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- #!/bin/bash
- # Copyright (c) International Business Machines Corp., 2008
- # Author: Matt Helsley <matthltc@us.ibm.com>
- #
- # This library is free software; you can redistribute it and/or
- # modify it under the terms of the GNU Lesser General Public
- # License as published by the Free Software Foundation; either
- # version 2.1 of the License, or (at your option) any later version.
- #
- # This library is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- # Lesser General Public License for more details.
- #
- # You should have received a copy of the GNU Lesser General Public
- # License along with this library; if not, write to the Free Software
- # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- #
- #
- # This bash script tests freezer code by starting a long subshell process.
- # The subshell process sleeps and then freezes the control group it is a
- # part of. We then thaw the subshell process. We expect the unthawed subshell
- # process to need cleanup afterwards (allows us to test successfull thawing).
- #
- . "${CGROUPS_TESTROOT}/libcgroup_freezer"
- SETS_DEFAULTS="${TCID=freeze_self_thaw.sh} ${TST_COUNT=1} ${TST_TOTAL=1}"
- declare -r TCID
- declare -r TST_COUNT
- declare -r TST_TOTAL
- export TCID TST_COUNT TST_TOTAL
- # We replace the normal sample process with a process which sleeps, issues
- # the freeze command, and then sleeps some more. Little does it know that it
- # will be freezing the cgroup it's been assigned to.
- function sleep_freeze_self_sleep()
- {
- ( export sample_proc=$! ; \
- add_sample_proc_to_cgroup ; \
- tst_resm TINFO " $sample_proc freezing itself" ; \
- "${CG_FILE_WRITE}" "${FREEZE}" > freezer.state ; \
- tst_resm TINFO " $sample_proc thawed successfully" ; \
- exec sleep $sample_sleep ) &
- local rc=$?
- export sample_proc=$!
- return $rc
- }
- running_cgroup_test
- mount_freezer && {
- make_sample_cgroup && {
- assert_cgroup_freezer_state "THAWED" \
- "ERROR: cgroup freezer started in non-THAWED state" && {
- sleep_freeze_self_sleep && {
- while /bin/true ; do
- trap 'break' ERR
- tst_resm TINFO " Waiting for $sample_proc to freeze itself"
- # WAIT until FROZEN (see FREEZE self above)
- wait_until_frozen
- assert_sample_proc_is_frozen
- # THAW
- issue_thaw_cmd
- wait_until_thawed
- assert_sample_proc_exists
- assert_sample_proc_not_frozen
- result=$FINISHED
- break
- done
- trap '' ERR
- cleanup_cgroup_test
- tst_resm TINFO " Cleaning up $0"
- # We need to stop the sample process.
- kill_sample_proc ; }
- # no inverse op needed for assert
- }
- rm_sample_cgroup ; }
- umount_freezer ; }
- # Failsafe cleanup
- cleanup_freezer || /bin/true
- exit $result
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