#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# kselftest_deps.sh
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#
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# Checks for kselftest build dependencies on the build system.
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# Copyright (c) 2020 Shuah Khan <skhan@linuxfoundation.org>
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#
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#
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usage()
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{
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echo -e "Usage: $0 -[p] <compiler> [test_name]\n"
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echo -e "\tkselftest_deps.sh [-p] gcc"
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echo -e "\tkselftest_deps.sh [-p] gcc vm"
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echo -e "\tkselftest_deps.sh [-p] aarch64-linux-gnu-gcc"
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echo -e "\tkselftest_deps.sh [-p] aarch64-linux-gnu-gcc vm\n"
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echo "- Should be run in selftests directory in the kernel repo."
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echo "- Checks if Kselftests can be built/cross-built on a system."
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echo "- Parses all test/sub-test Makefile to find library dependencies."
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echo "- Runs compile test on a trivial C file with LDLIBS specified"
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echo " in the test Makefiles to identify missing library dependencies."
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echo "- Prints suggested target list for a system filtering out tests"
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echo " failed the build dependency check from the TARGETS in Selftests"
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echo " main Makefile when optional -p is specified."
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echo "- Prints pass/fail dependency check for each tests/sub-test."
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echo "- Prints pass/fail targets and libraries."
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echo "- Default: runs dependency checks on all tests."
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echo "- Optional test name can be specified to check dependencies for it."
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exit 1
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}
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# Start main()
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main()
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{
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base_dir=`pwd`
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# Make sure we're in the selftests top-level directory.
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if [ $(basename "$base_dir") != "selftests" ]; then
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echo -e "\tPlease run $0 in"
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echo -e "\ttools/testing/selftests directory ..."
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exit 1
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fi
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print_targets=0
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while getopts "p" arg; do
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case $arg in
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p)
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print_targets=1
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shift;;
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esac
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done
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if [ $# -eq 0 ]
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then
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usage
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fi
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# Compiler
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CC=$1
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tmp_file=$(mktemp).c
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trap "rm -f $tmp_file.o $tmp_file $tmp_file.bin" EXIT
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#echo $tmp_file
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pass=$(mktemp).out
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trap "rm -f $pass" EXIT
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#echo $pass
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fail=$(mktemp).out
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trap "rm -f $fail" EXIT
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#echo $fail
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# Generate tmp source fire for compile test
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cat << "EOF" > $tmp_file
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int main()
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{
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}
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EOF
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# Save results
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total_cnt=0
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fail_trgts=()
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fail_libs=()
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fail_cnt=0
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pass_trgts=()
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pass_libs=()
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pass_cnt=0
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# Get all TARGETS from selftests Makefile
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targets=$(egrep "^TARGETS +|^TARGETS =" Makefile | cut -d "=" -f2)
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# Single test case
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if [ $# -eq 2 ]
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then
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test=$2/Makefile
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l1_test $test
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l2_test $test
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l3_test $test
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print_results $1 $2
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exit $?
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fi
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# Level 1: LDLIBS set static.
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#
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# Find all LDLIBS set statically for all executables built by a Makefile
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# and filter out VAR_LDLIBS to discard the following:
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# gpio/Makefile:LDLIBS += $(VAR_LDLIBS)
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# Append space at the end of the list to append more tests.
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l1_tests=$(grep -r --include=Makefile "^LDLIBS" | \
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grep -v "VAR_LDLIBS" | awk -F: '{print $1}')
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# Level 2: LDLIBS set dynamically.
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#
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# Level 2
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# Some tests have multiple valid LDLIBS lines for individual sub-tests
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# that need dependency checks. Find them and append them to the tests
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# e.g: vm/Makefile:$(OUTPUT)/userfaultfd: LDLIBS += -lpthread
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# Filter out VAR_LDLIBS to discard the following:
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# memfd/Makefile:$(OUTPUT)/fuse_mnt: LDLIBS += $(VAR_LDLIBS)
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# Append space at the end of the list to append more tests.
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l2_tests=$(grep -r --include=Makefile ": LDLIBS" | \
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grep -v "VAR_LDLIBS" | awk -F: '{print $1}')
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# Level 3
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# gpio, memfd and others use pkg-config to find mount and fuse libs
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# respectively and save it in VAR_LDLIBS. If pkg-config doesn't find
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# any, VAR_LDLIBS set to default.
