// static
JSObject*
DOMProxyHandler::GetAndClearExpandoObject(JSObject* obj)
{
MOZ_ASSERT(IsDOMProxy(obj), "expected a DOM proxy object");
JS::Value v = js::GetProxyExtra(obj, JSPROXYSLOT_EXPANDO);
if (v.isUndefined()) {
return nullptr;
}
if (v.isObject()) {
js::SetProxyExtra(obj, JSPROXYSLOT_EXPANDO, UndefinedValue());
xpc::GetObjectScope(obj)->RemoveDOMExpandoObject(obj);
} else {
js::ExpandoAndGeneration* expandoAndGeneration =
static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
v = expandoAndGeneration->expando;
if (v.isUndefined()) {
return nullptr;
}
expandoAndGeneration->expando = UndefinedValue();
}
return &v.toObject();
}
js::DOMProxyShadowsResult
DOMProxyShadows(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id)
{
JS::Rooted<JSObject*> expando(cx, DOMProxyHandler::GetExpandoObject(proxy));
JS::Value v = js::GetProxyExtra(proxy, JSPROXYSLOT_EXPANDO);
bool isOverrideBuiltins = !v.isObject() && !v.isUndefined();
if (expando) {
bool hasOwn;
if (!JS_AlreadyHasOwnPropertyById(cx, expando, id, &hasOwn))
return js::ShadowCheckFailed;
if (hasOwn) {
return isOverrideBuiltins ?
js::ShadowsViaIndirectExpando : js::ShadowsViaDirectExpando;
}
}
if (!isOverrideBuiltins) {
// Our expando, if any, didn't shadow, so we're not shadowing at all.
return js::DoesntShadow;
}
bool hasOwn;
if (!GetProxyHandler(proxy)->hasOwn(cx, proxy, id, &hasOwn))
return js::ShadowCheckFailed;
return hasOwn ? js::Shadows : js::DoesntShadowUnique;
}
static inline void CheckExpandoAndGeneration(
JSObject* proxy, js::ExpandoAndGeneration* expandoAndGeneration) {
#ifdef DEBUG
JS::Value value = expandoAndGeneration->expando;
if (!value.isUndefined()) CheckExpandoObject(proxy, value);
#endif
}
void ModuleScript::SetParseError(const JS::Value& aError) {
MOZ_ASSERT(!aError.isUndefined());
MOZ_ASSERT(!HasParseError());
MOZ_ASSERT(!HasErrorToRethrow());
UnlinkModuleRecord();
mParseError = aError;
HoldJSObjects(this);
}
//static
JSObject *
DOMProxyHandler::GetExpandoObject(JSObject *obj)
{
MOZ_ASSERT(IsDOMProxy(obj), "expected a DOM proxy object");
JS::Value v = js::GetProxyExtra(obj, JSPROXYSLOT_EXPANDO);
if (v.isObject()) {
return &v.toObject();
}
if (v.isUndefined()) {
return nullptr;
}
js::ExpandoAndGeneration* expandoAndGeneration =
static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
v = expandoAndGeneration->expando;
return v.isUndefined() ? nullptr : &v.toObject();
}
void ModuleScript::SetErrorToRethrow(const JS::Value& aError) {
MOZ_ASSERT(!aError.isUndefined());
// This is only called after SetModuleRecord() or SetParseError() so we don't
// need to call HoldJSObjects() here.
MOZ_ASSERT(ModuleRecord() || HasParseError());
mErrorToRethrow = aError;
}
// static
JSObject* DOMProxyHandler::GetExpandoObject(JSObject* obj) {
CheckDOMProxy(obj);
JS::Value v = js::GetProxyPrivate(obj);
if (v.isObject()) {
CheckExpandoObject(obj, v);
return &v.toObject();
}
if (v.isUndefined()) {
return nullptr;
}
js::ExpandoAndGeneration* expandoAndGeneration =
static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
CheckExpandoAndGeneration(obj, expandoAndGeneration);
v = expandoAndGeneration->expando;
return v.isUndefined() ? nullptr : &v.toObject();
}
bool CoerceDouble(const JS::Value& v, double* d) {
if (v.isDouble()) {
*d = v.toDouble();
} else if (v.isInt32()) {
*d = double(v.toInt32());
} else if (v.isUndefined()) {
*d = 0.0;
} else {
return false;
}
return true;
}
/**
* Extract the FinalizationEvent from an instance of FinalizationWitness
* and clear the slot containing the FinalizationEvent.
