  os << "\n - value: " << Brief(value());
  os << "\n - next: " << Brief(next());
  os << "\n";
}

void SourceTextModuleInfoEntry::SourceTextModuleInfoEntryPrint(
    std::ostream& os) {  // NOLINT
  PrintHeader(os, "SourceTextModuleInfoEntry");
  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";
}

static void PrintModuleFields(Module module, std::ostream& os) {
  os << "\n - exports: " << Brief(module.exports());
  os << "\n - status: " << module.status();
  os << "\n - exception: " << Brief(module.exception());
}

void Module::ModulePrint(std::ostream& os) {  // NOLINT
  if (this->IsSourceTextModule()) {
    SourceTextModule::cast(*this).SourceTextModulePrint(os);
  } else if (this->IsSyntheticModule()) {
    SyntheticModule::cast(*this).SyntheticModulePrint(os);
  } else {
    UNREACHABLE();
  }
}

void SourceTextModule::SourceTextModulePrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "SourceTextModule");
  PrintModuleFields(*this, os);
  os << "\n - sfi/code/info: " << Brief(code());
  Script script = GetScript();
  os << "\n - script: " << Brief(script);
  os << "\n - origin: " << Brief(script.GetNameOrSourceURL());
  os << "\n - requested_modules: " << Brief(requested_modules());
  os << "\n - import_meta: " << Brief(import_meta());
  os << "\n - cycle_root: " << Brief(cycle_root());
  os << "\n - async_evaluating_ordinal: " << async_evaluating_ordinal();
  os << "\n";
}

void SyntheticModule::SyntheticModulePrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "SyntheticModule");
  PrintModuleFields(*this, os);
  os << "\n - export_names: " << Brief(export_names());
  os << "\n - name: " << Brief(name());
  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
  PrintHeader(os, "PrototypeInfo");
  os << "\n - module namespace: " << Brief(module_namespace());
  os << "\n - prototype users: " << Brief(prototype_users());
  os << "\n - registry slot: " << registry_slot();
  os << "\n - object create map: " << Brief(object_create_map());
  os << "\n - should_be_fast_map: " << should_be_fast_map();
  os << "\n";
}

void ClassPositions::ClassPositionsPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "ClassPositions");
  os << "\n - start position: " << start();
  os << "\n - end position: " << end();
  os << "\n";
}

void ArrayBoilerplateDescription::ArrayBoilerplateDescriptionPrint(
    std::ostream& os) {  // NOLINT
  PrintHeader(os, "ArrayBoilerplateDescription");
  os << "\n - elements kind: " << elements_kind();
  os << "\n - constant elements: " << Brief(constant_elements());
  os << "\n";
}

void RegExpBoilerplateDescription::RegExpBoilerplateDescriptionPrint(
    std::ostream& os) {  // NOLINT
  PrintHeader(os, "RegExpBoilerplateDescription");
  os << "\n - data: " << Brief(data());
  os << "\n - source: " << Brief(source());
  os << "\n - flags: " << flags();
  os << "\n";
}

void AsmWasmData::AsmWasmDataPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "AsmWasmData");
  os << "\n - native module: " << Brief(managed_native_module());
  os << "\n - export_wrappers: " << Brief(export_wrappers());
  os << "\n - uses bitset: " << uses_bitset().value();
  os << "\n";
}

void WasmTypeInfo::WasmTypeInfoPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmTypeInfo");
  os << "\n - type address: " << reinterpret_cast<void*>(foreign_address());
  os << "\n";
}

void WasmStruct::WasmStructPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmStruct");
  wasm::StructType* struct_type = type();
  os << "\n - fields (" << struct_type->field_count() << "):";
  for (uint32_t i = 0; i < struct_type->field_count(); i++) {
    wasm::ValueType field = struct_type->field(i);
    os << "\n   - " << field.short_name() << ": ";
    uint32_t field_offset = struct_type->field_offset(i);
    Address field_address = RawField(field_offset).address();
    switch (field.kind()) {
      case wasm::kI32:
        os << base::ReadUnalignedValue<int32_t>(field_address);
        break;
      case wasm::kI64:
        os << base::ReadUnalignedValue<int64_t>(field_address);
        break;
      case wasm::kF32:
        os << base::ReadUnalignedValue<float>(field_address);
        break;
      case wasm::kF64:
        os << base::ReadUnalignedValue<double>(field_address);
        break;
      case wasm::kI8:
      case wasm::kI16:
      case wasm::kS128:
      case wasm::kRef:
      case wasm::kOptRef:
      case wasm::kRtt:
      case wasm::kRttWithDepth:
      case wasm::kBottom:
      case wasm::kStmt:
        os << "UNIMPLEMENTED";  // TODO(7748): Implement.
        break;
    }
  }
  os << "\n";
}

