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悬非 发表于 2007-7-22 10:51

__FILE__,__LINE__,FUNCTION__实现代码跟踪调试（linux下c语言编程

[color=#295200][size=14pt][b]__FILE__,__LINE__,FUNCTION__实现代码跟踪调试（linux下c语言编程 ）[/b][/size][/color]                                                                                                           先看下简单的初始代码：注意其编译运行后的结果。

root@xuanfei-desktop:~/cpropram/2# cat global.h //头文件
#ifndef CLOBAL_H
        #define GLOBAL_H
        #include <stdio.h>
        int funca(void);
        int funcb(void);
#endif
root@xuanfei-desktop:~/cpropram/2# cat funca.c //函数a
#include "global.h"
int funca(void)
{
printf ("this is function\n");
return 0;
}
root@xuanfei-desktop:~/cpropram/2# cat funcb.c //函数b
#include "global.h"
int funcb(void)
{
printf ("this is function\n");
return 0;
}
root@xuanfei-desktop:~/cpropram/2# gcc -Wall funca.c funcb.c main.c //联合编译
root@xuanfei-desktop:~/cpropram/2# ./a.out //运行
this is main
this is function
this is main
this is function
this is main

相同结果很难让人看出那里出错，下面我们用用 __FILE__,__LINE__,__FUNCTION__加入代码，看看有什么区别吗.
把 __FILE__,__LINE__,__FUNCTION__加入到mail.c中
root@xuanfei-desktop:~/cpropram/2# cat main.c
#include "global.h"
int main(int argc, char **argv)
{
    printf("%s(%d)-%s: this is main\n",__FILE__,__LINE__,__FUNCTION__);
    funca();
    printf("%s(%d)-%s: this is main\n",__FILE__,__LINE__,__FUNCTION__);
    funcb();
    printf("%s(%d)-%s: this is main\n",__FILE__,__LINE__,__FUNCTION__);
    return 0;
}
root@xuanfei-desktop:~/cpropram/2# gcc -Wall funca.c funcb.c main.c
root@xuanfei-desktop:~/cpropram/2# ./a.out
main.c(4)-main: this is main
this is function
main.c(6)-main: this is main
this is function
main.c(8)-main: this is main

上面的结果main.c(4)-main:this is main 表示在mian.c源代码的第四行main函数里边打印出来的 this is main
那样的话就很方便的让程序员对自己的程序进行排错！
为了更方便的使用它我们可以通过在global.h代码中进行宏定义
root@xuanfei-desktop:~/cpropram/2# cat global.h
#ifndef CLOBAL_H
        #define GLOBAL_H
        #include <stdio.h>
        int funca(void);
        int funcb(void);
        #define DEBUGFMT  "%s(%d)-%s"
        #define DEBUGARGS __FILE__,__LINE__,__FUNCTION__
#endif
root@xuanfei-desktop:~/cpropram/2# cat funca.c
#include "global.h"
int funca(void)
{
printf (DEBUGFMT " this is function\n",DEBUGARGS);
return 0;
}
root@xuanfei-desktop:~/cpropram/2# cat funcb.c
#include "global.h"
int funcb(void)
{
printf (DEBUGFMT " this is function\n",DEBUGARGS);
return 0;
}
root@xuanfei-desktop:~/cpropram/2# cat main.c
#include "global.h"
int main(int argc, char **argv)
{
    printf(DEBUGFMT "this is main\n", DEBUGARGS);
    funca();
    printf(DEBUGFMT "this is main\n", DEBUGARGS);
    funcb();
    printf(DEBUGFMT "this is main\n", DEBUGARGS);
    return 0;
}
root@xuanfei-desktop:~/cpropram/2# gcc -Wall funca.c funcb.c main.c
root@xuanfei-desktop:~/cpropram/2# ./a.out
main.c(4)-mainthis is main
funca.c(4)-funca this is function
main.c(6)-mainthis is main
funcb.c(4)-funcb this is function
main.c(8)-mainthis is main
root@xuanfei-desktop:~/cpropram/2#

这就是通过定义__FILE__,__LINE__,FUNCTION__的宏来简单实现代码的跟踪调试：）

如上内容根据周立发linux视频教程所做的笔录，为了方便大家理解，建议大家可以到下面的连接下载观看。
[size=2][color=#0001ff][url=http://blog.chinaunix.net/u/29321/showart_343791.html][size=10pt]周立发 linux 视频教程下载（不定期持续更新）[/size][/url][/color][/size][color=#ff0102][font=monospace]
[/font][/color][color=#ff0102]如以上内容有误或有不足之处，望朋友能给予意见或者建议！谢谢：）web log: xuanfei.cublog.cn

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[[i] 本帖最后由 悬非 于 2007-7-22 11:15 编辑 [/i]]

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