64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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// Simple test for a cutom mutator.
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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 <random>
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#include <string.h>
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#include "FuzzerInterface.h"
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static const char *Separator = "-_^_-";
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static const char *Target = "012-_^_-abc";
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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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// Ensure that two different elements exist in the corpus.
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if (Size && Data[0] == '0') sink++;
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if (Size && Data[0] == 'a') sink--;
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if (Str.find(Target) != std::string::npos) {
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std::cout << "BINGO; Found the target, exiting\n";
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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 bool Printed;
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static size_t SeparatorLen = strlen(Separator);
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if (!Printed) {
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std::cerr << "In LLVMFuzzerCustomCrossover\n";
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Printed = true;
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}
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std::mt19937 R(Seed);
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size_t Offset1 = 0;
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size_t Len1 = R() % (Size1 - Offset1);
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size_t Offset2 = 0;
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size_t Len2 = R() % (Size2 - Offset2);
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size_t Size = Len1 + Len2 + SeparatorLen;
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if (Size > MaxOutSize)
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return 0;
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memcpy(Out, Data1 + Offset1, Len1);
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memcpy(Out + Len1, Separator, SeparatorLen);
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memcpy(Out + Len1 + SeparatorLen, Data2 + Offset2, Len2);
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return Len1 + Len2 + SeparatorLen;
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}
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