找不到Segmentation fault错误原因，请大家给点意见！

[meet_star]

-bash-2.05b$ gdb -c core.14181 mm_agent
GNU gdb Red Hat Linux (6.3.0.0-0.30.1rh)
Copyright 2004 Free Software Foundation, Inc.
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There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu"...Using host libthread_db library "/lib/tls/libthread_db.so.1".

Core was generated by `./mm_agent'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so.10.1...done.
Loaded symbols for /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so.10.1
Reading symbols from /lib/tls/libpthread.so.0...done.
Loaded symbols for /lib/tls/libpthread.so.0
Reading symbols from /usr/lib/libncurses.so.5...done.
Loaded symbols for /usr/lib/libncurses.so.5
Reading symbols from /lib/tls/libm.so.6...done.
Loaded symbols for /lib/tls/libm.so.6
Reading symbols from /lib/tls/libc.so.6...done.
Loaded symbols for /lib/tls/libc.so.6
Reading symbols from /usr/lib/libstdc++.so.5...done.
Loaded symbols for /usr/lib/libstdc++.so.5
Reading symbols from /lib/libgcc_s.so.1...done.
Loaded symbols for /lib/libgcc_s.so.1
Reading symbols from /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libnnz10.so...done.
Loaded symbols for /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libnnz10.so
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/libnsl.so.1...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/lib/libgpm.so.1...done.
Loaded symbols for /usr/lib/libgpm.so.1
Reading symbols from /lib/libnss_files.so.2...done.
Loaded symbols for /lib/libnss_files.so.2
Reading symbols from /lib/libnss_dns.so.2...done.
Loaded symbols for /lib/libnss_dns.so.2
Reading symbols from /lib/libresolv.so.2...done.
Loaded symbols for /lib/libresolv.so.2
#0 0x001c2009 in free () from /lib/tls/libc.so.6
(gdb) bt
#0 0x001c2009 in free () from /lib/tls/libc.so.6
#1 0x001bdc0b in _IO_free_backup_area_internal () from /lib/tls/libc.so.6
#2 0x001bc170 in _IO_new_file_overflow () from /lib/tls/libc.so.6
#3 0x001bcc00 in _IO_new_file_xsputn () from /lib/tls/libc.so.6
#4 0x00197397 in vfprintf () from /lib/tls/libc.so.6

#5 0x0019ddef in fprintf () from /lib/tls/libc.so.6

#6 0x08072faf in cLogfile::Log2file (this=0x99b1c60, pBuffer=0x37dcdf0 "[ DB ][<-][....-....] System Info: Get data form DB Msisdn[1234], SubType[3], Status[0]",
pBufferPrefix=0x37d92b0 "081207 012236.305 ", pBufferPostfix=0x0, BufferLen=0) at cLogfile.cc:367//此行是调用log库，它是常用库，应该没问题，再以上的提示就和代码没什么关系
#7 0x08074768 in cLogCycle::Log2file (this=0x99b1c60, pBuffer=0x37dcdf0 "[ DB ][<-][....-....] System Info: Get data form DB Msisdn[1234], SubType[3], Status[0]",
pPrefixBuffer=0x37d92b0 "081207 012236.305 ", pPostfixBuffer=0x0, Len=0) at cLogCycle.cc:567 //此行是调用log库，它是常用库，应该没问题

#8 0x0806aebe in cLogDateCycle::Log2file (this=0x99b1c60, Buffer=0x37dcdf0 "[ DB ][<-][....-....] System Info: Get data form DB Msisdn[1234], SubType[3], Status[0]", Len=0) //此行是将Buffer的内容写入log文件
at cLogDateCycle.cc:821

#9 0x08053de6 in WriteLog::OutputLog (this=0x99b10b8, pModuleName=0x808c1b4 " DB ", pRefId=0x808c1af "....", pTokenId=0x808c1af "....", pDirection=2,
szFormat=0x808c468 "System Info: Get data form DB MSISDN[%s], SubType[%d], Status[%d]") at WriteLog.cpp:66 //此行是将这几个参数组合成Buffer字符，从Core里面看，这几个参数都是正确的，都有值，内存地址也正确


