text: // Copyright 2010 the V8 project authors. All rights reserved.
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  //       notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  //       copyright notice, this list of conditions and the following
  //       disclaimer in the documentation and/or other materials provided
  //       with the distribution.
  //     * Neither the name of Google Inc. nor the names of its
  //       contributors may be used to endorse or promote products derived
  //       from this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #include "v8.h"
  
  #include "api.h"
  
  #include "arguments.h"
  #include "bootstrapper.h"
  #include "compiler.h"
  #include "debug.h"
  #include "deoptimizer.h"
  #include "execution.h"
  #include "global-handles.h"
  #include "heap-profiler.h"
  #include "messages.h"
  #include "parser.h"
  #include "platform.h"
  #include "profile-generator-inl.h"
  #include "runtime-profiler.h"
  #include "serialize.h"
  #include "snapshot.h"
  #include "top.h"
  #include "v8threads.h"
  #include "version.h"
  #include "vm-state-inl.h"
  
  #include "../include/v8-profiler.h"
  #include "../include/v8-testing.h"
  
  #define LOG_API(expr) LOG(ApiEntryCall(expr))
  
  #ifdef ENABLE_VMSTATE_TRACKING
  #define ENTER_V8 ASSERT(i::V8::IsRunning()); i::VMState __state__(i::OTHER)
  #define LEAVE_V8 i::VMState __state__(i::EXTERNAL)
  #else
  #define ENTER_V8 ((void) 0)
  #define LEAVE_V8 ((void) 0)
  #endif
  
  namespace v8 {
  
  #define ON_BAILOUT(location, code)                                 \
    if (IsDeadCheck(location) || v8::V8::IsExecutionTerminating()) { \
      code;                                                          \
      UNREACHABLE();                                                 \
    }
  
  
  #define EXCEPTION_PREAMBLE()                                      \
    thread_local.IncrementCallDepth();                              \
    ASSERT(!i::Top::external_caught_exception());                   \
    bool has_pending_exception = false
  
  
  #define EXCEPTION_BAILOUT_CHECK(value)                                         \
    do {                                                                         \
      thread_local.DecrementCallDepth();                                         \
      if (has_pending_exception) {                                               \
        if (thread_local.CallDepthIsZero() && i::Top::is_out_of_memory()) {      \
          if (!thread_local.ignore_out_of_memory())                              \
            i::V8::FatalProcessOutOfMemory(NULL);                                \
        }                                                                        \
        bool call_depth_is_zero = thread_local.CallDepthIsZero();                \
        i::Top::OptionalRescheduleException(call_depth_is_zero);                 \
        return value;                                                            \
      }                                                                          \
    } while (false)
  
  
  #define API_ENTRY_CHECK(msg)                                                   \
    do {                                                                         \
      if (v8::Locker::IsActive()) {                                              \
        ApiCheck(i::ThreadManager::IsLockedByCurrentThread(),                    \
                 msg,                                                            \
                 "Entering the V8 API without proper locking in place");         \
      }                                                                          \
    } while (false)
  
  
  // --- D a t a   t h a t   i s   s p e c i f i c   t o   a   t h r e a d ---
  
  
  static i::HandleScopeImplementer thread_local;
  
  
  // --- E x c e p t i o n   B e h a v i o r ---
  
  
  static FatalErrorCallback exception_behavior = NULL;
  
  static void DefaultFatalErrorHandler(const char* location,
                                       const char* message) {
    ENTER_V8;
    API_Fatal(location, message);
  }
  
  
  static FatalErrorCallback& GetFatalErrorHandler() {
    if (exception_behavior == NULL) {
      exception_behavior = DefaultFatalErrorHandler;
    }
    return exception_behavior;
  }
  
  
  void i::FatalProcessOutOfMemory(const char* location) {
    i::V8::FatalProcessOutOfMemory(location, false);
  }
  
  
  // When V8 cannot allocated memory FatalProcessOutOfMemory is called.
  // The default fatal error handler is called and execution is stopped.
  void i::V8::FatalProcessOutOfMemory(const char* location, bool take_snapshot) {
    i::HeapStats heap_stats;
    int start_marker;
    heap_stats.start_marker = &start_marker;
    int new_space_size;
    heap_stats.new_space_size = &new_space_size;
    int new_space_capacity;
    heap_stats.new_space_capacity = &new_space_capacity;
    intptr_t old_pointer_space_size;
    heap_stats.old_pointer_space_size = &old_pointer_space_size;
    intptr_t old_pointer_space_capacity;
    heap_stats.old_pointer_space_capacity = &old_pointer_space_capacity;
    intptr_t old_data_space_size;
    heap_stats.old_data_space_size = &old_data_space_size;
    intptr_t old_data_space_capacity;
    heap_stats.old_data_space_capacity = &old_data_space_capacity;
    intptr_t code_space_size;
    heap_stats.code_space_size = &code_space_size;
    intptr_t code_space_capacity;
    heap_stats.code_space_capacity = &code_space_capacity;
    intptr_t map_space_size;
    heap_stats.map_space_size = &map_space_size;
    intptr_t map_space_capacity;
    heap_stats.map_space_capacity = &map_space_capacity;
    intptr_t cell_space_size;
    heap_stats.cell_space_size = &cell_space_size;
    intptr_t cell_space_capacity;
    heap_stats.cell_space_capacity = &cell_space_capacity;
    intptr_t lo_space_size;
    heap_stats.lo_space_size = &lo_space_size;
    int global_handle_count;
    heap_stats.global_handle_count = &global_handle_count;
    int weak_global_handle_count;
    heap_stats.weak_global_handle_count = &weak_global_handle_count;
    int pending_global_handle_count;
    heap_stats.pending_global_handle_count = &pending_global_handle_count;
    int near_death_global_handle_count;
    heap_stats.near_death_global_handle_count = &near_death_global_handle_count;
    int destroyed_global_handle_count;
    heap_stats.destroyed_global_handle_count = &destroyed_global_handle_count;
    intptr_t memory_allocator_size;
    heap_stats.memory_allocator_size = &memory_allocator_size;
    intptr_t memory_allocator_capacity;
    heap_stats.memory_allocator_capacity = &memory_allocator_capacity;
    int objects_per_type[LAST_TYPE + 1] = {0};
    heap_stats.objects_per_type = objects_per_type;
    int size_per_type[LAST_TYPE + 1] = {0};
    heap_stats.size_per_type = size_per_type;
    int os_error;
    heap_stats.os_error = &os_error;
    int end_marker;
    heap_stats.end_marker = &end_marker;
    i::Heap::RecordStats(&heap_stats, take_snapshot);
    i::V8::SetFatalError();
    FatalErrorCallback callback = GetFatalErrorHandler();
    {
      LEAVE_V8;
      callback(location, "Allocation failed - process out of memory");
    }
    // If the callback returns, we stop execution.
    UNREACHABLE();
  }
  
  
  void V8::SetFatalErrorHandler(FatalErrorCallback that) {
    exception_behavior = that;
  }
  
  
  bool Utils::ReportApiFailure(const char* location, const char* message) {
    FatalErrorCallback callback = GetFatalErrorHandler();
    callback(location, message);
    i::V8::SetFatalError();
    return false;
  }
  
  
  bool V8::IsDead() {
    return i::V8::IsDead();
  }
  
  
  static inline bool ApiCheck(bool condition,
                              const char* location,
                              const char* message) {
    return condition ? true : Utils::ReportApiFailure(location, message);
  }
  
  
  static bool ReportV8Dead(const char* location) {
    FatalErrorCallback callback = GetFatalErrorHandler();
    callback(location, "V8 is no longer usable");
    return true;
  }
  
  
  static bool ReportEmptyHandle(const char* location) {
    FatalErrorCallback callback = GetFatalErrorHandler();
    callback(location, "Reading from empty handle");
    return true;
  }
  
  
  /**
   * IsDeadCheck checks that the vm is usable.  If, for instance, the vm has been
   * out of memory at some point this check will fail.  It should be called on
   * entry to all methods that touch anything in the heap, except destructors
   * which you sometimes can't avoid calling after the vm has crashed.  Functions
   * that call EnsureInitialized or ON_BAILOUT don't have to also call
   * IsDeadCheck.  ON_BAILOUT has the advantage over EnsureInitialized that you
   * can arrange to return if the VM is dead.  This is needed to ensure that no VM
   * heap allocations are attempted on a dead VM.  EnsureInitialized has the
   * advantage over ON_BAILOUT that it actually initializes the VM if this has not
   * yet been done.
   */
  static inline bool IsDeadCheck(const char* location) {
    return !i::V8::IsRunning()
        && i::V8::IsDead() ? ReportV8Dead(location) : false;
  }
  
  
  static inline bool EmptyCheck(const char* location, v8::Handle<v8::Data> obj) {
    return obj.IsEmpty() ? ReportEmptyHandle(location) : false;
  }
  
  
  static inline bool EmptyCheck(const char* location, const v8::Data* obj) {
    return (obj == 0) ? ReportEmptyHandle(location) : false;
  }
  
  // --- S t a t i c s ---
  
  
  static i::StringInputBuffer write_input_buffer;
  
  
  static inline bool EnsureInitialized(const char* location) {
    if (i::V8::IsRunning()) {
      return true;
    }
    if (IsDeadCheck(location)) {
      return false;
    }
    return ApiCheck(v8::V8::Initialize(), location, "Error initializing V8");
  }
  
  
  ImplementationUtilities::HandleScopeData*
      ImplementationUtilities::CurrentHandleScope() {
    return &i::HandleScope::current_;
  }
  
  
  #ifdef DEBUG
  void ImplementationUtilities::ZapHandleRange(i::Object** begin,
                                               i::Object** end) {
    i::HandleScope::ZapRange(begin, end);
  }
  #endif
  
  
  v8::Handle<v8::Primitive> ImplementationUtilities::Undefined() {
    if (!EnsureInitialized("v8::Undefined()")) return v8::Handle<v8::Primitive>();
    return v8::Handle<Primitive>(ToApi<Primitive>(i::Factory::undefined_value()));
  }
  
  
  v8::Handle<v8::Primitive> ImplementationUtilities::Null() {
    if (!EnsureInitialized("v8::Null()")) return v8::Handle<v8::Primitive>();
    return v8::Handle<Primitive>(ToApi<Primitive>(i::Factory::null_value()));
  }
  
  
  v8::Handle<v8::Boolean> ImplementationUtilities::True() {
    if (!EnsureInitialized("v8::True()")) return v8::Handle<v8::Boolean>();
    return v8::Handle<v8::Boolean>(ToApi<Boolean>(i::Factory::true_value()));
  }
  
  
  v8::Handle<v8::Boolean> ImplementationUtilities::False() {
    if (!EnsureInitialized("v8::False()")) return v8::Handle<v8::Boolean>();
    return v8::Handle<v8::Boolean>(ToApi<Boolean>(i::Factory::false_value()));
  }
  
  
  void V8::SetFlagsFromString(const char* str, int length) {
    i::FlagList::SetFlagsFromString(str, length);
  }
  
  
  void V8::SetFlagsFromCommandLine(int* argc, char** argv, bool remove_flags) {
    i::FlagList::SetFlagsFromCommandLine(argc, argv, remove_flags);
  }
  
  
  v8::Handle<Value> ThrowException(v8::Handle<v8::Value> value) {
    if (IsDeadCheck("v8::ThrowException()")) return v8::Handle<Value>();
    ENTER_V8;
    // If we're passed an empty handle, we throw an undefined exception
    // to deal more gracefully with out of memory situations.
    if (value.IsEmpty()) {
      i::Top::ScheduleThrow(i::Heap::undefined_value());
    } else {
      i::Top::ScheduleThrow(*Utils::OpenHandle(*value));
    }
    return v8::Undefined();
  }
  
  
  RegisteredExtension* RegisteredExtension::first_extension_ = NULL;
  
  
  RegisteredExtension::RegisteredExtension(Extension* extension)
      : extension_(extension), state_(UNVISITED) { }
  
  
  void RegisteredExtension::Register(RegisteredExtension* that) {
    that->next_ = RegisteredExtension::first_extension_;
    RegisteredExtension::first_extension_ = that;
  }
  
  
  void RegisterExtension(Extension* that) {
    RegisteredExtension* extension = new RegisteredExtension(that);
    RegisteredExtension::Register(extension);
  }
  
  
  Extension::Extension(const char* name,
                       const char* source,
                       int dep_count,
                       const char** deps)
      : name_(name),
        source_(source),
        dep_count_(dep_count),
        deps_(deps),
        auto_enable_(false) { }
  
  
  v8::Handle<Primitive> Undefined() {
    LOG_API("Undefined");
    return ImplementationUtilities::Undefined();
  }
  
  
  v8::Handle<Primitive> Null() {
    LOG_API("Null");
    return ImplementationUtilities::Null();
  }
  
  
  v8::Handle<Boolean> True() {
    LOG_API("True");
    return ImplementationUtilities::True();
  }
  
  
  v8::Handle<Boolean> False() {
    LOG_API("False");
    return ImplementationUtilities::False();
  }
  
  
  ResourceConstraints::ResourceConstraints()
    : max_young_space_size_(0),
      max_old_space_size_(0),
      max_executable_size_(0),
      stack_limit_(NULL) { }
  
  
  bool SetResourceConstraints(ResourceConstraints* constraints) {
    int young_space_size = constraints->max_young_space_size();
    int old_gen_size = constraints->max_old_space_size();
    int max_executable_size = constraints->max_executable_size();
    if (young_space_size != 0 || old_gen_size != 0 || max_executable_size != 0) {
      bool result = i::Heap::ConfigureHeap(young_space_size / 2,
                                           old_gen_size,
                                           max_executable_size);
      if (!result) return false;
    }
    if (constraints->stack_limit() != NULL) {
      uintptr_t limit = reinterpret_cast<uintptr_t>(constraints->stack_limit());
      i::StackGuard::SetStackLimit(limit);
    }
    return true;
  }
  
  
  i::Object** V8::GlobalizeReference(i::Object** obj) {
    if (IsDeadCheck("V8::Persistent::New")) return NULL;
    LOG_API("Persistent::New");
    i::Handle<i::Object> result =
        i::GlobalHandles::Create(*obj);
    return result.location();
  }
  
  
  void V8::MakeWeak(i::Object** object, void* parameters,
                    WeakReferenceCallback callback) {
    LOG_API("MakeWeak");
    i::GlobalHandles::MakeWeak(object, parameters, callback);
  }
  
  
  void V8::ClearWeak(i::Object** obj) {
    LOG_API("ClearWeak");
    i::GlobalHandles::ClearWeakness(obj);
  }
  
  
  bool V8::IsGlobalNearDeath(i::Object** obj) {
    LOG_API("IsGlobalNearDeath");
    if (!i::V8::IsRunning()) return false;
    return i::GlobalHandles::IsNearDeath(obj);
  }
  
  
  bool V8::IsGlobalWeak(i::Object** obj) {
    LOG_API("IsGlobalWeak");
    if (!i::V8::IsRunning()) return false;
    return i::GlobalHandles::IsWeak(obj);
  }
  
  
  void V8::DisposeGlobal(i::Object** obj) {
    LOG_API("DisposeGlobal");
    if (!i::V8::IsRunning()) return;
    i::GlobalHandles::Destroy(obj);
  }
  
  // --- H a n d l e s ---
  
  
  HandleScope::HandleScope()
      : prev_next_(i::HandleScope::current_.next),
        prev_limit_(i::HandleScope::current_.limit),
        is_closed_(false) {
    API_ENTRY_CHECK("HandleScope::HandleScope");
    i::HandleScope::current_.level++;
  }
  
  
  HandleScope::~HandleScope() {
    if (!is_closed_) {
      Leave();
    }
  }
  
  
  void HandleScope::Leave() {
    i::HandleScope::current_.level--;
    ASSERT(i::HandleScope::current_.level >= 0);
    i::HandleScope::current_.next = prev_next_;
    if (i::HandleScope::current_.limit != prev_limit_) {
      i::HandleScope::current_.limit = prev_limit_;
      i::HandleScope::DeleteExtensions();
    }
  
  #ifdef DEBUG
    i::HandleScope::ZapRange(prev_next_, prev_limit_);
  #endif
  }
  
  
  int HandleScope::NumberOfHandles() {
    return i::HandleScope::NumberOfHandles();
  }
  
  
  i::Object** v8::HandleScope::CreateHandle(i::Object* value) {
    return i::HandleScope::CreateHandle(value);
  }
  
  
  void Context::Enter() {
    if (IsDeadCheck("v8::Context::Enter()")) return;
    ENTER_V8;
    i::Handle<i::Context> env = Utils::OpenHandle(this);
    thread_local.EnterContext(env);
  
    thread_local.SaveContext(i::Top::context());
    i::Top::set_context(*env);
  }
  
  
  void Context::Exit() {
    if (!i::V8::IsRunning()) return;
    if (!ApiCheck(thread_local.LeaveLastContext(),
                  "v8::Context::Exit()",
                  "Cannot exit non-entered context")) {
      return;
    }
  
    // Content of 'last_context' could be NULL.
    i::Context* last_context = thread_local.RestoreContext();
    i::Top::set_context(last_context);
  }
  
  
  void Context::SetData(v8::Handle<String> data) {
    if (IsDeadCheck("v8::Context::SetData()")) return;
    ENTER_V8;
    {
      HandleScope scope;
      i::Handle<i::Context> env = Utils::OpenHandle(this);
      i::Handle<i::Object> raw_data = Utils::OpenHandle(*data);
      ASSERT(env->IsGlobalContext());
      if (env->IsGlobalContext()) {
        env->set_data(*raw_data);
      }
    }
  }
  
  
  v8::Local<v8::Value> Context::GetData() {
    if (IsDeadCheck("v8::Context::GetData()")) return v8::Local<Value>();
    ENTER_V8;
    i::Object* raw_result = NULL;
    {
      HandleScope scope;
      i::Handle<i::Context> env = Utils::OpenHandle(this);
      ASSERT(env->IsGlobalContext());
      if (env->IsGlobalContext()) {
        raw_result = env->data();
      } else {
        return Local<Value>();
      }
    }
    i::Handle<i::Object> result(raw_result);
    return Utils::ToLocal(result);
  }
  
  
  i::Object** v8::HandleScope::RawClose(i::Object** value) {
    if (!ApiCheck(!is_closed_,
                  "v8::HandleScope::Close()",
                  "Local scope has already been closed")) {
      return 0;
    }
    LOG_API("CloseHandleScope");
  
    // Read the result before popping the handle block.
    i::Object* result = NULL;
    if (value != NULL) {
      result = *value;
    }
    is_closed_ = true;
    Leave();
  
    if (value == NULL) {
      return NULL;
    }
  
    // Allocate a new handle on the previous handle block.
    i::Handle<i::Object> handle(result);
    return handle.location();
  }
  
  
  // --- N e a n d e r ---
  
  
  // A constructor cannot easily return an error value, therefore it is necessary
  // to check for a dead VM with ON_BAILOUT before constructing any Neander
  // objects.  To remind you about this there is no HandleScope in the
  // NeanderObject constructor.  When you add one to the site calling the
  // constructor you should check that you ensured the VM was not dead first.
  NeanderObject::NeanderObject(int size) {
    EnsureInitialized("v8::Nowhere");
    ENTER_V8;
    value_ = i::Factory::NewNeanderObject();
    i::Handle<i::FixedArray> elements = i::Factory::NewFixedArray(size);
    value_->set_elements(*elements);
  }
  
  
  int NeanderObject::size() {
    return i::FixedArray::cast(value_->elements())->length();
  }
  
  
  NeanderArray::NeanderArray() : obj_(2) {
    obj_.set(0, i::Smi::FromInt(0));
  }
  
  
  int NeanderArray::length() {
    return i::Smi::cast(obj_.get(0))->value();
  }
  
  
  i::Object* NeanderArray::get(int offset) {
    ASSERT(0 <= offset);
    ASSERT(offset < length());
    return obj_.get(offset + 1);
  }
  
  
  // This method cannot easily return an error value, therefore it is necessary
  // to check for a dead VM with ON_BAILOUT before calling it.  To remind you
  // about this there is no HandleScope in this method.  When you add one to the
  // site calling this method you should check that you ensured the VM was not
  // dead first.
  void NeanderArray::add(i::Handle<i::Object> value) {
    int length = this->length();
    int size = obj_.size();
    if (length == size - 1) {
      i::Handle<i::FixedArray> new_elms = i::Factory::NewFixedArray(2 * size);
      for (int i = 0; i < length; i++)
        new_elms->set(i + 1, get(i));
      obj_.value()->set_elements(*new_elms);
    }
    obj_.set(length + 1, *value);
    obj_.set(0, i::Smi::FromInt(length + 1));
  }
  
  
  void NeanderArray::set(int index, i::Object* value) {
    if (index < 0 || index >= this->length()) return;
    obj_.set(index + 1, value);
  }
  
  
  // --- T e m p l a t e ---
  
  
  static void InitializeTemplate(i::Handle<i::TemplateInfo> that, int type) {
    that->set_tag(i::Smi::FromInt(type));
  }
  
  
  void Template::Set(v8::Handle<String> name, v8::Handle<Data> value,
                     v8::PropertyAttribute attribute) {
    if (IsDeadCheck("v8::Template::SetProperty()")) return;
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::Object> list(Utils::OpenHandle(this)->property_list());
    if (list->IsUndefined()) {
      list = NeanderArray().value();
      Utils::OpenHandle(this)->set_property_list(*list);
    }
    NeanderArray array(list);
    array.add(Utils::OpenHandle(*name));
    array.add(Utils::OpenHandle(*value));
    array.add(Utils::OpenHandle(*v8::Integer::New(attribute)));
  }
  
  
  // --- F u n c t i o n   T e m p l a t e ---
  static void InitializeFunctionTemplate(
        i::Handle<i::FunctionTemplateInfo> info) {
    info->set_tag(i::Smi::FromInt(Consts::FUNCTION_TEMPLATE));
    info->set_flag(0);
  }
  
  
  Local<ObjectTemplate> FunctionTemplate::PrototypeTemplate() {
    if (IsDeadCheck("v8::FunctionTemplate::PrototypeTemplate()")) {
      return Local<ObjectTemplate>();
    }
    ENTER_V8;
    i::Handle<i::Object> result(Utils::OpenHandle(this)->prototype_template());
    if (result->IsUndefined()) {
      result = Utils::OpenHandle(*ObjectTemplate::New());
      Utils::OpenHandle(this)->set_prototype_template(*result);
    }
    return Local<ObjectTemplate>(ToApi<ObjectTemplate>(result));
  }
  
  
  void FunctionTemplate::Inherit(v8::Handle<FunctionTemplate> value) {
    if (IsDeadCheck("v8::FunctionTemplate::Inherit()")) return;
    ENTER_V8;
    Utils::OpenHandle(this)->set_parent_template(*Utils::OpenHandle(*value));
  }
  
