GDB调试

时间：2006-03-19 来源：shangguanyun

程序如下：
#include <stdio.h>
int main()
{
      int i;
      long result = 0;
      for(i=1; i<=5; i++)
      {
            result += i;
      }
      printf("result = %d \n", result );
      getchar();
      return 0;
}
选用-g选项添加调试信息
gcc -g gdbtest.c -o gdbtest

[root@localhost sgy]# gdb
GNU gdb Red Hat Linux (5.3post-0.20021129.18rh)
Copyright 2003 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".
(gdb) file gdbtest    //加载文件或开始用gdb gdbtest加载
Reading symbols from gdbtest...done.
(gdb) l       //列出源代码
1       int main()
2       {
3            int i;
4            long result = 0;
5            for(i=1; i<=5; i++)
6            {
7                  result += i;
8            }
9            printf("result = %d \n", result );
10            getchar();
11            return 0;
12       }
(gdb) break 4        //将断点加在4行
Breakpoint 1 at 0x804839e: file gdbtest.c, line 4.
(gdb) r        //开始执行
Starting program: /usr/sgy/gdbtest

Breakpoint 1, main () at gdbtest.c:4
14            long result = 0;
(gdb) watch result   //观察变量result
Hardware watchpoint 2: result
(gdb) n             //n表示单步执行
15            for(i=1; i<=5; i++)
(gdb) n
Hardware watchpoint 2: result

Old value = 1108544020
New value = 0
0x080483ac in main () at gdbtest.c:5
15            for(i=1; i<=5; i++)

(gdb) kill        //杀掉正在调试项目
Kill the program being debugged? (y or n) y
(gdb) q         //退出
[root@localhost sgy]#

相关阅读更多 +