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Commit b718d671 authored by Zach Johnson's avatar Zach Johnson
Browse files

Add gd/fuzzing/helpers 

A comon place for common helpers across fuzz tests for GD.

Test: new fuzz test I'm working on
Change-Id: I9897edd3822173e78a6f1028c2c3ff58fac61732
parent 955d9f66

system/gd/fuzzing/Android.bp

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filegroup {

    name: "BluetoothFuzzingHelperSources",

    srcs: [

        "helpers.cc",

    ],

}

system/gd/fuzzing/helpers.cc

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/*

 * Copyright 2020 The Android Open Source Project

 *

 * 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.

 */



#include "fuzzing/helpers.h"



namespace bluetooth {

namespace fuzzing {



// cribbed from https://github.com/google/fuzzing/blob/master/docs/split-inputs.md#magic-separator

std::vector<std::vector<uint8_t>> SplitInput(const uint8_t* data, size_t size, const uint8_t* separator,

                                             size_t separatorSize) {

  std::vector<std::vector<uint8_t>> result;

  assert(SeparatorSize > 0);

  auto beg = data;

  auto end = data + size;

  while (const uint8_t* pos = (const uint8_t*)memmem(beg, end - beg, separator, separatorSize)) {

    result.push_back({beg, pos});

    beg = pos + separatorSize;

  }

  if (beg < end) {

    result.push_back({beg, end});

  }

  return result;

}



}  // namespace fuzzing

}  // namespace bluetooth

system/gd/fuzzing/helpers.h

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/*

 * Copyright 2020 The Android Open Source Project

 *

 * 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.

 */



#pragma once



#include <cstdint>

#include <vector>



namespace bluetooth {

namespace fuzzing {



std::vector<std::vector<uint8_t>> SplitInput(const uint8_t* data, size_t size, const uint8_t* separator,

                                             size_t separatorSize);



}

}  // namespace bluetooth