  
  // To distinguish the function templates, so that we can find them in the
  // function cache of the global context.
  static int next_serial_number = 0;
  
  
  Local<FunctionTemplate> FunctionTemplate::New(InvocationCallback callback,
      v8::Handle<Value> data, v8::Handle<Signature> signature) {
    EnsureInitialized("v8::FunctionTemplate::New()");
    LOG_API("FunctionTemplate::New");
    ENTER_V8;
    i::Handle<i::Struct> struct_obj =
        i::Factory::NewStruct(i::FUNCTION_TEMPLATE_INFO_TYPE);
    i::Handle<i::FunctionTemplateInfo> obj =
        i::Handle<i::FunctionTemplateInfo>::cast(struct_obj);
    InitializeFunctionTemplate(obj);
    obj->set_serial_number(i::Smi::FromInt(next_serial_number++));
    if (callback != 0) {
      if (data.IsEmpty()) data = v8::Undefined();
      Utils::ToLocal(obj)->SetCallHandler(callback, data);
    }
    obj->set_undetectable(false);
    obj->set_needs_access_check(false);
  
    if (!signature.IsEmpty())
      obj->set_signature(*Utils::OpenHandle(*signature));
    return Utils::ToLocal(obj);
  }
  
  
  Local<Signature> Signature::New(Handle<FunctionTemplate> receiver,
        int argc, Handle<FunctionTemplate> argv[]) {
    EnsureInitialized("v8::Signature::New()");
    LOG_API("Signature::New");
    ENTER_V8;
    i::Handle<i::Struct> struct_obj =
        i::Factory::NewStruct(i::SIGNATURE_INFO_TYPE);
    i::Handle<i::SignatureInfo> obj =
        i::Handle<i::SignatureInfo>::cast(struct_obj);
    if (!receiver.IsEmpty()) obj->set_receiver(*Utils::OpenHandle(*receiver));
    if (argc > 0) {
      i::Handle<i::FixedArray> args = i::Factory::NewFixedArray(argc);
      for (int i = 0; i < argc; i++) {
        if (!argv[i].IsEmpty())
          args->set(i, *Utils::OpenHandle(*argv[i]));
      }
      obj->set_args(*args);
    }
    return Utils::ToLocal(obj);
  }
  
  
  Local<TypeSwitch> TypeSwitch::New(Handle<FunctionTemplate> type) {
    Handle<FunctionTemplate> types[1] = { type };
    return TypeSwitch::New(1, types);
  }
  
  
  Local<TypeSwitch> TypeSwitch::New(int argc, Handle<FunctionTemplate> types[]) {
    EnsureInitialized("v8::TypeSwitch::New()");
    LOG_API("TypeSwitch::New");
    ENTER_V8;
    i::Handle<i::FixedArray> vector = i::Factory::NewFixedArray(argc);
    for (int i = 0; i < argc; i++)
      vector->set(i, *Utils::OpenHandle(*types[i]));
    i::Handle<i::Struct> struct_obj =
        i::Factory::NewStruct(i::TYPE_SWITCH_INFO_TYPE);
    i::Handle<i::TypeSwitchInfo> obj =
        i::Handle<i::TypeSwitchInfo>::cast(struct_obj);
    obj->set_types(*vector);
    return Utils::ToLocal(obj);
  }
  
  
  int TypeSwitch::match(v8::Handle<Value> value) {
    LOG_API("TypeSwitch::match");
    i::Handle<i::Object> obj = Utils::OpenHandle(*value);
    i::Handle<i::TypeSwitchInfo> info = Utils::OpenHandle(this);
    i::FixedArray* types = i::FixedArray::cast(info->types());
    for (int i = 0; i < types->length(); i++) {
      if (obj->IsInstanceOf(i::FunctionTemplateInfo::cast(types->get(i))))
        return i + 1;
    }
    return 0;
  }
  
  
  #define SET_FIELD_WRAPPED(obj, setter, cdata) do {  \
      i::Handle<i::Object> proxy = FromCData(cdata);  \
      (obj)->setter(*proxy);                          \
    } while (false)
  
  
  void FunctionTemplate::SetCallHandler(InvocationCallback callback,
                                        v8::Handle<Value> data) {
    if (IsDeadCheck("v8::FunctionTemplate::SetCallHandler()")) return;
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::Struct> struct_obj =
        i::Factory::NewStruct(i::CALL_HANDLER_INFO_TYPE);
    i::Handle<i::CallHandlerInfo> obj =
        i::Handle<i::CallHandlerInfo>::cast(struct_obj);
    SET_FIELD_WRAPPED(obj, set_callback, callback);
    if (data.IsEmpty()) data = v8::Undefined();
    obj->set_data(*Utils::OpenHandle(*data));
    Utils::OpenHandle(this)->set_call_code(*obj);
  }
  
  
  static i::Handle<i::AccessorInfo> MakeAccessorInfo(
        v8::Handle<String> name,
        AccessorGetter getter,
        AccessorSetter setter,
        v8::Handle<Value> data,
        v8::AccessControl settings,
        v8::PropertyAttribute attributes) {
    i::Handle<i::AccessorInfo> obj = i::Factory::NewAccessorInfo();
    ASSERT(getter != NULL);
    SET_FIELD_WRAPPED(obj, set_getter, getter);
    SET_FIELD_WRAPPED(obj, set_setter, setter);
    if (data.IsEmpty()) data = v8::Undefined();
    obj->set_data(*Utils::OpenHandle(*data));
    obj->set_name(*Utils::OpenHandle(*name));
    if (settings & ALL_CAN_READ) obj->set_all_can_read(true);
    if (settings & ALL_CAN_WRITE) obj->set_all_can_write(true);
    if (settings & PROHIBITS_OVERWRITING) obj->set_prohibits_overwriting(true);
    obj->set_property_attributes(static_cast<PropertyAttributes>(attributes));
    return obj;
  }
  
  
  void FunctionTemplate::AddInstancePropertyAccessor(
        v8::Handle<String> name,
        AccessorGetter getter,
        AccessorSetter setter,
        v8::Handle<Value> data,
        v8::AccessControl settings,
        v8::PropertyAttribute attributes) {
    if (IsDeadCheck("v8::FunctionTemplate::AddInstancePropertyAccessor()")) {
      return;
    }
    ENTER_V8;
    HandleScope scope;
  
    i::Handle<i::AccessorInfo> obj = MakeAccessorInfo(name,
                                                      getter, setter, data,
                                                      settings, attributes);
    i::Handle<i::Object> list(Utils::OpenHandle(this)->property_accessors());
    if (list->IsUndefined()) {
      list = NeanderArray().value();
      Utils::OpenHandle(this)->set_property_accessors(*list);
    }
    NeanderArray array(list);
    array.add(obj);
  }
  
  
  Local<ObjectTemplate> FunctionTemplate::InstanceTemplate() {
    if (IsDeadCheck("v8::FunctionTemplate::InstanceTemplate()")
        || EmptyCheck("v8::FunctionTemplate::InstanceTemplate()", this))
      return Local<ObjectTemplate>();
    ENTER_V8;
    if (Utils::OpenHandle(this)->instance_template()->IsUndefined()) {
      Local<ObjectTemplate> templ =
          ObjectTemplate::New(v8::Handle<FunctionTemplate>(this));
      Utils::OpenHandle(this)->set_instance_template(*Utils::OpenHandle(*templ));
    }
    i::Handle<i::ObjectTemplateInfo> result(i::ObjectTemplateInfo::cast(
          Utils::OpenHandle(this)->instance_template()));
    return Utils::ToLocal(result);
  }
  
  
  void FunctionTemplate::SetClassName(Handle<String> name) {
    if (IsDeadCheck("v8::FunctionTemplate::SetClassName()")) return;
    ENTER_V8;
    Utils::OpenHandle(this)->set_class_name(*Utils::OpenHandle(*name));
  }
  
  
  void FunctionTemplate::SetHiddenPrototype(bool value) {
    if (IsDeadCheck("v8::FunctionTemplate::SetHiddenPrototype()")) return;
    ENTER_V8;
    Utils::OpenHandle(this)->set_hidden_prototype(value);
  }
  
  
  void FunctionTemplate::SetNamedInstancePropertyHandler(
        NamedPropertyGetter getter,
        NamedPropertySetter setter,
        NamedPropertyQuery query,
        NamedPropertyDeleter remover,
        NamedPropertyEnumerator enumerator,
        Handle<Value> data) {
    if (IsDeadCheck("v8::FunctionTemplate::SetNamedInstancePropertyHandler()")) {
      return;
    }
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::Struct> struct_obj =
        i::Factory::NewStruct(i::INTERCEPTOR_INFO_TYPE);
    i::Handle<i::InterceptorInfo> obj =
        i::Handle<i::InterceptorInfo>::cast(struct_obj);
  
    if (getter != 0) SET_FIELD_WRAPPED(obj, set_getter, getter);
    if (setter != 0) SET_FIELD_WRAPPED(obj, set_setter, setter);
    if (query != 0) SET_FIELD_WRAPPED(obj, set_query, query);
    if (remover != 0) SET_FIELD_WRAPPED(obj, set_deleter, remover);
    if (enumerator != 0) SET_FIELD_WRAPPED(obj, set_enumerator, enumerator);
  
    if (data.IsEmpty()) data = v8::Undefined();
    obj->set_data(*Utils::OpenHandle(*data));
    Utils::OpenHandle(this)->set_named_property_handler(*obj);
  }
  
  
  void FunctionTemplate::SetIndexedInstancePropertyHandler(
        IndexedPropertyGetter getter,
        IndexedPropertySetter setter,
        IndexedPropertyQuery query,
        IndexedPropertyDeleter remover,
        IndexedPropertyEnumerator enumerator,
        Handle<Value> data) {
    if (IsDeadCheck(
          "v8::FunctionTemplate::SetIndexedInstancePropertyHandler()")) {
      return;
    }
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::Struct> struct_obj =
        i::Factory::NewStruct(i::INTERCEPTOR_INFO_TYPE);
    i::Handle<i::InterceptorInfo> obj =
        i::Handle<i::InterceptorInfo>::cast(struct_obj);
  
    if (getter != 0) SET_FIELD_WRAPPED(obj, set_getter, getter);
    if (setter != 0) SET_FIELD_WRAPPED(obj, set_setter, setter);
    if (query != 0) SET_FIELD_WRAPPED(obj, set_query, query);
    if (remover != 0) SET_FIELD_WRAPPED(obj, set_deleter, remover);
    if (enumerator != 0) SET_FIELD_WRAPPED(obj, set_enumerator, enumerator);
  
    if (data.IsEmpty()) data = v8::Undefined();
    obj->set_data(*Utils::OpenHandle(*data));
    Utils::OpenHandle(this)->set_indexed_property_handler(*obj);
  }
  
  
  void FunctionTemplate::SetInstanceCallAsFunctionHandler(
        InvocationCallback callback,
        Handle<Value> data) {
    if (IsDeadCheck("v8::FunctionTemplate::SetInstanceCallAsFunctionHandler()")) {
      return;
    }
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::Struct> struct_obj =
        i::Factory::NewStruct(i::CALL_HANDLER_INFO_TYPE);
    i::Handle<i::CallHandlerInfo> obj =
        i::Handle<i::CallHandlerInfo>::cast(struct_obj);
    SET_FIELD_WRAPPED(obj, set_callback, callback);
    if (data.IsEmpty()) data = v8::Undefined();
    obj->set_data(*Utils::OpenHandle(*data));
    Utils::OpenHandle(this)->set_instance_call_handler(*obj);
  }
  
  
  // --- O b j e c t T e m p l a t e ---
  
  
  Local<ObjectTemplate> ObjectTemplate::New() {
    return New(Local<FunctionTemplate>());
  }
  
  
  Local<ObjectTemplate> ObjectTemplate::New(
        v8::Handle<FunctionTemplate> constructor) {
    if (IsDeadCheck("v8::ObjectTemplate::New()")) return Local<ObjectTemplate>();
    EnsureInitialized("v8::ObjectTemplate::New()");
    LOG_API("ObjectTemplate::New");
    ENTER_V8;
    i::Handle<i::Struct> struct_obj =
        i::Factory::NewStruct(i::OBJECT_TEMPLATE_INFO_TYPE);
    i::Handle<i::ObjectTemplateInfo> obj =
        i::Handle<i::ObjectTemplateInfo>::cast(struct_obj);
    InitializeTemplate(obj, Consts::OBJECT_TEMPLATE);
    if (!constructor.IsEmpty())
      obj->set_constructor(*Utils::OpenHandle(*constructor));
    obj->set_internal_field_count(i::Smi::FromInt(0));
    return Utils::ToLocal(obj);
  }
  
  
  // Ensure that the object template has a constructor.  If no
  // constructor is available we create one.
  static void EnsureConstructor(ObjectTemplate* object_template) {
    if (Utils::OpenHandle(object_template)->constructor()->IsUndefined()) {
      Local<FunctionTemplate> templ = FunctionTemplate::New();
      i::Handle<i::FunctionTemplateInfo> constructor = Utils::OpenHandle(*templ);
      constructor->set_instance_template(*Utils::OpenHandle(object_template));
      Utils::OpenHandle(object_template)->set_constructor(*constructor);
    }
  }
  
  
  void ObjectTemplate::SetAccessor(v8::Handle<String> name,
                                   AccessorGetter getter,
                                   AccessorSetter setter,
                                   v8::Handle<Value> data,
                                   AccessControl settings,
                                   PropertyAttribute attribute) {
    if (IsDeadCheck("v8::ObjectTemplate::SetAccessor()")) return;
    ENTER_V8;
    HandleScope scope;
    EnsureConstructor(this);
    i::FunctionTemplateInfo* constructor =
        i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
    i::Handle<i::FunctionTemplateInfo> cons(constructor);
    Utils::ToLocal(cons)->AddInstancePropertyAccessor(name,
                                                      getter,
                                                      setter,
                                                      data,
                                                      settings,
                                                      attribute);
  }
  
  
  void ObjectTemplate::SetNamedPropertyHandler(NamedPropertyGetter getter,
                                               NamedPropertySetter setter,
                                               NamedPropertyQuery query,
                                               NamedPropertyDeleter remover,
                                               NamedPropertyEnumerator enumerator,
                                               Handle<Value> data) {
    if (IsDeadCheck("v8::ObjectTemplate::SetNamedPropertyHandler()")) return;
    ENTER_V8;
    HandleScope scope;
    EnsureConstructor(this);
    i::FunctionTemplateInfo* constructor =
        i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
    i::Handle<i::FunctionTemplateInfo> cons(constructor);
    Utils::ToLocal(cons)->SetNamedInstancePropertyHandler(getter,
                                                          setter,
                                                          query,
                                                          remover,
                                                          enumerator,
                                                          data);
  }
  
  
  void ObjectTemplate::MarkAsUndetectable() {
    if (IsDeadCheck("v8::ObjectTemplate::MarkAsUndetectable()")) return;
    ENTER_V8;
    HandleScope scope;
    EnsureConstructor(this);
    i::FunctionTemplateInfo* constructor =
        i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
    i::Handle<i::FunctionTemplateInfo> cons(constructor);
    cons->set_undetectable(true);
  }
  
  
  void ObjectTemplate::SetAccessCheckCallbacks(
        NamedSecurityCallback named_callback,
        IndexedSecurityCallback indexed_callback,
        Handle<Value> data,
        bool turned_on_by_default) {
    if (IsDeadCheck("v8::ObjectTemplate::SetAccessCheckCallbacks()")) return;
    ENTER_V8;
    HandleScope scope;
    EnsureConstructor(this);
  
    i::Handle<i::Struct> struct_info =
        i::Factory::NewStruct(i::ACCESS_CHECK_INFO_TYPE);
    i::Handle<i::AccessCheckInfo> info =
        i::Handle<i::AccessCheckInfo>::cast(struct_info);
  
    SET_FIELD_WRAPPED(info, set_named_callback, named_callback);
    SET_FIELD_WRAPPED(info, set_indexed_callback, indexed_callback);
  
    if (data.IsEmpty()) data = v8::Undefined();
    info->set_data(*Utils::OpenHandle(*data));
  
    i::FunctionTemplateInfo* constructor =
        i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
    i::Handle<i::FunctionTemplateInfo> cons(constructor);
    cons->set_access_check_info(*info);
    cons->set_needs_access_check(turned_on_by_default);
  }
  
  
  void ObjectTemplate::SetIndexedPropertyHandler(
        IndexedPropertyGetter getter,
        IndexedPropertySetter setter,
        IndexedPropertyQuery query,
        IndexedPropertyDeleter remover,
        IndexedPropertyEnumerator enumerator,
        Handle<Value> data) {
    if (IsDeadCheck("v8::ObjectTemplate::SetIndexedPropertyHandler()")) return;
    ENTER_V8;
    HandleScope scope;
    EnsureConstructor(this);
    i::FunctionTemplateInfo* constructor =
        i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
    i::Handle<i::FunctionTemplateInfo> cons(constructor);
    Utils::ToLocal(cons)->SetIndexedInstancePropertyHandler(getter,
                                                            setter,
                                                            query,
                                                            remover,
                                                            enumerator,
                                                            data);
  }
  
  
  void ObjectTemplate::SetCallAsFunctionHandler(InvocationCallback callback,
                                                Handle<Value> data) {
    if (IsDeadCheck("v8::ObjectTemplate::SetCallAsFunctionHandler()")) return;
    ENTER_V8;
    HandleScope scope;
    EnsureConstructor(this);
    i::FunctionTemplateInfo* constructor =
        i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
    i::Handle<i::FunctionTemplateInfo> cons(constructor);
    Utils::ToLocal(cons)->SetInstanceCallAsFunctionHandler(callback, data);
  }
  
  
  int ObjectTemplate::InternalFieldCount() {
    if (IsDeadCheck("v8::ObjectTemplate::InternalFieldCount()")) {
      return 0;
    }
    return i::Smi::cast(Utils::OpenHandle(this)->internal_field_count())->value();
  }
  
  
  void ObjectTemplate::SetInternalFieldCount(int value) {
    if (IsDeadCheck("v8::ObjectTemplate::SetInternalFieldCount()")) return;
    if (!ApiCheck(i::Smi::IsValid(value),
                  "v8::ObjectTemplate::SetInternalFieldCount()",
                  "Invalid internal field count")) {
      return;
    }
    ENTER_V8;
    if (value > 0) {
      // The internal field count is set by the constructor function's
      // construct code, so we ensure that there is a constructor
      // function to do the setting.
      EnsureConstructor(this);
    }
    Utils::OpenHandle(this)->set_internal_field_count(i::Smi::FromInt(value));
  }
  
  
  // --- S c r i p t D a t a ---
  
  
  ScriptData* ScriptData::PreCompile(const char* input, int length) {
    i::Utf8ToUC16CharacterStream stream(
        reinterpret_cast<const unsigned char*>(input), length);
    return i::ParserApi::PreParse(&stream, NULL);
  }
  
  
  ScriptData* ScriptData::PreCompile(v8::Handle<String> source) {
    i::Handle<i::String> str = Utils::OpenHandle(*source);
    if (str->IsExternalTwoByteString()) {
      i::ExternalTwoByteStringUC16CharacterStream stream(
        i::Handle<i::ExternalTwoByteString>::cast(str), 0, str->length());
      return i::ParserApi::PreParse(&stream, NULL);
    } else {
      i::GenericStringUC16CharacterStream stream(str, 0, str->length());
      return i::ParserApi::PreParse(&stream, NULL);
    }
  }
  
  
  ScriptData* ScriptData::New(const char* data, int length) {
    // Return an empty ScriptData if the length is obviously invalid.
    if (length % sizeof(unsigned) != 0) {
      return new i::ScriptDataImpl();
    }
  
    // Copy the data to ensure it is properly aligned.
    int deserialized_data_length = length / sizeof(unsigned);
    // If aligned, don't create a copy of the data.
    if (reinterpret_cast<intptr_t>(data) % sizeof(unsigned) == 0) {
      return new i::ScriptDataImpl(data, length);
    }
    // Copy the data to align it.
    unsigned* deserialized_data = i::NewArray<unsigned>(deserialized_data_length);
    i::MemCopy(deserialized_data, data, length);
  
    return new i::ScriptDataImpl(
        i::Vector<unsigned>(deserialized_data, deserialized_data_length));
  }
  
  
  // --- S c r i p t ---
  
  
  Local<Script> Script::New(v8::Handle<String> source,
                            v8::ScriptOrigin* origin,
                            v8::ScriptData* pre_data,
                            v8::Handle<String> script_data) {
    ON_BAILOUT("v8::Script::New()", return Local<Script>());
    LOG_API("Script::New");
    ENTER_V8;
    i::Handle<i::String> str = Utils::OpenHandle(*source);
    i::Handle<i::Object> name_obj;
    int line_offset = 0;
    int column_offset = 0;
    if (origin != NULL) {
      if (!origin->ResourceName().IsEmpty()) {
        name_obj = Utils::OpenHandle(*origin->ResourceName());
      }
      if (!origin->ResourceLineOffset().IsEmpty()) {
        line_offset = static_cast<int>(origin->ResourceLineOffset()->Value());
      }
      if (!origin->ResourceColumnOffset().IsEmpty()) {
        column_offset = static_cast<int>(origin->ResourceColumnOffset()->Value());
      }
    }
    EXCEPTION_PREAMBLE();
    i::ScriptDataImpl* pre_data_impl = static_cast<i::ScriptDataImpl*>(pre_data);
    // We assert that the pre-data is sane, even though we can actually
    // handle it if it turns out not to be in release mode.
    ASSERT(pre_data_impl == NULL || pre_data_impl->SanityCheck());
    // If the pre-data isn't sane we simply ignore it
    if (pre_data_impl != NULL && !pre_data_impl->SanityCheck()) {
      pre_data_impl = NULL;
    }
    i::Handle<i::SharedFunctionInfo> result =
        i::Compiler::Compile(str,
                             name_obj,
                             line_offset,
                             column_offset,
                             NULL,
                             pre_data_impl,
                             Utils::OpenHandle(*script_data),
                             i::NOT_NATIVES_CODE);
    has_pending_exception = result.is_null();
    EXCEPTION_BAILOUT_CHECK(Local<Script>());
    return Local<Script>(ToApi<Script>(result));
  }
  
