gdb新手上路，懂的请帮忙！

dengshiyou

list不论是用l,还是用list都出现：
No symbol table is loaded.  Use the "file" command.
其它的如r,break等都没问题。

自然平衡

编译时有没有加-g选项

dengshiyou

你是说编译.C文件时吗，我试试

co63

"No symbol table is loaded",这样还能用break？

Heefan

编译的时候没有加 符号表

二楼是对的，编译的时候加 －g

newroot

好像是文件没有加载吧！！
>file a.out

dengshiyou

还是没搞明白

nait

你是怎么运行gdb的？
把你输入的命令完整地帖出来

dengshiyou

[root@DYS tmp]# gdb
GNU gdb Red Hat Linux (6.3.0.0-1.21rh)
Copyright 2004 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 test
Reading symbols from /root/myc/tmp/test...(no debugging symbols found)...done.
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) r
Starting program: /root/myc/tmp/test
Reading symbols from shared object read from target memory...(no debugging symbols found)...done.
Loaded system supplied DSO at 0x4d9000
(no debugging symbols found)
(no debugging symbols found)
The string is hello there
The string printed backward is

Program exited with code 040.
(gdb) l
No symbol table is loaded.  Use the "file" command.
(gdb) list
No symbol table is loaded.  Use the "file" command.
(gdb)

nait

no debugging symbols found

你编译时有加-g吗？
看一下gcc 的manpage