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问题描述
在我自己的分析器上工作，我想解释一下我所看到的.即使在最简单的程序中，也会始终出现一些默认线程:
Working on a profiler of my own, I would like to explain what I see. There are some default threads which always appear, even in the simplest program:
- 销毁JavaVM
- 信号调度器
- 终结器
- 引用处理程序
虽然他们的名字很自证，但我想了解更多信息.这些线程似乎没有记录，是否有人知道挖掘这些信息的来源，甚至确切地知道这些线程的作用?
Although their names are quite self-documenting, I would like to get a little bit more information. It seems these threads are not documented, does someone know a source to dig for these information or even knows exactly what these threads do?
推荐答案
- DestroyJavaVM 是在程序中卸载 Java VM 的线程出口.大多数情况下，它应该等待，直到您的虚拟机出现末日.
- Signal Dispatcher 是一个线程，用于处理操作系统发送到 jvm 的本机信号.
- 终结器线程从终结队列中拉取对象并调用它的终结方法.
- Reference Handler 是一个高优先级线程，用于将待处理的 参考文献.它在 java.lang.ref.References.java 中定义
- DestroyJavaVM is a thread that unloads the Java VM on program exit. Most of the time it should be waiting, until apocalypse of your VM.
- Signal Dispatcher is a thread that handles the native signals sent by the OS to your jvm.
- Finalizer threads pull objects from the finalization queue and calls it finalize method.
- Reference Handler is a high-priority thread to enqueue pending References. Its defined in java.lang.ref.References.java
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