Merge gtest-1.3.0.

OSX users: make sure that CrashReporter is disabled when running unit tests.
Death tests are enabled now so you'll get a ton of message boxes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105352 91177308-0d34-0410-b5e6-96231b3b80d8

20 files changed, 2089 insertions, 468 deletions

diff --git a/utils/unittest/googletest/gtest-death-test.cc b/utils/unittest/googletest/gtest-death-test.cc
index 617e3010f2..149b8a6c59 100644
--- a/utils/unittest/googletest/gtest-death-test.cc
+++ b/utils/unittest/googletest/gtest-death-test.cc
@@ -27,17 +27,31 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
-// Author: wan@google.com (Zhanyong Wan)
+// Author: wan@google.com (Zhanyong Wan), vladl@google.com (Vlad Losev)
 //
 // This file implements death tests.
 
 #include <gtest/gtest-death-test.h>
 #include <gtest/internal/gtest-port.h>
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
+
+#if GTEST_OS_MAC
+#include <crt_externs.h>
+#endif  // GTEST_OS_MAC
+
 #include <errno.h>
+#include <fcntl.h>
 #include <limits.h>
 #include <stdarg.h>
+
+#if GTEST_OS_WINDOWS
+#include <windows.h>
+#else
+#include <sys/mman.h>
+#include <sys/wait.h>
+#endif  // GTEST_OS_WINDOWS
+
 #endif  // GTEST_HAS_DEATH_TEST
 
 #include <gtest/gtest-message.h>
@@ -48,9 +62,9 @@
 // included, or there will be a compiler error.  This trick is to
 // prevent a user from accidentally including gtest-internal-inl.h in
 // his code.
-#define GTEST_IMPLEMENTATION
+#define GTEST_IMPLEMENTATION_ 1
 #include "gtest/internal/gtest-internal-inl.h"
-#undef GTEST_IMPLEMENTATION
+#undef GTEST_IMPLEMENTATION_
 
 namespace testing {
 
@@ -68,6 +82,18 @@ GTEST_DEFINE_string_(
     "\"fast\" (child process runs the death test immediately "
     "after forking).");
 
+GTEST_DEFINE_bool_(
+    death_test_use_fork,
+    internal::BoolFromGTestEnv("death_test_use_fork", false),
+    "Instructs to use fork()/_exit() instead of clone() in death tests. "
+    "Ignored and always uses fork() on POSIX systems where clone() is not "
+    "implemented. Useful when running under valgrind or similar tools if "
+    "those do not support clone(). Valgrind 3.3.1 will just fail if "
+    "it sees an unsupported combination of clone() flags. "
+    "It is not recommended to use this flag w/o valgrind though it will "
+    "work in 99% of the cases. Once valgrind is fixed, this flag will "
+    "most likely be removed.");
+
 namespace internal {
 GTEST_DEFINE_string_(
     internal_run_death_test, "",
@@ -79,7 +105,7 @@ GTEST_DEFINE_string_(
     "death test.  FOR INTERNAL USE ONLY.");
 }  // namespace internal
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
 
 // ExitedWithCode constructor.
 ExitedWithCode::ExitedWithCode(int exit_code) : exit_code_(exit_code) {
@@ -87,9 +113,14 @@ ExitedWithCode::ExitedWithCode(int exit_code) : exit_code_(exit_code) {
 
 // ExitedWithCode function-call operator.
 bool ExitedWithCode::operator()(int exit_status) const {
+#if GTEST_OS_WINDOWS
+  return exit_status == exit_code_;
+#else
   return WIFEXITED(exit_status) && WEXITSTATUS(exit_status) == exit_code_;
+#endif  // GTEST_OS_WINDOWS
 }
 
+#if !GTEST_OS_WINDOWS
 // KilledBySignal constructor.
 KilledBySignal::KilledBySignal(int signum) : signum_(signum) {
 }
@@ -98,6 +129,7 @@ KilledBySignal::KilledBySignal(int signum) : signum_(signum) {
 bool KilledBySignal::operator()(int exit_status) const {
   return WIFSIGNALED(exit_status) && WTERMSIG(exit_status) == signum_;
 }
+#endif  // !GTEST_OS_WINDOWS
 
 namespace internal {
 
@@ -107,6 +139,9 @@ namespace internal {
 // specified by wait(2).
 static String ExitSummary(int exit_code) {
   Message m;
+#if GTEST_OS_WINDOWS
+  m << "Exited with exit status " << exit_code;
+#else
   if (WIFEXITED(exit_code)) {
     m << "Exited with exit status " << WEXITSTATUS(exit_code);
   } else if (WIFSIGNALED(exit_code)) {
@@ -117,6 +152,7 @@ static String ExitSummary(int exit_code) {
     m << " (core dumped)";
   }
 #endif
+#endif  // GTEST_OS_WINDOWS
   return m.GetString();
 }
 
@@ -126,6 +162,7 @@ bool ExitedUnsuccessfully(int exit_status) {
   return !ExitedWithCode(0)(exit_status);
 }
 
+#if !GTEST_OS_WINDOWS
 // Generates a textual failure message when a death test finds more than
 // one thread running, or cannot determine the number of threads, prior
 // to executing the given statement.  It is the responsibility of the
@@ -133,17 +170,14 @@ bool ExitedUnsuccessfully(int exit_status) {
 static String DeathTestThreadWarning(size_t thread_count) {
   Message msg;
   msg << "Death tests use fork(), which is unsafe particularly"
-      << " in a threaded context. For this test, " << GTEST_NAME << " ";
+      << " in a threaded context. For this test, " << GTEST_NAME_ << " ";
   if (thread_count == 0)
     msg << "couldn't detect the number of threads.";
   else
     msg << "detected " << thread_count << " threads.";
   return msg.GetString();
 }
-
-// Static string containing a description of the outcome of the
-// last death test.
-static String last_death_test_message;
+#endif  // !GTEST_OS_WINDOWS
 
 // Flag characters for reporting a death test that did not die.
 static const char kDeathTestLived = 'L';
@@ -159,29 +193,33 @@ static const char kDeathTestInternalError = 'I';
 enum DeathTestOutcome { IN_PROGRESS, DIED, LIVED, RETURNED };
 
 // Routine for aborting the program which is safe to call from an
-// exec-style death test child process, in which case the the error
+// exec-style death test child process, in which case the error
 // message is propagated back to the parent process.  Otherwise, the
 // message is simply printed to stderr.  In either case, the program
 // then exits with status 1.
-void DeathTestAbort(const char* format, ...) {
-  // This function may be called from a threadsafe-style death test
-  // child process, which operates on a very small stack.  Use the
-  // heap for any additional non-miniscule memory requirements.
+void DeathTestAbort(const String& message) {
+  // On a POSIX system, this function may be called from a threadsafe-style
+  // death test child process, which operates on a very small stack.  Use
+  // the heap for any additional non-minuscule memory requirements.
   const InternalRunDeathTestFlag* const flag =
       GetUnitTestImpl()->internal_run_death_test_flag();
-  va_list args;
-  va_start(args, format);
-
   if (flag != NULL) {
-    FILE* parent = fdopen(flag->status_fd, "w");
+// Suppress MSVC complaints about POSIX functions.
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4996)
+#endif  // _MSC_VER
+    FILE* parent = fdopen(flag->status_fd(), "w");
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif  // _MSC_VER
     fputc(kDeathTestInternalError, parent);
-    vfprintf(parent, format, args);
-    fclose(parent);
-    va_end(args);
+    fprintf(parent, "%s", message.c_str());
+    fflush(parent);
     _exit(1);
   } else {
-    vfprintf(stderr, format, args);
-    va_end(args);
+    fprintf(stderr, "%s", message.c_str());
+    fflush(stderr);
     abort();
   }
 }
@@ -191,8 +229,9 @@ void DeathTestAbort(const char* format, ...) {
 #define GTEST_DEATH_TEST_CHECK_(expression) \
   do { \
     if (!(expression)) { \
-      DeathTestAbort("CHECK failed: File %s, line %d: %s", \
-                     __FILE__, __LINE__, #expression); \
+      DeathTestAbort(::testing::internal::String::Format(\
+          "CHECK failed: File %s, line %d: %s", \
+          __FILE__, __LINE__, #expression)); \
     } \
   } while (0)
 
@@ -205,16 +244,59 @@ void DeathTestAbort(const char* format, ...) {
 // something other than EINTR, DeathTestAbort is called.
 #define GTEST_DEATH_TEST_CHECK_SYSCALL_(expression) \
   do { \
-    int retval; \
+    int gtest_retval; \
     do { \
-      retval = (expression); \
-    } while (retval == -1 && errno == EINTR); \
-    if (retval == -1) { \
-      DeathTestAbort("CHECK failed: File %s, line %d: %s != -1", \
-                     __FILE__, __LINE__, #expression); \
+      gtest_retval = (expression); \
+    } while (gtest_retval == -1 && errno == EINTR); \
+    if (gtest_retval == -1) { \
+      DeathTestAbort(::testing::internal::String::Format(\
+          "CHECK failed: File %s, line %d: %s != -1", \
+          __FILE__, __LINE__, #expression)); \
     } \
   } while (0)
 
+// Returns the message describing the last system error, regardless of the
+// platform.
+String GetLastSystemErrorMessage() {
+#if GTEST_OS_WINDOWS
+    const DWORD error_num = ::GetLastError();
+
+    if (error_num == NULL)
+      return String("");
+
+    char* message_ptr;
+
+    ::FormatMessageA(
+        // The caller does not provide a buffer. The function will allocate one.
+        FORMAT_MESSAGE_ALLOCATE_BUFFER |
+            // The function must look up an error message in its system error
+            // message table.
+            FORMAT_MESSAGE_FROM_SYSTEM |
+            // Do not expand insert sequences in the message definition.
+            FORMAT_MESSAGE_IGNORE_INSERTS,
+        NULL,  // Message source. Ignored in this call.
+        error_num,
+        0x0,  // Use system-default language.
+        reinterpret_cast<LPSTR>(&message_ptr),
+        0,  // Buffer size. Ignored in this call.
+        NULL);  // Message arguments. Ignored in this call.
+
+    const String message = message_ptr;
+    ::LocalFree(message_ptr);
+    return message;
+#else
+    return errno == 0 ? String("") : String(strerror(errno));
+#endif  // GTEST_OS_WINDOWS
+}
+
+// TODO(vladl@google.com): Move the definition of FailFromInternalError
+// here.
+#if GTEST_OS_WINDOWS
+static void FailFromInternalError(HANDLE handle);
+#else
+static void FailFromInternalError(int fd);
+#endif  // GTEST_OS_WINDOWS
+
 // Death test constructor.  Increments the running death test count
 // for the current test.
 DeathTest::DeathTest() {
@@ -234,61 +316,393 @@ bool DeathTest::Create(const char* statement, const RE* regex,
 }
 
 const char* DeathTest::LastMessage() {
-  return last_death_test_message.c_str();
+  return last_death_test_message_.c_str();
 }
 
+void DeathTest::set_last_death_test_message(const String& message) {
+  last_death_test_message_ = message;
+}
+
+String DeathTest::last_death_test_message_;
+
+// Provides cross platform implementation for some death functionality.
+// TODO(vladl@google.com): Merge this class with DeathTest in
+// gtest-death-test-internal.h.
+class DeathTestImpl : public DeathTest {
+ protected:
+  DeathTestImpl(const char* statement, const RE* regex)
+      : statement_(statement),
+        regex_(regex),
+        spawned_(false),
+        status_(-1),
+        outcome_(IN_PROGRESS) {}
+
+  virtual bool Passed(bool status_ok);
+
+  const char* statement() const { return statement_; }
+  const RE* regex() const { return regex_; }
+  bool spawned() const { return spawned_; }
+  void set_spawned(bool spawned) { spawned_ = spawned; }
+  int status() const { return status_; }
+  void set_status(int status) { status_ = status; }
+  DeathTestOutcome outcome() const { return outcome_; }
+  void set_outcome(DeathTestOutcome outcome) { outcome_ = outcome; }
+
+ private:
+  // The textual content of the code this object is testing.  This class
+  // doesn't own this string and should not attempt to delete it.
+  const char* const statement_;
+  // The regular expression which test output must match.  DeathTestImpl
+  // doesn't own this object and should not attempt to delete it.
+  const RE* const regex_;
+  // True if the death test child process has been successfully spawned.
+  bool spawned_;
+  // The exit status of the child process.
+  int status_;
+  // How the death test concluded.
+  DeathTestOutcome outcome_;
+};
+
+// TODO(vladl@google.com): Move definition of DeathTestImpl::Passed() here.
+
+#if GTEST_OS_WINDOWS
+// WindowsDeathTest implements death tests on Windows. Due to the
+// specifics of starting new processes on Windows, death tests there are
+// always threadsafe, and Google Test considers the
+// --gtest_death_test_style=fast setting to be equivalent to
+// --gtest_death_test_style=threadsafe there.
+//
+// A few implementation notes:  Like the Linux version, the Windows
+// implementation uses pipes for child-to-parent communication. But due to
+// the specifics of pipes on Windows, some extra steps are required:
+//
+// 1. The parent creates a communication pipe and stores handles to both
+//    ends of it.
+// 2. The parent starts the child and provides it with the information
+//    necessary to acquire the handle to the write end of the pipe.
+// 3. The child acquires the write end of the pipe and signals the parent
+//    using a Windows event.
+// 4. Now the parent can release the write end of the pipe on its side. If
+//    this is done before step 3, the object's reference count goes down to
+//    0 and it is destroyed, preventing the child from acquiring it. The
+//    parent now has to release it, or read operations on the read end of
+//    the pipe will not return when the child terminates.
+// 5. The parent reads child's output through the pipe (outcome code and
+//    any possible error messages) from the pipe, and its stderr and then
+//    determines whether to fail the test.
+//
+// Note: to distinguish Win32 API calls from the local method and function
+// calls, the former are explicitly resolved in the global namespace.
+//
+class WindowsDeathTest : public DeathTestImpl {
+ public:
+  WindowsDeathTest(const char* statement,
+                   const RE* regex,
+                   const char* file,
+                   int line)
+      : DeathTestImpl(statement, regex), file_(file), line_(line) {}
+
+  // All of these virtual functions are inherited from DeathTest.
+  virtual int Wait();
+  virtual void Abort(AbortReason reason);
+  virtual TestRole AssumeRole();
+
+ private:
+  // The name of the file in which the death test is located.
+  const char* const file_;
+  // The line number on which the death test is located.
+  const int line_;
+  // Handle to the read end of the pipe to the child process.
+  // The child keeps its write end of the pipe in the status_handle_
+  // field of its InternalRunDeathTestFlag class.
+  AutoHandle read_handle_;
+  // Handle to the write end of the pipe to the child process.
+  AutoHandle write_handle_;
+  // Child process handle.
+  AutoHandle child_handle_;
+  // Event the child process uses to signal the parent that it has
+  // acquired the handle to the write end of the pipe. After seeing this
+  // event the parent can release its own handles to make sure its
+  // ReadFile() calls return when the child terminates.
+  AutoHandle event_handle_;
+};
+
+// Waits for the child in a death test to exit, returning its exit
+// status, or 0 if no child process exists.  As a side effect, sets the
+// outcome data member.
+// TODO(vladl@google.com): Outcome classification logic is common with
+//                         ForkingDeathTes::Wait(). Refactor it into a
+//                         common function.
+int WindowsDeathTest::Wait() {
+  if (!spawned())
+    return 0;
+
+  // Wait until the child either signals that it has acquired the write end
+  // of the pipe or it dies.
+  const HANDLE wait_handles[2] = { child_handle_.Get(), event_handle_.Get() };
+  switch (::WaitForMultipleObjects(2,
+                                   wait_handles,
+                                   FALSE,  // Waits for any of the handles.
+                                   INFINITE)) {
+    case WAIT_OBJECT_0:
+    case WAIT_OBJECT_0 + 1:
+      break;
+    default:
+      GTEST_DEATH_TEST_CHECK_(false);  // Should not get here.
+  }
+
+  // The child has acquired the write end of the pipe or exited.
+  // We release the handle on our side and continue.
+  write_handle_.Reset();
+  event_handle_.Reset();
+
+  // ReadFile() blocks until data is available (signifying the
+  // failure of the death test) or until the pipe is closed (signifying
+  // its success), so it's okay to call this in the parent before or
+  // after the child process has exited.
+  char flag;
+  DWORD bytes_read;
+  GTEST_DEATH_TEST_CHECK_(::ReadFile(read_handle_.Get(),
+                                     &flag,
+                                     1,
+                                     &bytes_read,
+                                     NULL) ||
+                          ::GetLastError() == ERROR_BROKEN_PIPE);
+
+  if (bytes_read == 0) {
+    set_outcome(DIED);
+  } else if (bytes_read == 1) {
+    switch (flag) {
+      case kDeathTestReturned:
+        set_outcome(RETURNED);
+        break;
+      case kDeathTestLived:
+        set_outcome(LIVED);
+        break;
+      case kDeathTestInternalError:
+        FailFromInternalError(read_handle_.Get());  // Does not return.
+        break;
+      default:
+        GTEST_LOG_(FATAL,
+                   Message() << "Death test child process reported "
+                   << " unexpected status byte ("
+                   << static_cast<unsigned int>(flag) << ")");
+    }
+  } else {
+    GTEST_LOG_(FATAL,
+               Message() << "Read from death test child process failed: "
+                         << GetLastSystemErrorMessage());
+  }
+  read_handle_.Reset();  // Done with reading.
+
+  // Waits for the child process to exit if it haven't already. This
+  // returns immediately if the child has already exited, regardless of
+  // whether previous calls to WaitForMultipleObjects synchronized on this
+  // handle or not.
+  GTEST_DEATH_TEST_CHECK_(
+      WAIT_OBJECT_0 == ::WaitForSingleObject(child_handle_.Get(),
+                                             INFINITE));
+  DWORD status;
+  GTEST_DEATH_TEST_CHECK_(::GetExitCodeProcess(child_handle_.Get(),
+                                               &status));
+  child_handle_.Reset();
+  set_status(static_cast<int>(status));
+  return this->status();
+}
+
+// TODO(vladl@google.com): define a cross-platform way to write to
+// status_fd to be used both here and in ForkingDeathTest::Abort().
+//
+// Signals that the death test did not die as expected. This is called
+// from the child process only.
+void WindowsDeathTest::Abort(AbortReason reason) {
+  const InternalRunDeathTestFlag* const internal_flag =
+      GetUnitTestImpl()->internal_run_death_test_flag();
+  // The parent process considers the death test to be a failure if
+  // it finds any data in our pipe.  So, here we write a single flag byte
+  // to the pipe, then exit.
+  const char status_ch =
+      reason == TEST_DID_NOT_DIE ? kDeathTestLived : kDeathTestReturned;
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4996)
+#endif  // _MSC_VER
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(write(internal_flag->status_fd(),
+                                        &status_ch, 1));
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif  // _MSC_VER
+
+  // The write handle will be closed when the child terminates in _exit().
+  _exit(1);  // Exits w/o any normal exit hooks (we were supposed to crash)
+}
+
+// The AssumeRole process for a Windows death test.  It creates a child
+// process with the same executable as the current process to run the
+// death test.  The child process is given the --gtest_filter and
+// --gtest_internal_run_death_test flags such that it knows to run the
+// current death test only.
+DeathTest::TestRole WindowsDeathTest::AssumeRole() {
+  const UnitTestImpl* const impl = GetUnitTestImpl();
+  const InternalRunDeathTestFlag* const flag =
+      impl->internal_run_death_test_flag();
+  const TestInfo* const info = impl->current_test_info();
+  const int death_test_index = info->result()->death_test_count();
+
+  if (flag != NULL) {
+    // ParseInternalRunDeathTestFlag() has performed all the necessary
+    // processing.
+    return EXECUTE_TEST;
+  }
+
+  // WindowsDeathTest uses an anonymous pipe to communicate results of
+  // a death test.
+  SECURITY_ATTRIBUTES handles_are_inheritable = {
+    sizeof(SECURITY_ATTRIBUTES), NULL, TRUE };
+  HANDLE read_handle, write_handle;
+  GTEST_DEATH_TEST_CHECK_(::CreatePipe(&read_handle, &write_handle,
+                                       &handles_are_inheritable,
+                                       0));  // Default buffer size.
+  read_handle_.Reset(read_handle);
+  write_handle_.Reset(write_handle);
+  event_handle_.Reset(::CreateEvent(
+      &handles_are_inheritable,
+      TRUE,    // The event will automatically reset to non-signaled state.
+      FALSE,   // The initial state is non-signalled.
+      NULL));  // The even is unnamed.
+  GTEST_DEATH_TEST_CHECK_(event_handle_.Get() != NULL);
+  const String filter_flag = String::Format("--%s%s=%s.%s",
+                                            GTEST_FLAG_PREFIX_, kFilterFlag,
+                                            info->test_case_name(),
+                                            info->name());
+  const String internal_flag = String::Format(
+    "--%s%s=%s|%d|%d|%u|%Iu|%Iu",
+      GTEST_FLAG_PREFIX_,
+      kInternalRunDeathTestFlag,
+      file_, line_,
+      death_test_index,
+      static_cast<unsigned int>(::GetCurrentProcessId()),
+      // size_t has the same with as pointers on both 32-bit and 64-bit
+      // Windows platforms.
+      // See http://msdn.microsoft.com/en-us/library/tcxf1dw6.aspx.
+      reinterpret_cast<size_t>(write_handle),
+      reinterpret_cast<size_t>(event_handle_.Get()));
+
+  char executable_path[_MAX_PATH + 1];  // NOLINT
+  GTEST_DEATH_TEST_CHECK_(
+      _MAX_PATH + 1 != ::GetModuleFileNameA(NULL,
+                                            executable_path,
+                                            _MAX_PATH));
+
+  String command_line = String::Format("%s %s \"%s\"",
+                                       ::GetCommandLineA(),
+                                       filter_flag.c_str(),
+                                       internal_flag.c_str());
+
+  DeathTest::set_last_death_test_message("");
+
+  CaptureStderr();
+  // Flush the log buffers since the log streams are shared with the child.
+  FlushInfoLog();
+
+  // The child process will share the standard handles with the parent.
+  STARTUPINFOA startup_info;
+  memset(&startup_info, 0, sizeof(STARTUPINFO));
+  startup_info.dwFlags = STARTF_USESTDHANDLES;
+  startup_info.hStdInput = ::GetStdHandle(STD_INPUT_HANDLE);
+  startup_info.hStdOutput = ::GetStdHandle(STD_OUTPUT_HANDLE);
+  startup_info.hStdError = ::GetStdHandle(STD_ERROR_HANDLE);
+
+  PROCESS_INFORMATION process_info;
+  GTEST_DEATH_TEST_CHECK_(::CreateProcessA(
+      executable_path,
+      const_cast<char*>(command_line.c_str()),
+      NULL,   // Retuned process handle is not inheritable.
+      NULL,   // Retuned thread handle is not inheritable.
+      TRUE,   // Child inherits all inheritable handles (for write_handle_).
+      0x0,    // Default creation flags.
+      NULL,   // Inherit the parent's environment.
+      UnitTest::GetInstance()->original_working_dir(),
+      &startup_info,
+      &process_info));
+  child_handle_.Reset(process_info.hProcess);
+  ::CloseHandle(process_info.hThread);
+  set_spawned(true);
+  return OVERSEE_TEST;
+}
+#else  // We are not on Windows.
+
 // ForkingDeathTest provides implementations for most of the abstract
 // methods of the DeathTest interface.  Only the AssumeRole method is
 // left undefined.
-class ForkingDeathTest : public DeathTest {
+class ForkingDeathTest : public DeathTestImpl {
  public:
   ForkingDeathTest(const char* statement, const RE* regex);
 
