Memory image of C program in Linux environment

Memory image of C program in Linux environment

In the Linux environment, the memory image of a C program refers to the layout and organization of the program in memory. Understanding the memory image of a C program is very important for memory management, debugging, and performance optimization. This article will introduce the memory image of C program under Linux in detail, and provide corresponding source code examples.

The memory image of a C program can be divided into the following parts:

1. Code segment (Text Segment):
   The code segment is the area where the binary instructions of the program are stored. It is usually read-only because a program should not modify its own instructions while it is running. Code segments are usually shared, that is, multiple processes can share the same code segment, which can save memory space. The starting address of the code segment is fixed and determined by the operating system when loading the program.

Here is a simple C program example showing the contents of the code segment:

#include <stdio.h>

int main() {
   
    
    
    printf("Hello, Wor