LCOV - code coverage report
Current view: top level - src/test/fuzz - fuzz.h (source / functions) Coverage Total Hit
Test: fuzz_coverage.info Lines: 100.0 % 1 1
Test Date: 2024-12-04 04:00:22 Functions: - 0 0
Branches: 50.0 % 2 1

             Branch data     Line data    Source code
       1                 :             : // Copyright (c) 2009-2021 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                 :             : #ifndef BITCOIN_TEST_FUZZ_FUZZ_H
       6                 :             : #define BITCOIN_TEST_FUZZ_FUZZ_H
       7                 :             : 
       8                 :             : #include <cstdint>
       9                 :             : #include <functional>
      10                 :             : #include <span>
      11                 :             : #include <string_view>
      12                 :             : 
      13                 :             : /**
      14                 :             :  * Can be used to limit a theoretically unbounded loop. This caps the runtime
      15                 :             :  * to avoid timeouts or OOMs.
      16                 :             :  *
      17                 :             :  * This can be used in combination with a check in the condition to confirm
      18                 :             :  * whether the fuzz engine provided "good" data. If the fuzz input contains
      19                 :             :  * invalid data, the loop aborts early. This will teach the fuzz engine to look
      20                 :             :  * for useful data and avoids bloating the fuzz input folder with useless data.
      21                 :             :  */
      22                 :             : #define LIMITED_WHILE(condition, limit) \
      23                 :             :     for (unsigned _count{limit}; (condition) && _count; --_count)
      24                 :             : 
      25                 :             : using FuzzBufferType = std::span<const uint8_t>;
      26                 :             : 
      27                 :             : using TypeTestOneInput = std::function<void(FuzzBufferType)>;
      28         [ +  - ]:      127926 : struct FuzzTargetOptions {
      29                 :             :     std::function<void()> init{[] {}};
      30                 :             :     bool hidden{false};
      31                 :             : };
      32                 :             : 
      33                 :             : void FuzzFrameworkRegisterTarget(std::string_view name, TypeTestOneInput target, FuzzTargetOptions opts);
      34                 :             : 
      35                 :             : #define FUZZ_TARGET(...) DETAIL_FUZZ(__VA_ARGS__)
      36                 :             : 
      37                 :             : #define DETAIL_FUZZ(name, ...)                                                        \
      38                 :             :     void name##_fuzz_target(FuzzBufferType);                                          \
      39                 :             :     struct name##_Before_Main {                                                       \
      40                 :             :         name##_Before_Main()                                                          \
      41                 :             :         {                                                                             \
      42                 :             :             FuzzFrameworkRegisterTarget(#name, name##_fuzz_target, {__VA_ARGS__});    \
      43                 :             :         }                                                                             \
      44                 :             :     } const static g_##name##_before_main;                                            \
      45                 :             :     void name##_fuzz_target(FuzzBufferType buffer)
      46                 :             : 
      47                 :             : #endif // BITCOIN_TEST_FUZZ_FUZZ_H
        

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