1 //===- FuzzerDefs.h - Internal header for the Fuzzer ------------*- C++ -* ===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // Basic definitions. 10 //===----------------------------------------------------------------------===// 11 12 #ifndef LLVM_FUZZER_DEFS_H 13 #define LLVM_FUZZER_DEFS_H 14 15 #include <cassert> 16 #include <cstddef> 17 #include <cstdint> 18 #include <cstring> 19 #include <string> 20 #include <vector> 21 #include <set> 22 #include <memory> 23 24 // Platform detection. 25 #ifdef __linux__ 26 #define LIBFUZZER_APPLE 0 27 #define LIBFUZZER_FUCHSIA 0 28 #define LIBFUZZER_LINUX 1 29 #define LIBFUZZER_NETBSD 0 30 #define LIBFUZZER_FREEBSD 0 31 #define LIBFUZZER_OPENBSD 0 32 #define LIBFUZZER_WINDOWS 0 33 #elif __APPLE__ 34 #define LIBFUZZER_APPLE 1 35 #define LIBFUZZER_FUCHSIA 0 36 #define LIBFUZZER_LINUX 0 37 #define LIBFUZZER_NETBSD 0 38 #define LIBFUZZER_FREEBSD 0 39 #define LIBFUZZER_OPENBSD 0 40 #define LIBFUZZER_WINDOWS 0 41 #elif __NetBSD__ 42 #define LIBFUZZER_APPLE 0 43 #define LIBFUZZER_FUCHSIA 0 44 #define LIBFUZZER_LINUX 0 45 #define LIBFUZZER_NETBSD 1 46 #define LIBFUZZER_FREEBSD 0 47 #define LIBFUZZER_OPENBSD 0 48 #define LIBFUZZER_WINDOWS 0 49 #elif __FreeBSD__ 50 #define LIBFUZZER_APPLE 0 51 #define LIBFUZZER_FUCHSIA 0 52 #define LIBFUZZER_LINUX 0 53 #define LIBFUZZER_NETBSD 0 54 #define LIBFUZZER_FREEBSD 1 55 #define LIBFUZZER_OPENBSD 0 56 #define LIBFUZZER_WINDOWS 0 57 #elif __OpenBSD__ 58 #define LIBFUZZER_APPLE 0 59 #define LIBFUZZER_FUCHSIA 0 60 #define LIBFUZZER_LINUX 0 61 #define LIBFUZZER_NETBSD 0 62 #define LIBFUZZER_FREEBSD 0 63 #define LIBFUZZER_OPENBSD 1 64 #define LIBFUZZER_WINDOWS 0 65 #elif _WIN32 66 #define LIBFUZZER_APPLE 0 67 #define LIBFUZZER_FUCHSIA 0 68 #define LIBFUZZER_LINUX 0 69 #define LIBFUZZER_NETBSD 0 70 #define LIBFUZZER_FREEBSD 0 71 #define LIBFUZZER_OPENBSD 0 72 #define LIBFUZZER_WINDOWS 1 73 #elif __Fuchsia__ 74 #define LIBFUZZER_APPLE 0 75 #define LIBFUZZER_FUCHSIA 1 76 #define LIBFUZZER_LINUX 0 77 #define LIBFUZZER_NETBSD 0 78 #define LIBFUZZER_FREEBSD 0 79 #define LIBFUZZER_OPENBSD 0 80 #define LIBFUZZER_WINDOWS 0 81 #else 82 #error "Support for your platform has not been implemented" 83 #endif 84 85 #ifndef __has_attribute 86 # define __has_attribute(x) 0 87 #endif 88 89 #define LIBFUZZER_POSIX \ 90 (LIBFUZZER_APPLE || LIBFUZZER_LINUX || LIBFUZZER_NETBSD || \ 91 LIBFUZZER_FREEBSD || LIBFUZZER_OPENBSD) 92 93 #ifdef __x86_64 94 # if __has_attribute(target) 95 # define ATTRIBUTE_TARGET_POPCNT __attribute__((target("popcnt"))) 96 # else 97 # define ATTRIBUTE_TARGET_POPCNT 98 # endif 99 #else 100 # define ATTRIBUTE_TARGET_POPCNT 101 #endif 102 103 104 #ifdef __clang__ // avoid gcc warning. 