Move libFuzzer to compiler_rt.
Resulting library binaries will be named libclang_rt.fuzzer*, and will
be placed in Clang toolchain, allowing redistribution.
Differential Revision: https://reviews.llvm.org/D36908
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@311407 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/FuzzerIO.cpp b/FuzzerIO.cpp
new file mode 100644
index 0000000..1a06d44
--- /dev/null
+++ b/FuzzerIO.cpp
@@ -0,0 +1,120 @@
+//===- 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 "FuzzerIO.h"
+#include "FuzzerDefs.h"
+#include "FuzzerExtFunctions.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);
+ 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);
+ 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) {
+ // Use raw C interface because this function may be called from a sig handler.
+ FILE *Out = fopen(Path.c_str(), "w");
+ if (!Out) return;
+ fwrite(U.data(), sizeof(U[0]), U.size(), Out);
+ fclose(Out);
+}
+
+void ReadDirToVectorOfUnits(const char *Path, std::vector<Unit> *V,
+ long *Epoch, size_t MaxSize, bool ExitOnError) {
+ long E = Epoch ? *Epoch : 0;
+ std::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);
+ }
+}
+
+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);
+}
+
+} // namespace fuzzer