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