llvm-6502/lib/Fuzzer/FuzzerIO.cpp
Kostya Serebryany c9baf3befb Add a Fuzzer library
Summary:
A simple genetic in-process coverage-guided fuzz testing library.

I've used this fuzzer to test clang-format
(it found 12+ bugs, thanks djasper@ for the fixes!)
and it may also help us test other parts of LLVM.
So why not keep it in the LLVM repository?

I plan to add the cmake build rules later (in a separate patch, if that's ok)
and also add a clang-format-fuzzer target.

See README.txt for details.

Test Plan: Tests will follow separately.

Reviewers: djasper, chandlerc, rnk

Reviewed By: rnk

Subscribers: majnemer, ygribov, dblaikie, llvm-commits

Differential Revision: http://reviews.llvm.org/D7184

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227252 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-27 22:08:41 +00:00

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1.3 KiB
C++

//===- FuzzerIO.cpp - IO utils. -------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// IO functions.
//===----------------------------------------------------------------------===//
#include "FuzzerInternal.h"
#include <fstream>
#include <dirent.h>
namespace fuzzer {
std::vector<std::string> ListFilesInDir(const std::string &Dir) {
std::vector<std::string> V;
DIR *D = opendir(Dir.c_str());
if (!D) return V;
while (auto E = readdir(D)) {
if (E->d_type == DT_REG || E->d_type == DT_LNK)
V.push_back(E->d_name);
}
closedir(D);
return V;
}
Unit FileToVector(const std::string &Path) {
std::ifstream T(Path);
return Unit((std::istreambuf_iterator<char>(T)),
std::istreambuf_iterator<char>());
}
void WriteToFile(const Unit &U, const std::string &Path) {
std::ofstream OF(Path);
OF.write((const char*)U.data(), U.size());
}
void ReadDirToVectorOfUnits(const char *Path, std::vector<Unit> *V) {
for (auto &X : ListFilesInDir(Path))
V->push_back(FileToVector(std::string(Path) + "/" + X));
}
} // namespace fuzzer