scripts/lttng-tools/postbuild_clean_processes_coredumps.sh

   1 #!/bin/bash
   2 #
   3 # SPDX-FileCopyrightText: 2018 Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
   4 #
   5 # SPDX-License-Identifier: GPL-2.0-or-later
   6
   7 set -exu
   8
   9 # Add the file passed as $1 to the list of files to collect.
  10 #
  11 # If that file is a symlink, follow it and collect the target, recursively.
  12 function collect_recursive
  13 {
  14     file_to_collect=$1
  15
  16     if [ -f "$file_to_collect" ]; then
  17         echo "$file_to_collect" >> "$file_list"
  18
  19         if [ -L "$file_to_collect" ]; then
  20             collect_recursive "$(readlink "$file_to_collect")"
  21         fi
  22     fi
  23 }
  24
  25 pids=()
  26 file_list=$(mktemp -t "postbuild_file_list.XXXXXX")
  27 ret=0
  28
  29 # WORKSPACE is normally set by Jenkins.  Use the current directory otherwise,
  30 # like when testing this script manually.
  31 WORKSPACE=${WORKSPACE:-$PWD}
  32
  33 lttng_processes="$(pgrep -l 'lttng|gen-ust-.+')" || true
  34 if [ -n "$lttng_processes" ]; then
  35
  36     echo "The following LTTng processes were detected running on the system and will be aborted:"
  37     echo "$lttng_processes"
  38
  39     # Build the pids array
  40     while read -r pid; do
  41         pids+=("$pid")
  42     done < <(cut -d ' ' -f 1 <<< "$lttng_processes")
  43
  44     # Abort the leftover processes to generate core files
  45     kill -SIGSTOP "${pids[@]}"
  46     kill -SIGABRT "${pids[@]}"
  47     kill -SIGCONT "${pids[@]}"
  48
  49     # Exit with failure when leftover processes are found
  50     ret=1
  51 fi
  52
  53 # For each core file...
  54 while read -r core_file; do
  55     sleep_count=0
  56
  57     # Make sure the coredump is finished using fuser
  58     while fuser "$core_file"; do
  59         sleep 1
  60         sleep_count+=1
  61
  62         # Skip the core file if it takes more than 30 seconds
  63         if [ "$sleep_count" -ge 30 ]; then
  64                 continue
  65         fi
  66     done
  67
  68     # Print a full backtrace of all threads
  69     if command -v gdb >/dev/null 2>&1; then
  70         gdb -nh -c "$core_file" -ex "thread apply all bt full" -ex q
  71     fi
  72
  73     # Collect everything in the core file that looks like a reference to a
  74     # shared lib
  75     strings "$core_file" | grep '^/.*\.so.*' | while read -r str; do
  76         collect_recursive "$str"
  77     done
  78
  79     echo "$core_file" >> "$file_list"
  80
  81     # Exit with failure when core files are found
  82     ret=1
  83 done < <(find "/tmp" -maxdepth 1 -name "core\.[0-9]*" -type f 2>/dev/null)
  84
  85 # If we recorded some files to collect, pack them up.
  86 if [ -s "$file_list" ]; then
  87     mkdir -p "${WORKSPACE}/build"
  88     tar cJfh "${WORKSPACE}/build/core.tar.xz" -T <(sort "$file_list" | uniq)
  89 fi
  90
  91 # Remove core files
  92 find "/tmp" -maxdepth 1 -name "core\.[0-9]*" -type f -delete || true
  93
  94 rm -f "$file_list"
  95
  96 exit $ret