#!/bin/bash
# vim: dict=/usr/share/beakerlib/dictionary.vim cpt=.,w,b,u,t,i,k
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#
#   runtest.sh of /tools/systemtap/Regression/stapio-possible-circular-locking-dependency
#   Description: Test for BZ#1020207 (stapio possible circular locking dependency)
#   Author: Martin Cermak <mcermak@redhat.com>
#
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#
#   Copyright (c) 2014 Red Hat, Inc.
#
#   This copyrighted material is made available to anyone wishing
#   to use, modify, copy, or redistribute it subject to the terms
#   and conditions of the GNU General Public License version 2.
#
#   This program 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 General Public License for more details.
#
#   You should have received a copy of the GNU General Public
#   License along with this program; if not, write to the Free
#   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
#   Boston, MA 02110-1301, USA.
#
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# Include Beaker environment
. /usr/share/beakerlib/beakerlib.sh || exit 1

rlJournalStart
    rlPhaseStartSetup
        rlRun "TMPDIR=\$(mktemp -d)"
        rlRun "pushd $TMPDIR"
        cat > test5.stap <<EOF
global dummy
probe end { printf("dummy: %d\n", dummy); }
probe kernel.trace("__extent_writepage") { dummy = dummy + 1; }
EOF

        cat > reproduce.sh <<EOF
#!/bin/bash

i=0
while [ True ]; do
    i=\$((i+1))
    echo "Attempt \$i"
    echo 3 > /proc/sys/vm/drop_caches 
    stap test5.stap -c "sleep 2"
    if dmesg 2>&1 | grep "possible circular locking dependency detected"; then
        dmesg 
        exit 1
    fi
done
exit 0
EOF

        rlRun "chmod +x reproduce.sh"
    rlPhaseEnd

    rlPhaseStartTest
        TO=180 # timeout seconds
        # when timeout TO is hit, exitcode 124 is returned
        rlRun "timeout $TO ./reproduce.sh" 0,124
        # if issue doesn't get reproduced within TO, the test will pass
    rlPhaseEnd

    rlPhaseStartCleanup
        rlRun "popd"
        rlRun "rm -r $TMPDIR"
    rlPhaseEnd
rlJournalPrintText
rlJournalEnd