void WasmArray::WasmArrayPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmArray");
  wasm::ArrayType* array_type = type();
  uint32_t len = length();
  os << "\n - type: " << array_type->element_type().name();
  os << "\n - length: " << len;
  Address data_ptr = ptr() + WasmArray::kHeaderSize - kHeapObjectTag;
  switch (array_type->element_type().kind()) {
    case wasm::kI32:
      PrintTypedArrayElements(os, reinterpret_cast<int32_t*>(data_ptr), len,
                              true);
      break;
    case wasm::kI64:
      PrintTypedArrayElements(os, reinterpret_cast<int64_t*>(data_ptr), len,
                              true);
      break;
    case wasm::kF32:
      PrintTypedArrayElements(os, reinterpret_cast<float*>(data_ptr), len,
                              true);
      break;
    case wasm::kF64:
      PrintTypedArrayElements(os, reinterpret_cast<double*>(data_ptr), len,
                              true);
      break;
    case wasm::kI8:
    case wasm::kI16:
    case wasm::kS128:
    case wasm::kRef:
    case wasm::kOptRef:
    case wasm::kRtt:
    case wasm::kRttWithDepth:
    case wasm::kBottom:
    case wasm::kStmt:
      os << "\n   Printing elements of this type is unimplemented, sorry";
      // TODO(7748): Implement.
      break;
  }
  os << "\n";
}

void WasmExceptionTag::WasmExceptionTagPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmExceptionTag");
  os << "\n - index: " << index();
  os << "\n";
}

void WasmInstanceObject::WasmInstanceObjectPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "WasmInstanceObject");
  os << "\n - module_object: " << Brief(module_object());
  os << "\n - exports_object: " << Brief(exports_object());
  os << "\n - native_context: " << Brief(native_context());
  if (has_memory_object()) {
    os << "\n - memory_object: " << Brief(memory_object());
  }
  if (has_untagged_globals_buffer()) {
    os << "\n - untagged_globals_buffer: " << Brief(untagged_globals_buffer());
  }
  if (has_tagged_globals_buffer()) {
    os << "\n - tagged_globals_buffer: " << Brief(tagged_globals_buffer());
  }
  if (has_imported_mutable_globals_buffers()) {
    os << "\n - imported_mutable_globals_buffers: "
       << Brief(imported_mutable_globals_buffers());
  }
  for (int i = 0; i < tables().length(); i++) {
    os << "\n - table " << i << ": " << Brief(tables().get(i));
  }
  os << "\n - imported_function_refs: " << Brief(imported_function_refs());
  if (has_indirect_function_table_refs()) {
    os << "\n - indirect_function_table_refs: "
       << Brief(indirect_function_table_refs());
  }
  if (has_managed_native_allocations()) {
    os << "\n - managed_native_allocations: "
       << Brief(managed_native_allocations());
  }
  os << "\n - memory_start: " << static_cast<void*>(memory_start());
  os << "\n - memory_size: " << memory_size();
  os << "\n - memory_mask: " << AsHex(memory_mask());
  os << "\n - imported_function_targets: "
     << static_cast<void*>(imported_function_targets());
  os << "\n - globals_start: " << static_cast<void*>(globals_start());
  os << "\n - imported_mutable_globals: "
     << static_cast<void*>(imported_mutable_globals());
  os << "\n - indirect_function_table_size: " << indirect_function_table_size();
  os << "\n - indirect_function_table_sig_ids: "
     << static_cast<void*>(indirect_function_table_sig_ids());
  os << "\n - indirect_function_table_targets: "
     << static_cast<void*>(indirect_function_table_targets());
  JSObjectPrintBody(os, *this);
  os << "\n";
}

void WasmExportedFunctionData::WasmExportedFunctionDataPrint(
    std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmExportedFunctionData");
  os << "\n - wrapper_code: " << Brief(wrapper_code());
  os << "\n - instance: " << Brief(instance());
  os << "\n - jump_table_offset: " << jump_table_offset();
  os << "\n - function_index: " << function_index();
  os << "\n";
}

void WasmJSFunctionData::WasmJSFunctionDataPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmJSFunctionData");
  os << "\n - callable: " << Brief(callable());
  os << "\n - wrapper_code: " << Brief(wrapper_code());
  os << "\n";
}

void WasmModuleObject::WasmModuleObjectPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmModuleObject");
  os << "\n - module: " << module();
  os << "\n - native module: " << native_module();
  os << "\n - export wrappers: " << Brief(export_wrappers());
  os << "\n - script: " << Brief(script());
  os << "\n";
}

void WasmTableObject::WasmTableObjectPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmTableObject");
  os << "\n - elements: " << Brief(elements());
  os << "\n - maximum_length: " << Brief(maximum_length());
  os << "\n - dispatch_tables: " << Brief(dispatch_tables());
  os << "\n - raw_type: " << raw_type();
  os << "\n";
}

void WasmValueObject::WasmValueObjectPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmValueObject");
  os << "\n - value: " << Brief(value());
  os << "\n";
}

