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usr / src / contrib / llvm-project / compiler-rt / lib / fuzzer /

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📄 FuzzerBuiltins.h(1.25 KB)
📄 FuzzerBuiltinsMsvc.h(2.33 KB)
📄 FuzzerCommand.h(5.95 KB)
📄 FuzzerCorpus.h(16.93 KB)
📄 FuzzerCrossOver.cpp(1.85 KB)
📄 FuzzerDataFlowTrace.cpp(9.93 KB)
📄 FuzzerDataFlowTrace.h(3.98 KB)
📄 FuzzerDefs.h(1.99 KB)
📄 FuzzerDictionary.h(3.32 KB)
📄 FuzzerDriver.cpp(28.35 KB)
📄 FuzzerExtFunctions.def(2.5 KB)
📄 FuzzerExtFunctions.h(1.04 KB)
📄 FuzzerExtFunctionsDlsym.cpp(1.63 KB)
📄 FuzzerExtFunctionsWeak.cpp(1.9 KB)
📄 FuzzerExtFunctionsWindows.cpp(2.79 KB)
📄 FuzzerExtraCounters.cpp(1.55 KB)
📄 FuzzerFlags.def(10.02 KB)
📄 FuzzerFork.cpp(12.53 KB)
📄 FuzzerFork.h(778 B)
📄 FuzzerIO.cpp(4.47 KB)
📄 FuzzerIO.h(3.31 KB)
📄 FuzzerIOPosix.cpp(4.47 KB)
📄 FuzzerIOWindows.cpp(11.59 KB)
📄 FuzzerInterface.h(3.03 KB)
📄 FuzzerInternal.h(5.33 KB)
📄 FuzzerLoop.cpp(28.54 KB)
📄 FuzzerMain.cpp(791 B)
📄 FuzzerMerge.cpp(13.75 KB)
📄 FuzzerMerge.h(3.31 KB)
📄 FuzzerMutate.cpp(20.02 KB)
📄 FuzzerMutate.h(6.57 KB)
📄 FuzzerOptions.h(2.36 KB)
📄 FuzzerPlatform.h(4.69 KB)
📄 FuzzerRandom.h(1.21 KB)
📄 FuzzerSHA1.cpp(5.56 KB)
📄 FuzzerSHA1.h(978 B)
📄 FuzzerTracePC.cpp(22.56 KB)
📄 FuzzerTracePC.h(8.87 KB)
📄 FuzzerUtil.cpp(6.75 KB)
📄 FuzzerUtil.h(3.25 KB)
📄 FuzzerUtilDarwin.cpp(5.87 KB)
📄 FuzzerUtilFuchsia.cpp(20.16 KB)
📄 FuzzerUtilLinux.cpp(1.12 KB)
📄 FuzzerUtilPosix.cpp(5.07 KB)
📄 FuzzerUtilWindows.cpp(5.93 KB)
📄 FuzzerValueBitMap.h(2.24 KB)
📄 README.txt(40 B)

Editing: FuzzerIO.cpp

//===- FuzzerIO.cpp - IO utils. -------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// IO functions.
//===----------------------------------------------------------------------===//

#include "FuzzerDefs.h"
#include "FuzzerExtFunctions.h"
#include "FuzzerIO.h"
#include "FuzzerUtil.h"
#include <algorithm>
#include <cstdarg>
#include <fstream>
#include <iterator>
#include <sys/stat.h>
#include <sys/types.h>

namespace fuzzer {

static FILE *OutputFile = stderr;

long GetEpoch(const std::string &Path) {
  struct stat St;
  if (stat(Path.c_str(), &St))
    return 0;  // Can't stat, be conservative.
  return St.st_mtime;
}

Unit FileToVector(const std::string &Path, size_t MaxSize, bool ExitOnError) {
  std::ifstream T(Path, std::ios::binary);
  if (ExitOnError && !T) {
    Printf("No such directory: %s; exiting\n", Path.c_str());
    exit(1);
  }

T.seekg(0, T.end);
  auto EndPos = T.tellg();
  if (EndPos < 0) return {};
  size_t FileLen = EndPos;
  if (MaxSize)
    FileLen = std::min(FileLen, MaxSize);

