12946cd70SChandler Carruth // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 22946cd70SChandler Carruth // See https://llvm.org/LICENSE.txt for license information. 32946cd70SChandler Carruth // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 410ab2aceSGeorge Karpenkov 510ab2aceSGeorge Karpenkov // Simple test for a fuzzer: find interesting value of array index. 610ab2aceSGeorge Karpenkov #include <assert.h> 710ab2aceSGeorge Karpenkov #include <cstddef> 810ab2aceSGeorge Karpenkov #include <cstdint> 910ab2aceSGeorge Karpenkov #include <cstring> 1010ab2aceSGeorge Karpenkov #include <iostream> 1110ab2aceSGeorge Karpenkov 12*52f1df09SDokyung Song static volatile uint8_t Sink; 13*52f1df09SDokyung Song const int kArraySize = 32505854; // 0x01effffe 14*52f1df09SDokyung Song uint8_t array[kArraySize]; 1510ab2aceSGeorge Karpenkov LLVMFuzzerTestOneInput(const uint8_t * Data,size_t Size)1610ab2aceSGeorge Karpenkovextern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { 17*52f1df09SDokyung Song if (Size != 8) 18*52f1df09SDokyung Song return 0; 1910ab2aceSGeorge Karpenkov uint64_t a = 0; 20*52f1df09SDokyung Song memcpy(&a, Data, sizeof(a)); 21*52f1df09SDokyung Song a &= 0x1fffffff; 2210ab2aceSGeorge Karpenkov Sink = array[a % (kArraySize + 1)]; 2310ab2aceSGeorge Karpenkov return 0; 2410ab2aceSGeorge Karpenkov } 25