void WasmGlobalObject::WasmGlobalObjectPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmGlobalObject");
  if (type().is_reference_type()) {
    os << "\n - tagged_buffer: " << Brief(tagged_buffer());
  } else {
    os << "\n - untagged_buffer: " << Brief(untagged_buffer());
  }
  os << "\n - offset: " << offset();
  os << "\n - raw_type: " << raw_type();
  os << "\n - is_mutable: " << is_mutable();
  os << "\n - type: " << type().kind();
  os << "\n - is_mutable: " << is_mutable();
  os << "\n";
}

void WasmMemoryObject::WasmMemoryObjectPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmMemoryObject");
  os << "\n - array_buffer: " << Brief(array_buffer());
  os << "\n - maximum_pages: " << maximum_pages();
  os << "\n - instances: " << Brief(instances());
  os << "\n";
}

void WasmExceptionObject::WasmExceptionObjectPrint(
    std::ostream& os) {  // NOLINT
  PrintHeader(os, "WasmExceptionObject");
  os << "\n - serialized_signature: " << Brief(serialized_signature());
  os << "\n - exception_tag: " << Brief(exception_tag());
  os << "\n";
}

void LoadHandler::LoadHandlerPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "LoadHandler");
  // TODO(ishell): implement printing based on handler kind
  os << "\n - handler: " << Brief(smi_handler());
  os << "\n - validity_cell: " << Brief(validity_cell());
  int data_count = data_field_count();
  if (data_count >= 1) {
    os << "\n - data1: " << Brief(data1());
  }
  if (data_count >= 2) {
    os << "\n - data2: " << Brief(data2());
  }
  if (data_count >= 3) {
    os << "\n - data3: " << Brief(data3());
  }
  os << "\n";
}

void StoreHandler::StoreHandlerPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "StoreHandler");
  // TODO(ishell): implement printing based on handler kind
  os << "\n - handler: " << Brief(smi_handler());
  os << "\n - validity_cell: " << Brief(validity_cell());
  int data_count = data_field_count();
  if (data_count >= 1) {
    os << "\n - data1: " << Brief(data1());
  }
  if (data_count >= 2) {
    os << "\n - data2: " << Brief(data2());
  }
  if (data_count >= 3) {
    os << "\n - data3: " << Brief(data3());
  }
  os << "\n";
}

void AccessorPair::AccessorPairPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "AccessorPair");
  os << "\n - getter: " << Brief(getter());
  os << "\n - setter: " << Brief(setter());
  os << "\n";
}

void CallHandlerInfo::CallHandlerInfoPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "CallHandlerInfo");
  os << "\n - callback: " << Brief(callback());
  os << "\n - js_callback: " << Brief(js_callback());
  os << "\n - data: " << Brief(data());
  os << "\n - side_effect_free: "
     << (IsSideEffectFreeCallHandlerInfo() ? "true" : "false");
  os << "\n";
}

void FunctionTemplateInfo::FunctionTemplateInfoPrint(
    std::ostream& os) {  // NOLINT
  PrintHeader(os, "FunctionTemplateInfo");
  os << "\n - class name: " << Brief(class_name());
  os << "\n - tag: " << tag();
  os << "\n - serial_number: " << serial_number();
  os << "\n - property_list: " << Brief(property_list());
  os << "\n - call_code: " << Brief(call_code(kAcquireLoad));
  os << "\n - property_accessors: " << Brief(property_accessors());
  os << "\n - signature: " << Brief(signature());
  os << "\n - cached_property_name: " << Brief(cached_property_name());
  os << "\n - undetectable: " << (undetectable() ? "true" : "false");
  os << "\n - need_access_check: " << (needs_access_check() ? "true" : "false");
  os << "\n - instantiated: " << (instantiated() ? "true" : "false");
  os << "\n - rare_data: " << Brief(rare_data());
  os << "\n";
}

void WasmIndirectFunctionTable::WasmIndirectFunctionTablePrint(
    std::ostream& os) {
  PrintHeader(os, "WasmIndirectFunctionTable");
  os << "\n - size: " << size();
  os << "\n - sig_ids: " << static_cast<void*>(sig_ids());
  os << "\n - targets: " << static_cast<void*>(targets());
  if (has_managed_native_allocations()) {
    os << "\n - managed_native_allocations: "
       << Brief(managed_native_allocations());
  }
  os << "\n - refs: " << Brief(refs());
  os << "\n";
}

void ObjectTemplateInfo::ObjectTemplateInfoPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "ObjectTemplateInfo");
  os << "\n - tag: " << tag();
  os << "\n - serial_number: " << serial_number();
  os << "\n - property_list: " << Brief(property_list());
  os << "\n - property_accessors: " << Brief(property_accessors());
  os << "\n - constructor: " << Brief(constructor());
  os << "\n - embedder_field_count: " << embedder_field_count();
  os << "\n - immutable_proto: " << (immutable_proto() ? "true" : "false");
  os << "\n";
}

