linux gdb调试程序总结(break,continue,step finnish,run,watch,bt frame)

青旅半醒 2024-04-19 14:14 94阅读 0赞

建立2\_gdb.c

1 #include<stdio.h>
      2 
      3 int fun(int n)
      4 {
      5     int sum = 0;
      6     int i = 0;
      7     for(i=0;i<n;i++)
      8     {
      9         sum =sum + n;
     10     }
     11     return sum;
     12 }
     13 
     14 int main()
     15 {
     16     int j,result=0;
     17     for(j=0;j<20;j++)
     18     {                                                                                                           
     19         result = result + j;
     20     } 
     21     int sum1=fun(10);
     22     printf("sum1=%d\n",sum1);
     23     printf("result=%d\n",result);
     24     return 0;
     25 }

1，gdb的帮助文档和table键的使用：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 1][]

2.查看代码list(l)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 2][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 3][]

3,程序的gdb运行和挂载gdb：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 4][]

条件断点的使用：  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 5][]

4，断点的clear,delete,enable和disable的使用：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 7][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 8][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 9][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 10][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 11][]

6,watch,rwatch,awatch的使用：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 12][]

建立gdb.cpp

#include<iostream>
    
     #define BOOL int
     #define FLASE 0
     #define TRUE 1
     
     using namespace std;
     
     int main()
     {
        int i;
        BOOL flag;
        for(i=0;i<10;i++)
        {
            if(flag=(i%2) == FLASE)
            {
                cout << "double" << endl;
            }
            else
            {                                                                                                        
                cout << "single" << endl;
            }
        }
        return 0;
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 13][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 14][]

7， 输出重定向和set argv的使用：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 15][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 16][]

![20190918220912849.PNG][]

8，step(s),finish的使用，s进入函数，finish结束函数

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 17][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 18][]

9 bt frame的使用：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 19][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 20][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 21][]

10，程序变量的打印，全局变量和局部变量：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 22][]

#include<stdio.h>                                                                                                                    
      2 
      3 int g_num = 99;
      4 int fun_num(int fun_num)
      5 {
      6     return fun_num;
      7 }
      8 
      9 static int st_num = 100;
     10 
     11 int main()
     12 {
     13     int s_num = 22;
     14     int d_num = fun_num(88);
     15 
     16 
     17 }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMDA4MzI1_size_16_color_FFFFFF_t_70 23][]

打印格式总结：

![20201216170713630.PNG][]

gdb 打印泛型指针变量：

int sdk_get_cpld(u_int uiLogicPort, u_int ulCmd, void *pVal)
    ｛
        int iRet = read_cpld_reg(uiCpldAddr,(unsigned short *)pVal, 1);
        return iRet;
    ｝

> (gdb) p  \*(unsigned short \*)pVal   
> $5 = 9984

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[20190918220912849.PNG]: https://img-blog.csdnimg.cn/20190918220912849.PNG
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[20201216170713630.PNG]: https://img-blog.csdnimg.cn/20201216170713630.PNG