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#!/bin/bash
#
# Copyright (C) 2020 Konsulko Group
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# gcovr wrapper for generating coverage reports against AGL bindings
# on target. With a given binding name or coverage widget file, the
# coverage version will be installed, and the pyagl tests for the
# binding run before generating a report with gcovr. The afm-test
# test widget or a user-supplied command may be run instead of the
# pyagl tests, see usage below, or run with "--help".
#
usage() {
cat <<-EOF
Usage:
$(basename $0) [options] <binding name | widget file>
Options:
-h, --help
Print this help and exit
-k, --keep
Do not remove temporary files/directories
-o, --gcovr-options
Additional gcovr options, multiple options should be quoted
-w, --workdir
gcov/gcovr temporary working directory, defaults to /tmp/gcov
The directory will be removed after running without --keep if it
is empty, use caution if specifying existing system directories!
--pyagl
Run pyagl tests for binding, enabled by default
--afm-test
Run afm-test test widget tests for binding.
If specified, disables pyagl tests; note that the last argument in
the command-line will take precedence.
-c, --command
Test command to use in place of pyagl or afm-test, should be quote
If specified, disables pyagl and afm-test tests.
EOF
}
# Helper to validate widget install dir
check_wgt_install() {
if [ ! \( -d $1 -o -f $1/config.xml \) ]; then
echo "ERROR: No widget install at $1"
exit 1
elif [ ! -d $1/src ]; then
echo "ERROR: No source in $1/src"
exit 1
fi
}
# Helper to run gcovr inside mount namespace environment
gcovr_runner() {
wgt_install_dir=/var/local/lib/afm/applications/$1
check_wgt_install ${wgt_install_dir}
if [ ! -d $workdir/$1 ]; then
echo "ERROR: No coverage data in $workdir/$1"
exit 1
fi
# Get original source path
gcno=$(cd $workdir/$1 && find -name '*.gcno' | head -n 1 | cut -d/ -f2-)
if [ -z "$gcno" ]; then
echo "ERROR: no gcno file found in $workdir/$1"
exit 1
fi
srcfile=$(strings $workdir/$1/${gcno} | grep "$(basename ${gcno%.gcno})$" | uniq)
srcdir=$(echo $srcfile | sed "s|/${gcno%%/*}/.*$||")
# Set up mounts for chroot to run gcovr in
# NOTE: We do not unmount these later, as we assume we are in a
# private mount namespace and they will go away on exit from
# it.
echo "Setting up mounts"
tmpdir=$(mktemp -d)
echo $tmpdir > $workdir/.runner_tmpdir
mkdir -p $tmpdir/{lower,upper,work,merged}
# NOTE: Could potentially use rbind here, but explicitly mounting
# just what we need seems safer
mount --bind / $tmpdir/lower
mount -t overlay -o lowerdir=$tmpdir/lower,upperdir=$tmpdir/upper,workdir=$tmpdir/work overlay $tmpdir/merged
mount --bind /proc $tmpdir/merged/proc
mount --bind /sys $tmpdir/merged/sys
mount --bind /dev $tmpdir/merged/dev
mount --bind /tmp $tmpdir/merged/tmp
# Bind in the data files
# NOTE: $workdir is bound instead of specifically just $workdir/$1,
# so that e.g. html output to another directory in /tmp will
# work as expected. A determined user may be able to shoot
# themselves in the foot, but for now the trade off seems
# acceptable.
mkdir -p $tmpdir/merged/$workdir
mount --bind $workdir $tmpdir/merged/$workdir
# Bind the source files to their expected location
mkdir -p $tmpdir/merged/$srcdir
mount --bind ${wgt_install_dir}/src $tmpdir/merged/$srcdir
echo "Entering chroot"
echo
exec chroot $tmpdir/merged \
/usr/bin/gcovr -r $srcdir --object-directory $workdir/$1 --gcov-filter-source-errors -s ${GCOV_RUNNER_GCOVR_OPTIONS}
}
# Helper to clean up after runner
gcovr_runner_cleanup() {
rm -rf $workdir/$1
if [ -f $workdir/.runner_tmpdir ]; then
tmpdir=$(cat $workdir/.runner_tmpdir)
rm -rf $tmpdir
rm -f $workdir/.runner_tmpdir
fi
if [ "$workdir" != "/tmp" ]; then
rmdir $workdir 2>/dev/null || true
fi
}
# Parse arguments
OPTS=$(getopt -o +hko:pw:c: --longoptions gcovr-runner,afm-test,command:,help,keep,gcovr-options:,pyagl,workdir: -n "$(basename $0)" -- "$@")
if [ $? -ne 0 ]; then
exit 1
fi
eval set -- "$OPTS"
runner=false
keep=false
wgt=""
cmd=""
options=""
afmtest=false
pyagl=true
workdir="/tmp/gcov"
while true; do
case "$1" in
--gcovr-runner) runner=true; shift;;
--afm-test) afmtest=true; pyagl=false; shift;;
-c|--command) cmd="$2"; shift; shift;;
-h|--help) usage; exit 0;;
-k|--keep) keep=true; shift;;
-o|--gcovr-options) options="$2"; shift; shift;;
-p|--pyagl) pyagl=true; afmtest=false; shift;;
-w|--workdir) workdir="$2"; shift; shift;;
--) shift; break;;
*) break;;
esac
done
# Encode the assumption that a specified command means it runs instead
# of any other tests.
if [ -s "$cmd" ]; then
pyagl=false
afmtest=false
fi
if [ $# -ne 1 ]; then
# Always expect widget name as single non-option argument
usage
exit 1
fi
# Rationalize workdir just in case
workdir=$(realpath "$workdir")
if [ "$runner" = "true" ]; then
if [ "${GCOV_RUNNER_READY}" != "true" ]; then
echo "ERROR: gcovr environment not ready!"
