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71 lines
3.1 KiB
71 lines
3.1 KiB
4 months ago
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/*
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* Copyright 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <functional>
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#include "fuzzer/FuzzedDataProvider.h"
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#include "utils/BitSet.h"
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static constexpr uint8_t MAX_OPERATIONS = 50;
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// We need to handle both 32 and 64 bit bitsets, so we use a function template
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// here. Sadly, std::function can't be generic, so we generate a vector of
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// std::functions using this function.
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template <typename T>
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std::vector<std::function<void(T, uint32_t)>> getOperationsForType() {
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return {
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[](T bs, uint32_t val) -> void { bs.markBit(val); },
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[](T bs, uint32_t val) -> void { bs.valueForBit(val); },
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[](T bs, uint32_t val) -> void { bs.hasBit(val); },
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[](T bs, uint32_t val) -> void { bs.clearBit(val); },
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[](T bs, uint32_t val) -> void { bs.getIndexOfBit(val); },
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[](T bs, uint32_t) -> void { bs.clearFirstMarkedBit(); },
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[](T bs, uint32_t) -> void { bs.markFirstUnmarkedBit(); },
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[](T bs, uint32_t) -> void { bs.clearLastMarkedBit(); },
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[](T bs, uint32_t) -> void { bs.clear(); },
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[](T bs, uint32_t) -> void { bs.count(); },
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[](T bs, uint32_t) -> void { bs.isEmpty(); },
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[](T bs, uint32_t) -> void { bs.isFull(); },
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[](T bs, uint32_t) -> void { bs.firstMarkedBit(); },
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[](T bs, uint32_t) -> void { bs.lastMarkedBit(); },
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};
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}
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// Our operations for 32 and 64 bit bitsets
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static const std::vector<std::function<void(android::BitSet32, uint32_t)>> thirtyTwoBitOps =
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getOperationsForType<android::BitSet32>();
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static const std::vector<std::function<void(android::BitSet64, uint32_t)>> sixtyFourBitOps =
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getOperationsForType<android::BitSet64>();
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void runOperationFor32Bit(android::BitSet32 bs, uint32_t bit, uint8_t operation) {
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thirtyTwoBitOps[operation](bs, bit);
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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FuzzedDataProvider dataProvider(data, size);
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uint32_t thirty_two_base = dataProvider.ConsumeIntegral<uint32_t>();
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uint64_t sixty_four_base = dataProvider.ConsumeIntegral<uint64_t>();
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android::BitSet32 b1 = android::BitSet32(thirty_two_base);
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android::BitSet64 b2 = android::BitSet64(sixty_four_base);
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size_t opsRun = 0;
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while (dataProvider.remaining_bytes() > 0 && opsRun++ < MAX_OPERATIONS) {
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uint32_t bit = dataProvider.ConsumeIntegral<uint32_t>();
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uint8_t op = dataProvider.ConsumeIntegral<uint8_t>();
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thirtyTwoBitOps[op % thirtyTwoBitOps.size()](b1, bit);
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sixtyFourBitOps[op % sixtyFourBitOps.size()](b2, bit);
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}
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return 0;
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}
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