1 #!/bin/bash 2 3 # Copyright (c) International Business Machines Corp., 2008 4 # Author: Matt Helsley <matthltc (at] us.ibm.com> 5 # 6 # This library is free software; you can redistribute it and/or 7 # modify it under the terms of the GNU Lesser General Public 8 # License as published by the Free Software Foundation; either 9 # version 2.1 of the License, or (at your option) any later version. 10 # 11 # This library is distributed in the hope that it will be useful, 12 # but WITHOUT ANY WARRANTY; without even the implied warranty of 13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 # Lesser General Public License for more details. 15 # 16 # You should have received a copy of the GNU Lesser General Public 17 # License along with this library; if not, write to the Free Software 18 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 # 20 21 # 22 # This bash script tests freezer code by starting a long sleep process. 23 # The sleep process is frozen. We then kill the sleep process. 24 # Then we unfreeze the sleep process and see what happens. We expect the 25 # sleep process to receive the kill signals and exit almost immediately 26 # after the cgroup is thawed. 27 # 28 29 . "${CGROUPS_TESTROOT}/libcgroup_freezer" 30 SETS_DEFAULTS="${TCID=freeze_kill_thaw.sh} ${TST_COUNT=1} ${TST_TOTAL=1}" 31 declare -r TCID 32 declare -r TST_COUNT 33 declare -r TST_TOTAL 34 export TCID TST_COUNT TST_TOTAL 35 36 running_cgroup_test 37 mount_freezer && { 38 make_sample_cgroup && { 39 start_sample_proc && { 40 41 while /bin/true ; do 42 trap 'break' ERR 43 assert_cgroup_freezer_state "THAWED" \ 44 "ERROR: cgroup freezer started in non-THAWED state" 45 add_sample_proc_to_cgroup 46 47 # FREEZE 48 issue_freeze_cmd 49 wait_until_frozen 50 assert_sample_proc_is_frozen 51 52 # KILL 53 # NOTE: not "send_signal" because we're in the freezer tests 54 echo -n "INFO: Killing $sample_proc ..." 55 kill $sample_proc || kill -9 $sample_proc 56 echo " done." 57 58 # THAW 59 # We expect that kill will not complete until the sample process is 60 # thawed. We also expect the task to remain visible to 'ps'. 61 # TODO: reliably fix race between signal and assert ?? 62 assert_sample_proc_is_frozen 63 64 issue_thaw_cmd 65 wait_until_thawed 66 67 # We do NOT call 68 # assert_task_not_frozen $sample_proc 69 # here because we've killed the sample process. 70 assert_sample_proc_does_not_exist 71 sample_proc="" 72 result=$FINISHED 73 break 74 done 75 trap '' ERR 76 cleanup_cgroup_test 77 tst_resm TINFO " Cleaning up $0" 78 79 # We may need to stop the sample process because we could have failed before the 80 # rest of the test caused it to stop. 81 kill_sample_proc ; } 82 rm_sample_cgroup ; } 83 umount_freezer ; } 84 85 # Failsafe cleanup 86 cleanup_freezer || /bin/true 87 88 exit $result 89 90