   // All of these virtual functions are inherited from DeathTest.
   virtual int Wait();
-  virtual bool Passed(bool status_ok);
   virtual void Abort(AbortReason reason);
 
  protected:
-  void set_forked(bool forked) { forked_ = forked; }
   void set_child_pid(pid_t child_pid) { child_pid_ = child_pid; }
   void set_read_fd(int fd) { read_fd_ = fd; }
   void set_write_fd(int fd) { write_fd_ = fd; }
 
  private:
-  // The textual content of the code this object is testing.
-  const char* const statement_;
-  // The regular expression which test output must match.
-  const RE* const regex_;
-  // True if the death test successfully forked.
-  bool forked_;
   // PID of child process during death test; 0 in the child process itself.
   pid_t child_pid_;
   // File descriptors for communicating the death test's status byte.
   int read_fd_;   // Always -1 in the child process.
   int write_fd_;  // Always -1 in the parent process.
-  // The exit status of the child process.
-  int status_;
-  // How the death test concluded.
-  DeathTestOutcome outcome_;
 };
 
 // Constructs a ForkingDeathTest.
 ForkingDeathTest::ForkingDeathTest(const char* statement, const RE* regex)
-    : DeathTest(),
-      statement_(statement),
-      regex_(regex),
-      forked_(false),
+    : DeathTestImpl(statement, regex),
       child_pid_(-1),
       read_fd_(-1),
-      write_fd_(-1),
-      status_(-1),
-      outcome_(IN_PROGRESS) {
+      write_fd_(-1) {
 }
+#endif  // GTEST_OS_WINDOWS
+
+// This is called from a death test parent process to read a failure
+// message from the death test child process and log it with the FATAL
+// severity. On Windows, the message is read from a pipe handle. On other
+// platforms, it is read from a file descriptor.
+// TODO(vladl@google.com): Re-factor the code to merge common parts after
+// the reading code is abstracted.
+#if GTEST_OS_WINDOWS
+static void FailFromInternalError(HANDLE handle) {
+  Message error;
+  char buffer[256];
 
-// Reads an internal failure message from a file descriptor, then calls
-// LOG(FATAL) with that message.  Called from a death test parent process
-// to read a failure message from the death test child process.
+  bool read_succeeded = true;
+  DWORD bytes_read;
+  do {
+    // ERROR_BROKEN_PIPE arises when the other end of the pipe has been
+    // closed. This is a normal condition for us.
+    bytes_read = 0;
+    read_succeeded = ::ReadFile(handle,
+                                buffer,
+                                sizeof(buffer) - 1,
+                                &bytes_read,
+                                NULL) || ::GetLastError() == ERROR_BROKEN_PIPE;
+    buffer[bytes_read] = 0;
+    error << buffer;
+  } while (read_succeeded && bytes_read > 0);
+
+  if (read_succeeded) {
+    GTEST_LOG_(FATAL, error);
+  } else {
+    const DWORD last_error = ::GetLastError();
+    const String message = GetLastSystemErrorMessage();
+    GTEST_LOG_(FATAL,
+               Message() << "Error while reading death test internal: "
+               << message << " [" << last_error << "]");
+  }
+}
+#else
 static void FailFromInternalError(int fd) {
   Message error;
   char buffer[256];
@@ -301,21 +715,24 @@ static void FailFromInternalError(int fd) {
     }
   } while (num_read == -1 && errno == EINTR);
 
-  // TODO(smcafee):  Maybe just FAIL the test instead?
   if (num_read == 0) {
     GTEST_LOG_(FATAL, error);
   } else {
+    const int last_error = errno;
+    const String message = GetLastSystemErrorMessage();
     GTEST_LOG_(FATAL,
                Message() << "Error while reading death test internal: "
-               << strerror(errno) << " [" << errno << "]");
+               << message << " [" << last_error << "]");
   }
 }
+#endif  // GTEST_OS_WINDOWS
 
+#if !GTEST_OS_WINDOWS
 // Waits for the child in a death test to exit, returning its exit
 // status, or 0 if no child process exists.  As a side effect, sets the
 // outcome data member.
 int ForkingDeathTest::Wait() {
-  if (!forked_)
+  if (!spawned())
     return 0;
 
   // The read() here blocks until data is available (signifying the
@@ -330,14 +747,14 @@ int ForkingDeathTest::Wait() {
   } while (bytes_read == -1 && errno == EINTR);
 
   if (bytes_read == 0) {
-    outcome_ = DIED;
+    set_outcome(DIED);
   } else if (bytes_read == 1) {
     switch (flag) {
       case kDeathTestReturned:
-        outcome_ = RETURNED;
+        set_outcome(RETURNED);
         break;
       case kDeathTestLived:
-        outcome_ = LIVED;
+        set_outcome(LIVED);
         break;
       case kDeathTestInternalError:
         FailFromInternalError(read_fd_);  // Does not return.
@@ -349,28 +766,34 @@ int ForkingDeathTest::Wait() {
                    << ")");
     }
   } else {
+    const String error_message = GetLastSystemErrorMessage();
     GTEST_LOG_(FATAL,
                Message() << "Read from death test child process failed: "
-               << strerror(errno));
+                         << error_message);
   }
 
   GTEST_DEATH_TEST_CHECK_SYSCALL_(close(read_fd_));
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(waitpid(child_pid_, &status_, 0));
-  return status_;
+  int status;
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(waitpid(child_pid_, &status, 0));
+  set_status(status);
+  return status;
 }
+#endif  // !GTEST_OS_WINDOWS
 
 // Assesses the success or failure of a death test, using both private
 // members which have previously been set, and one argument:
 //
 // Private data members:
-//   outcome:  an enumeration describing how the death test
+//   outcome:  An enumeration describing how the death test
 //             concluded: DIED, LIVED, or RETURNED.  The death test fails
-//             in the latter two cases
-//   status:   the exit status of the child process, in the format
-//             specified by wait(2)
-//   regex:    a regular expression object to be applied to
+//             in the latter two cases.
+//   status:   The exit status of the child process. On *nix, it is in the
+//             in the format specified by wait(2). On Windows, this is the
+//             value supplied to the ExitProcess() API or a numeric code
+//             of the exception that terminated the program.
+//   regex:    A regular expression object to be applied to
 //             the test's captured standard error output; the death test
-//             fails if it does not match
+//             fails if it does not match.
 //
 // Argument:
 //   status_ok: true if exit_status is acceptable in the context of
@@ -378,9 +801,9 @@ int ForkingDeathTest::Wait() {
 //
 // Returns true iff all of the above conditions are met.  Otherwise, the
 // first failing condition, in the order given above, is the one that is
-// reported. Also sets the static variable last_death_test_message.
-bool ForkingDeathTest::Passed(bool status_ok) {
-  if (!forked_)
+// reported. Also sets the last death test message string.
+bool DeathTestImpl::Passed(bool status_ok) {
+  if (!spawned())
     return false;
 
 #if GTEST_HAS_GLOBAL_STRING
@@ -392,8 +815,8 @@ bool ForkingDeathTest::Passed(bool status_ok) {
   bool success = false;
   Message buffer;
 
-  buffer << "Death test: " << statement_ << "\n";
-  switch (outcome_) {
+  buffer << "Death test: " << statement() << "\n";
+  switch (outcome()) {
     case LIVED:
       buffer << "    Result: failed to die.\n"
              << " Error msg: " << error_message;
@@ -404,16 +827,16 @@ bool ForkingDeathTest::Passed(bool status_ok) {
       break;
     case DIED:
       if (status_ok) {
-        if (RE::PartialMatch(error_message, *regex_)) {
+        if (RE::PartialMatch(error_message, *regex())) {
           success = true;
         } else {
           buffer << "    Result: died but not with expected error.\n"
-                 << "  Expected: " << regex_->pattern() << "\n"
+                 << "  Expected: " << regex()->pattern() << "\n"
                  << "Actual msg: " << error_message;
         }
       } else {
         buffer << "    Result: died but not with expected exit code:\n"
-               << "            " << ExitSummary(status_) << "\n";
+               << "            " << ExitSummary(status()) << "\n";
       }
       break;
     case IN_PROGRESS:
@@ -422,13 +845,14 @@ bool ForkingDeathTest::Passed(bool status_ok) {
                  "DeathTest::Passed somehow called before conclusion of test");
   }
 
-  last_death_test_message = buffer.GetString();
+  DeathTest::set_last_death_test_message(buffer.GetString());
   return success;
 }
 
+#if !GTEST_OS_WINDOWS
 // Signals that the death test code which should have exited, didn't.
 // Should be called only in a death test child process.
-// Writes a status byte to the child's status file desriptor, then
+// Writes a status byte to the child's status file descriptor, then
 // calls _exit(1).
 void ForkingDeathTest::Abort(AbortReason reason) {
   // The parent process considers the death test to be a failure if
@@ -461,7 +885,7 @@ DeathTest::TestRole NoExecDeathTest::AssumeRole() {
   int pipe_fd[2];
   GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
 
-  last_death_test_message = "";
+  DeathTest::set_last_death_test_message("");
   CaptureStderr();
   // When we fork the process below, the log file buffers are copied, but the
   // file descriptors are shared.  We flush all log files here so that closing
@@ -486,7 +910,7 @@ DeathTest::TestRole NoExecDeathTest::AssumeRole() {
   } else {
     GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
     set_read_fd(pipe_fd[0]);
-    set_forked(true);
+    set_spawned(true);
     return OVERSEE_TEST;
   }
 }
@@ -513,9 +937,9 @@ class Arguments {
   Arguments() {
     args_.push_back(NULL);
   }
+
   ~Arguments() {
-    for (std::vector<char*>::iterator i = args_.begin();
-         i + 1 != args_.end();
+    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
          ++i) {
       free(*i);
     }
@@ -546,6 +970,22 @@ struct ExecDeathTestArgs {
   int close_fd;       // File descriptor to close; the read end of a pipe
 };
 
+#if GTEST_OS_MAC
+inline char** GetEnviron() {
+  // When Google Test is built as a framework on MacOS X, the environ variable
+  // is unavailable. Apple's documentation (man environ) recommends using
+  // _NSGetEnviron() instead.
+  return *_NSGetEnviron();
+}
+#else
+extern "C" char** environ;        // Some POSIX platforms expect you
+                                  // to declare environ. extern "C" makes
+                                  // it reside in the global namespace.
+inline char** GetEnviron() {
+  return environ;
+}
+#endif  // GTEST_OS_MAC
+
 // The main function for a threadsafe-style death test child process.
 // This function is called in a clone()-ed process and thus must avoid
 // any potentially unsafe operations like malloc or libc functions.
@@ -560,8 +1000,9 @@ static int ExecDeathTestChildMain(void* child_arg) {
       UnitTest::GetInstance()->original_working_dir();
   // We can safely call chdir() as it's a direct system call.
   if (chdir(original_dir) != 0) {
-    DeathTestAbort("chdir(\"%s\") failed: %s",
-                   original_dir, strerror(errno));
+    DeathTestAbort(String::Format("chdir(\"%s\") failed: %s",
+                                  original_dir,
+                                  GetLastSystemErrorMessage().c_str()));
     return EXIT_FAILURE;
   }
 
@@ -570,9 +1011,11 @@ static int ExecDeathTestChildMain(void* child_arg) {
   // unsafe.  Since execve() doesn't search the PATH, the user must
   // invoke the test program via a valid path that contains at least
   // one path separator.
-  execve(args->argv[0], args->argv, environ);
-  DeathTestAbort("execve(%s, ...) in %s failed: %s",
-                 args->argv[0], original_dir, strerror(errno));
+  execve(args->argv[0], args->argv, GetEnviron());
+  DeathTestAbort(String::Format("execve(%s, ...) in %s failed: %s",
+                                args->argv[0],
+                                original_dir,
+                                GetLastSystemErrorMessage().c_str()));
   return EXIT_FAILURE;
 }
 
@@ -581,12 +1024,12 @@ static int ExecDeathTestChildMain(void* child_arg) {
 // This could be accomplished more elegantly by a single recursive
 // function, but we want to guard against the unlikely possibility of
 // a smart compiler optimizing the recursion away.
-static bool StackLowerThanAddress(const void* ptr) {
+bool StackLowerThanAddress(const void* ptr) {
   int dummy;
   return &dummy < ptr;
 }
 
-static bool StackGrowsDown() {
+bool StackGrowsDown() {
   int dummy;
   return StackLowerThanAddress(&dummy);
 }
@@ -595,18 +1038,36 @@ static bool StackGrowsDown() {
 // that uses clone(2).  It dies with an error message if anything goes
 // wrong.
 static pid_t ExecDeathTestFork(char* const* argv, int close_fd) {
-  static const bool stack_grows_down = StackGrowsDown();
-  const size_t stack_size = getpagesize();
-  void* const stack = mmap(NULL, stack_size, PROT_READ | PROT_WRITE,
-                           MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-  GTEST_DEATH_TEST_CHECK_(stack != MAP_FAILED);
-  void* const stack_top =
-      static_cast<char*>(stack) + (stack_grows_down ? stack_size : 0);
   ExecDeathTestArgs args = { argv, close_fd };
-  const pid_t child_pid = clone(&ExecDeathTestChildMain, stack_top,
-                                SIGCHLD, &args);
+  pid_t child_pid;
+
+#if GTEST_HAS_CLONE
+  const bool use_fork = GTEST_FLAG(death_test_use_fork);
+
+  if (!use_fork) {
+    static const bool stack_grows_down = StackGrowsDown();
+    const size_t stack_size = getpagesize();
+    // MMAP_ANONYMOUS is not defined on Mac, so we use MAP_ANON instead.
+    void* const stack = mmap(NULL, stack_size, PROT_READ | PROT_WRITE,
+                             MAP_ANON | MAP_PRIVATE, -1, 0);
+    GTEST_DEATH_TEST_CHECK_(stack != MAP_FAILED);
+    void* const stack_top =
+        static_cast<char*>(stack) + (stack_grows_down ? stack_size : 0);
+
+    child_pid = clone(&ExecDeathTestChildMain, stack_top, SIGCHLD, &args);
+
+    GTEST_DEATH_TEST_CHECK_(munmap(stack, stack_size) != -1);
+  }
+#else
+  const bool use_fork = true;
+#endif  // GTEST_HAS_CLONE
+
+  if (use_fork && (child_pid = fork()) == 0) {
+      ExecDeathTestChildMain(&args);
+      _exit(0);
+  }
+
   GTEST_DEATH_TEST_CHECK_(child_pid != -1);
-  GTEST_DEATH_TEST_CHECK_(munmap(stack, stack_size) != -1);
   return child_pid;
 }
 
@@ -622,7 +1083,7 @@ DeathTest::TestRole ExecDeathTest::AssumeRole() {
   const int death_test_index = info->result()->death_test_count();
 
   if (flag != NULL) {
-    set_write_fd(flag->status_fd);
+    set_write_fd(flag->status_fd());
     return EXECUTE_TEST;
   }
 
@@ -634,19 +1095,18 @@ DeathTest::TestRole ExecDeathTest::AssumeRole() {
 
   const String filter_flag =
       String::Format("--%s%s=%s.%s",
-                     GTEST_FLAG_PREFIX, kFilterFlag,
+                     GTEST_FLAG_PREFIX_, kFilterFlag,
                      info->test_case_name(), info->name());
   const String internal_flag =
-      String::Format("--%s%s=%s:%d:%d:%d",
-                     GTEST_FLAG_PREFIX, kInternalRunDeathTestFlag, file_, line_,
-                     death_test_index, pipe_fd[1]);
+      String::Format("--%s%s=%s|%d|%d|%d",
+                     GTEST_FLAG_PREFIX_, kInternalRunDeathTestFlag,
+                     file_, line_, death_test_index, pipe_fd[1]);
   Arguments args;
   args.AddArguments(GetArgvs());
-  args.AddArgument("--logtostderr");
   args.AddArgument(filter_flag.c_str());
   args.AddArgument(internal_flag.c_str());
 
-  last_death_test_message = "";
+  DeathTest::set_last_death_test_message("");
 
   CaptureStderr();
   // See the comment in NoExecDeathTest::AssumeRole for why the next line
@@ -657,10 +1117,12 @@ DeathTest::TestRole ExecDeathTest::AssumeRole() {
   GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
   set_child_pid(child_pid);
   set_read_fd(pipe_fd[0]);
-  set_forked(true);
+  set_spawned(true);
   return OVERSEE_TEST;
 }
 
+#endif  // !GTEST_OS_WINDOWS
+
 // Creates a concrete DeathTest-derived class that depends on the
 // --gtest_death_test_style flag, and sets the pointer pointed to
 // by the "test" argument to its address.  If the test should be
@@ -676,28 +1138,36 @@ bool DefaultDeathTestFactory::Create(const char* statement, const RE* regex,
       ->increment_death_test_count();
 
   if (flag != NULL) {
-    if (death_test_index > flag->index) {
-      last_death_test_message = String::Format(
+    if (death_test_index > flag->index()) {
+      DeathTest::set_last_death_test_message(String::Format(
           "Death test count (%d) somehow exceeded expected maximum (%d)",
-          death_test_index, flag->index);
+          death_test_index, flag->index()));
       return false;
     }
 
-    if (!(flag->file == file && flag->line == line &&
-          flag->index == death_test_index)) {
+    if (!(flag->file() == file && flag->line() == line &&
+          flag->index() == death_test_index)) {
       *test = NULL;
       return true;
     }
   }
 
+#if GTEST_OS_WINDOWS
+  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
+      GTEST_FLAG(death_test_style) == "fast") {
+    *test = new WindowsDeathTest(statement, regex, file, line);
+  }
+#else
   if (GTEST_FLAG(death_test_style) == "threadsafe") {
     *test = new ExecDeathTest(statement, regex, file, line);
   } else if (GTEST_FLAG(death_test_style) == "fast") {
     *test = new NoExecDeathTest(statement, regex);
-  } else {
-    last_death_test_message = String::Format(
+  }
+#endif  // GTEST_OS_WINDOWS
+  else {  // NOLINT - this is more readable than unbalanced brackets inside #if.
+    DeathTest::set_last_death_test_message(String::Format(
         "Unknown death test style \"%s\" encountered",
-        GTEST_FLAG(death_test_style).c_str());
+        GTEST_FLAG(death_test_style).c_str()));
     return false;
   }
 
@@ -707,6 +1177,8 @@ bool DefaultDeathTestFactory::Create(const char* statement, const RE* regex,
 // Splits a given string on a given delimiter, populating a given
 // vector with the fields.  GTEST_HAS_DEATH_TEST implies that we have
 // ::std::string, so we can use it here.
+// TODO(vladl@google.com): Get rid of std::vector to be able to build on
+// Visual C++ 7.1 with exceptions disabled.
 static void SplitString(const ::std::string& str, char delimiter,
                         ::std::vector< ::std::string>* dest) {
   ::std::vector< ::std::string> parsed;
@@ -724,25 +1196,72 @@ static void SplitString(const ::std::string& str, char delimiter,
   dest->swap(parsed);
 }
 
-// Attempts to parse a string into a positive integer.  Returns true
-// if that is possible.  GTEST_HAS_DEATH_TEST implies that we have
-// ::std::string, so we can use it here.
-static bool ParsePositiveInt(const ::std::string& str, int* number) {
-  // Fail fast if the given string does not begin with a digit;
-  // this bypasses strtol's "optional leading whitespace and plus
-  // or minus sign" semantics, which are undesirable here.
-  if (str.empty() || !isdigit(str[0])) {
-    return false;
+#if GTEST_OS_WINDOWS
+// Recreates the pipe and event handles from the provided parameters,
+// signals the event, and returns a file descriptor wrapped around the pipe
+// handle. This function is called in the child process only.
+int GetStatusFileDescriptor(unsigned int parent_process_id,
+                            size_t status_handle_as_size_t,
+                            size_t event_handle_as_size_t) {
+  AutoHandle parent_process_handle(::OpenProcess(PROCESS_DUP_HANDLE,
+                                                   FALSE,  // Non-inheritable.
+                                                   parent_process_id));
+  if (parent_process_handle.Get() == INVALID_HANDLE_VALUE) {
+    DeathTestAbort(String::Format("Unable to open parent process %u",
+                                  parent_process_id));
   }
-  char* endptr;
-  const long parsed = strtol(str.c_str(), &endptr, 10);  // NOLINT
-  if (*endptr == '\0' && parsed <= INT_MAX) {
-    *number = static_cast<int>(parsed);
-    return true;
-  } else {
-    return false;
+
+  // TODO(vladl@google.com): Replace the following check with a
+  // compile-time assertion when available.
+  GTEST_CHECK_(sizeof(HANDLE) <= sizeof(size_t));
+
+  const HANDLE status_handle =
+      reinterpret_cast<HANDLE>(status_handle_as_size_t);
+  HANDLE dup_status_handle;
+
+  // The newly initialized handle is accessible only in in the parent
+  // process. To obtain one accessible within the child, we need to use
+  // DuplicateHandle.
+  if (!::DuplicateHandle(parent_process_handle.Get(), status_handle,
+                         ::GetCurrentProcess(), &dup_status_handle,
+                         0x0,    // Requested privileges ignored since
+                                 // DUPLICATE_SAME_ACCESS is used.
+                         FALSE,  // Request non-inheritable handler.
+                         DUPLICATE_SAME_ACCESS)) {
+    DeathTestAbort(String::Format(
+        "Unable to duplicate the pipe handle %Iu from the parent process %u",
+        status_handle_as_size_t, parent_process_id));
   }
+
+  const HANDLE event_handle = reinterpret_cast<HANDLE>(event_handle_as_size_t);
+  HANDLE dup_event_handle;
+
+  if (!::DuplicateHandle(parent_process_handle.Get(), event_handle,
+                         ::GetCurrentProcess(), &dup_event_handle,
+                         0x0,
+                         FALSE,
+                         DUPLICATE_SAME_ACCESS)) {
+    DeathTestAbort(String::Format(
+        "Unable to duplicate the event handle %Iu from the parent process %u",
+        event_handle_as_size_t, parent_process_id));
+  }
+
+  const int status_fd =
+      ::_open_osfhandle(reinterpret_cast<intptr_t>(dup_status_handle),
+                      O_APPEND | O_TEXT);
+  if (status_fd == -1) {
+    DeathTestAbort(String::Format(
+        "Unable to convert pipe handle %Iu to a file descriptor",
+        status_handle_as_size_t));
+  }
+
+  // Signals the parent that the write end of the pipe has been acquired
+  // so the parent can release its own write end.
+  ::SetEvent(dup_event_handle);
+
+  return status_fd;
 }
+#endif  // GTEST_OS_WINDOWS
 
