LCOV - code coverage report
Current view: top level - src/test/fuzz - multiplication_overflow.cpp (source / functions) Hit Total Coverage
Test: fuzz_coverage.info Lines: 2 23 8.7 %
Date: 2024-01-03 14:57:27 Functions: 1 12 8.3 %
Branches: 2 58 3.4 %

           Branch data     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                 :            : #if defined(HAVE_CONFIG_H)
       6                 :            : #include <config/bitcoin-config.h>
       7                 :            : #endif
       8                 :            : 
       9                 :            : #include <test/fuzz/FuzzedDataProvider.h>
      10                 :            : #include <test/fuzz/fuzz.h>
      11                 :            : #include <test/fuzz/util.h>
      12                 :            : 
      13                 :            : #include <cstdint>
      14                 :            : #include <string>
      15                 :            : #include <vector>
      16                 :            : 
      17                 :            : namespace {
      18                 :            : template <typename T>
      19                 :          0 : void TestMultiplicationOverflow(FuzzedDataProvider& fuzzed_data_provider)
      20                 :            : {
      21                 :          0 :     const T i = fuzzed_data_provider.ConsumeIntegral<T>();
      22                 :          0 :     const T j = fuzzed_data_provider.ConsumeIntegral<T>();
      23                 :          0 :     const bool is_multiplication_overflow_custom = MultiplicationOverflow(i, j);
      24                 :            : #if defined(HAVE_BUILTIN_MUL_OVERFLOW)
      25                 :            :     T result_builtin;
      26                 :          0 :     const bool is_multiplication_overflow_builtin = __builtin_mul_overflow(i, j, &result_builtin);
      27 [ #  # ][ #  # ]:          0 :     assert(is_multiplication_overflow_custom == is_multiplication_overflow_builtin);
         [ #  # ][ #  # ]
         [ #  # ][ #  # ]
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                 [ #  # ]
      28 [ #  # ][ #  # ]:          0 :     if (!is_multiplication_overflow_custom) {
         [ #  # ][ #  # ]
         [ #  # ][ #  # ]
         [ #  # ][ #  # ]
                 [ #  # ]
      29 [ #  # ][ #  # ]:          0 :         assert(i * j == result_builtin);
         [ #  # ][ #  # ]
         [ #  # ][ #  # ]
         [ #  # ][ #  # ]
                 [ #  # ]
      30                 :          2 :     }
      31                 :            : #else
      32                 :            :     if (!is_multiplication_overflow_custom) {
      33                 :            :         (void)(i * j);
      34                 :            :     }
      35                 :            : #endif
      36                 :          0 : }
      37                 :            : } // namespace
      38                 :            : 
      39 [ +  - ][ +  - ]:          6 : FUZZ_TARGET(multiplication_overflow)
      40                 :            : {
      41                 :          0 :     FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
      42                 :          0 :     TestMultiplicationOverflow<int64_t>(fuzzed_data_provider);
      43                 :          0 :     TestMultiplicationOverflow<uint64_t>(fuzzed_data_provider);
      44                 :          0 :     TestMultiplicationOverflow<int32_t>(fuzzed_data_provider);
      45                 :          0 :     TestMultiplicationOverflow<uint32_t>(fuzzed_data_provider);
      46                 :          0 :     TestMultiplicationOverflow<int16_t>(fuzzed_data_provider);
      47                 :          0 :     TestMultiplicationOverflow<uint16_t>(fuzzed_data_provider);
      48                 :          0 :     TestMultiplicationOverflow<char>(fuzzed_data_provider);
      49                 :          0 :     TestMultiplicationOverflow<unsigned char>(fuzzed_data_provider);
      50                 :          0 :     TestMultiplicationOverflow<signed char>(fuzzed_data_provider);
      51                 :          0 : }

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