mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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#include <test/tools/ossfuzz/SolidityCustomMutatorInterface.h>
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#include <test/tools/ossfuzz/SolidityGenerator.h>
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#include <liblangutil/Exceptions.h>
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using namespace std;
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using namespace solidity::test::fuzzer;
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namespace
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{
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/// Forward declare libFuzzer's default mutator definition
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extern "C" size_t LLVMFuzzerMutate(uint8_t* _data, size_t _size, size_t _maxSize);
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/// Define Solidity's custom mutator by implementing libFuzzer's
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/// custom mutator external interface.
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extern "C" size_t LLVMFuzzerCustomMutator(
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uint8_t* _data,
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size_t _size,
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size_t _maxSize,
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unsigned int _seed
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)
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{
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if (_maxSize <= _size || _size == 0)
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return LLVMFuzzerMutate(_data, _size, _maxSize);
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return SolidityCustomMutatorInterface{_data, _size, _maxSize, _seed}.generate();
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}
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}
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SolidityCustomMutatorInterface::SolidityCustomMutatorInterface(
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uint8_t* _data,
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size_t _size,
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size_t _maxSize,
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unsigned int _seed
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):
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data(_data),
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size(_size),
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maxMutantSize(_maxSize),
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generator(make_shared<SolidityGenerator>(_seed))
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{}
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size_t SolidityCustomMutatorInterface::generate()
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{
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string testCase = generator->generateTestProgram();
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solAssert(
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!testCase.empty() && data,
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"Solc custom mutator: Invalid mutant or memory pointer"
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);
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size_t mutantSize = min(testCase.size(), maxMutantSize - 1);
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mempcpy(data, testCase.data(), mutantSize);
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return mutantSize;
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}
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