Linux调试工具GDB使用教程

[yqtao@localhost linux]$ cat buging.c

#include <stdio.h>

int getSum(int n) {

    int sum=0,i;

    for (i=1;i<=n;i++)

        sum+=i;

    return sum;

}

int main(){

    int res=getSum(100);

    printf("1+2+...+100=%d\n",res);

}

// 查看源码

// 查看第几行附近

// 可简写成l 2

(gdb) list 2  

1    #include <stdio.h>

2    int getSum(int n) {

3        int sum=0,i;

4        for (i=1;i<=n;i++)

5            sum+=i;

6        return sum;

7    }

// 查看main函数附近的源码

(gdb) list main

3        int sum=0,i;

4        for (i=1;i<=n;i++)

5            sum+=i;

6        return sum;

7    }

8    int main(){

9        int res=getSum(100);

10       printf("1+2+...+100=%d\n",res);

11   }

// 设置断点

// break +n在第几行设断点

(gdb) break 8

Breakpoint 1 at 0x4004fa: file buging.c, line 8.

// break +函数名 ，在函数名处设断点

(gdb) break getSum

Breakpoint 2 at 0x4004cb: file buging.c, line 3.

//查看断点信息

(gdb) info breakpoints

Num   Type      Disp Enb Address      What

1    breakpoint   keep y  0x00000000004004fa in main at buging.c:8

2    breakpoint   keep y  0x00000000004004cb in getSum at buging.c:3