/work/obj-fuzz/dom/bindings/MessageEventBinding.cpp

Source (jump to first uncovered line)
/* THIS FILE IS AUTOGENERATED FROM MessageEvent.webidl BY Codegen.py - DO NOT EDIT */

#include "AtomList.h"
#include "EventBinding.h"
#include "MessageEventBinding.h"
#include "WrapperFactory.h"
#include "XrayWrapper.h"
#include "mozilla/OwningNonNull.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/DOMJSClass.h"
#include "mozilla/dom/MessageEvent.h"
#include "mozilla/dom/MessagePort.h"
#include "mozilla/dom/NonRefcountedDOMObject.h"
#include "mozilla/dom/Nullable.h"
#include "mozilla/dom/PrimitiveConversions.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/ServiceWorker.h"
#include "mozilla/dom/UnionConversions.h"
#include "mozilla/dom/XrayExpandoClass.h"
#include "nsPIDOMWindow.h"

namespace mozilla {
namespace dom {

namespace binding_detail {}; // Just to make sure it's known as a namespace
using namespace mozilla::dom::binding_detail;


void
ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback, OwningWindowProxyOrMessagePortOrServiceWorker& aUnion, const char* aName, uint32_t aFlags)
{
  if (aUnion.IsWindowProxy()) {
    ImplCycleCollectionTraverse(aCallback, aUnion.GetAsWindowProxy(), "mWindowProxy", aFlags);
  } else if (aUnion.IsMessagePort()) {
    ImplCycleCollectionTraverse(aCallback, aUnion.GetAsMessagePort(), "mMessagePort", aFlags);
  } else if (aUnion.IsServiceWorker()) {
    ImplCycleCollectionTraverse(aCallback, aUnion.GetAsServiceWorker(), "mServiceWorker", aFlags);
  }
}


void
ImplCycleCollectionUnlink(OwningWindowProxyOrMessagePortOrServiceWorker& aUnion)
{
  aUnion.Uninit();
}


bool
WindowProxyOrMessagePortOrServiceWorker::ToJSVal(JSContext* cx, JS::Handle<JSObject*> scopeObj, JS::MutableHandle<JS::Value> rval) const
{
  switch (mType) {
    case eUninitialized: {
      return false;
      break;
    }
    case eWindowProxy: {
      if (!WrapObject(cx, mValue.mWindowProxy.Value(), rval)) {
        return false;
      }
      return true;
      break;
    }
    case eMessagePort: {
      if (!GetOrCreateDOMReflector(cx, mValue.mMessagePort.Value(), rval)) {
        MOZ_ASSERT(JS_IsExceptionPending(cx));
        return false;
      }
      return true;
      break;
    }
    case eServiceWorker: {
      if (!GetOrCreateDOMReflector(cx, mValue.mServiceWorker.Value(), rval)) {
        MOZ_ASSERT(JS_IsExceptionPending(cx));
        return false;
      }
      return true;
      break;
    }
    default: {
      return false;
      break;
    }
  }

  return false;
}


RefPtr<nsPIDOMWindowOuter>&
OwningWindowProxyOrMessagePortOrServiceWorker::RawSetAsWindowProxy()
{
  if (mType == eWindowProxy) {
    return mValue.mWindowProxy.Value();
  }
  MOZ_ASSERT(mType == eUninitialized);
  mType = eWindowProxy;
  return mValue.mWindowProxy.SetValue();
}

RefPtr<nsPIDOMWindowOuter>&
OwningWindowProxyOrMessagePortOrServiceWorker::SetAsWindowProxy()
{
  if (mType == eWindowProxy) {
    return mValue.mWindowProxy.Value();
  }
  Uninit();
  mType = eWindowProxy;
  return mValue.mWindowProxy.SetValue();
}

bool
OwningWindowProxyOrMessagePortOrServiceWorker::TrySetToWindowProxy(JSContext* cx, JS::Handle<JS::Value> value, bool& tryNext, bool passedToJSImpl)
{
  tryNext = false;
  { // scope for memberSlot
    RefPtr<nsPIDOMWindowOuter>& memberSlot = RawSetAsWindowProxy();
    static_assert(IsRefcounted<nsPIDOMWindowOuter>::value, "We can only store refcounted classes.");RefPtr<nsPIDOMWindowOuter> mWindowProxyHolder;
    JS::Rooted<JSObject*> source(cx, &value.toObject());
    if (NS_FAILED(UnwrapArg<nsPIDOMWindowOuter>(cx, source, getter_AddRefs(mWindowProxyHolder)))) {
      DestroyWindowProxy();
      tryNext = true;
      return true;
    }
    MOZ_ASSERT(mWindowProxyHolder);
    memberSlot = mWindowProxyHolder;
  }
  return true;
}

void
OwningWindowProxyOrMessagePortOrServiceWorker::DestroyWindowProxy()
{
  MOZ_ASSERT(IsWindowProxy(), "Wrong type!");
  mValue.mWindowProxy.Destroy();
  mType = eUninitialized;
}




OwningNonNull<mozilla::dom::MessagePort>&
OwningWindowProxyOrMessagePortOrServiceWorker::RawSetAsMessagePort()
{
  if (mType == eMessagePort) {
    return mValue.mMessagePort.Value();
  }
  MOZ_ASSERT(mType == eUninitialized);
  mType = eMessagePort;
  return mValue.mMessagePort.SetValue();
}

OwningNonNull<mozilla::dom::MessagePort>&
OwningWindowProxyOrMessagePortOrServiceWorker::SetAsMessagePort()
{
  if (mType == eMessagePort) {
    return mValue.mMessagePort.Value();
  }
  Uninit();
  mType = eMessagePort;
  return mValue.mMessagePort.SetValue();
}

bool
OwningWindowProxyOrMessagePortOrServiceWorker::TrySetToMessagePort(JSContext* cx, JS::Handle<JS::Value> value, bool& tryNext, bool passedToJSImpl)
{
  tryNext = false;
  { // scope for memberSlot
    OwningNonNull<mozilla::dom::MessagePort>& memberSlot = RawSetAsMessagePort();
    static_assert(IsRefcounted<mozilla::dom::MessagePort>::value, "We can only store refcounted classes.");{
      nsresult rv = UnwrapObject<prototypes::id::MessagePort, mozilla::dom::MessagePort>(value, memberSlot);
      if (NS_FAILED(rv)) {
        DestroyMessagePort();
        tryNext = true;
        return true;
      }
    }
  }
  return true;
}

void
OwningWindowProxyOrMessagePortOrServiceWorker::DestroyMessagePort()
{
  MOZ_ASSERT(IsMessagePort(), "Wrong type!");
  mValue.mMessagePort.Destroy();
  mType = eUninitialized;
}




OwningNonNull<mozilla::dom::ServiceWorker>&
OwningWindowProxyOrMessagePortOrServiceWorker::RawSetAsServiceWorker()
{
  if (mType == eServiceWorker) {
    return mValue.mServiceWorker.Value();
  }
  MOZ_ASSERT(mType == eUninitialized);
  mType = eServiceWorker;
  return mValue.mServiceWorker.SetValue();
}

