GetTaskStateFromAddress.cs

private static ulong GetTaskStateFromAddress(ulong address)
{
    var type = Runtime.GetHeap().GetObjectType(address);

    if ((type != null) && (type.Name.StartsWith("System.Threading.Task")))
    {
        // try to get the m_stateFlags field value
        ClrInstanceField field = type.GetFieldByName("m_stateFlags");
        if (field != null)
        {
            var val = field.GetValue(address);
            if (val != null)
            {
                try
                {
                    return (ulong)(int)val;
                }
                catch (InvalidCastException)
                {
                }
            }
        }
    }

    return 0;
}