1 // Copyright (c) 2020 The Bitcoin Core developers 2 // Distributed under the MIT software license, see the accompanying 3 // file COPYING or http://www.opensource.org/licenses/mit-license.php. 4 5 #include <test/fuzz/FuzzedDataProvider.h> 6 #include <test/fuzz/fuzz.h> 7 #include <test/fuzz/util.h> 8 #include <timedata.h> 9 10 #include <cstdint> 11 #include <string> 12 #include <vector> 13 FUZZ_TARGET(timedata)14FUZZ_TARGET(timedata) 15 { 16 FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size()); 17 const unsigned int max_size = fuzzed_data_provider.ConsumeIntegralInRange<unsigned int>(0, 1000); 18 // A max_size of 0 implies no limit, so cap the max number of insertions to avoid timeouts 19 auto max_to_insert = fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 4000); 20 // Divide by 2 to avoid signed integer overflow in .median() 21 const int64_t initial_value = fuzzed_data_provider.ConsumeIntegral<int64_t>() / 2; 22 CMedianFilter<int64_t> median_filter{max_size, initial_value}; 23 while (fuzzed_data_provider.remaining_bytes() > 0 && --max_to_insert >= 0) { 24 (void)median_filter.median(); 25 assert(median_filter.size() > 0); 26 assert(static_cast<size_t>(median_filter.size()) == median_filter.sorted().size()); 27 assert(static_cast<unsigned int>(median_filter.size()) <= max_size || max_size == 0); 28 // Divide by 2 to avoid signed integer overflow in .median() 29 median_filter.input(fuzzed_data_provider.ConsumeIntegral<int64_t>() / 2); 30 } 31 } 32