OwningNonNull<mozilla::dom::ServiceWorker>&
OwningWindowProxyOrMessagePortOrServiceWorker::SetAsServiceWorker()
{
  if (mType == eServiceWorker) {
    return mValue.mServiceWorker.Value();
  }
  Uninit();
  mType = eServiceWorker;
  return mValue.mServiceWorker.SetValue();
}

bool
OwningWindowProxyOrMessagePortOrServiceWorker::TrySetToServiceWorker(JSContext* cx, JS::Handle<JS::Value> value, bool& tryNext, bool passedToJSImpl)
{
  tryNext = false;
  { // scope for memberSlot
    OwningNonNull<mozilla::dom::ServiceWorker>& memberSlot = RawSetAsServiceWorker();
    static_assert(IsRefcounted<mozilla::dom::ServiceWorker>::value, "We can only store refcounted classes.");{
      nsresult rv = UnwrapObject<prototypes::id::ServiceWorker, mozilla::dom::ServiceWorker>(value, memberSlot);
      if (NS_FAILED(rv)) {
        DestroyServiceWorker();
        tryNext = true;
        return true;
      }
    }
  }
  return true;
}

void
OwningWindowProxyOrMessagePortOrServiceWorker::DestroyServiceWorker()
{
  MOZ_ASSERT(IsServiceWorker(), "Wrong type!");
  mValue.mServiceWorker.Destroy();
  mType = eUninitialized;
}




void
OwningWindowProxyOrMessagePortOrServiceWorker::Uninit()
{
  switch (mType) {
    case eUninitialized: {
      break;
    }
    case eWindowProxy: {
      DestroyWindowProxy();
      break;
    }
    case eMessagePort: {
      DestroyMessagePort();
      break;
    }
    case eServiceWorker: {
      DestroyServiceWorker();
      break;
    }
  }
}

bool
OwningWindowProxyOrMessagePortOrServiceWorker::ToJSVal(JSContext* cx, JS::Handle<JSObject*> scopeObj, JS::MutableHandle<JS::Value> rval) const
{
  switch (mType) {
    case eUninitialized: {
      return false;
      break;
    }
    case eWindowProxy: {
      if (!WrapObject(cx, mValue.mWindowProxy.Value(), rval)) {
        return false;
      }
      return true;
      break;
    }
    case eMessagePort: {
      if (!GetOrCreateDOMReflector(cx, mValue.mMessagePort.Value(), rval)) {
        MOZ_ASSERT(JS_IsExceptionPending(cx));
        return false;
      }
      return true;
      break;
    }
    case eServiceWorker: {
      if (!GetOrCreateDOMReflector(cx, mValue.mServiceWorker.Value(), rval)) {
        MOZ_ASSERT(JS_IsExceptionPending(cx));
        return false;
      }
      return true;
      break;
    }
    default: {
      return false;
      break;
    }
  }

  return false;
}

void
OwningWindowProxyOrMessagePortOrServiceWorker::TraceUnion(JSTracer* trc)
{
}

OwningWindowProxyOrMessagePortOrServiceWorker&
OwningWindowProxyOrMessagePortOrServiceWorker::operator=(const OwningWindowProxyOrMessagePortOrServiceWorker& aOther)
{
  switch (aOther.mType) {
    case eUninitialized: {
      MOZ_ASSERT(mType == eUninitialized,
                 "We need to destroy ourselves?");
      break;
    }
    case eWindowProxy: {
      SetAsWindowProxy() = aOther.GetAsWindowProxy();
      break;
    }
    case eMessagePort: {
      SetAsMessagePort() = aOther.GetAsMessagePort();
      break;
    }
    case eServiceWorker: {
      SetAsServiceWorker() = aOther.GetAsServiceWorker();
      break;
    }
  }
  return *this;
}



MessageEventInit::MessageEventInit()
  : EventInit(FastDictionaryInitializer()),
    mData(JS::UndefinedValue())
{
  // Safe to pass a null context if we pass a null value
  Init(nullptr, JS::NullHandleValue);
}


bool
MessageEventInit::InitIds(JSContext* cx, MessageEventInitAtoms* atomsCache)
{
  MOZ_ASSERT(!*reinterpret_cast<jsid**>(atomsCache));

  // Initialize these in reverse order so that any failure leaves the first one
  // uninitialized.
  if (!atomsCache->source_id.init(cx, "source") ||
      !atomsCache->ports_id.init(cx, "ports") ||
      !atomsCache->origin_id.init(cx, "origin") ||
      !atomsCache->lastEventId_id.init(cx, "lastEventId") ||
      !atomsCache->data_id.init(cx, "data")) {
    return false;
  }
  return true;
}

bool
MessageEventInit::Init(JSContext* cx, JS::Handle<JS::Value> val, const char* sourceDescription, bool passedToJSImpl)
{
  // Passing a null JSContext is OK only if we're initing from null,
  // Since in that case we will not have to do any property gets
  // Also evaluate isNullOrUndefined in order to avoid false-positive
  // checkers by static analysis tools
  MOZ_ASSERT_IF(!cx, val.isNull() && val.isNullOrUndefined());
  MessageEventInitAtoms* atomsCache = nullptr;
  if (cx) {
    atomsCache = GetAtomCache<MessageEventInitAtoms>(cx);
    if (!*reinterpret_cast<jsid**>(atomsCache) && !InitIds(cx, atomsCache)) {
      return false;
    }
  }

  // Per spec, we init the parent's members first
  if (!EventInit::Init(cx, val)) {
    return false;
  }

  bool isNull = val.isNullOrUndefined();
  // We only need these if !isNull, in which case we have |cx|.
  Maybe<JS::Rooted<JSObject *> > object;
  Maybe<JS::Rooted<JS::Value> > temp;
  if (!isNull) {
    MOZ_ASSERT(cx);
    object.emplace(cx, &val.toObject());
    temp.emplace(cx);
  }
  if (!isNull) {
    if (!JS_GetPropertyById(cx, *object, atomsCache->data_id, temp.ptr())) {
      return false;
    }
  }
  if (!isNull && !temp->isUndefined()) {
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunreachable-code"
#pragma clang diagnostic ignored "-Wunreachable-code-return"
#endif // __clang__
    if ((passedToJSImpl) && !CallerSubsumes(temp.ref())) {
      ThrowErrorMessage(cx, MSG_PERMISSION_DENIED_TO_PASS_ARG, "'data' member of MessageEventInit");
      return false;
    }
#ifdef __clang__
#pragma clang diagnostic pop
#endif // __clang__
    mData = temp.ref();
  } else {
    mData = JS::NullValue();
  }
  mIsAnyMemberPresent = true;

  if (!isNull) {
    if (!JS_GetPropertyById(cx, *object, atomsCache->lastEventId_id, temp.ptr())) {
      return false;
    }
  }
  if (!isNull && !temp->isUndefined()) {
    if (!ConvertJSValueToString(cx, temp.ref(), eStringify, eStringify, mLastEventId)) {
      return false;
    }
  } else {
    static const char16_t data[] = { 0 };
    mLastEventId.Rebind(data, ArrayLength(data) - 1);
  }
  mIsAnyMemberPresent = true;

  if (!isNull) {
    if (!JS_GetPropertyById(cx, *object, atomsCache->origin_id, temp.ptr())) {
      return false;
    }
  }
  if (!isNull && !temp->isUndefined()) {
    if (!ConvertJSValueToString(cx, temp.ref(), eStringify, eStringify, mOrigin)) {
      return false;
    }
  } else {
    static const char16_t data[] = { 0 };
    mOrigin.Rebind(data, ArrayLength(data) - 1);
  }
  mIsAnyMemberPresent = true;

