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//===- FuzzerUtil.h - Internal header for the Fuzzer Utils ------*- C++ -* ===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Util functions.
//===----------------------------------------------------------------------===//
#ifndef LLVM_FUZZER_UTIL_H
#define LLVM_FUZZER_UTIL_H
#include "FuzzerBuiltins.h"
#include "FuzzerBuiltinsMsvc.h"
#include "FuzzerCommand.h"
#include "FuzzerDefs.h"
namespace fuzzer {
void PrintHexArray(const Unit &U, const char *PrintAfter = "");
void PrintHexArray(const uint8_t *Data, size_t Size,
const char *PrintAfter = "");
void PrintASCII(const uint8_t *Data, size_t Size, const char *PrintAfter = "");
void PrintASCII(const Unit &U, const char *PrintAfter = "");
// Changes U to contain only ASCII (isprint+isspace) characters.
// Returns true iff U has been changed.
bool ToASCII(uint8_t *Data, size_t Size);
bool IsASCII(const Unit &U);
bool IsASCII(const uint8_t *Data, size_t Size);
std::string Base64(const Unit &U);
void PrintPC(const char *SymbolizedFMT, const char *FallbackFMT, uintptr_t PC);
std::string DescribePC(const char *SymbolizedFMT, uintptr_t PC);
void PrintStackTrace();
void PrintMemoryProfile();
unsigned NumberOfCpuCores();
// Platform specific functions.
void SetSignalHandler(const FuzzingOptions& Options);
void SleepSeconds(int Seconds);
unsigned long GetPid();
size_t GetPeakRSSMb();
int ExecuteCommand(const Command &Cmd);
bool ExecuteCommand(const Command &Cmd, std::string *CmdOutput);
// Fuchsia does not have popen/pclose.
FILE *OpenProcessPipe(const char *Command, const char *Mode);
int CloseProcessPipe(FILE *F);
const void *SearchMemory(const void *haystack, size_t haystacklen,
const void *needle, size_t needlelen);
std::string CloneArgsWithoutX(const std::vector<std::string> &Args,
const char *X1, const char *X2);
inline std::string CloneArgsWithoutX(const std::vector<std::string> &Args,
const char *X) {
return CloneArgsWithoutX(Args, X, X);
}
inline std::pair<std::string, std::string> SplitBefore(std::string X,
std::string S) {
auto Pos = S.find(X);
if (Pos == std::string::npos)
return std::make_pair(S, "");
return std::make_pair(S.substr(0, Pos), S.substr(Pos));
}
void DiscardOutput(int Fd);
std::string DisassembleCmd(const std::string &FileName);
std::string SearchRegexCmd(const std::string &Regex);
uint64_t SimpleFastHash(const void *Data, size_t Size, uint64_t Initial = 0);
inline size_t Log(size_t X) {
return static_cast<size_t>((sizeof(unsigned long long) * 8) - Clzll(X) - 1);
}
inline size_t PageSize() { return 4096; }
inline uint8_t *RoundUpByPage(uint8_t *P) {
uintptr_t X = reinterpret_cast<uintptr_t>(P);
size_t Mask = PageSize() - 1;
X = (X + Mask) & ~Mask;
return reinterpret_cast<uint8_t *>(X);
}
inline uint8_t *RoundDownByPage(uint8_t *P) {
uintptr_t X = reinterpret_cast<uintptr_t>(P);
size_t Mask = PageSize() - 1;
X = X & ~Mask;
return reinterpret_cast<uint8_t *>(X);
}
#if __BYTE_ORDER == __LITTLE_ENDIAN
template <typename T> T HostToLE(T X) { return X; }
#else
template <typename T> T HostToLE(T X) { return Bswap(X); }
#endif
} // namespace fuzzer
#endif // LLVM_FUZZER_UTIL_H
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