本机方法的源代码是否可用?

Is the source code of native methods available?(本机方法的源代码是否可用?)

问题描述

首先我想让你知道这个问题与 什么是无关的Java 中的本机实现.我从该线程中获得了许多有用的信息.

At first I want to let you know that this question is not related with What is native implementation in Java. I got many useful information from that thread.

我想知道本地实现的代码是否可用?我有 jdk 源代码，但我找不到 System.currentTimeMillis 或 Runtime.getRuntime().availableProcessors() 或其他本机方法的本机代码.

I want to know that are the codes of the native implementations available? I have jdk source code but I can not find the native codes for System.currentTimeMillis or Runtime.getRuntime().availableProcessors() or other native method.

推荐答案

是的，见os::javaTimeMillis 在 /src/os/solaris/vm/os_solaris.cpp 中查看 Solaris例如实现.

Yes, see os::javaTimeMillis in /src/os/solaris/vm/os_solaris.cpp to see the Solaris implementation for instance.

有几层包装器可以到达那里，请参阅 JVM_CurrentTimeMillis 在 /src/share/vm/prims/jvm.cpp

There are a few layers of wrappers to get there though, see JVM_CurrentTimeMillis in /src/share/vm/prims/jvm.cpp

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