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     echo "The following LTTng processes were detected running on the system and will be aborted:"
  29     echo "$lttng_processes"
  30
  31     # Stop the processes to make sure everything is frozen
  32     kill -SIGSTOP $pids
  33
  34     # Get dependencies for coredump analysis
  35     # Use /proc/$PID/exe and ldd to get all shared libs necessary
  36     array=(${pids})
  37     # Add the /proc/ prefix using parameter expansion
  38     array=("${array[@]/#/\/proc\/}")
  39     # Add the /exe suffix using parameter expansion
  40     array=("${array[@]/%/\/exe}")
  41     dependencies=$(ldd "${array[@]}" | grep -v "not found")
  42     dependencies=$(awk '/=>/{print$(NF-1)}' <<< "$dependencies" | sort | uniq)
  43
  44     kill -SIGABRT $pids
  45     kill -SIGCONT $pids
  46     ret=1
  47 fi
  48
  49 core_files=$(find "/tmp" -name "core\.[0-9]*" -type f 2>/dev/null) || true
  50 if [ ! -z "$core_files" ]; then
  51     echo "$core_files" >> "$file_list"
  52     echo "$dependencies" >> "$file_list"
  53
  54     # Make sure the coredump is finished using fuser
  55     for core in $core_files; do
  56         while fuser "$core"; do
  57             sleep 1
  58         done
  59     done
  60
  61     tar cfzh "${WORKSPACE}/build/core.tar.gz" -T "$file_list"
  62     rm -rf $core_files
  63     ret=1
  64 fi
  65
  66 rm -rf "$file_list"
  67 exit $ret