#!/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 io
import msgpack


def TestOneInput(data):
  b = io.BytesIO(data)
  r = None
  try:
    r = msgpack.unpack(b)
  except (
    # Catch exceptions as indicated:
    # https://github.com/msgpack/msgpack-python/blob/main/msgpack/fallback.py#L110-L121
    ValueError,
    msgpack.exceptions.FormatError,
    msgpack.exceptions.StackError,
    msgpack.exceptions.ExtraData
  ) as e:
    pass

  if r is not None:
    del r
  del b


def main():
  atheris.instrument_all()
  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
  atheris.Fuzz()


if __name__ == "__main__":
  main()