void AllocationSite::AllocationSitePrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "AllocationSite");
  if (this->HasWeakNext()) 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 (!PointsToLiteral()) {
    ElementsKind kind = GetElementsKind();
    os << "Array allocation with ElementsKind " << ElementsKindToString(kind);
  } else if (boilerplate().IsJSArray()) {
    os << "Array literal with boilerplate " << Brief(boilerplate());
  } else {
    os << "Object literal with boilerplate " << Brief(boilerplate());
  }
  os << "\n";
}

void AllocationMemento::AllocationMementoPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "AllocationMemento");
  os << "\n - allocation site: ";
  if (IsValid()) {
    GetAllocationSite().AllocationSitePrint(os);
  } else {
    os << "<invalid>\n";
  }
}

void Script::ScriptPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "Script");
  os << "\n - source: " << Brief(source());
  os << "\n - name: " << Brief(name());
  os << "\n - source_url: " << Brief(source_url());
  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 - compilation type: " << compilation_type();
  os << "\n - line ends: " << Brief(line_ends());
  if (type() == TYPE_WASM) {
    if (has_wasm_breakpoint_infos()) {
      os << "\n - wasm_breakpoint_infos: " << Brief(wasm_breakpoint_infos());
    }
  } else {
    if (has_eval_from_shared()) {
      os << "\n - eval from shared: " << Brief(eval_from_shared());
    }
    if (is_wrapped()) {
      os << "\n - wrapped arguments: " << Brief(wrapped_arguments());
    }
    os << "\n - eval from position: " << eval_from_position();
  }
  os << "\n - shared function infos: " << Brief(shared_function_infos());
  os << "\n";
}

#ifdef V8_INTL_SUPPORT
void JSV8BreakIterator::JSV8BreakIteratorPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSV8BreakIterator");
  os << "\n - locale: " << Brief(locale());
  os << "\n - break iterator: " << Brief(break_iterator());
  os << "\n - unicode string: " << Brief(unicode_string());
  os << "\n - bound adopt text: " << Brief(bound_adopt_text());
  os << "\n - bound first: " << Brief(bound_first());
  os << "\n - bound next: " << Brief(bound_next());
  os << "\n - bound current: " << Brief(bound_current());
  os << "\n - bound break type: " << Brief(bound_break_type());
  os << "\n";
}

void JSCollator::JSCollatorPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSCollator");
  os << "\n - icu collator: " << Brief(icu_collator());
  os << "\n - bound compare: " << Brief(bound_compare());
  JSObjectPrintBody(os, *this);
}

void JSDateTimeFormat::JSDateTimeFormatPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSDateTimeFormat");
  os << "\n - locale: " << Brief(locale());
  os << "\n - icu locale: " << Brief(icu_locale());
  os << "\n - icu simple date format: " << Brief(icu_simple_date_format());
  os << "\n - icu date interval format: " << Brief(icu_date_interval_format());
  os << "\n - bound format: " << Brief(bound_format());
  os << "\n - hour cycle: " << HourCycleAsString();
  JSObjectPrintBody(os, *this);
}

void JSDisplayNames::JSDisplayNamesPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSDisplayNames");
  os << "\n - internal: " << Brief(internal());
  os << "\n - style: " << StyleAsString();
  os << "\n - fallback: " << FallbackAsString();
  JSObjectPrintBody(os, *this);
}

void JSListFormat::JSListFormatPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSListFormat");
  os << "\n - locale: " << Brief(locale());
  os << "\n - style: " << StyleAsString();
  os << "\n - type: " << TypeAsString();
  os << "\n - icu formatter: " << Brief(icu_formatter());
  JSObjectPrintBody(os, *this);
}

void JSLocale::JSLocalePrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSLocale");
  os << "\n - icu locale: " << Brief(icu_locale());
  JSObjectPrintBody(os, *this);
}

void JSNumberFormat::JSNumberFormatPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSNumberFormat");
  os << "\n - locale: " << Brief(locale());
  os << "\n - icu_number_formatter: " << Brief(icu_number_formatter());
  os << "\n - bound_format: " << Brief(bound_format());
  JSObjectPrintBody(os, *this);
}

void JSPluralRules::JSPluralRulesPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSPluralRules");
  os << "\n - locale: " << Brief(locale());
  os << "\n - type: " << TypeAsString();
  os << "\n - icu plural rules: " << Brief(icu_plural_rules());
  os << "\n - icu_number_formatter: " << Brief(icu_number_formatter());
  JSObjectPrintBody(os, *this);
}

void JSRelativeTimeFormat::JSRelativeTimeFormatPrint(
    std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSRelativeTimeFormat");
  os << "\n - locale: " << Brief(locale());
  os << "\n - numberingSystem: " << Brief(numberingSystem());
  os << "\n - numeric: " << NumericAsString();
  os << "\n - icu formatter: " << Brief(icu_formatter());
  os << "\n";
}

void JSSegmentIterator::JSSegmentIteratorPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSSegmentIterator");
  os << "\n - icu break iterator: " << Brief(icu_break_iterator());
  os << "\n - granularity: " << GranularityAsString(GetIsolate());
  os << "\n";
}

