gdb的file命令加载程序

一 file命令加载程序

1 格式

file [可执行文件]

2 实战

2.1 新建test.cpp文件

#include <stdio.h>
int main()
{
    bool b=false;  //如果文件命名为test.c就会报错，因为C语言没有bool类型
    printf("hello, boy \n" );  
    return 0;
}

2.2 编译并运行该程序

[root@localhost temp]# g++ -g test.cpp -o test
[root@localhost temp]# ./test
hello, boy

2.3 启动gdb，然后加载可执行程序test

[root@localhost temp]# gdb
GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-100.el7_4.1
Copyright (C) 2013 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 "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
(gdb) file test
Reading symbols from /root/C++/ch02/2.8/test/temp/test...done.

提示说明gdb成功读取了可执行文件test中的调试信息，已经准备好接受用户具体的调试命令了。

二 list命令显示源代码

1 编译源代码

#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{     
    cout << "1 line!\n";
    cout << "2 line!\n";
    cout << "3 line!\n";
    cout << "4 line!\n";
    cout << "5 line!\n";
    cout << "6 line!\n";
    cout << "7 line!\n";
    cout << "8 line!\n";
    cout << "9 line!\n";
    cout << "10 line!\n";
    return 0;
}

2 编译

[root@localhost test]# g++ test1.cpp -g -o test1

3 输入list命令或直接输入l来显示源代码

[root@localhost test]# gdb
GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-100.el7_4.1
Copyright (C) 2013 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 "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
(gdb) file test1
Reading symbols from /root/C++/ch02/2.5/test/test1...done.
(gdb) l
1    #include <iostream>
2    using namespace std;
3    int main(int argc, char *argv[])
4    {     
5        cout << "1 line!\n";
6        cout << "2 line!\n";
7        cout << "3 line!\n";
8        cout << "4 line!\n";
9        cout << "5 line!\n";
10        cout << "6 line!\n";
(gdb) q

4 显示指定行前后的源代码内容

(gdb) file test1
Reading symbols from /root/C++/ch02/2.5/test/test1...done.
(gdb) list 6
1    #include <iostream>
2    using namespace std;
3    int main(int argc, char *argv[])
4    {     
5        cout << "1 line!\n";
6        cout << "2 line!\n";
7        cout << "3 line!\n";
8        cout << "4 line!\n";
9        cout << "5 line!\n";
10        cout << "6 line!\n";

5 list显示始末行之间的源代码内容

(gdb) list 1,15
1    #include <iostream>
2    using namespace std;
3    int main(int argc, char *argv[])
4    {     
5        cout << "1 line!\n";
6        cout << "2 line!\n";
7        cout << "3 line!\n";
8        cout << "4 line!\n";
9        cout << "5 line!\n";
10        cout << "6 line!\n";
11        cout << "7 line!\n";
12        cout << "8 line!\n";
13        cout << "9 line!\n";
14        cout << "10 line!\n";
15        return 0;

6 list显示函数附件的源代码内容

(gdb) list main
1    #include <iostream>
2    using namespace std;
3    int main(int argc, char *argv[])
4    {     
5        cout << "1 line!\n";
6        cout << "2 line!\n";
7        cout << "3 line!\n";
8        cout << "4 line!\n";
9        cout << "5 line!\n";
10        cout << "6 line!\n";

gdb的file命令加载程序

猜你喜欢