static void messageHandlerInMainThread(v8::Local<v8::Message> message,
v8::Local<v8::Value> data) {
ASSERT(isMainThread());
v8::Isolate* isolate = v8::Isolate::GetCurrent();
if (isolate->GetEnteredContext().IsEmpty())
return;
// If called during context initialization, there will be no entered context.
ScriptState* scriptState = ScriptState::current(isolate);
if (!scriptState->contextIsValid())
return;
ExecutionContext* context = scriptState->getExecutionContext();
std::unique_ptr<SourceLocation> location =
SourceLocation::fromMessage(isolate, message, context);
AccessControlStatus accessControlStatus = NotSharableCrossOrigin;
if (message->IsOpaque())
accessControlStatus = OpaqueResource;
else if (message->IsSharedCrossOrigin())
accessControlStatus = SharableCrossOrigin;
ErrorEvent* event =
ErrorEvent::create(toCoreStringWithNullCheck(message->Get()),
std::move(location), &scriptState->world());
String messageForConsole = extractMessageForConsole(isolate, data);
if (!messageForConsole.isEmpty())
event->setUnsanitizedMessage("Uncaught " + messageForConsole);
// This method might be called while we're creating a new context. In this
// case, we avoid storing the exception object, as we can't create a wrapper
// during context creation.
// FIXME: Can we even get here during initialization now that we bail out when
// GetEntered returns an empty handle?
if (context->isDocument()) {
LocalFrame* frame = toDocument(context)->frame();
if (frame && frame->script().existingWindowProxy(scriptState->world())) {
V8ErrorHandler::storeExceptionOnErrorEventWrapper(
scriptState, event, data, scriptState->context()->Global());
}
}
if (scriptState->world().isPrivateScriptIsolatedWorld()) {
// We allow a private script to dispatch error events even in a
// EventDispatchForbiddenScope scope. Without having this ability, it's
// hard to debug the private script because syntax errors in the private
// script are not reported to console (the private script just crashes
// silently). Allowing error events in private scripts is safe because
// error events don't propagate to other isolated worlds (which means that
// the error events won't fire any event listeners in user's scripts).
EventDispatchForbiddenScope::AllowUserAgentEvents allowUserAgentEvents;
context->dispatchErrorEvent(event, accessControlStatus);
} else {
context->dispatchErrorEvent(event, accessControlStatus);
}
}
static void messageHandlerInMainThread(v8::Local<v8::Message> message, v8::Local<v8::Value> data)
{
ASSERT(isMainThread());
v8::Isolate* isolate = v8::Isolate::GetCurrent();
// If called during context initialization, there will be no entered window.
LocalDOMWindow* enteredWindow = enteredDOMWindow(isolate);
if (!enteredWindow || !enteredWindow->isCurrentlyDisplayedInFrame())
return;
int scriptId = 0;
RefPtrWillBeRawPtr<ScriptCallStack> callStack = extractCallStack(isolate, message, &scriptId);
String resourceName = extractResourceName(message, enteredWindow->document());
AccessControlStatus accessControlStatus = NotSharableCrossOrigin;
if (message->IsOpaque())
accessControlStatus = OpaqueResource;
else if (message->IsSharedCrossOrigin())
accessControlStatus = SharableCrossOrigin;
ScriptState* scriptState = ScriptState::current(isolate);
String errorMessage = toCoreStringWithNullCheck(message->Get());
int lineNumber = 0;
int columnNumber = 0;
if (v8Call(message->GetLineNumber(scriptState->context()), lineNumber)
&& v8Call(message->GetStartColumn(scriptState->context()), columnNumber))
++columnNumber;
RefPtrWillBeRawPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, resourceName, lineNumber, columnNumber, &scriptState->world());
String messageForConsole = extractMessageForConsole(isolate, data);
if (!messageForConsole.isEmpty())
event->setUnsanitizedMessage("Uncaught " + messageForConsole);
// This method might be called while we're creating a new context. In this case, we
// avoid storing the exception object, as we can't create a wrapper during context creation.
// FIXME: Can we even get here during initialization now that we bail out when GetEntered returns an empty handle?