void JSSegmenter::JSSegmenterPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSSegmenter");
  os << "\n - locale: " << Brief(locale());
  os << "\n - granularity: " << GranularityAsString(GetIsolate());
  os << "\n - icu break iterator: " << Brief(icu_break_iterator());
  JSObjectPrintBody(os, *this);
}

void JSSegments::JSSegmentsPrint(std::ostream& os) {  // NOLINT
  JSObjectPrintHeader(os, *this, "JSSegments");
  os << "\n - icu break iterator: " << Brief(icu_break_iterator());
  os << "\n - unicode string: " << Brief(unicode_string());
  os << "\n - granularity: " << GranularityAsString(GetIsolate());
  JSObjectPrintBody(os, *this);
}
#endif  // V8_INTL_SUPPORT

namespace {
void PrintScopeInfoList(ScopeInfo scope_info, std::ostream& os,
                        const char* list_name, int nof_internal_slots,
                        int start, int length) {
  if (length <= 0) return;
  int end = start + length;
  os << "\n - " << list_name;
  if (nof_internal_slots > 0) {
    os << " " << start << "-" << end << " [internal slots]";
  }
  os << " {\n";
  for (int i = nof_internal_slots; start < end; ++i, ++start) {
    os << "    - " << i << ": ";
    String::cast(scope_info.get(start)).ShortPrint(os);
    os << "\n";
  }
  os << "  }";
}
}  // namespace

void ScopeInfo::ScopeInfoPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "ScopeInfo");
  if (length() == 0) {
    os << "\n - length = 0\n";
    return;
  }
  int flags = Flags();

  os << "\n - parameters: " << ParameterCount();
  os << "\n - context locals : " << ContextLocalCount();

  os << "\n - scope type: " << scope_type();
  if (SloppyEvalCanExtendVars()) os << "\n - sloppy eval";
  os << "\n - language mode: " << language_mode();
  if (is_declaration_scope()) os << "\n - declaration scope";
  if (HasReceiver()) {
    os << "\n - receiver: " << ReceiverVariableBits::decode(flags);
  }
  if (HasClassBrand()) os << "\n - has class brand";
  if (HasSavedClassVariableIndex()) os << "\n - has saved class variable index";
  if (HasNewTarget()) os << "\n - needs new target";
  if (HasFunctionName()) {
    os << "\n - function name(" << FunctionVariableBits::decode(flags) << "): ";
    FunctionName().ShortPrint(os);
  }
  if (IsAsmModule()) os << "\n - asm module";
  if (HasSimpleParameters()) os << "\n - simple parameters";
  os << "\n - function kind: " << function_kind();
  if (HasOuterScopeInfo()) {
    os << "\n - outer scope info: " << Brief(OuterScopeInfo());
  }
  if (HasLocalsBlockList()) {
    os << "\n - locals blocklist: " << Brief(LocalsBlockList());
  }
  if (HasFunctionName()) {
    os << "\n - function name: " << Brief(FunctionName());
  }
  if (HasInferredFunctionName()) {
    os << "\n - inferred function name: " << Brief(InferredFunctionName());
  }
  if (HasContextExtensionSlot()) {
    os << "\n - has context extension slot";
  }

  if (HasPositionInfo()) {
    os << "\n - start position: " << StartPosition();
    os << "\n - end position: " << EndPosition();
  }
  os << "\n - length: " << length();
  if (length() > 0) {
    PrintScopeInfoList(*this, os, "context slots", Context::MIN_CONTEXT_SLOTS,
                       ContextLocalNamesIndex(), ContextLocalCount());
    // TODO(neis): Print module stuff if present.
  }
  os << "\n";
}

void StackFrameInfo::StackFrameInfoPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "StackFrameInfo");
  os << "\n - receiver_or_instance: " << Brief(receiver_or_instance());
  os << "\n - function: " << Brief(function());
  os << "\n - code_object: " << Brief(code_object());
  os << "\n - code_offset_or_source_position: "
     << code_offset_or_source_position();
  os << "\n - flags: " << flags();
  os << "\n - parameters: " << Brief(parameters());
  os << "\n";
}

void PreparseData::PreparseDataPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "PreparseData");
  os << "\n - data_length: " << data_length();
  os << "\n - children_length: " << children_length();
  if (data_length() > 0) {
    os << "\n - data-start: " << (address() + kDataStartOffset);
  }
  if (children_length() > 0) {
    os << "\n - children-start: " << inner_start_offset();
  }
  for (int i = 0; i < children_length(); ++i) {
    os << "\n - [" << i << "]: " << Brief(get_child(i));
  }
  os << "\n";
}

void InterpreterData::InterpreterDataPrint(std::ostream& os) {  // NOLINT
  PrintHeader(os, "InterpreterData");
  os << "\n - bytecode_array: " << Brief(bytecode_array());
  os << "\n - interpreter_trampoline: " << Brief(interpreter_trampoline());
  os << "\n";
}

template <HeapObjectReferenceType kRefType, typename StorageType>
void TaggedImpl<kRefType, StorageType>::Print() {
  StdoutStream os;
  this->Print(os);
  os << std::flush;
}

