是否允许主线程在进入 main() 之前生成 POSIX 线程?

Update: Also added a print statement to the first line of the constructor (so before pthread_create is called), and not even that gets printed before the segfault BUT the constructor does use an initialization list so it is possible something there is causing it?

这里是构造函数:

worker::worker(size_t buffer_size):
m_head(nullptr),m_tail(nullptr),
m_buffer_A(operator new(buffer_size)),
m_buffer_B(operator new(buffer_size)),
m_next(m_buffer_A),
m_buffer_size(buffer_size),
m_pause_gate(true),
m_worker_thread([this]()->void{ thread_func(); }),
m_running(true)
{
    print("this wont get printed b4 segfault");
    scoped_lock lock(worker_lock);
    m_worker_thread.start();
    all_workers.push_back(this);
}

和析构函数:

worker::~worker()
{
    {
        scoped_lock lock(worker_lock);
        auto w=all_workers.begin();
        while(w!=all_workers.end())
        {
            if(*w==this)
            {
                break;
            }
            ++w;
        }
        all_workers.erase(w);
    }

    {
        scoped_lock lock(m_lock);
        m_running=false;
    }

    m_sem.release();
    m_pause_gate.open();

    m_worker_thread.join();

    operator delete(m_buffer_A);
    operator delete(m_buffer_B);
}

更新 2:

好的，我想通了.我的打印功能是原子的，同样使用在其他地方定义的外部命名空间范围互斥锁来保护 cout.我改为纯 cout 并打印在 ctor 的开头.显然，在尝试访问它们之前，这些静态存储持续时间互斥锁都没有被初始化.所以是的，这可能是凯西的答案.