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-exception 4 5 #include <cstddef> 6 #include <cstdint> 7 #include <cstdio> 8 #include <cstdlib> 9 #include <cstring> 10 11 #include "FuzzerIO.h" 12 LLVMFuzzerTestOneInput(const uint8_t * Data,size_t Size)13extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { 14 const char *FileName = "big-file.txt"; 15 FILE *f = fopen(FileName, "w"); 16 17 // This is the biggest file possible unless CopyFileToErr() uses Puts() 18 fprintf(f, "%2147483646s", "2Gb-2"); 19 20 // This makes the file too big if CopyFileToErr() uses fprintf("%s", <file>) 21 fprintf(f, "THIS LINE RESPONSIBLE FOR EXCEEDING 2Gb FILE SIZE\n"); 22 fclose(f); 23 24 // Should now because CopyFileToErr() now uses Puts() 25 fuzzer::CopyFileToErr(FileName); 26 27 // File is >2Gb so clean up 28 remove(FileName); 29 30 return 0; 31 } 32