????pstack??????????????????????? pstack ???????????????????????root??????С????????pstack?????????????λ?á???????????????????????pid?????????pstack?????????man????????????
[root@DB-Server ~]# man pstack
PSTACK(1)                  Linux Programmer’s Manual                 PSTACK(1)
NAME
pstack - print a stack trace of a running process
SYNOPSIS
pstack pid
DESCRIPTION
pstack  attaches  to  the active process named by the pid on the command line?? and prints out an execution stack trace.  If ELF symbols exist in the binary (usually the case
unless you have run strip(1))?? then symbolic addresses are printed as well.
If the process is part of a thread group?? then pstack will print out a stack trace for each of the threads in the group.
SEE ALSO
nm(1)?? ptrace(2)?? gdb(1)
AUTHORS
Ross Thompson <ross@whatsis.com>
Red Hat?? Inc. <http://bugzilla.redhat.com/bugzilla>
Red Hat Linux                     Dec 17 2004                        PSTACK(1)
(END)
??????????????????pstack????????Oracle??????????????????????
????1?? ????????????????????
????[oracle@DB-Server~]$ ps -ef | grep lsn
????oracle 12027 11806 0 11:18 pts/1 00:00:00 grep lsn
????oracle 31440 1 0 Mar04 ? 00:01:41 /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr LISTENER -inherit
????2?? ???????????????????д?????lsn_pstack.log
????[oracle@DB-Server~]$ pstack 31440 >> lsn_pstack.log
????[oracle@DB-Server~]$ pstack 31440 >> lsn_pstack.log
????[oracle@DB-Server~]$ pstack 31440 >> lsn_pstack.log
????[oracle@DB-Server~]$
????3????????????????????????????ù?????main->nsglma->nsevwait->ntevque->ntevpque->poll.
[oracle@DB-Server~]$ more lsn_pstack.log
#0  0x0000003c7d0cb65f in poll () from /lib64/libc.so.6
#1  0x00007f82c63292e7 in ntevpque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1
#2  0x00007f82c6326aab in ntevque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1
#3  0x00007f82c62fc81e in nsevwait () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1
#4  0x00000000004108d9 in nsglma ()
#5  0x0000000000405abd in main ()
#0  0x0000003c7d0cb65f in poll () from /lib64/libc.so.6
#1  0x00007f82c63292e7 in ntevpque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1
#2  0x00007f82c6326aab in ntevque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1
#3  0x00007f82c62fc81e in nsevwait () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1
#4  0x00000000004108d9 in nsglma ()
#5  0x0000000000405abd in main ()
#0  0x0000003c7d0cb65f in poll () from /lib64/libc.so.6
#1  0x00007f82c63292e7 in ntevpque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1
#2  0x00007f82c6326aab in ntevque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1
#3  0x00007f82c62fc81e in nsevwait () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1
#4  0x00000000004108d9 in nsglma ()
#5  0x0000000000405abd in main ()
[oracle@DB-Server~]$