| 1 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 2 | // See https://llvm.org/LICENSE.txt for license information. |
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| 3 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 4 | |
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| 5 | // Test that libFuzzer does not crash when LLVMFuzzerMutate called from |
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| 6 | // LLVMFuzzerCustomCrossOver. |
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| 7 | #include <algorithm> |
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| 8 | #include <cstddef> |
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| 9 | #include <cstdint> |
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| 10 | #include <cstdlib> |
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| 11 | #include <string.h> |
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| 12 | #include <string> |
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| 13 | #include <vector> |
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| 14 | |
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| 15 | #include "FuzzerInterface.h" |
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| 16 | |
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| 17 | static volatile int sink; |
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| 18 | |
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| 19 | extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { |
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| 20 | std::string Str(reinterpret_cast<const char *>(Data), Size); |
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| 21 | if (Size && Data[0] == '0') |
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| 22 | sink++; |
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| 23 | return 0; |
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| 24 | } |
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| 25 | |
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| 26 | extern "C" size_t LLVMFuzzerCustomCrossOver(const uint8_t *Data1, size_t Size1, |
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| 27 | const uint8_t *Data2, size_t Size2, |
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| 28 | uint8_t *Out, size_t MaxOutSize, |
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| 29 | unsigned int Seed) { |
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| 30 | std::vector<uint8_t> Buffer(MaxOutSize * 10); |
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| 31 | LLVMFuzzerMutate(Data: Buffer.data(), Size: Buffer.size(), MaxSize: Buffer.size()); |
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| 32 | size_t Size = std::min(a: Size1, b: MaxOutSize); |
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| 33 | memcpy(dest: Out, src: Data1, n: Size); |
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| 34 | return Size; |
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| 35 | } |
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| 36 | |
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