  if (!isNull) {
    if (!JS_GetPropertyById(cx, *object, atomsCache->ports_id, temp.ptr())) {
      return false;
    }
  }
  if (!isNull && !temp->isUndefined()) {
    if (temp.ref().isObject()) {
      JS::ForOfIterator iter(cx);
      if (!iter.init(temp.ref(), JS::ForOfIterator::AllowNonIterable)) {
        return false;
      }
      if (!iter.valueIsIterable()) {
        ThrowErrorMessage(cx, MSG_NOT_SEQUENCE, "'ports' member of MessageEventInit");
        return false;
      }
      Sequence<OwningNonNull<mozilla::dom::MessagePort>> &arr = mPorts;
      JS::Rooted<JS::Value> temp(cx);
      while (true) {
        bool done;
        if (!iter.next(&temp, &done)) {
          return false;
        }
        if (done) {
          break;
        }
        OwningNonNull<mozilla::dom::MessagePort>* slotPtr = arr.AppendElement(mozilla::fallible);
        if (!slotPtr) {
          JS_ReportOutOfMemory(cx);
          return false;
        }
        OwningNonNull<mozilla::dom::MessagePort>& slot = *slotPtr;
        if (temp.isObject()) {
          static_assert(IsRefcounted<mozilla::dom::MessagePort>::value, "We can only store refcounted classes.");{
            nsresult rv = UnwrapObject<prototypes::id::MessagePort, mozilla::dom::MessagePort>(&temp, slot);
            if (NS_FAILED(rv)) {
              ThrowErrorMessage(cx, MSG_DOES_NOT_IMPLEMENT_INTERFACE, "Element of 'ports' member of MessageEventInit", "MessagePort");
              return false;
            }
          }
        } else {
          ThrowErrorMessage(cx, MSG_NOT_OBJECT, "Element of 'ports' member of MessageEventInit");
          return false;
        }
      }
    } else {
      ThrowErrorMessage(cx, MSG_NOT_SEQUENCE, "'ports' member of MessageEventInit");
      return false;
    }
  } else {
    /* Array is already empty; nothing to do */
  }
  mIsAnyMemberPresent = true;

  if (!isNull) {
    if (!JS_GetPropertyById(cx, *object, atomsCache->source_id, temp.ptr())) {
      return false;
    }
  }
  if (!(!isNull && !temp->isUndefined()) || temp.ref().isNullOrUndefined()) {
    mSource.SetNull();
  } else {
    {
      bool done = false, failed = false, tryNext;
      if (temp.ref().isObject()) {
        done = (failed = !mSource.SetValue().TrySetToWindowProxy(cx, temp.ref(), tryNext, passedToJSImpl)) || !tryNext ||
               (failed = !mSource.SetValue().TrySetToMessagePort(cx, temp.ref(), tryNext, passedToJSImpl)) || !tryNext ||
               (failed = !mSource.SetValue().TrySetToServiceWorker(cx, temp.ref(), tryNext, passedToJSImpl)) || !tryNext;

      }
      if (failed) {
        return false;
      }
      if (!done) {
        ThrowErrorMessage(cx, MSG_NOT_IN_UNION, "'source' member of MessageEventInit", "WindowProxy, MessagePort, ServiceWorker");
        return false;
      }
    }
  }
  mIsAnyMemberPresent = true;
  return true;
}

bool
MessageEventInit::ToObjectInternal(JSContext* cx, JS::MutableHandle<JS::Value> rval) const
{
  MessageEventInitAtoms* atomsCache = GetAtomCache<MessageEventInitAtoms>(cx);
  if (!*reinterpret_cast<jsid**>(atomsCache) && !InitIds(cx, atomsCache)) {
    return false;
  }

  // Per spec, we define the parent's members first
  if (!EventInit::ToObjectInternal(cx, rval)) {
    return false;
  }
  JS::Rooted<JSObject*> obj(cx, &rval.toObject());

  do {
    // block for our 'break' successCode and scope for 'temp' and 'currentValue'
    JS::Rooted<JS::Value> temp(cx);
    JS::Value const & currentValue = mData;
    JS::ExposeValueToActiveJS(currentValue);
    temp.set(currentValue);
    if (!MaybeWrapValue(cx, &temp)) {
      return false;
    }
    if (!JS_DefinePropertyById(cx, obj, atomsCache->data_id, temp, JSPROP_ENUMERATE)) {
      return false;
    }
    break;
  } while(false);

  do {
    // block for our 'break' successCode and scope for 'temp' and 'currentValue'
    JS::Rooted<JS::Value> temp(cx);
    nsString const & currentValue = mLastEventId;
    if (!xpc::NonVoidStringToJsval(cx, currentValue, &temp)) {
      return false;
    }
    if (!JS_DefinePropertyById(cx, obj, atomsCache->lastEventId_id, temp, JSPROP_ENUMERATE)) {
      return false;
    }
    break;
  } while(false);

  do {
    // block for our 'break' successCode and scope for 'temp' and 'currentValue'
    JS::Rooted<JS::Value> temp(cx);
    nsString const & currentValue = mOrigin;
    if (!xpc::NonVoidStringToJsval(cx, currentValue, &temp)) {
      return false;
    }
    if (!JS_DefinePropertyById(cx, obj, atomsCache->origin_id, temp, JSPROP_ENUMERATE)) {
      return false;
    }
    break;
  } while(false);

  do {
    // block for our 'break' successCode and scope for 'temp' and 'currentValue'
    JS::Rooted<JS::Value> temp(cx);
    Sequence<OwningNonNull<mozilla::dom::MessagePort>> const & currentValue = mPorts;

    uint32_t length = currentValue.Length();
    JS::Rooted<JSObject*> returnArray(cx, JS_NewArrayObject(cx, length));
    if (!returnArray) {
      return false;
    }
    // Scope for 'tmp'
    {
      JS::Rooted<JS::Value> tmp(cx);
      for (uint32_t sequenceIdx0 = 0; sequenceIdx0 < length; ++sequenceIdx0) {
        // Control block to let us common up the JS_DefineElement calls when there
        // are different ways to succeed at wrapping the object.
        do {
          if (!GetOrCreateDOMReflector(cx, currentValue[sequenceIdx0], &tmp)) {
            MOZ_ASSERT(JS_IsExceptionPending(cx));
            return false;
          }
          break;
        } while (false);
        if (!JS_DefineElement(cx, returnArray, sequenceIdx0, tmp,
                              JSPROP_ENUMERATE)) {
          return false;
        }
      }
    }
    temp.setObject(*returnArray);
    if (!JS_DefinePropertyById(cx, obj, atomsCache->ports_id, temp, JSPROP_ENUMERATE)) {
      return false;
    }
    break;
  } while(false);

  do {
    // block for our 'break' successCode and scope for 'temp' and 'currentValue'
    JS::Rooted<JS::Value> temp(cx);
    Nullable<OwningWindowProxyOrMessagePortOrServiceWorker > const & currentValue = mSource;
    if (currentValue.IsNull()) {
      temp.setNull();
      if (!JS_DefinePropertyById(cx, obj, atomsCache->source_id, temp, JSPROP_ENUMERATE)) {
        return false;
      }
      break;
    }
    if (!currentValue.Value().ToJSVal(cx, obj, &temp)) {
      return false;
    }
    if (!JS_DefinePropertyById(cx, obj, atomsCache->source_id, temp, JSPROP_ENUMERATE)) {
      return false;
    }
    break;
  } while(false);

  return true;
}

void
MessageEventInit::TraceDictionary(JSTracer* trc)
{
  EventInit::TraceDictionary(trc);
  JS::UnsafeTraceRoot(trc, &mData, "MessageEventInit.mData");
}



namespace binding_detail {
} // namespace binding_detail


namespace MessageEvent_Binding {

static_assert(IsRefcounted<NativeType>::value == IsRefcounted<Event_Binding::NativeType>::value,
              "Can't inherit from an interface with a different ownership model.");

MOZ_CAN_RUN_SCRIPT static bool
get_data(JSContext* cx, JS::Handle<JSObject*> obj, mozilla::dom::MessageEvent* self, JSJitGetterCallArgs args)
{
  AUTO_PROFILER_LABEL_FAST("get MessageEvent.data", DOM, cx);