 // Returns a newly created InternalRunDeathTestFlag object with fields
 // initialized from the GTEST_FLAG(internal_run_death_test) flag if
@@ -750,22 +1269,43 @@ static bool ParsePositiveInt(const ::std::string& str, int* number) {
 InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag() {
   if (GTEST_FLAG(internal_run_death_test) == "") return NULL;
 
-  InternalRunDeathTestFlag* const internal_run_death_test_flag =
-      new InternalRunDeathTestFlag;
   // GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we
   // can use it here.
+  int line = -1;
+  int index = -1;
   ::std::vector< ::std::string> fields;
-  SplitString(GTEST_FLAG(internal_run_death_test).c_str(), ':', &fields);
+  SplitString(GTEST_FLAG(internal_run_death_test).c_str(), '|', &fields);
+  int status_fd = -1;
+
+#if GTEST_OS_WINDOWS
+  unsigned int parent_process_id = 0;
+  size_t status_handle_as_size_t = 0;
+  size_t event_handle_as_size_t = 0;
+
+  if (fields.size() != 6
+      || !ParseNaturalNumber(fields[1], &line)
+      || !ParseNaturalNumber(fields[2], &index)
+      || !ParseNaturalNumber(fields[3], &parent_process_id)
+      || !ParseNaturalNumber(fields[4], &status_handle_as_size_t)
+      || !ParseNaturalNumber(fields[5], &event_handle_as_size_t)) {
+    DeathTestAbort(String::Format(
+        "Bad --gtest_internal_run_death_test flag: %s",
+        GTEST_FLAG(internal_run_death_test).c_str()));
+  }
+  status_fd = GetStatusFileDescriptor(parent_process_id,
+                                      status_handle_as_size_t,
+                                      event_handle_as_size_t);
+#else
   if (fields.size() != 4
-      || !ParsePositiveInt(fields[1], &internal_run_death_test_flag->line)
-      || !ParsePositiveInt(fields[2], &internal_run_death_test_flag->index)
-      || !ParsePositiveInt(fields[3],
-                           &internal_run_death_test_flag->status_fd)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: %s",
-                   GTEST_FLAG(internal_run_death_test).c_str());
-  }
-  internal_run_death_test_flag->file = fields[0].c_str();
-  return internal_run_death_test_flag;
+      || !ParseNaturalNumber(fields[1], &line)
+      || !ParseNaturalNumber(fields[2], &index)
+      || !ParseNaturalNumber(fields[3], &status_fd)) {
+    DeathTestAbort(String::Format(
+        "Bad --gtest_internal_run_death_test flag: %s",
+        GTEST_FLAG(internal_run_death_test).c_str()));
+  }
+#endif  // GTEST_OS_WINDOWS
+  return new InternalRunDeathTestFlag(fields[0], line, index, status_fd);
 }
 
 }  // namespace internal
diff --git a/utils/unittest/googletest/gtest-filepath.cc b/utils/unittest/googletest/gtest-filepath.cc
index 493ba0bfa7..07f828c914 100644
--- a/utils/unittest/googletest/gtest-filepath.cc
+++ b/utils/unittest/googletest/gtest-filepath.cc
@@ -36,21 +36,22 @@
 
 #ifdef _WIN32_WCE
 #include <windows.h>
-#elif defined(GTEST_OS_WINDOWS)
+#elif GTEST_OS_WINDOWS
 #include <direct.h>
 #include <io.h>
 #include <sys/stat.h>
-#elif defined(GTEST_OS_SYMBIAN)
+#elif GTEST_OS_SYMBIAN
 // Symbian OpenC has PATH_MAX in sys/syslimits.h
 #include <sys/syslimits.h>
 #include <unistd.h>
 #else
 #include <limits.h>
-#include <sys/stat.h>
-#include <unistd.h>
+#include <sys/stat.h>  // NOLINT
+#include <unistd.h>  // NOLINT
+#include <climits>  // Some Linux distributions define PATH_MAX here.
 #endif  // _WIN32_WCE or _WIN32
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 #define GTEST_PATH_MAX_ _MAX_PATH
 #elif defined(PATH_MAX)
 #define GTEST_PATH_MAX_ PATH_MAX
@@ -65,7 +66,7 @@
 namespace testing {
 namespace internal {
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 const char kPathSeparator = '\\';
 const char kPathSeparatorString[] = "\\";
 #ifdef _WIN32_WCE
@@ -90,7 +91,7 @@ FilePath FilePath::GetCurrentDir() {
 // Windows CE doesn't have a current directory, so we just return
 // something reasonable.
   return FilePath(kCurrentDirectoryString);
-#elif defined(GTEST_OS_WINDOWS)
+#elif GTEST_OS_WINDOWS
   char cwd[GTEST_PATH_MAX_ + 1] = {};
   return FilePath(_getcwd(cwd, sizeof(cwd)) == NULL ? "" : cwd);
 #else
@@ -144,19 +145,28 @@ FilePath FilePath::MakeFileName(const FilePath& directory,
                                 const FilePath& base_name,
                                 int number,
                                 const char* extension) {
-  FilePath dir(directory.RemoveTrailingPathSeparator());
-  if (number == 0) {
-    return FilePath(String::Format("%s%c%s.%s", dir.c_str(), kPathSeparator,
-                                   base_name.c_str(), extension));
-  }
-  return FilePath(String::Format("%s%c%s_%d.%s", dir.c_str(), kPathSeparator,
-                                 base_name.c_str(), number, extension));
+  const FilePath file_name(
+      (number == 0) ?
+      String::Format("%s.%s", base_name.c_str(), extension) :
+      String::Format("%s_%d.%s", base_name.c_str(), number, extension));
+  return ConcatPaths(directory, file_name);
+}
+
+// Given directory = "dir", relative_path = "test.xml", returns "dir/test.xml".
+// On Windows, uses \ as the separator rather than /.
+FilePath FilePath::ConcatPaths(const FilePath& directory,
+                               const FilePath& relative_path) {
+  if (directory.IsEmpty())
+    return relative_path;
+  const FilePath dir(directory.RemoveTrailingPathSeparator());
+  return FilePath(String::Format("%s%c%s", dir.c_str(), kPathSeparator,
+                                 relative_path.c_str()));
 }
 
 // Returns true if pathname describes something findable in the file-system,
 // either a file, directory, or whatever.
 bool FilePath::FileOrDirectoryExists() const {
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 #ifdef _WIN32_WCE
   LPCWSTR unicode = String::AnsiToUtf16(pathname_.c_str());
   const DWORD attributes = GetFileAttributes(unicode);
@@ -176,7 +186,7 @@ bool FilePath::FileOrDirectoryExists() const {
 // that exists.
 bool FilePath::DirectoryExists() const {
   bool result = false;
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
   // Don't strip off trailing separator if path is a root directory on
   // Windows (like "C:\\").
   const FilePath& path(IsRootDirectory() ? *this :
@@ -205,15 +215,27 @@ bool FilePath::DirectoryExists() const {
 // Returns true if pathname describes a root directory. (Windows has one
 // root directory per disk drive.)
 bool FilePath::IsRootDirectory() const {
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
+  // TODO(wan@google.com): on Windows a network share like
+  // \\server\share can be a root directory, although it cannot be the
+  // current directory.  Handle this properly.
+  return pathname_.GetLength() == 3 && IsAbsolutePath();
+#else
+  return pathname_ == kPathSeparatorString;
+#endif
+}
+
+// Returns true if pathname describes an absolute path.
+bool FilePath::IsAbsolutePath() const {
   const char* const name = pathname_.c_str();
-  return pathname_.GetLength() == 3 &&
+#if GTEST_OS_WINDOWS
+  return pathname_.GetLength() >= 3 &&
      ((name[0] >= 'a' && name[0] <= 'z') ||
       (name[0] >= 'A' && name[0] <= 'Z')) &&
      name[1] == ':' &&
      name[2] == kPathSeparator;
 #else
-  return pathname_ == kPathSeparatorString;
+  return name[0] == kPathSeparator;
 #endif
 }
 
@@ -264,7 +286,7 @@ bool FilePath::CreateDirectoriesRecursively() const {
 // directory for any reason, including if the parent directory does not
 // exist. Not named "CreateDirectory" because that's a macro on Windows.
 bool FilePath::CreateFolder() const {
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 #ifdef _WIN32_WCE
   FilePath removed_sep(this->RemoveTrailingPathSeparator());
   LPCWSTR unicode = String::AnsiToUtf16(removed_sep.c_str());
diff --git a/utils/unittest/googletest/gtest-port.cc b/utils/unittest/googletest/gtest-port.cc
index 9878cae05d..abc7149168 100644
--- a/utils/unittest/googletest/gtest-port.cc
+++ b/utils/unittest/googletest/gtest-port.cc
@@ -35,9 +35,16 @@
 #include <stdlib.h>
 #include <stdio.h>
 
-#ifdef GTEST_HAS_DEATH_TEST
-#include <regex.h>
-#endif  // GTEST_HAS_DEATH_TEST
+#if GTEST_OS_WINDOWS
+#include <io.h>
+#include <sys/stat.h>
+#else
+#include <unistd.h>
+#endif  // GTEST_OS_WINDOWS
+
+#if GTEST_USES_SIMPLE_RE
+#include <string.h>
+#endif
 
 #ifdef _WIN32_WCE
 #include <windows.h>  // For TerminateProcess()
@@ -47,11 +54,26 @@
 #include <gtest/gtest-message.h>
 #include <gtest/internal/gtest-string.h>
 
+// Indicates that this translation unit is part of Google Test's
+// implementation.  It must come before gtest-internal-inl.h is
+// included, or there will be a compiler error.  This trick is to
+// prevent a user from accidentally including gtest-internal-inl.h in
+// his code.
+#define GTEST_IMPLEMENTATION_ 1
+#include "gtest/internal/gtest-internal-inl.h"
+#undef GTEST_IMPLEMENTATION_
 
 namespace testing {
 namespace internal {
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_OS_WINDOWS
+// Microsoft does not provide a definition of STDERR_FILENO.
+const int kStdErrFileno = 2;
+#else
+const int kStdErrFileno = STDERR_FILENO;
+#endif  // GTEST_OS_WINDOWS
+
+#if GTEST_USES_POSIX_RE
 
 // Implements RE.  Currently only needed for death tests.
 
@@ -93,7 +115,13 @@ void RE::Init(const char* regex) {
   // previous expression returns false.  Otherwise partial_regex_ may
   // not be properly initialized can may cause trouble when it's
   // freed.
-  is_valid_ = (regcomp(&partial_regex_, regex, REG_EXTENDED) == 0) && is_valid_;
+  //
+  // Some implementation of POSIX regex (e.g. on at least some
+  // versions of Cygwin) doesn't accept the empty string as a valid
+  // regex.  We change it to an equivalent form "()" to be safe.
+  const char* const partial_regex = (*regex == '\0') ? "()" : regex;
+  is_valid_ = (regcomp(&partial_regex_, partial_regex, REG_EXTENDED) == 0)
+      && is_valid_;
   EXPECT_TRUE(is_valid_)
       << "Regular expression \"" << regex
       << "\" is not a valid POSIX Extended regular expression.";
@@ -101,7 +129,262 @@ void RE::Init(const char* regex) {
   delete[] full_pattern;
 }
 
-#endif  // GTEST_HAS_DEATH_TEST
+#elif GTEST_USES_SIMPLE_RE
+
+// Returns true iff ch appears anywhere in str (excluding the
+// terminating '\0' character).
+bool IsInSet(char ch, const char* str) {
+  return ch != '\0' && strchr(str, ch) != NULL;
+}
+
+// Returns true iff ch belongs to the given classification.  Unlike
+// similar functions in <ctype.h>, these aren't affected by the
+// current locale.
+bool IsDigit(char ch) { return '0' <= ch && ch <= '9'; }
+bool IsPunct(char ch) {
+  return IsInSet(ch, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~");
+}
+bool IsRepeat(char ch) { return IsInSet(ch, "?*+"); }
+bool IsWhiteSpace(char ch) { return IsInSet(ch, " \f\n\r\t\v"); }
+bool IsWordChar(char ch) {
+  return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') ||
+      ('0' <= ch && ch <= '9') || ch == '_';
+}
+
+// Returns true iff "\\c" is a supported escape sequence.
+bool IsValidEscape(char c) {
+  return (IsPunct(c) || IsInSet(c, "dDfnrsStvwW"));
+}
+
+// Returns true iff the given atom (specified by escaped and pattern)
+// matches ch.  The result is undefined if the atom is invalid.
+bool AtomMatchesChar(bool escaped, char pattern_char, char ch) {
+  if (escaped) {  // "\\p" where p is pattern_char.
+    switch (pattern_char) {
+      case 'd': return IsDigit(ch);
+      case 'D': return !IsDigit(ch);
+      case 'f': return ch == '\f';
+      case 'n': return ch == '\n';
+      case 'r': return ch == '\r';
+      case 's': return IsWhiteSpace(ch);
+      case 'S': return !IsWhiteSpace(ch);
+      case 't': return ch == '\t';
+      case 'v': return ch == '\v';
+      case 'w': return IsWordChar(ch);
+      case 'W': return !IsWordChar(ch);
+    }
+    return IsPunct(pattern_char) && pattern_char == ch;
+  }
+
+  return (pattern_char == '.' && ch != '\n') || pattern_char == ch;
+}
+
+// Helper function used by ValidateRegex() to format error messages.
+String FormatRegexSyntaxError(const char* regex, int index) {
+  return (Message() << "Syntax error at index " << index
+          << " in simple regular expression \"" << regex << "\": ").GetString();
+}
+
+// Generates non-fatal failures and returns false if regex is invalid;
+// otherwise returns true.
+bool ValidateRegex(const char* regex) {
+  if (regex == NULL) {
+    // TODO(wan@google.com): fix the source file location in the
+    // assertion failures to match where the regex is used in user
+    // code.
+    ADD_FAILURE() << "NULL is not a valid simple regular expression.";
+    return false;
+  }
+
+  bool is_valid = true;
+
+  // True iff ?, *, or + can follow the previous atom.
+  bool prev_repeatable = false;
+  for (int i = 0; regex[i]; i++) {
+    if (regex[i] == '\\') {  // An escape sequence
+      i++;
+      if (regex[i] == '\0') {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
+                      << "'\\' cannot appear at the end.";
+        return false;
+      }
+
+      if (!IsValidEscape(regex[i])) {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
+                      << "invalid escape sequence \"\\" << regex[i] << "\".";
+        is_valid = false;
+      }
+      prev_repeatable = true;
+    } else {  // Not an escape sequence.
+      const char ch = regex[i];
+
+      if (ch == '^' && i > 0) {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
+                      << "'^' can only appear at the beginning.";
+        is_valid = false;
+      } else if (ch == '$' && regex[i + 1] != '\0') {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
+                      << "'$' can only appear at the end.";
+        is_valid = false;
+      } else if (IsInSet(ch, "()[]{}|")) {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
+                      << "'" << ch << "' is unsupported.";
+        is_valid = false;
+      } else if (IsRepeat(ch) && !prev_repeatable) {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
+                      << "'" << ch << "' can only follow a repeatable token.";
+        is_valid = false;
+      }
+
+      prev_repeatable = !IsInSet(ch, "^$?*+");
+    }
+  }
+
+  return is_valid;
+}
+
+// Matches a repeated regex atom followed by a valid simple regular
+// expression.  The regex atom is defined as c if escaped is false,
+// or \c otherwise.  repeat is the repetition meta character (?, *,
+// or +).  The behavior is undefined if str contains too many
+// characters to be indexable by size_t, in which case the test will
+// probably time out anyway.  We are fine with this limitation as
+// std::string has it too.
+bool MatchRepetitionAndRegexAtHead(
+    bool escaped, char c, char repeat, const char* regex,
+    const char* str) {
+  const size_t min_count = (repeat == '+') ? 1 : 0;
+  const size_t max_count = (repeat == '?') ? 1 :
+      static_cast<size_t>(-1) - 1;
+  // We cannot call numeric_limits::max() as it conflicts with the
+  // max() macro on Windows.
+
+  for (size_t i = 0; i <= max_count; ++i) {
+    // We know that the atom matches each of the first i characters in str.
+    if (i >= min_count && MatchRegexAtHead(regex, str + i)) {
+      // We have enough matches at the head, and the tail matches too.
+      // Since we only care about *whether* the pattern matches str
+      // (as opposed to *how* it matches), there is no need to find a
+      // greedy match.
+      return true;
+    }
+    if (str[i] == '\0' || !AtomMatchesChar(escaped, c, str[i]))
+      return false;
+  }
+  return false;
+}
+
+// Returns true iff regex matches a prefix of str.  regex must be a
+// valid simple regular expression and not start with "^", or the
+// result is undefined.
+bool MatchRegexAtHead(const char* regex, const char* str) {
+  if (*regex == '\0')  // An empty regex matches a prefix of anything.
+    return true;
+
+  // "$" only matches the end of a string.  Note that regex being
+  // valid guarantees that there's nothing after "$" in it.
+  if (*regex == '$')
+    return *str == '\0';
+
+  // Is the first thing in regex an escape sequence?
+  const bool escaped = *regex == '\\';
+  if (escaped)
+    ++regex;
+  if (IsRepeat(regex[1])) {
+    // MatchRepetitionAndRegexAtHead() calls MatchRegexAtHead(), so
+    // here's an indirect recursion.  It terminates as the regex gets
+    // shorter in each recursion.
+    return MatchRepetitionAndRegexAtHead(
+        escaped, regex[0], regex[1], regex + 2, str);
+  } else {
+    // regex isn't empty, isn't "$", and doesn't start with a
+    // repetition.  We match the first atom of regex with the first
+    // character of str and recurse.
+    return (*str != '\0') && AtomMatchesChar(escaped, *regex, *str) &&
+        MatchRegexAtHead(regex + 1, str + 1);
+  }
+}
+
+// Returns true iff regex matches any substring of str.  regex must be
+// a valid simple regular expression, or the result is undefined.
+//
+// The algorithm is recursive, but the recursion depth doesn't exceed
+// the regex length, so we won't need to worry about running out of
+// stack space normally.  In rare cases the time complexity can be
+// exponential with respect to the regex length + the string length,
+// but usually it's must faster (often close to linear).
+bool MatchRegexAnywhere(const char* regex, const char* str) {
+  if (regex == NULL || str == NULL)
+    return false;
+
+  if (*regex == '^')
+    return MatchRegexAtHead(regex + 1, str);
+
+  // A successful match can be anywhere in str.
+  do {
+    if (MatchRegexAtHead(regex, str))
+      return true;
+  } while (*str++ != '\0');
+  return false;
+}
+
+// Implements the RE class.
+
+RE::~RE() {
+  free(const_cast<char*>(pattern_));
+  free(const_cast<char*>(full_pattern_));
+}
+
+// Returns true iff regular expression re matches the entire str.
+bool RE::FullMatch(const char* str, const RE& re) {
+  return re.is_valid_ && MatchRegexAnywhere(re.full_pattern_, str);
+}
+
+// Returns true iff regular expression re matches a substring of str
+// (including str itself).
+bool RE::PartialMatch(const char* str, const RE& re) {
+  return re.is_valid_ && MatchRegexAnywhere(re.pattern_, str);
+}
+
+// Initializes an RE from its string representation.
+void RE::Init(const char* regex) {
+  pattern_ = full_pattern_ = NULL;
+  if (regex != NULL) {
+#if GTEST_OS_WINDOWS
+    pattern_ = _strdup(regex);
+#else
+    pattern_ = strdup(regex);
+#endif
+  }
+
+  is_valid_ = ValidateRegex(regex);
+  if (!is_valid_) {
+    // No need to calculate the full pattern when the regex is invalid.
+    return;
+  }
+
+  const size_t len = strlen(regex);
+  // Reserves enough bytes to hold the regular expression used for a
+  // full match: we need space to prepend a '^', append a '$', and
+  // terminate the string with '\0'.
+  char* buffer = static_cast<char*>(malloc(len + 3));
+  full_pattern_ = buffer;
+
+  if (*regex != '^')
+    *buffer++ = '^';  // Makes sure full_pattern_ starts with '^'.
+
+  // We don't use snprintf or strncpy, as they trigger a warning when
+  // compiled with VC++ 8.0.
+  memcpy(buffer, regex, len);
+  buffer += len;
+
+  if (len == 0 || regex[len - 1] != '$')
+    *buffer++ = '$';  // Makes sure full_pattern_ ends with '$'.
+
+  *buffer = '\0';
+}
+
+#endif  // GTEST_USES_POSIX_RE
 
 // Logs a message at the given severity level.
 void GTestLog(GTestLogSeverity severity, const char* file,
@@ -112,11 +395,19 @@ void GTestLog(GTestLogSeverity severity, const char* file,
       severity == GTEST_ERROR ?   "[ ERROR ]" : "[ FATAL ]";
   fprintf(stderr, "\n%s %s:%d: %s\n", marker, file, line, msg);
   if (severity == GTEST_FATAL) {
+    fflush(NULL);  // abort() is not guaranteed to flush open file streams.
     abort();
   }
 }
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_STD_STRING
+
+// Disable Microsoft deprecation warnings for POSIX functions called from
+// this class (creat, dup, dup2, and close)
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4996)
+#endif  // _MSC_VER
 
 // Defines the stderr capturer.
 
