먼저 gdb <실행화일> -c <core 화일> 하여 디버거를 실행시킨후
아래와 같이 bt(backtrace)명령어로 어떤 함수를 부르다 죽었는지
확인합니다.


(gdb) bt
#0 0xef663628 in fprintf () from /usr/lib/libc.so.1
#1 0x15b0c in fxRslt (gubun=0x56bf0 "1", from=0x57070 "010305",
to=0x574f0 "010305", loginid=0x57970 "TEST001")
at /fxMain/SRC/fxWeb/cgi/rslt.c:50
#2 0x1597c in main (argc=1, argv=0xeffff964)
at /fxMain/SRC/fxWeb/cgi/fxrslt.c:85
(gdb)


보니까 main->fxRslt->fprintf 하다가 죽었군요. 장소는 rslt.c 에 50번째 줄.
이제 frame 명령어로 해당 스택으로 이동합니다. 이후 list 명령어로
소스파일을 확인해봅니다.


(gdb) frame 1
#1 0x15b0c in fxRslt (gubun=0x56bf0 "1", from=0x57070 "010305",
to=0x574f0 "010305", loginid=0x57970 "TEST001")
at /fxMain/SRC/fxWeb/cgi/rslt.c:50
50 fprintf(logfile,"GUBUN:[%c] FROM:[%s] TO:[%s] LOGIN:[%s]\n",
(gdb) list
45 loginid[i] = '\0';
46 strcpy(audit_id, loginid);
47
48
sprintf(logfname,"%s/%s.log",FXRSLT_LOGDIR,RSLT_LOGINIT,loginid);
49 logfile = fopen(logfname, "w");
50 fprintf(logfile,"GUBUN:[%c] FROM:[%s] TO:[%s] LOGIN:[%s]\n",
51 gubun[0],from,to,loginid);
52
53 if (ChkDate(from,to)==0) {
54 fprintf(logfile,"Error in ChkDate\n");
(gdb)


그담엔 print명령어등으로 각 변수값을 조사하여 NULL이 있는지 체크해보면
됩니다.


(gdb) print logfname
$1 = "/fxLog/fxRslt_TEST001.log\000?\001~~~~~~~~~~
(gdb)


도움이 되었기를 바라며....


[lms:/weblogic]#gdb /opt/java1.4/bin/IA64N/java core.s
HP gdb 5.2 for HP Itanium (32 or 64 bit) and target HP-UX 11.2x.
Copyright 1986 - 2001 Free Software Foundation, Inc.
Hewlett-Packard Wildebeest 5.2 (based on GDB) is covered by the
GNU General Public License. Type "show copying" to see the conditions to
change it and/or distribute copies. Type "show warranty" for warranty/support.
..
Core was generated by `java'.
Program terminated with signal 6, Aborted.
SI_UNKNOWN - signal of unknown origin
#0 0x60000000c0337090:0 in __ksleep+0x30 () from /usr/lib/hpux32/libc.so.1
(gdb)


Core was generated by `java'.
Program terminated with signal 6, Aborted.
SI_UNKNOWN - signal of unknown origin
#0 0x60000000c0337090:0 in __ksleep+0x30 () from /usr/lib/hpux32/libc.so.1
(gdb) bt
#0 0x60000000c0337090:0 in __ksleep+0x30 () from /usr/lib/hpux32/libc.so.1
#1 0x60000000c00fcf40:0 in __mxn_sleep+0xb20 ()
from /usr/lib/hpux32/libpthread.so.1
#2 0x60000000c009c140:0 in <unknown_procedure> + 0xc60 ()
from /usr/lib/hpux32/libpthread.so.1
#3 0x60000000c009cfb0:0 in pthread_cond_timedwait+0x1d0 ()
from /usr/lib/hpux32/libpthread.so.1
#4 0x60000000c73efcd0:0 in T_4f_6599_cl_os::Hpux::Event::down ()
at /CLO/Components/JAVA_HOTSPOT/Src/src/os/hp-ux/vm/os_hp-ux.hpp:332
#5 0x60000000c73e7c80:0 in ObjectMonitor::EnterI ()
at /CLO/Components/JAVA_HOTSPOT/Src/src/os/hp-ux/vm/objectMonitor_hp-ux.cpp:
369
#6 0x60000000c73e8600:0 in ObjectMonitor::enter2 ()
at /CLO/Components/JAVA_HOTSPOT/Src/src/os/hp-ux/vm/objectMonitor_hp-ux.cpp:
419
#7 0x60000000c73e9dc0:0 in ObjectMonitor::enter ()
at /CLO/Components/JAVA_HOTSPOT/Src/src/os/hp-ux/vm/objectMonitor_hp-ux.cpp:
581
#8 0x60000000c7599aa0:0 in ObjectSynchronizer::slow_enter ()
at /CLO/Components/JAVA_HOTSPOT/Src/src/share/vm/runtime/synchronizer.cpp:42
5
#9 0x60000000c70ef020:0 in InterpreterRuntime::monitorenter ()
at /CLO/Components/JAVA_HOTSPOT/Src/src/share/vm/runtime/handles_inline.hpp:
---Type <return> to continue, or q <return> to quit---
27
(gdb)
(gdb)