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test/fuzz: enable lcov for llvm-fuzzing

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Lcov is disable for clang due to being time-consuming. This patch
enabled it for fuzzer only. `llvm-gcov.sh` is a wrapper for llvm-cov

Signed-off-by: Sebastian Brzezinka <sebastian.brzezinka@intel.com>
Change-Id: I96ef6ad4fc4ecb92b063070fd2410ca88209f5b7
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15356
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Sebastian Brzezinka 2022-11-09 11:44:31 +00:00 committed by Tomasz Zawadzki
parent a3ae6eaa75
commit c5d0fac1b9
2 changed files with 56 additions and 0 deletions
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50
test/fuzz/llvm.sh
View File

@ -14,9 +14,59 @@ llvm_out=$output_dir/llvm
mkdir -p $rootdir/../corpus/ $llvm_out
function lcov_start() {
local out=$llvm_out
local src=$rootdir
if hash lcov; then
export LCOV_OPTS="
--rc lcov_branch_coverage=1
--rc lcov_function_coverage=1
--rc genhtml_branch_coverage=1
--rc genhtml_function_coverage=1
--rc genhtml_legend=1
--rc geninfo_all_blocks=1
--gcov-tool $rootdir/test/fuzz/llvm/llvm-gcov.sh
"
export LCOV="lcov $LCOV_OPTS --no-external"
# Print lcov version to log
$LCOV -v
# zero out coverage data
$LCOV -q -c -i -t "Baseline" -d $src -o $out/cov_base.info
fi
}
function lcov_stop() {
local out=$llvm_out
local src=$rootdir
if hash lcov; then
# generate coverage data and combine with baseline
$LCOV -q -c -d $src -t "$(hostname)" -o $out/cov_test.info
$LCOV -q -a $out/cov_base.info -a $out/cov_test.info -o $out/cov_total.info
$LCOV -q -r $out/cov_total.info '*/dpdk/*' -o $out/cov_total.info
$LCOV -q -r $out/cov_total.info '/usr/*' -o $out/cov_total.info
owner=$(stat -c "%U" .)
sudo -u $owner git clean -f "*.gcda"
rm -f cov_base.info cov_test.info OLD_STDOUT OLD_STDERR
fi
}
# Collect coverage data when run fuzzers for longer period of time
# this allow to check coverage progression between runs, and grow of corpus files
if [[ $SPDK_TEST_FUZZER -eq 1 || $SPDK_TEST_FUZZER_SHORT -eq 0 ]]; then
lcov_start
fi
for fuzzer in "${fuzzers[@]}"; do
case "$fuzzer" in
nvmf) run_test "nvmf_fuzz" "$testdir/llvm/$fuzzer/run.sh" ;;
vfio) run_test "vfio_fuzz" "$testdir/llvm/$fuzzer/run.sh" ;;
esac
done
if [[ $SPDK_TEST_FUZZER -eq 1 || $SPDK_TEST_FUZZER_SHORT -eq 0 ]]; then
lcov_stop
genhtml $llvm_out/cov_total.info --output-directory $llvm_out
fi

6
test/fuzz/llvm/llvm-gcov.sh Executable file
View File

@ -0,0 +1,6 @@
#!/bin/bash
# SPDX-License-Identifier: BSD-3-Clause
# All rights reserved.
# Wrapper for llvm gcov, --gcov-tool
exec llvm-cov gcov "$@"