gdb调试学习

4、动态的改变你程序的执行环境。

调试的程序如下；

[root@localhost ~]# cat tst.c 
#include <stdio.h>

int func(int n)
{
        int sum = 0, i;
        for(i = 0; i < n; i++)
        {
                sum += i;
        }
        return sum;
}

main()
{
        int i;
        long result = 0;
        for(i = 0; i<= 100; i++)
        {
                result +=i;
        }

        printf("result[1-100] = %d n", result);
        printf("result[1-250] = %d n", func(250));
}

 gcc -g tst.c -o tst  其中的-g参数用于保存调试的信息。

进入gdb调试界面：

[root@localhost ~]# gdb tst
GNU gdb (GDB) CentOS (7.0.1-45.el5.centos)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /root/tst...done.
(gdb) 

输入l命令来显示源码：

(gdb) l
7               {
8                       sum += i;
9               }
10              return sum;
11      }
12
13      main()
14      {
15              int i;
16              long result = 0;
(gdb) 

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gdb调试学习

原文：http://blog.csdn.net/huang2009303513/article/details/21025847