1 #!/bin/sh 2 3 # Ensure that strace can detach from stopped processes. 4 5 . "${srcdir=.}/init.sh" 6 7 check_prog sleep 8 check_prog grep 9 10 set -e 11 12 rm -f $LOG 13 ./set_ptracer_any sleep $((2*$TIMEOUT_DURATION)) > $LOG & 14 15 while ! [ -s $LOG ]; do 16 kill -0 $! 2> /dev/null || 17 fail_ 'set_ptracer_any sleep failed' 18 $SLEEP_A_BIT 19 done 20 21 tracee_pid=$! 22 kill -STOP $tracee_pid 23 24 cleanup() 25 { 26 set +e 27 kill $tracee_pid 28 kill -CONT $tracee_pid 29 wait $tracee_pid 2> /dev/null 30 } 31 32 rm -f $LOG 33 $STRACE -p $tracee_pid 2> $LOG & 34 35 while ! grep -F "Process $tracee_pid attached" $LOG > /dev/null; do 36 kill -0 $! 2> /dev/null || 37 { cat $LOG; cleanup; fail_ 'strace -p does not work'; } 38 $SLEEP_A_BIT 39 done 40 41 while ! grep -F -e '--- stopped by ' $LOG > /dev/null; do 42 kill -0 $! 2> /dev/null || 43 { cat $LOG; cleanup; fail_ 'strace -p does not work'; } 44 $SLEEP_A_BIT 45 done 46 47 kill -INT $! 48 wait $! 49 50 grep -F "Process $tracee_pid detached" $LOG > /dev/null || 51 { cat $LOG; cleanup; fail_ 'strace -p failed to detach'; } 52 53 if [ -f /proc/self/status ]; then 54 $SLEEP_A_BIT 55 test -d /proc/$tracee_pid || 56 { cat $LOG; cleanup; fail_ 'tracee died after detach'; } 57 grep '^State:.*T (stopped)' < /proc/$tracee_pid/status > /dev/null || { 58 cat $LOG 59 grep '^State:' < /proc/$tracee_pid/status 60 cleanup 61 fail_ 'tracee is not group-stopped after detach' 62 } 63 fi 64 65 cleanup 66 exit 0 67
