importlib_metadata: initial integration (#9962)

Signed-off-by: David Korczynski <david@adalogics.com>

projects/importlib_metadata/Dockerfile

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+#!/usr/bin/python3
+
+# Copyright 2023 Google LLC
+#
+# 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.
+#
+##########################################################################
+FROM gcr.io/oss-fuzz-base/base-builder-python
+RUN pip3 install --upgrade pip
+RUN git clone https://github.com/python/importlib_metadata importlib_metadata
+COPY *.sh *py $SRC/
+WORKDIR $SRC/importlib_metadata

projects/importlib_metadata/build.sh

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+#!/bin/bash -eu
+
+# Copyright 2023 Google LLC
+#
+# 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.
+#
+##########################################################################
+pip3 install .
+# Build fuzzers in $OUT.
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done

projects/importlib_metadata/fuzz_importlib.py

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+#!/usr/bin/python3
+
+# Copyright 2023 Google LLC
+#
+# 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.
+#
+##########################################################################
+import sys
+import atheris
+
+from importlib_metadata import (
+    Distribution,
+    EntryPoints,
+    PathDistribution,
+)
+
+
+def TestOneInput(data):
+  fdp = atheris.FuzzedDataProvider(data)
+  fuzz_str = fdp.ConsumeUnicodeNoSurrogates(fdp.ConsumeIntInRange(1, 1024))
+  list(Distribution._deps_from_requires_text(fuzz_str))
+  try:
+    list(EntryPoints._from_text(fuzz_str))
+  except TypeError:
+    pass
+  PathDistribution._name_from_stem(fuzz_str)
+
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/importlib_metadata/project.yaml

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+fuzzing_engines:
+- libfuzzer
+homepage: https://github.com/python/importlib_metadata
+language: python
+main_repo: https://github.com/python/importlib_metadata
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com