  FastErrorResult rv;
  JS::Rooted<JS::Value> result(cx);
  self->GetData(cx, &result, rv);
  if (MOZ_UNLIKELY(rv.MaybeSetPendingException(cx))) {
    return false;
  }
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  JS::ExposeValueToActiveJS(result);
  args.rval().set(result);
  if (!MaybeWrapValue(cx, args.rval())) {
    return false;
  }
  return true;
}

static const JSJitInfo data_getterinfo = {
  { (JSJitGetterOp)get_data },
  { prototypes::id::MessageEvent },
  { PrototypeTraits<prototypes::id::MessageEvent>::Depth },
  JSJitInfo::Getter,
  JSJitInfo::AliasEverything, /* aliasSet.  Not relevant for setters. */
  JSVAL_TYPE_UNKNOWN,  /* returnType.  Not relevant for setters. */
  false,  /* isInfallible. False in setters. */
  false,  /* isMovable.  Not relevant for setters. */
  false, /* isEliminatable.  Not relevant for setters. */
  false, /* isAlwaysInSlot.  Only relevant for getters. */
  false, /* isLazilyCachedInSlot.  Only relevant for getters. */
  false,  /* isTypedMethod.  Only relevant for methods. */
  0   /* Reserved slot index, if we're stored in a slot, else 0. */
};
static_assert(0 <= JSJitInfo::maxSlotIndex, "We won't fit");
static_assert(0 < 2, "There is no slot for us");

MOZ_CAN_RUN_SCRIPT static bool
get_origin(JSContext* cx, JS::Handle<JSObject*> obj, mozilla::dom::MessageEvent* self, JSJitGetterCallArgs args)
{
  AUTO_PROFILER_LABEL_FAST("get MessageEvent.origin", DOM, cx);

  DOMString result;
  self->GetOrigin(result);
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  if (!xpc::NonVoidStringToJsval(cx, result, args.rval())) {
    return false;
  }
  return true;
}

static const JSJitInfo origin_getterinfo = {
  { (JSJitGetterOp)get_origin },
  { prototypes::id::MessageEvent },
  { PrototypeTraits<prototypes::id::MessageEvent>::Depth },
  JSJitInfo::Getter,
  JSJitInfo::AliasEverything, /* aliasSet.  Not relevant for setters. */
  JSVAL_TYPE_STRING,  /* returnType.  Not relevant for setters. */
  false,  /* isInfallible. False in setters. */
  false,  /* isMovable.  Not relevant for setters. */
  false, /* isEliminatable.  Not relevant for setters. */
  false, /* isAlwaysInSlot.  Only relevant for getters. */
  false, /* isLazilyCachedInSlot.  Only relevant for getters. */
  false,  /* isTypedMethod.  Only relevant for methods. */
  0   /* Reserved slot index, if we're stored in a slot, else 0. */
};
static_assert(0 <= JSJitInfo::maxSlotIndex, "We won't fit");
static_assert(0 < 2, "There is no slot for us");

MOZ_CAN_RUN_SCRIPT static bool
get_lastEventId(JSContext* cx, JS::Handle<JSObject*> obj, mozilla::dom::MessageEvent* self, JSJitGetterCallArgs args)
{
  AUTO_PROFILER_LABEL_FAST("get MessageEvent.lastEventId", DOM, cx);

  DOMString result;
  self->GetLastEventId(result);
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  if (!xpc::NonVoidStringToJsval(cx, result, args.rval())) {
    return false;
  }
  return true;
}

static const JSJitInfo lastEventId_getterinfo = {
  { (JSJitGetterOp)get_lastEventId },
  { prototypes::id::MessageEvent },
  { PrototypeTraits<prototypes::id::MessageEvent>::Depth },
  JSJitInfo::Getter,
  JSJitInfo::AliasEverything, /* aliasSet.  Not relevant for setters. */
  JSVAL_TYPE_STRING,  /* returnType.  Not relevant for setters. */
  false,  /* isInfallible. False in setters. */
  false,  /* isMovable.  Not relevant for setters. */
  false, /* isEliminatable.  Not relevant for setters. */
  false, /* isAlwaysInSlot.  Only relevant for getters. */
  false, /* isLazilyCachedInSlot.  Only relevant for getters. */
  false,  /* isTypedMethod.  Only relevant for methods. */
  0   /* Reserved slot index, if we're stored in a slot, else 0. */
};
static_assert(0 <= JSJitInfo::maxSlotIndex, "We won't fit");
static_assert(0 < 2, "There is no slot for us");

MOZ_CAN_RUN_SCRIPT static bool
get_source(JSContext* cx, JS::Handle<JSObject*> obj, mozilla::dom::MessageEvent* self, JSJitGetterCallArgs args)
{
  AUTO_PROFILER_LABEL_FAST("get MessageEvent.source", DOM, cx);

  Nullable<OwningWindowProxyOrMessagePortOrServiceWorker> result;
  self->GetSource(result);
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  if (result.IsNull()) {
    args.rval().setNull();
    return true;
  }
  if (!result.Value().ToJSVal(cx, obj, args.rval())) {
    return false;
  }
  return true;
}

static const JSJitInfo source_getterinfo = {
  { (JSJitGetterOp)get_source },
  { prototypes::id::MessageEvent },
  { PrototypeTraits<prototypes::id::MessageEvent>::Depth },
  JSJitInfo::Getter,
  JSJitInfo::AliasEverything, /* aliasSet.  Not relevant for setters. */
  JSVAL_TYPE_UNKNOWN,  /* returnType.  Not relevant for setters. */
  false,  /* isInfallible. False in setters. */
  false,  /* isMovable.  Not relevant for setters. */
  false, /* isEliminatable.  Not relevant for setters. */
  false, /* isAlwaysInSlot.  Only relevant for getters. */
  false, /* isLazilyCachedInSlot.  Only relevant for getters. */
  false,  /* isTypedMethod.  Only relevant for methods. */
  0   /* Reserved slot index, if we're stored in a slot, else 0. */
};
static_assert(0 <= JSJitInfo::maxSlotIndex, "We won't fit");
static_assert(0 < 2, "There is no slot for us");

MOZ_CAN_RUN_SCRIPT static bool
get_ports(JSContext* cx, JS::Handle<JSObject*> obj, mozilla::dom::MessageEvent* self, JSJitGetterCallArgs args)
{
  AUTO_PROFILER_LABEL_FAST("get MessageEvent.ports", DOM, cx);

  // Have to either root across the getter call or reget after.
  bool isXray;
  JS::Rooted<JSObject*> slotStorage(cx, GetCachedSlotStorageObject(cx, obj, &isXray));
  if (!slotStorage) {
    return false;
  }
  const size_t slotIndex = isXray ? (xpc::JSSLOT_EXPANDO_COUNT + 0) : (DOM_INSTANCE_RESERVED_SLOTS + 0);
  MOZ_ASSERT(JSCLASS_RESERVED_SLOTS(js::GetObjectClass(slotStorage)) > slotIndex);
  {
    // Scope for cachedVal
    JS::Value cachedVal = js::GetReservedSlot(slotStorage, slotIndex);
    if (!cachedVal.isUndefined()) {
      args.rval().set(cachedVal);
      // The cached value is in the compartment of slotStorage,
      // so wrap into the caller compartment as needed.
      if (MaybeWrapNonDOMObjectValue(cx, args.rval())) {
        return true;
      }
      return false;
    }
  }

  nsTArray<StrongPtrForMember<mozilla::dom::MessagePort>::Type> result;
  self->GetPorts(result);
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  {
    JS::Rooted<JSObject*> conversionScope(cx, isXray ? JS::CurrentGlobalOrNull(cx) : slotStorage);
    JSAutoRealm ar(cx, conversionScope);
    do { // block we break out of when done wrapping