*/
already_AddRefed<FinalizationEvent>
ExtractFinalizationEvent(JSObject *objSelf)
{
JS::Value slotEvent = JS_GetReservedSlot(objSelf, WITNESS_SLOT_EVENT);
if (slotEvent.isUndefined()) {
// Forget() has been called
return nullptr;
}
JS_SetReservedSlot(objSelf, WITNESS_SLOT_EVENT, JS::UndefinedValue());
return dont_AddRef(static_cast<FinalizationEvent*>(slotEvent.toPrivate()));
}
// static
JSObject*
DOMProxyHandler::GetAndClearExpandoObject(JSObject* obj)
{
MOZ_ASSERT(IsDOMProxy(obj), "expected a DOM proxy object");
JS::Value v = js::GetProxyPrivate(obj);
if (v.isUndefined()) {
return nullptr;
}
if (v.isObject()) {
js::SetProxyPrivate(obj, UndefinedValue());
} else {
js::ExpandoAndGeneration* expandoAndGeneration =
static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
v = expandoAndGeneration->expando;
if (v.isUndefined()) {
return nullptr;
}
// We have to expose v to active JS here. The reason for that is that we
// might be in the middle of a GC right now. If our proxy hasn't been
// traced yet, when it _does_ get traced it won't trace the expando, since
// we're breaking that link. But the Rooted we're presumably being placed
// into is also not going to trace us, because Rooted marking is done at
// the very beginning of the GC. In that situation, we need to manually
// mark the expando as live here. JS::ExposeValueToActiveJS will do just
// that for us.
//
// We don't need to do this in the non-expandoAndGeneration case, because
// in that case our value is stored in a slot and slots will already mark
// the old thing live when the value in the slot changes.
JS::ExposeValueToActiveJS(v);
expandoAndGeneration->expando = UndefinedValue();
}
return &v.toObject();
}
// static
JSObject* DOMProxyHandler::GetAndClearExpandoObject(JSObject* obj) {
CheckDOMProxy(obj);
JS::Value v = js::GetProxyPrivate(obj);
if (v.isUndefined()) {
return nullptr;
}
if (v.isObject()) {
js::SetProxyPrivate(obj, UndefinedValue());
} else {
js::ExpandoAndGeneration* expandoAndGeneration =
static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
v = expandoAndGeneration->expando;
if (v.isUndefined()) {
return nullptr;
}
expandoAndGeneration->expando = UndefinedValue();
}
CheckExpandoObject(obj, v);
return &v.toObject();
}
bool
GetSendMmsMessageRequestFromParams(uint32_t aServiceId,
const JS::Value& aParam,
SendMmsMessageRequest& request) {
if (aParam.isUndefined() || aParam.isNull() || !aParam.isObject()) {
return false;
}
mozilla::AutoJSContext cx;
JS::Rooted<JS::Value> param(cx, aParam);
RootedDictionary<MmsParameters> params(cx);
if (!params.Init(cx, param)) {
return false;
}
// SendMobileMessageRequest.receivers
if (!params.mReceivers.WasPassed()) {
return false;
}
request.receivers().AppendElements(params.mReceivers.Value());
// SendMobileMessageRequest.attachments
mozilla::dom::ContentChild* cc = mozilla::dom::ContentChild::GetSingleton();
if (!params.mAttachments.WasPassed()) {
return false;
}
for (uint32_t i = 0; i < params.mAttachments.Value().Length(); i++) {
mozilla::dom::MmsAttachment& attachment = params.mAttachments.Value()[i];
MmsAttachmentData mmsAttachment;
mmsAttachment.id().Assign(attachment.mId);
mmsAttachment.location().Assign(attachment.mLocation);
mmsAttachment.contentChild() = cc->GetOrCreateActorForBlob(attachment.mContent);
if (!mmsAttachment.contentChild()) {
return false;
}
request.attachments().AppendElement(mmsAttachment);
}
request.smil() = params.mSmil;
request.subject() = params.mSubject;
// Set service ID.