template <HeapObjectReferenceType kRefType, typename StorageType>
void TaggedImpl<kRefType, StorageType>::Print(std::ostream& os) {
  Smi smi;
  HeapObject heap_object;
  if (ToSmi(&smi)) {
    smi.SmiPrint(os);
  } else if (IsCleared()) {
    os << "[cleared]";
  } else if (GetHeapObjectIfWeak(&heap_object)) {
    os << "[weak] ";
    heap_object.HeapObjectPrint(os);
  } else if (GetHeapObjectIfStrong(&heap_object)) {
    heap_object.HeapObjectPrint(os);
  } else {
    UNREACHABLE();
  }
}

void HeapNumber::HeapNumberPrint(std::ostream& os) {
  HeapNumberShortPrint(os);
  os << "\n";
}

#endif  // OBJECT_PRINT

void HeapNumber::HeapNumberShortPrint(std::ostream& os) {
  static constexpr uint64_t kUint64AllBitsSet =
      static_cast<uint64_t>(int64_t{-1});
  // Min/max integer values representable by 52 bits of mantissa and 1 sign bit.
  static constexpr int64_t kMinSafeInteger =
      static_cast<int64_t>(kUint64AllBitsSet << 53);
  static constexpr int64_t kMaxSafeInteger = -(kMinSafeInteger + 1);

  double val = value();
  if (val == DoubleToInteger(val) &&
      val >= static_cast<double>(kMinSafeInteger) &&
      val <= static_cast<double>(kMaxSafeInteger)) {
    int64_t i = static_cast<int64_t>(val);
    os << i << ".0";
  } else {
    os << val;
  }
}

// TODO(cbruni): remove once the new maptracer is in place.
void Name::NameShortPrint() {
  if (this->IsString()) {
    PrintF("%s", String::cast(*this).ToCString().get());
  } else {
    DCHECK(this->IsSymbol());
    Symbol s = Symbol::cast(*this);
    if (s.description().IsUndefined()) {
      PrintF("#<%s>", s.PrivateSymbolToName());
    } else {
      PrintF("<%s>", String::cast(s.description()).ToCString().get());
    }
  }
}

// TODO(cbruni): remove once the new maptracer is in place.
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.description().IsUndefined()) {
      return SNPrintF(str, "#<%s>", s.PrivateSymbolToName());
    } else {
      return SNPrintF(str, "<%s>",
                      String::cast(s.description()).ToCString().get());
    }
  }
}

void Map::PrintMapDetails(std::ostream& os) {
  DisallowGarbageCollection no_gc;
  this->MapPrint(os);
  instance_descriptors(kRelaxedLoad).PrintDescriptors(os);
}

void Map::MapPrint(std::ostream& os) {  // NOLINT
#ifdef OBJECT_PRINT
  PrintHeader(os, "Map");
#else
  os << "Map=" << reinterpret_cast<void*>(ptr());
#endif
  os << "\n - type: " << instance_type();
  os << "\n - instance size: ";
  if (instance_size() == kVariableSizeSentinel) {
    os << "variable";
  } else {
    os << instance_size();
  }
  if (IsJSObjectMap()) {
    os << "\n - inobject properties: " << GetInObjectProperties();
  }
  os << "\n - elements kind: " << ElementsKindToString(elements_kind());
  os << "\n - unused property fields: " << UnusedPropertyFields();
  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_named_interceptor()) os << "\n - named_interceptor";
  if (has_indexed_interceptor()) os << "\n - indexed_interceptor";
  if (may_have_interesting_symbols()) os << "\n - may_have_interesting_symbols";
  if (is_undetectable()) os << "\n - undetectable";
  if (is_callable()) os << "\n - callable";
  if (is_constructor()) os << "\n - constructor";
  if (has_prototype_slot()) {
    os << "\n - has_prototype_slot";
    if (has_non_instance_prototype()) os << " (non-instance prototype)";
  }
  if (is_access_check_needed()) os << "\n - access_check_needed";
  if (!is_extensible()) os << "\n - non-extensible";
  if (IsContextMap()) {
    os << "\n - native context: " << Brief(native_context());
  } else if (is_prototype_map()) {
    os << "\n - prototype_map";
    os << "\n - prototype info: " << Brief(prototype_info());
  } else {
    os << "\n - back pointer: " << Brief(GetBackPointer());
  }
  os << "\n - prototype_validity cell: " << Brief(prototype_validity_cell());
  os << "\n - instance descriptors " << (owns_descriptors() ? "(own) " : "")
     << "#" << NumberOfOwnDescriptors() << ": "
     << Brief(instance_descriptors(kRelaxedLoad));

