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| Thread process debugging방법 | |||||
| 분류 | OS/UNIX 명령어 | 등록일 | 2013-07-09 | 조회수 | 7404 |
| hwon 2004-02-17 189 Thread process debugging방법 ++++++++++++++++++++++++++++ 개요 ++++ Unix process Debugging방법들이 Utility마다 틀리고 Unix별로도 조금씩 차이가 나기 때문 에 command가 혼동되는 경우가 많습니다. 이 Tech Note에서는 간단한 Command위주로 각 Thread Stack을 보는 방법을 제공합니다. /usr/proc/bin/pstack 이용 ++++++++++++++++++++++++++ SUN과 기타 몇개의 Unix, Linux에서 제공하는 Utility로서 Running중인 Process의 Call Stack을 Thread별로 볼수 있는 아주 유용한 Command입니다. DB Hang일때 돌리면 돌리 면 됩 니다. ex> /usr/proc/bin/pstack 11068 ; 11068이 process pid dbx를 이용 +++++++++++ 1. Running중인 Process에 Attach해서 Thread별 Stack확인. $dbx $ALTIBASE_HOME/bin/altibase dbx>threads ; 모든 thread들의 정보를 확인. dbx>thread t@1 ; 1번 thread로 switch dbx>where ; 1번 thread의 stack 츨력 2. Core file에서 Thread별 Stack확인. $dbx $ALTIBASE_HOME/bin/altibase core dbx>threads ; 모든 thread들의 정보를 확인. dbx>thread t@1 ; 1번 thread로 switch dbx>where ; 1번 thread의 stack 출력 3. Zombie Thread까지 모두 출력 : dbx> threads -all gdb를 이용 ++++++++++ $gdb $ALTIBASE_HOME/bin/altibase gdb> info threads 42 Thread 31 (LWP 4) 0x329614 in _poll () 41 Thread 30 0x300cf8 in _lwp_sema_wait () 40 Thread 29 0x300cf8 in _lwp_sema_wait () 39 Thread 28 (LWP 29) 0x329614 in _poll () 38 Thread 27 (LWP 28) 0x329614 in _poll () 37 Thread 26 (LWP 27) 0x329614 in _poll () 36 Thread 25 (LWP 26) 0x329614 in _poll () 5 LWP 28 0x329614 in _poll () 4 LWP 29 0x329614 in _poll () 3 LWP 30 0x300cf8 in _lwp_sema_wait () * 2 Thread 1 (LWP 1) 0x329614 in _poll () 1 LWP 1 0x329614 in _poll () gdb> thread apply all bt ; 모든 thread의 stack trace를 출력 Thread 2 (Thread 1 (LWP 1)): #0 0x329614 in _poll () #1 0x2f2548 in select_large_fdset () #2 0x286908 in __1cKidcManagerGselect6FpnGfd_set_pnOPDL_Time_Value__i_ () #3 0x978d8 in __1cMmmtThreadMgrIDispatch6M_nGIDE_RC__ () #4 0x945f4 in __1cGmmiMgrIMainLoop6F_nGIDE_RC__ () #5 0x929e0 in main () Thread 1 (LWP 1 ): #0 0x329614 in _poll () #1 0x2f2548 in select_large_fdset () #2 0x286908 in __1cKidcManagerGselect6FpnGfd_set_pnOPDL_Time_Value__i_ () #3 0x978d8 in __1cMmmtThreadMgrIDispatch6M_nGIDE_RC__ () ---Type #4 0x945f4 in __1cGmmiMgrIMainLoop6F_nGIDE_RC__ () #5 0x929e0 in main () #0 0x329614 in _poll () gdb> t 1 ; 1번 thread로 switch gdb> bt ; stack출력 gdb> quit AIX 에서 dbx사용하는 방법. +++++++++++++++++++++++++++++ $dbx -a thread state-k wchan state-u k-tid mode held scope function $t1 wait running 24781 k no sys select (fd_set*,PDL_Time_Value*) >$t2 run blocked 21941 k no sys $t3 wait 0x00000000ea002ca0 blocked 23029 k no sys _event_wait $t4 wait running 23747 k no sys run () $t5 wait running 9059 k no sys run () $t6 wait running 24285 k no sys run () $t7 wait running 24001 k no sys run () $t8 wait running 25285 k no sys run () $t9 wait running 25543 k no sys run () $t10 wait 0x00000000ea003220 blocked 25801 k no sys _event_wait $t17 wait running 27607 k no sys run () $t18 wait running 27865 k no sys run () $t19 wait running 28123 k no sys run () $t20 wait running 28381 k no sys run () $t21 wait running 28639 k no sys run () $t22 wait running 28897 k no sys run () $t23 wait 0x00000000ea0038a0 blocked 29155 k no sys _event_wait $t24 zomb terminated 29413 k no sys _pthread_body |
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