cffi: initial integration (#9349)

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

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

projects/cffi/Dockerfile

@@ -0,0 +1,19 @@
+#!/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 apt-get install -y libffi-dev mercurial
+RUN hg clone https://foss.heptapod.net/pypy/cffi cffi
+COPY *.sh *py $SRC/
+WORKDIR $SRC/cffi

projects/cffi/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/cffi/fuzz_recompiler.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 cffi import FFI, VerificationError, FFIError, CDefError
+from cffi import recompiler
+
+
+def TestOneInput(data):
+  fdp = atheris.FuzzedDataProvider(data)
+  ffi = FFI()
+  try:
+    ffi.cdef(fdp.ConsumeUnicodeNoSurrogates(sys.maxsize))
+    recomp = recompiler.Recompiler(ffi, 'fuzzmod')
+
+    # Call functions on the recompiler object.
+    recomp.collect_type_table()
+    recomp.collect_step_tables()
+  except (VerificationError, FFIError, CDefError) as e:
+    pass
+  except AssertionError:
+    pass
+
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/cffi/project.yaml

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+fuzzing_engines:
+- libfuzzer
+homepage: https://foss.heptapod.net/pypy/cffi
+language: python
+main_repo: https://foss.heptapod.net/pypy/cffi
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com