scripts/lttng-tools/hang_processes.sh

   1 #!/bin/bash -exu
   2 #
   3 # Copyright (C) 2018 - Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
   4 #
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 PGREP=pgrep
  19 pids=""
  20 dependencies=""
  21 file_list=$(mktemp)
  22 ret=0
  23
  24 lttng_processes="$("$PGREP" -l 'lttng|gen-ust-.+')" || true
  25 if [ ! -z "$lttng_processes" ]; then
  26
  27     pids="$(cut -d ' ' -f 1 <<< "$lttng_processes" | tr '\n' ' ')"
  28     comma_pids=$(tr ' ' ',' <<< "$pids")
  29     echo "The following LTTng processes were detected running on the system and will be aborted:"
  30     echo "$lttng_processes"
  31
  32     # Stop the processes to make sure everything is frozen
  33     kill -SIGSTOP $pids
  34
  35     # Get dependencies for coredump analysis
  36     # Use /proc/$PID/exe and ldd to get all shared libs necessary
  37     array=(${pids})
  38     # Add the /proc/ prefix using parameter expansion
  39     array=("${array[@]/#/\/proc\/}")
  40     # Add the /exe suffix using parameter expansion
  41     array=("${array[@]/%/\/exe}")
  42     dependencies=$(ldd "${array[@]}" | grep -v "not found")
  43     dependencies=$(awk '/=>/{print$(NF-1)}' <<< "$dependencies" | sort | uniq)
  44
  45     kill -SIGABRT $pids
  46     kill -SIGCONT $pids
  47     ret=1
  48 fi
  49
  50 core_files=$(find "/tmp" -name "core\.[0-9]*" -type f 2>/dev/null) || true
  51 if [ ! -z "$core_files" ]; then
  52     echo "$core_files" >> "$file_list"
  53     echo "$dependencies" >> "$file_list"
  54
  55     # Make sure the coredump is finished using fuser
  56     for core in $core_files; do
  57         while fuser "$core"; do
  58             sleep 1
  59         done
  60     done
  61
  62     tar cfzh "${WORKSPACE}/build/core.tar.gz" -T "$file_list"
  63     rm -rf $core_files
  64     ret=1
  65 fi
  66
  67 rm -rf "$file_list"
  68 exit $ret