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);
}
static void messageHandlerInWorker(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)
{
static bool isReportingException = false;
// Exceptions that occur in error handler should be ignored since in that case
// WorkerGlobalScope::reportException will send the exception to the worker object.
if (isReportingException)
return;
isReportingException = true;
// During the frame teardown, there may not be a valid context.
if (ScriptExecutionContext* context = getScriptExecutionContext()) {
String errorMessage = toWebCoreString(message->Get());
String sourceURL = toWebCoreString(message->GetScriptResourceName());
RefPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, sourceURL, message->GetLineNumber(), message->GetStartColumn());
v8::Local<v8::Value> wrappedEvent = toV8(event.get(), v8::Handle<v8::Object>(), v8::Isolate::GetCurrent());
if (!wrappedEvent.IsEmpty()) {
ASSERT(wrappedEvent->IsObject());
v8::Local<v8::Object>::Cast(wrappedEvent)->SetHiddenValue(V8HiddenPropertyName::error(), data);
}
AccessControlStatus corsStatus = message->IsSharedCrossOrigin() ? SharableCrossOrigin : NotSharableCrossOrigin;
context->reportException(event.release(), 0, corsStatus);
}
isReportingException = false;
}
static void messageHandlerInMainThread(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)
{
DOMWindow* firstWindow = firstDOMWindow();
if (!firstWindow->isCurrentlyDisplayedInFrame())
return;
String errorMessage = toWebCoreString(message->Get());
v8::Handle<v8::StackTrace> stackTrace = message->GetStackTrace();
RefPtr<ScriptCallStack> callStack;
// Currently stack trace is only collected when inspector is open.
if (!stackTrace.IsEmpty() && stackTrace->GetFrameCount() > 0)
callStack = createScriptCallStack(stackTrace, ScriptCallStack::maxCallStackSizeToCapture);
v8::Handle<v8::Value> resourceName = message->GetScriptResourceName();
bool shouldUseDocumentURL = resourceName.IsEmpty() || !resourceName->IsString();
String resource = shouldUseDocumentURL ? firstWindow->document()->url() : toWebCoreString(resourceName);
RefPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, resource, message->GetLineNumber(), message->GetStartColumn());
// messageHandlerInMainThread can be called while we're creating a new context.
// Since we cannot create a wrapper in the intermediate timing, we need to skip
// creating a wrapper for |event|.
DOMWrapperWorld* world = DOMWrapperWorld::current();
Frame* frame = firstWindow->document()->frame();
if (world && frame && frame->script()->existingWindowShell(world)) {
v8::Local<v8::Value> wrappedEvent = toV8(event.get(), v8::Handle<v8::Object>(), v8::Isolate::GetCurrent());
if (!wrappedEvent.IsEmpty()) {
ASSERT(wrappedEvent->IsObject());
v8::Local<v8::Object>::Cast(wrappedEvent)->SetHiddenValue(V8HiddenPropertyName::error(), data);
}
}
AccessControlStatus corsStatus = message->IsSharedCrossOrigin() ? SharableCrossOrigin : NotSharableCrossOrigin;
firstWindow->document()->reportException(event.release(), callStack, corsStatus);
}
static void AppendExceptionLine(Environment* env, v8::Handle<v8::Value> er, v8::Handle<v8::Message> message)
{
if (message.IsEmpty())
return;
v8::HandleScope scope(env->isolate());
v8::Local<v8::Object> err_obj;
if (!er.IsEmpty() && er->IsObject()) {
err_obj = er.As<v8::Object>();
// Do it only once per message
if (!err_obj->GetHiddenValue(env->processed_string()).IsEmpty())
return;
err_obj->SetHiddenValue(env->processed_string(), True(env->isolate()));
}
static char arrow[1024];
// Print (filename):(line number): (message).
v8::String::Utf8Value filename(message->GetScriptResourceName());
const char* filename_string = *filename;
int linenum = message->GetLineNumber();
// Print line of source code.
v8::String::Utf8Value sourceline(message->GetSourceLine());
const char* sourceline_string = *sourceline;
// Because of how node modules work, all scripts are wrapped with a
// "function (module, exports, __filename, ...) {"
// to provide script local variables.
//
// When reporting errors on the first line of a script, this wrapper
// function is leaked to the user. There used to be a hack here to
// truncate off the first 62 characters, but it caused numerous other
// problems when vm.runIn*Context() methods were used for non-module
// code.
//
// If we ever decide to re-instate such a hack, the following steps
// must be taken:
//
// 1. Pass a flag around to say "this code was wrapped"
// 2. Update the stack frame output so that it is also correct.
//
// It would probably be simpler to add a line rather than add some
// number of characters to the first line, since V8 truncates the
// sourceline to 78 characters, and we end up not providing very much
// useful debugging info to the user if we remove 62 characters.
int start = message->GetStartColumn();
int end = message->GetEndColumn();
int off = snprintf(arrow, sizeof(arrow), "%s:%i\n%s\n", filename_string, linenum, sourceline_string);
assert(off >= 0);
// Print wavy underline (GetUnderline is deprecated).
for (int i = 0; i < start; i++) {
if (sourceline_string[i] == '\0' || static_cast<size_t>(off) >= sizeof(arrow)) {
break;
}
assert(static_cast<size_t>(off) < sizeof(arrow));
arrow[off++] = (sourceline_string[i] == '\t') ? '\t' : ' ';
}
for (int i = start; i < end; i++) {
if (sourceline_string[i] == '\0' || static_cast<size_t>(off) >= sizeof(arrow)) {
break;
}
assert(static_cast<size_t>(off) < sizeof(arrow));
arrow[off++] = '^';
}
assert(static_cast<size_t>(off - 1) <= sizeof(arrow) - 1);
arrow[off++] = '\n';
arrow[off] = '\0';
v8::Local<v8::String> arrow_str = v8::String::NewFromUtf8(env->isolate(), arrow);
v8::Local<v8::Value> msg;
v8::Local<v8::Value> stack;
// Allocation failed, just print it out
if (arrow_str.IsEmpty() || err_obj.IsEmpty() || !err_obj->IsNativeError())
goto print;
msg = err_obj->Get(env->message_string());
stack = err_obj->Get(env->stack_string());
if (msg.IsEmpty() || stack.IsEmpty())
goto print;
err_obj->Set(env->message_string(), v8::String::Concat(arrow_str, msg->ToString()));
err_obj->Set(env->stack_string(), v8::String::Concat(arrow_str, stack->ToString()));
return;
print: if (env->printed_error())
return;
env->set_printed_error(true);
// uv_tty_reset_mode();
fprintf(stderr, "\n%s", arrow);
}