@@ -124,16 +415,26 @@ class CapturedStderr {
  public:
   // The ctor redirects stderr to a temporary file.
   CapturedStderr() {
-    uncaptured_fd_ = dup(STDERR_FILENO);
+    uncaptured_fd_ = dup(kStdErrFileno);
 
+#if GTEST_OS_WINDOWS
+    char temp_dir_path[MAX_PATH + 1] = { '\0' };  // NOLINT
+    char temp_file_path[MAX_PATH + 1] = { '\0' };  // NOLINT
+
+    ::GetTempPathA(sizeof(temp_dir_path), temp_dir_path);
+    ::GetTempFileNameA(temp_dir_path, "gtest_redir", 0, temp_file_path);
+    const int captured_fd = creat(temp_file_path, _S_IREAD | _S_IWRITE);
+    filename_ = temp_file_path;
+#else
     // There's no guarantee that a test has write access to the
     // current directory, so we create the temporary file in the /tmp
     // directory instead.
     char name_template[] = "/tmp/captured_stderr.XXXXXX";
     const int captured_fd = mkstemp(name_template);
     filename_ = name_template;
+#endif  // GTEST_OS_WINDOWS
     fflush(NULL);
-    dup2(captured_fd, STDERR_FILENO);
+    dup2(captured_fd, kStdErrFileno);
     close(captured_fd);
   }
 
@@ -145,7 +446,7 @@ class CapturedStderr {
   void StopCapture() {
     // Restores the original stream.
     fflush(NULL);
-    dup2(uncaptured_fd_, STDERR_FILENO);
+    dup2(uncaptured_fd_, kStdErrFileno);
     close(uncaptured_fd_);
     uncaptured_fd_ = -1;
   }
@@ -160,6 +461,10 @@ class CapturedStderr {
   ::std::string filename_;
 };
 
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif  // _MSC_VER
+
 static CapturedStderr* g_captured_stderr = NULL;
 
 // Returns the size (in bytes) of a file.
@@ -169,8 +474,6 @@ static size_t GetFileSize(FILE * file) {
 }
 
 // Reads the entire content of a file as a string.
-// GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we can
-// use it here.
 static ::std::string ReadEntireFile(FILE * file) {
   const size_t file_size = GetFileSize(file);
   char* const buffer = new char[file_size];
@@ -206,9 +509,18 @@ void CaptureStderr() {
 // use it here.
 ::std::string GetCapturedStderr() {
   g_captured_stderr->StopCapture();
+
+// Disables Microsoft deprecation warning for fopen and fclose.
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4996)
+#endif  // _MSC_VER
   FILE* const file = fopen(g_captured_stderr->filename().c_str(), "r");
   const ::std::string content = ReadEntireFile(file);
   fclose(file);
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif  // _MSC_VER
 
   delete g_captured_stderr;
   g_captured_stderr = NULL;
@@ -216,6 +528,10 @@ void CaptureStderr() {
   return content;
 }
 
+#endif  // GTEST_HAS_STD_STRING
+
+#if GTEST_HAS_DEATH_TEST
+
 // A copy of all command line arguments.  Set by InitGoogleTest().
 ::std::vector<String> g_argvs;
 
@@ -235,7 +551,8 @@ void abort() {
 // given flag.  For example, FlagToEnvVar("foo") will return
 // "GTEST_FOO" in the open-source version.
 static String FlagToEnvVar(const char* flag) {
-  const String full_flag = (Message() << GTEST_FLAG_PREFIX << flag).GetString();
+  const String full_flag =
+      (Message() << GTEST_FLAG_PREFIX_ << flag).GetString();
 
   Message env_var;
   for (int i = 0; i != full_flag.GetLength(); i++) {
@@ -245,17 +562,6 @@ static String FlagToEnvVar(const char* flag) {
   return env_var.GetString();
 }
 
-// Reads and returns the Boolean environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-//
-// The value is considered true iff it's not "0".
-bool BoolFromGTestEnv(const char* flag, bool default_value) {
-  const String env_var = FlagToEnvVar(flag);
-  const char* const string_value = GetEnv(env_var.c_str());
-  return string_value == NULL ?
-      default_value : strcmp(string_value, "0") != 0;
-}
-
 // Parses 'str' for a 32-bit signed integer.  If successful, writes
 // the result to *value and returns true; otherwise leaves *value
 // unchanged and returns false.
@@ -297,6 +603,17 @@ bool ParseInt32(const Message& src_text, const char* str, Int32* value) {
   return true;
 }
 
+// Reads and returns the Boolean environment variable corresponding to
+// the given flag; if it's not set, returns default_value.
+//
+// The value is considered true iff it's not "0".
+bool BoolFromGTestEnv(const char* flag, bool default_value) {
+  const String env_var = FlagToEnvVar(flag);
+  const char* const string_value = GetEnv(env_var.c_str());
+  return string_value == NULL ?
+      default_value : strcmp(string_value, "0") != 0;
+}
+
 // Reads and returns a 32-bit integer stored in the environment
 // variable corresponding to the given flag; if it isn't set or
 // doesn't represent a valid 32-bit integer, returns default_value.
diff --git a/utils/unittest/googletest/gtest-test-part.cc b/utils/unittest/googletest/gtest-test-part.cc
index 2e80f21d38..0f0116bfe9 100644
--- a/utils/unittest/googletest/gtest-test-part.cc
+++ b/utils/unittest/googletest/gtest-test-part.cc
@@ -38,9 +38,9 @@
 // included, or there will be a compiler error.  This trick is to
 // prevent a user from accidentally including gtest-internal-inl.h in
 // his code.
-#define GTEST_IMPLEMENTATION
+#define GTEST_IMPLEMENTATION_ 1
 #include "gtest/internal/gtest-internal-inl.h"
-#undef GTEST_IMPLEMENTATION
+#undef GTEST_IMPLEMENTATION_
 
 namespace testing {
 
diff --git a/utils/unittest/googletest/gtest-typed-test.cc b/utils/unittest/googletest/gtest-typed-test.cc
index d42a1596d5..e45e2abb56 100644
--- a/utils/unittest/googletest/gtest-typed-test.cc
+++ b/utils/unittest/googletest/gtest-typed-test.cc
@@ -35,7 +35,7 @@
 namespace testing {
 namespace internal {
 
-#ifdef GTEST_HAS_TYPED_TEST_P
+#if GTEST_HAS_TYPED_TEST_P
 
 // Verifies that registered_tests match the test names in
 // defined_test_names_; returns registered_tests if successful, or
@@ -85,6 +85,7 @@ const char* TypedTestCasePState::VerifyRegisteredTestNames(
   if (errors_str != "") {
     fprintf(stderr, "%s %s", FormatFileLocation(file, line).c_str(),
             errors_str.c_str());
+    fflush(stderr);
     abort();
   }
 
diff --git a/utils/unittest/googletest/gtest.cc b/utils/unittest/googletest/gtest.cc
index b5a654f18b..8f4252dad4 100644
--- a/utils/unittest/googletest/gtest.cc
+++ b/utils/unittest/googletest/gtest.cc
@@ -43,11 +43,11 @@
 #include <wchar.h>
 #include <wctype.h>
 
-#ifdef GTEST_OS_LINUX
+#if GTEST_OS_LINUX
 
 // TODO(kenton@google.com): Use autoconf to detect availability of
 // gettimeofday().
-#define GTEST_HAS_GETTIMEOFDAY
+#define GTEST_HAS_GETTIMEOFDAY_ 1
 
 #include <fcntl.h>
 #include <limits.h>
@@ -60,22 +60,22 @@
 #include <string>
 #include <vector>
 
-#elif defined(GTEST_OS_SYMBIAN)
-#define GTEST_HAS_GETTIMEOFDAY
+#elif GTEST_OS_SYMBIAN
+#define GTEST_HAS_GETTIMEOFDAY_ 1
 #include <sys/time.h>  // NOLINT
 
-#elif defined(GTEST_OS_ZOS)
-#define GTEST_HAS_GETTIMEOFDAY
+#elif GTEST_OS_ZOS
+#define GTEST_HAS_GETTIMEOFDAY_ 1
 #include <sys/time.h>  // NOLINT
 
 // On z/OS we additionally need strings.h for strcasecmp.
-#include <strings.h>
+#include <strings.h>  // NOLINT
 
 #elif defined(_WIN32_WCE)  // We are on Windows CE.
 
 #include <windows.h>  // NOLINT
 
-#elif defined(GTEST_OS_WINDOWS)  // We are on Windows proper.
+#elif GTEST_OS_WINDOWS  // We are on Windows proper.
 
 #include <io.h>  // NOLINT
 #include <sys/timeb.h>  // NOLINT
@@ -89,9 +89,9 @@
 // TODO(kenton@google.com): There are other ways to get the time on
 //   Windows, like GetTickCount() or GetSystemTimeAsFileTime().  MinGW
 //   supports these.  consider using them instead.
-#define GTEST_HAS_GETTIMEOFDAY
+#define GTEST_HAS_GETTIMEOFDAY_ 1
 #include <sys/time.h>  // NOLINT
-#endif
+#endif  // defined(__MINGW__) || defined(__MINGW32__)
 
 // cpplint thinks that the header is already included, so we want to
 // silence it.
@@ -102,13 +102,17 @@
 // Assume other platforms have gettimeofday().
 // TODO(kenton@google.com): Use autoconf to detect availability of
 //   gettimeofday().
-#define GTEST_HAS_GETTIMEOFDAY
+#define GTEST_HAS_GETTIMEOFDAY_ 1
 
 // cpplint thinks that the header is already included, so we want to
 // silence it.
 #include <sys/time.h>  // NOLINT
 #include <unistd.h>  // NOLINT
 
+#endif  // GTEST_OS_LINUX
+
+#if GTEST_HAS_EXCEPTIONS
+#include <stdexcept>
 #endif
 
 // Indicates that this translation unit is part of Google Test's
@@ -116,11 +120,11 @@
 // included, or there will be a compiler error.  This trick is to
 // prevent a user from accidentally including gtest-internal-inl.h in
 // his code.
-#define GTEST_IMPLEMENTATION
+#define GTEST_IMPLEMENTATION_ 1
 #include "gtest/internal/gtest-internal-inl.h"
-#undef GTEST_IMPLEMENTATION
+#undef GTEST_IMPLEMENTATION_
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 #define fileno _fileno
 #define isatty _isatty
 #define vsnprintf _vsnprintf
@@ -145,6 +149,13 @@ static const char kUniversalFilter[] = "*";
 // The default output file for XML output.
 static const char kDefaultOutputFile[] = "test_detail.xml";
 
+// The environment variable name for the test shard index.
+static const char kTestShardIndex[] = "GTEST_SHARD_INDEX";
+// The environment variable name for the total number of test shards.
+static const char kTestTotalShards[] = "GTEST_TOTAL_SHARDS";
+// The environment variable name for the test shard status file.
+static const char kTestShardStatusFile[] = "GTEST_SHARD_STATUS_FILE";
+
 namespace internal {
 
 // The text used in failure messages to indicate the start of the
@@ -154,6 +165,11 @@ const char kStackTraceMarker[] = "\nStack trace:\n";
 }  // namespace internal
 
 GTEST_DEFINE_bool_(
+    also_run_disabled_tests,
+    internal::BoolFromGTestEnv("also_run_disabled_tests", false),
+    "Run disabled tests too, in addition to the tests normally being run.");
+
+GTEST_DEFINE_bool_(
     break_on_failure,
     internal::BoolFromGTestEnv("break_on_failure", false),
     "True iff a failed assertion should be a debugger break-point.");
@@ -161,7 +177,7 @@ GTEST_DEFINE_bool_(
 GTEST_DEFINE_bool_(
     catch_exceptions,
     internal::BoolFromGTestEnv("catch_exceptions", false),
-    "True iff " GTEST_NAME
+    "True iff " GTEST_NAME_
     " should catch exceptions and treat them as test failures.");
 
 GTEST_DEFINE_string_(
@@ -199,7 +215,7 @@ GTEST_DEFINE_string_(
 GTEST_DEFINE_bool_(
     print_time,
     internal::BoolFromGTestEnv("print_time", false),
-    "True iff " GTEST_NAME
+    "True iff " GTEST_NAME_
     " should display elapsed time in text output.");
 
 GTEST_DEFINE_int32_(
@@ -216,11 +232,22 @@ GTEST_DEFINE_int32_(
 
 GTEST_DEFINE_bool_(
     show_internal_stack_frames, false,
-    "True iff " GTEST_NAME " should include internal stack frames when "
+    "True iff " GTEST_NAME_ " should include internal stack frames when "
     "printing test failure stack traces.");
 
+GTEST_DEFINE_bool_(
+    throw_on_failure,
+    internal::BoolFromGTestEnv("throw_on_failure", false),
+    "When this flag is specified, a failed assertion will throw an exception "
+    "if exceptions are enabled or exit the program with a non-zero code "
+    "otherwise.");
+
 namespace internal {
 
+// g_help_flag is true iff the --help flag or an equivalent form is
+// specified on the command line.
+static bool g_help_flag = false;
+
 // GTestIsInitialized() returns true iff the user has initialized
 // Google Test.  Useful for catching the user mistake of not initializing
 // Google Test before calling RUN_ALL_TESTS().
@@ -290,7 +317,7 @@ String g_executable_path;
 FilePath GetCurrentExecutableName() {
   FilePath result;
 
-#if defined(_WIN32_WCE) || defined(GTEST_OS_WINDOWS)
+#if defined(_WIN32_WCE) || GTEST_OS_WINDOWS
   result.Set(FilePath(g_executable_path).RemoveExtension("exe"));
 #else
   result.Set(FilePath(g_executable_path));
@@ -314,16 +341,28 @@ String UnitTestOptions::GetOutputFormat() {
 
 // Returns the name of the requested output file, or the default if none
 // was explicitly specified.
-String UnitTestOptions::GetOutputFile() {
+String UnitTestOptions::GetAbsolutePathToOutputFile() {
   const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
   if (gtest_output_flag == NULL)
     return String("");
 
   const char* const colon = strchr(gtest_output_flag, ':');
   if (colon == NULL)
-    return String(kDefaultOutputFile);
+    return String(internal::FilePath::ConcatPaths(
+               internal::FilePath(
+                   UnitTest::GetInstance()->original_working_dir()),
+               internal::FilePath(kDefaultOutputFile)).ToString() );
 
   internal::FilePath output_name(colon + 1);
+  if (!output_name.IsAbsolutePath())
+    // TODO(wan@google.com): on Windows \some\path is not an absolute
+    // path (as its meaning depends on the current drive), yet the
+    // following logic for turning it into an absolute path is wrong.
+    // Fix it.
+    output_name = internal::FilePath::ConcatPaths(
+        internal::FilePath(UnitTest::GetInstance()->original_working_dir()),
+        internal::FilePath(colon + 1));
+
   if (!output_name.IsDirectory())
     return output_name.ToString();
 
@@ -357,7 +396,7 @@ bool UnitTestOptions::PatternMatchesString(const char *pattern,
 
 bool UnitTestOptions::MatchesFilter(const String& name, const char* filter) {
   const char *cur_pattern = filter;
-  while (true) {
+  for (;;) {
     if (PatternMatchesString(cur_pattern, name.c_str())) {
       return true;
     }
@@ -409,7 +448,7 @@ bool UnitTestOptions::FilterMatchesTest(const String &test_case_name,
           !MatchesFilter(full_name, negative.c_str()));
 }
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 // Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
 // given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
 // This function is useful as an __except condition.
@@ -719,7 +758,7 @@ static TimeInMillis GetTimeInMillis() {
     return now_int64.QuadPart;
   }
   return 0;
-#elif defined(GTEST_OS_WINDOWS) && !defined(GTEST_HAS_GETTIMEOFDAY)
+#elif GTEST_OS_WINDOWS && !GTEST_HAS_GETTIMEOFDAY_
   __timeb64 now;
 #ifdef _MSC_VER
   // MSVC 8 deprecates _ftime64(), so we want to suppress warning 4996
@@ -734,7 +773,7 @@ static TimeInMillis GetTimeInMillis() {
   _ftime64(&now);
 #endif  // _MSC_VER
   return static_cast<TimeInMillis>(now.time) * 1000 + now.millitm;
-#elif defined(GTEST_HAS_GETTIMEOFDAY)
+#elif GTEST_HAS_GETTIMEOFDAY_
   struct timeval now;
   gettimeofday(&now, NULL);
   return static_cast<TimeInMillis>(now.tv_sec) * 1000 + now.tv_usec / 1000;
@@ -769,7 +808,7 @@ static char* CloneString(const char* str, size_t length) {
     char* const clone = new char[length + 1];
     // MSVC 8 deprecates strncpy(), so we want to suppress warning
     // 4996 (deprecated function) there.
-#ifdef GTEST_OS_WINDOWS  // We are on Windows.
+#if GTEST_OS_WINDOWS  // We are on Windows.
 #pragma warning(push)          // Saves the current warning state.
 #pragma warning(disable:4996)  // Temporarily disables warning 4996.
     strncpy(clone, str, length);
@@ -1290,7 +1329,7 @@ AssertionResult IsNotSubstring(
 
 namespace internal {
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 
 namespace {
 
@@ -1418,14 +1457,14 @@ char* CodePointToUtf8(UInt32 code_point, char* str) {
     // null-terminate the destination string.
     // MSVC 8 deprecates strncpy(), so we want to suppress warning
     // 4996 (deprecated function) there.
-#ifdef GTEST_OS_WINDOWS  // We are on Windows.
+#if GTEST_OS_WINDOWS  // We are on Windows.
 #pragma warning(push)          // Saves the current warning state.
 #pragma warning(disable:4996)  // Temporarily disables warning 4996.
 #endif
     strncpy(str, String::Format("(Invalid Unicode 0x%X)", code_point).c_str(),
             32);
-#ifdef GTEST_OS_WINDOWS  // We are on Windows.
-#pragma warning(pop)           // Restores the warning state.
+#if GTEST_OS_WINDOWS  // We are on Windows.
+#pragma warning(pop)  // Restores the warning state.
 #endif
     str[31] = '\0';  // Makes sure no change in the format to strncpy leaves
                      // the result unterminated.
@@ -1441,23 +1480,19 @@ char* CodePointToUtf8(UInt32 code_point, char* str) {
 // and thus should be combined into a single Unicode code point
 // using CreateCodePointFromUtf16SurrogatePair.
 inline bool IsUtf16SurrogatePair(wchar_t first, wchar_t second) {
-  if (sizeof(wchar_t) == 2)
-    return (first & 0xFC00) == 0xD800 && (second & 0xFC00) == 0xDC00;
-  else
-    return false;
+  return sizeof(wchar_t) == 2 &&
+      (first & 0xFC00) == 0xD800 && (second & 0xFC00) == 0xDC00;
 }
 
 // Creates a Unicode code point from UTF16 surrogate pair.
 inline UInt32 CreateCodePointFromUtf16SurrogatePair(wchar_t first,
                                                     wchar_t second) {
-  if (sizeof(wchar_t) == 2) {
-    const UInt32 mask = (1 << 10) - 1;
-    return (((first & mask) << 10) | (second & mask)) + 0x10000;
-  } else {
-    // This should not be called, but we provide a sensible default
-    // in case it is.
-    return static_cast<UInt32>(first);
-  }
+  const UInt32 mask = (1 << 10) - 1;
+  return (sizeof(wchar_t) == 2) ?
+      (((first & mask) << 10) | (second & mask)) + 0x10000 :
+      // This function should not be called when the condition is
+      // false, but we provide a sensible default in case it is.
+      static_cast<UInt32>(first);
 }
 
 // Converts a wide string to a narrow string in UTF-8 encoding.
@@ -1572,7 +1607,7 @@ bool String::CaseInsensitiveCStringEquals(const char * lhs, const char * rhs) {
 
   if ( rhs == NULL ) return false;
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
   return _stricmp(lhs, rhs) == 0;
 #else  // GTEST_OS_WINDOWS
   return strcasecmp(lhs, rhs) == 0;
@@ -1597,9 +1632,9 @@ bool String::CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
 
   if ( rhs == NULL ) return false;
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
   return _wcsicmp(lhs, rhs) == 0;
-#elif defined(GTEST_OS_LINUX)
+#elif GTEST_OS_LINUX
   return wcscasecmp(lhs, rhs) == 0;
 #else
   // Mac OS X and Cygwin don't define wcscasecmp.  Other unknown OSes
@@ -1610,7 +1645,7 @@ bool String::CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
     right = towlower(*rhs++);
   } while (left && left == right);
   return left == right;
-#endif // OS selector
+#endif  // OS selector
 }
 
 // Constructs a String by copying a given number of chars from a
@@ -1700,7 +1735,7 @@ String String::Format(const char * format, ...) {
   char buffer[4096];
   // MSVC 8 deprecates vsnprintf(), so we want to suppress warning
   // 4996 (deprecated function) there.
-#ifdef GTEST_OS_WINDOWS  // We are on Windows.
+#if GTEST_OS_WINDOWS  // We are on Windows.
 #pragma warning(push)          // Saves the current warning state.
 #pragma warning(disable:4996)  // Temporarily disables warning 4996.
   const int size =
@@ -1807,7 +1842,7 @@ bool TestResult::ValidateTestProperty(const TestProperty& test_property) {
         << "Reserved key used in RecordProperty(): "
         << key
         << " ('name', 'status', 'time', and 'classname' are reserved by "
-        << GTEST_NAME << ")";
+        << GTEST_NAME_ << ")";
     return false;
   }
   return true;
@@ -1897,7 +1932,7 @@ void Test::RecordProperty(const char* key, int value) {
   RecordProperty(key, value_message.GetString().c_str());
 }
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 // We are on Windows.
 