exit 1
fi
gcovr_runner $1
# If we get here, it'd be an error, so return 1
exit 1
fi
binding=$1
if [ "${1%.wgt}" != "$1" ]; then
# User has specified path to a widget file
wgt=$(realpath $1)
binding=$(basename "${1%-coverage.wgt}")
else
wgt=/usr/AGL/apps/coverage/${binding}-coverage.wgt
fi
if [ ! -f $wgt ]; then
echo "ERROR: No widget $wgt"
exit 1
elif [ "$afmtest" = "true" -a ! -f /usr/AGL/apps/test/${binding}-test.wgt ]; then
echo "ERROR: No test widget for $binding"
exit 1
fi
# Determine starting systemd unit name
service=$(systemctl --all |grep afm-service-$binding |sed 's/^[ *] \([^ ]*\).*/\1/')
if [ -z "$service" ]; then
echo "ERROR: Could not determine systemd service unit for $binding"
exit 1
fi
# Install coverage widget
echo "Removing $binding widget"
systemctl stop $service
afm-util remove $binding
echo
echo "Installing $binding coverage widget"
afm-util install $wgt
echo
wgt_install_dir=/var/local/lib/afm/applications/$binding
check_wgt_install ${wgt_install_dir}
gcov_src=${wgt_install_dir}/coverage
if [ ! -d ${gcov_src} ]; then
echo "ERROR: No coverage information in ${gcov_src}"
exit 1
elif [ ! -f ${gcov_src}/gcov.env ]; then
echo "ERROR: No gcov environment file at ${gcov_src}/gcov.env"
exit 1
fi
#
# NOTE: In theory, the coverage data collection could be done inside
# the mount namespace / chroot, but the potential for issues
# when doing that seems higher than just running gcovr there,
# so a conservative approach is taken.
#
# Set up things for the binary to write out gcda data files
#
# Having the matching build directory hierarchy in place and
# writeable by the target binary before any restart and testing is
# key to things working.
#
# As well, the environment file with the GCOV_PREFIX and
# GCOV_PREFIX_STRIP values needs to be present before running so the
# gcda files will get written into the relocated build hierarchy.
#
echo "Installing coverage information for $binding"
mkdir -p $workdir
rm -rf $workdir/$binding
cp -dr ${gcov_src} $workdir/$binding
chsmack -r -a System::Log $workdir
chmod -R go+w $workdir
# Install the gcov environment file
mkdir -p /etc/afm/widget.env.d/$binding
if [ "${workdir}" = "/tmp/gcov" ]; then
cp ${gcov_src}/gcov.env /etc/afm/widget.env.d/$binding/gcov
else
# Update GCOV_PREFIX to point into workdir
sed "s|^GCOV_PREFIX=.*|GCOV_PREFIX=${workdir}/$binding|" ${gcov_src}/gcov.env > /etc/afm/widget.env.d/$binding/gcov
fi
chsmack -r -a _ /etc/afm/widget.env.d/$binding
# Determine new systemd unit name (version may now be different)
service=$(systemctl --all |grep afm-service-$binding |sed 's/^[ *] \([^ ]*\).*/\1/')
if [ -z "$service" ]; then
echo "ERROR: Could not determine systemd service unit for $binding"
exit 1
fi
# Restart the binding
systemctl start $service
echo
# Run tests or given command
if [ -n "$cmd" ]; then
echo "Running command: $cmd"
export AGL_AVAILABLE_INTERFACES=${AGL_AVAILABLE_INTERFACES:-ethernet}
eval $cmd
elif [ "$pyagl" = "true" ]; then
echo "Running $binding pyagl tests"
export AGL_AVAILABLE_INTERFACES=${AGL_AVAILABLE_INTERFACES:-ethernet}
pytest -k "${binding#agl-service-} and not hwrequired" /usr/lib/python3.?/site-packages/pyagl
else
echo "Running $binding test widget"
# NOTE: su to agl-driver is required here to avoid fallout from
# the "afm-util run" in afm-test seemingly triggering the
# start of other per-user bindings for the root user.
su -l -c "/usr/bin/afm-test /usr/AGL/apps/test/${binding}-test.wgt" agl-driver
fi
# Restart again to trigger data file writing
systemctl restart $service
echo
# Run ourselves in gcovr runner mode inside a private mount namespace
export GCOV_RUNNER_READY=true
# NOTE: Passing gcovr options in the environment to avoid quoting hassles
export GCOV_RUNNER_GCOVR_OPTIONS="$options"
runner_options="--workdir ${workdir}"
unshare -m $0 --gcovr-runner ${runner_options} $binding
rc=$?
if [ "$keep" != "true" ]; then
# Clean up after ourselves
gcovr_runner_cleanup $1
rm -f /etc/afm/widget.env.d/$1/gcov
rmdir /etc/afm/widget.env.d/$1 2>/dev/null || true
fi
exit $rc
|