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#!/bin/bash -eu
# Copyright 2018 Google Inc.
#
# 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.
#
################################################################################
# Force Python3, run configure.py to pick the right build config
PYTHON=python3
yes "" | ${PYTHON} configure.py
# Since Bazel passes flags to compilers via `--copt`, `--conlyopt` and
# `--cxxopt`, we need to move all flags from `$CFLAGS` and `$CXXFLAGS` to these.
# We don't use `--copt` as warnings issued by C compilers when encountering a
# C++-only option results in errors during build.
#
# Note: Make sure that by this line `$CFLAGS` and `$CXXFLAGS` are properly set
# up as further changes to them won't be visible to Bazel.
#
# Note: for builds using the undefined behavior sanitizer we need to link
# `clang_rt` ubsan library. Since Bazel uses `clang` for linking instead of
# `clang++`, we need to add the additional `--linkopt` flag.
# See issue: https://github.com/bazelbuild/bazel/issues/8777
declare -r EXTRA_FLAGS="\
$(
for f in ${CFLAGS}; do
echo "--conlyopt=${f}" "--linkopt=${f}"
done
for f in ${CXXFLAGS}; do
echo "--cxxopt=${f}" "--linkopt=${f}"
done
if [ "$SANITIZER" = "undefined" ]
then
echo "--linkopt=$(find $(llvm-config --libdir) -name libclang_rt.ubsan_standalone_cxx-x86_64.a | head -1)"
fi
)"
# Determine all fuzz targets. To control what gets fuzzed with OSSFuzz, all
# supported fuzzers are in `//tensorflow/security/fuzzing`.
# Ignore the identity and AttrValues fuzzer in opensource.
declare -r FUZZERS=$(bazel query 'kind(cc_.*, tests(//tensorflow/security/fuzzing/...))' | grep -v identity | grep -v AttrValues | grep -v bfloat16)
# Build the fuzzer targets.
# Pass in `--config=libc++` to link against libc++.
# Pass in `--verbose_failures` so it is easy to debug compile crashes.
# Pass in `--strip=never` to ensure coverage support.
# Pass in `$LIB_FUZZING_ENGINE` to `--copt` and `--linkopt` to ensure we have a
# `main` symbol defined (all these fuzzers build without a `main` and by default
# `$CFLAGS` and `CXXFLAGS` compile with `-fsanitize=fuzzer-no-link`).
# Since we have `assert` in fuzzers, make sure `NDEBUG` is not defined
bazel build \
--config=libc++ \
${EXTRA_FLAGS} \
--verbose_failures \
--strip=never \
--copt=${LIB_FUZZING_ENGINE} \
--linkopt=${LIB_FUZZING_ENGINE} \
--copt='-UNDEBUG' \
-- ${FUZZERS}
# The fuzzers built above are in the `bazel-bin/` symlink. But they need to be
# in `$OUT`, so move them accordingly.
for bazel_target in ${FUZZERS}; do
colon_index=$(expr index "${bazel_target}" ":")
fuzz_name="${bazel_target:$colon_index}"
bazel_location="bazel-bin/${bazel_target/:/\/}"
cp ${bazel_location} ${OUT}/$fuzz_name
done
# For coverage, we need to remap source files to correspond to the Bazel build
# paths. We also need to resolve all symlinks that Bazel creates.
if [ "$SANITIZER" = "coverage" ]
then
declare -r RSYNC_CMD="rsync -aLkR"
declare -r REMAP_PATH=${OUT}/proc/self/cwd/
mkdir -p ${REMAP_PATH}
# Sync existing code.
${RSYNC_CMD} tensorflow/ ${REMAP_PATH}
# Sync generated proto files.
${RSYNC_CMD} ./bazel-out/k8-opt/bin/tensorflow/core/protobuf ${REMAP_PATH}
# Sync external dependencies. We don't need to include `bazel-tensorflow`.
pushd bazel-tensorflow
${RSYNC_CMD} external/ ${REMAP_PATH}
popd
fi
# Finally, make sure we don't accidentally run with stuff from the bazel cache.
rm -f bazel-*
|
