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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# kselftest_deps.sh
#
# Checks for kselftest build dependencies on the build system.
# Copyright (c) 2020 Shuah Khan <skhan@linuxfoundation.org>
#
#
usage()
{
echo -e "Usage: $0 -[p] <compiler> [test_name]\n"
echo -e "\tkselftest_deps.sh [-p] gcc"
echo -e "\tkselftest_deps.sh [-p] gcc mm"
echo -e "\tkselftest_deps.sh [-p] aarch64-linux-gnu-gcc"
echo -e "\tkselftest_deps.sh [-p] aarch64-linux-gnu-gcc mm\n"
echo "- Should be run in selftests directory in the kernel repo."
echo "- Checks if Kselftests can be built/cross-built on a system."
echo "- Parses all test/sub-test Makefile to find library dependencies."
echo "- Runs compile test on a trivial C file with LDLIBS specified"
echo " in the test Makefiles to identify missing library dependencies."
echo "- Prints suggested target list for a system filtering out tests"
echo " failed the build dependency check from the TARGETS in Selftests"
echo " main Makefile when optional -p is specified."
echo "- Prints pass/fail dependency check for each tests/sub-test."
echo "- Prints pass/fail targets and libraries."
echo "- Default: runs dependency checks on all tests."
echo "- Optional: test name can be specified to check dependencies for it."
exit 1
}
# Start main()
main()
{
base_dir=`pwd`
# Make sure we're in the selftests top-level directory.
if [ $(basename "$base_dir") != "selftests" ]; then
echo -e "\tPlease run $0 in"
echo -e "\ttools/testing/selftests directory ..."
exit 1
fi
print_targets=0
while getopts "p" arg; do
case $arg in
p)
print_targets=1
shift;;
esac
done
if [ $# -eq 0 ]
then
usage
fi
# Compiler
CC=$1
tmp_file=$(mktemp).c
trap "rm -f $tmp_file.o $tmp_file $tmp_file.bin" EXIT
#echo $tmp_file
pass=$(mktemp).out
trap "rm -f $pass" EXIT
#echo $pass
fail=$(mktemp).out
trap "rm -f $fail" EXIT
#echo $fail
# Generate tmp source fire for compile test
cat << "EOF" > $tmp_file
int main()
{
}
EOF
# Save results
total_cnt=0
fail_trgts=()
fail_libs=()
fail_cnt=0
pass_trgts=()
pass_libs=()
pass_cnt=0
# Get all TARGETS from selftests Makefile
targets=$(grep -E "^TARGETS +|^TARGETS =" Makefile | cut -d "=" -f2)
# Initially, in LDLIBS related lines, the dep checker needs
# to ignore lines containing the following strings:
filter="\$(VAR_LDLIBS)\|pkg-config\|PKG_CONFIG\|IOURING_EXTRA_LIBS"
# Single test case
if [ $# -eq 2 ]
then
test=$2/Makefile
l1_test $test
l2_test $test
l3_test $test
l4_test $test
l5_test $test
print_results $1 $2
exit $?
fi
# Level 1: LDLIBS set static.
#
# Find all LDLIBS set statically for all executables built by a Makefile
# and filter out VAR_LDLIBS to discard the following:
# gpio/Makefile:LDLIBS += $(VAR_LDLIBS)
# Append space at the end of the list to append more tests.
l1_tests=$(grep -r --include=Makefile "^LDLIBS" | \
grep -v "$filter" | awk -F: '{print $1}' | uniq)
# Level 2: LDLIBS set dynamically.
#
# Level 2
# Some tests have multiple valid LDLIBS lines for individual sub-tests
# that need dependency checks. Find them and append them to the tests
# e.g: mm/Makefile:$(OUTPUT)/userfaultfd: LDLIBS += -lpthread
# Filter out VAR_LDLIBS to discard the following:
# memfd/Makefile:$(OUTPUT)/fuse_mnt: LDLIBS += $(VAR_LDLIBS)
# Append space at the end of the list to append more tests.
l2_tests=$(grep -r --include=Makefile ": LDLIBS" | \
grep -v "$filter" | awk -F: '{print $1}' | uniq)
# Level 3
# memfd and others use pkg-config to find mount and fuse libs
# respectively and save it in VAR_LDLIBS. If pkg-config doesn't find
# any, VAR_LDLIBS set to default.
# Use the default value and filter out pkg-config for dependency check.
# e.g:
# memfd/Makefile
# VAR_LDLIBS := $(shell pkg-config fuse --libs 2>/dev/null)
l3_tests=$(grep -r --include=Makefile "^VAR_LDLIBS" | \
grep -v "pkg-config\|PKG_CONFIG" | awk -F: '{print $1}' | uniq)