request.serviceId() = aServiceId;
return true;
}
void ShadowingDOMProxyHandler::trace(JSTracer* trc, JSObject* proxy) const {
DOMProxyHandler::trace(trc, proxy);
MOZ_ASSERT(IsDOMProxy(proxy), "expected a DOM proxy object");
JS::Value v = js::GetProxyPrivate(proxy);
MOZ_ASSERT(!v.isObject(), "Should not have expando object directly!");
// The proxy's private slot is set when we allocate the proxy,
// so it cannot be |undefined|.
MOZ_ASSERT(!v.isUndefined());
js::ExpandoAndGeneration* expandoAndGeneration =
static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
JS::TraceEdge(trc, &expandoAndGeneration->expando,
"Shadowing DOM proxy expando");
}
// static
JSObject*
DOMProxyHandler::EnsureExpandoObject(JSContext* cx, JS::Handle<JSObject*> obj)
{
NS_ASSERTION(IsDOMProxy(obj), "expected a DOM proxy object");
JS::Value v = js::GetProxyExtra(obj, JSPROXYSLOT_EXPANDO);
if (v.isObject()) {
return &v.toObject();
}
js::ExpandoAndGeneration* expandoAndGeneration;
if (!v.isUndefined()) {
expandoAndGeneration = static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
if (expandoAndGeneration->expando.isObject()) {
return &expandoAndGeneration->expando.toObject();
}
} else {
expandoAndGeneration = nullptr;
}
JS::Rooted<JSObject*> expando(cx,
JS_NewObjectWithGivenProto(cx, nullptr, nullptr, js::GetObjectParent(obj)));
if (!expando) {
return nullptr;
}
nsISupports* native = UnwrapDOMObject<nsISupports>(obj);
nsWrapperCache* cache;
CallQueryInterface(native, &cache);
if (expandoAndGeneration) {
cache->PreserveWrapper(native);
expandoAndGeneration->expando.setObject(*expando);
return expando;
}
XPCWrappedNativeScope* scope = xpc::GetObjectScope(obj);
if (!scope->RegisterDOMExpandoObject(obj)) {
return nullptr;
}
cache->SetPreservingWrapper(true);
js::SetProxyExtra(obj, JSPROXYSLOT_EXPANDO, ObjectValue(*expando));
return expando;
}
/**
* Get a field of an object as an object.
*
* If the field does not exist, create it. If it exists but is not an
* object, throw a JS error.