      uint32_t length = result.Length();
      JS::Rooted<JSObject*> returnArray(cx, JS_NewArrayObject(cx, length));
      if (!returnArray) {
        return false;
      }
      // Scope for 'tmp'
      {
        JS::Rooted<JS::Value> tmp(cx);
        for (uint32_t sequenceIdx0 = 0; sequenceIdx0 < length; ++sequenceIdx0) {
          // Control block to let us common up the JS_DefineElement calls when there
          // are different ways to succeed at wrapping the object.
          do {
            if (!GetOrCreateDOMReflector(cx, result[sequenceIdx0], &tmp)) {
              MOZ_ASSERT(JS_IsExceptionPending(cx));
              return false;
            }
            break;
          } while (false);
          if (!JS_DefineElement(cx, returnArray, sequenceIdx0, tmp,
                                JSPROP_ENUMERATE)) {
            return false;
          }
        }
      }
      args.rval().setObject(*returnArray);
      break;
    } while (false);
    JS::Rooted<JSObject*> rvalObj(cx, &args.rval().toObject());
    if (!JS_FreezeObject(cx, rvalObj)) {
      return false;
    }
  }
  { // And now store things in the realm of our slotStorage.
    JSAutoRealm ar(cx, slotStorage);
    // Make a copy so that we don't do unnecessary wrapping on args.rval().
    JS::Rooted<JS::Value> storedVal(cx, args.rval());
    if (!MaybeWrapNonDOMObjectValue(cx, &storedVal)) {
      return false;
    }
    js::SetReservedSlot(slotStorage, slotIndex, storedVal);
    if (!isXray) {
      // In the Xray case we don't need to do this, because getting the
      // expando object already preserved our wrapper.
      PreserveWrapper(self);
    }
  }
  // And now make sure args.rval() is in the caller realm.
  if (MaybeWrapNonDOMObjectValue(cx, args.rval())) {
    return true;
  }
  return false;
}

static const JSJitInfo ports_getterinfo = {
  { (JSJitGetterOp)get_ports },
  { prototypes::id::MessageEvent },
  { PrototypeTraits<prototypes::id::MessageEvent>::Depth },
  JSJitInfo::Getter,
  JSJitInfo::AliasDOMSets, /* aliasSet.  Not relevant for setters. */
  JSVAL_TYPE_OBJECT,  /* returnType.  Not relevant for setters. */
  false,  /* isInfallible. False in setters. */
  true,  /* isMovable.  Not relevant for setters. */
  true, /* isEliminatable.  Not relevant for setters. */
  false, /* isAlwaysInSlot.  Only relevant for getters. */
  true, /* isLazilyCachedInSlot.  Only relevant for getters. */
  false,  /* isTypedMethod.  Only relevant for methods. */
  (DOM_INSTANCE_RESERVED_SLOTS + 0)   /* Reserved slot index, if we're stored in a slot, else 0. */
};
static_assert((DOM_INSTANCE_RESERVED_SLOTS + 0) <= JSJitInfo::maxSlotIndex, "We won't fit");
static_assert((DOM_INSTANCE_RESERVED_SLOTS + 0) < 2, "There is no slot for us");

MOZ_CAN_RUN_SCRIPT static bool
initMessageEvent(JSContext* cx, JS::Handle<JSObject*> obj, mozilla::dom::MessageEvent* self, const JSJitMethodCallArgs& args)
{
  AUTO_PROFILER_LABEL_FAST("MessageEvent.initMessageEvent", DOM, cx);

  if (MOZ_UNLIKELY(args.length() < 1)) {
    return ThrowErrorMessage(cx, MSG_MISSING_ARGUMENTS, "MessageEvent.initMessageEvent");
  }
  binding_detail::FakeString arg0;
  if (!ConvertJSValueToString(cx, args[0], eStringify, eStringify, arg0)) {
    return false;
  }
  bool arg1;
  if (args.hasDefined(1)) {
    if (!ValueToPrimitive<bool, eDefault>(cx, args[1], &arg1)) {
      return false;
    }
  } else {
    arg1 = false;
  }
  bool arg2;
  if (args.hasDefined(2)) {
    if (!ValueToPrimitive<bool, eDefault>(cx, args[2], &arg2)) {
      return false;
    }
  } else {
    arg2 = false;
  }
  JS::Rooted<JS::Value> arg3(cx);
  if (args.hasDefined(3)) {
    arg3 = args[3];
  } else {
    arg3 = JS::NullValue();
  }
  binding_detail::FakeString arg4;
  if (args.hasDefined(4)) {
    if (!ConvertJSValueToString(cx, args[4], eStringify, eStringify, arg4)) {
      return false;
    }
  } else {
    static const char16_t data[] = { 0 };
    arg4.Rebind(data, ArrayLength(data) - 1);
  }
  binding_detail::FakeString arg5;
  if (args.hasDefined(5)) {
    if (!ConvertJSValueToString(cx, args[5], eStringify, eStringify, arg5)) {
      return false;
    }
  } else {
    static const char16_t data[] = { 0 };
    arg5.Rebind(data, ArrayLength(data) - 1);
  }
  Nullable<WindowProxyOrMessagePortOrServiceWorker > arg6;
  Maybe<WindowProxyOrMessagePortOrServiceWorkerArgument> arg6_holder;
  if (!(args.hasDefined(6)) || args[6].isNullOrUndefined()) {
    arg6.SetNull();
  } else {
    arg6_holder.emplace(arg6.SetValue());
    {
      bool done = false, failed = false, tryNext;
      if (args[6].isObject()) {
        done = (failed = !arg6_holder.ref().TrySetToWindowProxy(cx, args[6], tryNext, false)) || !tryNext ||
               (failed = !arg6_holder.ref().TrySetToMessagePort(cx, args[6], tryNext, false)) || !tryNext ||
               (failed = !arg6_holder.ref().TrySetToServiceWorker(cx, args[6], tryNext, false)) || !tryNext;

      }
      if (failed) {
        return false;
      }
      if (!done) {
        ThrowErrorMessage(cx, MSG_NOT_IN_UNION, "Argument 7 of MessageEvent.initMessageEvent", "WindowProxy, MessagePort, ServiceWorker");
        return false;
      }
    }
  }
  binding_detail::AutoSequence<OwningNonNull<mozilla::dom::MessagePort>> arg7;
  if (args.hasDefined(7)) {
    if (args[7].isObject()) {
      JS::ForOfIterator iter(cx);
      if (!iter.init(args[7], JS::ForOfIterator::AllowNonIterable)) {
        return false;
      }
      if (!iter.valueIsIterable()) {
        ThrowErrorMessage(cx, MSG_NOT_SEQUENCE, "Argument 8 of MessageEvent.initMessageEvent");
        return false;
      }
      binding_detail::AutoSequence<OwningNonNull<mozilla::dom::MessagePort>> &arr = arg7;
      JS::Rooted<JS::Value> temp(cx);
      while (true) {
        bool done;
        if (!iter.next(&temp, &done)) {
          return false;
        }
        if (done) {
          break;
        }
        OwningNonNull<mozilla::dom::MessagePort>* slotPtr = arr.AppendElement(mozilla::fallible);
        if (!slotPtr) {
          JS_ReportOutOfMemory(cx);
          return false;
        }
        OwningNonNull<mozilla::dom::MessagePort>& slot = *slotPtr;
        if (temp.isObject()) {
          static_assert(IsRefcounted<mozilla::dom::MessagePort>::value, "We can only store refcounted classes.");{
            nsresult rv = UnwrapObject<prototypes::id::MessagePort, mozilla::dom::MessagePort>(&temp, slot);
            if (NS_FAILED(rv)) {
              ThrowErrorMessage(cx, MSG_DOES_NOT_IMPLEMENT_INTERFACE, "Element of argument 8 of MessageEvent.initMessageEvent", "MessagePort");
              return false;
            }
          }
        } else {
          ThrowErrorMessage(cx, MSG_NOT_OBJECT, "Element of argument 8 of MessageEvent.initMessageEvent");
          return false;
        }
      }
    } else {
      ThrowErrorMessage(cx, MSG_NOT_SEQUENCE, "Argument 8 of MessageEvent.initMessageEvent");
      return false;
    }
  } else {
    /* Array is already empty; nothing to do */
  }
  self->InitMessageEvent(cx, NonNullHelper(Constify(arg0)), arg1, arg2, arg3, NonNullHelper(Constify(arg4)), NonNullHelper(Constify(arg5)), Constify(arg6), Constify(arg7));
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  args.rval().setUndefined();
  return true;
}