#10 0x0804bba7 in DBHandle::GetAPartyStatus (this=0x99b3088, szANum=0x37e24dc "1234", iSubType=0x37e23a4, iStatus=0x37e23a0) at DBHandle.cpp:162

//szANum=0x37e24dc "1234", iSubType=0x37e23a4, iStatus=0x37e23a0 这三个参数都有值

#11 0x0804cf63 in check_queue_thread (arg=0x0) at mm_agent.cpp:472
#12 0x004dcde8 in start_thread () from /lib/tls/libpthread.so.0

各位大侠给点意见，看看是什么问题，感觉从这core里面看不出什么问题？
#13 0x0022d93a in clone () from /lib/tls/libc.so.6

[qqwx_1986]

晕乎乎的顶一下.....

[meet_star]

自己顶下，，，，

[nullah]

汗.....
比一楼还晕

[meet_star]

up

[lala_benben]

应该是多线程的问题。。你看是正确的。。但是其他线程或许以及功能改变了这个值

[meet_star]

是有多线程，但这个函数只有一个线程去调用，所以有点郁闷。
这问题不是每次都有，现在程序跑了好几天都没有，测试数据都是一样。

[alexhilton]

能问一下楼主吗， “你在做什么啊？”怎么那么多， 一大堆没看明白！

[meet_star]

这些内容是core文件里的，程序死了就产生了这个core文件，帮解决问题的

[erwin1984]

把 cLogfile::Log2file 的代码贴出来看看?

[就呆在云上]

pBufferPostfix=0x0, BufferLen=0)

你写了没有分配空间的地址，能不core掉？
segment fault一般就是因为出现了写内存出错的缘故
你看看哪里是不是没有分配空间啊

[meet_star]

[Quote=引用 10 楼 ztz0223 的回复:]
C/C++ codepBufferPostfix=0x0, BufferLen=0)



你写了没有分配空间的地址，能不core掉？
segment fault一般就是因为出现了写内存出错的缘故
你看看哪里是不是没有分配空间啊
[/Quote]

是啊，可能是这个问题。
可这些都是库里的东西，外面也没用到此参数。

[romandion]

0x08072faf in cLogfile::Log2file (this=0x99b1c60, pBuffer=0x37dcdf0 "[ DB ][ <-][....-....] System Info: Get data form DB Msisdn[1234], SubType[3], Status[0]",
pBufferPrefix=0x37d92b0 "081207 012236.305 ", pBufferPostfix=0x0, BufferLen=0) at cLogfile.cc:367//此行是调用log库，它是常用库，应该没问题，再以上的提示就和代码没什么关系

楼主最好把Log2file的贴出来看下吧。

如果CLOGFILE是常用库的话，我感觉倒不一定是pBufferPostfix=0x0, BufferLen=0的问题。因为这两个参数应该是默认参数，如下

#8 0x0806aebe in cLogDateCycle::Log2file (this=0x99b1c60, Buffer=0x37dcdf0 "[ DB ][ <-][....-....] System Info: Get data form DB Msisdn[1234], SubType[3], Status[0]", Len=0) //此行是将Buffer的内容写入log文件at cLogDateCycle.cc:821

那么极有可能是是日志文件大小超过2G了，或者磁盘空间不足。检查下看看。

[meet_star]

[Quote=引用 12 楼 romandion 的回复:]
0x08072faf in cLogfile::Log2file (this=0x99b1c60, pBuffer=0x37dcdf0 "[ DB ][ <-][....-....] System Info: Get data form DB Msisdn[1234], SubType[3], Status[0]",
pBufferPrefix=0x37d92b0 "081207 012236.305 ", pBufferPostfix=0x0, BufferLen=0) at cLogfile.cc:367//此行是调用log库，它是常用库，应该没问题，再以上的提示就和代码没什么关系

楼主最好把Log2file的贴出来看下吧。

如果CLOGFILE是常…
[/Quote]

日志文件没超过2G，它是可配置大小，配置的是10M，还有磁盘也有空间，现在还不知是什么原因，先结了再说。