T.seekg(0, T.beg);
  Unit Res(FileLen);
  T.read(reinterpret_cast<char *>(Res.data()), FileLen);
  return Res;
}

std::string FileToString(const std::string &Path) {
  std::ifstream T(Path, std::ios::binary);
  return std::string((std::istreambuf_iterator<char>(T)),
                     std::istreambuf_iterator<char>());
}

void CopyFileToErr(const std::string &Path) {
  Printf("%s", FileToString(Path).c_str());
}

void WriteToFile(const Unit &U, const std::string &Path) {
  WriteToFile(U.data(), U.size(), Path);
}

void WriteToFile(const std::string &Data, const std::string &Path) {
  WriteToFile(reinterpret_cast<const uint8_t *>(Data.c_str()), Data.size(),
              Path);
}

void WriteToFile(const uint8_t *Data, size_t Size, const std::string &Path) {
  // Use raw C interface because this function may be called from a sig handler.
  FILE *Out = fopen(Path.c_str(), "wb");
  if (!Out) return;
  fwrite(Data, sizeof(Data[0]), Size, Out);
  fclose(Out);
}

void ReadDirToVectorOfUnits(const char *Path, Vector<Unit> *V,
                            long *Epoch, size_t MaxSize, bool ExitOnError) {
  long E = Epoch ? *Epoch : 0;
  Vector<std::string> Files;
  ListFilesInDirRecursive(Path, Epoch, &Files, /*TopDir*/true);
  size_t NumLoaded = 0;
  for (size_t i = 0; i < Files.size(); i++) {
    auto &X = Files[i];
    if (Epoch && GetEpoch(X) < E) continue;
    NumLoaded++;
    if ((NumLoaded & (NumLoaded - 1)) == 0 && NumLoaded >= 1024)
      Printf("Loaded %zd/%zd files from %s\n", NumLoaded, Files.size(), Path);
    auto S = FileToVector(X, MaxSize, ExitOnError);
    if (!S.empty())
      V->push_back(S);
  }
}

void GetSizedFilesFromDir(const std::string &Dir, Vector<SizedFile> *V) {
  Vector<std::string> Files;
  ListFilesInDirRecursive(Dir, 0, &Files, /*TopDir*/true);
  for (auto &File : Files)
    if (size_t Size = FileSize(File))
      V->push_back({File, Size});
}

std::string DirPlusFile(const std::string &DirPath,
                        const std::string &FileName) {
  return DirPath + GetSeparator() + FileName;
}

void DupAndCloseStderr() {
  int OutputFd = DuplicateFile(2);
  if (OutputFd >= 0) {
    FILE *NewOutputFile = OpenFile(OutputFd, "w");
    if (NewOutputFile) {
      OutputFile = NewOutputFile;
      if (EF->__sanitizer_set_report_fd)
        EF->__sanitizer_set_report_fd(
            reinterpret_cast<void *>(GetHandleFromFd(OutputFd)));
      DiscardOutput(2);
    }
  }
}

void CloseStdout() {
  DiscardOutput(1);
}

void Printf(const char *Fmt, ...) {
  va_list ap;
  va_start(ap, Fmt);
  vfprintf(OutputFile, Fmt, ap);
  va_end(ap);
  fflush(OutputFile);
}

void VPrintf(bool Verbose, const char *Fmt, ...) {
  if (!Verbose) return;
  va_list ap;
  va_start(ap, Fmt);
  vfprintf(OutputFile, Fmt, ap);
  va_end(ap);
  fflush(OutputFile);
}

void RmDirRecursive(const std::string &Dir) {
  IterateDirRecursive(
      Dir, [](const std::string &Path) {},
      [](const std::string &Path) { RmDir(Path); },
      [](const std::string &Path) { RemoveFile(Path); });
}

std::string TempPath(const char *Prefix, const char *Extension) {
  return DirPlusFile(TmpDir(), std::string("libFuzzerTemp.") + Prefix +
                                   std::to_string(GetPid()) + Extension);
}

}  // namespace fuzzer

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Editing: FuzzerIO.cpp

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