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