105 # if __has_attribute(no_sanitize) 106 # define ATTRIBUTE_NO_SANITIZE_MEMORY __attribute__((no_sanitize("memory"))) 107 # else 108 # define ATTRIBUTE_NO_SANITIZE_MEMORY 109 # endif 110 # define ALWAYS_INLINE __attribute__((always_inline)) 111 #else 112 # define ATTRIBUTE_NO_SANITIZE_MEMORY 113 # define ALWAYS_INLINE 114 #endif // __clang__ 115 116 #define ATTRIBUTE_NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address)) 117 118 #if defined(__has_feature) 119 # if __has_feature(address_sanitizer) 120 # define ATTRIBUTE_NO_SANITIZE_ALL ATTRIBUTE_NO_SANITIZE_ADDRESS 121 # elif __has_feature(memory_sanitizer) 122 # define ATTRIBUTE_NO_SANITIZE_ALL ATTRIBUTE_NO_SANITIZE_MEMORY 123 # else 124 # define ATTRIBUTE_NO_SANITIZE_ALL 125 # endif 126 #else 127 # define ATTRIBUTE_NO_SANITIZE_ALL 128 #endif 129 130 #if LIBFUZZER_WINDOWS 131 #define ATTRIBUTE_INTERFACE __declspec(dllexport) 132 // This is used for __sancov_lowest_stack which is needed for 133 // -fsanitize-coverage=stack-depth. That feature is not yet available on 134 // Windows, so make the symbol static to avoid linking errors. 135 #define ATTRIBUTES_INTERFACE_TLS_INITIAL_EXEC \ 136 __attribute__((tls_model("initial-exec"))) thread_local static 137 #else 138 #define ATTRIBUTE_INTERFACE __attribute__((visibility("default"))) 139 #define ATTRIBUTES_INTERFACE_TLS_INITIAL_EXEC \ 140 ATTRIBUTE_INTERFACE __attribute__((tls_model("initial-exec"))) thread_local 141 #endif 142 143 namespace fuzzer { 144 145 template <class T> T Min(T a, T b) { return a < b ? a : b; } 146 template <class T> T Max(T a, T b) { return a > b ? a : b; } 147 148 class Random; 149 class Dictionary; 150 class DictionaryEntry; 151 class MutationDispatcher; 152 struct FuzzingOptions; 153 class InputCorpus; 154 struct InputInfo; 155 struct ExternalFunctions; 156 157 // Global interface to functions that may or may not be available. 158 extern ExternalFunctions *EF; 159 160 // We are using a custom allocator to give a different symbol name to STL 161 // containers in order to avoid ODR violations. 162 template<typename T> 163 class fuzzer_allocator: public std::allocator<T> { 164 public: 165 fuzzer_allocator() = default; 166 167 template<class U> 168 fuzzer_allocator(const fuzzer_allocator<U>&) {} 169 170 template<class Other> 171 struct rebind { typedef fuzzer_allocator<Other> other; }; 172 }; 173 174 template<typename T> 175 using Vector = std::vector<T, fuzzer_allocator<T>>; 176 177 template<typename T> 178 using Set = std::set<T, std::less<T>, fuzzer_allocator<T>>; 179 180 typedef Vector<uint8_t> Unit; 181 typedef Vector<Unit> UnitVector; 182 typedef int (*UserCallback)(const uint8_t *Data, size_t Size); 183 184 int FuzzerDriver(int *argc, char ***argv, UserCallback Callback); 185 186 inline uint8_t Bswap(uint8_t x) { return x; } 187 inline uint16_t Bswap(uint16_t x) { return __builtin_bswap16(x); } 188 inline uint32_t Bswap(uint32_t x) { return __builtin_bswap32(x); } 189 inline uint64_t Bswap(uint64_t x) { return __builtin_bswap64(x); } 190 191 uint8_t *ExtraCountersBegin(); 192 uint8_t *ExtraCountersEnd(); 193 void ClearExtraCounters(); 194 195 extern bool RunningUserCallback; 196 197 } // namespace fuzzer 198 199 #endif // LLVM_FUZZER_DEFS_H 200
Indexes created Sat Sep 20 22:09:52 GMT 2025