  
  Local<Script> Script::New(v8::Handle<String> source,
                            v8::Handle<Value> file_name) {
    ScriptOrigin origin(file_name);
    return New(source, &origin);
  }
  
  
  Local<Script> Script::Compile(v8::Handle<String> source,
                                v8::ScriptOrigin* origin,
                                v8::ScriptData* pre_data,
                                v8::Handle<String> script_data) {
    ON_BAILOUT("v8::Script::Compile()", return Local<Script>());
    LOG_API("Script::Compile");
    ENTER_V8;
    Local<Script> generic = New(source, origin, pre_data, script_data);
    if (generic.IsEmpty())
      return generic;
    i::Handle<i::Object> obj = Utils::OpenHandle(*generic);
    i::Handle<i::SharedFunctionInfo> function =
        i::Handle<i::SharedFunctionInfo>(i::SharedFunctionInfo::cast(*obj));
    i::Handle<i::JSFunction> result =
        i::Factory::NewFunctionFromSharedFunctionInfo(function,
                                                      i::Top::global_context());
    return Local<Script>(ToApi<Script>(result));
  }
  
  
  Local<Script> Script::Compile(v8::Handle<String> source,
                                v8::Handle<Value> file_name,
                                v8::Handle<String> script_data) {
    ScriptOrigin origin(file_name);
    return Compile(source, &origin, 0, script_data);
  }
  
  
  Local<Value> Script::Run() {
    ON_BAILOUT("v8::Script::Run()", return Local<Value>());
    LOG_API("Script::Run");
    ENTER_V8;
    i::Object* raw_result = NULL;
    {
      HandleScope scope;
      i::Handle<i::Object> obj = Utils::OpenHandle(this);
      i::Handle<i::JSFunction> fun;
      if (obj->IsSharedFunctionInfo()) {
        i::Handle<i::SharedFunctionInfo>
            function_info(i::SharedFunctionInfo::cast(*obj));
        fun = i::Factory::NewFunctionFromSharedFunctionInfo(
            function_info, i::Top::global_context());
      } else {
        fun = i::Handle<i::JSFunction>(i::JSFunction::cast(*obj));
      }
      EXCEPTION_PREAMBLE();
      i::Handle<i::Object> receiver(i::Top::context()->global_proxy());
      i::Handle<i::Object> result =
          i::Execution::Call(fun, receiver, 0, NULL, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(Local<Value>());
      raw_result = *result;
    }
    i::Handle<i::Object> result(raw_result);
    return Utils::ToLocal(result);
  }
  
  
  static i::Handle<i::SharedFunctionInfo> OpenScript(Script* script) {
    i::Handle<i::Object> obj = Utils::OpenHandle(script);
    i::Handle<i::SharedFunctionInfo> result;
    if (obj->IsSharedFunctionInfo()) {
      result =
          i::Handle<i::SharedFunctionInfo>(i::SharedFunctionInfo::cast(*obj));
    } else {
      result =
          i::Handle<i::SharedFunctionInfo>(i::JSFunction::cast(*obj)->shared());
    }
    return result;
  }
  
  
  Local<Value> Script::Id() {
    ON_BAILOUT("v8::Script::Id()", return Local<Value>());
    LOG_API("Script::Id");
    i::Object* raw_id = NULL;
    {
      HandleScope scope;
      i::Handle<i::SharedFunctionInfo> function_info = OpenScript(this);
      i::Handle<i::Script> script(i::Script::cast(function_info->script()));
      i::Handle<i::Object> id(script->id());
      raw_id = *id;
    }
    i::Handle<i::Object> id(raw_id);
    return Utils::ToLocal(id);
  }
  
  
  void Script::SetData(v8::Handle<String> data) {
    ON_BAILOUT("v8::Script::SetData()", return);
    LOG_API("Script::SetData");
    {
      HandleScope scope;
      i::Handle<i::SharedFunctionInfo> function_info = OpenScript(this);
      i::Handle<i::Object> raw_data = Utils::OpenHandle(*data);
      i::Handle<i::Script> script(i::Script::cast(function_info->script()));
      script->set_data(*raw_data);
    }
  }
  
  
  // --- E x c e p t i o n s ---
  
  
  v8::TryCatch::TryCatch()
      : next_(i::Top::try_catch_handler_address()),
        exception_(i::Heap::the_hole_value()),
        message_(i::Smi::FromInt(0)),
        is_verbose_(false),
        can_continue_(true),
        capture_message_(true),
        rethrow_(false) {
    i::Top::RegisterTryCatchHandler(this);
  }
  
  
  v8::TryCatch::~TryCatch() {
    if (rethrow_) {
      v8::HandleScope scope;
      v8::Local<v8::Value> exc = v8::Local<v8::Value>::New(Exception());
      i::Top::UnregisterTryCatchHandler(this);
      v8::ThrowException(exc);
    } else {
      i::Top::UnregisterTryCatchHandler(this);
    }
  }
  
  
  bool v8::TryCatch::HasCaught() const {
    return !reinterpret_cast<i::Object*>(exception_)->IsTheHole();
  }
  
  
  bool v8::TryCatch::CanContinue() const {
    return can_continue_;
  }
  
  
  v8::Handle<v8::Value> v8::TryCatch::ReThrow() {
    if (!HasCaught()) return v8::Local<v8::Value>();
    rethrow_ = true;
    return v8::Undefined();
  }
  
  
  v8::Local<Value> v8::TryCatch::Exception() const {
    if (HasCaught()) {
      // Check for out of memory exception.
      i::Object* exception = reinterpret_cast<i::Object*>(exception_);
      return v8::Utils::ToLocal(i::Handle<i::Object>(exception));
    } else {
      return v8::Local<Value>();
    }
  }
  
  
  v8::Local<Value> v8::TryCatch::StackTrace() const {
    if (HasCaught()) {
      i::Object* raw_obj = reinterpret_cast<i::Object*>(exception_);
      if (!raw_obj->IsJSObject()) return v8::Local<Value>();
      v8::HandleScope scope;
      i::Handle<i::JSObject> obj(i::JSObject::cast(raw_obj));
      i::Handle<i::String> name = i::Factory::LookupAsciiSymbol("stack");
      if (!obj->HasProperty(*name))
        return v8::Local<Value>();
      return scope.Close(v8::Utils::ToLocal(i::GetProperty(obj, name)));
    } else {
      return v8::Local<Value>();
    }
  }
  
  
  v8::Local<v8::Message> v8::TryCatch::Message() const {
    if (HasCaught() && message_ != i::Smi::FromInt(0)) {
      i::Object* message = reinterpret_cast<i::Object*>(message_);
      return v8::Utils::MessageToLocal(i::Handle<i::Object>(message));
    } else {
      return v8::Local<v8::Message>();
    }
  }
  
  
  void v8::TryCatch::Reset() {
    exception_ = i::Heap::the_hole_value();
    message_ = i::Smi::FromInt(0);
  }
  
  
  void v8::TryCatch::SetVerbose(bool value) {
    is_verbose_ = value;
  }
  
  
  void v8::TryCatch::SetCaptureMessage(bool value) {
    capture_message_ = value;
  }
  
  
  // --- M e s s a g e ---
  
  
  Local<String> Message::Get() const {
    ON_BAILOUT("v8::Message::Get()", return Local<String>());
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::String> raw_result = i::MessageHandler::GetMessage(obj);
    Local<String> result = Utils::ToLocal(raw_result);
    return scope.Close(result);
  }
  
  
  v8::Handle<Value> Message::GetScriptResourceName() const {
    if (IsDeadCheck("v8::Message::GetScriptResourceName()")) {
      return Local<String>();
    }
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> obj =
        i::Handle<i::JSObject>::cast(Utils::OpenHandle(this));
    // Return this.script.name.
    i::Handle<i::JSValue> script =
        i::Handle<i::JSValue>::cast(GetProperty(obj, "script"));
    i::Handle<i::Object> resource_name(i::Script::cast(script->value())->name());
    return scope.Close(Utils::ToLocal(resource_name));
  }
  
  
  v8::Handle<Value> Message::GetScriptData() const {
    if (IsDeadCheck("v8::Message::GetScriptResourceData()")) {
      return Local<Value>();
    }
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> obj =
        i::Handle<i::JSObject>::cast(Utils::OpenHandle(this));
    // Return this.script.data.
    i::Handle<i::JSValue> script =
        i::Handle<i::JSValue>::cast(GetProperty(obj, "script"));
    i::Handle<i::Object> data(i::Script::cast(script->value())->data());
    return scope.Close(Utils::ToLocal(data));
  }
  
  
  v8::Handle<v8::StackTrace> Message::GetStackTrace() const {
    if (IsDeadCheck("v8::Message::GetStackTrace()")) {
      return Local<v8::StackTrace>();
    }
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> obj =
        i::Handle<i::JSObject>::cast(Utils::OpenHandle(this));
    i::Handle<i::Object> stackFramesObj = GetProperty(obj, "stackFrames");
    if (!stackFramesObj->IsJSArray()) return v8::Handle<v8::StackTrace>();
    i::Handle<i::JSArray> stackTrace =
        i::Handle<i::JSArray>::cast(stackFramesObj);
    return scope.Close(Utils::StackTraceToLocal(stackTrace));
  }
  
  
  static i::Handle<i::Object> CallV8HeapFunction(const char* name,
                                                 i::Handle<i::Object> recv,
                                                 int argc,
                                                 i::Object** argv[],
                                                 bool* has_pending_exception) {
    i::Handle<i::String> fmt_str = i::Factory::LookupAsciiSymbol(name);
    i::Object* object_fun =
        i::Top::builtins()->GetPropertyNoExceptionThrown(*fmt_str);
    i::Handle<i::JSFunction> fun =
        i::Handle<i::JSFunction>(i::JSFunction::cast(object_fun));
    i::Handle<i::Object> value =
        i::Execution::Call(fun, recv, argc, argv, has_pending_exception);
    return value;
  }
  
  
  static i::Handle<i::Object> CallV8HeapFunction(const char* name,
                                                 i::Handle<i::Object> data,
                                                 bool* has_pending_exception) {
    i::Object** argv[1] = { data.location() };
    return CallV8HeapFunction(name,
                              i::Top::builtins(),
                              1,
                              argv,
                              has_pending_exception);
  }
  
  
  int Message::GetLineNumber() const {
    ON_BAILOUT("v8::Message::GetLineNumber()", return kNoLineNumberInfo);
    ENTER_V8;
    HandleScope scope;
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> result = CallV8HeapFunction("GetLineNumber",
                                                     Utils::OpenHandle(this),
                                                     &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(0);
    return static_cast<int>(result->Number());
  }
  
  
  int Message::GetStartPosition() const {
    if (IsDeadCheck("v8::Message::GetStartPosition()")) return 0;
    ENTER_V8;
    HandleScope scope;
  
    i::Handle<i::JSObject> data_obj = Utils::OpenHandle(this);
    return static_cast<int>(GetProperty(data_obj, "startPos")->Number());
  }
  
  
  int Message::GetEndPosition() const {
    if (IsDeadCheck("v8::Message::GetEndPosition()")) return 0;
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> data_obj = Utils::OpenHandle(this);
    return static_cast<int>(GetProperty(data_obj, "endPos")->Number());
  }
  
  
  int Message::GetStartColumn() const {
    if (IsDeadCheck("v8::Message::GetStartColumn()")) return kNoColumnInfo;
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> data_obj = Utils::OpenHandle(this);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> start_col_obj = CallV8HeapFunction(
        "GetPositionInLine",
        data_obj,
        &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(0);
    return static_cast<int>(start_col_obj->Number());
  }
  
  
  int Message::GetEndColumn() const {
    if (IsDeadCheck("v8::Message::GetEndColumn()")) return kNoColumnInfo;
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> data_obj = Utils::OpenHandle(this);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> start_col_obj = CallV8HeapFunction(
        "GetPositionInLine",
        data_obj,
        &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(0);
    int start = static_cast<int>(GetProperty(data_obj, "startPos")->Number());
    int end = static_cast<int>(GetProperty(data_obj, "endPos")->Number());
    return static_cast<int>(start_col_obj->Number()) + (end - start);
  }
  
  
  Local<String> Message::GetSourceLine() const {
    ON_BAILOUT("v8::Message::GetSourceLine()", return Local<String>());
    ENTER_V8;
    HandleScope scope;
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> result = CallV8HeapFunction("GetSourceLine",
                                                     Utils::OpenHandle(this),
                                                     &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(Local<v8::String>());
    if (result->IsString()) {
      return scope.Close(Utils::ToLocal(i::Handle<i::String>::cast(result)));
    } else {
      return Local<String>();
    }
  }
  
  
  void Message::PrintCurrentStackTrace(FILE* out) {
    if (IsDeadCheck("v8::Message::PrintCurrentStackTrace()")) return;
    ENTER_V8;
    i::Top::PrintCurrentStackTrace(out);
  }
  
  
  // --- S t a c k T r a c e ---
  
  Local<StackFrame> StackTrace::GetFrame(uint32_t index) const {
    if (IsDeadCheck("v8::StackTrace::GetFrame()")) return Local<StackFrame>();
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSArray> self = Utils::OpenHandle(this);
    i::Object* raw_object = self->GetElementNoExceptionThrown(index);
    i::Handle<i::JSObject> obj(i::JSObject::cast(raw_object));
    return scope.Close(Utils::StackFrameToLocal(obj));
  }
  
  
  int StackTrace::GetFrameCount() const {
    if (IsDeadCheck("v8::StackTrace::GetFrameCount()")) return -1;
    ENTER_V8;
    return i::Smi::cast(Utils::OpenHandle(this)->length())->value();
  }
  
  
  Local<Array> StackTrace::AsArray() {
    if (IsDeadCheck("v8::StackTrace::AsArray()")) Local<Array>();
    ENTER_V8;
    return Utils::ToLocal(Utils::OpenHandle(this));
  }
  
  
  Local<StackTrace> StackTrace::CurrentStackTrace(int frame_limit,
      StackTraceOptions options) {
    if (IsDeadCheck("v8::StackTrace::CurrentStackTrace()")) Local<StackTrace>();
    ENTER_V8;
    i::Handle<i::JSArray> stackTrace =
        i::Top::CaptureCurrentStackTrace(frame_limit, options);
    return Utils::StackTraceToLocal(stackTrace);
  }
  
  
  // --- S t a c k F r a m e ---
  
  int StackFrame::GetLineNumber() const {
    if (IsDeadCheck("v8::StackFrame::GetLineNumber()")) {
      return Message::kNoLineNumberInfo;
    }
    ENTER_V8;
    i::HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> line = GetProperty(self, "lineNumber");
    if (!line->IsSmi()) {
      return Message::kNoLineNumberInfo;
    }
    return i::Smi::cast(*line)->value();
  }
  
  
  int StackFrame::GetColumn() const {
    if (IsDeadCheck("v8::StackFrame::GetColumn()")) {
      return Message::kNoColumnInfo;
    }
    ENTER_V8;
    i::HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> column = GetProperty(self, "column");
    if (!column->IsSmi()) {
      return Message::kNoColumnInfo;
    }
    return i::Smi::cast(*column)->value();
  }
  
  
  Local<String> StackFrame::GetScriptName() const {
    if (IsDeadCheck("v8::StackFrame::GetScriptName()")) return Local<String>();
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> name = GetProperty(self, "scriptName");
    if (!name->IsString()) {
      return Local<String>();
    }
    return scope.Close(Local<String>::Cast(Utils::ToLocal(name)));
  }
  
  
  Local<String> StackFrame::GetScriptNameOrSourceURL() const {
    if (IsDeadCheck("v8::StackFrame::GetScriptNameOrSourceURL()")) {
      return Local<String>();
    }
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> name = GetProperty(self, "scriptNameOrSourceURL");
    if (!name->IsString()) {
      return Local<String>();
    }
    return scope.Close(Local<String>::Cast(Utils::ToLocal(name)));
  }
  
  
  Local<String> StackFrame::GetFunctionName() const {
    if (IsDeadCheck("v8::StackFrame::GetFunctionName()")) return Local<String>();
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> name = GetProperty(self, "functionName");
    if (!name->IsString()) {
      return Local<String>();
    }
    return scope.Close(Local<String>::Cast(Utils::ToLocal(name)));
  }
  
  
  bool StackFrame::IsEval() const {
    if (IsDeadCheck("v8::StackFrame::IsEval()")) return false;
    ENTER_V8;
    i::HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> is_eval = GetProperty(self, "isEval");
    return is_eval->IsTrue();
  }
  
  
  bool StackFrame::IsConstructor() const {
    if (IsDeadCheck("v8::StackFrame::IsConstructor()")) return false;
    ENTER_V8;
    i::HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> is_constructor = GetProperty(self, "isConstructor");
    return is_constructor->IsTrue();
  }
  
  
  // --- D a t a ---
  
  bool Value::IsUndefined() const {
    if (IsDeadCheck("v8::Value::IsUndefined()")) return false;
    return Utils::OpenHandle(this)->IsUndefined();
  }
  
  
  bool Value::IsNull() const {
    if (IsDeadCheck("v8::Value::IsNull()")) return false;
    return Utils::OpenHandle(this)->IsNull();
  }
  
  
  bool Value::IsTrue() const {
    if (IsDeadCheck("v8::Value::IsTrue()")) return false;
    return Utils::OpenHandle(this)->IsTrue();
  }
  
  
  bool Value::IsFalse() const {
    if (IsDeadCheck("v8::Value::IsFalse()")) return false;
    return Utils::OpenHandle(this)->IsFalse();
  }
  
  
  bool Value::IsFunction() const {
    if (IsDeadCheck("v8::Value::IsFunction()")) return false;
    return Utils::OpenHandle(this)->IsJSFunction();
  }
  
  
  bool Value::FullIsString() const {
    if (IsDeadCheck("v8::Value::IsString()")) return false;
    bool result = Utils::OpenHandle(this)->IsString();
    ASSERT_EQ(result, QuickIsString());
    return result;
  }
  
  
  bool Value::IsArray() const {
    if (IsDeadCheck("v8::Value::IsArray()")) return false;
    return Utils::OpenHandle(this)->IsJSArray();
  }
  
  
  bool Value::IsObject() const {
    if (IsDeadCheck("v8::Value::IsObject()")) return false;
    return Utils::OpenHandle(this)->IsJSObject();
  }
  
  
  bool Value::IsNumber() const {
    if (IsDeadCheck("v8::Value::IsNumber()")) return false;
    return Utils::OpenHandle(this)->IsNumber();
  }
  
  
  bool Value::IsBoolean() const {
    if (IsDeadCheck("v8::Value::IsBoolean()")) return false;
    return Utils::OpenHandle(this)->IsBoolean();
  }
  
  
  bool Value::IsExternal() const {
    if (IsDeadCheck("v8::Value::IsExternal()")) return false;
    return Utils::OpenHandle(this)->IsProxy();
  }
  
  
  bool Value::IsInt32() const {
    if (IsDeadCheck("v8::Value::IsInt32()")) return false;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    if (obj->IsSmi()) return true;
    if (obj->IsNumber()) {
      double value = obj->Number();
      return i::FastI2D(i::FastD2I(value)) == value;
    }
    return false;
  }
  
  
  bool Value::IsUint32() const {
    if (IsDeadCheck("v8::Value::IsUint32()")) return false;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    if (obj->IsSmi()) return i::Smi::cast(*obj)->value() >= 0;
    if (obj->IsNumber()) {
      double value = obj->Number();
      return i::FastUI2D(i::FastD2UI(value)) == value;
    }
    return false;
  }
  
  
  bool Value::IsDate() const {
    if (IsDeadCheck("v8::Value::IsDate()")) return false;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    return obj->HasSpecificClassOf(i::Heap::Date_symbol());
  }
  
  
  bool Value::IsRegExp() const {
    if (IsDeadCheck("v8::Value::IsRegExp()")) return false;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    return obj->IsJSRegExp();
  }
  
  
  Local<String> Value::ToString() const {
    if (IsDeadCheck("v8::Value::ToString()")) return Local<String>();
    LOG_API("ToString");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> str;
    if (obj->IsString()) {
      str = obj;
    } else {
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      str = i::Execution::ToString(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(Local<String>());
    }
    return Local<String>(ToApi<String>(str));
  }
  
  
  Local<String> Value::ToDetailString() const {
    if (IsDeadCheck("v8::Value::ToDetailString()")) return Local<String>();
    LOG_API("ToDetailString");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> str;
    if (obj->IsString()) {
      str = obj;
    } else {
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      str = i::Execution::ToDetailString(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(Local<String>());
    }
    return Local<String>(ToApi<String>(str));
  }
  
  
  Local<v8::Object> Value::ToObject() const {
    if (IsDeadCheck("v8::Value::ToObject()")) return Local<v8::Object>();
    LOG_API("ToObject");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> val;
    if (obj->IsJSObject()) {
      val = obj;
    } else {
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      val = i::Execution::ToObject(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(Local<v8::Object>());
    }
    return Local<v8::Object>(ToApi<Object>(val));
  }
  
  
  Local<Boolean> Value::ToBoolean() const {
    if (IsDeadCheck("v8::Value::ToBoolean()")) return Local<Boolean>();
    LOG_API("ToBoolean");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    if (obj->IsBoolean()) {
      return Local<Boolean>(ToApi<Boolean>(obj));
    } else {
      ENTER_V8;
      i::Handle<i::Object> val = i::Execution::ToBoolean(obj);
      return Local<Boolean>(ToApi<Boolean>(val));
    }
  }
  
  
  Local<Number> Value::ToNumber() const {
    if (IsDeadCheck("v8::Value::ToNumber()")) return Local<Number>();
    LOG_API("ToNumber");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> num;
    if (obj->IsNumber()) {
      num = obj;
    } else {
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      num = i::Execution::ToNumber(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(Local<Number>());
    }
    return Local<Number>(ToApi<Number>(num));
  }
  