LocalFrame* frame = enteredWindow->document()->frame();
if (frame && frame->script().existingWindowProxy(scriptState->world())) {
V8ErrorHandler::storeExceptionOnErrorEventWrapper(isolate, event.get(), data, scriptState->context()->Global());
}
if (scriptState->world().isPrivateScriptIsolatedWorld()) {
// We allow a private script to dispatch error events even in a EventDispatchForbiddenScope scope.
// Without having this ability, it's hard to debug the private script because syntax errors
// in the private script are not reported to console (the private script just crashes silently).
// Allowing error events in private scripts is safe because error events don't propagate to
// other isolated worlds (which means that the error events won't fire any event listeners
// in user's scripts).
EventDispatchForbiddenScope::AllowUserAgentEvents allowUserAgentEvents;
enteredWindow->document()->reportException(event.release(), scriptId, callStack, accessControlStatus);
} else {
enteredWindow->document()->reportException(event.release(), scriptId, callStack, accessControlStatus);
}
}
static void messageHandlerInMainThread(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)
{
ASSERT(isMainThread());
// It's possible that messageHandlerInMainThread() is invoked while we're initializing a window.
// In that half-baked situation, we don't have a valid context nor a valid world,
// so just return immediately.
if (DOMWrapperWorld::windowIsBeingInitialized())
return;
v8::Isolate* isolate = v8::Isolate::GetCurrent();
// If called during context initialization, there will be no entered window.
LocalDOMWindow* enteredWindow = enteredDOMWindow(isolate);
if (!enteredWindow)
return;
String errorMessage = toCoreString(message->Get());
v8::Handle<v8::StackTrace> stackTrace = message->GetStackTrace();
RefPtr<ScriptCallStack> callStack = nullptr;
int scriptId = message->GetScriptOrigin().ScriptID()->Value();
// Currently stack trace is only collected when inspector is open.
if (!stackTrace.IsEmpty() && stackTrace->GetFrameCount() > 0) {
callStack = createScriptCallStack(stackTrace, ScriptCallStack::maxCallStackSizeToCapture, isolate);
bool success = false;
int topScriptId = callStack->at(0).scriptId().toInt(&success);
if (success && topScriptId == scriptId)
scriptId = 0;
} else {
Vector<ScriptCallFrame> callFrames;
callStack = ScriptCallStack::create(callFrames);
}
v8::Handle<v8::Value> resourceName = message->GetScriptOrigin().ResourceName();
bool shouldUseDocumentURL = resourceName.IsEmpty() || !resourceName->IsString();
String resource = shouldUseDocumentURL ? enteredWindow->document()->url() : toCoreString(resourceName.As<v8::String>());
ScriptState* scriptState = ScriptState::current(isolate);
RefPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, resource, message->GetLineNumber(), message->GetStartColumn() + 1, &scriptState->world());
if (V8DOMWrapper::isDOMWrapper(data)) {
v8::Handle<v8::Object> obj = v8::Handle<v8::Object>::Cast(data);
const WrapperTypeInfo* type = toWrapperTypeInfo(obj);
if (V8DOMException::wrapperTypeInfo.isSubclass(type)) {
DOMException* exception = V8DOMException::toNative(obj);
if (exception && !exception->messageForConsole().isEmpty())
event->setUnsanitizedMessage("Uncaught " + exception->toStringForConsole());
}
}
// This method might be called while we're creating a new context. In this case, we
// avoid storing the exception object, as we can't create a wrapper during context creation.
// FIXME: Can we even get here during initialization now that we bail out when GetEntered returns an empty handle?
LocalFrame* frame = enteredWindow->document()->frame();
if (frame && frame->script().existingWindowProxy(scriptState->world())) {
V8ErrorHandler::storeExceptionOnErrorEventWrapper(event.get(), data, scriptState->context()->Global(), isolate);
}
enteredWindow->document()->reportException(event.release(), scriptId, callStack);
}
void V8HTMLElement::HTMLConstructor(
const v8::FunctionCallbackInfo<v8::Value>& info) {
DCHECK(info.IsConstructCall());
v8::Isolate* isolate = info.GetIsolate();
ScriptState* scriptState = ScriptState::current(isolate);
if (!RuntimeEnabledFeatures::customElementsV1Enabled() ||
!scriptState->world().isMainWorld()) {
V8ThrowException::throwTypeError(info.GetIsolate(), "Illegal constructor");
return;
}
LocalDOMWindow* window = scriptState->domWindow();
ScriptCustomElementDefinition* definition =
ScriptCustomElementDefinition::forConstructor(
scriptState, window->customElements(), info.NewTarget());
if (!definition) {
V8ThrowException::throwTypeError(isolate, "Illegal constructor");
return;
}
ExceptionState exceptionState(ExceptionState::ConstructionContext,
"HTMLElement", info.Holder(), isolate);
Element* element;
if (definition->constructionStack().isEmpty()) {
// This is an element being created with 'new' from script
element = definition->createElementForConstructor(*window->document());
} else {
element = definition->constructionStack().last();
if (element) {
// This is an element being upgraded that has called super
definition->constructionStack().last().clear();
} else {
// During upgrade an element has invoked the same constructor
// before calling 'super' and that invocation has poached the
// element.
