dherman/v8_trace.md

## v8_trace.md

      
    Raw
  

              v8_trace.md
            
          
    Why doesn't this throw an exception?
SOLVED: It checks the length and returns without throwing in NEW_STRING
  } else if (length > i::String::kMaxLength) {                             \
    result = MaybeLocal<String>();                                         \
ASSERTION: DCHECK((isolate)->has_pending_exception())
TRACE:

 ASSIGN_RETURN_ON_EXCEPTION_VALUE(..)
 DCHECK((isolate)->has_pending_exception()); \


  ASSIGN_RETURN_ON_EXCEPTION(..)
  ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, dst, call, MaybeHandle<T>())


 MaybeHandle<String> Factory::NewStringFromUtf8(Vector, PretenureFlag)
  ASSIGN_RETURN_ON_EXCEPTION(
      isolate(), result,
      NewRawTwoByteString(non_ascii_start + utf16_length, pretenure), String);


 i::MaybeHandle<i::String> NewString(i::Factory *, v8::NewStringType, i::Vector<const char>)
  return factory->NewStringFromUtf8(string);


 NEW_STRING(..)
        NewString(i_isolate->factory(), type,                              \
                  i::Vector<const Char>(data, length))                     \


 Local<String> String::NewFromUtf8(Isolate *, const char *, NewStringType, int)
  NEW_STRING(isolate, String, NewFromUtf8, char, data,
             static_cast<v8::NewStringType>(type), length);