C ++中的数据部分 [英] data section in C++
问题描述
我有一个问题要澄清我对C ++中计算机内存组织的困惑.
I have a question to clarify my confusion about the memory organization in computer in C++.
在C ++中，不同的数据放置在不同的位置.我的理解就是这样.
In C++, different data is put in different location. My understanding is like this.
1)数据段部分，其中包含全局和静态数据；
1) data segment section, where global and static data are located;
2)堆部分，由新创建的对象
2) heap section, the objects created by new
3)堆栈部分，局部变量
3) stack section, the local variable
4)文本部分，代码本身.
4) text section, the code itself.
是吗?有什么我想念或做错的事吗?
Is that right? Is there anything I missed or did wrong?
谢谢！
推荐答案
I wrote an article called "C++ Internals :: Memory Layout" which will clarify this for you.
文章摘录:
.text segment
这是一个只读固定大小的细分.
It's a Read-Only, fixed-size segment.
文本段(也称为代码段)包含编译器和汇编器提供的可执行指令.
The text segment, a.k.a. code segment, contains executable instructions provided by the compiler and assembler.
.data segment
这是一个读写固定大小的细分.
It's a Read-Write, fixed-size segment.
数据段(也称为初始化数据段)包含已初始化:
The data segment, a.k.a. initialized data segment, contains initialized:
- 全局变量(包括全局静态变量)
- 静态局部变量.
段的大小取决于源代码中值的大小，可以在运行时更改这些值.
The segment's size depends on the size of the values in the source code, the values can be altered at run-time.
.rdata/.rodata segment
这是一个只读细分
这些段包含静态的未命名数据(如字符串常量)
The segments contains static unnamed data (like string constants)
.bss segment
这是读写，与.data段相邻.
It's a Read-Write and adjacent to the .data segment.
BSS段，也就是未初始化的数据段，包含在程序启动时仅由零值位表示的静态分配的变量(全局和静态). BSS代表以符号开头的块，这是一个伪操作，存在于为IBM开发的非常古老的汇编程序中.
BSS segment, a.k.a. uninitialized data segment, contains statically-allocated (global and static) variables represented solely by zero-valued bits on program start. BSS stands for Block Started by Symbol, a pseudo-operation that existed in a very old assembler developed for the IBM.
heap& stack
您对这些说的很对.无论如何，如果您想查看一些示例并仔细查看，请参考所提到的文章.
You are quite right about those. Anyway, if you want to check some examples and get a closer look, please, refer to mentioned article.
这篇关于C ++中的数据部分的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
