utils/lttngtrace

   1 #!/bin/bash
   2
   3 # Wrapper to setup a live session on localhost and read it in text mode live
   4
   5 SESSION_NAME="lttngtop-live-simple-$RANDOM"
   6
   7 destroy()
   8 {
   9         lttng destroy $SESSION_NAME >/dev/null
  10         rm -rf $HOME/lttng-traces/$HOSTNAME/${SESSION_NAME}*
  11         exit 0
  12 }
  13
  14 if test "$1" = "-h" -o "$1" = "--help"; then
  15         echo "usage : $0 [OPTIONS] [program [program-options]]"
  16         echo "OPTIONS :"
  17         echo "  -f             Follow threads associated with selected PIDs"
  18         echo "  -p             Comma-separated list of PIDs to display (in addition to the eventual executed program)"
  19         echo "  -n             Comma-separated list of procnames to display (in addition to the eventual executed program)"
  20         echo "  -a             In textdump mode, display all events but write in bold the processes we are interested in (-f and -p)"
  21         echo "  -k             kprobes to insert (same format as lttng enable-event, can be repeated)"
  22         echo "  -o <filename>  In textdump, output the log in <filename>"
  23         exit 0
  24 fi
  25
  26 pgrep -u root lttng-sessiond >/dev/null
  27 if test $? != 0; then
  28         echo "Starting lttng-sessiond as root (trying sudo, start manually if \
  29 it fails)"
  30         sudo lttng-sessiond -d
  31         if test $? != 0; then
  32                 exit 1
  33         fi
  34 fi
  35
  36 pgrep lttng-relayd >/dev/null
  37 if test $? != 0; then
  38         echo "Starting lttng-relayd as your current user, start manually if \
  39 it fails"
  40         lttng-relayd -d
  41         if test $? != 0; then
  42                 exit 1
  43         fi
  44 fi
  45
  46 SUDO=""
  47 groups|grep tracing >/dev/null
  48 if test $? != 0; then
  49         echo "You are not a member of the tracing group, so you need root \
  50 access, the script will try with sudo"
  51         SUDO="sudo"
  52 fi
  53
  54 # check if lttng command if in the path
  55 # check if the user can execute the command (with sudo if not in tracing group)
  56 # check if lttng-modules is installed
  57 $SUDO lttng list -k | grep sched_switch >/dev/null
  58 if test $? != 0; then
  59         echo "Something went wrong executing \"$SUDO lttng list -k | grep sched_switch\", \
  60 try to fix the problem manually and then start the script again"
  61 fi
  62
  63 # if our random session name was already in use, add more randomness...
  64 $SUDO lttng list | grep $SESSION_NAME
  65 if test $? = 0; then
  66         SESSION_NAME="$SESSION_NAME-$RANDOM"
  67 fi
  68 $SUDO lttng list | grep $SESSION_NAME
  69 if test $? = 0; then
  70         echo "Cannot create a random session name, something must be wrong"
  71         exit 2
  72 fi
  73
  74 lttng create $SESSION_NAME --live 1000000 -U net://localhost >/dev/null
  75 [[ $? != 0 ]] && exit 2
  76
  77 trap "destroy" SIGINT SIGTERM
  78
  79 lttng enable-event -s $SESSION_NAME -u -a >/dev/null
  80 lttng add-context -s $SESSION_NAME -u -t vpid -t procname -t vtid >/dev/null
  81
  82 lttng enable-event -s $SESSION_NAME -k lttng_statedump_start,lttng_statedump_end,lttng_statedump_process_state,lttng_statedump_file_descriptor,lttng_statedump_vm_map,lttng_statedump_network_interface,lttng_statedump_interrupt,sched_process_free,sched_switch,sched_process_fork >/dev/null
  83 [[ $? != 0 ]] && exit 2
  84 lttng enable-event -s $SESSION_NAME -k --syscall -a >/dev/null
  85 [[ $? != 0 ]] && exit 2
  86 lttng add-context -s $SESSION_NAME -k -t pid -t procname -t tid -t ppid >/dev/null
  87 [[ $? != 0 ]] && exit 2
  88 # if you want to add Perf counters, do something like that :
  89 #lttng add-context -s $SESSION_NAME -k -t perf:cache-misses -t perf:major-faults -t perf:branch-load-misses >/dev/null
  90
  91 LTTNGTOPARGS=""
  92 PROG=""
  93
  94 while [ "$1" != "" ]; do
  95         if test "$1" = "-p"; then
  96                 shift
  97                 LTTNGTOPARGS="$LTTNGTOPARGS -p $1"
  98                 shift
  99         elif test "$1" = "-k"; then
 100                 shift
 101                 lttng enable-event -k -s $SESSION_NAME "probe-$1" --probe $1 >/dev/null
 102                 shift
 103         elif test "$1" = "-o"; then
 104                 shift
 105                 LTTNGTOPARGS="$LTTNGTOPARGS -o $1"
 106                 shift
 107         elif test "$1" = "-n"; then
 108                 shift
 109                 LTTNGTOPARGS="$LTTNGTOPARGS -n $1"
 110                 shift
 111         elif test "${1:0:1}" = "-"; then
 112                 LTTNGTOPARGS="$LTTNGTOPARGS $1"
 113                 shift
 114         else
 115                 PROG=$@
 116                 break
 117         fi
 118 done
 119
 120 if test ! -z "$PROG"; then
 121         PROG="-- $PROG"
 122 fi
 123
 124 lttng start $SESSION_NAME >/dev/null
 125 [[ $? != 0 ]] && exit 2
 126
 127 s=$(lttngtop -r net://localhost | grep $SESSION_NAME)
 128 if test $? != 0; then
 129         echo "Problem executing lttngtop -r net://localhost | grep $SESSION_NAME"
 130         exit 1
 131 fi
 132 lttngtop -t -r $(echo $s|cut -d' ' -f1) $LTTNGTOPARGS $PROG
 133
 134 destroy