SystemRuntimeMacOSX::ItemInfo
SystemRuntimeMacOSX::ExtractItemInfoFromBuffer (lldb_private::DataExtractor &extractor)
{
    ItemInfo item;

    offset_t offset = 0;

    item.item_that_enqueued_this = extractor.GetPointer (&offset);
    item.function_or_block = extractor.GetPointer (&offset);
    item.enqueuing_thread_id = extractor.GetU64 (&offset);
    item.enqueuing_queue_serialnum = extractor.GetU64 (&offset);
    item.target_queue_serialnum = extractor.GetU64 (&offset);
    item.enqueuing_callstack_frame_count = extractor.GetU32 (&offset);
    item.stop_id = extractor.GetU32 (&offset);

    offset = m_lib_backtrace_recording_info.item_info_data_offset;

    for (uint32_t i = 0; i < item.enqueuing_callstack_frame_count; i++)
    {
        item.enqueuing_callstack.push_back (extractor.GetPointer (&offset));
    }
    item.enqueuing_thread_label = extractor.GetCStr (&offset);
    item.enqueuing_queue_label = extractor.GetCStr (&offset);
    item.target_queue_label = extractor.GetCStr (&offset);

    return item;
}