 // Adds an "exception thrown" fatal failure to the current test.
@@ -1993,7 +2028,7 @@ void Test::Run() {
   if (!HasSameFixtureClass()) return;
 
   internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-#if defined(GTEST_OS_WINDOWS) && !defined(__MINGW32__)
+#if GTEST_OS_WINDOWS && !defined(__MINGW32__)
   // We are on Windows.
   impl->os_stack_trace_getter()->UponLeavingGTest();
   __try {
@@ -2102,7 +2137,7 @@ TestInfo* MakeAndRegisterTestInfo(
   return test_info;
 }
 
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
 void ReportInvalidTestCaseType(const char* test_case_name,
                                const char* file, int line) {
   Message errors;
@@ -2201,7 +2236,7 @@ namespace internal {
 // and INSTANTIATE_TEST_CASE_P into regular tests and registers those.
 // This will be done just once during the program runtime.
 void UnitTestImpl::RegisterParameterizedTests() {
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
   if (!parameterized_tests_registered_) {
     parameterized_test_registry_.RegisterTests();
     parameterized_tests_registered_ = true;
@@ -2227,7 +2262,7 @@ void TestInfoImpl::Run() {
   const TimeInMillis start = GetTimeInMillis();
 
   impl->os_stack_trace_getter()->UponLeavingGTest();
-#if defined(GTEST_OS_WINDOWS) && !defined(__MINGW32__)
+#if GTEST_OS_WINDOWS && !defined(__MINGW32__)
   // We are on Windows.
   Test* test = NULL;
 
@@ -2418,14 +2453,20 @@ static const char * TestPartResultTypeToString(TestPartResultType type) {
   return "Unknown result type";
 }
 
+// Prints a TestPartResult to a String.
+static internal::String PrintTestPartResultToString(
+    const TestPartResult& test_part_result) {
+  return (Message()
+          << internal::FormatFileLocation(test_part_result.file_name(),
+                                          test_part_result.line_number())
+          << " " << TestPartResultTypeToString(test_part_result.type())
+          << test_part_result.message()).GetString();
+}
+
 // Prints a TestPartResult.
 static void PrintTestPartResult(
-    const TestPartResult & test_part_result) {
-  printf("%s %s%s\n",
-         internal::FormatFileLocation(test_part_result.file_name(),
-                                      test_part_result.line_number()).c_str(),
-         TestPartResultTypeToString(test_part_result.type()),
-         test_part_result.message());
+    const TestPartResult& test_part_result) {
+  printf("%s\n", PrintTestPartResultToString(test_part_result).c_str());
   fflush(stdout);
 }
 
@@ -2434,12 +2475,13 @@ static void PrintTestPartResult(
 namespace internal {
 
 enum GTestColor {
+  COLOR_DEFAULT,
   COLOR_RED,
   COLOR_GREEN,
   COLOR_YELLOW
 };
 
-#if defined(GTEST_OS_WINDOWS) && !defined(_WIN32_WCE)
+#if GTEST_OS_WINDOWS && !defined(_WIN32_WCE)
 
 // Returns the character attribute for the given color.
 WORD GetColorAttribute(GTestColor color) {
@@ -2447,20 +2489,21 @@ WORD GetColorAttribute(GTestColor color) {
     case COLOR_RED:    return FOREGROUND_RED;
     case COLOR_GREEN:  return FOREGROUND_GREEN;
     case COLOR_YELLOW: return FOREGROUND_RED | FOREGROUND_GREEN;
+    default:           return 0;
   }
-  return 0;
 }
 
 #else
 
-// Returns the ANSI color code for the given color.
+// Returns the ANSI color code for the given color.  COLOR_DEFAULT is
+// an invalid input.
 const char* GetAnsiColorCode(GTestColor color) {
   switch (color) {
     case COLOR_RED:     return "1";
     case COLOR_GREEN:   return "2";
     case COLOR_YELLOW:  return "3";
+    default:            return NULL;
   };
-  return NULL;
 }
 
 #endif  // GTEST_OS_WINDOWS && !_WIN32_WCE
@@ -2470,7 +2513,7 @@ bool ShouldUseColor(bool stdout_is_tty) {
   const char* const gtest_color = GTEST_FLAG(color).c_str();
 
   if (String::CaseInsensitiveCStringEquals(gtest_color, "auto")) {
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
     // On Windows the TERM variable is usually not set, but the
     // console there does support colors.
     return stdout_is_tty;
@@ -2502,11 +2545,13 @@ void ColoredPrintf(GTestColor color, const char* fmt, ...) {
   va_list args;
   va_start(args, fmt);
 
-#if defined(_WIN32_WCE) || defined(GTEST_OS_SYMBIAN) || defined(GTEST_OS_ZOS)
-  static const bool use_color = false;
+#if defined(_WIN32_WCE) || GTEST_OS_SYMBIAN || GTEST_OS_ZOS
+  const bool use_color = false;
 #else
-  static const bool use_color = ShouldUseColor(isatty(fileno(stdout)) != 0);
-#endif  // !_WIN32_WCE
+  static const bool in_color_mode =
+      ShouldUseColor(isatty(fileno(stdout)) != 0);
+  const bool use_color = in_color_mode && (color != COLOR_DEFAULT);
+#endif  // defined(_WIN32_WCE) || GTEST_OS_SYMBIAN || GTEST_OS_ZOS
   // The '!= 0' comparison is necessary to satisfy MSVC 7.1.
 
   if (!use_color) {
@@ -2515,7 +2560,7 @@ void ColoredPrintf(GTestColor color, const char* fmt, ...) {
     return;
   }
 
-#if defined(GTEST_OS_WINDOWS) && !defined(_WIN32_WCE)
+#if GTEST_OS_WINDOWS && !defined(_WIN32_WCE)
   const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
 
   // Gets the current text color.
@@ -2533,13 +2578,14 @@ void ColoredPrintf(GTestColor color, const char* fmt, ...) {
   printf("\033[0;3%sm", GetAnsiColorCode(color));
   vprintf(fmt, args);
   printf("\033[m");  // Resets the terminal to default.
-#endif  // GTEST_OS_WINDOWS && !_WIN32_WCE
+#endif  // GTEST_OS_WINDOWS && !defined(_WIN32_WCE)
   va_end(args);
 }
 
 }  // namespace internal
 
 using internal::ColoredPrintf;
+using internal::COLOR_DEFAULT;
 using internal::COLOR_RED;
 using internal::COLOR_GREEN;
 using internal::COLOR_YELLOW;
@@ -2579,7 +2625,14 @@ void PrettyUnitTestResultPrinter::OnUnitTestStart(
   // tests may be skipped.
   if (!internal::String::CStringEquals(filter, kUniversalFilter)) {
     ColoredPrintf(COLOR_YELLOW,
-                  "Note: %s filter = %s\n", GTEST_NAME, filter);
+                  "Note: %s filter = %s\n", GTEST_NAME_, filter);
+  }
+
+  if (internal::ShouldShard(kTestTotalShards, kTestShardIndex, false)) {
+    ColoredPrintf(COLOR_YELLOW,
+                  "Note: This is test shard %s of %s.\n",
+                  internal::GetEnv(kTestShardIndex),
+                  internal::GetEnv(kTestTotalShards));
   }
 
   const internal::UnitTestImpl* const impl = unit_test->impl();
@@ -2736,7 +2789,7 @@ void PrettyUnitTestResultPrinter::OnUnitTestEnd(
   }
 
   int num_disabled = impl->disabled_test_count();
-  if (num_disabled) {
+  if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
     if (!num_failures) {
       printf("\n");  // Add a spacer if no FAILURE banner is displayed.
     }
@@ -2899,7 +2952,7 @@ void XmlUnitTestResultPrinter::OnUnitTestEnd(const UnitTest* unit_test) {
   if (output_dir.CreateDirectoriesRecursively()) {
   // MSVC 8 deprecates fopen(), so we want to suppress warning 4996
   // (deprecated function) there.
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
   // We are on Windows.
 #pragma warning(push)          // Saves the current warning state.
 #pragma warning(disable:4996)  // Temporarily disables warning 4996.
@@ -3164,7 +3217,7 @@ void OsStackTraceGetter::UponLeavingGTest() {
 
 const char* const
 OsStackTraceGetter::kElidedFramesMarker =
-    "... " GTEST_NAME " internal frames ...";
+    "... " GTEST_NAME_ " internal frames ...";
 
 }  // namespace internal
 
@@ -3213,6 +3266,19 @@ Environment* UnitTest::AddEnvironment(Environment* env) {
   return env;
 }
 
+#if GTEST_HAS_EXCEPTIONS
+// A failed Google Test assertion will throw an exception of this type
+// when exceptions are enabled.  We derive it from std::runtime_error,
+// which is for errors presumably detectable only at run time.  Since
+// std::runtime_error inherits from std::exception, many testing
+// frameworks know how to extract and print the message inside it.
+class GoogleTestFailureException : public ::std::runtime_error {
+ public:
+  explicit GoogleTestFailureException(const TestPartResult& failure)
+      : runtime_error(PrintTestPartResultToString(failure).c_str()) {}
+};
+#endif
+
 // Adds a TestPartResult to the current TestResult object.  All Google Test
 // assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc) eventually call
 // this to report their results.  The user code should use the
@@ -3228,7 +3294,7 @@ void UnitTest::AddTestPartResult(TestPartResultType result_type,
 
   internal::MutexLock lock(&mutex_);
   if (impl_->gtest_trace_stack()->size() > 0) {
-    msg << "\n" << GTEST_NAME << " trace:";
+    msg << "\n" << GTEST_NAME_ << " trace:";
 
     for (internal::ListNode<internal::TraceInfo>* node =
          impl_->gtest_trace_stack()->Head();
@@ -3249,11 +3315,23 @@ void UnitTest::AddTestPartResult(TestPartResultType result_type,
   impl_->GetTestPartResultReporterForCurrentThread()->
       ReportTestPartResult(result);
 
-  // If this is a failure and the user wants the debugger to break on
-  // failures ...
-  if (result_type != TPRT_SUCCESS && GTEST_FLAG(break_on_failure)) {
-    // ... then we generate a seg fault.
-    *static_cast<int*>(NULL) = 1;
+  if (result_type != TPRT_SUCCESS) {
+    // gunit_break_on_failure takes precedence over
+    // gunit_throw_on_failure.  This allows a user to set the latter
+    // in the code (perhaps in order to use Google Test assertions
+    // with another testing framework) and specify the former on the
+    // command line for debugging.
+    if (GTEST_FLAG(break_on_failure)) {
+      *static_cast<int*>(NULL) = 1;
+    } else if (GTEST_FLAG(throw_on_failure)) {
+#if GTEST_HAS_EXCEPTIONS
+      throw GoogleTestFailureException(result);
+#else
+      // We cannot call abort() as it generates a pop-up in debug mode
+      // that cannot be suppressed in VC 7.1 or below.
+      exit(1);
+#endif
+    }
   }
 }
 
@@ -3271,19 +3349,48 @@ void UnitTest::RecordPropertyForCurrentTest(const char* key,
 // We don't protect this under mutex_, as we only support calling it
 // from the main thread.
 int UnitTest::Run() {
-#if defined(GTEST_OS_WINDOWS) && !defined(__MINGW32__)
-
+#if GTEST_OS_WINDOWS && !defined(__MINGW32__)
+
+  const bool in_death_test_child_process =
+      internal::GTEST_FLAG(internal_run_death_test).GetLength() > 0;
+
+  // Either the user wants Google Test to catch exceptions thrown by the
+  // tests or this is executing in the context of death test child
+  // process. In either case the user does not want to see pop-up dialogs
+  // about crashes - they are expected..
+  if (GTEST_FLAG(catch_exceptions) || in_death_test_child_process) {
+  // process. In either case the user does not want to see pop-up dialogs
+  // about crashes - they are expected..
+  if (GTEST_FLAG(catch_exceptions) || in_death_test_child_process) {
 #if !defined(_WIN32_WCE)
-  // SetErrorMode doesn't exist on CE.
-  if (GTEST_FLAG(catch_exceptions)) {
-    // The user wants Google Test to catch exceptions thrown by the tests.
-
-    // This lets fatal errors be handled by us, instead of causing pop-ups.
+    // SetErrorMode doesn't exist on CE.
     SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOALIGNMENTFAULTEXCEPT |
                  SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX);
-  }
 #endif  // _WIN32_WCE
 
+    // Death test children can be terminated with _abort().  On Windows,
+    // _abort() can show a dialog with a warning message.  This forces the
+    // abort message to go to stderr instead.
+    _set_error_mode(_OUT_TO_STDERR);
+
+    // In the debug version, Visual Studio pops up a separate dialog
+    // offering a choice to debug the aborted program. We need to suppress
+    // this dialog or it will pop up for every EXPECT/ASSERT_DEATH statement
+    // executed. Google Test will notify the user of any unexpected
+    // failure via stderr.
+#if _MSC_VER >= 1400
+    // VC++ doesn't define _set_abort_behavior() prior to the version 8.0.
+    // Users of prior VC versions shall suffer the agony and pain of
+    // clicking through the countless debug dialogs.
+    // TODO(vladl@google.com): find a way to suppress the abort dialog() in the
+    // debug mode when compiled with VC 7.1 or lower.
+    if (!GTEST_FLAG(break_on_failure))
+      _set_abort_behavior(
+          0x0,                                    // Clear the following flags:
+          _WRITE_ABORT_MSG | _CALL_REPORTFAULT);  // pop-up window, core dump.
+#endif  // _MSC_VER >= 1400
+  }
+
   __try {
     return impl_->RunAllTests();
   } __except(internal::UnitTestOptions::GTestShouldProcessSEH(
@@ -3322,7 +3429,7 @@ const TestInfo* UnitTest::current_test_info() const {
   return impl_->current_test_info();
 }
 
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
 // Returns ParameterizedTestCaseRegistry object used to keep track of
 // value-parameterized tests and instantiate and register them.
 // L < mutex_
@@ -3377,7 +3484,7 @@ UnitTestImpl::UnitTestImpl(UnitTest* parent)
       per_thread_test_part_result_reporter_(
           &default_per_thread_test_part_result_reporter_),
       test_cases_(),
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
       parameterized_test_registry_(),
       parameterized_tests_registered_(false),
 #endif  // GTEST_HAS_PARAM_TEST
@@ -3387,7 +3494,7 @@ UnitTestImpl::UnitTestImpl(UnitTest* parent)
       ad_hoc_test_result_(),
       result_printer_(NULL),
       os_stack_trace_getter_(NULL),
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
       elapsed_time_(0),
       internal_run_death_test_flag_(NULL),
       death_test_factory_(new DefaultDeathTestFactory) {
@@ -3495,8 +3602,17 @@ int UnitTestImpl::RunAllTests() {
     return 1;
   }
 
+  // Do not run any test if the --help flag was specified.
+  if (g_help_flag)
+    return 0;
+
   RegisterParameterizedTests();
 
+  // Even if sharding is not on, test runners may want to use the
+  // GTEST_SHARD_STATUS_FILE to query whether the test supports the sharding
+  // protocol.
+  internal::WriteToShardStatusFileIfNeeded();
+
   // Lists all the tests and exits if the --gtest_list_tests
   // flag was specified.
   if (GTEST_FLAG(list_tests)) {
@@ -3508,16 +3624,22 @@ int UnitTestImpl::RunAllTests() {
   // death test.
   bool in_subprocess_for_death_test = false;
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
   internal_run_death_test_flag_.reset(ParseInternalRunDeathTestFlag());
   in_subprocess_for_death_test = (internal_run_death_test_flag_.get() != NULL);
 #endif  // GTEST_HAS_DEATH_TEST
 
   UnitTestEventListenerInterface * const printer = result_printer();
 
+  const bool should_shard = ShouldShard(kTestTotalShards, kTestShardIndex,
+                                        in_subprocess_for_death_test);
+
   // Compares the full test names with the filter to decide which
   // tests to run.
-  const bool has_tests_to_run = FilterTests() > 0;
+  const bool has_tests_to_run = FilterTests(should_shard
+                                              ? HONOR_SHARDING_PROTOCOL
+                                              : IGNORE_SHARDING_PROTOCOL) > 0;
+
   // True iff at least one test has failed.
   bool failed = false;
 
@@ -3573,14 +3695,128 @@ int UnitTestImpl::RunAllTests() {
   return failed ? 1 : 0;
 }
 
+// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
+// if the variable is present. If a file already exists at this location, this
+// function will write over it. If the variable is present, but the file cannot
+// be created, prints an error and exits.
+void WriteToShardStatusFileIfNeeded() {
+  const char* const test_shard_file = GetEnv(kTestShardStatusFile);
+  if (test_shard_file != NULL) {
+#ifdef _MSC_VER  // MSVC 8 deprecates fopen().
+#pragma warning(push)          // Saves the current warning state.
+#pragma warning(disable:4996)  // Temporarily disables warning on
+                               // deprecated functions.
+#endif
+    FILE* const file = fopen(test_shard_file, "w");
+#ifdef _MSC_VER
+#pragma warning(pop)           // Restores the warning state.
+#endif
+    if (file == NULL) {
+      ColoredPrintf(COLOR_RED,
+                    "Could not write to the test shard status file \"%s\" "
+                    "specified by the %s environment variable.\n",
+                    test_shard_file, kTestShardStatusFile);
+      fflush(stdout);
+      exit(EXIT_FAILURE);
+    }
+    fclose(file);
+  }
+}
+
+// Checks whether sharding is enabled by examining the relevant
+// environment variable values. If the variables are present,
+// but inconsistent (i.e., shard_index >= total_shards), prints
+// an error and exits. If in_subprocess_for_death_test, sharding is
+// disabled because it must only be applied to the original test
+// process. Otherwise, we could filter out death tests we intended to execute.
+bool ShouldShard(const char* total_shards_env,
+                 const char* shard_index_env,
+                 bool in_subprocess_for_death_test) {
+  if (in_subprocess_for_death_test) {
+    return false;
+  }
+
+  const Int32 total_shards = Int32FromEnvOrDie(total_shards_env, -1);
+  const Int32 shard_index = Int32FromEnvOrDie(shard_index_env, -1);
+
+  if (total_shards == -1 && shard_index == -1) {
+    return false;
+  } else if (total_shards == -1 && shard_index != -1) {
+    const Message msg = Message()
+      << "Invalid environment variables: you have "
+      << kTestShardIndex << " = " << shard_index
+      << ", but have left " << kTestTotalShards << " unset.\n";
+    ColoredPrintf(COLOR_RED, msg.GetString().c_str());
+    fflush(stdout);
+    exit(EXIT_FAILURE);
+  } else if (total_shards != -1 && shard_index == -1) {
+    const Message msg = Message()
+      << "Invalid environment variables: you have "
+      << kTestTotalShards << " = " << total_shards
+      << ", but have left " << kTestShardIndex << " unset.\n";
+    ColoredPrintf(COLOR_RED, msg.GetString().c_str());
+    fflush(stdout);
+    exit(EXIT_FAILURE);
+  } else if (shard_index < 0 || shard_index >= total_shards) {
+    const Message msg = Message()
+      << "Invalid environment variables: we require 0 <= "
+      << kTestShardIndex << " < " << kTestTotalShards
+      << ", but you have " << kTestShardIndex << "=" << shard_index
+      << ", " << kTestTotalShards << "=" << total_shards << ".\n";
+    ColoredPrintf(COLOR_RED, msg.GetString().c_str());
+    fflush(stdout);
+    exit(EXIT_FAILURE);
+  }
+
+  return total_shards > 1;
+}
+
+// Parses the environment variable var as an Int32. If it is unset,
+// returns default_val. If it is not an Int32, prints an error
+// and aborts.
+Int32 Int32FromEnvOrDie(const char* const var, Int32 default_val) {
+  const char* str_val = GetEnv(var);
+  if (str_val == NULL) {
+    return default_val;
+  }
+
+  Int32 result;
+  if (!ParseInt32(Message() << "The value of environment variable " << var,
+                  str_val, &result)) {
+    exit(EXIT_FAILURE);
+  }
+  return result;
+}
+
+// Given the total number of shards, the shard index, and the test id,
+// returns true iff the test should be run on this shard. The test id is
+// some arbitrary but unique non-negative integer assigned to each test
+// method. Assumes that 0 <= shard_index < total_shards.
+bool ShouldRunTestOnShard(int total_shards, int shard_index, int test_id) {
+  return (test_id % total_shards) == shard_index;
+}
+
 // Compares the name of each test with the user-specified filter to
 // decide whether the test should be run, then records the result in
 // each TestCase and TestInfo object.
+// If shard_tests == true, further filters tests based on sharding
+// variables in the environment - see
+// http://code.google.com/p/googletest/wiki/GoogleTestAdvancedGuide.
 // Returns the number of tests that should run.
-int UnitTestImpl::FilterTests() {
+int UnitTestImpl::FilterTests(ReactionToSharding shard_tests) {
+  const Int32 total_shards = shard_tests == HONOR_SHARDING_PROTOCOL ?
+      Int32FromEnvOrDie(kTestTotalShards, -1) : -1;
+  const Int32 shard_index = shard_tests == HONOR_SHARDING_PROTOCOL ?
+      Int32FromEnvOrDie(kTestShardIndex, -1) : -1;
+
+  // num_runnable_tests are the number of tests that will
+  // run across all shards (i.e., match filter and are not disabled).
+  // num_selected_tests are the number of tests to be run on
+  // this shard.
   int num_runnable_tests = 0;
+  int num_selected_tests = 0;
   for (const internal::ListNode<TestCase *> *test_case_node =
-       test_cases_.Head();
+           test_cases_.Head();
        test_case_node != NULL;
        test_case_node = test_case_node->next()) {
     TestCase * const test_case = test_case_node->element();
@@ -3588,7 +3824,7 @@ int UnitTestImpl::FilterTests() {
     test_case->set_should_run(false);
 
     for (const internal::ListNode<TestInfo *> *test_info_node =
-           test_case->test_info_list().Head();
+             test_case->test_info_list().Head();
          test_info_node != NULL;
          test_info_node = test_info_node->next()) {
       TestInfo * const test_info = test_info_node->element();
@@ -3596,23 +3832,30 @@ int UnitTestImpl::FilterTests() {
       // A test is disabled if test case name or test name matches
       // kDisableTestFilter.
       const bool is_disabled =
-        internal::UnitTestOptions::MatchesFilter(test_case_name,
-                                                 kDisableTestFilter) ||
-        internal::UnitTestOptions::MatchesFilter(test_name,
-                                                 kDisableTestFilter);
+          internal::UnitTestOptions::MatchesFilter(test_case_name,
+                                                   kDisableTestFilter) ||
+          internal::UnitTestOptions::MatchesFilter(test_name,
+                                                   kDisableTestFilter);
       test_info->impl()->set_is_disabled(is_disabled);
 
-      const bool should_run = !is_disabled &&
+      const bool is_runnable =
+          (GTEST_FLAG(also_run_disabled_tests) || !is_disabled) &&
           internal::UnitTestOptions::FilterMatchesTest(test_case_name,
                                                        test_name);
-      test_info->impl()->set_should_run(should_run);
-      test_case->set_should_run(test_case->should_run() || should_run);
-      if (should_run) {
-        num_runnable_tests++;
-      }
+
+      const bool is_selected = is_runnable &&
+          (shard_tests == IGNORE_SHARDING_PROTOCOL ||
+           ShouldRunTestOnShard(total_shards, shard_index,
+                                num_runnable_tests));
+
+      num_runnable_tests += is_runnable;
+      num_selected_tests += is_selected;
+
+      test_info->impl()->set_should_run(is_selected);
+      test_case->set_should_run(test_case->should_run() || is_selected);
     }
   }
-  return num_runnable_tests;
+  return num_selected_tests;
 }
 
 // Lists all tests by name.
@@ -3658,7 +3901,7 @@ UnitTestEventListenerInterface* UnitTestImpl::result_printer() {
     return result_printer_;
   }
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
   if (internal_run_death_test_flag_.get() != NULL) {
     result_printer_ = new NullUnitTestResultPrinter;
     return result_printer_;
@@ -3669,7 +3912,7 @@ UnitTestEventListenerInterface* UnitTestImpl::result_printer() {
   const String& output_format = internal::UnitTestOptions::GetOutputFormat();
   if (output_format == "xml") {
     repeater->AddListener(new XmlUnitTestResultPrinter(
-        internal::UnitTestOptions::GetOutputFile().c_str()));
+        internal::UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
   } else if (output_format != "") {
       printf("WARNING: unrecognized output format \"%s\" ignored.\n",
              output_format.c_str());
@@ -3757,6 +4000,22 @@ int GetFailedPartCount(const TestResult* result) {
   return result->failed_part_count();
 }
 
