--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/llvm-cov/TestingSupport.cpp	Mon Sep 08 22:06:00 2014 +0900
@@ -0,0 +1,92 @@
+//===- TestingSupport.cpp - Convert objects files into test files --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/LEB128.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryObject.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include <system_error>
+#include <functional>
+
+using namespace llvm;
+using namespace object;
+
+int convert_for_testing_main(int argc, const char **argv) {
+  sys::PrintStackTraceOnErrorSignal();
+  PrettyStackTraceProgram X(argc, argv);
+  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+
+  cl::opt<std::string> InputSourceFile(cl::Positional, cl::Required,
+                                       cl::desc("<Source file>"));
+
+  cl::opt<std::string> OutputFilename(
+      "o", cl::Required,
+      cl::desc(
+          "File with the profile data obtained after an instrumented run"));
+
+  cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
+
+  auto ObjErr = llvm::object::ObjectFile::createObjectFile(InputSourceFile);
+  if (auto Err = ObjErr.getError()) {
+    errs() << "error: " << Err.message() << "\n";
+    return 1;
+  }
+  ObjectFile *OF = ObjErr.get().getBinary().get();
+  auto BytesInAddress = OF->getBytesInAddress();
+  if (BytesInAddress != 8) {
+    errs() << "error: 64 bit binary expected\n";
+    return 1;
+  }
+
+  // Look for the sections that we are interested in.
+  int FoundSectionCount = 0;
+  SectionRef ProfileNames, CoverageMapping;
+  for (const auto &Section : OF->sections()) {
+    StringRef Name;
+    if (Section.getName(Name))
+      return 1;
+    if (Name == "__llvm_prf_names") {
+      ProfileNames = Section;
+    } else if (Name == "__llvm_covmap") {
+      CoverageMapping = Section;
+    } else
+      continue;
+    ++FoundSectionCount;
+  }
+  if (FoundSectionCount != 2)
+    return 1;
+
+  // Get the contents of the given sections.
+  StringRef CoverageMappingData;
+  uint64_t ProfileNamesAddress;
+  StringRef ProfileNamesData;
+  if (CoverageMapping.getContents(CoverageMappingData) ||
+      ProfileNames.getAddress(ProfileNamesAddress) ||
+      ProfileNames.getContents(ProfileNamesData))
+    return 1;
+
+  int FD;
+  if (auto Err =
+          sys::fs::openFileForWrite(OutputFilename, FD, sys::fs::F_None)) {
+    errs() << "error: " << Err.message() << "\n";
+    return 1;
+  }
+
+  raw_fd_ostream OS(FD, true);
+  OS << "llvmcovmtestdata";
+  encodeULEB128(ProfileNamesData.size(), OS);
+  encodeULEB128(ProfileNamesAddress, OS);
+  OS << ProfileNamesData << CoverageMappingData;
+
+  return 0;
+}