contrib/scripts/ast_grab_core

   1 #!/bin/sh
   2 # $Id$
   3 # lame quickie script to snarf a core of a hung asterisk process.
   4 # bugs to ast_grab_core, blinky-lights.org  (derrick daugherty)
   5
   6 # we have found that gcore doesn't yield as useful a core file
   7 # as that yielded by a signal-caused core dump. So we are going to change
   8 # the strategy to sending a SEGV signal to the asterisk process,
   9 # and have it 'burn to the ground', leaving behind a core file.
  10 # the main difference is that you cannot control where the
  11 # core file will end up. We will assume that safe_asterisk was
  12 # used to start asterisk, and the core file should therefore end
  13 # up in /tmp (because safe_asterisk cd's there before starting asterisk).
  14 # if this is not the case, set DUMPDIR to the place where the core
  15 # file can be found.
  16
  17 DATE=`date +%Y%m%d%H%M`
  18 DUMPDIR=/tmp
  19 HOSTNAME=`hostname`
  20 ADMINEMAIL="root@localhost"
  21
  22 #the following should be improved
  23 if [ -e /etc/asterisk/asterisk.conf ]; then
  24         RUNDIR=`awk -F"=>" '/astrundir/ {print $2}' /etc/asterisk/asterisk.conf`
  25         PID=`cat ${RUNDIR}/asterisk.pid`
  26 elif [ -e /var/run/asterisk.pid ] ; then
  27         PID=`cat /var/run/asterisk.pid`
  28 else
  29         echo Could not find an asterisk.conf definition for astrundir,  using \'ps\'
  30         echo to try and determine process ID.  This is not reliable.
  31         PID=`ps auxwf|grep asterisk|grep vv|head -1|awk '{print $2}'`
  32 fi
  33
  34 echo Snarfing asterisk core, this could take a few seconds depending
  35 echo on how much memory is in use.
  36 echo
  37 echo \*\*\* WARNING \*\*\*  If the system is not already locked this will cause the
  38 echo \*\*\* WARNING \*\*\*  process to STOP while memory is dumped to disk.
  39 echo
  40
  41 /bin/kill -11 ${PID}
  42
  43 echo Snarfed!  ${DUMPDIR}/core.${PID}
  44 echo
  45
  46
  47 echo Trying for a backtrace of the captured core.
  48 /usr/bin/gdb /usr/sbin/asterisk ${DUMPDIR}/core.${PID} > ${DUMPDIR}/gdb_dump.${PID}.txt 2> /dev/null << EOF
  49 set prompt \n
  50 set print pretty\n
  51 echo --------------------------------------------------------------------------------\n
  52 echo INFO THREAD
  53 info thread
  54 echo --------------------------------------------------------------------------------\n
  55 echo THREAD APPLY ALL BT
  56 thread apply all bt
  57 echo --------------------------------------------------------------------------------\n
  58 echo THREAD APPLY ALL BT FULL
  59 thread apply all bt full
  60 quit
  61 EOF
  62 echo Done trying for a bt.
  63
  64
  65 echo Notifying admins of the core.
  66 /usr/bin/mail -s "${HOSTNAME} core dumped at ${DUMPDIR}/core.${PID}" ${ADMINEMAIL} < ${DUMPDIR}/gdb_dump.${PID}.txt
  67 echo Done.
  68 echo
  69 echo Reproducible deadlocks should be posted with a full backtrace and instructions
  70 echo to reproduce the issue at http://bugs.digium.com/    Thanks!