+// Used by the GTEST_HIDE_UNREACHABLE_CODE_ macro to suppress unreachable
+// code warnings.
+namespace {
+class ClassUniqueToAlwaysTrue {};
+}
+
+bool AlwaysTrue() {
+#if GTEST_HAS_EXCEPTIONS
+  // This condition is always false so AlwaysTrue() never actually throws,
+  // but it makes the compiler think that it may throw.
+  if (atoi("42") == 36)  // NOLINT
+    throw ClassUniqueToAlwaysTrue();
+#endif  // GTEST_HAS_EXCEPTIONS
+  return true;
+}
+
 // Parses a string as a command line flag.  The string should have
 // the format "--flag=value".  When def_optional is true, the "=value"
 // part can be omitted.
@@ -3768,8 +4027,8 @@ const char* ParseFlagValue(const char* str,
   // str and flag must not be NULL.
   if (str == NULL || flag == NULL) return NULL;
 
-  // The flag must start with "--" followed by GTEST_FLAG_PREFIX.
-  const String flag_str = String::Format("--%s%s", GTEST_FLAG_PREFIX, flag);
+  // The flag must start with "--" followed by GTEST_FLAG_PREFIX_.
+  const String flag_str = String::Format("--%s%s", GTEST_FLAG_PREFIX_, flag);
   const size_t flag_len = flag_str.GetLength();
   if (strncmp(str, flag_str.c_str(), flag_len) != 0) return NULL;
 
@@ -3846,6 +4105,102 @@ bool ParseStringFlag(const char* str, const char* flag, String* value) {
   return true;
 }
 
+// Prints a string containing code-encoded text.  The following escape
+// sequences can be used in the string to control the text color:
+//
+//   @@    prints a single '@' character.
+//   @R    changes the color to red.
+//   @G    changes the color to green.
+//   @Y    changes the color to yellow.
+//   @D    changes to the default terminal text color.
+//
+// TODO(wan@google.com): Write tests for this once we add stdout
+// capturing to Google Test.
+static void PrintColorEncoded(const char* str) {
+  GTestColor color = COLOR_DEFAULT;  // The current color.
+
+  // Conceptually, we split the string into segments divided by escape
+  // sequences.  Then we print one segment at a time.  At the end of
+  // each iteration, the str pointer advances to the beginning of the
+  // next segment.
+  for (;;) {
+    const char* p = strchr(str, '@');
+    if (p == NULL) {
+      ColoredPrintf(color, "%s", str);
+      return;
+    }
+
+    ColoredPrintf(color, "%s", String(str, p - str).c_str());
+
+    const char ch = p[1];
+    str = p + 2;
+    if (ch == '@') {
+      ColoredPrintf(color, "@");
+    } else if (ch == 'D') {
+      color = COLOR_DEFAULT;
+    } else if (ch == 'R') {
+      color = COLOR_RED;
+    } else if (ch == 'G') {
+      color = COLOR_GREEN;
+    } else if (ch == 'Y') {
+      color = COLOR_YELLOW;
+    } else {
+      --str;
+    }
+  }
+}
+
+static const char kColorEncodedHelpMessage[] =
+"This program contains tests written using " GTEST_NAME_ ". You can use the\n"
+"following command line flags to control its behavior:\n"
+"\n"
+"Test Selection:\n"
+"  @G--" GTEST_FLAG_PREFIX_ "list_tests@D\n"
+"      List the names of all tests instead of running them. The name of\n"
+"      TEST(Foo, Bar) is \"Foo.Bar\".\n"
+"  @G--" GTEST_FLAG_PREFIX_ "filter=@YPOSTIVE_PATTERNS"
+    "[@G-@YNEGATIVE_PATTERNS]@D\n"
+"      Run only the tests whose name matches one of the positive patterns but\n"
+"      none of the negative patterns. '?' matches any single character; '*'\n"
+"      matches any substring; ':' separates two patterns.\n"
+"  @G--" GTEST_FLAG_PREFIX_ "also_run_disabled_tests@D\n"
+"      Run all disabled tests too.\n"
+"  @G--" GTEST_FLAG_PREFIX_ "repeat=@Y[COUNT]@D\n"
+"      Run the tests repeatedly; use a negative count to repeat forever.\n"
+"\n"
+"Test Output:\n"
+"  @G--" GTEST_FLAG_PREFIX_ "color=@Y(@Gyes@Y|@Gno@Y|@Gauto@Y)@D\n"
+"      Enable/disable colored output. The default is @Gauto@D.\n"
+"  -@G-" GTEST_FLAG_PREFIX_ "print_time@D\n"
+"      Print the elapsed time of each test.\n"
+"  @G--" GTEST_FLAG_PREFIX_ "output=xml@Y[@G:@YDIRECTORY_PATH@G"
+    GTEST_PATH_SEP_ "@Y|@G:@YFILE_PATH]@D\n"
+"      Generate an XML report in the given directory or with the given file\n"
+"      name. @YFILE_PATH@D defaults to @Gtest_details.xml@D.\n"
+"\n"
+"Failure Behavior:\n"
+"  @G--" GTEST_FLAG_PREFIX_ "break_on_failure@D\n"
+"      Turn assertion failures into debugger break-points.\n"
+"  @G--" GTEST_FLAG_PREFIX_ "throw_on_failure@D\n"
+"      Turn assertion failures into C++ exceptions.\n"
+#if GTEST_OS_WINDOWS
+"  @G--" GTEST_FLAG_PREFIX_ "catch_exceptions@D\n"
+"      Suppress pop-ups caused by exceptions.\n"
+#endif  // GTEST_OS_WINDOWS
+"\n"
+"Except for @G--" GTEST_FLAG_PREFIX_ "list_tests@D, you can alternatively set "
+    "the corresponding\n"
+"environment variable of a flag (all letters in upper-case). For example, to\n"
+"print the elapsed time, you can either specify @G--" GTEST_FLAG_PREFIX_
+    "print_time@D or set the\n"
+"@G" GTEST_FLAG_PREFIX_UPPER_ "PRINT_TIME@D environment variable to a "
+    "non-zero value.\n"
+"\n"
+"For more information, please read the " GTEST_NAME_ " documentation at\n"
+"@G" GTEST_PROJECT_URL_ "@D. If you find a bug in " GTEST_NAME_ "\n"
+"(not one in your own code or tests), please report it to\n"
+"@G<" GTEST_DEV_EMAIL_ ">@D.\n";
+
 // Parses the command line for Google Test flags, without initializing
 // other parts of Google Test.  The type parameter CharType can be
 // instantiated to either char or wchar_t.
@@ -3860,20 +4215,25 @@ void ParseGoogleTestFlagsOnlyImpl(int* argc, CharType** argv) {
     using internal::ParseStringFlag;
 
     // Do we see a Google Test flag?
-    if (ParseBoolFlag(arg, kBreakOnFailureFlag,
+    if (ParseBoolFlag(arg, kAlsoRunDisabledTestsFlag,
+                      &GTEST_FLAG(also_run_disabled_tests)) ||
+        ParseBoolFlag(arg, kBreakOnFailureFlag,
                       &GTEST_FLAG(break_on_failure)) ||
         ParseBoolFlag(arg, kCatchExceptionsFlag,
                       &GTEST_FLAG(catch_exceptions)) ||
         ParseStringFlag(arg, kColorFlag, &GTEST_FLAG(color)) ||
         ParseStringFlag(arg, kDeathTestStyleFlag,
                         &GTEST_FLAG(death_test_style)) ||
+        ParseBoolFlag(arg, kDeathTestUseFork,
+                      &GTEST_FLAG(death_test_use_fork)) ||
         ParseStringFlag(arg, kFilterFlag, &GTEST_FLAG(filter)) ||
         ParseStringFlag(arg, kInternalRunDeathTestFlag,
                         &GTEST_FLAG(internal_run_death_test)) ||
         ParseBoolFlag(arg, kListTestsFlag, &GTEST_FLAG(list_tests)) ||
         ParseStringFlag(arg, kOutputFlag, &GTEST_FLAG(output)) ||
         ParseBoolFlag(arg, kPrintTimeFlag, &GTEST_FLAG(print_time)) ||
-        ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat))
+        ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
+        ParseBoolFlag(arg, kThrowOnFailureFlag, &GTEST_FLAG(throw_on_failure))
         ) {
       // Yes.  Shift the remainder of the argv list left by one.  Note
       // that argv has (*argc + 1) elements, the last one always being
@@ -3889,8 +4249,18 @@ void ParseGoogleTestFlagsOnlyImpl(int* argc, CharType** argv) {
       // We also need to decrement the iterator as we just removed
       // an element.
       i--;
+    } else if (arg_string == "--help" || arg_string == "-h" ||
+               arg_string == "-?" || arg_string == "/?") {
+      g_help_flag = true;
     }
   }
+
+  if (g_help_flag) {
+    // We print the help here instead of in RUN_ALL_TESTS(), as the
+    // latter may not be called at all if the user is using Google
+    // Test with another testing framework.
+    PrintColorEncoded(kColorEncodedHelpMessage);
+  }
 }
 
 // Parses the command line for Google Test flags, without initializing
@@ -3917,7 +4287,7 @@ void InitGoogleTestImpl(int* argc, CharType** argv) {
 
   internal::g_executable_path = internal::StreamableToString(argv[0]);
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
   g_argvs.clear();
   for (int i = 0; i != *argc; i++) {
     g_argvs.push_back(StreamableToString(argv[i]));
diff --git a/utils/unittest/googletest/include/gtest/gtest-death-test.h b/utils/unittest/googletest/include/gtest/gtest-death-test.h
index f0e109a3a3..dcb2b66e5c 100644
--- a/utils/unittest/googletest/include/gtest/gtest-death-test.h
+++ b/utils/unittest/googletest/include/gtest/gtest-death-test.h
@@ -49,7 +49,7 @@ namespace testing {
 // after forking.
 GTEST_DECLARE_string_(death_test_style);
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
 
 // The following macros are useful for writing death tests.
 
@@ -86,6 +86,57 @@ GTEST_DECLARE_string_(death_test_style);
 //
 //   ASSERT_EXIT(client.HangUpServer(), KilledBySIGHUP, "Hanging up!");
 //
+// On the regular expressions used in death tests:
+//
+//   On POSIX-compliant systems (*nix), we use the <regex.h> library,
+//   which uses the POSIX extended regex syntax.
+//
+//   On other platforms (e.g. Windows), we only support a simple regex
+//   syntax implemented as part of Google Test.  This limited
+//   implementation should be enough most of the time when writing
+//   death tests; though it lacks many features you can find in PCRE
+//   or POSIX extended regex syntax.  For example, we don't support
+//   union ("x|y"), grouping ("(xy)"), brackets ("[xy]"), and
+//   repetition count ("x{5,7}"), among others.
+//
+//   Below is the syntax that we do support.  We chose it to be a
+//   subset of both PCRE and POSIX extended regex, so it's easy to
+//   learn wherever you come from.  In the following: 'A' denotes a
+//   literal character, period (.), or a single \\ escape sequence;
+//   'x' and 'y' denote regular expressions; 'm' and 'n' are for
+//   natural numbers.
+//
+//     c     matches any literal character c
+//     \\d   matches any decimal digit
+//     \\D   matches any character that's not a decimal digit
+//     \\f   matches \f
+//     \\n   matches \n
+//     \\r   matches \r
+//     \\s   matches any ASCII whitespace, including \n
+//     \\S   matches any character that's not a whitespace
+//     \\t   matches \t
+//     \\v   matches \v
+//     \\w   matches any letter, _, or decimal digit
+//     \\W   matches any character that \\w doesn't match
+//     \\c   matches any literal character c, which must be a punctuation
+//     .     matches any single character except \n
+//     A?    matches 0 or 1 occurrences of A
+//     A*    matches 0 or many occurrences of A
+//     A+    matches 1 or many occurrences of A
+//     ^     matches the beginning of a string (not that of each line)
+//     $     matches the end of a string (not that of each line)
+//     xy    matches x followed by y
+//
+//   If you accidentally use PCRE or POSIX extended regex features
+//   not implemented by us, you will get a run-time failure.  In that
+//   case, please try to rewrite your regular expression within the
+//   above syntax.
+//
+//   This implementation is *not* meant to be as highly tuned or robust
+//   as a compiled regex library, but should perform well enough for a
+//   death test, which already incurs significant overhead by launching
+//   a child process.
+//
 // Known caveats:
 //
 //   A "threadsafe" style death test obtains the path to the test
@@ -133,6 +184,7 @@ class ExitedWithCode {
   const int exit_code_;
 };
 
+#if !GTEST_OS_WINDOWS
 // Tests that an exit code describes an exit due to termination by a
 // given signal.
 class KilledBySignal {
@@ -142,6 +194,7 @@ class KilledBySignal {
  private:
   const int signum_;
 };
+#endif  // !GTEST_OS_WINDOWS
 
 // EXPECT_DEBUG_DEATH asserts that the given statements die in debug mode.
 // The death testing framework causes this to have interesting semantics,
diff --git a/utils/unittest/googletest/include/gtest/gtest-message.h b/utils/unittest/googletest/include/gtest/gtest-message.h
index 7effd08647..99ae4546a2 100644
--- a/utils/unittest/googletest/include/gtest/gtest-message.h
+++ b/utils/unittest/googletest/include/gtest/gtest-message.h
@@ -102,7 +102,7 @@ class Message {
   }
 
   ~Message() { delete ss_; }
-#ifdef GTEST_OS_SYMBIAN
+#if GTEST_OS_SYMBIAN
   // Streams a value (either a pointer or not) to this object.
   template <typename T>
   inline Message& operator <<(const T& value) {
@@ -187,7 +187,7 @@ class Message {
   }
 
  private:
-#ifdef GTEST_OS_SYMBIAN
+#if GTEST_OS_SYMBIAN
   // These are needed as the Nokia Symbian Compiler cannot decide between
   // const T& and const T* in a function template. The Nokia compiler _can_
   // decide between class template specializations for T and T*, so a
diff --git a/utils/unittest/googletest/include/gtest/gtest-param-test.h b/utils/unittest/googletest/include/gtest/gtest-param-test.h
index 0cf05dc7ed..c9d4f2455a 100644
--- a/utils/unittest/googletest/include/gtest/gtest-param-test.h
+++ b/utils/unittest/googletest/include/gtest/gtest-param-test.h
@@ -151,7 +151,7 @@ INSTANTIATE_TEST_CASE_P(AnotherInstantiationName, FooTest, ValuesIn(pets));
 
 #include <gtest/internal/gtest-port.h>
 
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
 
 #include <gtest/internal/gtest-internal.h>
 #include <gtest/internal/gtest-param-util.h>
@@ -1190,7 +1190,7 @@ inline internal::ParamGenerator<bool> Bool() {
   return Values(false, true);
 }
 
-#ifdef GTEST_HAS_COMBINE
+#if GTEST_HAS_COMBINE
 // Combine() allows the user to combine two or more sequences to produce
 // values of a Cartesian product of those sequences' elements.
 //
diff --git a/utils/unittest/googletest/include/gtest/gtest-typed-test.h b/utils/unittest/googletest/include/gtest/gtest-typed-test.h
index dec42cf470..519edfe920 100644
--- a/utils/unittest/googletest/include/gtest/gtest-typed-test.h
+++ b/utils/unittest/googletest/include/gtest/gtest-typed-test.h
@@ -151,7 +151,7 @@ INSTANTIATE_TYPED_TEST_CASE_P(My, FooTest, MyTypes);
 
 // Implements typed tests.
 
-#ifdef GTEST_HAS_TYPED_TEST
+#if GTEST_HAS_TYPED_TEST
 
 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
 //
@@ -186,7 +186,7 @@ INSTANTIATE_TYPED_TEST_CASE_P(My, FooTest, MyTypes);
 
 // Implements type-parameterized tests.
 
-#ifdef GTEST_HAS_TYPED_TEST_P
+#if GTEST_HAS_TYPED_TEST_P
 
 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
 //
diff --git a/utils/unittest/googletest/include/gtest/gtest.h b/utils/unittest/googletest/include/gtest/gtest.h
index ebd3123b04..9b72b63692 100644
--- a/utils/unittest/googletest/include/gtest/gtest.h
+++ b/utils/unittest/googletest/include/gtest/gtest.h
@@ -93,17 +93,59 @@
 
 namespace testing {
 
-// The upper limit for valid stack trace depths.
-const int kMaxStackTraceDepth = 100;
+// Declares the flags.
 
-// This flag specifies the maximum number of stack frames to be
-// printed in a failure message.
-GTEST_DECLARE_int32_(stack_trace_depth);
+// This flag temporary enables the disabled tests.
+GTEST_DECLARE_bool_(also_run_disabled_tests);
+
+// This flag brings the debugger on an assertion failure.
+GTEST_DECLARE_bool_(break_on_failure);
+
+// This flag controls whether Google Test catches all test-thrown exceptions
+// and logs them as failures.
+GTEST_DECLARE_bool_(catch_exceptions);
+
+// This flag enables using colors in terminal output. Available values are
+// "yes" to enable colors, "no" (disable colors), or "auto" (the default)
+// to let Google Test decide.
+GTEST_DECLARE_string_(color);
+
+// This flag sets up the filter to select by name using a glob pattern
+// the tests to run. If the filter is not given all tests are executed.
+GTEST_DECLARE_string_(filter);
+
+// This flag causes the Google Test to list tests. None of the tests listed
+// are actually run if the flag is provided.
+GTEST_DECLARE_bool_(list_tests);
+
+// This flag controls whether Google Test emits a detailed XML report to a file
+// in addition to its normal textual output.
+GTEST_DECLARE_string_(output);
+
+// This flags control whether Google Test prints the elapsed time for each
+// test.
+GTEST_DECLARE_bool_(print_time);
+
+// This flag sets how many times the tests are repeated. The default value
+// is 1. If the value is -1 the tests are repeating forever.
+GTEST_DECLARE_int32_(repeat);
 
 // This flag controls whether Google Test includes Google Test internal
 // stack frames in failure stack traces.
 GTEST_DECLARE_bool_(show_internal_stack_frames);
 
+// This flag specifies the maximum number of stack frames to be
+// printed in a failure message.
+GTEST_DECLARE_int32_(stack_trace_depth);
+
+// When this flag is specified, a failed assertion will throw an
+// exception if exceptions are enabled, or exit the program with a
+// non-zero code otherwise.
+GTEST_DECLARE_bool_(throw_on_failure);
+
+// The upper limit for valid stack trace depths.
+const int kMaxStackTraceDepth = 100;
+
 namespace internal {
 
 class GTestFlagSaver;
@@ -353,7 +395,7 @@ class TestInfo {
   // Returns the result of the test.
   const internal::TestResult* result() const;
  private:
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
   friend class internal::DefaultDeathTestFactory;
 #endif  // GTEST_HAS_DEATH_TEST
   friend class internal::TestInfoImpl;
@@ -484,7 +526,7 @@ class UnitTest {
   // or NULL if no test is running.
   const TestInfo* current_test_info() const;
 
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
   // Returns the ParameterizedTestCaseRegistry object used to keep track of
   // value-parameterized tests and instantiate and register them.
   internal::ParameterizedTestCaseRegistry& parameterized_test_registry();
@@ -614,10 +656,20 @@ AssertionResult CmpHelperEQ(const char* expected_expression,
                             const char* actual_expression,
                             const T1& expected,
                             const T2& actual) {
+#ifdef _MSC_VER
+#pragma warning(push)          // Saves the current warning state.
+#pragma warning(disable:4389)  // Temporarily disables warning on
+                               // signed/unsigned mismatch.
+#endif
+
   if (expected == actual) {
     return AssertionSuccess();
   }
 
+#ifdef _MSC_VER
+#pragma warning(pop)          // Restores the warning state.
+#endif
+
   return EqFailure(expected_expression,
                    actual_expression,
                    FormatForComparisonFailureMessage(expected, actual),
@@ -688,7 +740,7 @@ class EqHelper<true> {
   template <typename T1, typename T2>
   static AssertionResult Compare(const char* expected_expression,
                                  const char* actual_expression,
-                                 const T1& expected,
+                                 const T1& /* expected */,
                                  T2* actual) {
     // We already know that 'expected' is a null pointer.
     return CmpHelperEQ(expected_expression, actual_expression,
@@ -893,7 +945,7 @@ class AssertHelper {
 
 }  // namespace internal
 
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
 // The abstract base class that all value-parameterized tests inherit from.
 //
 // This class adds support for accessing the test parameter value via
@@ -1187,7 +1239,7 @@ AssertionResult DoubleLE(const char* expr1, const char* expr2,
                          double val1, double val2);
 
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 
 // Macros that test for HRESULT failure and success, these are only useful
 // on Windows, and rely on Windows SDK macros and APIs to compile.
@@ -1242,6 +1294,52 @@ AssertionResult DoubleLE(const char* expr1, const char* expr2,
   ::testing::internal::ScopedTrace GTEST_CONCAT_TOKEN_(gtest_trace_, __LINE__)(\
     __FILE__, __LINE__, ::testing::Message() << (message))
 
+namespace internal {
+
+// This template is declared, but intentionally undefined.
+template <typename T1, typename T2>
+struct StaticAssertTypeEqHelper;
+
+template <typename T>
+struct StaticAssertTypeEqHelper<T, T> {};
+
+}  // namespace internal
+
+// Compile-time assertion for type equality.
+// StaticAssertTypeEq<type1, type2>() compiles iff type1 and type2 are
+// the same type.  The value it returns is not interesting.
+//
+// Instead of making StaticAssertTypeEq a class template, we make it a
+// function template that invokes a helper class template.  This
+// prevents a user from misusing StaticAssertTypeEq<T1, T2> by
+// defining objects of that type.
+//
+// CAVEAT:
+//
+// When used inside a method of a class template,
+// StaticAssertTypeEq<T1, T2>() is effective ONLY IF the method is
+// instantiated.  For example, given:
+//
+//   template <typename T> class Foo {
+//    public:
+//     void Bar() { testing::StaticAssertTypeEq<int, T>(); }
+//   };
+//
+// the code:
+//
+//   void Test1() { Foo<bool> foo; }
+//
+// will NOT generate a compiler error, as Foo<bool>::Bar() is never
+// actually instantiated.  Instead, you need:
+//
+//   void Test2() { Foo<bool> foo; foo.Bar(); }
+//
+// to cause a compiler error.
+template <typename T1, typename T2>
+bool StaticAssertTypeEq() {
+  internal::StaticAssertTypeEqHelper<T1, T2>();
+  return true;
+}
 
 // Defines a test.
 //
@@ -1269,7 +1367,7 @@ AssertionResult DoubleLE(const char* expr1, const char* expr2,
 // value, as it always calls GetTypeId<>() from the Google Test
 // framework.
 #define TEST(test_case_name, test_name)\
-  GTEST_TEST_(test_case_name, test_name,\
+  GTEST_TEST_(test_case_name, test_name, \
               ::testing::Test, ::testing::internal::GetTestTypeId())
 
 
@@ -1300,7 +1398,7 @@ AssertionResult DoubleLE(const char* expr1, const char* expr2,
 //   }
 
 #define TEST_F(test_fixture, test_name)\
-  GTEST_TEST_(test_fixture, test_name, test_fixture,\
+  GTEST_TEST_(test_fixture, test_name, test_fixture, \
               ::testing::internal::GetTypeId<test_fixture>())
 
 // Use this macro in main() to run all tests.  It returns 0 if all
diff --git a/utils/unittest/googletest/include/gtest/internal/gtest-death-test-internal.h b/utils/unittest/googletest/include/gtest/internal/gtest-death-test-internal.h
index 0769fcaa0e..ff2e490efe 100644
--- a/utils/unittest/googletest/include/gtest/internal/gtest-death-test-internal.h
+++ b/utils/unittest/googletest/include/gtest/internal/gtest-death-test-internal.h
@@ -39,6 +39,10 @@
 
 #include <gtest/internal/gtest-internal.h>
 
+#if GTEST_HAS_DEATH_TEST && GTEST_OS_WINDOWS
+#include <io.h>
+#endif  // GTEST_HAS_DEATH_TEST && GTEST_OS_WINDOWS
+
 namespace testing {
 namespace internal {
 
@@ -46,9 +50,10 @@ GTEST_DECLARE_string_(internal_run_death_test);
 
 // Names of the flags (needed for parsing Google Test flags).
 const char kDeathTestStyleFlag[] = "death_test_style";
+const char kDeathTestUseFork[] = "death_test_use_fork";
 const char kInternalRunDeathTestFlag[] = "internal_run_death_test";
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
 
 // DeathTest is a class that hides much of the complexity of the
 // GTEST_DEATH_TEST_ macro.  It is abstract; its static Create method
@@ -120,7 +125,12 @@ class DeathTest {
   // the last death test.
   static const char* LastMessage();
 
+  static void set_last_death_test_message(const String& message);
+
  private:
+  // A string containing a description of the outcome of the last death test.
+  static String last_death_test_message_;
+
   GTEST_DISALLOW_COPY_AND_ASSIGN_(DeathTest);
 };
 
@@ -166,7 +176,7 @@ bool ExitedUnsuccessfully(int exit_status);
         case ::testing::internal::DeathTest::EXECUTE_TEST: { \
           ::testing::internal::DeathTest::ReturnSentinel \
               gtest_sentinel(gtest_dt); \
-          { statement; } \
+          GTEST_HIDE_UNREACHABLE_CODE_(statement); \
           gtest_dt->Abort(::testing::internal::DeathTest::TEST_DID_NOT_DIE); \
           break; \
         } \
@@ -178,14 +188,42 @@ bool ExitedUnsuccessfully(int exit_status);
 // The symbol "fail" here expands to something into which a message
 // can be streamed.
 