  
  Local<Integer> Value::ToInteger() const {
    if (IsDeadCheck("v8::Value::ToInteger()")) return Local<Integer>();
    LOG_API("ToInteger");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> num;
    if (obj->IsSmi()) {
      num = obj;
    } else {
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      num = i::Execution::ToInteger(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(Local<Integer>());
    }
    return Local<Integer>(ToApi<Integer>(num));
  }
  
  
  void External::CheckCast(v8::Value* that) {
    if (IsDeadCheck("v8::External::Cast()")) return;
    i::Handle<i::Object> obj = Utils::OpenHandle(that);
    ApiCheck(obj->IsProxy(),
             "v8::External::Cast()",
             "Could not convert to external");
  }
  
  
  void v8::Object::CheckCast(Value* that) {
    if (IsDeadCheck("v8::Object::Cast()")) return;
    i::Handle<i::Object> obj = Utils::OpenHandle(that);
    ApiCheck(obj->IsJSObject(),
             "v8::Object::Cast()",
             "Could not convert to object");
  }
  
  
  void v8::Function::CheckCast(Value* that) {
    if (IsDeadCheck("v8::Function::Cast()")) return;
    i::Handle<i::Object> obj = Utils::OpenHandle(that);
    ApiCheck(obj->IsJSFunction(),
             "v8::Function::Cast()",
             "Could not convert to function");
  }
  
  
  void v8::String::CheckCast(v8::Value* that) {
    if (IsDeadCheck("v8::String::Cast()")) return;
    i::Handle<i::Object> obj = Utils::OpenHandle(that);
    ApiCheck(obj->IsString(),
             "v8::String::Cast()",
             "Could not convert to string");
  }
  
  
  void v8::Number::CheckCast(v8::Value* that) {
    if (IsDeadCheck("v8::Number::Cast()")) return;
    i::Handle<i::Object> obj = Utils::OpenHandle(that);
    ApiCheck(obj->IsNumber(),
             "v8::Number::Cast()",
             "Could not convert to number");
  }
  
  
  void v8::Integer::CheckCast(v8::Value* that) {
    if (IsDeadCheck("v8::Integer::Cast()")) return;
    i::Handle<i::Object> obj = Utils::OpenHandle(that);
    ApiCheck(obj->IsNumber(),
             "v8::Integer::Cast()",
             "Could not convert to number");
  }
  
  
  void v8::Array::CheckCast(Value* that) {
    if (IsDeadCheck("v8::Array::Cast()")) return;
    i::Handle<i::Object> obj = Utils::OpenHandle(that);
    ApiCheck(obj->IsJSArray(),
             "v8::Array::Cast()",
             "Could not convert to array");
  }
  
  
  void v8::Date::CheckCast(v8::Value* that) {
    if (IsDeadCheck("v8::Date::Cast()")) return;
    i::Handle<i::Object> obj = Utils::OpenHandle(that);
    ApiCheck(obj->HasSpecificClassOf(i::Heap::Date_symbol()),
             "v8::Date::Cast()",
             "Could not convert to date");
  }
  
  
  void v8::RegExp::CheckCast(v8::Value* that) {
    if (IsDeadCheck("v8::RegExp::Cast()")) return;
    i::Handle<i::Object> obj = Utils::OpenHandle(that);
    ApiCheck(obj->IsJSRegExp(),
             "v8::RegExp::Cast()",
             "Could not convert to regular expression");
  }
  
  
  bool Value::BooleanValue() const {
    if (IsDeadCheck("v8::Value::BooleanValue()")) return false;
    LOG_API("BooleanValue");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    if (obj->IsBoolean()) {
      return obj->IsTrue();
    } else {
      ENTER_V8;
      i::Handle<i::Object> value = i::Execution::ToBoolean(obj);
      return value->IsTrue();
    }
  }
  
  
  double Value::NumberValue() const {
    if (IsDeadCheck("v8::Value::NumberValue()")) return i::OS::nan_value();
    LOG_API("NumberValue");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> num;
    if (obj->IsNumber()) {
      num = obj;
    } else {
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      num = i::Execution::ToNumber(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(i::OS::nan_value());
    }
    return num->Number();
  }
  
  
  int64_t Value::IntegerValue() const {
    if (IsDeadCheck("v8::Value::IntegerValue()")) return 0;
    LOG_API("IntegerValue");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> num;
    if (obj->IsNumber()) {
      num = obj;
    } else {
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      num = i::Execution::ToInteger(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(0);
    }
    if (num->IsSmi()) {
      return i::Smi::cast(*num)->value();
    } else {
      return static_cast<int64_t>(num->Number());
    }
  }
  
  
  Local<Int32> Value::ToInt32() const {
    if (IsDeadCheck("v8::Value::ToInt32()")) return Local<Int32>();
    LOG_API("ToInt32");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> num;
    if (obj->IsSmi()) {
      num = obj;
    } else {
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      num = i::Execution::ToInt32(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(Local<Int32>());
    }
    return Local<Int32>(ToApi<Int32>(num));
  }
  
  
  Local<Uint32> Value::ToUint32() const {
    if (IsDeadCheck("v8::Value::ToUint32()")) return Local<Uint32>();
    LOG_API("ToUInt32");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> num;
    if (obj->IsSmi()) {
      num = obj;
    } else {
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      num = i::Execution::ToUint32(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(Local<Uint32>());
    }
    return Local<Uint32>(ToApi<Uint32>(num));
  }
  
  
  Local<Uint32> Value::ToArrayIndex() const {
    if (IsDeadCheck("v8::Value::ToArrayIndex()")) return Local<Uint32>();
    LOG_API("ToArrayIndex");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    if (obj->IsSmi()) {
      if (i::Smi::cast(*obj)->value() >= 0) return Utils::Uint32ToLocal(obj);
      return Local<Uint32>();
    }
    ENTER_V8;
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> string_obj =
        i::Execution::ToString(obj, &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(Local<Uint32>());
    i::Handle<i::String> str = i::Handle<i::String>::cast(string_obj);
    uint32_t index;
    if (str->AsArrayIndex(&index)) {
      i::Handle<i::Object> value;
      if (index <= static_cast<uint32_t>(i::Smi::kMaxValue)) {
        value = i::Handle<i::Object>(i::Smi::FromInt(index));
      } else {
        value = i::Factory::NewNumber(index);
      }
      return Utils::Uint32ToLocal(value);
    }
    return Local<Uint32>();
  }
  
  
  int32_t Value::Int32Value() const {
    if (IsDeadCheck("v8::Value::Int32Value()")) return 0;
    LOG_API("Int32Value");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    if (obj->IsSmi()) {
      return i::Smi::cast(*obj)->value();
    } else {
      LOG_API("Int32Value (slow)");
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      i::Handle<i::Object> num =
          i::Execution::ToInt32(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(0);
      if (num->IsSmi()) {
        return i::Smi::cast(*num)->value();
      } else {
        return static_cast<int32_t>(num->Number());
      }
    }
  }
  
  
  bool Value::Equals(Handle<Value> that) const {
    if (IsDeadCheck("v8::Value::Equals()")
        || EmptyCheck("v8::Value::Equals()", this)
        || EmptyCheck("v8::Value::Equals()", that)) {
      return false;
    }
    LOG_API("Equals");
    ENTER_V8;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> other = Utils::OpenHandle(*that);
    i::Object** args[1] = { other.location() };
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> result =
        CallV8HeapFunction("EQUALS", obj, 1, args, &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(false);
    return *result == i::Smi::FromInt(i::EQUAL);
  }
  
  
  bool Value::StrictEquals(Handle<Value> that) const {
    if (IsDeadCheck("v8::Value::StrictEquals()")
        || EmptyCheck("v8::Value::StrictEquals()", this)
        || EmptyCheck("v8::Value::StrictEquals()", that)) {
      return false;
    }
    LOG_API("StrictEquals");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::Object> other = Utils::OpenHandle(*that);
    // Must check HeapNumber first, since NaN !== NaN.
    if (obj->IsHeapNumber()) {
      if (!other->IsNumber()) return false;
      double x = obj->Number();
      double y = other->Number();
      // Must check explicitly for NaN:s on Windows, but -0 works fine.
      return x == y && !isnan(x) && !isnan(y);
    } else if (*obj == *other) {  // Also covers Booleans.
      return true;
    } else if (obj->IsSmi()) {
      return other->IsNumber() && obj->Number() == other->Number();
    } else if (obj->IsString()) {
      return other->IsString() &&
        i::String::cast(*obj)->Equals(i::String::cast(*other));
    } else if (obj->IsUndefined() || obj->IsUndetectableObject()) {
      return other->IsUndefined() || other->IsUndetectableObject();
    } else {
      return false;
    }
  }
  
  
  uint32_t Value::Uint32Value() const {
    if (IsDeadCheck("v8::Value::Uint32Value()")) return 0;
    LOG_API("Uint32Value");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    if (obj->IsSmi()) {
      return i::Smi::cast(*obj)->value();
    } else {
      ENTER_V8;
      EXCEPTION_PREAMBLE();
      i::Handle<i::Object> num =
          i::Execution::ToUint32(obj, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(0);
      if (num->IsSmi()) {
        return i::Smi::cast(*num)->value();
      } else {
        return static_cast<uint32_t>(num->Number());
      }
    }
  }
  
  
  bool v8::Object::Set(v8::Handle<Value> key, v8::Handle<Value> value,
                       v8::PropertyAttribute attribs) {
    ON_BAILOUT("v8::Object::Set()", return false);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::Object> self = Utils::OpenHandle(this);
    i::Handle<i::Object> key_obj = Utils::OpenHandle(*key);
    i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> obj = i::SetProperty(
        self,
        key_obj,
        value_obj,
        static_cast<PropertyAttributes>(attribs));
    has_pending_exception = obj.is_null();
    EXCEPTION_BAILOUT_CHECK(false);
    return true;
  }
  
  
  bool v8::Object::Set(uint32_t index, v8::Handle<Value> value) {
    ON_BAILOUT("v8::Object::Set()", return false);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> obj = i::SetElement(
        self,
        index,
        value_obj);
    has_pending_exception = obj.is_null();
    EXCEPTION_BAILOUT_CHECK(false);
    return true;
  }
  
  
  bool v8::Object::ForceSet(v8::Handle<Value> key,
                            v8::Handle<Value> value,
                            v8::PropertyAttribute attribs) {
    ON_BAILOUT("v8::Object::ForceSet()", return false);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> key_obj = Utils::OpenHandle(*key);
    i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> obj = i::ForceSetProperty(
        self,
        key_obj,
        value_obj,
        static_cast<PropertyAttributes>(attribs));
    has_pending_exception = obj.is_null();
    EXCEPTION_BAILOUT_CHECK(false);
    return true;
  }
  
  
  bool v8::Object::ForceDelete(v8::Handle<Value> key) {
    ON_BAILOUT("v8::Object::ForceDelete()", return false);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> key_obj = Utils::OpenHandle(*key);
  
    // When turning on access checks for a global object deoptimize all functions
    // as optimized code does not always handle access checks.
    i::Deoptimizer::DeoptimizeGlobalObject(*self);
  
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> obj = i::ForceDeleteProperty(self, key_obj);
    has_pending_exception = obj.is_null();
    EXCEPTION_BAILOUT_CHECK(false);
    return obj->IsTrue();
  }
  
  
  Local<Value> v8::Object::Get(v8::Handle<Value> key) {
    ON_BAILOUT("v8::Object::Get()", return Local<v8::Value>());
    ENTER_V8;
    i::Handle<i::Object> self = Utils::OpenHandle(this);
    i::Handle<i::Object> key_obj = Utils::OpenHandle(*key);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> result = i::GetProperty(self, key_obj);
    has_pending_exception = result.is_null();
    EXCEPTION_BAILOUT_CHECK(Local<Value>());
    return Utils::ToLocal(result);
  }
  
  
  Local<Value> v8::Object::Get(uint32_t index) {
    ON_BAILOUT("v8::Object::Get()", return Local<v8::Value>());
    ENTER_V8;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> result = i::GetElement(self, index);
    has_pending_exception = result.is_null();
    EXCEPTION_BAILOUT_CHECK(Local<Value>());
    return Utils::ToLocal(result);
  }
  
  
  Local<Value> v8::Object::GetPrototype() {
    ON_BAILOUT("v8::Object::GetPrototype()", return Local<v8::Value>());
    ENTER_V8;
    i::Handle<i::Object> self = Utils::OpenHandle(this);
    i::Handle<i::Object> result = i::GetPrototype(self);
    return Utils::ToLocal(result);
  }
  
  
  bool v8::Object::SetPrototype(Handle<Value> value) {
    ON_BAILOUT("v8::Object::SetPrototype()", return false);
    ENTER_V8;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> result = i::SetPrototype(self, value_obj);
    has_pending_exception = result.is_null();
    EXCEPTION_BAILOUT_CHECK(false);
    return true;
  }
  
  
  Local<Object> v8::Object::FindInstanceInPrototypeChain(
      v8::Handle<FunctionTemplate> tmpl) {
    ON_BAILOUT("v8::Object::FindInstanceInPrototypeChain()",
               return Local<v8::Object>());
    ENTER_V8;
    i::JSObject* object = *Utils::OpenHandle(this);
    i::FunctionTemplateInfo* tmpl_info = *Utils::OpenHandle(*tmpl);
    while (!object->IsInstanceOf(tmpl_info)) {
      i::Object* prototype = object->GetPrototype();
      if (!prototype->IsJSObject()) return Local<Object>();
      object = i::JSObject::cast(prototype);
    }
    return Utils::ToLocal(i::Handle<i::JSObject>(object));
  }
  
  
  Local<Array> v8::Object::GetPropertyNames() {
    ON_BAILOUT("v8::Object::GetPropertyNames()", return Local<v8::Array>());
    ENTER_V8;
    v8::HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::FixedArray> value =
        i::GetKeysInFixedArrayFor(self, i::INCLUDE_PROTOS);
    // Because we use caching to speed up enumeration it is important
    // to never change the result of the basic enumeration function so
    // we clone the result.
    i::Handle<i::FixedArray> elms = i::Factory::CopyFixedArray(value);
    i::Handle<i::JSArray> result = i::Factory::NewJSArrayWithElements(elms);
    return scope.Close(Utils::ToLocal(result));
  }
  
  
  Local<String> v8::Object::ObjectProtoToString() {
    ON_BAILOUT("v8::Object::ObjectProtoToString()", return Local<v8::String>());
    ENTER_V8;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
  
    i::Handle<i::Object> name(self->class_name());
  
    // Native implementation of Object.prototype.toString (v8natives.js):
    //   var c = %ClassOf(this);
    //   if (c === 'Arguments') c  = 'Object';
    //   return "[object " + c + "]";
  
    if (!name->IsString()) {
      return v8::String::New("[object ]");
  
    } else {
      i::Handle<i::String> class_name = i::Handle<i::String>::cast(name);
      if (class_name->IsEqualTo(i::CStrVector("Arguments"))) {
        return v8::String::New("[object Object]");
  
      } else {
        const char* prefix = "[object ";
        Local<String> str = Utils::ToLocal(class_name);
        const char* postfix = "]";
  
        int prefix_len = i::StrLength(prefix);
        int str_len = str->Length();
        int postfix_len = i::StrLength(postfix);
  
        int buf_len = prefix_len + str_len + postfix_len;
        i::ScopedVector<char> buf(buf_len);
  
        // Write prefix.
        char* ptr = buf.start();
        memcpy(ptr, prefix, prefix_len * v8::internal::kCharSize);
        ptr += prefix_len;
  
        // Write real content.
        str->WriteAscii(ptr, 0, str_len);
        ptr += str_len;
  
        // Write postfix.
        memcpy(ptr, postfix, postfix_len * v8::internal::kCharSize);
  
        // Copy the buffer into a heap-allocated string and return it.
        Local<String> result = v8::String::New(buf.start(), buf_len);
        return result;
      }
    }
  }
  
  
  Local<String> v8::Object::GetConstructorName() {
    ON_BAILOUT("v8::Object::GetConstructorName()", return Local<v8::String>());
    ENTER_V8;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::String> name(self->constructor_name());
    return Utils::ToLocal(name);
  }
  
  
  bool v8::Object::Delete(v8::Handle<String> key) {
    ON_BAILOUT("v8::Object::Delete()", return false);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
    return i::DeleteProperty(self, key_obj)->IsTrue();
  }
  
  
  bool v8::Object::Has(v8::Handle<String> key) {
    ON_BAILOUT("v8::Object::Has()", return false);
    ENTER_V8;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
    return self->HasProperty(*key_obj);
  }
  
  
  bool v8::Object::Delete(uint32_t index) {
    ON_BAILOUT("v8::Object::DeleteProperty()", return false);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    return i::DeleteElement(self, index)->IsTrue();
  }
  
  
  bool v8::Object::Has(uint32_t index) {
    ON_BAILOUT("v8::Object::HasProperty()", return false);
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    return self->HasElement(index);
  }
  
  
  bool Object::SetAccessor(Handle<String> name,
                           AccessorGetter getter,
                           AccessorSetter setter,
                           v8::Handle<Value> data,
                           AccessControl settings,
                           PropertyAttribute attributes) {
    ON_BAILOUT("v8::Object::SetAccessor()", return false);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::AccessorInfo> info = MakeAccessorInfo(name,
                                                       getter, setter, data,
                                                       settings, attributes);
    i::Handle<i::Object> result = i::SetAccessor(Utils::OpenHandle(this), info);
    return !result.is_null() && !result->IsUndefined();
  }
  
  
  bool v8::Object::HasRealNamedProperty(Handle<String> key) {
    ON_BAILOUT("v8::Object::HasRealNamedProperty()", return false);
    return Utils::OpenHandle(this)->HasRealNamedProperty(
        *Utils::OpenHandle(*key));
  }
  
  
  bool v8::Object::HasRealIndexedProperty(uint32_t index) {
    ON_BAILOUT("v8::Object::HasRealIndexedProperty()", return false);
    return Utils::OpenHandle(this)->HasRealElementProperty(index);
  }
  
  
  bool v8::Object::HasRealNamedCallbackProperty(Handle<String> key) {
    ON_BAILOUT("v8::Object::HasRealNamedCallbackProperty()", return false);
    ENTER_V8;
    return Utils::OpenHandle(this)->HasRealNamedCallbackProperty(
        *Utils::OpenHandle(*key));
  }
  
  
  bool v8::Object::HasNamedLookupInterceptor() {
    ON_BAILOUT("v8::Object::HasNamedLookupInterceptor()", return false);
    return Utils::OpenHandle(this)->HasNamedInterceptor();
  }
  
  
  bool v8::Object::HasIndexedLookupInterceptor() {
    ON_BAILOUT("v8::Object::HasIndexedLookupInterceptor()", return false);
    return Utils::OpenHandle(this)->HasIndexedInterceptor();
  }
  
  
  Local<Value> v8::Object::GetRealNamedPropertyInPrototypeChain(
        Handle<String> key) {
    ON_BAILOUT("v8::Object::GetRealNamedPropertyInPrototypeChain()",
               return Local<Value>());
    ENTER_V8;
    i::Handle<i::JSObject> self_obj = Utils::OpenHandle(this);
    i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
    i::LookupResult lookup;
    self_obj->LookupRealNamedPropertyInPrototypes(*key_obj, &lookup);
    if (lookup.IsProperty()) {
      PropertyAttributes attributes;
      i::Object* property =
          self_obj->GetProperty(*self_obj,
                                &lookup,
                                *key_obj,
                                &attributes)->ToObjectUnchecked();
      i::Handle<i::Object> result(property);
      return Utils::ToLocal(result);
    }
    return Local<Value>();  // No real property was found in prototype chain.
  }
  
  
  Local<Value> v8::Object::GetRealNamedProperty(Handle<String> key) {
    ON_BAILOUT("v8::Object::GetRealNamedProperty()", return Local<Value>());
    ENTER_V8;
    i::Handle<i::JSObject> self_obj = Utils::OpenHandle(this);
    i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
    i::LookupResult lookup;
    self_obj->LookupRealNamedProperty(*key_obj, &lookup);
    if (lookup.IsProperty()) {
      PropertyAttributes attributes;
      i::Object* property =
          self_obj->GetProperty(*self_obj,
                                &lookup,
                                *key_obj,
                                &attributes)->ToObjectUnchecked();
      i::Handle<i::Object> result(property);
      return Utils::ToLocal(result);
    }
    return Local<Value>();  // No real property was found in prototype chain.
  }
  
  
  // Turns on access checks by copying the map and setting the check flag.
  // Because the object gets a new map, existing inline cache caching
  // the old map of this object will fail.
  void v8::Object::TurnOnAccessCheck() {
    ON_BAILOUT("v8::Object::TurnOnAccessCheck()", return);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
  
