37 lines · cpp
1// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.2// See https://llvm.org/LICENSE.txt for license information.3// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception4 5// Simple test for a fuzzer. The fuzzer must find the interesting switch value.6#include <cstddef>7#include <cstdint>8#include <cstdio>9#include <cstdlib>10#include <cstring>11 12int Switch(int a) {13 switch(a) {14 case 100001: return 1;15 case 100002: return 2;16 case 100003: return 4;17 }18 return 0;19}20 21extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {22 const int N = 3;23 if (Size < N * sizeof(int)) return 0;24 int Res = 0;25 for (int i = 0; i < N; i++) {26 int X;27 memcpy(&X, Data + i * sizeof(int), sizeof(int));28 Res += Switch(X);29 }30 if (Res == 5 || Res == 3 || Res == 6 || Res == 7) {31 fprintf(stderr, "BINGO; Found the target, exiting; Res=%d\n", Res);32 exit(1);33 }34 return 0;35}36 37