forked from OSchip/llvm-project
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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// Simple test for a cutom crossover.
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#include <assert.h>
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#include <cstddef>
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#include <cstdint>
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#include <cstdlib>
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#include <iostream>
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#include <ostream>
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#include <random>
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#include <string.h>
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#include <functional>
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static const char *Separator = "-########-";
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static const char *Target = "A-########-B";
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static volatile int sink;
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
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assert(Data);
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std::string Str(reinterpret_cast<const char *>(Data), Size);
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static const size_t TargetHash = std::hash<std::string>{}(std::string(Target));
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size_t StrHash = std::hash<std::string>{}(Str);
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// Ensure we have 'A' and 'B' in the corpus.
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if (Size == 1 && *Data == 'A')
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sink++;
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if (Size == 1 && *Data == 'B')
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sink--;
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if (TargetHash == StrHash) {
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std::cout << "BINGO; Found the target, exiting\n" << std::flush;
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exit(1);
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}
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return 0;
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}
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extern "C" size_t LLVMFuzzerCustomCrossOver(const uint8_t *Data1, size_t Size1,
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const uint8_t *Data2, size_t Size2,
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uint8_t *Out, size_t MaxOutSize,
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unsigned int Seed) {
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static size_t Printed;
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static size_t SeparatorLen = strlen(Separator);
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if (Printed++ < 32)
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std::cerr << "In LLVMFuzzerCustomCrossover " << Size1 << " " << Size2 << "\n";
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size_t Size = Size1 + Size2 + SeparatorLen;
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if (Size > MaxOutSize)
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return 0;
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memcpy(Out, Data1, Size1);
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memcpy(Out + Size1, Separator, SeparatorLen);
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memcpy(Out + Size1 + SeparatorLen, Data2, Size2);
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return Size;
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}
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