    // When turning on access checks for a global object deoptimize all functions
    // as optimized code does not always handle access checks.
    i::Deoptimizer::DeoptimizeGlobalObject(*obj);
  
    i::Handle<i::Map> new_map =
      i::Factory::CopyMapDropTransitions(i::Handle<i::Map>(obj->map()));
    new_map->set_is_access_check_needed(true);
    obj->set_map(*new_map);
  }
  
  
  bool v8::Object::IsDirty() {
    return Utils::OpenHandle(this)->IsDirty();
  }
  
  
  Local<v8::Object> v8::Object::Clone() {
    ON_BAILOUT("v8::Object::Clone()", return Local<Object>());
    ENTER_V8;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    EXCEPTION_PREAMBLE();
    i::Handle<i::JSObject> result = i::Copy(self);
    has_pending_exception = result.is_null();
    EXCEPTION_BAILOUT_CHECK(Local<Object>());
    return Utils::ToLocal(result);
  }
  
  
  int v8::Object::GetIdentityHash() {
    ON_BAILOUT("v8::Object::GetIdentityHash()", return 0);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> hidden_props(i::GetHiddenProperties(self, true));
    i::Handle<i::Object> hash_symbol = i::Factory::identity_hash_symbol();
    i::Handle<i::Object> hash = i::GetProperty(hidden_props, hash_symbol);
    int hash_value;
    if (hash->IsSmi()) {
      hash_value = i::Smi::cast(*hash)->value();
    } else {
      int attempts = 0;
      do {
        // Generate a random 32-bit hash value but limit range to fit
        // within a smi.
        hash_value = i::V8::Random() & i::Smi::kMaxValue;
        attempts++;
      } while (hash_value == 0 && attempts < 30);
      hash_value = hash_value != 0 ? hash_value : 1;  // never return 0
      i::SetProperty(hidden_props,
                     hash_symbol,
                     i::Handle<i::Object>(i::Smi::FromInt(hash_value)),
                     static_cast<PropertyAttributes>(None));
    }
    return hash_value;
  }
  
  
  bool v8::Object::SetHiddenValue(v8::Handle<v8::String> key,
                                  v8::Handle<v8::Value> value) {
    ON_BAILOUT("v8::Object::SetHiddenValue()", return false);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> hidden_props(i::GetHiddenProperties(self, true));
    i::Handle<i::Object> key_obj = Utils::OpenHandle(*key);
    i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> obj = i::SetProperty(
        hidden_props,
        key_obj,
        value_obj,
        static_cast<PropertyAttributes>(None));
    has_pending_exception = obj.is_null();
    EXCEPTION_BAILOUT_CHECK(false);
    return true;
  }
  
  
  v8::Local<v8::Value> v8::Object::GetHiddenValue(v8::Handle<v8::String> key) {
    ON_BAILOUT("v8::Object::GetHiddenValue()", return Local<v8::Value>());
    ENTER_V8;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> hidden_props(i::GetHiddenProperties(self, false));
    if (hidden_props->IsUndefined()) {
      return v8::Local<v8::Value>();
    }
    i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> result = i::GetProperty(hidden_props, key_obj);
    has_pending_exception = result.is_null();
    EXCEPTION_BAILOUT_CHECK(v8::Local<v8::Value>());
    if (result->IsUndefined()) {
      return v8::Local<v8::Value>();
    }
    return Utils::ToLocal(result);
  }
  
  
  bool v8::Object::DeleteHiddenValue(v8::Handle<v8::String> key) {
    ON_BAILOUT("v8::DeleteHiddenValue()", return false);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    i::Handle<i::Object> hidden_props(i::GetHiddenProperties(self, false));
    if (hidden_props->IsUndefined()) {
      return true;
    }
    i::Handle<i::JSObject> js_obj(i::JSObject::cast(*hidden_props));
    i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
    return i::DeleteProperty(js_obj, key_obj)->IsTrue();
  }
  
  
  void v8::Object::SetIndexedPropertiesToPixelData(uint8_t* data, int length) {
    ON_BAILOUT("v8::SetElementsToPixelData()", return);
    ENTER_V8;
    HandleScope scope;
    if (!ApiCheck(length <= i::PixelArray::kMaxLength,
                  "v8::Object::SetIndexedPropertiesToPixelData()",
                  "length exceeds max acceptable value")) {
      return;
    }
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    if (!ApiCheck(!self->IsJSArray(),
                  "v8::Object::SetIndexedPropertiesToPixelData()",
                  "JSArray is not supported")) {
      return;
    }
    i::Handle<i::PixelArray> pixels = i::Factory::NewPixelArray(length, data);
    i::Handle<i::Map> slow_map =
        i::Factory::GetSlowElementsMap(i::Handle<i::Map>(self->map()));
    self->set_map(*slow_map);
    self->set_elements(*pixels);
  }
  
  
  bool v8::Object::HasIndexedPropertiesInPixelData() {
    ON_BAILOUT("v8::HasIndexedPropertiesInPixelData()", return false);
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    return self->HasPixelElements();
  }
  
  
  uint8_t* v8::Object::GetIndexedPropertiesPixelData() {
    ON_BAILOUT("v8::GetIndexedPropertiesPixelData()", return NULL);
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    if (self->HasPixelElements()) {
      return i::PixelArray::cast(self->elements())->external_pointer();
    } else {
      return NULL;
    }
  }
  
  
  int v8::Object::GetIndexedPropertiesPixelDataLength() {
    ON_BAILOUT("v8::GetIndexedPropertiesPixelDataLength()", return -1);
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    if (self->HasPixelElements()) {
      return i::PixelArray::cast(self->elements())->length();
    } else {
      return -1;
    }
  }
  
  
  void v8::Object::SetIndexedPropertiesToExternalArrayData(
      void* data,
      ExternalArrayType array_type,
      int length) {
    ON_BAILOUT("v8::SetIndexedPropertiesToExternalArrayData()", return);
    ENTER_V8;
    HandleScope scope;
    if (!ApiCheck(length <= i::ExternalArray::kMaxLength,
                  "v8::Object::SetIndexedPropertiesToExternalArrayData()",
                  "length exceeds max acceptable value")) {
      return;
    }
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    if (!ApiCheck(!self->IsJSArray(),
                  "v8::Object::SetIndexedPropertiesToExternalArrayData()",
                  "JSArray is not supported")) {
      return;
    }
    i::Handle<i::ExternalArray> array =
        i::Factory::NewExternalArray(length, array_type, data);
    i::Handle<i::Map> slow_map =
        i::Factory::GetSlowElementsMap(i::Handle<i::Map>(self->map()));
    self->set_map(*slow_map);
    self->set_elements(*array);
  }
  
  
  bool v8::Object::HasIndexedPropertiesInExternalArrayData() {
    ON_BAILOUT("v8::HasIndexedPropertiesInExternalArrayData()", return false);
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    return self->HasExternalArrayElements();
  }
  
  
  void* v8::Object::GetIndexedPropertiesExternalArrayData() {
    ON_BAILOUT("v8::GetIndexedPropertiesExternalArrayData()", return NULL);
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    if (self->HasExternalArrayElements()) {
      return i::ExternalArray::cast(self->elements())->external_pointer();
    } else {
      return NULL;
    }
  }
  
  
  ExternalArrayType v8::Object::GetIndexedPropertiesExternalArrayDataType() {
    ON_BAILOUT("v8::GetIndexedPropertiesExternalArrayDataType()",
               return static_cast<ExternalArrayType>(-1));
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    switch (self->elements()->map()->instance_type()) {
      case i::EXTERNAL_BYTE_ARRAY_TYPE:
        return kExternalByteArray;
      case i::EXTERNAL_UNSIGNED_BYTE_ARRAY_TYPE:
        return kExternalUnsignedByteArray;
      case i::EXTERNAL_SHORT_ARRAY_TYPE:
        return kExternalShortArray;
      case i::EXTERNAL_UNSIGNED_SHORT_ARRAY_TYPE:
        return kExternalUnsignedShortArray;
      case i::EXTERNAL_INT_ARRAY_TYPE:
        return kExternalIntArray;
      case i::EXTERNAL_UNSIGNED_INT_ARRAY_TYPE:
        return kExternalUnsignedIntArray;
      case i::EXTERNAL_FLOAT_ARRAY_TYPE:
        return kExternalFloatArray;
      default:
        return static_cast<ExternalArrayType>(-1);
    }
  }
  
  
  int v8::Object::GetIndexedPropertiesExternalArrayDataLength() {
    ON_BAILOUT("v8::GetIndexedPropertiesExternalArrayDataLength()", return 0);
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    if (self->HasExternalArrayElements()) {
      return i::ExternalArray::cast(self->elements())->length();
    } else {
      return -1;
    }
  }
  
  
  Local<v8::Object> Function::NewInstance() const {
    return NewInstance(0, NULL);
  }
  
  
  Local<v8::Object> Function::NewInstance(int argc,
                                          v8::Handle<v8::Value> argv[]) const {
    ON_BAILOUT("v8::Function::NewInstance()", return Local<v8::Object>());
    LOG_API("Function::NewInstance");
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::JSFunction> function = Utils::OpenHandle(this);
    STATIC_ASSERT(sizeof(v8::Handle<v8::Value>) == sizeof(i::Object**));
    i::Object*** args = reinterpret_cast<i::Object***>(argv);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> returned =
        i::Execution::New(function, argc, args, &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(Local<v8::Object>());
    return scope.Close(Utils::ToLocal(i::Handle<i::JSObject>::cast(returned)));
  }
  
  
  Local<v8::Value> Function::Call(v8::Handle<v8::Object> recv, int argc,
                                  v8::Handle<v8::Value> argv[]) {
    ON_BAILOUT("v8::Function::Call()", return Local<v8::Value>());
    LOG_API("Function::Call");
    ENTER_V8;
    i::Object* raw_result = NULL;
    {
      HandleScope scope;
      i::Handle<i::JSFunction> fun = Utils::OpenHandle(this);
      i::Handle<i::Object> recv_obj = Utils::OpenHandle(*recv);
      STATIC_ASSERT(sizeof(v8::Handle<v8::Value>) == sizeof(i::Object**));
      i::Object*** args = reinterpret_cast<i::Object***>(argv);
      EXCEPTION_PREAMBLE();
      i::Handle<i::Object> returned =
          i::Execution::Call(fun, recv_obj, argc, args, &has_pending_exception);
      EXCEPTION_BAILOUT_CHECK(Local<Object>());
      raw_result = *returned;
    }
    i::Handle<i::Object> result(raw_result);
    return Utils::ToLocal(result);
  }
  
  
  void Function::SetName(v8::Handle<v8::String> name) {
    ENTER_V8;
    i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
    func->shared()->set_name(*Utils::OpenHandle(*name));
  }
  
  
  Handle<Value> Function::GetName() const {
    i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
    return Utils::ToLocal(i::Handle<i::Object>(func->shared()->name()));
  }
  
  
  ScriptOrigin Function::GetScriptOrigin() const {
    i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
    if (func->shared()->script()->IsScript()) {
      i::Handle<i::Script> script(i::Script::cast(func->shared()->script()));
      v8::ScriptOrigin origin(
        Utils::ToLocal(i::Handle<i::Object>(script->name())),
        v8::Integer::New(script->line_offset()->value()),
        v8::Integer::New(script->column_offset()->value()));
      return origin;
    }
    return v8::ScriptOrigin(Handle<Value>());
  }
  
  
  const int Function::kLineOffsetNotFound = -1;
  
  
  int Function::GetScriptLineNumber() const {
    i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
    if (func->shared()->script()->IsScript()) {
      i::Handle<i::Script> script(i::Script::cast(func->shared()->script()));
      return i::GetScriptLineNumber(script, func->shared()->start_position());
    }
    return kLineOffsetNotFound;
  }
  
  
  namespace {
  
  // Tracks string usage to help make better decisions when
  // externalizing strings.
  //
  // Implementation note: internally this class only tracks fresh
  // strings and keeps a single use counter for them.
  class StringTracker {
   public:
    // Records that the given string's characters were copied to some
    // external buffer. If this happens often we should honor
    // externalization requests for the string.
    static void RecordWrite(i::Handle<i::String> string) {
      i::Address address = reinterpret_cast<i::Address>(*string);
      i::Address top = i::Heap::NewSpaceTop();
      if (IsFreshString(address, top)) {
        IncrementUseCount(top);
      }
    }
  
    // Estimates freshness and use frequency of the given string based
    // on how close it is to the new space top and the recorded usage
    // history.
    static inline bool IsFreshUnusedString(i::Handle<i::String> string) {
      i::Address address = reinterpret_cast<i::Address>(*string);
      i::Address top = i::Heap::NewSpaceTop();
      return IsFreshString(address, top) && IsUseCountLow(top);
    }
  
   private:
    static inline bool IsFreshString(i::Address string, i::Address top) {
      return top - kFreshnessLimit <= string && string <= top;
    }
  
    static inline bool IsUseCountLow(i::Address top) {
      if (last_top_ != top) return true;
      return use_count_ < kUseLimit;
    }
  
    static inline void IncrementUseCount(i::Address top) {
      if (last_top_ != top) {
        use_count_ = 0;
        last_top_ = top;
      }
      ++use_count_;
    }
  
    // How close to the new space top a fresh string has to be.
    static const int kFreshnessLimit = 1024;
  
    // The number of uses required to consider a string useful.
    static const int kUseLimit = 32;
  
    // Single use counter shared by all fresh strings.
    static int use_count_;
  
    // Last new space top when the use count above was valid.
    static i::Address last_top_;
  };
  
  int StringTracker::use_count_ = 0;
  i::Address StringTracker::last_top_ = NULL;
  
  }  // namespace
  
  
  int String::Length() const {
    if (IsDeadCheck("v8::String::Length()")) return 0;
    return Utils::OpenHandle(this)->length();
  }
  
  
  int String::Utf8Length() const {
    if (IsDeadCheck("v8::String::Utf8Length()")) return 0;
    return Utils::OpenHandle(this)->Utf8Length();
  }
  
  
  int String::WriteUtf8(char* buffer,
                        int capacity,
                        int* nchars_ref,
                        WriteHints hints) const {
    if (IsDeadCheck("v8::String::WriteUtf8()")) return 0;
    LOG_API("String::WriteUtf8");
    ENTER_V8;
    i::Handle<i::String> str = Utils::OpenHandle(this);
    StringTracker::RecordWrite(str);
    if (hints & HINT_MANY_WRITES_EXPECTED) {
      // Flatten the string for efficiency.  This applies whether we are
      // using StringInputBuffer or Get(i) to access the characters.
      str->TryFlatten();
    }
    write_input_buffer.Reset(0, *str);
    int len = str->length();
    // Encode the first K - 3 bytes directly into the buffer since we
    // know there's room for them.  If no capacity is given we copy all
    // of them here.
    int fast_end = capacity - (unibrow::Utf8::kMaxEncodedSize - 1);
    int i;
    int pos = 0;
    int nchars = 0;
    for (i = 0; i < len && (capacity == -1 || pos < fast_end); i++) {
      i::uc32 c = write_input_buffer.GetNext();
      int written = unibrow::Utf8::Encode(buffer + pos, c);
      pos += written;
      nchars++;
    }
    if (i < len) {
      // For the last characters we need to check the length for each one
      // because they may be longer than the remaining space in the
      // buffer.
      char intermediate[unibrow::Utf8::kMaxEncodedSize];
      for (; i < len && pos < capacity; i++) {
        i::uc32 c = write_input_buffer.GetNext();
        int written = unibrow::Utf8::Encode(intermediate, c);
        if (pos + written <= capacity) {
          for (int j = 0; j < written; j++)
            buffer[pos + j] = intermediate[j];
          pos += written;
          nchars++;
        } else {
          // We've reached the end of the buffer
          break;
        }
      }
    }
    if (nchars_ref != NULL) *nchars_ref = nchars;
    if (i == len && (capacity == -1 || pos < capacity))
      buffer[pos++] = '\0';
    return pos;
  }
  
  
  int String::WriteAscii(char* buffer,
                         int start,
                         int length,
                         WriteHints hints) const {
    if (IsDeadCheck("v8::String::WriteAscii()")) return 0;
    LOG_API("String::WriteAscii");
    ENTER_V8;
    ASSERT(start >= 0 && length >= -1);
    i::Handle<i::String> str = Utils::OpenHandle(this);
    StringTracker::RecordWrite(str);
    if (hints & HINT_MANY_WRITES_EXPECTED) {
      // Flatten the string for efficiency.  This applies whether we are
      // using StringInputBuffer or Get(i) to access the characters.
      str->TryFlatten();
    }
    int end = length;
    if ( (length == -1) || (length > str->length() - start) )
      end = str->length() - start;
    if (end < 0) return 0;
    write_input_buffer.Reset(start, *str);
    int i;
    for (i = 0; i < end; i++) {
      char c = static_cast<char>(write_input_buffer.GetNext());
      if (c == '\0') c = ' ';
      buffer[i] = c;
    }
    if (length == -1 || i < length)
      buffer[i] = '\0';
    return i;
  }
  
  
  int String::Write(uint16_t* buffer,
                    int start,
                    int length,
                    WriteHints hints) const {
    if (IsDeadCheck("v8::String::Write()")) return 0;
    LOG_API("String::Write");
    ENTER_V8;
    ASSERT(start >= 0 && length >= -1);
    i::Handle<i::String> str = Utils::OpenHandle(this);
    StringTracker::RecordWrite(str);
    if (hints & HINT_MANY_WRITES_EXPECTED) {
      // Flatten the string for efficiency.  This applies whether we are
      // using StringInputBuffer or Get(i) to access the characters.
      str->TryFlatten();
    }
    int end = start + length;
    if ((length == -1) || (length > str->length() - start) )
      end = str->length();
    if (end < 0) return 0;
    i::String::WriteToFlat(*str, buffer, start, end);
    if (length == -1 || end - start < length) {
      buffer[end - start] = '\0';
    }
    return end - start;
  }
  
  
  bool v8::String::IsExternal() const {
    EnsureInitialized("v8::String::IsExternal()");
    i::Handle<i::String> str = Utils::OpenHandle(this);
    return i::StringShape(*str).IsExternalTwoByte();
  }
  
  
  bool v8::String::IsExternalAscii() const {
    EnsureInitialized("v8::String::IsExternalAscii()");
    i::Handle<i::String> str = Utils::OpenHandle(this);
    return i::StringShape(*str).IsExternalAscii();
  }
  
  
  void v8::String::VerifyExternalStringResource(
      v8::String::ExternalStringResource* value) const {
    i::Handle<i::String> str = Utils::OpenHandle(this);
    v8::String::ExternalStringResource* expected;
    if (i::StringShape(*str).IsExternalTwoByte()) {
      void* resource = i::Handle<i::ExternalTwoByteString>::cast(str)->resource();
      expected = reinterpret_cast<ExternalStringResource*>(resource);
    } else {
      expected = NULL;
    }
    CHECK_EQ(expected, value);
  }
  
  
  v8::String::ExternalAsciiStringResource*
        v8::String::GetExternalAsciiStringResource() const {
    EnsureInitialized("v8::String::GetExternalAsciiStringResource()");
    i::Handle<i::String> str = Utils::OpenHandle(this);
    if (i::StringShape(*str).IsExternalAscii()) {
      void* resource = i::Handle<i::ExternalAsciiString>::cast(str)->resource();
      return reinterpret_cast<ExternalAsciiStringResource*>(resource);
    } else {
      return NULL;
    }
  }
  
  
  double Number::Value() const {
    if (IsDeadCheck("v8::Number::Value()")) return 0;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    return obj->Number();
  }
  
  
  bool Boolean::Value() const {
    if (IsDeadCheck("v8::Boolean::Value()")) return false;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    return obj->IsTrue();
  }
  
  
  int64_t Integer::Value() const {
    if (IsDeadCheck("v8::Integer::Value()")) return 0;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    if (obj->IsSmi()) {
      return i::Smi::cast(*obj)->value();
    } else {
      return static_cast<int64_t>(obj->Number());
    }
  }
  
  
  int32_t Int32::Value() const {
    if (IsDeadCheck("v8::Int32::Value()")) return 0;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    if (obj->IsSmi()) {
      return i::Smi::cast(*obj)->value();
    } else {
      return static_cast<int32_t>(obj->Number());
    }
  }
  
  
  uint32_t Uint32::Value() const {
    if (IsDeadCheck("v8::Uint32::Value()")) return 0;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    if (obj->IsSmi()) {
      return i::Smi::cast(*obj)->value();
    } else {
      return static_cast<uint32_t>(obj->Number());
    }
  }
  
  
  int v8::Object::InternalFieldCount() {
    if (IsDeadCheck("v8::Object::InternalFieldCount()")) return 0;
    i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
    return obj->GetInternalFieldCount();
  }
  
  
  Local<Value> v8::Object::CheckedGetInternalField(int index) {
    if (IsDeadCheck("v8::Object::GetInternalField()")) return Local<Value>();
    i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
    if (!ApiCheck(index < obj->GetInternalFieldCount(),
                  "v8::Object::GetInternalField()",
                  "Reading internal field out of bounds")) {
      return Local<Value>();
    }
    i::Handle<i::Object> value(obj->GetInternalField(index));
    Local<Value> result = Utils::ToLocal(value);
  #ifdef DEBUG
    Local<Value> unchecked = UncheckedGetInternalField(index);
    ASSERT(unchecked.IsEmpty() || (unchecked == result));
  #endif
    return result;
  }
  
  
  void v8::Object::SetInternalField(int index, v8::Handle<Value> value) {
    if (IsDeadCheck("v8::Object::SetInternalField()")) return;
    i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
    if (!ApiCheck(index < obj->GetInternalFieldCount(),
                  "v8::Object::SetInternalField()",
                  "Writing internal field out of bounds")) {
      return;
    }
    ENTER_V8;
    i::Handle<i::Object> val = Utils::OpenHandle(*value);
    obj->SetInternalField(index, *val);
  }
  
  
  static bool CanBeEncodedAsSmi(void* ptr) {
    const uintptr_t address = reinterpret_cast<uintptr_t>(ptr);
    return ((address & i::kEncodablePointerMask) == 0);
  }
  
  
  static i::Smi* EncodeAsSmi(void* ptr) {
    ASSERT(CanBeEncodedAsSmi(ptr));
    const uintptr_t address = reinterpret_cast<uintptr_t>(ptr);
    i::Smi* result = reinterpret_cast<i::Smi*>(address << i::kPointerToSmiShift);
    ASSERT(i::Internals::HasSmiTag(result));
    ASSERT_EQ(result, i::Smi::FromInt(result->value()));
    ASSERT_EQ(ptr, i::Internals::GetExternalPointerFromSmi(result));
    return result;
  }
  
  
  void v8::Object::SetPointerInInternalField(int index, void* value) {
    ENTER_V8;
    if (CanBeEncodedAsSmi(value)) {
      Utils::OpenHandle(this)->SetInternalField(index, EncodeAsSmi(value));
    } else {
      HandleScope scope;
      i::Handle<i::Proxy> proxy =
          i::Factory::NewProxy(reinterpret_cast<i::Address>(value), i::TENURED);
      if (!proxy.is_null())
          Utils::OpenHandle(this)->SetInternalField(index, *proxy);
    }
    ASSERT_EQ(value, GetPointerFromInternalField(index));
  }
  
  
  // --- E n v i r o n m e n t ---
  
  bool v8::V8::Initialize() {
    if (i::V8::IsRunning()) return true;
    HandleScope scope;
    if (i::Snapshot::Initialize()) return true;
    return i::V8::Initialize(NULL);
  }
  
  
  bool v8::V8::Dispose() {
    i::V8::TearDown();
    return true;
  }
  
  
  HeapStatistics::HeapStatistics(): total_heap_size_(0),
                                    total_heap_size_executable_(0),
                                    used_heap_size_(0),
                                    heap_size_limit_(0) { }
  
  
  void v8::V8::GetHeapStatistics(HeapStatistics* heap_statistics) {
    heap_statistics->set_total_heap_size(i::Heap::CommittedMemory());
    heap_statistics->set_total_heap_size_executable(
        i::Heap::CommittedMemoryExecutable());
    heap_statistics->set_used_heap_size(i::Heap::SizeOfObjects());
    heap_statistics->set_heap_size_limit(i::Heap::MaxReserved());
  }
  
  
  bool v8::V8::IdleNotification() {
    // Returning true tells the caller that it need not
    // continue to call IdleNotification.
    if (!i::V8::IsRunning()) return true;
    return i::V8::IdleNotification();
  }
  
  
  void v8::V8::LowMemoryNotification() {
    if (!i::V8::IsRunning()) return;
    i::Heap::CollectAllGarbage(true);
  }
  
  
  int v8::V8::ContextDisposedNotification() {
    if (!i::V8::IsRunning()) return 0;
    return i::Heap::NotifyContextDisposed();
  }
  
  
  const char* v8::V8::GetVersion() {
    static v8::internal::EmbeddedVector<char, 128> buffer;
    v8::internal::Version::GetString(buffer);
    return buffer.start();
  }
  
  
  static i::Handle<i::FunctionTemplateInfo>
      EnsureConstructor(i::Handle<i::ObjectTemplateInfo> templ) {
    if (templ->constructor()->IsUndefined()) {
      Local<FunctionTemplate> constructor = FunctionTemplate::New();
      Utils::OpenHandle(*constructor)->set_instance_template(*templ);
      templ->set_constructor(*Utils::OpenHandle(*constructor));
    }
    return i::Handle<i::FunctionTemplateInfo>(
      i::FunctionTemplateInfo::cast(templ->constructor()));
  }
  
