coveragepy: initial integration (#8161)

* coveragepy: initial integration

* add maintainer as primary contact

projects/coveragepy/Dockerfile

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+# Copyright 2022 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 update && apt-get install -y make autoconf automake libtool
+RUN git clone --depth 1 https://github.com/nedbat/coveragepy
+WORKDIR coveragepy
+COPY build.sh *.py $SRC/

projects/coveragepy/build.sh

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+#!/bin/bash -eu
+# Copyright 2022 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 .
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done

projects/coveragepy/fuzz_parse.py

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+#!/usr/bin/python3
+# Copyright 2022 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 coverage.exceptions import NotPython
+from coverage.parser import PythonParser
+
+
+def TestOneInput(data):
+    """Fuzzer for PythonParser"""
+    fdp = atheris.FuzzedDataProvider(data)
+    
+    t = fdp.ConsumeUnicodeNoSurrogates(1024)
+    if not t:
+        return
+    
+    try:
+        p = PythonParser(text = t)
+        p.parse_source()
+    except (NotPython, MemoryError) as e2:
+        # Catch Memory error for stack overflows
+        # Catch NotPython issues raised by coveragepy
+        pass
+    except ValueError as e:
+        if "source code string cannot contain null bytes" in str(e):
+            # Not interesting
+            pass
+        else:
+            raise e
+
+
+def main():
+    atheris.instrument_all()
+    atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+    atheris.Fuzz()
+
+
+if __name__ == "__main__":
+    main()

projects/coveragepy/project.yaml

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+homepage: "https://github.com/nedbat/coveragepy/"
+language: python
+primary_contact: "ned@nedbatchelder.com"
+main_repo: "https://github.com/nedbat/coveragepy"
+fuzzing_engines:
+- libfuzzer
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com
+- adam@adalogics.com