static const JSJitInfo initMessageEvent_methodinfo = {
  { (JSJitGetterOp)initMessageEvent },
  { prototypes::id::MessageEvent },
  { PrototypeTraits<prototypes::id::MessageEvent>::Depth },
  JSJitInfo::Method,
  JSJitInfo::AliasEverything, /* aliasSet.  Not relevant for setters. */
  JSVAL_TYPE_UNDEFINED,  /* returnType.  Not relevant for setters. */
  false,  /* isInfallible. False in setters. */
  false,  /* isMovable.  Not relevant for setters. */
  false, /* isEliminatable.  Not relevant for setters. */
  false, /* isAlwaysInSlot.  Only relevant for getters. */
  false, /* isLazilyCachedInSlot.  Only relevant for getters. */
  false,  /* isTypedMethod.  Only relevant for methods. */
  0   /* Reserved slot index, if we're stored in a slot, else 0. */
};
static_assert(0 <= JSJitInfo::maxSlotIndex, "We won't fit");
static_assert(0 < 2, "There is no slot for us");

MOZ_CAN_RUN_SCRIPT static bool
get_isTrusted(JSContext* cx, JS::Handle<JSObject*> obj, mozilla::dom::MessageEvent* self, JSJitGetterCallArgs args)
{
  AUTO_PROFILER_LABEL_FAST("get MessageEvent.isTrusted", DOM, cx);

  bool result(self->IsTrusted());
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  args.rval().setBoolean(result);
  return true;
}

static const JSJitInfo isTrusted_getterinfo = {
  { (JSJitGetterOp)get_isTrusted },
  { prototypes::id::MessageEvent },
  { PrototypeTraits<prototypes::id::MessageEvent>::Depth },
  JSJitInfo::Getter,
  JSJitInfo::AliasDOMSets, /* aliasSet.  Not relevant for setters. */
  JSVAL_TYPE_BOOLEAN,  /* returnType.  Not relevant for setters. */
  true,  /* isInfallible. False in setters. */
  true,  /* isMovable.  Not relevant for setters. */
  true, /* isEliminatable.  Not relevant for setters. */
  false, /* isAlwaysInSlot.  Only relevant for getters. */
  false, /* isLazilyCachedInSlot.  Only relevant for getters. */
  false,  /* isTypedMethod.  Only relevant for methods. */
  0   /* Reserved slot index, if we're stored in a slot, else 0. */
};
static_assert(0 <= JSJitInfo::maxSlotIndex, "We won't fit");
static_assert(0 < 2, "There is no slot for us");

static bool
_addProperty(JSContext* cx, JS::Handle<JSObject*> obj, JS::Handle<jsid> id, JS::Handle<JS::Value> val)
{
  mozilla::dom::MessageEvent* self = UnwrapPossiblyNotInitializedDOMObject<mozilla::dom::MessageEvent>(obj);
  // We don't want to preserve if we don't have a wrapper, and we
  // obviously can't preserve if we're not initialized.
  if (self && self->GetWrapperPreserveColor()) {
    PreserveWrapper(self);
  }
  return true;
}

static void
_finalize(js::FreeOp* fop, JSObject* obj)
{
  mozilla::dom::MessageEvent* self = UnwrapPossiblyNotInitializedDOMObject<mozilla::dom::MessageEvent>(obj);
  if (self) {
    ClearWrapper(self, self, obj);
    AddForDeferredFinalization<mozilla::dom::MessageEvent>(self);
  }
}

static size_t
_objectMoved(JSObject* obj, JSObject* old)
{
  mozilla::dom::MessageEvent* self = UnwrapPossiblyNotInitializedDOMObject<mozilla::dom::MessageEvent>(obj);
  if (self) {
    UpdateWrapper(self, self, obj, old);
  }

  return 0;
}

// We deliberately use brace-elision to make Visual Studio produce better initalization code.
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wmissing-braces"
#endif
static const JSFunctionSpec sMethods_specs[] = {
  JS_FNSPEC("initMessageEvent", (GenericMethod<NormalThisPolicy, ThrowExceptions>), reinterpret_cast<const JSJitInfo*>(&initMessageEvent_methodinfo), 1, JSPROP_ENUMERATE, nullptr),
  JS_FS_END
};
#if defined(__clang__)
#pragma clang diagnostic pop
#endif


static const Prefable<const JSFunctionSpec> sMethods[] = {
  { nullptr, &sMethods_specs[0] },
  { nullptr, nullptr }
};

static_assert(1 <= 1ull << NUM_BITS_PROPERTY_INFO_PREF_INDEX,
    "We have a prefable index that is >= (1 << NUM_BITS_PROPERTY_INFO_PREF_INDEX)");
static_assert(1 <= 1ull << NUM_BITS_PROPERTY_INFO_SPEC_INDEX,
    "We have a spec index that is >= (1 << NUM_BITS_PROPERTY_INFO_SPEC_INDEX)");

// We deliberately use brace-elision to make Visual Studio produce better initalization code.
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wmissing-braces"
#endif
static const JSPropertySpec sAttributes_specs[] = {
  { "data", JSPROP_ENUMERATE, GenericGetter<NormalThisPolicy, ThrowExceptions>, &data_getterinfo, nullptr, nullptr },
  { "origin", JSPROP_ENUMERATE, GenericGetter<NormalThisPolicy, ThrowExceptions>, &origin_getterinfo, nullptr, nullptr },
  { "lastEventId", JSPROP_ENUMERATE, GenericGetter<NormalThisPolicy, ThrowExceptions>, &lastEventId_getterinfo, nullptr, nullptr },
  { "source", JSPROP_ENUMERATE, GenericGetter<NormalThisPolicy, ThrowExceptions>, &source_getterinfo, nullptr, nullptr },
  { "ports", JSPROP_ENUMERATE, GenericGetter<NormalThisPolicy, ThrowExceptions>, &ports_getterinfo, nullptr, nullptr },
  { nullptr, 0, nullptr, nullptr, nullptr, nullptr }
};
#if defined(__clang__)
#pragma clang diagnostic pop
#endif


static const Prefable<const JSPropertySpec> sAttributes[] = {
  { nullptr, &sAttributes_specs[0] },
  { nullptr, nullptr }
};

static_assert(1 <= 1ull << NUM_BITS_PROPERTY_INFO_PREF_INDEX,
    "We have a prefable index that is >= (1 << NUM_BITS_PROPERTY_INFO_PREF_INDEX)");
static_assert(5 <= 1ull << NUM_BITS_PROPERTY_INFO_SPEC_INDEX,
    "We have a spec index that is >= (1 << NUM_BITS_PROPERTY_INFO_SPEC_INDEX)");

