哪里的方法存储在内存中？ [英] Where are methods stored in memory?

问题描述

我了解到，类字段存储在堆中，哪来的方法存储在哪里？在堆或其他地方？他们是内联？

I learned that class fields are stored in the heap, but where are methods stored? In the heap or somewhere else? are they inline?

推荐答案

方法都存在别处在内存中。请注意，方法是每一个类，而不是每个实例。因此通常，方法的数目超过一个程序的运行时不改变（也有例外）。在传统的模式，这里的方法居住的地方被称为code段。在.NET中，这是比较难：该方法最初住在组装，并获得映射到进程的内存。在那里，刚刚即时编译器创建的本地code一些方法的第二个副本;这个副本被执行。在JIT code可能会建立和运行过程中删除了好几次，所以这是可行的，在堆也认为这是生活。

Methods are stored somewhere else in the memory. Notice that methods are per-class, not per-instance. So typically, the number of methods doesn't change over the run-time of a program (there are exceptions). In traditional models, the place where the methods live is called the "code segment". In .net, it's more difficult: the methods originally live in the assembly, and get mapped into the process memory. There, the just-in-time compiler creates a second copy of some methods in native code; this copy gets executed. The JIT code may get created and deleted several times during the runtime, so it is practical to view it also as living "in Heap".

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