api.cc

// Copyright 2009 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 "execution.h"
#include "global-handles.h"
#include "platform.h"
#include "serialize.h"
#include "snapshot.h"
#include "v8threads.h"
#include "version.h"


#define LOG_API(expr) LOG(ApiEntryCall(expr))

#ifdef ENABLE_HEAP_PROTECTION
#define ENTER_V8 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)) {                  \
    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;
int i::Internals::kJSObjectType = JS_OBJECT_TYPE;
int i::Internals::kFirstNonstringType = FIRST_NONSTRING_TYPE;
int i::Internals::kProxyType = PROXY_TYPE;

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;
}



// 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) {
  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),
    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();
  if (young_space_size != 0 || old_gen_size != 0) {
    bool result = i::Heap::ConfigureHeap(young_space_size / 2, old_gen_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;
  if ((*obj)->IsGlobalContext()) i::Heap::NotifyContextDisposed();
  i::GlobalHandles::Destroy(obj);
}

// --- H a n d l e s ---


HandleScope::HandleScope() : is_closed_(false) {
  API_ENTRY_CHECK("HandleScope::HandleScope");
  i::HandleScope::Enter(&previous_);
}


HandleScope::~HandleScope() {
  if (!is_closed_) {
    i::HandleScope::Leave(&previous_);
  }
}


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<Value> 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 = *value;
  is_closed_ = true;
  i::HandleScope::Leave(&previous_);

  // 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;
}


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);
  obj->set_callback(*FromCData(callback));
  if (data.IsEmpty()) data = v8::Undefined();
  obj->set_data(*Utils::OpenHandle(*data));
  Utils::OpenHandle(this)->set_call_code(*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 = i::Factory::NewAccessorInfo();
  ASSERT(getter != NULL);
  obj->set_getter(*FromCData(getter));
  obj->set_setter(*FromCData(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));

  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) obj->set_getter(*FromCData(getter));
  if (setter != 0) obj->set_setter(*FromCData(setter));
  if (query != 0) obj->set_query(*FromCData(query));
  if (remover != 0) obj->set_deleter(*FromCData(remover));
  if (enumerator != 0) obj->set_enumerator(*FromCData(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) obj->set_getter(*FromCData(getter));
  if (setter != 0) obj->set_setter(*FromCData(setter));
  if (query != 0) obj->set_query(*FromCData(query));
  if (remover != 0) obj->set_deleter(*FromCData(remover));
  if (enumerator != 0) obj->set_enumerator(*FromCData(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);
  obj->set_callback(*FromCData(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);
  info->set_named_callback(*FromCData(named_callback));
  info->set_indexed_callback(*FromCData(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,