  
  Persistent<Context> v8::Context::New(
      v8::ExtensionConfiguration* extensions,
      v8::Handle<ObjectTemplate> global_template,
      v8::Handle<Value> global_object) {
    EnsureInitialized("v8::Context::New()");
    LOG_API("Context::New");
    ON_BAILOUT("v8::Context::New()", return Persistent<Context>());
  
    // Enter V8 via an ENTER_V8 scope.
    i::Handle<i::Context> env;
    {
      ENTER_V8;
      v8::Handle<ObjectTemplate> proxy_template = global_template;
      i::Handle<i::FunctionTemplateInfo> proxy_constructor;
      i::Handle<i::FunctionTemplateInfo> global_constructor;
  
      if (!global_template.IsEmpty()) {
        // Make sure that the global_template has a constructor.
        global_constructor =
            EnsureConstructor(Utils::OpenHandle(*global_template));
  
        // Create a fresh template for the global proxy object.
        proxy_template = ObjectTemplate::New();
        proxy_constructor =
            EnsureConstructor(Utils::OpenHandle(*proxy_template));
  
        // Set the global template to be the prototype template of
        // global proxy template.
        proxy_constructor->set_prototype_template(
            *Utils::OpenHandle(*global_template));
  
        // Migrate security handlers from global_template to
        // proxy_template.  Temporarily removing access check
        // information from the global template.
        if (!global_constructor->access_check_info()->IsUndefined()) {
          proxy_constructor->set_access_check_info(
              global_constructor->access_check_info());
          proxy_constructor->set_needs_access_check(
              global_constructor->needs_access_check());
          global_constructor->set_needs_access_check(false);
          global_constructor->set_access_check_info(i::Heap::undefined_value());
        }
      }
  
      // Create the environment.
      env = i::Bootstrapper::CreateEnvironment(
          Utils::OpenHandle(*global_object),
          proxy_template,
          extensions);
  
      // Restore the access check info on the global template.
      if (!global_template.IsEmpty()) {
        ASSERT(!global_constructor.is_null());
        ASSERT(!proxy_constructor.is_null());
        global_constructor->set_access_check_info(
            proxy_constructor->access_check_info());
        global_constructor->set_needs_access_check(
            proxy_constructor->needs_access_check());
      }
      i::RuntimeProfiler::Reset();
    }
    // Leave V8.
  
    if (env.is_null())
      return Persistent<Context>();
    return Persistent<Context>(Utils::ToLocal(env));
  }
  
  
  void v8::Context::SetSecurityToken(Handle<Value> token) {
    if (IsDeadCheck("v8::Context::SetSecurityToken()")) return;
    ENTER_V8;
    i::Handle<i::Context> env = Utils::OpenHandle(this);
    i::Handle<i::Object> token_handle = Utils::OpenHandle(*token);
    env->set_security_token(*token_handle);
  }
  
  
  void v8::Context::UseDefaultSecurityToken() {
    if (IsDeadCheck("v8::Context::UseDefaultSecurityToken()")) return;
    ENTER_V8;
    i::Handle<i::Context> env = Utils::OpenHandle(this);
    env->set_security_token(env->global());
  }
  
  
  Handle<Value> v8::Context::GetSecurityToken() {
    if (IsDeadCheck("v8::Context::GetSecurityToken()")) return Handle<Value>();
    i::Handle<i::Context> env = Utils::OpenHandle(this);
    i::Object* security_token = env->security_token();
    i::Handle<i::Object> token_handle(security_token);
    return Utils::ToLocal(token_handle);
  }
  
  
  bool Context::HasOutOfMemoryException() {
    i::Handle<i::Context> env = Utils::OpenHandle(this);
    return env->has_out_of_memory();
  }
  
  
  bool Context::InContext() {
    return i::Top::context() != NULL;
  }
  
  
  v8::Local<v8::Context> Context::GetEntered() {
    if (IsDeadCheck("v8::Context::GetEntered()")) return Local<Context>();
    i::Handle<i::Object> last = thread_local.LastEnteredContext();
    if (last.is_null()) return Local<Context>();
    i::Handle<i::Context> context = i::Handle<i::Context>::cast(last);
    return Utils::ToLocal(context);
  }
  
  
  v8::Local<v8::Context> Context::GetCurrent() {
    if (IsDeadCheck("v8::Context::GetCurrent()")) return Local<Context>();
    i::Handle<i::Object> current = i::Top::global_context();
    if (current.is_null()) return Local<Context>();
    i::Handle<i::Context> context = i::Handle<i::Context>::cast(current);
    return Utils::ToLocal(context);
  }
  
  
  v8::Local<v8::Context> Context::GetCalling() {
    if (IsDeadCheck("v8::Context::GetCalling()")) return Local<Context>();
    i::Handle<i::Object> calling = i::Top::GetCallingGlobalContext();
    if (calling.is_null()) return Local<Context>();
    i::Handle<i::Context> context = i::Handle<i::Context>::cast(calling);
    return Utils::ToLocal(context);
  }
  
  
  v8::Local<v8::Object> Context::Global() {
    if (IsDeadCheck("v8::Context::Global()")) return Local<v8::Object>();
    i::Object** ctx = reinterpret_cast<i::Object**>(this);
    i::Handle<i::Context> context =
        i::Handle<i::Context>::cast(i::Handle<i::Object>(ctx));
    i::Handle<i::Object> global(context->global_proxy());
    return Utils::ToLocal(i::Handle<i::JSObject>::cast(global));
  }
  
  
  void Context::DetachGlobal() {
    if (IsDeadCheck("v8::Context::DetachGlobal()")) return;
    ENTER_V8;
    i::Object** ctx = reinterpret_cast<i::Object**>(this);
    i::Handle<i::Context> context =
        i::Handle<i::Context>::cast(i::Handle<i::Object>(ctx));
    i::Bootstrapper::DetachGlobal(context);
  }
  
  
  void Context::ReattachGlobal(Handle<Object> global_object) {
    if (IsDeadCheck("v8::Context::ReattachGlobal()")) return;
    ENTER_V8;
    i::Object** ctx = reinterpret_cast<i::Object**>(this);
    i::Handle<i::Context> context =
        i::Handle<i::Context>::cast(i::Handle<i::Object>(ctx));
    i::Bootstrapper::ReattachGlobal(context, Utils::OpenHandle(*global_object));
  }
  
  
  Local<v8::Object> ObjectTemplate::NewInstance() {
    ON_BAILOUT("v8::ObjectTemplate::NewInstance()", return Local<v8::Object>());
    LOG_API("ObjectTemplate::NewInstance");
    ENTER_V8;
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> obj =
        i::Execution::InstantiateObject(Utils::OpenHandle(this),
                                        &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(Local<v8::Object>());
    return Utils::ToLocal(i::Handle<i::JSObject>::cast(obj));
  }
  
  
  Local<v8::Function> FunctionTemplate::GetFunction() {
    ON_BAILOUT("v8::FunctionTemplate::GetFunction()",
               return Local<v8::Function>());
    LOG_API("FunctionTemplate::GetFunction");
    ENTER_V8;
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> obj =
        i::Execution::InstantiateFunction(Utils::OpenHandle(this),
                                          &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(Local<v8::Function>());
    return Utils::ToLocal(i::Handle<i::JSFunction>::cast(obj));
  }
  
  
  bool FunctionTemplate::HasInstance(v8::Handle<v8::Value> value) {
    ON_BAILOUT("v8::FunctionTemplate::HasInstanceOf()", return false);
    i::Object* obj = *Utils::OpenHandle(*value);
    return obj->IsInstanceOf(*Utils::OpenHandle(this));
  }
  
  
  static Local<External> ExternalNewImpl(void* data) {
    return Utils::ToLocal(i::Factory::NewProxy(static_cast<i::Address>(data)));
  }
  
  static void* ExternalValueImpl(i::Handle<i::Object> obj) {
    return reinterpret_cast<void*>(i::Proxy::cast(*obj)->proxy());
  }
  
  
  Local<Value> v8::External::Wrap(void* data) {
    STATIC_ASSERT(sizeof(data) == sizeof(i::Address));
    LOG_API("External::Wrap");
    EnsureInitialized("v8::External::Wrap()");
    ENTER_V8;
  
    v8::Local<v8::Value> result = CanBeEncodedAsSmi(data)
        ? Utils::ToLocal(i::Handle<i::Object>(EncodeAsSmi(data)))
        : v8::Local<v8::Value>(ExternalNewImpl(data));
  
    ASSERT_EQ(data, Unwrap(result));
    return result;
  }
  
  
  void* v8::Object::SlowGetPointerFromInternalField(int index) {
    i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
    i::Object* value = obj->GetInternalField(index);
    if (value->IsSmi()) {
      return i::Internals::GetExternalPointerFromSmi(value);
    } else if (value->IsProxy()) {
      return reinterpret_cast<void*>(i::Proxy::cast(value)->proxy());
    } else {
      return NULL;
    }
  }
  
  
  void* v8::External::FullUnwrap(v8::Handle<v8::Value> wrapper) {
    if (IsDeadCheck("v8::External::Unwrap()")) return 0;
    i::Handle<i::Object> obj = Utils::OpenHandle(*wrapper);
    void* result;
    if (obj->IsSmi()) {
      result = i::Internals::GetExternalPointerFromSmi(*obj);
    } else if (obj->IsProxy()) {
      result = ExternalValueImpl(obj);
    } else {
      result = NULL;
    }
    ASSERT_EQ(result, QuickUnwrap(wrapper));
    return result;
  }
  
  
  Local<External> v8::External::New(void* data) {
    STATIC_ASSERT(sizeof(data) == sizeof(i::Address));
    LOG_API("External::New");
    EnsureInitialized("v8::External::New()");
    ENTER_V8;
    return ExternalNewImpl(data);
  }
  
  
  void* External::Value() const {
    if (IsDeadCheck("v8::External::Value()")) return 0;
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    return ExternalValueImpl(obj);
  }
  
  
  Local<String> v8::String::Empty() {
    EnsureInitialized("v8::String::Empty()");
    LOG_API("String::Empty()");
    return Utils::ToLocal(i::Factory::empty_symbol());
  }
  
  
  Local<String> v8::String::New(const char* data, int length) {
    EnsureInitialized("v8::String::New()");
    LOG_API("String::New(char)");
    if (length == 0) return Empty();
    ENTER_V8;
    if (length == -1) length = i::StrLength(data);
    i::Handle<i::String> result =
        i::Factory::NewStringFromUtf8(i::Vector<const char>(data, length));
    return Utils::ToLocal(result);
  }
  
  
  Local<String> v8::String::Concat(Handle<String> left, Handle<String> right) {
    EnsureInitialized("v8::String::New()");
    LOG_API("String::New(char)");
    ENTER_V8;
    i::Handle<i::String> left_string = Utils::OpenHandle(*left);
    i::Handle<i::String> right_string = Utils::OpenHandle(*right);
    i::Handle<i::String> result = i::Factory::NewConsString(left_string,
                                                            right_string);
    return Utils::ToLocal(result);
  }
  
  
  Local<String> v8::String::NewUndetectable(const char* data, int length) {
    EnsureInitialized("v8::String::NewUndetectable()");
    LOG_API("String::NewUndetectable(char)");
    ENTER_V8;
    if (length == -1) length = i::StrLength(data);
    i::Handle<i::String> result =
        i::Factory::NewStringFromUtf8(i::Vector<const char>(data, length));
    result->MarkAsUndetectable();
    return Utils::ToLocal(result);
  }
  
  
  static int TwoByteStringLength(const uint16_t* data) {
    int length = 0;
    while (data[length] != '\0') length++;
    return length;
  }
  
  
  Local<String> v8::String::New(const uint16_t* data, int length) {
    EnsureInitialized("v8::String::New()");
    LOG_API("String::New(uint16_)");
    if (length == 0) return Empty();
    ENTER_V8;
    if (length == -1) length = TwoByteStringLength(data);
    i::Handle<i::String> result =
        i::Factory::NewStringFromTwoByte(i::Vector<const uint16_t>(data, length));
    return Utils::ToLocal(result);
  }
  
  
  Local<String> v8::String::NewUndetectable(const uint16_t* data, int length) {
    EnsureInitialized("v8::String::NewUndetectable()");
    LOG_API("String::NewUndetectable(uint16_)");
    ENTER_V8;
    if (length == -1) length = TwoByteStringLength(data);
    i::Handle<i::String> result =
        i::Factory::NewStringFromTwoByte(i::Vector<const uint16_t>(data, length));
    result->MarkAsUndetectable();
    return Utils::ToLocal(result);
  }
  
  
  i::Handle<i::String> NewExternalStringHandle(
        v8::String::ExternalStringResource* resource) {
    i::Handle<i::String> result =
        i::Factory::NewExternalStringFromTwoByte(resource);
    return result;
  }
  
  
  i::Handle<i::String> NewExternalAsciiStringHandle(
        v8::String::ExternalAsciiStringResource* resource) {
    i::Handle<i::String> result =
        i::Factory::NewExternalStringFromAscii(resource);
    return result;
  }
  
  
  Local<String> v8::String::NewExternal(
        v8::String::ExternalStringResource* resource) {
    EnsureInitialized("v8::String::NewExternal()");
    LOG_API("String::NewExternal");
    ENTER_V8;
    i::Handle<i::String> result = NewExternalStringHandle(resource);
    i::ExternalStringTable::AddString(*result);
    return Utils::ToLocal(result);
  }
  
  
  bool v8::String::MakeExternal(v8::String::ExternalStringResource* resource) {
    if (IsDeadCheck("v8::String::MakeExternal()")) return false;
    if (this->IsExternal()) return false;  // Already an external string.
    ENTER_V8;
    i::Handle<i::String> obj = Utils::OpenHandle(this);
    if (StringTracker::IsFreshUnusedString(obj)) return false;
    bool result = obj->MakeExternal(resource);
    if (result && !obj->IsSymbol()) {
      i::ExternalStringTable::AddString(*obj);
    }
    return result;
  }
  
  
  Local<String> v8::String::NewExternal(
        v8::String::ExternalAsciiStringResource* resource) {
    EnsureInitialized("v8::String::NewExternal()");
    LOG_API("String::NewExternal");
    ENTER_V8;
    i::Handle<i::String> result = NewExternalAsciiStringHandle(resource);
    i::ExternalStringTable::AddString(*result);
    return Utils::ToLocal(result);
  }
  
  
  bool v8::String::MakeExternal(
      v8::String::ExternalAsciiStringResource* resource) {
    if (IsDeadCheck("v8::String::MakeExternal()")) return false;
    if (this->IsExternal()) return false;  // Already an external string.
    ENTER_V8;
    i::Handle<i::String> obj = Utils::OpenHandle(this);
    if (StringTracker::IsFreshUnusedString(obj)) return false;
    bool result = obj->MakeExternal(resource);
    if (result && !obj->IsSymbol()) {
      i::ExternalStringTable::AddString(*obj);
    }
    return result;
  }
  
  
  bool v8::String::CanMakeExternal() {
    if (IsDeadCheck("v8::String::CanMakeExternal()")) return false;
    i::Handle<i::String> obj = Utils::OpenHandle(this);
    if (StringTracker::IsFreshUnusedString(obj)) return false;
    int size = obj->Size();  // Byte size of the original string.
    if (size < i::ExternalString::kSize)
      return false;
    i::StringShape shape(*obj);
    return !shape.IsExternal();
  }
  
  
  Local<v8::Object> v8::Object::New() {
    EnsureInitialized("v8::Object::New()");
    LOG_API("Object::New");
    ENTER_V8;
    i::Handle<i::JSObject> obj =
        i::Factory::NewJSObject(i::Top::object_function());
    return Utils::ToLocal(obj);
  }
  
  
  Local<v8::Value> v8::Date::New(double time) {
    EnsureInitialized("v8::Date::New()");
    LOG_API("Date::New");
    if (isnan(time)) {
      // Introduce only canonical NaN value into the VM, to avoid signaling NaNs.
      time = i::OS::nan_value();
    }
    ENTER_V8;
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> obj =
        i::Execution::NewDate(time, &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(Local<v8::Value>());
    return Utils::ToLocal(obj);
  }
  
  
  double v8::Date::NumberValue() const {
    if (IsDeadCheck("v8::Date::NumberValue()")) return 0;
    LOG_API("Date::NumberValue");
    i::Handle<i::Object> obj = Utils::OpenHandle(this);
    i::Handle<i::JSValue> jsvalue = i::Handle<i::JSValue>::cast(obj);
    return jsvalue->value()->Number();
  }
  
  
  void v8::Date::DateTimeConfigurationChangeNotification() {
    ON_BAILOUT("v8::Date::DateTimeConfigurationChangeNotification()", return);
    LOG_API("Date::DateTimeConfigurationChangeNotification");
    ENTER_V8;
  
    HandleScope scope;
  
    // Get the function ResetDateCache (defined in date-delay.js).
    i::Handle<i::String> func_name_str =
        i::Factory::LookupAsciiSymbol("ResetDateCache");
    i::MaybeObject* result = i::Top::builtins()->GetProperty(*func_name_str);
    i::Object* object_func;
    if (!result->ToObject(&object_func)) {
      return;
    }
  
    if (object_func->IsJSFunction()) {
      i::Handle<i::JSFunction> func =
          i::Handle<i::JSFunction>(i::JSFunction::cast(object_func));
  
      // Call ResetDateCache(0 but expect no exceptions:
      bool caught_exception = false;
      i::Handle<i::Object> result =
          i::Execution::TryCall(func, i::Top::builtins(), 0, NULL,
          &caught_exception);
    }
  }
  
  
  static i::Handle<i::String> RegExpFlagsToString(RegExp::Flags flags) {
    char flags_buf[3];
    int num_flags = 0;
    if ((flags & RegExp::kGlobal) != 0) flags_buf[num_flags++] = 'g';
    if ((flags & RegExp::kMultiline) != 0) flags_buf[num_flags++] = 'm';
    if ((flags & RegExp::kIgnoreCase) != 0) flags_buf[num_flags++] = 'i';
    ASSERT(num_flags <= static_cast<int>(ARRAY_SIZE(flags_buf)));
    return i::Factory::LookupSymbol(
        i::Vector<const char>(flags_buf, num_flags));
  }
  
  
  Local<v8::RegExp> v8::RegExp::New(Handle<String> pattern,
                                    Flags flags) {
    EnsureInitialized("v8::RegExp::New()");
    LOG_API("RegExp::New");
    ENTER_V8;
    EXCEPTION_PREAMBLE();
    i::Handle<i::JSRegExp> obj = i::Execution::NewJSRegExp(
        Utils::OpenHandle(*pattern),
        RegExpFlagsToString(flags),
        &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(Local<v8::RegExp>());
    return Utils::ToLocal(i::Handle<i::JSRegExp>::cast(obj));
  }
  
  
  Local<v8::String> v8::RegExp::GetSource() const {
    if (IsDeadCheck("v8::RegExp::GetSource()")) return Local<v8::String>();
    i::Handle<i::JSRegExp> obj = Utils::OpenHandle(this);
    return Utils::ToLocal(i::Handle<i::String>(obj->Pattern()));
  }
  
  
  // Assert that the static flags cast in GetFlags is valid.
  #define REGEXP_FLAG_ASSERT_EQ(api_flag, internal_flag)        \
    STATIC_ASSERT(static_cast<int>(v8::RegExp::api_flag) ==     \
                  static_cast<int>(i::JSRegExp::internal_flag))
  REGEXP_FLAG_ASSERT_EQ(kNone, NONE);
  REGEXP_FLAG_ASSERT_EQ(kGlobal, GLOBAL);
  REGEXP_FLAG_ASSERT_EQ(kIgnoreCase, IGNORE_CASE);
  REGEXP_FLAG_ASSERT_EQ(kMultiline, MULTILINE);
  #undef REGEXP_FLAG_ASSERT_EQ
  
  v8::RegExp::Flags v8::RegExp::GetFlags() const {
    if (IsDeadCheck("v8::RegExp::GetFlags()")) return v8::RegExp::kNone;
    i::Handle<i::JSRegExp> obj = Utils::OpenHandle(this);
    return static_cast<RegExp::Flags>(obj->GetFlags().value());
  }
  
  
  Local<v8::Array> v8::Array::New(int length) {
    EnsureInitialized("v8::Array::New()");
    LOG_API("Array::New");
    ENTER_V8;
    i::Handle<i::JSArray> obj = i::Factory::NewJSArray(length);
    return Utils::ToLocal(obj);
  }
  
  
  uint32_t v8::Array::Length() const {
    if (IsDeadCheck("v8::Array::Length()")) return 0;
    i::Handle<i::JSArray> obj = Utils::OpenHandle(this);
    i::Object* length = obj->length();
    if (length->IsSmi()) {
      return i::Smi::cast(length)->value();
    } else {
      return static_cast<uint32_t>(length->Number());
    }
  }
  
  
  Local<Object> Array::CloneElementAt(uint32_t index) {
    ON_BAILOUT("v8::Array::CloneElementAt()", return Local<Object>());
    i::Handle<i::JSObject> self = Utils::OpenHandle(this);
    if (!self->HasFastElements()) {
      return Local<Object>();
    }
    i::FixedArray* elms = i::FixedArray::cast(self->elements());
    i::Object* paragon = elms->get(index);
    if (!paragon->IsJSObject()) {
      return Local<Object>();
    }
    i::Handle<i::JSObject> paragon_handle(i::JSObject::cast(paragon));
    EXCEPTION_PREAMBLE();
    ENTER_V8;
    i::Handle<i::JSObject> result = i::Copy(paragon_handle);
    has_pending_exception = result.is_null();
    EXCEPTION_BAILOUT_CHECK(Local<Object>());
    return Utils::ToLocal(result);
  }
  
