granicus.if.org Git - strace/blob - tests/detach-running.test

   1 #!/bin/sh
   2 #
   3 # Ensure that strace can detach from running processes.
   4 #
   5 # Copyright (c) 2013-2015 Dmitry V. Levin <ldv@altlinux.org>
   6 # Copyright (c) 2014-2018 The strace developers.
   7 # All rights reserved.
   8 #
   9 # SPDX-License-Identifier: GPL-2.0-or-later
  10
  11 . "${srcdir=.}/init.sh"
  12
  13 run_prog_skip_if_failed \
  14         kill -0 $$
  15
  16 check_prog sleep
  17
  18 trap - TERM
  19 sleep $TIMEOUT_DURATION &
  20 kill -TERM $!
  21 wait $!
  22 expected_rc=$?
  23
  24 set -e
  25
  26 ../set_ptracer_any sh -c "echo > $LOG; while :; do :; done" > /dev/null &
  27
  28 while ! [ -s "$LOG" ]; do
  29         kill -0 $! 2> /dev/null ||
  30                 fail_ 'set_ptracer_any sh failed'
  31         $SLEEP_A_BIT
  32 done
  33
  34 tracee_pid=$!
  35
  36 cleanup()
  37 {
  38         set +e
  39         kill $tracee_pid
  40         wait $tracee_pid 2> /dev/null
  41         return 0
  42 }
  43
  44 $STRACE -p $tracee_pid 2> "$LOG" &
  45
  46 while ! grep -F "Process $tracee_pid attached" "$LOG" > /dev/null; do
  47         kill -0 $! 2> /dev/null || {
  48                 cleanup
  49                 dump_log_and_fail_with "$STRACE -p failed to attach"
  50         }
  51         $SLEEP_A_BIT
  52 done
  53
  54 kill -TERM $!
  55 wait $! && rc=0 || rc=$?
  56
  57 grep -F "Process $tracee_pid detached" "$LOG" > /dev/null || {
  58         cleanup
  59         dump_log_and_fail_with "$STRACE -p failed to detach"
  60 }
  61
  62 [ "$rc" = "$expected_rc" ] || {
  63         cleanup
  64         dump_log_and_fail_with "$STRACE -p failed to terminate itself"
  65 }
  66
  67 if [ -f /proc/self/status ]; then
  68         $SLEEP_A_BIT
  69         test -d /proc/$tracee_pid || {
  70                 cleanup
  71                 dump_log_and_fail_with 'tracee died after detach'
  72         }
  73         grep_pid_status "$tracee_pid" '^State:.*R (running)' > /dev/null || {
  74                 grep_pid_status "$tracee_pid" '^State:'
  75                 cleanup
  76                 dump_log_and_fail_with 'tracee is not running after detach'
  77         }
  78 fi
  79
  80 cleanup
  81 exit 0