-// A struct representing the parsed contents of the
+// A class representing the parsed contents of the
 // --gtest_internal_run_death_test flag, as it existed when
 // RUN_ALL_TESTS was called.
-struct InternalRunDeathTestFlag {
-  String file;
-  int line;
-  int index;
-  int status_fd;
+class InternalRunDeathTestFlag {
+ public:
+  InternalRunDeathTestFlag(const String& file,
+                           int line,
+                           int index,
+                           int status_fd)
+      : file_(file), line_(line), index_(index), status_fd_(status_fd) {}
+
+  ~InternalRunDeathTestFlag() {
+    if (status_fd_ >= 0)
+// Suppress MSVC complaints about POSIX functions.
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4996)
+#endif  // _MSC_VER
+      close(status_fd_);
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif  // _MSC_VER
+  }
+
+  String file() const { return file_; }
+  int line() const { return line_; }
+  int index() const { return index_; }
+  int status_fd() const { return status_fd_; }
+
+ private:
+  String file_;
+  int line_;
+  int index_;
+  int status_fd_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(InternalRunDeathTestFlag);
 };
 
 // Returns a newly created InternalRunDeathTestFlag object with fields
diff --git a/utils/unittest/googletest/include/gtest/internal/gtest-filepath.h b/utils/unittest/googletest/include/gtest/internal/gtest-filepath.h
index 9a0682af8b..1b2f586937 100644
--- a/utils/unittest/googletest/include/gtest/internal/gtest-filepath.h
+++ b/utils/unittest/googletest/include/gtest/internal/gtest-filepath.h
@@ -34,7 +34,7 @@
 // This header file declares classes and functions used internally by
 // Google Test.  They are subject to change without notice.
 //
-// This file is #included in testing/base/internal/gtest-internal.h
+// This file is #included in <gtest/internal/gtest-internal.h>.
 // Do not include this header file separately!
 
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
@@ -93,6 +93,12 @@ class FilePath {
                                int number,
                                const char* extension);
 
+  // Given directory = "dir", relative_path = "test.xml",
+  // returns "dir/test.xml".
+  // On Windows, uses \ as the separator rather than /.
+  static FilePath ConcatPaths(const FilePath& directory,
+                              const FilePath& relative_path);
+
   // Returns a pathname for a file that does not currently exist. The pathname
   // will be directory/base_name.extension or
   // directory/base_name_<number>.extension if directory/base_name.extension
@@ -164,6 +170,9 @@ class FilePath {
   // root directory per disk drive.)
   bool IsRootDirectory() const;
 
+  // Returns true if pathname describes an absolute path.
+  bool IsAbsolutePath() const;
+
  private:
   // Replaces multiple consecutive separators with a single separator.
   // For example, "bar///foo" becomes "bar/foo". Does not eliminate other
diff --git a/utils/unittest/googletest/include/gtest/internal/gtest-internal-inl.h b/utils/unittest/googletest/include/gtest/internal/gtest-internal-inl.h
index b8f67c1865..d079a3e1f3 100644
--- a/utils/unittest/googletest/include/gtest/internal/gtest-internal-inl.h
+++ b/utils/unittest/googletest/include/gtest/internal/gtest-internal-inl.h
@@ -37,20 +37,24 @@
 #ifndef GTEST_SRC_GTEST_INTERNAL_INL_H_
 #define GTEST_SRC_GTEST_INTERNAL_INL_H_
 
-// GTEST_IMPLEMENTATION is defined iff the current translation unit is
-// part of Google Test's implementation.
-#ifndef GTEST_IMPLEMENTATION
+// GTEST_IMPLEMENTATION_ is defined to 1 iff the current translation unit is
+// part of Google Test's implementation; otherwise it's undefined.
+#if !GTEST_IMPLEMENTATION_
 // A user is trying to include this from his code - just say no.
 #error "gtest-internal-inl.h is part of Google Test's internal implementation."
 #error "It must not be included except by Google Test itself."
-#endif  // GTEST_IMPLEMENTATION
+#endif  // GTEST_IMPLEMENTATION_
 
+#include <errno.h>
 #include <stddef.h>
+#include <stdlib.h>   // For strtoll/_strtoul64.
+
+#include <string>
 
 #include <gtest/internal/gtest-port.h>
 
-#ifdef GTEST_OS_WINDOWS
-#include <windows.h>  // NOLINT
+#if GTEST_OS_WINDOWS
+#include <windows.h>  // For DWORD.
 #endif  // GTEST_OS_WINDOWS
 
 #include <gtest/gtest.h>
@@ -60,19 +64,10 @@ namespace testing {
 
 // Declares the flags.
 //
-// We don't want the users to modify these flags in the code, but want
-// Google Test's own unit tests to be able to access them.  Therefore we
-// declare them here as opposed to in gtest.h.
-GTEST_DECLARE_bool_(break_on_failure);
-GTEST_DECLARE_bool_(catch_exceptions);
-GTEST_DECLARE_string_(color);
-GTEST_DECLARE_string_(filter);
-GTEST_DECLARE_bool_(list_tests);
-GTEST_DECLARE_string_(output);
-GTEST_DECLARE_bool_(print_time);
-GTEST_DECLARE_int32_(repeat);
-GTEST_DECLARE_int32_(stack_trace_depth);
-GTEST_DECLARE_bool_(show_internal_stack_frames);
+// We don't want the users to modify this flag in the code, but want
+// Google Test's own unit tests to be able to access it. Therefore we
+// declare it here as opposed to in gtest.h.
+GTEST_DECLARE_bool_(death_test_use_fork);
 
 namespace internal {
 
@@ -81,6 +76,7 @@ namespace internal {
 extern const TypeId kTestTypeIdInGoogleTest;
 
 // Names of the flags (needed for parsing Google Test flags).
+const char kAlsoRunDisabledTestsFlag[] = "also_run_disabled_tests";
 const char kBreakOnFailureFlag[] = "break_on_failure";
 const char kCatchExceptionsFlag[] = "catch_exceptions";
 const char kColorFlag[] = "color";
@@ -89,6 +85,7 @@ const char kListTestsFlag[] = "list_tests";
 const char kOutputFlag[] = "output";
 const char kPrintTimeFlag[] = "print_time";
 const char kRepeatFlag[] = "repeat";
+const char kThrowOnFailureFlag[] = "throw_on_failure";
 
 // This class saves the values of all Google Test flags in its c'tor, and
 // restores them in its d'tor.
@@ -96,37 +93,45 @@ class GTestFlagSaver {
  public:
   // The c'tor.
   GTestFlagSaver() {
+    also_run_disabled_tests_ = GTEST_FLAG(also_run_disabled_tests);
     break_on_failure_ = GTEST_FLAG(break_on_failure);
     catch_exceptions_ = GTEST_FLAG(catch_exceptions);
     color_ = GTEST_FLAG(color);
     death_test_style_ = GTEST_FLAG(death_test_style);
+    death_test_use_fork_ = GTEST_FLAG(death_test_use_fork);
     filter_ = GTEST_FLAG(filter);
     internal_run_death_test_ = GTEST_FLAG(internal_run_death_test);
     list_tests_ = GTEST_FLAG(list_tests);
     output_ = GTEST_FLAG(output);
     print_time_ = GTEST_FLAG(print_time);
     repeat_ = GTEST_FLAG(repeat);
+    throw_on_failure_ = GTEST_FLAG(throw_on_failure);
   }
 
   // The d'tor is not virtual.  DO NOT INHERIT FROM THIS CLASS.
   ~GTestFlagSaver() {
+    GTEST_FLAG(also_run_disabled_tests) = also_run_disabled_tests_;
     GTEST_FLAG(break_on_failure) = break_on_failure_;
     GTEST_FLAG(catch_exceptions) = catch_exceptions_;
     GTEST_FLAG(color) = color_;
     GTEST_FLAG(death_test_style) = death_test_style_;
+    GTEST_FLAG(death_test_use_fork) = death_test_use_fork_;
     GTEST_FLAG(filter) = filter_;
     GTEST_FLAG(internal_run_death_test) = internal_run_death_test_;
     GTEST_FLAG(list_tests) = list_tests_;
     GTEST_FLAG(output) = output_;
     GTEST_FLAG(print_time) = print_time_;
     GTEST_FLAG(repeat) = repeat_;
+    GTEST_FLAG(throw_on_failure) = throw_on_failure_;
   }
  private:
   // Fields for saving the original values of flags.
+  bool also_run_disabled_tests_;
   bool break_on_failure_;
   bool catch_exceptions_;
   String color_;
   String death_test_style_;
+  bool death_test_use_fork_;
   String filter_;
   String internal_run_death_test_;
   bool list_tests_;
@@ -134,6 +139,7 @@ class GTestFlagSaver {
   bool print_time_;
   bool pretty_;
   internal::Int32 repeat_;
+  bool throw_on_failure_;
 } GTEST_ATTRIBUTE_UNUSED_;
 
 // Converts a Unicode code point to a narrow string in UTF-8 encoding.
@@ -164,6 +170,32 @@ String WideStringToUtf8(const wchar_t* str, int num_chars);
 // Returns the number of active threads, or 0 when there is an error.
 size_t GetThreadCount();
 
+// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
+// if the variable is present. If a file already exists at this location, this
+// function will write over it. If the variable is present, but the file cannot
+// be created, prints an error and exits.
+void WriteToShardStatusFileIfNeeded();
+
+// Checks whether sharding is enabled by examining the relevant
+// environment variable values. If the variables are present,
+// but inconsistent (e.g., shard_index >= total_shards), prints
+// an error and exits. If in_subprocess_for_death_test, sharding is
+// disabled because it must only be applied to the original test
+// process. Otherwise, we could filter out death tests we intended to execute.
+bool ShouldShard(const char* total_shards_str, const char* shard_index_str,
+                 bool in_subprocess_for_death_test);
+
+// Parses the environment variable var as an Int32. If it is unset,
+// returns default_val. If it is not an Int32, prints an error and
+// and aborts.
+Int32 Int32FromEnvOrDie(const char* env_var, Int32 default_val);
+
+// Given the total number of shards, the shard index, and the test id,
+// returns true iff the test should be run on this shard. The test id is
+// some arbitrary but unique non-negative integer assigned to each test
+// method. Assumes that 0 <= shard_index < total_shards.
+bool ShouldRunTestOnShard(int total_shards, int shard_index, int test_id);
+
 // List is a simple singly-linked list container.
 //
 // We cannot use std::list as Microsoft's implementation of STL has
@@ -790,9 +822,10 @@ class UnitTestOptions {
   // Returns the output format, or "" for normal printed output.
   static String GetOutputFormat();
 
-  // Returns the name of the requested output file, or the default if none
-  // was explicitly specified.
-  static String GetOutputFile();
+  // Returns the absolute path of the requested output file, or the
+  // default (test_detail.xml in the original working directory) if
+  // none was explicitly specified.
+  static String GetAbsolutePathToOutputFile();
 
   // Functions for processing the gtest_filter flag.
 
@@ -808,7 +841,7 @@ class UnitTestOptions {
   static bool FilterMatchesTest(const String &test_case_name,
                                 const String &test_name);
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
   // Function for supporting the gtest_catch_exception flag.
 
   // Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
@@ -891,6 +924,8 @@ class DefaultGlobalTestPartResultReporter
 
  private:
   UnitTestImpl* const unit_test_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultGlobalTestPartResultReporter);
 };
 
 // This is the default per thread test part result reporter used in
@@ -905,6 +940,8 @@ class DefaultPerThreadTestPartResultReporter
 
  private:
   UnitTestImpl* const unit_test_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultPerThreadTestPartResultReporter);
 };
 
 // The private implementation of the UnitTest class.  We don't protect
@@ -1066,7 +1103,7 @@ class UnitTestImpl {
                 tear_down_tc)->AddTestInfo(test_info);
   }
 
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
   // Returns ParameterizedTestCaseRegistry object used to keep track of
   // value-parameterized tests and instantiate and register them.
   internal::ParameterizedTestCaseRegistry& parameterized_test_registry() {
@@ -1108,11 +1145,18 @@ class UnitTestImpl {
     ad_hoc_test_result_.Clear();
   }
 
+  enum ReactionToSharding {
+    HONOR_SHARDING_PROTOCOL,
+    IGNORE_SHARDING_PROTOCOL
+  };
+
   // Matches the full name of each test against the user-specified
   // filter to decide whether the test should run, then records the
   // result in each TestCase and TestInfo object.
+  // If shard_tests == HONOR_SHARDING_PROTOCOL, further filters tests
+  // based on sharding variables in the environment.
   // Returns the number of tests that should run.
-  int FilterTests();
+  int FilterTests(ReactionToSharding shard_tests);
 
   // Lists all the tests by name.
   void ListAllTests();
@@ -1139,7 +1183,7 @@ class UnitTestImpl {
     return gtest_trace_stack_.pointer();
   }
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
   // Returns a pointer to the parsed --gtest_internal_run_death_test
   // flag, or NULL if that flag was not specified.
   // This information is useful only in a death test child process.
@@ -1188,7 +1232,7 @@ class UnitTestImpl {
 
   internal::List<TestCase*> test_cases_;  // The list of TestCases.
 
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
   // ParameterizedTestRegistry object used to register value-parameterized
   // tests.
   internal::ParameterizedTestCaseRegistry parameterized_test_registry_;
@@ -1237,7 +1281,7 @@ class UnitTestImpl {
   // How long the test took to run, in milliseconds.
   TimeInMillis elapsed_time_;
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_DEATH_TEST
   // The decomposed components of the gtest_internal_run_death_test flag,
   // parsed when RUN_ALL_TESTS is called.
   internal::scoped_ptr<InternalRunDeathTestFlag> internal_run_death_test_flag_;
@@ -1256,11 +1300,98 @@ inline UnitTestImpl* GetUnitTestImpl() {
   return UnitTest::GetInstance()->impl();
 }
 
+// Internal helper functions for implementing the simple regular
+// expression matcher.
+bool IsInSet(char ch, const char* str);
+bool IsDigit(char ch);
+bool IsPunct(char ch);
+bool IsRepeat(char ch);
+bool IsWhiteSpace(char ch);
+bool IsWordChar(char ch);
+bool IsValidEscape(char ch);
+bool AtomMatchesChar(bool escaped, char pattern, char ch);
+bool ValidateRegex(const char* regex);
+bool MatchRegexAtHead(const char* regex, const char* str);
+bool MatchRepetitionAndRegexAtHead(
+    bool escaped, char ch, char repeat, const char* regex, const char* str);
+bool MatchRegexAnywhere(const char* regex, const char* str);
+
 // Parses the command line for Google Test flags, without initializing
 // other parts of Google Test.
 void ParseGoogleTestFlagsOnly(int* argc, char** argv);
 void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv);
 
+#if GTEST_HAS_DEATH_TEST
+
+// Returns the message describing the last system error, regardless of the
+// platform.
+String GetLastSystemErrorMessage();
+
+#if GTEST_OS_WINDOWS
+// Provides leak-safe Windows kernel handle ownership.
+class AutoHandle {
+ public:
+  AutoHandle() : handle_(INVALID_HANDLE_VALUE) {}
+  explicit AutoHandle(HANDLE handle) : handle_(handle) {}
+
+  ~AutoHandle() { Reset(); }
+
+  HANDLE Get() const { return handle_; }
+  void Reset() { Reset(INVALID_HANDLE_VALUE); }
+  void Reset(HANDLE handle) {
+    if (handle != handle_) {
+      if (handle_ != INVALID_HANDLE_VALUE)
+        ::CloseHandle(handle_);
+      handle_ = handle;
+    }
+  }
+
+ private:
+  HANDLE handle_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(AutoHandle);
+};
+#endif  // GTEST_OS_WINDOWS
+
+// Attempts to parse a string into a positive integer pointed to by the
+// number parameter.  Returns true if that is possible.
+// GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we can use
+// it here.
+template <typename Integer>
+bool ParseNaturalNumber(const ::std::string& str, Integer* number) {
+  // Fail fast if the given string does not begin with a digit;
+  // this bypasses strtoXXX's "optional leading whitespace and plus
+  // or minus sign" semantics, which are undesirable here.
+  if (str.empty() || !isdigit(str[0])) {
+    return false;
+  }
+  errno = 0;
+
+  char* end;
+  // BiggestConvertible is the largest integer type that system-provided
+  // string-to-number conversion routines can return.
+#if GTEST_OS_WINDOWS
+  typedef unsigned __int64 BiggestConvertible;
+  const BiggestConvertible parsed = _strtoui64(str.c_str(), &end, 10);
+#else
+  typedef unsigned long long BiggestConvertible;  // NOLINT
+  const BiggestConvertible parsed = strtoull(str.c_str(), &end, 10);
+#endif  // GTEST_OS_WINDOWS
+  const bool parse_success = *end == '\0' && errno == 0;
+
+  // TODO(vladl@google.com): Convert this to compile time assertion when it is
+  // available.
+  GTEST_CHECK_(sizeof(Integer) <= sizeof(parsed));
+
+  const Integer result = static_cast<Integer>(parsed);
+  if (parse_success && static_cast<BiggestConvertible>(result) == parsed) {
+    *number = result;
+    return true;
+  }
+  return false;
+}
+#endif  // GTEST_HAS_DEATH_TEST
+
 }  // namespace internal
 }  // namespace testing
 
diff --git a/utils/unittest/googletest/include/gtest/internal/gtest-internal.h b/utils/unittest/googletest/include/gtest/internal/gtest-internal.h
index 242ffea12f..def4b5970a 100644
--- a/utils/unittest/googletest/include/gtest/internal/gtest-internal.h
+++ b/utils/unittest/googletest/include/gtest/internal/gtest-internal.h
@@ -39,7 +39,7 @@
 
 #include <gtest/internal/gtest-port.h>
 
-#ifdef GTEST_OS_LINUX
+#if GTEST_OS_LINUX
 #include <stdlib.h>
 #include <sys/types.h>
 #include <sys/wait.h>
@@ -566,7 +566,7 @@ class TestFactoryImpl : public TestFactoryBase {
   virtual Test* CreateTest() { return new TestClass; }
 };
 
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 
 // Predicate-formatters for implementing the HRESULT checking macros
 // {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}
@@ -620,7 +620,7 @@ TestInfo* MakeAndRegisterTestInfo(
     TearDownTestCaseFunc tear_down_tc,
     TestFactoryBase* factory);
 
-#if defined(GTEST_HAS_TYPED_TEST) || defined(GTEST_HAS_TYPED_TEST_P)
+#if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
 
 // State of the definition of a type-parameterized test case.
 class TypedTestCasePState {
@@ -636,6 +636,7 @@ class TypedTestCasePState {
       fprintf(stderr, "%s Test %s must be defined before "
               "REGISTER_TYPED_TEST_CASE_P(%s, ...).\n",
               FormatFileLocation(file, line).c_str(), test_name, case_name);
+      fflush(stderr);
       abort();
     }
     defined_test_names_.insert(test_name);
@@ -768,6 +769,9 @@ String GetCurrentOsStackTraceExceptTop(UnitTest* unit_test, int skip_count);
 // Returns the number of failed test parts in the given test result object.
 int GetFailedPartCount(const TestResult* result);
 
+// A helper for suppressing warnings on unreachable code in some macros.
+bool AlwaysTrue();
+
 }  // namespace internal
 }  // namespace testing
 
@@ -784,12 +788,18 @@ int GetFailedPartCount(const TestResult* result);
 #define GTEST_SUCCESS_(message) \
   GTEST_MESSAGE_(message, ::testing::TPRT_SUCCESS)
 