*/
JSObject *GetOrCreateObjectProperty(JSContext *cx, JSObject *aObject,
const char *aProperty)
{
JS::Value val;
if (!JS_GetProperty(cx, aObject, aProperty, &val)) {
return NULL;
}
if (!val.isUndefined()) {
if (val.isObject()) {
return &val.toObject();
}
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL,
JSMSG_UNEXPECTED_TYPE, aProperty, "not an object");
return NULL;
}
return JS_DefineObject(cx, aObject, aProperty, NULL, NULL, JSPROP_ENUMERATE);
}
std::string
gjs_debug_value(JS::Value v)
{
std::ostringstream out;
if (v.isNull())
return "null";
if (v.isUndefined())
return "undefined";
if (v.isInt32()) {
out << v.toInt32();
return out.str();
}
if (v.isDouble()) {
out << v.toDouble();
return out.str();
}
if (v.isString()) {
out << gjs_debug_string(v.toString());
return out.str();
}
if (v.isSymbol()) {
out << gjs_debug_symbol(v.toSymbol());
return out.str();
}
if (v.isObject() && js::IsFunctionObject(&v.toObject())) {
JSFunction* fun = JS_GetObjectFunction(&v.toObject());
JSString *display_name = JS_GetFunctionDisplayId(fun);
if (display_name)
out << "<function " << gjs_debug_string(display_name);
else
out << "<unnamed function";
out << " at " << fun << '>';
return out.str();
}
if (v.isObject()) {
out << gjs_debug_object(&v.toObject());
return out.str();
}
if (v.isBoolean())
return (v.toBoolean() ? "true" : "false");
if (v.isMagic())
return "<magic>";
return "unexpected value";
}
// static
JSObject* DOMProxyHandler::EnsureExpandoObject(JSContext* cx,
JS::Handle<JSObject*> obj) {
CheckDOMProxy(obj);
JS::Value v = js::GetProxyPrivate(obj);
if (v.isObject()) {
CheckExpandoObject(obj, v);
return &v.toObject();
}
js::ExpandoAndGeneration* expandoAndGeneration;
if (!v.isUndefined()) {
expandoAndGeneration =
static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
CheckExpandoAndGeneration(obj, expandoAndGeneration);
if (expandoAndGeneration->expando.isObject()) {
return &expandoAndGeneration->expando.toObject();
}
} else {
expandoAndGeneration = nullptr;
}
JS::Rooted<JSObject*> expando(
cx, JS_NewObjectWithGivenProto(cx, nullptr, nullptr));
if (!expando) {
return nullptr;
}
nsISupports* native = UnwrapDOMObject<nsISupports>(obj);
nsWrapperCache* cache;
CallQueryInterface(native, &cache);
cache->PreserveWrapper(native);
if (expandoAndGeneration) {
expandoAndGeneration->expando.setObject(*expando);
return expando;
}
js::SetProxyPrivate(obj, ObjectValue(*expando));
return expando;
}
js::DOMProxyShadowsResult
DOMProxyShadows(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id)
{
JS::Value v = js::GetProxyExtra(proxy, JSPROXYSLOT_EXPANDO);
if (v.isObject()) {
bool hasOwn;
if (!JS_AlreadyHasOwnPropertyById(cx, &v.toObject(), id, &hasOwn))
return js::ShadowCheckFailed;
return hasOwn ? js::Shadows : js::DoesntShadow;
}
if (v.isUndefined()) {
return js::DoesntShadow;
}
bool hasOwn;
if (!GetProxyHandler(proxy)->hasOwn(cx, proxy, id, &hasOwn))
return js::ShadowCheckFailed;
return hasOwn ? js::Shadows : js::DoesntShadowUnique;
}
NS_IMETHODIMP
TCPSocketParent::SendCallback(const nsAString& aType, const JS::Value& aDataVal,
const nsAString& aReadyState, uint32_t aBuffered,
JSContext* aCx)
{
if (!mIPCOpen) {
NS_WARNING("Dropping callback due to no IPC connection");
return NS_OK;
}
CallbackData data;
if (aDataVal.isString()) {
JSString* jsstr = aDataVal.toString();
nsDependentJSString str;
if (!str.init(aCx, jsstr)) {
FireInteralError(this, __LINE__);
return NS_ERROR_OUT_OF_MEMORY;
}
data = str;
} else if (aDataVal.isUndefined() || aDataVal.isNull()) {
data = mozilla::void_t();
