gdb调试 main 函数参数设置_gdb 如何main函数-优快云博客

本文链接：https://blog.youkuaiyun.com/dashuliu/article/details/4363450

本文通过一个C语言示例程序介绍了如何使用命令行参数。该程序演示了如何获取并打印出传递给程序的所有命令行参数，包括程序名本身。

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例子：

#include <stdio.h>

int main(int argc,char *argv[])
{
    int i = argc;
    printf("argc:%d/n",i);
        for(i = 0;i < argc;i++)
        printf("argv[%d]:%s/n",i,argv[i]);
        return 1;
}

输出：

[root@(none) ~]# gcc -g -o main main.c
[root@(none) ~]# ./main a b c
argc:4
argv[0]:./main
argv[1]:a
argv[2]:b
argv[3]:c

调试：

[root@(none) ~]# gdb main
GNU gdb Red Hat Linux (6.6-8.fc7rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) set args a b c
(gdb) r
Starting program: /root/main a b c
argc:4
argv[0]:/root/main
argv[1]:a
argv[2]:b
argv[3]:c

Program exited with code 01.
(gdb)