oss-fuzz/projects/libcst/fuzz_transformer.py

59 lines
1.6 KiB
Python

#!/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
import pysecsan
pysecsan.sanlib.sanitizer_log_level = 30
pysecsan.add_hooks()
import libcst
from libcst import parse_module
from libcst import PartialParserConfig, ParserSyntaxError
from libcst.codemod._context import CodemodContext
from libcst.codemod._runner import SkipFile
from libcst.codemod.commands.unnecessary_format_string import UnnecessaryFormatString
def TestOneInput(data):
fdp = atheris.FuzzedDataProvider(data)
context = CodemodContext()
transform_instance = UnnecessaryFormatString(context)
inp = fdp.ConsumeUnicodeNoSurrogates(sys.maxsize)
try:
input_tree = parse_module(
inp,
config=PartialParserConfig()
)
try:
output_tree = transform_instance.transform_module(input_tree)
except SkipFile:
pass
except ParserSyntaxError:
pass
except RecursionError:
pass
def main():
atheris.instrument_all()
atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
atheris.Fuzz()
if __name__ == "__main__":
main()