// We deliberately use brace-elision to make Visual Studio produce better initalization code.
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wmissing-braces"
#endif
static const JSPropertySpec sUnforgeableAttributes_specs[] = {
  { "isTrusted", JSPROP_ENUMERATE | JSPROP_PERMANENT, GenericGetter<NormalThisPolicy, ThrowExceptions>, &isTrusted_getterinfo, nullptr, nullptr },
  { nullptr, 0, nullptr, nullptr, nullptr, nullptr }
};
#if defined(__clang__)
#pragma clang diagnostic pop
#endif


static const Prefable<const JSPropertySpec> sUnforgeableAttributes[] = {
  { nullptr, &sUnforgeableAttributes_specs[0] },
  { nullptr, nullptr }
};

static_assert(1 <= 1ull << NUM_BITS_PROPERTY_INFO_PREF_INDEX,
    "We have a prefable index that is >= (1 << NUM_BITS_PROPERTY_INFO_PREF_INDEX)");
static_assert(1 <= 1ull << NUM_BITS_PROPERTY_INFO_SPEC_INDEX,
    "We have a spec index that is >= (1 << NUM_BITS_PROPERTY_INFO_SPEC_INDEX)");


static uint16_t sNativeProperties_sortedPropertyIndices[7];
static PropertyInfo sNativeProperties_propertyInfos[7];

static const NativePropertiesN<3> sNativeProperties = {
  false, 0,
  false, 0,
  true,  0 /* sMethods */,
  true,  1 /* sAttributes */,
  false, 0,
  true,  2 /* sUnforgeableAttributes */,
  false, 0,
  -1,
  7,
  sNativeProperties_sortedPropertyIndices,
  {
    { sMethods, &sNativeProperties_propertyInfos[0] },
    { sAttributes, &sNativeProperties_propertyInfos[1] },
    { sUnforgeableAttributes, &sNativeProperties_propertyInfos[6] }
  }
};
static_assert(7 < 1ull << CHAR_BIT * sizeof(sNativeProperties.propertyInfoCount),
    "We have a property info count that is oversized");

static bool
_constructor(JSContext* cx, unsigned argc, JS::Value* vp)
{
  AUTO_PROFILER_LABEL_FAST("MessageEvent constructor", DOM, cx);

  JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
  JS::Rooted<JSObject*> obj(cx, &args.callee());
  if (!args.isConstructing()) {
    // XXXbz wish I could get the name from the callee instead of
    // Adding more relocations
    return ThrowConstructorWithoutNew(cx, "MessageEvent");
  }

  JS::Rooted<JSObject*> desiredProto(cx);
  if (!GetDesiredProto(cx, args, &desiredProto)) {
    return false;
  }

  if (MOZ_UNLIKELY(args.length() < 1)) {
    return ThrowErrorMessage(cx, MSG_MISSING_ARGUMENTS, "MessageEvent");
  }
  GlobalObject global(cx, obj);
  if (global.Failed()) {
    return false;
  }

  bool objIsXray = xpc::WrapperFactory::IsXrayWrapper(obj);
  binding_detail::FakeString arg0;
  if (!ConvertJSValueToString(cx, args[0], eStringify, eStringify, arg0)) {
    return false;
  }
  RootedDictionary<binding_detail::FastMessageEventInit> arg1(cx);
  if (!arg1.Init(cx, (args.hasDefined(1)) ? args[1] : JS::NullHandleValue,  "Argument 2 of MessageEvent.constructor", false)) {
    return false;
  }
  Maybe<JSAutoRealm> ar;
  if (objIsXray) {
    obj = js::CheckedUnwrap(obj);
    if (!obj) {
      return false;
    }
    ar.emplace(cx, obj);
    if (!JS_WrapObject(cx, &desiredProto)) {
      return false;
    }
    if (!JS_WrapValue(cx, JS::MutableHandle<JS::Value>::fromMarkedLocation(&arg1.mData))) {
      return false;
    }
  }
  FastErrorResult rv;
  auto result(StrongOrRawPtr<mozilla::dom::MessageEvent>(mozilla::dom::MessageEvent::Constructor(global, NonNullHelper(Constify(arg0)), Constify(arg1), rv)));
  if (MOZ_UNLIKELY(rv.MaybeSetPendingException(cx))) {
    return false;
  }
  MOZ_ASSERT(!JS_IsExceptionPending(cx));
  static_assert(!IsPointer<decltype(result)>::value,
                "NewObject implies that we need to keep the object alive with a strong reference.");
  if (!GetOrCreateDOMReflector(cx, result, args.rval(), desiredProto)) {
    MOZ_ASSERT(JS_IsExceptionPending(cx));
    return false;
  }
  return true;
}

static const js::ClassOps sInterfaceObjectClassOps = {
    nullptr,               /* addProperty */
    nullptr,               /* delProperty */
    nullptr,               /* enumerate */
    nullptr,               /* newEnumerate */
    nullptr,               /* resolve */
    nullptr,               /* mayResolve */
    nullptr,               /* finalize */
    _constructor, /* call */
    nullptr,               /* hasInstance */
    _constructor, /* construct */
    nullptr,               /* trace */
};

static const DOMIfaceAndProtoJSClass sInterfaceObjectClass = {
  {
    "Function",
    JSCLASS_IS_DOMIFACEANDPROTOJSCLASS | JSCLASS_HAS_RESERVED_SLOTS(DOM_INTERFACE_SLOTS_BASE),
    &sInterfaceObjectClassOps,
    JS_NULL_CLASS_SPEC,
    JS_NULL_CLASS_EXT,
    &sInterfaceObjectClassObjectOps
  },
  eInterface,
  true,
  prototypes::id::MessageEvent,
  PrototypeTraits<prototypes::id::MessageEvent>::Depth,
  sNativePropertyHooks,
  "function MessageEvent() {\n    [native code]\n}",
  Event_Binding::GetConstructorObject
};

static const DOMIfaceAndProtoJSClass sPrototypeClass = {
  {
    "MessageEventPrototype",
    JSCLASS_IS_DOMIFACEANDPROTOJSCLASS | JSCLASS_HAS_RESERVED_SLOTS(DOM_INTERFACE_PROTO_SLOTS_BASE + 1 /* slot for the JSObject holding the unforgeable properties */),
    JS_NULL_CLASS_OPS,
    JS_NULL_CLASS_SPEC,
    JS_NULL_CLASS_EXT,
    JS_NULL_OBJECT_OPS
  },
  eInterfacePrototype,
  false,
  prototypes::id::MessageEvent,
  PrototypeTraits<prototypes::id::MessageEvent>::Depth,
  sNativePropertyHooks,
  "[object MessageEventPrototype]",
  Event_Binding::GetProtoObject
};

static const js::ClassOps sClassOps = {
  _addProperty, /* addProperty */
  nullptr,               /* delProperty */
  nullptr,               /* enumerate */
  nullptr, /* newEnumerate */
  nullptr, /* resolve */
  nullptr, /* mayResolve */
  _finalize, /* finalize */
  nullptr, /* call */
  nullptr,               /* hasInstance */
  nullptr,               /* construct */
  nullptr, /* trace */
};

static const js::ClassExtension sClassExtension = {
  nullptr, /* weakmapKeyDelegateOp */
  _objectMoved /* objectMovedOp */
};

static const DOMJSClass sClass = {
  { "MessageEvent",
    JSCLASS_IS_DOMJSCLASS | JSCLASS_FOREGROUND_FINALIZE | JSCLASS_HAS_RESERVED_SLOTS(2) | JSCLASS_SKIP_NURSERY_FINALIZE,
    &sClassOps,
    JS_NULL_CLASS_SPEC,
    &sClassExtension,
    JS_NULL_OBJECT_OPS
  },
  { prototypes::id::Event, prototypes::id::MessageEvent, prototypes::id::_ID_Count, prototypes::id::_ID_Count, prototypes::id::_ID_Count, prototypes::id::_ID_Count, prototypes::id::_ID_Count, prototypes::id::_ID_Count },
  IsBaseOf<nsISupports, mozilla::dom::MessageEvent >::value,
  sNativePropertyHooks,
  FindAssociatedGlobalForNative<mozilla::dom::MessageEvent>::Get,
  GetProtoObjectHandle,
  GetCCParticipant<mozilla::dom::MessageEvent>::Get()
};
static_assert(1 == DOM_INSTANCE_RESERVED_SLOTS,
              "Must have the right minimal number of reserved slots.");
static_assert(2 >= 2,
              "Must have enough reserved slots.");

const JSClass*
GetJSClass()
{
  return sClass.ToJSClass();
}

bool
Wrap(JSContext* aCx, mozilla::dom::MessageEvent* aObject, nsWrapperCache* aCache, JS::Handle<JSObject*> aGivenProto, JS::MutableHandle<JSObject*> aReflector)
{
  static_assert(!IsBaseOf<NonRefcountedDOMObject, mozilla::dom::MessageEvent>::value,
                "Shouldn't have wrappercached things that are not refcounted.");
  MOZ_ASSERT(static_cast<mozilla::dom::MessageEvent*>(aObject) ==
             reinterpret_cast<mozilla::dom::MessageEvent*>(aObject),
             "Multiple inheritance for mozilla::dom::MessageEvent is broken.");
  MOZ_ASSERT(static_cast<mozilla::dom::Event*>(aObject) ==
             reinterpret_cast<mozilla::dom::Event*>(aObject),
             "Multiple inheritance for mozilla::dom::Event is broken.");
  MOZ_ASSERT(ToSupportsIsCorrect(aObject));
  MOZ_ASSERT_IF(aGivenProto, js::IsObjectInContextCompartment(aGivenProto, aCx));
  MOZ_ASSERT(!aCache->GetWrapper(),
             "You should probably not be using Wrap() directly; use "
             "GetOrCreateDOMReflector instead");

