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Add support for multiple fuzz sanitizers #580

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merged 1 commit into from
Feb 16, 2022
Merged

Add support for multiple fuzz sanitizers #580

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51 changes: 25 additions & 26 deletions tests/fuzz/oss_fuzz_build.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -21,9 +21,7 @@ GOPATH="${GOPATH:-/root/go}"
GO_SRC="${GOPATH}/src"
PROJECT_PATH="github.com/fluxcd/source-controller"

cd "${GO_SRC}"

pushd "${PROJECT_PATH}"
pushd "${GO_SRC}/${PROJECT_PATH}"

export TARGET_DIR="$(/bin/pwd)/build/libgit2/${LIBGIT2_TAG}"

Expand Down Expand Up @@ -58,9 +56,7 @@ export CGO_LDFLAGS="$(pkg-config --libs --static --cflags libssh2 openssl libgit

go mod tidy -compat=1.17

popd

pushd "${PROJECT_PATH}/tests/fuzz"
pushd "tests/fuzz"

# Setup files to be embedded into controllers_fuzzer.go's testFiles variable.
mkdir -p testdata/crd
Expand All @@ -69,28 +65,31 @@ cp -r ../../controllers/testdata/certs testdata/

go mod tidy -compat=1.17

# ref: https://github.com/google/oss-fuzz/blob/master/infra/base-images/base-builder/compile_go_fuzzer
go-fuzz -tags gofuzz -func=FuzzRandomGitFiles -o gitrepository_fuzzer.a .
clang -o /out/fuzz_random_git_files \
gitrepository_fuzzer.a \
"${TARGET_DIR}/lib/libgit2.a" \
"${TARGET_DIR}/lib/libssh2.a" \
"${TARGET_DIR}/lib/libz.a" \
"${TARGET_DIR}/lib64/libssl.a" \
"${TARGET_DIR}/lib64/libcrypto.a" \
-fsanitize=fuzzer

go-fuzz -tags gofuzz -func=FuzzGitResourceObject -o fuzz_git_resource_object.a .
clang -o /out/fuzz_git_resource_object \
fuzz_git_resource_object.a \
"${TARGET_DIR}/lib/libgit2.a" \
"${TARGET_DIR}/lib/libssh2.a" \
"${TARGET_DIR}/lib/libz.a" \
"${TARGET_DIR}/lib64/libssl.a" \
"${TARGET_DIR}/lib64/libcrypto.a" \
-fsanitize=fuzzer
# Using compile_go_fuzzer to compile fails when statically linking libgit2 dependencies
# via CFLAGS/CXXFLAGS.
function go_compile(){
function=$1
fuzzer=$2

if [[ $SANITIZER = *coverage* ]]; then
# ref: https://github.com/google/oss-fuzz/blob/master/infra/base-images/base-builder/compile_go_fuzzer
compile_go_fuzzer "${PROJECT_PATH}/tests/fuzz" "${function}" "${fuzzer}"
else
go-fuzz -tags gofuzz -func="${function}" -o "${fuzzer}.a" .
${CXX} ${CXXFLAGS} ${LIB_FUZZING_ENGINE} -o "${OUT}/${fuzzer}" \
"${fuzzer}.a" \
"${TARGET_DIR}/lib/libgit2.a" "${TARGET_DIR}/lib/libssh2.a" \
"${TARGET_DIR}/lib/libz.a" "${TARGET_DIR}/lib64/libssl.a" \
"${TARGET_DIR}/lib64/libcrypto.a" \
-fsanitize="${SANITIZER}"
fi
}

go_compile FuzzRandomGitFiles fuzz_gitrepository_fuzzer
go_compile FuzzGitResourceObject fuzz_git_resource_object

# By now testdata is embedded in the binaries and no longer needed.
rm -rf testdata/

popd
popd