mirror of
https://github.com/Gericom/teak-llvm.git
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e5b603a4c3
Summary:
This commit moves the `DiscardOutput` function in FuzzerIO to
FuzzerUtil, so fuchsia can have its own specialized version.
In fuchsia, accessing `/dev/null` is not supported, and there's nothing
similar to a file that discards everything that is written to it. The
way of doing something similar in fuchsia is by using `fdio_null_create`
and binding that to a file descriptor with `fdio_bind_to_fd`.
This change should fix one of the issues with the `-close_fd_mask` flag
in libfuzzer, in which closing stdout was not working due to
`fopen("/dev/null", "w")` returning `NULL`.
Reviewers: kcc, aarongreen
Subscribers: #sanitizers, llvm-commits
Tags: #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D69593
107 lines
3.3 KiB
C++
107 lines
3.3 KiB
C++
//===- FuzzerIO.h - Internal header for IO utils ----------------*- C++ -* ===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// IO interface.
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_FUZZER_IO_H
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#define LLVM_FUZZER_IO_H
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#include "FuzzerDefs.h"
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namespace fuzzer {
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long GetEpoch(const std::string &Path);
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Unit FileToVector(const std::string &Path, size_t MaxSize = 0,
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bool ExitOnError = true);
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std::string FileToString(const std::string &Path);
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void CopyFileToErr(const std::string &Path);
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void WriteToFile(const uint8_t *Data, size_t Size, const std::string &Path);
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// Write Data.c_str() to the file without terminating null character.
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void WriteToFile(const std::string &Data, const std::string &Path);
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void WriteToFile(const Unit &U, const std::string &Path);
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void ReadDirToVectorOfUnits(const char *Path, Vector<Unit> *V,
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long *Epoch, size_t MaxSize, bool ExitOnError);
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// Returns "Dir/FileName" or equivalent for the current OS.
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std::string DirPlusFile(const std::string &DirPath,
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const std::string &FileName);
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// Returns the name of the dir, similar to the 'dirname' utility.
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std::string DirName(const std::string &FileName);
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// Returns path to a TmpDir.
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std::string TmpDir();
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std::string TempPath(const char *Extension);
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bool IsInterestingCoverageFile(const std::string &FileName);
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void DupAndCloseStderr();
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void CloseStdout();
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void Printf(const char *Fmt, ...);
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void VPrintf(bool Verbose, const char *Fmt, ...);
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// Print using raw syscalls, useful when printing at early init stages.
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void RawPrint(const char *Str);
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// Platform specific functions:
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bool IsFile(const std::string &Path);
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size_t FileSize(const std::string &Path);
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void ListFilesInDirRecursive(const std::string &Dir, long *Epoch,
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Vector<std::string> *V, bool TopDir);
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void RmDirRecursive(const std::string &Dir);
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// Iterate files and dirs inside Dir, recursively.
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// Call DirPreCallback/DirPostCallback on dirs before/after
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// calling FileCallback on files.
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void IterateDirRecursive(const std::string &Dir,
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void (*DirPreCallback)(const std::string &Dir),
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void (*DirPostCallback)(const std::string &Dir),
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void (*FileCallback)(const std::string &Dir));
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struct SizedFile {
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std::string File;
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size_t Size;
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bool operator<(const SizedFile &B) const { return Size < B.Size; }
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};
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void GetSizedFilesFromDir(const std::string &Dir, Vector<SizedFile> *V);
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char GetSeparator();
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// Similar to the basename utility: returns the file name w/o the dir prefix.
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std::string Basename(const std::string &Path);
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FILE* OpenFile(int Fd, const char *Mode);
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int CloseFile(int Fd);
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int DuplicateFile(int Fd);
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void RemoveFile(const std::string &Path);
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void RenameFile(const std::string &OldPath, const std::string &NewPath);
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intptr_t GetHandleFromFd(int fd);
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void MkDir(const std::string &Path);
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void RmDir(const std::string &Path);
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const std::string &getDevNull();
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} // namespace fuzzer
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#endif // LLVM_FUZZER_IO_H
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