Line data    Source code

       1             : // Copyright (c) 2020-2021 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             : 
      14           4 : FUZZ_TARGET(timedata)
      15             : {
      16           0 :     FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
      17           0 :     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           0 :     auto max_to_insert = fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 4000);
      20             :     // Divide by 2 to avoid signed integer overflow in .median()
      21           0 :     const int64_t initial_value = fuzzed_data_provider.ConsumeIntegral<int64_t>() / 2;
      22           0 :     CMedianFilter<int64_t> median_filter{max_size, initial_value};
      23           0 :     while (fuzzed_data_provider.remaining_bytes() > 0 && --max_to_insert >= 0) {
      24           0 :         (void)median_filter.median();
      25           2 :         assert(median_filter.size() > 0);
      26           0 :         assert(static_cast<size_t>(median_filter.size()) == median_filter.sorted().size());
      27           0 :         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           0 :         median_filter.input(fuzzed_data_provider.ConsumeIntegral<int64_t>() / 2);
      30             :     }
      31           0 : }