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

   1 #!/bin/sh
   2 #
   3 # Ensure that strace can detach from stopped 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 $STRACE -d -enone / > /dev/null 2> "$LOG"
  17 if grep -x "[^:]*strace: PTRACE_SEIZE doesn't work" "$LOG" > /dev/null; then
  18         skip_ "PTRACE_SEIZE doesn't work"
  19 fi
  20
  21 check_prog sleep
  22
  23 trap - TERM
  24 sleep $TIMEOUT_DURATION &
  25 kill -TERM $!
  26 wait $!
  27 expected_rc=$?
  28
  29 set -e
  30
  31 > "$LOG"
  32 ../set_ptracer_any sleep $((2*$TIMEOUT_DURATION)) > "$LOG" &
  33
  34 while ! [ -s "$LOG" ]; do
  35         kill -0 $! 2> /dev/null ||
  36                 fail_ 'set_ptracer_any sleep failed'
  37         $SLEEP_A_BIT
  38 done
  39
  40 tracee_pid=$!
  41 kill -STOP $tracee_pid
  42
  43 cleanup()
  44 {
  45         set +e
  46         kill $tracee_pid
  47         kill -CONT $tracee_pid
  48         wait $tracee_pid 2> /dev/null
  49         return 0
  50 }
  51
  52 > "$LOG"
  53 $STRACE -p $tracee_pid 2> "$LOG" &
  54
  55 while ! grep -F "Process $tracee_pid attached" "$LOG" > /dev/null; do
  56         kill -0 $! 2> /dev/null || {
  57                 cleanup
  58                 dump_log_and_fail_with "$STRACE -p failed to attach"
  59         }
  60         $SLEEP_A_BIT
  61 done
  62
  63 while ! grep -F -e '--- stopped by ' "$LOG" > /dev/null; do
  64         kill -0 $! 2> /dev/null || {
  65                 cleanup
  66                 dump_log_and_fail_with "$STRACE -p missed stop notifications"
  67         }
  68         $SLEEP_A_BIT
  69 done
  70
  71 kill -TERM $!
  72 wait $! && rc=0 || rc=$?
  73
  74 grep -F "Process $tracee_pid detached" "$LOG" > /dev/null || {
  75         cleanup
  76         dump_log_and_fail_with "$STRACE -p failed to detach"
  77 }
  78
  79 [ "$rc" = "$expected_rc" ] || {
  80         cleanup
  81         dump_log_and_fail_with "$STRACE -p failed to terminate itself"
  82 }
  83
  84 if [ -f /proc/self/status ]; then
  85         $SLEEP_A_BIT
  86         test -d /proc/$tracee_pid || {
  87                 cleanup
  88                 dump_log_and_fail_with 'tracee died after detach'
  89         }
  90         grep_pid_status "$tracee_pid" '^State:.*T (stopped)' > /dev/null || {
  91                 grep_pid_status "$tracee_pid" '^State:'
  92                 cleanup
  93                 dump_log_and_fail_with 'tracee is not group-stopped after detach'
  94         }
  95 fi
  96
  97 cleanup
  98 exit 0