38 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// A fuzz target with lots of edges.6#include <cstdint>7#include <cstdlib>8 9static inline void break_optimization(const void *arg) {10 __asm__ __volatile__("" : : "r" (arg) : "memory");11}12 13#define A \14 do { \15 i++; \16 c++; \17 if (Data[(i + __LINE__) % Size] == (c % 256)) \18 break_optimization(Data); \19 else \20 break_optimization(0); \21 } while (0)22 23// for (int i = 0, n = Data[(__LINE__ - 1) % Size] % 16; i < n; i++)24 25#define B do{A; A; A; A; A; A; A; A; A; A; A; A; A; A; A; A; A; A; }while(0)26#define C do{B; B; B; B; B; B; B; B; B; B; B; B; B; B; B; B; B; B; }while(0)27#define D do{C; C; C; C; C; C; C; C; C; }while(0)28 29volatile int sink;30extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {31 if (!Size) return 0;32 int c = 0;33 int i = 0;34 D;35 return 0;36}37 38