1 //===- FuzzerUtil.h - Internal header for the Fuzzer Utils ------*- C++ -* ===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // Util functions. 9 //===----------------------------------------------------------------------===// 10 11 #ifndef LLVM_FUZZER_UTIL_H 12 #define LLVM_FUZZER_UTIL_H 13 14 #include "FuzzerBuiltins.h" 15 #include "FuzzerBuiltinsMsvc.h" 16 #include "FuzzerCommand.h" 17 #include "FuzzerDefs.h" 18 19 namespace fuzzer { 20 21 void PrintHexArray(const Unit &U, const char *PrintAfter = ""); 22 23 void PrintHexArray(const uint8_t *Data, size_t Size, 24 const char *PrintAfter = ""); 25 26 void PrintASCII(const uint8_t *Data, size_t Size, const char *PrintAfter = ""); 27 28 void PrintASCII(const Unit &U, const char *PrintAfter = ""); 29 30 // Changes U to contain only ASCII (isprint+isspace) characters. 31 // Returns true iff U has been changed. 32 bool ToASCII(uint8_t *Data, size_t Size); 33 34 bool IsASCII(const Unit &U); 35 36 bool IsASCII(const uint8_t *Data, size_t Size); 37 38 std::string Base64(const Unit &U); 39 40 void PrintPC(const char *SymbolizedFMT, const char *FallbackFMT, uintptr_t PC); 41 42 std::string DescribePC(const char *SymbolizedFMT, uintptr_t PC); 43 44 void PrintStackTrace(); 45 46 void PrintMemoryProfile(); 47 48 unsigned NumberOfCpuCores(); 49 50 // Platform specific functions. 51 void SetSignalHandler(const FuzzingOptions& Options); 52 53 void SleepSeconds(int Seconds); 54 55 unsigned long GetPid(); 56 57 size_t GetPeakRSSMb(); 58 59 int ExecuteCommand(const Command &Cmd); 60 61 FILE *OpenProcessPipe(const char *Command, const char *Mode); 62 63 const void *SearchMemory(const void *haystack, size_t haystacklen, 64 const void *needle, size_t needlelen); 65 66 std::string CloneArgsWithoutX(const Vector<std::string> &Args, 67 const char *X1, const char *X2); 68 69 inline std::string CloneArgsWithoutX(const Vector<std::string> &Args, 70 const char *X) { 71 return CloneArgsWithoutX(Args, X, X); 72 } 73 74 inline std::pair<std::string, std::string> SplitBefore(std::string X, 75 std::string S) { 76 auto Pos = S.find(X); 77 if (Pos == std::string::npos) 78 return std::make_pair(S, ""); 79 return std::make_pair(S.substr(0, Pos), S.substr(Pos)); 80 } 81 82 void DiscardOutput(int Fd); 83 84 std::string DisassembleCmd(const std::string &FileName); 85 86 std::string SearchRegexCmd(const std::string &Regex); 87 88 size_t SimpleFastHash(const uint8_t *Data, size_t Size); 89 90 inline uint32_t Log(uint32_t X) { return 32 - Clz(X) - 1; } 91 92 inline size_t PageSize() { return 4096; } 93 inline uint8_t *RoundUpByPage(uint8_t *P) { 94 uintptr_t X = reinterpret_cast<uintptr_t>(P); 95 size_t Mask = PageSize() - 1; 96 X = (X + Mask) & ~Mask; 97 return reinterpret_cast<uint8_t *>(X); 98 } 99 inline uint8_t *RoundDownByPage(uint8_t *P) { 100 uintptr_t X = reinterpret_cast<uintptr_t>(P); 101 size_t Mask = PageSize() - 1; 102 X = X & ~Mask; 103 return reinterpret_cast<uint8_t *>(X); 104 } 105 106 } // namespace fuzzer 107 108 #endif // LLVM_FUZZER_UTIL_H 109