  // Read-only maps can't have transitions, which is fortunate because we need
  // the isolate to iterate over the transitions.
  if (!IsReadOnlyHeapObject(*this)) {
    Isolate* isolate = GetIsolateFromWritableObject(*this);
    DisallowGarbageCollection no_gc;
    TransitionsAccessor transitions(isolate, *this, &no_gc);
    int nof_transitions = transitions.NumberOfTransitions();
    if (nof_transitions > 0) {
      os << "\n - transitions #" << nof_transitions << ": ";
      HeapObject heap_object;
      Smi smi;
      if (raw_transitions()->ToSmi(&smi)) {
        os << Brief(smi);
      } else if (raw_transitions()->GetHeapObject(&heap_object)) {
        os << Brief(heap_object);
      }
#ifdef OBJECT_PRINT
      transitions.PrintTransitions(os);
#endif  // OBJECT_PRINT
    }
  }
  os << "\n - prototype: " << Brief(prototype());
  if (!IsContextMap()) {
    os << "\n - constructor: " << Brief(GetConstructor());
  }
  os << "\n - dependent code: " << Brief(dependent_code());
  os << "\n - construction counter: " << construction_counter();
  os << "\n";
}

void DescriptorArray::PrintDescriptors(std::ostream& os) {
  for (InternalIndex i : InternalIndex::Range(number_of_descriptors())) {
    Name key = GetKey(i);
    os << "\n  [" << i.as_int() << "]: ";
#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,
                                             InternalIndex descriptor,
                                             PropertyDetails::PrintMode mode) {
  PropertyDetails details = GetDetails(descriptor);
  details.PrintAsFastTo(os, mode);
  os << " @ ";
  switch (details.location()) {
    case kField: {
      FieldType field_type = GetFieldType(descriptor);
      field_type.PrintTo(os);
      break;
    }
    case kDescriptor:
      Object value = GetStrongValue(descriptor);
      os << Brief(value);
      if (value.IsAccessorPair()) {
        AccessorPair pair = AccessorPair::cast(value);
        os << "(get: " << Brief(pair.getter())
           << ", set: " << Brief(pair.setter()) << ")";
      }
      break;
  }
}

#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 = nullptr;
  if (buffer != nullptr) delete[] buffer;
  buffer = new char[length() + 1];
  WriteToFlat(*this, reinterpret_cast<uint8_t*>(buffer), 0, length());
  buffer[length()] = 0;
  return buffer;
}

// static
void TransitionsAccessor::PrintOneTransition(std::ostream& os, Name key,
                                             Map target) {
  os << "\n     ";
#ifdef OBJECT_PRINT
  key.NamePrint(os);
#else
  key.ShortPrint(os);
#endif
  os << ": ";
  ReadOnlyRoots roots = key.GetReadOnlyRoots();
  if (key == roots.nonextensible_symbol()) {
    os << "(transition to non-extensible)";
  } else if (key == roots.sealed_symbol()) {
    os << "(transition to sealed)";
  } else if (key == roots.frozen_symbol()) {
    os << "(transition to frozen)";
  } else if (key == roots.elements_transition_symbol()) {
    os << "(transition to " << ElementsKindToString(target.elements_kind())
       << ")";
  } else if (key == roots.strict_function_transition_symbol()) {
    os << " (transition to strict function)";
  } else {
    DCHECK(!IsSpecialTransition(roots, key));
    os << "(transition to ";
    InternalIndex descriptor = target.LastAdded();
    DescriptorArray descriptors = target.instance_descriptors(kRelaxedLoad);
    descriptors.PrintDescriptorDetails(os, descriptor,
                                       PropertyDetails::kForTransitions);
    os << ")";
  }
  os << " -> " << Brief(target);
}

void TransitionArray::PrintInternal(std::ostream& os) {
  int num_transitions = number_of_transitions();
  os << "Transition array #" << num_transitions << ":";
  for (int i = 0; i < num_transitions; i++) {
    Name key = GetKey(i);
    Map target = GetTarget(i);
    TransitionsAccessor::PrintOneTransition(os, key, target);
  }
  os << "\n" << std::flush;
}

void TransitionsAccessor::PrintTransitions(std::ostream& os) {  // NOLINT
  switch (encoding()) {
    case kPrototypeInfo:
    case kUninitialized:
    case kMigrationTarget:
      return;
    case kWeakRef: {
      Map target = Map::cast(raw_transitions_->GetHeapObjectAssumeWeak());
      Name key = GetSimpleTransitionKey(target);
      PrintOneTransition(os, key, target);
      break;
    }
    case kFullTransitionArray:
      return transitions().PrintInternal(os);
  }
}

void TransitionsAccessor::PrintTransitionTree() {
  StdoutStream os;
  os << "map= " << Brief(map_);
  DisallowGarbageCollection no_gc;
  PrintTransitionTree(os, 0, &no_gc);
  os << "\n" << std::flush;
}

void TransitionsAccessor::PrintTransitionTree(
    std::ostream& os, int level, DisallowGarbageCollection* no_gc) {
  ReadOnlyRoots roots = ReadOnlyRoots(isolate_);
  int num_transitions = NumberOfTransitions();
  if (num_transitions == 0) return;
  for (int i = 0; i < num_transitions; i++) {
    Name key = GetKey(i);
    Map target = GetTarget(i);
    os << std::endl
       << "  " << level << "/" << i << ":" << std::setw(level * 2 + 2) << " ";
    std::stringstream ss;
    ss << Brief(target);
    os << std::left << std::setw(50) << ss.str() << ": ";

