gdb调试无法定位段错误 求救
写了一段程序，总是出现段错误，于是gdb调试，结果无法找到段错误的位置。
gdb调试结果如下
[root@localhost udp_server4.9.3]# gcc -g -rdynamic -o server udp_server4.9.3.c
[root@localhost udp_server4.9.3]# gdb ./server
GNU gdb Red Hat Linux (6.5-15.fc6rh)
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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.
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This GDB was configured as "i386-redhat-linux-gnu"...Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) r
Starting program: /home/zyy/udp_socket/udp_server4.9.3/server
Program received signal SIGSEGV, Segmentation fault.
0x39313030 in ?? ()
(gdb) bt
#0 0x39313030 in ?? ()
#1 0x3839392e in ?? ()
#2 0x302c562c in ?? ()
#3 0x2e303030 in ?? ()
#4 0x30303030 in ?? ()
#5 0x302c4e2c in ?? ()
#6 0x30303030 in ?? ()
#7 0x3030302e in ?? ()
#8 0x2c452c30 in ?? ()
#9 0x30332c2c in ?? ()
#10 0x32323130 in ?? ()
#11 0x312a2c2c in ?? ()
#12 0x240a0d36 in ?? ()
#13 0x54565047 in ?? ()
#14 0x542c2c47 in ?? ()
#15 0x2c4d2c2c in ?? ()
#16 0x2c2c4e2c in ?? ()
#17 0x45342a4b in ?? ()
#18 0x47240a0d in ?? ()
#19 0x41474750 in ?? ()
#20 0x3030302c in ?? ()
#21 0x2e303230 in ?? ()
#22 0x2c383939 in ?? ()
---Type <return> to continue, or q <return> to quit---
关键位置全是问号，情何以堪？这可怎么看啊
代码有点长，先不帖了。
各位大侠指点。
[解决办法]
你可以先设置断点，break main，然后单步调试step，这样能够知道哪一行出错。
[解决办法]
这个段错误一般不好调试哦，建议你先run一下，看看段错误大概停在什么地方，然后再看看逻辑是不是出错了，或者内存出现了问题呢等。
[解决办法]
gcc -g3 -fno-omit-frame-pointer -rdynamic -o server udp_server4.9.3.c
再调试下看看
不行再把-g3换成-ggdb3
要不然就随便设置断点，run，直到第一个断点时段错误为止
[解决办法]
