c++ - C++中类的静态数据成员和静态方法是静态对象吗？

Question

摘自《编程语言语用学》，作者:Scott

Object lifetimes generally correspond to one of three principal storage allocation mechanisms, used to manage the object’s space:

1. Static objects are given an absolute address that is retained throughout the program’s execution.

2. Stack objects are allocated and deallocated in last-in, first-out order, usually in conjunction with subroutine calls and returns.

3. Heap objects may be allocated and deallocated at arbitrary times. They require a more general (and expensive) storage management algorithm.

类的静态数据成员和静态方法是在 PLP 书中的 C++ 静态对象？

类的静态数据成员和静态方法的存储是在编译时还是运行时分配的？

它们分配在哪里？

谢谢。

Answer 1

Are the static data members and static methods of a class in C++ static objects in the PLP book?

静态数据成员，是的。函数内部的静态对象也是如此。也是在文件范围内声明的对象。

Are the storage for the static data members and static methods of a class allocated at compile time or run time?

如果按分配，你指的是内存分配，它们的内存占用是在编译时保留的，空间实际上是由链接器在链接时(或动态加载器在加载时)在进程空间中分配的。在任何一种情况下，都在运行时间之前。

但是，在文件或类范围内声明的静态对象在运行时初始化，在调用 main() 函数之前。

函数中定义的静态对象是不同的。它们在代码第一次流过它们时被初始化。

Where are they allocated?

无论链接器或加载器决定在哪里。这可能会受到编写您自己的链接器脚本的影响(恐怕超出了这个答案的范围)。