    if (key == roots.nonextensible_symbol()) {
      os << "to non-extensible";
    } else if (key == roots.sealed_symbol()) {
      os << "to sealed ";
    } else if (key == roots.frozen_symbol()) {
      os << "to frozen";
    } else if (key == roots.elements_transition_symbol()) {
      os << "to " << ElementsKindToString(target.elements_kind());
    } else if (key == roots.strict_function_transition_symbol()) {
      os << "to strict function";
    } else {
#ifdef OBJECT_PRINT
      key.NamePrint(os);
#else
      key.ShortPrint(os);
#endif
      os << " ";
      DCHECK(!IsSpecialTransition(ReadOnlyRoots(isolate_), key));
      os << "to ";
      InternalIndex descriptor = target.LastAdded();
      DescriptorArray descriptors = target.instance_descriptors(kRelaxedLoad);
      descriptors.PrintDescriptorDetails(os, descriptor,
                                         PropertyDetails::kForTransitions);
    }
    TransitionsAccessor transitions(isolate_, target, no_gc);
    transitions.PrintTransitionTree(os, level + 1, no_gc);
  }
}

void JSObject::PrintTransitions(std::ostream& os) {  // NOLINT
  DisallowGarbageCollection no_gc;
  TransitionsAccessor ta(GetIsolate(), map(), &no_gc);
  if (ta.NumberOfTransitions() == 0) return;
  os << "\n - transitions";
  ta.PrintTransitions(os);
}

#endif  // defined(DEBUG) || defined(OBJECT_PRINT)
}  // namespace internal
}  // namespace v8

namespace {

inline i::Object GetObjectFromRaw(void* object) {
  i::Address object_ptr = reinterpret_cast<i::Address>(object);
#ifdef V8_COMPRESS_POINTERS
  if (RoundDown<i::kPtrComprIsolateRootAlignment>(object_ptr) ==
      i::kNullAddress) {
    // Try to decompress pointer.
    i::Isolate* isolate = i::Isolate::Current();
    object_ptr = i::DecompressTaggedAny(isolate->isolate_root(),
                                        static_cast<i::Tagged_t>(object_ptr));
  }
#endif
  return i::Object(object_ptr);
}

}  // namespace

//
// The following functions are used by our gdb macros.
//
V8_EXPORT_PRIVATE extern i::Object _v8_internal_Get_Object(void* object) {
  return GetObjectFromRaw(object);
}

V8_EXPORT_PRIVATE extern void _v8_internal_Print_Object(void* object) {
  GetObjectFromRaw(object).Print();
}

V8_EXPORT_PRIVATE extern void _v8_internal_Print_Code(void* object) {
  i::Address address = reinterpret_cast<i::Address>(object);
  i::Isolate* isolate = i::Isolate::Current();

  {
    i::wasm::WasmCodeRefScope scope;
    i::wasm::WasmCode* wasm_code =
        isolate->wasm_engine()->code_manager()->LookupCode(address);
    if (wasm_code) {
      i::StdoutStream os;
      wasm_code->Disassemble(nullptr, os, address);
      return;
    }
  }

  if (!isolate->heap()->InSpaceSlow(address, i::CODE_SPACE) &&
      !isolate->heap()->InSpaceSlow(address, i::CODE_LO_SPACE) &&
      !i::InstructionStream::PcIsOffHeap(isolate, address) &&
      !i::ReadOnlyHeap::Contains(address)) {
    i::PrintF(
        "%p is not within the current isolate's code, read_only or embedded "
        "spaces\n",
        object);
    return;
  }

  i::Code code = isolate->FindCodeObject(address);
  if (!code.IsCode()) {
    i::PrintF("No code object found containing %p\n", object);
    return;
  }
#ifdef ENABLE_DISASSEMBLER
  i::StdoutStream os;
  code.Disassemble(nullptr, os, isolate, address);
#else   // ENABLE_DISASSEMBLER
  code.Print();
#endif  // ENABLE_DISASSEMBLER
}

V8_EXPORT_PRIVATE extern void _v8_internal_Print_StackTrace() {
  i::Isolate* isolate = i::Isolate::Current();
  isolate->PrintStack(stdout);
}

V8_EXPORT_PRIVATE extern void _v8_internal_Print_TransitionTree(void* object) {
  i::Object o(GetObjectFromRaw(object));
  if (!o.IsMap()) {
    printf("Please provide a valid Map\n");
  } else {
#if defined(DEBUG) || defined(OBJECT_PRINT)
    i::DisallowGarbageCollection no_gc;
    i::Map map = i::Map::unchecked_cast(o);
    i::TransitionsAccessor transitions(i::Isolate::Current(), map, &no_gc);
    transitions.PrintTransitionTree();
#endif
  }
}