  
  Local<String> v8::String::NewSymbol(const char* data, int length) {
    EnsureInitialized("v8::String::NewSymbol()");
    LOG_API("String::NewSymbol(char)");
    ENTER_V8;
    if (length == -1) length = i::StrLength(data);
    i::Handle<i::String> result =
        i::Factory::LookupSymbol(i::Vector<const char>(data, length));
    return Utils::ToLocal(result);
  }
  
  
  Local<Number> v8::Number::New(double value) {
    EnsureInitialized("v8::Number::New()");
    if (isnan(value)) {
      // Introduce only canonical NaN value into the VM, to avoid signaling NaNs.
      value = i::OS::nan_value();
    }
    ENTER_V8;
    i::Handle<i::Object> result = i::Factory::NewNumber(value);
    return Utils::NumberToLocal(result);
  }
  
  
  Local<Integer> v8::Integer::New(int32_t value) {
    EnsureInitialized("v8::Integer::New()");
    if (i::Smi::IsValid(value)) {
      return Utils::IntegerToLocal(i::Handle<i::Object>(i::Smi::FromInt(value)));
    }
    ENTER_V8;
    i::Handle<i::Object> result = i::Factory::NewNumber(value);
    return Utils::IntegerToLocal(result);
  }
  
  
  Local<Integer> Integer::NewFromUnsigned(uint32_t value) {
    bool fits_into_int32_t = (value & (1 << 31)) == 0;
    if (fits_into_int32_t) {
      return Integer::New(static_cast<int32_t>(value));
    }
    ENTER_V8;
    i::Handle<i::Object> result = i::Factory::NewNumber(value);
    return Utils::IntegerToLocal(result);
  }
  
  
  void V8::IgnoreOutOfMemoryException() {
    thread_local.set_ignore_out_of_memory(true);
  }
  
  
  bool V8::AddMessageListener(MessageCallback that, Handle<Value> data) {
    EnsureInitialized("v8::V8::AddMessageListener()");
    ON_BAILOUT("v8::V8::AddMessageListener()", return false);
    ENTER_V8;
    HandleScope scope;
    NeanderArray listeners(i::Factory::message_listeners());
    NeanderObject obj(2);
    obj.set(0, *i::Factory::NewProxy(FUNCTION_ADDR(that)));
    obj.set(1, data.IsEmpty() ?
               i::Heap::undefined_value() :
               *Utils::OpenHandle(*data));
    listeners.add(obj.value());
    return true;
  }
  
  
  void V8::RemoveMessageListeners(MessageCallback that) {
    EnsureInitialized("v8::V8::RemoveMessageListener()");
    ON_BAILOUT("v8::V8::RemoveMessageListeners()", return);
    ENTER_V8;
    HandleScope scope;
    NeanderArray listeners(i::Factory::message_listeners());
    for (int i = 0; i < listeners.length(); i++) {
      if (listeners.get(i)->IsUndefined()) continue;  // skip deleted ones
  
      NeanderObject listener(i::JSObject::cast(listeners.get(i)));
      i::Handle<i::Proxy> callback_obj(i::Proxy::cast(listener.get(0)));
      if (callback_obj->proxy() == FUNCTION_ADDR(that)) {
        listeners.set(i, i::Heap::undefined_value());
      }
    }
  }
  
  
  void V8::SetCaptureStackTraceForUncaughtExceptions(
        bool capture,
        int frame_limit,
        StackTrace::StackTraceOptions options) {
    i::Top::SetCaptureStackTraceForUncaughtExceptions(
        capture,
        frame_limit,
        options);
  }
  
  
  void V8::SetCounterFunction(CounterLookupCallback callback) {
    if (IsDeadCheck("v8::V8::SetCounterFunction()")) return;
    i::StatsTable::SetCounterFunction(callback);
  }
  
  void V8::SetCreateHistogramFunction(CreateHistogramCallback callback) {
    if (IsDeadCheck("v8::V8::SetCreateHistogramFunction()")) return;
    i::StatsTable::SetCreateHistogramFunction(callback);
  }
  
  void V8::SetAddHistogramSampleFunction(AddHistogramSampleCallback callback) {
    if (IsDeadCheck("v8::V8::SetAddHistogramSampleFunction()")) return;
    i::StatsTable::SetAddHistogramSampleFunction(callback);
  }
  
  void V8::EnableSlidingStateWindow() {
    if (IsDeadCheck("v8::V8::EnableSlidingStateWindow()")) return;
    i::Logger::EnableSlidingStateWindow();
  }
  
  
  void V8::SetFailedAccessCheckCallbackFunction(
        FailedAccessCheckCallback callback) {
    if (IsDeadCheck("v8::V8::SetFailedAccessCheckCallbackFunction()")) return;
    i::Top::SetFailedAccessCheckCallback(callback);
  }
  
  
  void V8::AddObjectGroup(Persistent<Value>* objects, size_t length) {
    if (IsDeadCheck("v8::V8::AddObjectGroup()")) return;
    STATIC_ASSERT(sizeof(Persistent<Value>) == sizeof(i::Object**));
    i::GlobalHandles::AddGroup(reinterpret_cast<i::Object***>(objects), length);
  }
  
  
  int V8::AdjustAmountOfExternalAllocatedMemory(int change_in_bytes) {
    if (IsDeadCheck("v8::V8::AdjustAmountOfExternalAllocatedMemory()")) return 0;
    return i::Heap::AdjustAmountOfExternalAllocatedMemory(change_in_bytes);
  }
  
  
  void V8::SetGlobalGCPrologueCallback(GCCallback callback) {
    if (IsDeadCheck("v8::V8::SetGlobalGCPrologueCallback()")) return;
    i::Heap::SetGlobalGCPrologueCallback(callback);
  }
  
  
  void V8::SetGlobalGCEpilogueCallback(GCCallback callback) {
    if (IsDeadCheck("v8::V8::SetGlobalGCEpilogueCallback()")) return;
    i::Heap::SetGlobalGCEpilogueCallback(callback);
  }
  
  
  void V8::AddGCPrologueCallback(GCPrologueCallback callback, GCType gc_type) {
    if (IsDeadCheck("v8::V8::AddGCPrologueCallback()")) return;
    i::Heap::AddGCPrologueCallback(callback, gc_type);
  }
  
  
  void V8::RemoveGCPrologueCallback(GCPrologueCallback callback) {
    if (IsDeadCheck("v8::V8::RemoveGCPrologueCallback()")) return;
    i::Heap::RemoveGCPrologueCallback(callback);
  }
  
  
  void V8::AddGCEpilogueCallback(GCEpilogueCallback callback, GCType gc_type) {
    if (IsDeadCheck("v8::V8::AddGCEpilogueCallback()")) return;
    i::Heap::AddGCEpilogueCallback(callback, gc_type);
  }
  
  
  void V8::RemoveGCEpilogueCallback(GCEpilogueCallback callback) {
    if (IsDeadCheck("v8::V8::RemoveGCEpilogueCallback()")) return;
    i::Heap::RemoveGCEpilogueCallback(callback);
  }
  
  
  void V8::AddMemoryAllocationCallback(MemoryAllocationCallback callback,
                                       ObjectSpace space,
                                       AllocationAction action) {
    if (IsDeadCheck("v8::V8::AddMemoryAllocationCallback()")) return;
    i::MemoryAllocator::AddMemoryAllocationCallback(callback,
                                                    space,
                                                    action);
  }
  
  
  void V8::RemoveMemoryAllocationCallback(MemoryAllocationCallback callback) {
    if (IsDeadCheck("v8::V8::RemoveMemoryAllocationCallback()")) return;
    i::MemoryAllocator::RemoveMemoryAllocationCallback(callback);
  }
  
  
  void V8::PauseProfiler() {
  #ifdef ENABLE_LOGGING_AND_PROFILING
    PauseProfilerEx(PROFILER_MODULE_CPU);
  #endif
  }
  
  
  void V8::ResumeProfiler() {
  #ifdef ENABLE_LOGGING_AND_PROFILING
    ResumeProfilerEx(PROFILER_MODULE_CPU);
  #endif
  }
  
  
  bool V8::IsProfilerPaused() {
  #ifdef ENABLE_LOGGING_AND_PROFILING
    return i::Logger::GetActiveProfilerModules() & PROFILER_MODULE_CPU;
  #else
    return true;
  #endif
  }
  
  
  void V8::ResumeProfilerEx(int flags, int tag) {
  #ifdef ENABLE_LOGGING_AND_PROFILING
    if (flags & PROFILER_MODULE_HEAP_SNAPSHOT) {
      // Snapshot mode: resume modules, perform GC, then pause only
      // those modules which haven't been started prior to making a
      // snapshot.
  
      // Make a GC prior to taking a snapshot.
      i::Heap::CollectAllGarbage(false);
      // Reset snapshot flag and CPU module flags.
      flags &= ~(PROFILER_MODULE_HEAP_SNAPSHOT | PROFILER_MODULE_CPU);
      const int current_flags = i::Logger::GetActiveProfilerModules();
      i::Logger::ResumeProfiler(flags, tag);
      i::Heap::CollectAllGarbage(false);
      i::Logger::PauseProfiler(~current_flags & flags, tag);
    } else {
      i::Logger::ResumeProfiler(flags, tag);
    }
  #endif
  }
  
  
  void V8::PauseProfilerEx(int flags, int tag) {
  #ifdef ENABLE_LOGGING_AND_PROFILING
    i::Logger::PauseProfiler(flags, tag);
  #endif
  }
  
  
  int V8::GetActiveProfilerModules() {
  #ifdef ENABLE_LOGGING_AND_PROFILING
    return i::Logger::GetActiveProfilerModules();
  #else
    return PROFILER_MODULE_NONE;
  #endif
  }
  
  
  int V8::GetLogLines(int from_pos, char* dest_buf, int max_size) {
  #ifdef ENABLE_LOGGING_AND_PROFILING
    ASSERT(max_size >= kMinimumSizeForLogLinesBuffer);
    return i::Logger::GetLogLines(from_pos, dest_buf, max_size);
  #endif
    return 0;
  }
  
  
  int V8::GetCurrentThreadId() {
    API_ENTRY_CHECK("V8::GetCurrentThreadId()");
    EnsureInitialized("V8::GetCurrentThreadId()");
    return i::Top::thread_id();
  }
  
  
  void V8::TerminateExecution(int thread_id) {
    if (!i::V8::IsRunning()) return;
    API_ENTRY_CHECK("V8::GetCurrentThreadId()");
    // If the thread_id identifies the current thread just terminate
    // execution right away.  Otherwise, ask the thread manager to
    // terminate the thread with the given id if any.
    if (thread_id == i::Top::thread_id()) {
      i::StackGuard::TerminateExecution();
    } else {
      i::ThreadManager::TerminateExecution(thread_id);
    }
  }
  
  
  void V8::TerminateExecution() {
    if (!i::V8::IsRunning()) return;
    i::StackGuard::TerminateExecution();
  }
  
  
  bool V8::IsExecutionTerminating() {
    if (!i::V8::IsRunning()) return false;
    if (i::Top::has_scheduled_exception()) {
      return i::Top::scheduled_exception() == i::Heap::termination_exception();
    }
    return false;
  }
  
  
  String::Utf8Value::Utf8Value(v8::Handle<v8::Value> obj) {
    EnsureInitialized("v8::String::Utf8Value::Utf8Value()");
    if (obj.IsEmpty()) {
      str_ = NULL;
      length_ = 0;
      return;
    }
    ENTER_V8;
    HandleScope scope;
    TryCatch try_catch;
    Handle<String> str = obj->ToString();
    if (str.IsEmpty()) {
      str_ = NULL;
      length_ = 0;
    } else {
      length_ = str->Utf8Length();
      str_ = i::NewArray<char>(length_ + 1);
      str->WriteUtf8(str_);
    }
  }
  
  
  String::Utf8Value::~Utf8Value() {
    i::DeleteArray(str_);
  }
  
  
  String::AsciiValue::AsciiValue(v8::Handle<v8::Value> obj) {
    EnsureInitialized("v8::String::AsciiValue::AsciiValue()");
    if (obj.IsEmpty()) {
      str_ = NULL;
      length_ = 0;
      return;
    }
    ENTER_V8;
    HandleScope scope;
    TryCatch try_catch;
    Handle<String> str = obj->ToString();
    if (str.IsEmpty()) {
      str_ = NULL;
      length_ = 0;
    } else {
      length_ = str->Length();
      str_ = i::NewArray<char>(length_ + 1);
      str->WriteAscii(str_);
    }
  }
  
  
  String::AsciiValue::~AsciiValue() {
    i::DeleteArray(str_);
  }
  
  
  String::Value::Value(v8::Handle<v8::Value> obj) {
    EnsureInitialized("v8::String::Value::Value()");
    if (obj.IsEmpty()) {
      str_ = NULL;
      length_ = 0;
      return;
    }
    ENTER_V8;
    HandleScope scope;
    TryCatch try_catch;
    Handle<String> str = obj->ToString();
    if (str.IsEmpty()) {
      str_ = NULL;
      length_ = 0;
    } else {
      length_ = str->Length();
      str_ = i::NewArray<uint16_t>(length_ + 1);
      str->Write(str_);
    }
  }
  
  
  String::Value::~Value() {
    i::DeleteArray(str_);
  }
  
  Local<Value> Exception::RangeError(v8::Handle<v8::String> raw_message) {
    LOG_API("RangeError");
    ON_BAILOUT("v8::Exception::RangeError()", return Local<Value>());
    ENTER_V8;
    i::Object* error;
    {
      HandleScope scope;
      i::Handle<i::String> message = Utils::OpenHandle(*raw_message);
      i::Handle<i::Object> result = i::Factory::NewRangeError(message);
      error = *result;
    }
    i::Handle<i::Object> result(error);
    return Utils::ToLocal(result);
  }
  
  Local<Value> Exception::ReferenceError(v8::Handle<v8::String> raw_message) {
    LOG_API("ReferenceError");
    ON_BAILOUT("v8::Exception::ReferenceError()", return Local<Value>());
    ENTER_V8;
    i::Object* error;
    {
      HandleScope scope;
      i::Handle<i::String> message = Utils::OpenHandle(*raw_message);
      i::Handle<i::Object> result = i::Factory::NewReferenceError(message);
      error = *result;
    }
    i::Handle<i::Object> result(error);
    return Utils::ToLocal(result);
  }
  
  Local<Value> Exception::SyntaxError(v8::Handle<v8::String> raw_message) {
    LOG_API("SyntaxError");
    ON_BAILOUT("v8::Exception::SyntaxError()", return Local<Value>());
    ENTER_V8;
    i::Object* error;
    {
      HandleScope scope;
      i::Handle<i::String> message = Utils::OpenHandle(*raw_message);
      i::Handle<i::Object> result = i::Factory::NewSyntaxError(message);
      error = *result;
    }
    i::Handle<i::Object> result(error);
    return Utils::ToLocal(result);
  }
  
  Local<Value> Exception::TypeError(v8::Handle<v8::String> raw_message) {
    LOG_API("TypeError");
    ON_BAILOUT("v8::Exception::TypeError()", return Local<Value>());
    ENTER_V8;
    i::Object* error;
    {
      HandleScope scope;
      i::Handle<i::String> message = Utils::OpenHandle(*raw_message);
      i::Handle<i::Object> result = i::Factory::NewTypeError(message);
      error = *result;
    }
    i::Handle<i::Object> result(error);
    return Utils::ToLocal(result);
  }
  
  Local<Value> Exception::Error(v8::Handle<v8::String> raw_message) {
    LOG_API("Error");
    ON_BAILOUT("v8::Exception::Error()", return Local<Value>());
    ENTER_V8;
    i::Object* error;
    {
      HandleScope scope;
      i::Handle<i::String> message = Utils::OpenHandle(*raw_message);
      i::Handle<i::Object> result = i::Factory::NewError(message);
      error = *result;
    }
    i::Handle<i::Object> result(error);
    return Utils::ToLocal(result);
  }
  
  
  // --- D e b u g   S u p p o r t ---
  
  #ifdef ENABLE_DEBUGGER_SUPPORT
  
  static v8::Debug::EventCallback event_callback = NULL;
  
  static void EventCallbackWrapper(const v8::Debug::EventDetails& event_details) {
    if (event_callback) {
      event_callback(event_details.GetEvent(),
                     event_details.GetExecutionState(),
                     event_details.GetEventData(),
                     event_details.GetCallbackData());
    }
  }
  
  
  bool Debug::SetDebugEventListener(EventCallback that, Handle<Value> data) {
    EnsureInitialized("v8::Debug::SetDebugEventListener()");
    ON_BAILOUT("v8::Debug::SetDebugEventListener()", return false);
    ENTER_V8;
  
    event_callback = that;
  
    HandleScope scope;
    i::Handle<i::Object> proxy = i::Factory::undefined_value();
    if (that != NULL) {
      proxy = i::Factory::NewProxy(FUNCTION_ADDR(EventCallbackWrapper));
    }
    i::Debugger::SetEventListener(proxy, Utils::OpenHandle(*data));
    return true;
  }
  
  
  bool Debug::SetDebugEventListener2(EventCallback2 that, Handle<Value> data) {
    EnsureInitialized("v8::Debug::SetDebugEventListener2()");
    ON_BAILOUT("v8::Debug::SetDebugEventListener2()", return false);
    ENTER_V8;
    HandleScope scope;
    i::Handle<i::Object> proxy = i::Factory::undefined_value();
    if (that != NULL) {
      proxy = i::Factory::NewProxy(FUNCTION_ADDR(that));
    }
    i::Debugger::SetEventListener(proxy, Utils::OpenHandle(*data));
    return true;
  }
  
  
  bool Debug::SetDebugEventListener(v8::Handle<v8::Object> that,
                                    Handle<Value> data) {
    ON_BAILOUT("v8::Debug::SetDebugEventListener()", return false);
    ENTER_V8;
    i::Debugger::SetEventListener(Utils::OpenHandle(*that),
                                  Utils::OpenHandle(*data));
    return true;
  }
  
  
  void Debug::DebugBreak() {
    if (!i::V8::IsRunning()) return;
    i::StackGuard::DebugBreak();
  }
  
  
  void Debug::CancelDebugBreak() {
    i::StackGuard::Continue(i::DEBUGBREAK);
  }
  
  
  void Debug::DebugBreakForCommand(ClientData* data) {
    if (!i::V8::IsRunning()) return;
    i::Debugger::EnqueueDebugCommand(data);
  }
  
  
  static v8::Debug::MessageHandler message_handler = NULL;
  
  static void MessageHandlerWrapper(const v8::Debug::Message& message) {
    if (message_handler) {
      v8::String::Value json(message.GetJSON());
      message_handler(*json, json.length(), message.GetClientData());
    }
  }
  
  
  void Debug::SetMessageHandler(v8::Debug::MessageHandler handler,
                                bool message_handler_thread) {
    EnsureInitialized("v8::Debug::SetMessageHandler");
    ENTER_V8;
    // Message handler thread not supported any more. Parameter temporally left in
    // the API for client compatability reasons.
    CHECK(!message_handler_thread);
  
    // TODO(sgjesse) support the old message handler API through a simple wrapper.
    message_handler = handler;
    if (message_handler != NULL) {
      i::Debugger::SetMessageHandler(MessageHandlerWrapper);
    } else {
      i::Debugger::SetMessageHandler(NULL);
    }
  }
  
  
  void Debug::SetMessageHandler2(v8::Debug::MessageHandler2 handler) {
    EnsureInitialized("v8::Debug::SetMessageHandler");
    ENTER_V8;
    i::Debugger::SetMessageHandler(handler);
  }
  
  
  void Debug::SendCommand(const uint16_t* command, int length,
                          ClientData* client_data) {
    if (!i::V8::IsRunning()) return;
    i::Debugger::ProcessCommand(i::Vector<const uint16_t>(command, length),
                                client_data);
  }
  
  
  void Debug::SetHostDispatchHandler(HostDispatchHandler handler,
                                     int period) {
    EnsureInitialized("v8::Debug::SetHostDispatchHandler");
    ENTER_V8;
    i::Debugger::SetHostDispatchHandler(handler, period);
  }
  
  
  void Debug::SetDebugMessageDispatchHandler(
      DebugMessageDispatchHandler handler, bool provide_locker) {
    EnsureInitialized("v8::Debug::SetDebugMessageDispatchHandler");
    ENTER_V8;
    i::Debugger::SetDebugMessageDispatchHandler(handler, provide_locker);
  }
  
  
  Local<Value> Debug::Call(v8::Handle<v8::Function> fun,
                           v8::Handle<v8::Value> data) {
    if (!i::V8::IsRunning()) return Local<Value>();
    ON_BAILOUT("v8::Debug::Call()", return Local<Value>());
    ENTER_V8;
    i::Handle<i::Object> result;
    EXCEPTION_PREAMBLE();
    if (data.IsEmpty()) {
      result = i::Debugger::Call(Utils::OpenHandle(*fun),
                                 i::Factory::undefined_value(),
                                 &has_pending_exception);
    } else {
      result = i::Debugger::Call(Utils::OpenHandle(*fun),
                                 Utils::OpenHandle(*data),
                                 &has_pending_exception);
    }
    EXCEPTION_BAILOUT_CHECK(Local<Value>());
    return Utils::ToLocal(result);
  }
  
  
  Local<Value> Debug::GetMirror(v8::Handle<v8::Value> obj) {
    if (!i::V8::IsRunning()) return Local<Value>();
    ON_BAILOUT("v8::Debug::GetMirror()", return Local<Value>());
    ENTER_V8;
    v8::HandleScope scope;
    i::Debug::Load();
    i::Handle<i::JSObject> debug(i::Debug::debug_context()->global());
    i::Handle<i::String> name = i::Factory::LookupAsciiSymbol("MakeMirror");
    i::Handle<i::Object> fun_obj = i::GetProperty(debug, name);
    i::Handle<i::JSFunction> fun = i::Handle<i::JSFunction>::cast(fun_obj);
    v8::Handle<v8::Function> v8_fun = Utils::ToLocal(fun);
    const int kArgc = 1;
    v8::Handle<v8::Value> argv[kArgc] = { obj };
    EXCEPTION_PREAMBLE();
    v8::Handle<v8::Value> result = v8_fun->Call(Utils::ToLocal(debug),
                                                kArgc,
                                                argv);
    EXCEPTION_BAILOUT_CHECK(Local<Value>());
    return scope.Close(result);
  }
  
  
  bool Debug::EnableAgent(const char* name, int port, bool wait_for_connection) {
    return i::Debugger::StartAgent(name, port, wait_for_connection);
  }
  
  void Debug::ProcessDebugMessages() {
    i::Execution::ProcessDebugMesssages(true);
  }
  
