forked from OSchip/llvm-project
48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
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// 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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// Triggers the bug described here:
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// https://github.com/google/oss-fuzz/issues/4605
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//
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// Tests that custom mutators do not cause MSan false positives. We are careful
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// to use every parameter to ensure none cause false positives.
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#include <algorithm>
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#include <cstddef>
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#include <cstdint>
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#include <cstdio>
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#include <cstring>
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extern "C" {
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int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { return 0; }
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size_t LLVMFuzzerCustomMutator(uint8_t *Data, size_t Size, size_t MaxSize,
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unsigned int Seed) {
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if (Seed == 7)
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return 0;
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if (MaxSize == 0)
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return 0;
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for (size_t I = 0; I < Size; ++I) {
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if (Data[I] == 42) {
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printf("BINGO\n");
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}
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}
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return Size;
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}
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size_t LLVMFuzzerCustomCrossOver(
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const uint8_t *Data1, size_t Size1, const uint8_t *Data2, size_t Size2,
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uint8_t *Out, size_t MaxOutSize, unsigned int Seed) {
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if (Seed == 7)
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return 0;
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size_t I = 0;
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for (; I < Size1 && I < Size2 && I < MaxOutSize; ++I) {
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Out[I] = std::min(Data1[I], Data2[I]);
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}
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return I;
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}
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} // extern "C"
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