# Level 4
# some tests may fall back to default using `|| echo -l<libname>`
# if pkg-config doesn't find the libs, instead of using VAR_LDLIBS
# as per level 3 checks.
# e.g:
# netfilter/Makefile
# LDLIBS += $(shell $(HOSTPKG_CONFIG) --libs libmnl 2>/dev/null || echo -lmnl)
l4_tests=$(grep -r --include=Makefile "^LDLIBS" | \
grep "pkg-config\|PKG_CONFIG" | awk -F: '{print $1}' | uniq)
# Level 5
# some tests may use IOURING_EXTRA_LIBS to add extra libs to LDLIBS,
# which in turn may be defined in a sub-Makefile
# e.g.:
# mm/Makefile
# $(OUTPUT)/gup_longterm: LDLIBS += $(IOURING_EXTRA_LIBS)
l5_tests=$(grep -r --include=Makefile "LDLIBS +=.*\$(IOURING_EXTRA_LIBS)" | \
awk -F: '{print $1}' | uniq)
#echo l1_tests $l1_tests
#echo l2_tests $l2_tests
#echo l3_tests $l3_tests
#echo l4_tests $l4_tests
#echo l5_tests $l5_tests
all_tests
print_results $1 $2
exit $?
}
# end main()
all_tests()
{
for test in $l1_tests; do
l1_test $test
done
for test in $l2_tests; do
l2_test $test
done
for test in $l3_tests; do
l3_test $test
done
for test in $l4_tests; do
l4_test $test
done
for test in $l5_tests; do
l5_test $test
done
}
# Use same parsing used for l1_tests and pick libraries this time.
l1_test()
{
test_libs=$(grep --include=Makefile "^LDLIBS" $test | \
grep -v "$filter" | \
sed -e 's/\:/ /' | \
sed -e 's/+/ /' | cut -d "=" -f 2)
check_libs $test $test_libs
}
# Use same parsing used for l2_tests and pick libraries this time.
l2_test()
{
test_libs=$(grep --include=Makefile ": LDLIBS" $test | \
grep -v "$filter" | \
sed -e 's/\:/ /' | sed -e 's/+/ /' | \
cut -d "=" -f 2)
check_libs $test $test_libs
}
l3_test()
{
test_libs=$(grep --include=Makefile "^VAR_LDLIBS" $test | \
grep -v "pkg-config" | sed -e 's/\:/ /' |
sed -e 's/+/ /' | cut -d "=" -f 2)
check_libs $test $test_libs
}
l4_test()
{
test_libs=$(grep --include=Makefile "^VAR_LDLIBS\|^LDLIBS" $test | \
grep "\(pkg-config\|PKG_CONFIG\).*|| echo " | \
sed -e 's/.*|| echo //' | sed -e 's/)$//')
check_libs $test $test_libs
}
l5_test()
{
tests=$(find $(dirname "$test") -type f -name "*.mk")
test_libs=$(grep "^IOURING_EXTRA_LIBS +\?=" $tests | \
cut -d "=" -f 2)
check_libs $test $test_libs
}
check_libs()
{
if [[ ! -z "${test_libs// }" ]]
then
#echo $test_libs
for lib in $test_libs; do
let total_cnt+=1
$CC -o $tmp_file.bin $lib $tmp_file > /dev/null 2>&1
if [ $? -ne 0 ]; then
echo "FAIL: $test dependency check: $lib" >> $fail
let fail_cnt+=1
fail_libs+="$lib "
fail_target=$(echo "$test" | cut -d "/" -f1)
fail_trgts+="$fail_target "
targets=$(echo "$targets" | grep -v "$fail_target")
else
echo "PASS: $test dependency check passed $lib" >> $pass
let pass_cnt+=1
pass_libs+="$lib "
pass_trgts+="$(echo "$test" | cut -d "/" -f1) "
fi
done
fi
}
print_results()
{
echo -e "========================================================";
echo -e "Kselftest Dependency Check for [$0 $1 $2] results..."
if [ $print_targets -ne 0 ]
then
echo -e "Suggested Selftest Targets for your configuration:"
echo -e "$targets";
fi
echo -e "========================================================";
echo -e "Checked tests defining LDLIBS dependencies"
echo -e "--------------------------------------------------------";
echo -e "Total tests with Dependencies:"
echo -e "$total_cnt Pass: $pass_cnt Fail: $fail_cnt";
if [ $pass_cnt -ne 0 ]; then
echo -e "--------------------------------------------------------";
cat $pass
echo -e "--------------------------------------------------------";
echo -e "Targets passed build dependency check on system:"
echo -e "$(echo "$pass_trgts" | xargs -n1 | sort -u | xargs)"
fi
if [ $fail_cnt -ne 0 ]; then
echo -e "--------------------------------------------------------";
cat $fail
echo -e "--------------------------------------------------------";
echo -e "Targets failed build dependency check on system:"
echo -e "$(echo "$fail_trgts" | xargs -n1 | sort -u | xargs)"
echo -e "--------------------------------------------------------";
echo -e "Missing libraries system"
echo -e "$(echo "$fail_libs" | xargs -n1 | sort -u | xargs)"
fi
echo -e "--------------------------------------------------------";
echo -e "========================================================";
}
main "$@"