C++ POSIXThread类代码示例

Error
ProcessPOSIX::DoDetach(bool keep_stopped)
{
    Error error;
    if (keep_stopped)
    {
        // FIXME: If you want to implement keep_stopped,
        // this would be the place to do it.
        error.SetErrorString("Detaching with keep_stopped true is not currently supported on this platform.");
        return error;
    }

    Mutex::Locker lock(m_thread_list.GetMutex());

    uint32_t thread_count = m_thread_list.GetSize(false);
    for (uint32_t i = 0; i < thread_count; ++i)
    {
        POSIXThread *thread = static_cast<POSIXThread*>(
            m_thread_list.GetThreadAtIndex(i, false).get());
        error = m_monitor->Detach(thread->GetID());
    }

    if (error.Success())
        SetPrivateState(eStateDetached);

    return error;
}

// ProcessPOSIX override
void
ProcessLinux::StopAllThreads(lldb::tid_t stop_tid)
{
    // If a breakpoint occurs while we're stopping threads, we'll get back
    // here, but we don't want to do it again.  Only the MonitorChildProcess
    // thread calls this function, so we don't need to protect this flag.
    if (m_stopping_threads)
      return;
    m_stopping_threads = true;

    Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_PROCESS));
    if (log)
        log->Printf ("ProcessLinux::%s() stopping all threads", __FUNCTION__);

    // Walk the thread list and stop the other threads.  The thread that caused
    // the stop should already be marked as stopped before we get here.
    Mutex::Locker thread_list_lock(m_thread_list.GetMutex());

    uint32_t thread_count = m_thread_list.GetSize(false);
    for (uint32_t i = 0; i < thread_count; ++i)
    {
        POSIXThread *thread = static_cast<POSIXThread*>(
            m_thread_list.GetThreadAtIndex(i, false).get());
        assert(thread);
        lldb::tid_t tid = thread->GetID();
        if (!StateIsStoppedState(thread->GetState(), false))
            m_monitor->StopThread(tid);
    }

    m_stopping_threads = false;

    if (log)
        log->Printf ("ProcessLinux::%s() finished", __FUNCTION__);
}

void
ProcessPOSIX::RefreshStateAfterStop()
{
    Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_PROCESS));
    if (log && log->GetMask().Test(POSIX_LOG_VERBOSE))
        log->Printf ("ProcessPOSIX::%s(), message_queue size = %d", __FUNCTION__, (int)m_message_queue.size());

    Mutex::Locker lock(m_message_mutex);

    // This method used to only handle one message.  Changing it to loop allows
    // it to handle the case where we hit a breakpoint while handling a different
    // breakpoint.
    while (!m_message_queue.empty())
    {
        ProcessMessage &message = m_message_queue.front();

        // Resolve the thread this message corresponds to and pass it along.
        lldb::tid_t tid = message.GetTID();
        if (log)
            log->Printf ("ProcessPOSIX::%s(), message_queue size = %d, pid = %" PRIi64, __FUNCTION__, (int)m_message_queue.size(), tid);

        if (message.GetKind() == ProcessMessage::eNewThreadMessage)
        {
            if (log)
                log->Printf ("ProcessPOSIX::%s() adding thread, tid = %" PRIi64, __FUNCTION__, message.GetChildTID());
            lldb::tid_t child_tid = message.GetChildTID();
            ThreadSP thread_sp;
            thread_sp.reset(CreateNewPOSIXThread(*this, child_tid));

            Mutex::Locker lock(m_thread_list.GetMutex());

            m_thread_list.AddThread(thread_sp);
        }

        m_thread_list.RefreshStateAfterStop();

        POSIXThread *thread = static_cast<POSIXThread*>(
            GetThreadList().FindThreadByID(tid, false).get());
        if (thread)
            thread->Notify(message);

        if (message.GetKind() == ProcessMessage::eExitMessage)
        {
            // FIXME: We should tell the user about this, but the limbo message is probably better for that.
            if (log)
                log->Printf ("ProcessPOSIX::%s() removing thread, tid = %" PRIi64, __FUNCTION__, tid);

            Mutex::Locker lock(m_thread_list.GetMutex());

            ThreadSP thread_sp = m_thread_list.RemoveThreadByID(tid, false);
            thread_sp.reset();
            m_seen_initial_stop.erase(tid);
        }

        m_message_queue.pop();
    }
}

Error
ProcessPOSIX::DoResume()
{
    StateType state = GetPrivateState();

    assert(state == eStateStopped);

    SetPrivateState(eStateRunning);

    bool did_resume = false;

    Mutex::Locker lock(m_thread_list.GetMutex());

    uint32_t thread_count = m_thread_list.GetSize(false);
    for (uint32_t i = 0; i < thread_count; ++i)
    {
        POSIXThread *thread = static_cast<POSIXThread*>(
            m_thread_list.GetThreadAtIndex(i, false).get());
        did_resume = thread->Resume() || did_resume;
    }
    assert(did_resume && "Process resume failed!");

    return Error();
}

POSIXThread* POSIXThread__New_1(::uStatic* __this, ::uDelegate* callback)
{
    POSIXThread* inst = (POSIXThread*)::uAllocObject(sizeof(POSIXThread), POSIXThread__typeof());
    inst->_ObjInit_1(callback);
    return inst;
}