How to test multithreaded code in C++11?

I was reading this book called "C++ concurrency in action" by Anthony Williams. In the chapter on "Testing and debugging multithreaded applications" he talks about "Detecting Problems with a Special Library" where the library can tell about

• What's the order of mutexes called by a thread,
• Stopping all threads and running only one of them,
• Checking which threads are holding in which mutexes etc.

But he doesn't name the actual library. My question is what library is he talking about?