GDB的调试问题大侠来下阿

[q198816]

gdb下的一些功能有时候有有时候没有到底怎么回事呢？比如：
[Magic@localhost luanma]$ gdb w
GNU gdb Fedora (6.8-1.fc9)
Copyright (C) 2008 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"...
(no debugging symbols found)
(gdb) break main
Breakpoint 1 at 0x8048462
(gdb) run
Starting program: /home/luanma/w
(no debugging symbols found)／／／／／／／／／有时候有有时候没有的
(no debugging symbols found)
(no debugging symbols found)

Breakpoint 1, 0x08048462 in main ()
Missing separate debuginfos, use: debuginfo-install glibc.i686
(gdb) list
No symbol table is loaded. Use the "file" command.有时候可以用的有时候不能用就这样
(gdb) break w.c:5
No symbol table is loaded. Use the "file" command.
(gdb)

有时候确又是好的怎么办？

[快乐田伯光]

编译的时候要加-g选项

[x86]

如楼上所说，编译时加上-g选项才会有调试信息，list命令才会看到源码。no debugging symbols found也是这个原因。
带-g选项编译的二进制也可以复制到其他机器进行调试，但是需要在同样的目录结构下有源代码，否则list命令也会找不到源码。

[realdragon2]

[Quote=引用 2 楼 x86 的回复:]
如楼上所说，编译时加上-g选项才会有调试信息，list命令才会看到源码。no debugging symbols found也是这个原因。
带-g选项编译的二进制也可以复制到其他机器进行调试，但是需要在同样的目录结构下有源代码，否则list命令也会找不到源码。
[/Quote]

[jufeng2309]

还是一个初级问题，调试需要含有调试信息的可执行文件！

[huangwj122]

谢谢哦，我也遇到了同样的问题，哈哈