  MOZ_ASSERT(ToSupportsIsOnPrimaryInheritanceChain(aObject, aCache),
             "nsISupports must be on our primary inheritance chain");

  JS::Rooted<JSObject*> global(aCx, FindAssociatedGlobal(aCx, aObject->GetParentObject()));
  if (!global) {
    return false;
  }
  MOZ_ASSERT(JS_IsGlobalObject(global));
  MOZ_ASSERT(JS::ObjectIsNotGray(global));

  // That might have ended up wrapping us already, due to the wonders
  // of XBL.  Check for that, and bail out as needed.
  aReflector.set(aCache->GetWrapper());
  if (aReflector) {
#ifdef DEBUG
    AssertReflectorHasGivenProto(aCx, aReflector, aGivenProto);
#endif // DEBUG
    return true;
  }

  JSAutoRealm ar(aCx, global);
  JS::Handle<JSObject*> canonicalProto = GetProtoObjectHandle(aCx);
  if (!canonicalProto) {
    return false;
  }
  JS::Rooted<JSObject*> proto(aCx);
  if (aGivenProto) {
    proto = aGivenProto;
    // Unfortunately, while aGivenProto was in the compartment of aCx
    // coming in, we changed compartments to that of "parent" so may need
    // to wrap the proto here.
    if (js::GetContextCompartment(aCx) != js::GetObjectCompartment(proto)) {
      if (!JS_WrapObject(aCx, &proto)) {
        return false;
      }
    }
  } else {
    proto = canonicalProto;
  }

  BindingJSObjectCreator<mozilla::dom::MessageEvent> creator(aCx);
  creator.CreateObject(aCx, sClass.ToJSClass(), proto, aObject, aReflector);
  if (!aReflector) {
    return false;
  }

  aCache->SetWrapper(aReflector);

  // Important: do unforgeable property setup after we have handed
  // over ownership of the C++ object to obj as needed, so that if
  // we fail and it ends up GCed it won't have problems in the
  // finalizer trying to drop its ownership of the C++ object.
  JS::Rooted<JSObject*> unforgeableHolder(aCx,
    &js::GetReservedSlot(canonicalProto, DOM_INTERFACE_PROTO_SLOTS_BASE).toObject());
  if (!JS_InitializePropertiesFromCompatibleNativeObject(aCx, aReflector, unforgeableHolder)) {
    aCache->ReleaseWrapper(aObject);
    aCache->ClearWrapper();
    return false;
  }
  creator.InitializationSucceeded();

  MOZ_ASSERT(aCache->GetWrapperPreserveColor() &&
             aCache->GetWrapperPreserveColor() == aReflector);
  // If proto != canonicalProto, we have to preserve our wrapper;
  // otherwise we won't be able to properly recreate it later, since
  // we won't know what proto to use.  Note that we don't check
  // aGivenProto here, since it's entirely possible (and even
  // somewhat common) to have a non-null aGivenProto which is the
  // same as canonicalProto.
  if (proto != canonicalProto) {
    PreserveWrapper(aObject);
  }

  return true;
}

// This may allocate too many slots, because we only really need
// slots for our non-interface-typed members that we cache.  But
// allocating slots only for those would make the slot index
// computations much more complicated, so let's do this the simple
// way for now.
DEFINE_XRAY_EXPANDO_CLASS(static, sXrayExpandoObjectClass, 1);

const NativePropertyHooks sNativePropertyHooks[] = { {
  nullptr,
  nullptr,
  nullptr,
  { sNativeProperties.Upcast(), nullptr },
  prototypes::id::MessageEvent,
  constructors::id::MessageEvent,
  Event_Binding::sNativePropertyHooks,
  &sXrayExpandoObjectClass
} };

void
ClearCachedPortsValue(mozilla::dom::MessageEvent* aObject)
{
  JSObject* obj;
  obj = aObject->GetWrapper();
  if (!obj) {
    return;
  }
  js::SetReservedSlot(obj, (DOM_INSTANCE_RESERVED_SLOTS + 0), JS::UndefinedValue());
  xpc::ClearXrayExpandoSlots(obj, (xpc::JSSLOT_EXPANDO_COUNT + 0));
}

void
CreateInterfaceObjects(JSContext* aCx, JS::Handle<JSObject*> aGlobal, ProtoAndIfaceCache& aProtoAndIfaceCache, bool aDefineOnGlobal)
{
  JS::Handle<JSObject*> parentProto(Event_Binding::GetProtoObjectHandle(aCx));
  if (!parentProto) {
    return;
  }

  JS::Handle<JSObject*> constructorProto(Event_Binding::GetConstructorObjectHandle(aCx));
  if (!constructorProto) {
    return;
  }

  static bool sIdsInited = false;
  if (!sIdsInited && NS_IsMainThread()) {
    if (!InitIds(aCx, sNativeProperties.Upcast())) {
      return;
    }
    sIdsInited = true;
  }

  JS::Heap<JSObject*>* protoCache = &aProtoAndIfaceCache.EntrySlotOrCreate(prototypes::id::MessageEvent);
  JS::Heap<JSObject*>* interfaceCache = &aProtoAndIfaceCache.EntrySlotOrCreate(constructors::id::MessageEvent);
  dom::CreateInterfaceObjects(aCx, aGlobal, parentProto,
                              &sPrototypeClass.mBase, protoCache,
                              nullptr,
                              constructorProto, &sInterfaceObjectClass.mBase, 1, nullptr,
                              interfaceCache,
                              sNativeProperties.Upcast(),
                              nullptr,
                              "MessageEvent", aDefineOnGlobal,
                              nullptr,
                              false);

  JS::Rooted<JSObject*> unforgeableHolder(aCx);
  {
    JS::Rooted<JSObject*> holderProto(aCx, *protoCache);
    unforgeableHolder = JS_NewObjectWithoutMetadata(aCx, sClass.ToJSClass(), holderProto);
    if (!unforgeableHolder) {
      *protoCache = nullptr;
      if (interfaceCache) {
        *interfaceCache = nullptr;
      }
      return;
    }
  }

  if (!DefineUnforgeableAttributes(aCx, unforgeableHolder, sUnforgeableAttributes)) {
    *protoCache = nullptr;
    if (interfaceCache) {
      *interfaceCache = nullptr;
    }
    return;
  }

  if (*protoCache) {
    js::SetReservedSlot(*protoCache, DOM_INTERFACE_PROTO_SLOTS_BASE,
                        JS::ObjectValue(*unforgeableHolder));
  }
}

JSObject*
GetConstructorObject(JSContext* aCx)
{
  return GetConstructorObjectHandle(aCx);
}

} // namespace MessageEvent_Binding



} // namespace dom
} // namespace mozilla

Coverage Report

Created: 2018-09-25 14:53