  Local<Context> Debug::GetDebugContext() {
    EnsureInitialized("v8::Debug::GetDebugContext()");
    ENTER_V8;
    return Utils::ToLocal(i::Debugger::GetDebugContext());
  }
  
  #endif  // ENABLE_DEBUGGER_SUPPORT
  
  
  #ifdef ENABLE_LOGGING_AND_PROFILING
  
  Handle<String> CpuProfileNode::GetFunctionName() const {
    IsDeadCheck("v8::CpuProfileNode::GetFunctionName");
    const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
    const i::CodeEntry* entry = node->entry();
    if (!entry->has_name_prefix()) {
      return Handle<String>(ToApi<String>(
          i::Factory::LookupAsciiSymbol(entry->name())));
    } else {
      return Handle<String>(ToApi<String>(i::Factory::NewConsString(
          i::Factory::LookupAsciiSymbol(entry->name_prefix()),
          i::Factory::LookupAsciiSymbol(entry->name()))));
    }
  }
  
  
  Handle<String> CpuProfileNode::GetScriptResourceName() const {
    IsDeadCheck("v8::CpuProfileNode::GetScriptResourceName");
    const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
    return Handle<String>(ToApi<String>(i::Factory::LookupAsciiSymbol(
        node->entry()->resource_name())));
  }
  
  
  int CpuProfileNode::GetLineNumber() const {
    IsDeadCheck("v8::CpuProfileNode::GetLineNumber");
    return reinterpret_cast<const i::ProfileNode*>(this)->entry()->line_number();
  }
  
  
  double CpuProfileNode::GetTotalTime() const {
    IsDeadCheck("v8::CpuProfileNode::GetTotalTime");
    return reinterpret_cast<const i::ProfileNode*>(this)->GetTotalMillis();
  }
  
  
  double CpuProfileNode::GetSelfTime() const {
    IsDeadCheck("v8::CpuProfileNode::GetSelfTime");
    return reinterpret_cast<const i::ProfileNode*>(this)->GetSelfMillis();
  }
  
  
  double CpuProfileNode::GetTotalSamplesCount() const {
    IsDeadCheck("v8::CpuProfileNode::GetTotalSamplesCount");
    return reinterpret_cast<const i::ProfileNode*>(this)->total_ticks();
  }
  
  
  double CpuProfileNode::GetSelfSamplesCount() const {
    IsDeadCheck("v8::CpuProfileNode::GetSelfSamplesCount");
    return reinterpret_cast<const i::ProfileNode*>(this)->self_ticks();
  }
  
  
  unsigned CpuProfileNode::GetCallUid() const {
    IsDeadCheck("v8::CpuProfileNode::GetCallUid");
    return reinterpret_cast<const i::ProfileNode*>(this)->entry()->GetCallUid();
  }
  
  
  int CpuProfileNode::GetChildrenCount() const {
    IsDeadCheck("v8::CpuProfileNode::GetChildrenCount");
    return reinterpret_cast<const i::ProfileNode*>(this)->children()->length();
  }
  
  
  const CpuProfileNode* CpuProfileNode::GetChild(int index) const {
    IsDeadCheck("v8::CpuProfileNode::GetChild");
    const i::ProfileNode* child =
        reinterpret_cast<const i::ProfileNode*>(this)->children()->at(index);
    return reinterpret_cast<const CpuProfileNode*>(child);
  }
  
  
  unsigned CpuProfile::GetUid() const {
    IsDeadCheck("v8::CpuProfile::GetUid");
    return reinterpret_cast<const i::CpuProfile*>(this)->uid();
  }
  
  
  Handle<String> CpuProfile::GetTitle() const {
    IsDeadCheck("v8::CpuProfile::GetTitle");
    const i::CpuProfile* profile = reinterpret_cast<const i::CpuProfile*>(this);
    return Handle<String>(ToApi<String>(i::Factory::LookupAsciiSymbol(
        profile->title())));
  }
  
  
  const CpuProfileNode* CpuProfile::GetBottomUpRoot() const {
    IsDeadCheck("v8::CpuProfile::GetBottomUpRoot");
    const i::CpuProfile* profile = reinterpret_cast<const i::CpuProfile*>(this);
    return reinterpret_cast<const CpuProfileNode*>(profile->bottom_up()->root());
  }
  
  
  const CpuProfileNode* CpuProfile::GetTopDownRoot() const {
    IsDeadCheck("v8::CpuProfile::GetTopDownRoot");
    const i::CpuProfile* profile = reinterpret_cast<const i::CpuProfile*>(this);
    return reinterpret_cast<const CpuProfileNode*>(profile->top_down()->root());
  }
  
  
  int CpuProfiler::GetProfilesCount() {
    IsDeadCheck("v8::CpuProfiler::GetProfilesCount");
    return i::CpuProfiler::GetProfilesCount();
  }
  
  
  const CpuProfile* CpuProfiler::GetProfile(int index,
                                            Handle<Value> security_token) {
    IsDeadCheck("v8::CpuProfiler::GetProfile");
    return reinterpret_cast<const CpuProfile*>(
        i::CpuProfiler::GetProfile(
            security_token.IsEmpty() ? NULL : *Utils::OpenHandle(*security_token),
            index));
  }
  
  
  const CpuProfile* CpuProfiler::FindProfile(unsigned uid,
                                             Handle<Value> security_token) {
    IsDeadCheck("v8::CpuProfiler::FindProfile");
    return reinterpret_cast<const CpuProfile*>(
        i::CpuProfiler::FindProfile(
            security_token.IsEmpty() ? NULL : *Utils::OpenHandle(*security_token),
            uid));
  }
  
  
  void CpuProfiler::StartProfiling(Handle<String> title) {
    IsDeadCheck("v8::CpuProfiler::StartProfiling");
    i::CpuProfiler::StartProfiling(*Utils::OpenHandle(*title));
  }
  
  
  const CpuProfile* CpuProfiler::StopProfiling(Handle<String> title,
                                               Handle<Value> security_token) {
    IsDeadCheck("v8::CpuProfiler::StopProfiling");
    return reinterpret_cast<const CpuProfile*>(
        i::CpuProfiler::StopProfiling(
            security_token.IsEmpty() ? NULL : *Utils::OpenHandle(*security_token),
            *Utils::OpenHandle(*title)));
  }
  
  
  static i::HeapGraphEdge* ToInternal(const HeapGraphEdge* edge) {
    return const_cast<i::HeapGraphEdge*>(
        reinterpret_cast<const i::HeapGraphEdge*>(edge));
  }
  
  HeapGraphEdge::Type HeapGraphEdge::GetType() const {
    IsDeadCheck("v8::HeapGraphEdge::GetType");
    return static_cast<HeapGraphEdge::Type>(ToInternal(this)->type());
  }
  
  
  Handle<Value> HeapGraphEdge::GetName() const {
    IsDeadCheck("v8::HeapGraphEdge::GetName");
    i::HeapGraphEdge* edge = ToInternal(this);
    switch (edge->type()) {
      case i::HeapGraphEdge::kContextVariable:
      case i::HeapGraphEdge::kInternal:
      case i::HeapGraphEdge::kProperty:
      case i::HeapGraphEdge::kShortcut:
        return Handle<String>(ToApi<String>(i::Factory::LookupAsciiSymbol(
            edge->name())));
      case i::HeapGraphEdge::kElement:
      case i::HeapGraphEdge::kHidden:
        return Handle<Number>(ToApi<Number>(i::Factory::NewNumberFromInt(
            edge->index())));
      default: UNREACHABLE();
    }
    return ImplementationUtilities::Undefined();
  }
  
  
  const HeapGraphNode* HeapGraphEdge::GetFromNode() const {
    IsDeadCheck("v8::HeapGraphEdge::GetFromNode");
    const i::HeapEntry* from = ToInternal(this)->From();
    return reinterpret_cast<const HeapGraphNode*>(from);
  }
  
  
  const HeapGraphNode* HeapGraphEdge::GetToNode() const {
    IsDeadCheck("v8::HeapGraphEdge::GetToNode");
    const i::HeapEntry* to = ToInternal(this)->to();
    return reinterpret_cast<const HeapGraphNode*>(to);
  }
  
  
  static i::HeapGraphPath* ToInternal(const HeapGraphPath* path) {
    return const_cast<i::HeapGraphPath*>(
        reinterpret_cast<const i::HeapGraphPath*>(path));
  }
  
  
  int HeapGraphPath::GetEdgesCount() const {
    return ToInternal(this)->path()->length();
  }
  
  
  const HeapGraphEdge* HeapGraphPath::GetEdge(int index) const {
    return reinterpret_cast<const HeapGraphEdge*>(
        ToInternal(this)->path()->at(index));
  }
  
  
  const HeapGraphNode* HeapGraphPath::GetFromNode() const {
    return GetEdgesCount() > 0 ? GetEdge(0)->GetFromNode() : NULL;
  }
  
  
  const HeapGraphNode* HeapGraphPath::GetToNode() const {
    const int count = GetEdgesCount();
    return count > 0 ? GetEdge(count - 1)->GetToNode() : NULL;
  }
  
  
  static i::HeapEntry* ToInternal(const HeapGraphNode* entry) {
    return const_cast<i::HeapEntry*>(
        reinterpret_cast<const i::HeapEntry*>(entry));
  }
  
  
  HeapGraphNode::Type HeapGraphNode::GetType() const {
    IsDeadCheck("v8::HeapGraphNode::GetType");
    return static_cast<HeapGraphNode::Type>(ToInternal(this)->type());
  }
  
  
  Handle<String> HeapGraphNode::GetName() const {
    IsDeadCheck("v8::HeapGraphNode::GetName");
    return Handle<String>(ToApi<String>(i::Factory::LookupAsciiSymbol(
        ToInternal(this)->name())));
  }
  
  
  uint64_t HeapGraphNode::GetId() const {
    IsDeadCheck("v8::HeapGraphNode::GetId");
    ASSERT(ToInternal(this)->snapshot()->type() != i::HeapSnapshot::kAggregated);
    return ToInternal(this)->id();
  }
  
  
  int HeapGraphNode::GetInstancesCount() const {
    IsDeadCheck("v8::HeapGraphNode::GetInstancesCount");
    ASSERT(ToInternal(this)->snapshot()->type() == i::HeapSnapshot::kAggregated);
    return static_cast<int>(ToInternal(this)->id());
  }
  
  
  int HeapGraphNode::GetSelfSize() const {
    IsDeadCheck("v8::HeapGraphNode::GetSelfSize");
    return ToInternal(this)->self_size();
  }
  
  
  int HeapGraphNode::GetRetainedSize(bool exact) const {
    IsDeadCheck("v8::HeapSnapshot::GetRetainedSize");
    return ToInternal(this)->RetainedSize(exact);
  }
  
  
  int HeapGraphNode::GetChildrenCount() const {
    IsDeadCheck("v8::HeapSnapshot::GetChildrenCount");
    return ToInternal(this)->children().length();
  }
  
  
  const HeapGraphEdge* HeapGraphNode::GetChild(int index) const {
    IsDeadCheck("v8::HeapSnapshot::GetChild");
    return reinterpret_cast<const HeapGraphEdge*>(
        &ToInternal(this)->children()[index]);
  }
  
  
  int HeapGraphNode::GetRetainersCount() const {
    IsDeadCheck("v8::HeapSnapshot::GetRetainersCount");
    return ToInternal(this)->retainers().length();
  }
  
  
  const HeapGraphEdge* HeapGraphNode::GetRetainer(int index) const {
    IsDeadCheck("v8::HeapSnapshot::GetRetainer");
    return reinterpret_cast<const HeapGraphEdge*>(
        ToInternal(this)->retainers()[index]);
  }
  
  
  int HeapGraphNode::GetRetainingPathsCount() const {
    IsDeadCheck("v8::HeapSnapshot::GetRetainingPathsCount");
    return ToInternal(this)->GetRetainingPaths()->length();
  }
  
  
  const HeapGraphPath* HeapGraphNode::GetRetainingPath(int index) const {
    IsDeadCheck("v8::HeapSnapshot::GetRetainingPath");
    return reinterpret_cast<const HeapGraphPath*>(
        ToInternal(this)->GetRetainingPaths()->at(index));
  }
  
  
  const HeapGraphNode* HeapGraphNode::GetDominatorNode() const {
    IsDeadCheck("v8::HeapSnapshot::GetDominatorNode");
    return reinterpret_cast<const HeapGraphNode*>(ToInternal(this)->dominator());
  }
  
  
  const HeapGraphNode* HeapSnapshotsDiff::GetAdditionsRoot() const {
    IsDeadCheck("v8::HeapSnapshotsDiff::GetAdditionsRoot");
    i::HeapSnapshotsDiff* diff =
        const_cast<i::HeapSnapshotsDiff*>(
            reinterpret_cast<const i::HeapSnapshotsDiff*>(this));
    return reinterpret_cast<const HeapGraphNode*>(diff->additions_root());
  }
  
  
  const HeapGraphNode* HeapSnapshotsDiff::GetDeletionsRoot() const {
    IsDeadCheck("v8::HeapSnapshotsDiff::GetDeletionsRoot");
    i::HeapSnapshotsDiff* diff =
        const_cast<i::HeapSnapshotsDiff*>(
            reinterpret_cast<const i::HeapSnapshotsDiff*>(this));
    return reinterpret_cast<const HeapGraphNode*>(diff->deletions_root());
  }
  
  
  static i::HeapSnapshot* ToInternal(const HeapSnapshot* snapshot) {
    return const_cast<i::HeapSnapshot*>(
        reinterpret_cast<const i::HeapSnapshot*>(snapshot));
  }
  
  
  HeapSnapshot::Type HeapSnapshot::GetType() const {
    IsDeadCheck("v8::HeapSnapshot::GetType");
    return static_cast<HeapSnapshot::Type>(ToInternal(this)->type());
  }
  
  
  unsigned HeapSnapshot::GetUid() const {
    IsDeadCheck("v8::HeapSnapshot::GetUid");
    return ToInternal(this)->uid();
  }
  
  
  Handle<String> HeapSnapshot::GetTitle() const {
    IsDeadCheck("v8::HeapSnapshot::GetTitle");
    return Handle<String>(ToApi<String>(i::Factory::LookupAsciiSymbol(
        ToInternal(this)->title())));
  }
  
  
  const HeapGraphNode* HeapSnapshot::GetRoot() const {
    IsDeadCheck("v8::HeapSnapshot::GetHead");
    return reinterpret_cast<const HeapGraphNode*>(ToInternal(this)->root());
  }
  
  
  const HeapGraphNode* HeapSnapshot::GetNodeById(uint64_t id) const {
    IsDeadCheck("v8::HeapSnapshot::GetNodeById");
    return reinterpret_cast<const HeapGraphNode*>(
        ToInternal(this)->GetEntryById(id));
  }
  
  
  const HeapSnapshotsDiff* HeapSnapshot::CompareWith(
      const HeapSnapshot* snapshot) const {
    IsDeadCheck("v8::HeapSnapshot::CompareWith");
    return reinterpret_cast<const HeapSnapshotsDiff*>(
        ToInternal(this)->CompareWith(ToInternal(snapshot)));
  }
  
  
  void HeapSnapshot::Serialize(OutputStream* stream,
                               HeapSnapshot::SerializationFormat format) const {
    IsDeadCheck("v8::HeapSnapshot::Serialize");
    ApiCheck(format == kJSON,
             "v8::HeapSnapshot::Serialize",
             "Unknown serialization format");
    ApiCheck(stream->GetOutputEncoding() == OutputStream::kAscii,
             "v8::HeapSnapshot::Serialize",
             "Unsupported output encoding");
    ApiCheck(stream->GetChunkSize() > 0,
             "v8::HeapSnapshot::Serialize",
             "Invalid stream chunk size");
    i::HeapSnapshotJSONSerializer serializer(ToInternal(this));
    serializer.Serialize(stream);
  }
  
  
  int HeapProfiler::GetSnapshotsCount() {
    IsDeadCheck("v8::HeapProfiler::GetSnapshotsCount");
    return i::HeapProfiler::GetSnapshotsCount();
  }
  
  
  const HeapSnapshot* HeapProfiler::GetSnapshot(int index) {
    IsDeadCheck("v8::HeapProfiler::GetSnapshot");
    return reinterpret_cast<const HeapSnapshot*>(
        i::HeapProfiler::GetSnapshot(index));
  }
  
  
  const HeapSnapshot* HeapProfiler::FindSnapshot(unsigned uid) {
    IsDeadCheck("v8::HeapProfiler::FindSnapshot");
    return reinterpret_cast<const HeapSnapshot*>(
        i::HeapProfiler::FindSnapshot(uid));
  }
  
  
  const HeapSnapshot* HeapProfiler::TakeSnapshot(Handle<String> title,
                                                 HeapSnapshot::Type type,
                                                 ActivityControl* control) {
    IsDeadCheck("v8::HeapProfiler::TakeSnapshot");
    i::HeapSnapshot::Type internal_type = i::HeapSnapshot::kFull;
    switch (type) {
      case HeapSnapshot::kFull:
        internal_type = i::HeapSnapshot::kFull;
        break;
      case HeapSnapshot::kAggregated:
        internal_type = i::HeapSnapshot::kAggregated;
        break;
      default:
        UNREACHABLE();
    }
    return reinterpret_cast<const HeapSnapshot*>(
        i::HeapProfiler::TakeSnapshot(
            *Utils::OpenHandle(*title), internal_type, control));
  }
  
  #endif  // ENABLE_LOGGING_AND_PROFILING
  
  
  v8::Testing::StressType internal::Testing::stress_type_ =
      v8::Testing::kStressTypeOpt;
  
  
  void Testing::SetStressRunType(Testing::StressType type) {
    internal::Testing::set_stress_type(type);
  }
  
  int Testing::GetStressRuns() {
    if (internal::FLAG_stress_runs != 0) return internal::FLAG_stress_runs;
  #ifdef DEBUG
    // In debug mode the code runs much slower so stressing will only make two
    // runs.
    return 2;
  #else
    return 5;
  #endif
  }
  
  
  static void SetFlagsFromString(const char* flags) {
    V8::SetFlagsFromString(flags, i::StrLength(flags));
  }
  
  
  void Testing::PrepareStressRun(int run) {
    static const char* kLazyOptimizations =
        "--prepare-always-opt --nolimit-inlining "
        "--noalways-opt --noopt-eagerly";
    static const char* kEagerOptimizations = "--opt-eagerly";
    static const char* kForcedOptimizations = "--always-opt";
  
    // If deoptimization stressed turn on frequent deoptimization. If no value
    // is spefified through --deopt-every-n-times use a default default value.
    static const char* kDeoptEvery13Times = "--deopt-every-n-times=13";
    if (internal::Testing::stress_type() == Testing::kStressTypeDeopt &&
        internal::FLAG_deopt_every_n_times == 0) {
      SetFlagsFromString(kDeoptEvery13Times);
    }
  
  #ifdef DEBUG
    // As stressing in debug mode only make two runs skip the deopt stressing
    // here.
    if (run == GetStressRuns() - 1) {
      SetFlagsFromString(kForcedOptimizations);
    } else {
      SetFlagsFromString(kEagerOptimizations);
      SetFlagsFromString(kLazyOptimizations);
    }
  #else
    if (run == GetStressRuns() - 1) {
      SetFlagsFromString(kForcedOptimizations);
    } else if (run == GetStressRuns() - 2) {
      SetFlagsFromString(kEagerOptimizations);
    } else {
      SetFlagsFromString(kLazyOptimizations);
    }
  #endif
  }
  
  
  namespace internal {
  
  
  HandleScopeImplementer* HandleScopeImplementer::instance() {
    return &thread_local;
  }
  
  
  void HandleScopeImplementer::FreeThreadResources() {
    thread_local.Free();
  }
  
  
  char* HandleScopeImplementer::ArchiveThread(char* storage) {
    return thread_local.ArchiveThreadHelper(storage);
  }
  
  
  char* HandleScopeImplementer::ArchiveThreadHelper(char* storage) {
    v8::ImplementationUtilities::HandleScopeData* current =
        v8::ImplementationUtilities::CurrentHandleScope();
    handle_scope_data_ = *current;
    memcpy(storage, this, sizeof(*this));
  
    ResetAfterArchive();
    current->Initialize();
  
    return storage + ArchiveSpacePerThread();
  }
  
  
  int HandleScopeImplementer::ArchiveSpacePerThread() {
    return sizeof(thread_local);
  }
  
  
  char* HandleScopeImplementer::RestoreThread(char* storage) {
    return thread_local.RestoreThreadHelper(storage);
  }
  
  
  char* HandleScopeImplementer::RestoreThreadHelper(char* storage) {
    memcpy(this, storage, sizeof(*this));
    *v8::ImplementationUtilities::CurrentHandleScope() = handle_scope_data_;
    return storage + ArchiveSpacePerThread();
  }
  
  
  void HandleScopeImplementer::IterateThis(ObjectVisitor* v) {
    // Iterate over all handles in the blocks except for the last.
    for (int i = blocks()->length() - 2; i >= 0; --i) {
      Object** block = blocks()->at(i);
      v->VisitPointers(block, &block[kHandleBlockSize]);
    }
  
    // Iterate over live handles in the last block (if any).
    if (!blocks()->is_empty()) {
      v->VisitPointers(blocks()->last(), handle_scope_data_.next);
    }
  
    if (!saved_contexts_.is_empty()) {
      Object** start = reinterpret_cast<Object**>(&saved_contexts_.first());
      v->VisitPointers(start, start + saved_contexts_.length());
    }
  }
  
  
  void HandleScopeImplementer::Iterate(ObjectVisitor* v) {
    v8::ImplementationUtilities::HandleScopeData* current =
        v8::ImplementationUtilities::CurrentHandleScope();
    thread_local.handle_scope_data_ = *current;
    thread_local.IterateThis(v);
  }
  
  
  char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
    HandleScopeImplementer* thread_local =
        reinterpret_cast<HandleScopeImplementer*>(storage);
    thread_local->IterateThis(v);
    return storage + ArchiveSpacePerThread();
  }
  
  } }  // namespace v8::internal
  