void
SystemRuntimeMacOSX::PopulateQueueList (lldb_private::QueueList &queue_list)
{
if (BacktraceRecordingHeadersInitialized())
{
AppleGetQueuesHandler::GetQueuesReturnInfo queue_info_pointer;
ThreadSP cur_thread_sp (m_process->GetThreadList().GetSelectedThread());
if (cur_thread_sp)
{
Error error;
queue_info_pointer = m_get_queues_handler.GetCurrentQueues (*cur_thread_sp.get(), m_page_to_free, m_page_to_free_size, error);
m_page_to_free = LLDB_INVALID_ADDRESS;
m_page_to_free_size = 0;
if (error.Success())
{
if (queue_info_pointer.count > 0
&& queue_info_pointer.queues_buffer_size > 0
&& queue_info_pointer.queues_buffer_ptr != 0
&& queue_info_pointer.queues_buffer_ptr != LLDB_INVALID_ADDRESS)
{
PopulateQueuesUsingLibBTR (queue_info_pointer.queues_buffer_ptr, queue_info_pointer.queues_buffer_size, queue_info_pointer.count, queue_list);
}
}
}
}
// We either didn't have libBacktraceRecording (and need to create the queues list based on threads)
// or we did get the queues list from libBacktraceRecording but some special queues may not be
// included in its information. This is needed because libBacktraceRecording
// will only list queues with pending or running items by default - but the magic com.apple.main-thread
// queue on thread 1 is always around.
for (ThreadSP thread_sp : m_process->Threads())
{
if (thread_sp->GetQueueID() != LLDB_INVALID_QUEUE_ID)
{
if (queue_list.FindQueueByID (thread_sp->GetQueueID()).get() == NULL)
{
QueueSP queue_sp (new Queue(m_process->shared_from_this(), thread_sp->GetQueueID(), thread_sp->GetQueueName()));
queue_sp->SetKind (GetQueueKind (thread_sp->GetQueueLibdispatchQueueAddress()));
queue_sp->SetLibdispatchQueueAddress (thread_sp->GetQueueLibdispatchQueueAddress());
queue_list.AddQueue (queue_sp);
}
}
}
}
void
SystemRuntimeMacOSX::PopulateQueueList (lldb_private::QueueList &queue_list)
{
// For now, iterate over the threads and see what queue each thread is associated with.
// If we haven't already added this queue, add it to the QueueList.
// (a single libdispatch queue may be using multiple threads simultaneously.)
for (ThreadSP thread_sp : m_process->Threads())
{
if (thread_sp->GetQueueID() != LLDB_INVALID_QUEUE_ID)
{
if (queue_list.FindQueueByID (thread_sp->GetQueueID()).get() == NULL)
{
QueueSP queue_sp (new Queue(m_process->shared_from_this(), thread_sp->GetQueueID(), thread_sp->GetQueueName()));
queue_list.AddQueue (queue_sp);
}
}
}
}
void
SystemRuntimeMacOSX::PopulateQueuesUsingLibBTR (lldb::addr_t queues_buffer, uint64_t queues_buffer_size,
uint64_t count, lldb_private::QueueList &queue_list)
{
Error error;
DataBufferHeap data (queues_buffer_size, 0);
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SYSTEM_RUNTIME));
if (m_process->ReadMemory (queues_buffer, data.GetBytes(), queues_buffer_size, error) == queues_buffer_size && error.Success())
{
// We've read the information out of inferior memory; free it on the next call we make
m_page_to_free = queues_buffer;
m_page_to_free_size = queues_buffer_size;
DataExtractor extractor (data.GetBytes(), data.GetByteSize(), m_process->GetByteOrder(), m_process->GetAddressByteSize());
offset_t offset = 0;
uint64_t queues_read = 0;
// The information about the queues is stored in this format (v1):
// typedef struct introspection_dispatch_queue_info_s {
// uint32_t offset_to_next;
// dispatch_queue_t queue;
// uint64_t serialnum; // queue's serialnum in the process, as provided by libdispatch
// uint32_t running_work_items_count;
// uint32_t pending_work_items_count;
//
// char data[]; // Starting here, we have variable-length data:
// // char queue_label[];
// } introspection_dispatch_queue_info_s;
while (queues_read < count && offset < queues_buffer_size)
{
offset_t start_of_this_item = offset;
uint32_t offset_to_next = extractor.GetU32 (&offset);
offset += 4; // Skip over the 4 bytes of reserved space
addr_t queue = extractor.GetPointer (&offset);
uint64_t serialnum = extractor.GetU64 (&offset);
uint32_t running_work_items_count = extractor.GetU32 (&offset);
uint32_t pending_work_items_count = extractor.GetU32 (&offset);
// Read the first field of the variable length data
offset = start_of_this_item + m_lib_backtrace_recording_info.queue_info_data_offset;
const char *queue_label = extractor.GetCStr (&offset);
if (queue_label == NULL)
queue_label = "";
offset_t start_of_next_item = start_of_this_item + offset_to_next;
offset = start_of_next_item;
if (log)
log->Printf ("SystemRuntimeMacOSX::PopulateQueuesUsingLibBTR added queue with dispatch_queue_t 0x%" PRIx64 ", serial number 0x%" PRIx64 ", running items %d, pending items %d, name '%s'", queue, serialnum, running_work_items_count, pending_work_items_count, queue_label);
QueueSP queue_sp (new Queue (m_process->shared_from_this(), serialnum, queue_label));
queue_sp->SetNumRunningWorkItems (running_work_items_count);
queue_sp->SetNumPendingWorkItems (pending_work_items_count);
queue_sp->SetLibdispatchQueueAddress (queue);
queue_sp->SetKind (GetQueueKind (queue));
queue_list.AddQueue (queue_sp);
queues_read++;
}
}
}