使用 JVMTI 进行死锁检测
我想知道是否可以使用 JVMTI 动态检测 Java 中的死锁。有两个事件指示使用同步语句在监视器上执行的操作：
Monitor Contished Enter
当线程尝试进入另一个线程已获取的 Java 编程语言监视器时发送。
监控已输入的争用
当线程等待另一个线程释放后进入 Java 编程语言监视器时发送。
这意味着，使用 JVMTI 我只能看到那些已经锁定的监视器。我想重建一个等待图，但没有事件指示我，已获取一个锁，该锁不由任何线程持有。这是不可能的。
还有其他选择吗？ Unix 上的 SIGQUIT 命令允许显示死锁的线程转储，这在 JVMTI 中似乎是不可能的。
I wonder whether it is possible to detect deadlocks dynamically in Java by using the JVMTI. There are two events indicating actions on monitors using the synchronized statement:
Monitor Contended Enter
Sent when a thread is attempting to enter a Java programming language monitor already acquired by another thread.
Monitor Contended Entered
Sent when a thread enters a Java programming language monitor after waiting for it to be released by another thread.
This means, with JVMTI I can only see those monitors which are already locked. I wanted to reconstruct a wait-for graph, but without events indicating me, that a lock was acquired which is not held by any thread. This is impossible.
Are there alternatives? The SIGQUIT command on Unix allows a thread dump which displays the deadlocks, it seems like this is not possible within JVMTI.
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您应该能够通过 JMX 获取此信息。
尝试
You should be able to get this information via JMX.
Try