+// Suppresses MSVC warnings 4072 (unreachable code) for the code following
+// statement if it returns or throws (or doesn't return or throw in some
+// situations).
+#define GTEST_HIDE_UNREACHABLE_CODE_(statement) \
+  if (::testing::internal::AlwaysTrue()) { statement; }
+
 #define GTEST_TEST_THROW_(statement, expected_exception, fail) \
   GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
   if (const char* gtest_msg = "") { \
     bool gtest_caught_expected = false; \
     try { \
-      statement; \
+      GTEST_HIDE_UNREACHABLE_CODE_(statement); \
     } \
     catch (expected_exception const&) { \
       gtest_caught_expected = true; \
@@ -813,7 +823,7 @@ int GetFailedPartCount(const TestResult* result);
   GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
   if (const char* gtest_msg = "") { \
     try { \
-      statement; \
+      GTEST_HIDE_UNREACHABLE_CODE_(statement); \
     } \
     catch (...) { \
       gtest_msg = "Expected: " #statement " doesn't throw an exception.\n" \
@@ -829,7 +839,7 @@ int GetFailedPartCount(const TestResult* result);
   if (const char* gtest_msg = "") { \
     bool gtest_caught_any = false; \
     try { \
-      statement; \
+      GTEST_HIDE_UNREACHABLE_CODE_(statement); \
     } \
     catch (...) { \
       gtest_caught_any = true; \
@@ -855,7 +865,7 @@ int GetFailedPartCount(const TestResult* result);
   GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
   if (const char* gtest_msg = "") { \
     ::testing::internal::HasNewFatalFailureHelper gtest_fatal_failure_checker; \
-    { statement; } \
+    GTEST_HIDE_UNREACHABLE_CODE_(statement); \
     if (gtest_fatal_failure_checker.has_new_fatal_failure()) { \
       gtest_msg = "Expected: " #statement " doesn't generate new fatal " \
                   "failures in the current thread.\n" \
diff --git a/utils/unittest/googletest/include/gtest/internal/gtest-param-util-generated.h b/utils/unittest/googletest/include/gtest/internal/gtest-param-util-generated.h
index 17f3f7bf97..ad06e02477 100644
--- a/utils/unittest/googletest/include/gtest/internal/gtest-param-util-generated.h
+++ b/utils/unittest/googletest/include/gtest/internal/gtest-param-util-generated.h
@@ -46,7 +46,7 @@
 
 #include <gtest/internal/gtest-port.h>
 
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
 
 #include <gtest/internal/gtest-param-util.h>
 
@@ -2659,7 +2659,7 @@ class ValueArray50 {
   const T50 v50_;
 };
 
-#ifdef GTEST_HAS_COMBINE
+#if GTEST_HAS_COMBINE
 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
 //
 // Generates values from the Cartesian product of values produced
diff --git a/utils/unittest/googletest/include/gtest/internal/gtest-param-util.h b/utils/unittest/googletest/include/gtest/internal/gtest-param-util.h
index 3bb07ecfc0..5559ab4492 100644
--- a/utils/unittest/googletest/include/gtest/internal/gtest-param-util.h
+++ b/utils/unittest/googletest/include/gtest/internal/gtest-param-util.h
@@ -40,7 +40,7 @@
 
 #include <gtest/internal/gtest-port.h>
 
-#ifdef GTEST_HAS_PARAM_TEST
+#if GTEST_HAS_PARAM_TEST
 
 #if GTEST_HAS_RTTI
 #include <typeinfo>
diff --git a/utils/unittest/googletest/include/gtest/internal/gtest-port.h b/utils/unittest/googletest/include/gtest/internal/gtest-port.h
index 20a95c9b2e..d949ec1aa9 100644
--- a/utils/unittest/googletest/include/gtest/internal/gtest-port.h
+++ b/utils/unittest/googletest/include/gtest/internal/gtest-port.h
@@ -63,21 +63,15 @@
 
 // This header defines the following utilities:
 //
-// Macros indicating the name of the Google C++ Testing Framework project:
-//   GTEST_NAME              - a string literal of the project name.
-//   GTEST_FLAG_PREFIX       - a string literal of the prefix all Google
-//                             Test flag names share.
-//   GTEST_FLAG_PREFIX_UPPER - a string literal of the prefix all Google
-//                             Test flag names share, in upper case.
-//
-// Macros indicating the current platform:
-//   GTEST_OS_CYGWIN   - defined iff compiled on Cygwin.
-//   GTEST_OS_LINUX    - defined iff compiled on Linux.
-//   GTEST_OS_MAC      - defined iff compiled on Mac OS X.
-//   GTEST_OS_SOLARIS  - defined iff compiled on Sun Solaris.
-//   GTEST_OS_SYMBIAN  - defined iff compiled for Symbian.
-//   GTEST_OS_WINDOWS  - defined iff compiled on Windows.
-//   GTEST_OS_ZOS      - defined iff compiled on IBM z/OS.
+// Macros indicating the current platform (defined to 1 if compiled on
+// the given platform; otherwise undefined):
+//   GTEST_OS_CYGWIN   - Cygwin
+//   GTEST_OS_LINUX    - Linux
+//   GTEST_OS_MAC      - Mac OS X
+//   GTEST_OS_SOLARIS  - Sun Solaris
+//   GTEST_OS_SYMBIAN  - Symbian
+//   GTEST_OS_WINDOWS  - Windows
+//   GTEST_OS_ZOS      - z/OS
 //
 // Among the platforms, Cygwin, Linux, Max OS X, and Windows have the
 // most stable support.  Since core members of the Google Test project
@@ -86,17 +80,19 @@
 // googletestframework@googlegroups.com (patches for fixing them are
 // even more welcome!).
 //
-// Note that it is possible that none of the GTEST_OS_ macros are defined.
+// Note that it is possible that none of the GTEST_OS_* macros are defined.
 //
-// Macros indicating available Google Test features:
-//   GTEST_HAS_COMBINE      - defined iff Combine construct is supported
-//                            in value-parameterized tests.
-//   GTEST_HAS_DEATH_TEST   - defined iff death tests are supported.
-//   GTEST_HAS_PARAM_TEST   - defined iff value-parameterized tests are
-//                            supported.
-//   GTEST_HAS_TYPED_TEST   - defined iff typed tests are supported.
-//   GTEST_HAS_TYPED_TEST_P - defined iff type-parameterized tests are
-//                            supported.
+// Macros indicating available Google Test features (defined to 1 if
+// the corresponding feature is supported; otherwise undefined):
+//   GTEST_HAS_COMBINE      - the Combine() function (for value-parameterized
+//                            tests)
+//   GTEST_HAS_DEATH_TEST   - death tests
+//   GTEST_HAS_PARAM_TEST   - value-parameterized tests
+//   GTEST_HAS_TYPED_TEST   - typed tests
+//   GTEST_HAS_TYPED_TEST_P - type-parameterized tests
+//   GTEST_USES_POSIX_RE    - enhanced POSIX regex is used.
+//   GTEST_USES_SIMPLE_RE   - our own simple regex is used;
+//                            the above two are mutually exclusive.
 //
 // Macros for basic C++ coding:
 //   GTEST_AMBIGUOUS_ELSE_BLOCKER_ - for disabling a gcc warning.
@@ -155,9 +151,11 @@
 #include <stdio.h>
 #include <iostream>  // Used for GTEST_CHECK_
 
-#define GTEST_NAME "Google Test"
-#define GTEST_FLAG_PREFIX "gtest_"
-#define GTEST_FLAG_PREFIX_UPPER "GTEST_"
+#define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
+#define GTEST_FLAG_PREFIX_ "gtest_"
+#define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
+#define GTEST_NAME_ "Google Test"
+#define GTEST_PROJECT_URL_ "http://code.google.com/p/googletest/"
 
 // Determines the version of gcc that is used to compile this.
 #ifdef __GNUC__
@@ -168,49 +166,76 @@
 
 // Determines the platform on which Google Test is compiled.
 #ifdef __CYGWIN__
-#define GTEST_OS_CYGWIN
+#define GTEST_OS_CYGWIN 1
 #elif __SYMBIAN32__
-#define GTEST_OS_SYMBIAN
+#define GTEST_OS_SYMBIAN 1
 #elif defined _MSC_VER
 // TODO(kenton@google.com): GTEST_OS_WINDOWS is currently used to mean
 //   both "The OS is Windows" and "The compiler is MSVC".  These
 //   meanings really should be separated in order to better support
 //   Windows compilers other than MSVC.
-#define GTEST_OS_WINDOWS
+#define GTEST_OS_WINDOWS 1
 #elif defined __APPLE__
-#define GTEST_OS_MAC
+#define GTEST_OS_MAC 1
 #elif defined __linux__
-#define GTEST_OS_LINUX
+#define GTEST_OS_LINUX 1
 #elif defined __MVS__
-#define GTEST_OS_ZOS
+#define GTEST_OS_ZOS 1
 #elif defined(__sun) && defined(__SVR4)
-#define GTEST_OS_SOLARIS
+#define GTEST_OS_SOLARIS 1
 #elif defined(__HAIKU__)
 #define GTEST_OS_HAIKU
 #endif  // _MSC_VER
 
-// Determines whether ::std::string and ::string are available.
+#if GTEST_OS_CYGWIN || GTEST_OS_LINUX || GTEST_OS_MAC
 
-#ifndef GTEST_HAS_STD_STRING
-// The user didn't tell us whether ::std::string is available, so we
-// need to figure it out.
+// On some platforms, <regex.h> needs someone to define size_t, and
+// won't compile otherwise.  We can #include it here as we already
+// included <stdlib.h>, which is guaranteed to define size_t through
+// <stddef.h>.
+#include <regex.h>  // NOLINT
+#define GTEST_USES_POSIX_RE 1
 
-#ifdef GTEST_OS_WINDOWS
+#else
+
+// <regex.h> may not be available on this platform.  Use our own
+// simple regex implementation instead.
+#define GTEST_USES_SIMPLE_RE 1
+
+#endif  // GTEST_OS_CYGWIN || GTEST_OS_LINUX || GTEST_OS_MAC
+
+// Defines GTEST_HAS_EXCEPTIONS to 1 if exceptions are enabled, or 0
+// otherwise.
+
+#ifdef _MSC_VER  // Compiled by MSVC?
 // Assumes that exceptions are enabled by default.
-#ifndef _HAS_EXCEPTIONS
+#ifndef _HAS_EXCEPTIONS  // MSVC uses this macro to enable exceptions.
 #define _HAS_EXCEPTIONS 1
 #endif  // _HAS_EXCEPTIONS
-// GTEST_HAS_EXCEPTIONS is non-zero iff exceptions are enabled.  It is
-// always defined, while _HAS_EXCEPTIONS is defined only on Windows.
 #define GTEST_HAS_EXCEPTIONS _HAS_EXCEPTIONS
-// On Windows, we can use ::std::string if the compiler version is VS
-// 2005 or above, or if exceptions are enabled.
-#define GTEST_HAS_STD_STRING ((_MSC_VER >= 1400) || GTEST_HAS_EXCEPTIONS)
-#else  // We are on Linux or Mac OS.
+#else  // The compiler is not MSVC.
+// gcc defines __EXCEPTIONS to 1 iff exceptions are enabled.  For
+// other compilers, we assume exceptions are disabled to be
+// conservative.
+#if defined(__GNUC__) && __EXCEPTIONS
+#define GTEST_HAS_EXCEPTIONS 1
+#else
 #define GTEST_HAS_EXCEPTIONS 0
-#define GTEST_HAS_STD_STRING 1
-#endif  // GTEST_OS_WINDOWS
+#endif  // defined(__GNUC__) && __EXCEPTIONS
+#endif  // _MSC_VER
 
+// Determines whether ::std::string and ::string are available.
+
+#ifndef GTEST_HAS_STD_STRING
+// The user didn't tell us whether ::std::string is available, so we
+// need to figure it out.  The only environment that we know
+// ::std::string is not available is MSVC 7.1 or lower with exceptions
+// disabled.
+#if defined(_MSC_VER) && (_MSC_VER < 1400) && !GTEST_HAS_EXCEPTIONS
+#define GTEST_HAS_STD_STRING 0
+#else
+#define GTEST_HAS_STD_STRING 1
+#endif
 #endif  // GTEST_HAS_STD_STRING
 
 #ifndef GTEST_HAS_GLOBAL_STRING
@@ -227,21 +252,23 @@
 // TODO(wan@google.com): uses autoconf to detect whether ::std::wstring
 //   is available.
 
-#if defined(GTEST_OS_CYGWIN) || defined(GTEST_OS_SOLARIS) || defined(GTEST_OS_HAIKU) || defined(_MINIX)
-// At least some versions of cygwin don't support ::std::wstring.
+#if GTEST_OS_CYGWIN || GTEST_OS_SOLARIS || GTEST_OS_HAIKU || defined(_MINIX)
+// Cygwin 1.5 and below doesn't support ::std::wstring.
+// Cygwin 1.7 might add wstring support; this should be updated when clear.
 // Solaris' libc++ doesn't support it either.
 // Minix currently doesn't support it either.
 #define GTEST_HAS_STD_WSTRING 0
 #else
 #define GTEST_HAS_STD_WSTRING GTEST_HAS_STD_STRING
-#endif  // defined(GTEST_OS_CYGWIN) || defined(GTEST_OS_SOLARIS)
+#endif  // GTEST_OS_CYGWIN || GTEST_OS_SOLARIS
 
 #endif  // GTEST_HAS_STD_WSTRING
 
 #ifndef GTEST_HAS_GLOBAL_WSTRING
 // The user didn't tell us whether ::wstring is available, so we need
 // to figure it out.
-#define GTEST_HAS_GLOBAL_WSTRING GTEST_HAS_GLOBAL_STRING
+#define GTEST_HAS_GLOBAL_WSTRING \
+    (GTEST_HAS_STD_WSTRING && GTEST_HAS_GLOBAL_STRING)
 #endif  // GTEST_HAS_GLOBAL_WSTRING
 
 #if GTEST_HAS_STD_STRING || GTEST_HAS_GLOBAL_STRING || \
@@ -295,13 +322,7 @@
 // Determines whether <pthread.h> is available.
 #ifndef GTEST_HAS_PTHREAD
 // The user didn't tell us, so we need to figure it out.
-
-#if defined(GTEST_OS_LINUX) || defined(GTEST_OS_MAC)
-#define GTEST_HAS_PTHREAD 1
-#else
-#define GTEST_HAS_PTHREAD 0
-#endif  // GTEST_OS_LINUX || GTEST_OS_MAC
-
+#define GTEST_HAS_PTHREAD (GTEST_OS_LINUX || GTEST_OS_MAC)
 #endif  // GTEST_HAS_PTHREAD
 
 // Determines whether tr1/tuple is available.  If you have tr1/tuple
@@ -342,33 +363,36 @@
 #ifndef GTEST_HAS_CLONE
 // The user didn't tell us, so we need to figure it out.
 
-#if defined(GTEST_OS_LINUX) && !defined(__ia64__)
+#if GTEST_OS_LINUX && !defined(__ia64__)
 #define GTEST_HAS_CLONE 1
 #else
 #define GTEST_HAS_CLONE 0
-#endif  // defined(GTEST_OS_LINUX) && !defined(__ia64__)
+#endif  // GTEST_OS_LINUX && !defined(__ia64__)
 
 #endif  // GTEST_HAS_CLONE
 
 // Determines whether to support death tests.
-#if GTEST_HAS_STD_STRING && GTEST_HAS_CLONE
-#define GTEST_HAS_DEATH_TEST
-// On some platforms, <regex.h> needs someone to define size_t, and
-// won't compile otherwise.  We can #include it here as we already
-// included <stdlib.h>, which is guaranteed to define size_t through
-// <stddef.h>.
-#include <regex.h>
+// Google Test does not support death tests for VC 7.1 and earlier for
+// these reasons:
+//   1. std::vector does not build in VC 7.1 when exceptions are disabled.
+//   2. std::string does not build in VC 7.1 when exceptions are disabled
+//      (this is covered by GTEST_HAS_STD_STRING guard).
+//   3. abort() in a VC 7.1 application compiled as GUI in debug config
+//      pops up a dialog window that cannot be suppressed programmatically.
+#if GTEST_HAS_STD_STRING && (GTEST_OS_LINUX || \
+                             GTEST_OS_MAC || \
+                             GTEST_OS_CYGWIN || \
+                             (GTEST_OS_WINDOWS && _MSC_VER >= 1400))
+#define GTEST_HAS_DEATH_TEST 1
 #include <vector>
-#include <fcntl.h>
-#include <sys/mman.h>
-#endif  // GTEST_HAS_STD_STRING && GTEST_HAS_CLONE
+#endif
 
 // Determines whether to support value-parameterized tests.
 
 #if defined(__GNUC__) || (_MSC_VER >= 1400)
 // TODO(vladl@google.com): get the implementation rid of vector and list
 // to compile on MSVC 7.1.
-#define GTEST_HAS_PARAM_TEST
+#define GTEST_HAS_PARAM_TEST 1
 #endif  // defined(__GNUC__) || (_MSC_VER >= 1400)
 
 // Determines whether to support type-driven tests.
@@ -376,21 +400,19 @@
 // Typed tests need <typeinfo> and variadic macros, which gcc and VC
 // 8.0+ support.
 #if defined(__GNUC__) || (_MSC_VER >= 1400)
-#define GTEST_HAS_TYPED_TEST
-#define GTEST_HAS_TYPED_TEST_P
+#define GTEST_HAS_TYPED_TEST 1
+#define GTEST_HAS_TYPED_TEST_P 1
 #endif  // defined(__GNUC__) || (_MSC_VER >= 1400)
 
 // Determines whether to support Combine(). This only makes sense when
 // value-parameterized tests are enabled.
-#if defined(GTEST_HAS_PARAM_TEST) && GTEST_HAS_TR1_TUPLE
-#define GTEST_HAS_COMBINE
-#endif  // defined(GTEST_HAS_PARAM_TEST) && GTEST_HAS_TR1_TUPLE
+#if GTEST_HAS_PARAM_TEST && GTEST_HAS_TR1_TUPLE
+#define GTEST_HAS_COMBINE 1
+#endif  // GTEST_HAS_PARAM_TEST && GTEST_HAS_TR1_TUPLE
 
 // Determines whether the system compiler uses UTF-16 for encoding wide strings.
-#if defined(GTEST_OS_WINDOWS) || defined(GTEST_OS_CYGWIN) || \
-        defined(GTEST_OS_SYMBIAN)
-#define GTEST_WIDE_STRING_USES_UTF16_ 1
-#endif
+#define GTEST_WIDE_STRING_USES_UTF16_ \
+    (GTEST_OS_WINDOWS || GTEST_OS_CYGWIN || GTEST_OS_SYMBIAN)
 
 // Defines some utility macros.
 
@@ -491,8 +513,6 @@ class scoped_ptr {
   GTEST_DISALLOW_COPY_AND_ASSIGN_(scoped_ptr);
 };
 
-#ifdef GTEST_HAS_DEATH_TEST
-
 // Defines RE.
 
 // A simple C++ wrapper for <regex.h>.  It uses the POSIX Enxtended
@@ -550,12 +570,16 @@ class RE {
   // String type here, in order to simplify dependencies between the
   // files.
   const char* pattern_;
+  bool is_valid_;
+#if GTEST_USES_POSIX_RE
   regex_t full_regex_;     // For FullMatch().
   regex_t partial_regex_;  // For PartialMatch().
-  bool is_valid_;
-};
+#else  // GTEST_USES_SIMPLE_RE
+  const char* full_pattern_;  // For FullMatch();
+#endif
 
-#endif  // GTEST_HAS_DEATH_TEST
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(RE);
+};
 
 // Defines logging utilities:
 //   GTEST_LOG_()   - logs messages at the specified severity level.
@@ -584,14 +608,17 @@ inline void FlushInfoLog() { fflush(NULL); }
 //   CaptureStderr     - starts capturing stderr.
 //   GetCapturedStderr - stops capturing stderr and returns the captured string.
 
-#ifdef GTEST_HAS_DEATH_TEST
+#if GTEST_HAS_STD_STRING
+void CaptureStderr();
+::std::string GetCapturedStderr();
+#endif  // GTEST_HAS_STD_STRING
+
+#if GTEST_HAS_DEATH_TEST
 
 // A copy of all command line arguments.  Set by InitGoogleTest().
 extern ::std::vector<String> g_argvs;
 
-void CaptureStderr();
 // GTEST_HAS_DEATH_TEST implies we have ::std::string.
-::std::string GetCapturedStderr();
 const ::std::vector<String>& GetArgvs();
 
 #endif  // GTEST_HAS_DEATH_TEST
@@ -675,10 +702,15 @@ struct is_pointer : public false_type {};
 template <typename T>
 struct is_pointer<T*> : public true_type {};
 
+#if GTEST_OS_WINDOWS
+#define GTEST_PATH_SEP_ "\\"
+#else
+#define GTEST_PATH_SEP_ "/"
+#endif  // GTEST_OS_WINDOWS
+
 // Defines BiggestInt as the biggest signed integer type the compiler
 // supports.
-
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
 typedef __int64 BiggestInt;
 #else
 typedef long long BiggestInt;  // NOLINT
@@ -736,7 +768,7 @@ class TypeWithSize<4> {
 template <>
 class TypeWithSize<8> {
  public:
-#ifdef GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
   typedef __int64 Int;
   typedef unsigned __int64 UInt;
 #else
@@ -759,7 +791,7 @@ inline const char* GetEnv(const char* name) {
 #ifdef _WIN32_WCE  // We are on Windows CE.
   // CE has no environment variables.
   return NULL;
-#elif defined(GTEST_OS_WINDOWS)  // We are on Windows proper.
+#elif GTEST_OS_WINDOWS  // We are on Windows proper.
   // MSVC 8 deprecates getenv(), so we want to suppress warning 4996
   // (deprecated function) there.
 #pragma warning(push)          // Saves the current warning state.
diff --git a/utils/unittest/googletest/include/gtest/internal/gtest-string.h b/utils/unittest/googletest/include/gtest/internal/gtest-string.h
index 178f14e126..566a6b57e2 100644
--- a/utils/unittest/googletest/include/gtest/internal/gtest-string.h
+++ b/utils/unittest/googletest/include/gtest/internal/gtest-string.h
@@ -35,7 +35,7 @@
 // Google Test.  They are subject to change without notice. They should not used
 // by code external to Google Test.
 //
-// This header file is #included by testing/base/internal/gtest-internal.h.
+// This header file is #included by <gtest/internal/gtest-internal.h>.
 // It should not be #included by other files.
 
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
diff --git a/utils/unittest/googletest/include/gtest/internal/gtest-type-util.h b/utils/unittest/googletest/include/gtest/internal/gtest-type-util.h
index 815da4ba83..1ea7d18e3b 100644
--- a/utils/unittest/googletest/include/gtest/internal/gtest-type-util.h
+++ b/utils/unittest/googletest/include/gtest/internal/gtest-type-util.h
@@ -45,7 +45,7 @@
 #include <gtest/internal/gtest-port.h>
 #include <gtest/internal/gtest-string.h>
 
-#if defined(GTEST_HAS_TYPED_TEST) || defined(GTEST_HAS_TYPED_TEST_P)
+#if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
 
 #ifdef __GNUC__
 #include <cxxabi.h>