mirror of
https://github.com/webmproject/libwebp.git
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b78d39571f
oss-fuzz does not support dynamic libraries so we stick to static. But libtiff.a has undefined symbols on Ubuntu, so we have to disable TIFF. Change-Id: Ibd1932f5780a0af51b6b398ae6415eed8685a0be
87 lines
3.4 KiB
Bash
87 lines
3.4 KiB
Bash
#!/bin/bash
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# Copyright 2018 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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################################################################################
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# This script is meant to be run by the oss-fuzz infrastructure from the script
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# https://github.com/google/oss-fuzz/blob/master/projects/libwebp/build.sh
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# It builds the different fuzz targets.
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# Only the libfuzzer engine is supported.
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# To test changes to this file:
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# - make changes and commit to your REPO
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# - run:
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# git clone --depth=1 git@github.com:google/oss-fuzz.git
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# cd oss-fuzz
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# - modify projects/libwebp/Dockerfile to point to your REPO
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# - run:
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# python3 infra/helper.py build_image libwebp
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# # enter 'y' and wait for everything to be downloaded
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# - run:
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# python3 infra/helper.py build_fuzzers --sanitizer address libwebp
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# # wait for the tests to be built
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# And then run the fuzzer locally, for example:
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# python3 infra/helper.py run_fuzzer libwebp \
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# --sanitizer address \
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# animencoder_fuzzer@AnimEncoder.AnimEncoderTest
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set -eu
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EXTRA_CMAKE_FLAGS=""
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export CXXFLAGS="${CXXFLAGS} -DFUZZTEST_COMPATIBILITY_MODE"
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EXTRA_CMAKE_FLAGS="-DFUZZTEST_COMPATIBILITY_MODE=libfuzzer"
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# limit allocation size to reduce spurious OOMs
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WEBP_CFLAGS="$CFLAGS -DWEBP_MAX_IMAGE_SIZE=838860800" # 800MiB
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export CFLAGS="$WEBP_CFLAGS"
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cmake -S . -B build -DWEBP_BUILD_FUZZTEST=ON ${EXTRA_CMAKE_FLAGS}
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cd build && make -j$(nproc) && cd ..
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find $SRC/libwebp-test-data -type f -size -32k -iname "*.webp" \
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-exec zip -qju fuzz_seed_corpus.zip "{}" \;
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# The following is taken from https://github.com/google/oss-fuzz/blob/31ac7244748ea7390015455fb034b1f4eda039d9/infra/base-images/base-builder/compile_fuzztests.sh#L59
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# Iterate the fuzz binaries and list each fuzz entrypoint in the binary. For
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# each entrypoint create a wrapper script that calls into the binaries the
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# given entrypoint as argument.
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# The scripts will be named:
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# {binary_name}@{fuzztest_entrypoint}
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FUZZ_TEST_BINARIES_OUT_PATHS=$(find ./build/tests/fuzzer/ -executable -type f)
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echo "Fuzz binaries: $FUZZ_TEST_BINARIES_OUT_PATHS"
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for fuzz_main_file in $FUZZ_TEST_BINARIES_OUT_PATHS; do
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FUZZ_TESTS=$($fuzz_main_file --list_fuzz_tests | cut -d ' ' -f 4)
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cp -f ${fuzz_main_file} $OUT/
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fuzz_basename=$(basename $fuzz_main_file)
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chmod -x $OUT/$fuzz_basename
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for fuzz_entrypoint in $FUZZ_TESTS; do
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TARGET_FUZZER="${fuzz_basename}@$fuzz_entrypoint"
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# Write executer script
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cat << EOF > $OUT/$TARGET_FUZZER
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#!/bin/sh
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# LLVMFuzzerTestOneInput for fuzzer detection.
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this_dir=\$(dirname "\$0")
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export TEST_DATA_DIRS=\$this_dir/corpus
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chmod +x \$this_dir/$fuzz_basename
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\$this_dir/$fuzz_basename --fuzz=$fuzz_entrypoint -- \$@
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chmod -x \$this_dir/$fuzz_basename
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EOF
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chmod +x $OUT/$TARGET_FUZZER
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done
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# Copy data.
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cp fuzz_seed_corpus.zip $OUT/${fuzz_basename}_seed_corpus.zip
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cp tests/fuzzer/fuzz.dict $OUT/${fuzz_basename}.dict
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done
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