如何找到当前持有java.util.concurrent.Semaphore允许的线程？(How to find which threads currently hold java.util.concurrent.Semaphore permits?)

 我试图分析一个线程转储，它似乎表明有许多线程正在等待java.util.concurrent.Semaphore允许，即线程正在等待Semaphore.acquire（）。 
 
 我能够暗示因为线程处于WAITING（停放）状态，而且据我所知 ，Semaphore不使用LOCK监视器，而是使用LockSupport.park（）代替，等待另一个线程取消它。 
 
 现在，有没有办法从线程转储中暗示所有线程当前持有Semaphore允许的内容？ 
 
 类似于在BLOCKED状态下查找线程，并检查哪个是持有LOCK的线程导致线程阻塞？ 

I am trying to analyze a thread dump which seems to indicate that there are numerous threads that are waiting on java.util.concurrent.Semaphore permits, i.e., the threads are waiting on Semaphore.acquire().
 
This I was able to imply because the threads are in WAITING (parking) state, and from what I've understood, Semaphore's do not use LOCK monitors, but use LockSupport.park() instead, waiting on another thread to unpark it.
 
Now, is there a way to imply from a thread dump on what all threads currently hold the Semaphore permits?
 
Similar to finding threads in BLOCKED state, and check which is the thread that holds the LOCK which is causing the thread to BLOCK?

原文：https://stackoverflow.com/questions/35159122