1*2946cd70SChandler Carruth // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 2*2946cd70SChandler Carruth // See https://llvm.org/LICENSE.txt for license information. 3*2946cd70SChandler Carruth // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 410ab2aceSGeorge Karpenkov 510ab2aceSGeorge Karpenkov // Simple test for a fuzzer. The fuzzer must find the interesting switch value. 610ab2aceSGeorge Karpenkov #include <cstddef> 710ab2aceSGeorge Karpenkov #include <cstdint> 810ab2aceSGeorge Karpenkov #include <cstdio> 910ab2aceSGeorge Karpenkov #include <cstdlib> 1010ab2aceSGeorge Karpenkov #include <cstring> 1110ab2aceSGeorge Karpenkov Switch(int a)1210ab2aceSGeorge Karpenkovint Switch(int a) { 1310ab2aceSGeorge Karpenkov switch(a) { 1410ab2aceSGeorge Karpenkov case 100001: return 1; 1510ab2aceSGeorge Karpenkov case 100002: return 2; 1610ab2aceSGeorge Karpenkov case 100003: return 4; 1710ab2aceSGeorge Karpenkov } 1810ab2aceSGeorge Karpenkov return 0; 1910ab2aceSGeorge Karpenkov } 2010ab2aceSGeorge Karpenkov LLVMFuzzerTestOneInput(const uint8_t * Data,size_t Size)2110ab2aceSGeorge Karpenkovextern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { 2210ab2aceSGeorge Karpenkov const int N = 3; 2310ab2aceSGeorge Karpenkov if (Size < N * sizeof(int)) return 0; 2410ab2aceSGeorge Karpenkov int Res = 0; 2510ab2aceSGeorge Karpenkov for (int i = 0; i < N; i++) { 2610ab2aceSGeorge Karpenkov int X; 2710ab2aceSGeorge Karpenkov memcpy(&X, Data + i * sizeof(int), sizeof(int)); 2810ab2aceSGeorge Karpenkov Res += Switch(X); 2910ab2aceSGeorge Karpenkov } 3010ab2aceSGeorge Karpenkov if (Res == 5 || Res == 3 || Res == 6 || Res == 7) { 3110ab2aceSGeorge Karpenkov fprintf(stderr, "BINGO; Found the target, exiting; Res=%d\n", Res); 3210ab2aceSGeorge Karpenkov exit(1); 3310ab2aceSGeorge Karpenkov } 3410ab2aceSGeorge Karpenkov return 0; 3510ab2aceSGeorge Karpenkov } 3610ab2aceSGeorge Karpenkov 37