1  // Copyright (c) 2020-present 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 <cuckoocache.h>
 6  #include <script/sigcache.h>
 7  #include <test/fuzz/FuzzedDataProvider.h>
 8  #include <test/fuzz/fuzz.h>
 9  #include <test/fuzz/util.h>
10  #include <test/util/setup_common.h>
11  #include <util/byte_units.h>
12  
13  #include <cstdint>
14  #include <string>
15  #include <vector>
16  
17  namespace {
18  FuzzedDataProvider* fuzzed_data_provider_ptr = nullptr;
19  
20  struct RandomHasher {
21      template <uint8_t>
22      uint32_t operator()(const bool& /* unused */) const
23      {
24          assert(fuzzed_data_provider_ptr != nullptr);
25          return fuzzed_data_provider_ptr->ConsumeIntegral<uint32_t>();
26      }
27  };
28  } // namespace
29  
30  FUZZ_TARGET(cuckoocache)
31  {
32      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
33      fuzzed_data_provider_ptr = &fuzzed_data_provider;
34      CuckooCache::cache<int, RandomHasher> cuckoo_cache{};
35      if (fuzzed_data_provider.ConsumeBool()) {
36          const size_t megabytes = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 16);
37          cuckoo_cache.setup_bytes(megabytes * 1_MiB);
38      } else {
39          cuckoo_cache.setup(fuzzed_data_provider.ConsumeIntegralInRange<uint32_t>(0, 4096));
40      }
41      LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
42          if (fuzzed_data_provider.ConsumeBool()) {
43              cuckoo_cache.insert(fuzzed_data_provider.ConsumeBool());
44          } else {
45              auto e = fuzzed_data_provider.ConsumeBool();
46              auto erase = fuzzed_data_provider.ConsumeBool();
47              cuckoo_cache.contains(e, erase);
48          }
49      }
50      fuzzed_data_provider_ptr = nullptr;
51  }