exceptionState.throwDOMException(InvalidStateError,
"this instance is already constructed");
return;
}
}
const WrapperTypeInfo* wrapperType = element->wrapperTypeInfo();
v8::Local<v8::Object> wrapper = V8DOMWrapper::associateObjectWithWrapper(
isolate, element, wrapperType, info.Holder());
// If the element had a wrapper, we now update and return that
// instead.
v8SetReturnValue(info, wrapper);
wrapper->SetPrototype(scriptState->context(), definition->prototype())
.ToChecked();
}
V8DOMActivityLogger* V8DOMActivityLogger::currentActivityLoggerIfIsolatedWorld()
{
v8::Isolate* isolate = v8::Isolate::GetCurrent();
if (!isolate->InContext())
return 0;
ScriptState* scriptState = ScriptState::current(isolate);
if (!scriptState->world().isIsolatedWorld())
return 0;
V8PerContextData* contextData = scriptState->perContextData();
if (!contextData)
return 0;
return contextData->activityLogger();
}
V8DOMActivityLogger* V8DOMActivityLogger::currentActivityLoggerIfIsolatedWorld()
{
v8::Isolate* isolate = v8::Isolate::GetCurrent();
if (!isolate->InContext())
return 0;
v8::HandleScope handleScope(isolate);
v8::Local<v8::Context> context = isolate->GetCurrentContext();
if (context.IsEmpty() || !toDOMWindow(context))
return 0;
ScriptState* scriptState = ScriptState::from(context);
if (!scriptState->world().isIsolatedWorld())
return 0;
V8PerContextData* contextData = scriptState->perContextData();
if (!contextData)
return 0;
return contextData->activityLogger();
}
static void messageHandlerInWorker(v8::Local<v8::Message> message,
v8::Local<v8::Value> data) {
v8::Isolate* isolate = v8::Isolate::GetCurrent();
V8PerIsolateData* perIsolateData = V8PerIsolateData::from(isolate);
// During the frame teardown, there may not be a valid context.
ScriptState* scriptState = ScriptState::current(isolate);
if (!scriptState->contextIsValid())
return;
// Exceptions that occur in error handler should be ignored since in that case
// WorkerGlobalScope::dispatchErrorEvent will send the exception to the worker
// object.
if (perIsolateData->isReportingException())
return;
perIsolateData->setReportingException(true);
ExecutionContext* context = scriptState->getExecutionContext();
std::unique_ptr<SourceLocation> location =
SourceLocation::fromMessage(isolate, message, context);
ErrorEvent* event =
ErrorEvent::create(toCoreStringWithNullCheck(message->Get()),
std::move(location), &scriptState->world());
AccessControlStatus corsStatus = message->IsSharedCrossOrigin()
? SharableCrossOrigin
: NotSharableCrossOrigin;
// If execution termination has been triggered as part of constructing
// the error event from the v8::Message, quietly leave.
