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