} else if (aDataVal.isObject()) {
JSObject* obj = &aDataVal.toObject();
if (JS_IsTypedArrayObject(obj)) {
NS_ENSURE_TRUE(JS_IsUint8Array(obj), NS_ERROR_FAILURE);
uint32_t nbytes = JS_GetTypedArrayByteLength(obj);
uint8_t* buffer = JS_GetUint8ArrayData(obj);
if (!buffer) {
FireInteralError(this, __LINE__);
return NS_ERROR_OUT_OF_MEMORY;
}
FallibleTArray<uint8_t> fallibleArr;
if (!fallibleArr.InsertElementsAt(0, buffer, nbytes)) {
FireInteralError(this, __LINE__);
return NS_ERROR_OUT_OF_MEMORY;
}
InfallibleTArray<uint8_t> arr;
arr.SwapElements(fallibleArr);
data = SendableData(arr);
} else {
nsDependentJSString message, filename;
uint32_t lineNumber = 0;
uint32_t columnNumber = 0;
jsval val;
if (!JS_GetProperty(aCx, obj, "message", &val)) {
NS_ERROR("No message property on supposed error object");
} else if (JSVAL_IS_STRING(val)) {
if (!message.init(aCx, JSVAL_TO_STRING(val))) {
NS_WARNING("couldn't initialize string");
}
}
if (!JS_GetProperty(aCx, obj, "fileName", &val)) {
NS_ERROR("No fileName property on supposed error object");
} else if (JSVAL_IS_STRING(val)) {
if (!filename.init(aCx, JSVAL_TO_STRING(val))) {
NS_WARNING("couldn't initialize string");
}
}
if (!JS_GetProperty(aCx, obj, "lineNumber", &val)) {
NS_ERROR("No lineNumber property on supposed error object");
} else if (JSVAL_IS_INT(val)) {
lineNumber = JSVAL_TO_INT(val);
}
if (!JS_GetProperty(aCx, obj, "columnNumber", &val)) {
NS_ERROR("No columnNumber property on supposed error object");
} else if (JSVAL_IS_INT(val)) {
columnNumber = JSVAL_TO_INT(val);
}
data = JSError(message, filename, lineNumber, columnNumber);
}
} else {
NS_ERROR("Unexpected JS value encountered");
FireInteralError(this, __LINE__);
return NS_ERROR_FAILURE;
}
mozilla::unused <<
PTCPSocketParent::SendCallback(nsString(aType), data,
nsString(aReadyState), aBuffered);
return NS_OK;
}
NS_IMETHODIMP
TCPSocketParent::SendCallback(const nsAString& aType, const JS::Value& aDataVal,
const nsAString& aReadyState, uint32_t aBuffered,
JSContext* aCx)
{
if (!mIPCOpen) {
NS_WARNING("Dropping callback due to no IPC connection");
return NS_OK;
}
CallbackData data;
if (aDataVal.isString()) {
JSString* jsstr = aDataVal.toString();
nsDependentJSString str;
if (!str.init(aCx, jsstr)) {
FireInteralError(this, __LINE__);
return NS_ERROR_OUT_OF_MEMORY;
}
data = SendableData(str);
} else if (aDataVal.isUndefined() || aDataVal.isNull()) {
data = mozilla::void_t();
} else if (aDataVal.isObject()) {
JSObject* obj = &aDataVal.toObject();
if (JS_IsArrayBufferObject(obj)) {
uint32_t nbytes = JS_GetArrayBufferByteLength(obj);
uint8_t* buffer = JS_GetArrayBufferData(obj);
if (!buffer) {
FireInteralError(this, __LINE__);
return NS_ERROR_OUT_OF_MEMORY;
}
FallibleTArray<uint8_t> fallibleArr;
if (!fallibleArr.InsertElementsAt(0, buffer, nbytes)) {
FireInteralError(this, __LINE__);
return NS_ERROR_OUT_OF_MEMORY;
}
InfallibleTArray<uint8_t> arr;
arr.SwapElements(fallibleArr);
data = SendableData(arr);
} else {
nsDependentJSString name;
JS::Rooted<JS::Value> val(aCx);
if (!JS_GetProperty(aCx, obj, "name", val.address())) {
NS_ERROR("No name property on supposed error object");
} else if (JSVAL_IS_STRING(val)) {
if (!name.init(aCx, JSVAL_TO_STRING(val))) {
NS_WARNING("couldn't initialize string");
}
}
data = TCPError(name);
}
} else {
NS_ERROR("Unexpected JS value encountered");
FireInteralError(this, __LINE__);
return NS_ERROR_FAILURE;
}
mozilla::unused <<
PTCPSocketParent::SendCallback(nsString(aType), data,
nsString(aReadyState), aBuffered);
return NS_OK;
}