if (!isolate->IsExecutionTerminating()) {
V8ErrorHandler::storeExceptionOnErrorEventWrapper(
scriptState, event, data, scriptState->context()->Global());
scriptState->getExecutionContext()->dispatchErrorEvent(event, corsStatus);
}
perIsolateData->setReportingException(false);
}
// https://html.spec.whatwg.org/multipage/dom.html#html-element-constructors
void V8HTMLConstructor::htmlConstructor(
const v8::FunctionCallbackInfo<v8::Value>& info,
const WrapperTypeInfo& wrapperTypeInfo,
const HTMLElementType elementInterfaceName) {
TRACE_EVENT0("blink", "HTMLConstructor");
DCHECK(info.IsConstructCall());
v8::Isolate* isolate = info.GetIsolate();
ScriptState* scriptState = ScriptState::current(isolate);
v8::Local<v8::Value> newTarget = info.NewTarget();
if (!scriptState->contextIsValid()) {
V8ThrowException::throwError(isolate, "The context has been destroyed");
return;
}
if (!RuntimeEnabledFeatures::customElementsV1Enabled() ||
!scriptState->world().isMainWorld()) {
V8ThrowException::throwTypeError(isolate, "Illegal constructor");
return;
}
// 2. If NewTarget is equal to the active function object, then
// throw a TypeError and abort these steps.
v8::Local<v8::Function> activeFunctionObject =
scriptState->perContextData()->constructorForType(
&V8HTMLElement::wrapperTypeInfo);
if (newTarget == activeFunctionObject) {
V8ThrowException::throwTypeError(isolate, "Illegal constructor");
return;
}
LocalDOMWindow* window = scriptState->domWindow();
CustomElementRegistry* registry = window->customElements();
// 3. Let definition be the entry in registry with constructor equal to
// NewTarget.
// If there is no such definition, then throw a TypeError and abort these
// steps.
ScriptCustomElementDefinition* definition =
ScriptCustomElementDefinition::forConstructor(scriptState, registry,
newTarget);
if (!definition) {
V8ThrowException::throwTypeError(isolate, "Illegal constructor");
return;
}
const AtomicString& localName = definition->descriptor().localName();
const AtomicString& name = definition->descriptor().name();
if (localName == name) {
// Autonomous custom element
// 4.1. If the active function object is not HTMLElement, then throw a
// TypeError
if (!V8HTMLElement::wrapperTypeInfo.equals(&wrapperTypeInfo)) {
V8ThrowException::throwTypeError(isolate,
"Illegal constructor: autonomous custom "
"elements must extend HTMLElement");
return;
}
} else {
// Customized built-in element
// 5. If local name is not valid for interface, throw TypeError
if (htmlElementTypeForTag(localName) != elementInterfaceName) {
V8ThrowException::throwTypeError(isolate,
"Illegal constructor: localName does "
"not match the HTML element interface");
return;
}
}
ExceptionState exceptionState(isolate, ExceptionState::ConstructionContext,
"HTMLElement");
v8::TryCatch tryCatch(isolate);
// 6. Let prototype be Get(NewTarget, "prototype"). Rethrow any exceptions.
v8::Local<v8::Value> prototype;
v8::Local<v8::String> prototypeString = v8AtomicString(isolate, "prototype");
if (!v8Call(newTarget.As<v8::Object>()->Get(scriptState->context(),
prototypeString),
prototype)) {
return;
}
// 7. If Type(prototype) is not Object, then: ...
if (!prototype->IsObject()) {
if (V8PerContextData* perContextData = V8PerContextData::from(
newTarget.As<v8::Object>()->CreationContext())) {
prototype =
perContextData->prototypeForType(&V8HTMLElement::wrapperTypeInfo);
} else {
V8ThrowException::throwError(isolate, "The context has been destroyed");
return;
}
}
// 8. If definition's construction stack is empty...
Element* element;
if (definition->constructionStack().isEmpty()) {
// This is an element being created with 'new' from script
element = definition->createElementForConstructor(*window->document());
} else {
element = definition->constructionStack().last();
if (element) {
// This is an element being upgraded that has called super
definition->constructionStack().last().clear();
} else {
// During upgrade an element has invoked the same constructor
// before calling 'super' and that invocation has poached the
// element.
exceptionState.throwDOMException(InvalidStateError,
"this instance is already constructed");
return;
}
}
const WrapperTypeInfo* wrapperType = element->wrapperTypeInfo();
v8::Local<v8::Object> wrapper = V8DOMWrapper::associateObjectWithWrapper(
isolate, element, wrapperType, info.Holder());
// If the element had a wrapper, we now update and return that
// instead.
v8SetReturnValue(info, wrapper);
// 11. Perform element.[[SetPrototypeOf]](prototype). Rethrow any exceptions.
// Note: I don't think this prototype set *can* throw exceptions.
wrapper->SetPrototype(scriptState->context(), prototype.As<v8::Object>())
.ToChecked();
}