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# Use the default value and filter out pkg-config for dependency check.
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# e.g:
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# gpio/Makefile
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# VAR_LDLIBS := $(shell pkg-config --libs mount) 2>/dev/null)
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# memfd/Makefile
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# VAR_LDLIBS := $(shell pkg-config fuse --libs 2>/dev/null)
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l3_tests=$(grep -r --include=Makefile "^VAR_LDLIBS" | \
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grep -v "pkg-config" | awk -F: '{print $1}')
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#echo $l1_tests
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#echo $l2_1_tests
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#echo $l3_tests
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all_tests
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print_results $1 $2
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exit $?
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}
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# end main()
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all_tests()
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{
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for test in $l1_tests; do
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l1_test $test
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done
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for test in $l2_tests; do
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l2_test $test
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done
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for test in $l3_tests; do
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l3_test $test
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done
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}
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# Use same parsing used for l1_tests and pick libraries this time.
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l1_test()
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{
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test_libs=$(grep --include=Makefile "^LDLIBS" $test | \
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grep -v "VAR_LDLIBS" | \
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sed -e 's/\:/ /' | \
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sed -e 's/+/ /' | cut -d "=" -f 2)
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check_libs $test $test_libs
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}
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# Use same parsing used for l2__tests and pick libraries this time.
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l2_test()
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{
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test_libs=$(grep --include=Makefile ": LDLIBS" $test | \
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grep -v "VAR_LDLIBS" | \
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sed -e 's/\:/ /' | sed -e 's/+/ /' | \
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cut -d "=" -f 2)
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check_libs $test $test_libs
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}
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l3_test()
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{
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test_libs=$(grep --include=Makefile "^VAR_LDLIBS" $test | \
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grep -v "pkg-config" | sed -e 's/\:/ /' |
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sed -e 's/+/ /' | cut -d "=" -f 2)
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check_libs $test $test_libs
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}
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check_libs()
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{
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if [[ ! -z "${test_libs// }" ]]
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then
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#echo $test_libs
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for lib in $test_libs; do
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let total_cnt+=1
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$CC -o $tmp_file.bin $lib $tmp_file > /dev/null 2>&1
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if [ $? -ne 0 ]; then
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echo "FAIL: $test dependency check: $lib" >> $fail
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let fail_cnt+=1
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fail_libs+="$lib "
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fail_target=$(echo "$test" | cut -d "/" -f1)
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fail_trgts+="$fail_target "
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targets=$(echo "$targets" | grep -v "$fail_target")
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else
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echo "PASS: $test dependency check passed $lib" >> $pass
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let pass_cnt+=1
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pass_libs+="$lib "
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pass_trgts+="$(echo "$test" | cut -d "/" -f1) "
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fi
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done
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fi
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}
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print_results()
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{
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echo -e "========================================================";
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echo -e "Kselftest Dependency Check for [$0 $1 $2] results..."
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if [ $print_targets -ne 0 ]
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then
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echo -e "Suggested Selftest Targets for your configuration:"
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echo -e "$targets";
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fi
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echo -e "========================================================";
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echo -e "Checked tests defining LDLIBS dependencies"
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echo -e "--------------------------------------------------------";
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echo -e "Total tests with Dependencies:"
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echo -e "$total_cnt Pass: $pass_cnt Fail: $fail_cnt";
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if [ $pass_cnt -ne 0 ]; then
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echo -e "--------------------------------------------------------";
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cat $pass
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echo -e "--------------------------------------------------------";
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echo -e "Targets passed build dependency check on system:"
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echo -e "$(echo "$pass_trgts" | xargs -n1 | sort -u | xargs)"
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fi
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if [ $fail_cnt -ne 0 ]; then
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echo -e "--------------------------------------------------------";
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cat $fail
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echo -e "--------------------------------------------------------";
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echo -e "Targets failed build dependency check on system:"
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echo -e "$(echo "$fail_trgts" | xargs -n1 | sort -u | xargs)"
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echo -e "--------------------------------------------------------";
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echo -e "Missing libraries system"
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echo -e "$(echo "$fail_libs" | xargs -n1 | sort -u | xargs)"
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fi
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echo -e "--------------------------------------------------------";
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echo -e "========================================================";
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}
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main "$@"
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