gtest: Update to 1.8.0.

Acked-by: Kenneth Graunke <kenneth@whitecape.org>

26 files changed, 2975 insertions, 972 deletions

diff --git a/src/gtest/include/gtest/gtest-param-test.h b/src/gtest/include/gtest/gtest-param-test.h
index d6702c8f162..038f9ba79eb 100644
--- a/src/gtest/include/gtest/gtest-param-test.h
+++ b/src/gtest/include/gtest/gtest-param-test.h
@@ -1387,14 +1387,17 @@ internal::CartesianProductHolder10<Generator1, Generator2, Generator3,
     static int AddToRegistry() { \
       ::testing::UnitTest::GetInstance()->parameterized_test_registry(). \
           GetTestCasePatternHolder<test_case_name>(\
-              #test_case_name, __FILE__, __LINE__)->AddTestPattern(\
-                  #test_case_name, \
-                  #test_name, \
-                  new ::testing::internal::TestMetaFactory< \
-                      GTEST_TEST_CLASS_NAME_(test_case_name, test_name)>()); \
+              #test_case_name, \
+              ::testing::internal::CodeLocation(\
+                  __FILE__, __LINE__))->AddTestPattern(\
+                      #test_case_name, \
+                      #test_name, \
+                      new ::testing::internal::TestMetaFactory< \
+                          GTEST_TEST_CLASS_NAME_(\
+                              test_case_name, test_name)>()); \
       return 0; \
     } \
-    static int gtest_registering_dummy_; \
+    static int gtest_registering_dummy_ GTEST_ATTRIBUTE_UNUSED_; \
     GTEST_DISALLOW_COPY_AND_ASSIGN_(\
         GTEST_TEST_CLASS_NAME_(test_case_name, test_name)); \
   }; \
@@ -1403,16 +1406,36 @@ internal::CartesianProductHolder10<Generator1, Generator2, Generator3,
       GTEST_TEST_CLASS_NAME_(test_case_name, test_name)::AddToRegistry(); \
   void GTEST_TEST_CLASS_NAME_(test_case_name, test_name)::TestBody()
 
-# define INSTANTIATE_TEST_CASE_P(prefix, test_case_name, generator) \
+// The optional last argument to INSTANTIATE_TEST_CASE_P allows the user
+// to specify a function or functor that generates custom test name suffixes
+// based on the test parameters. The function should accept one argument of
+// type testing::TestParamInfo<class ParamType>, and return std::string.
+//
+// testing::PrintToStringParamName is a builtin test suffix generator that
+// returns the value of testing::PrintToString(GetParam()). It does not work
+// for std::string or C strings.
+//
+// Note: test names must be non-empty, unique, and may only contain ASCII
+// alphanumeric characters or underscore.
+
+# define INSTANTIATE_TEST_CASE_P(prefix, test_case_name, generator, ...) \
   ::testing::internal::ParamGenerator<test_case_name::ParamType> \
       gtest_##prefix##test_case_name##_EvalGenerator_() { return generator; } \
-  int gtest_##prefix##test_case_name##_dummy_ = \
+  ::std::string gtest_##prefix##test_case_name##_EvalGenerateName_( \
+      const ::testing::TestParamInfo<test_case_name::ParamType>& info) { \
+    return ::testing::internal::GetParamNameGen<test_case_name::ParamType> \
+        (__VA_ARGS__)(info); \
+  } \
+  int gtest_##prefix##test_case_name##_dummy_ GTEST_ATTRIBUTE_UNUSED_ = \
       ::testing::UnitTest::GetInstance()->parameterized_test_registry(). \
           GetTestCasePatternHolder<test_case_name>(\
-              #test_case_name, __FILE__, __LINE__)->AddTestCaseInstantiation(\
-                  #prefix, \
-                  &gtest_##prefix##test_case_name##_EvalGenerator_, \
-                  __FILE__, __LINE__)
+              #test_case_name, \
+              ::testing::internal::CodeLocation(\
+                  __FILE__, __LINE__))->AddTestCaseInstantiation(\
+                      #prefix, \
+                      &gtest_##prefix##test_case_name##_EvalGenerator_, \
+                      &gtest_##prefix##test_case_name##_EvalGenerateName_, \
+                      __FILE__, __LINE__)
 
 }  // namespace testing
 
diff --git a/src/gtest/include/gtest/gtest-param-test.h.pump b/src/gtest/include/gtest/gtest-param-test.h.pump
index 2dc9303b5e3..3078d6d2a19 100644
--- a/src/gtest/include/gtest/gtest-param-test.h.pump
+++ b/src/gtest/include/gtest/gtest-param-test.h.pump
@@ -453,14 +453,17 @@ internal::CartesianProductHolder$i<$for j, [[Generator$j]]> Combine(
     static int AddToRegistry() { \
       ::testing::UnitTest::GetInstance()->parameterized_test_registry(). \
           GetTestCasePatternHolder<test_case_name>(\
-              #test_case_name, __FILE__, __LINE__)->AddTestPattern(\
-                  #test_case_name, \
-                  #test_name, \
-                  new ::testing::internal::TestMetaFactory< \
-                      GTEST_TEST_CLASS_NAME_(test_case_name, test_name)>()); \
+              #test_case_name, \
+              ::testing::internal::CodeLocation(\
+                  __FILE__, __LINE__))->AddTestPattern(\
+                      #test_case_name, \
+                      #test_name, \
+                      new ::testing::internal::TestMetaFactory< \
+                          GTEST_TEST_CLASS_NAME_(\
+                              test_case_name, test_name)>()); \
       return 0; \
     } \
-    static int gtest_registering_dummy_; \
+    static int gtest_registering_dummy_ GTEST_ATTRIBUTE_UNUSED_; \
     GTEST_DISALLOW_COPY_AND_ASSIGN_(\
         GTEST_TEST_CLASS_NAME_(test_case_name, test_name)); \
   }; \
@@ -469,16 +472,36 @@ internal::CartesianProductHolder$i<$for j, [[Generator$j]]> Combine(
       GTEST_TEST_CLASS_NAME_(test_case_name, test_name)::AddToRegistry(); \
   void GTEST_TEST_CLASS_NAME_(test_case_name, test_name)::TestBody()
 
-# define INSTANTIATE_TEST_CASE_P(prefix, test_case_name, generator) \
+// The optional last argument to INSTANTIATE_TEST_CASE_P allows the user
+// to specify a function or functor that generates custom test name suffixes
+// based on the test parameters. The function should accept one argument of
+// type testing::TestParamInfo<class ParamType>, and return std::string.
+//
+// testing::PrintToStringParamName is a builtin test suffix generator that
+// returns the value of testing::PrintToString(GetParam()).
+//
+// Note: test names must be non-empty, unique, and may only contain ASCII
+// alphanumeric characters or underscore. Because PrintToString adds quotes
+// to std::string and C strings, it won't work for these types.
+
+# define INSTANTIATE_TEST_CASE_P(prefix, test_case_name, generator, ...) \
   ::testing::internal::ParamGenerator<test_case_name::ParamType> \
       gtest_##prefix##test_case_name##_EvalGenerator_() { return generator; } \
-  int gtest_##prefix##test_case_name##_dummy_ = \
+  ::std::string gtest_##prefix##test_case_name##_EvalGenerateName_( \
+      const ::testing::TestParamInfo<test_case_name::ParamType>& info) { \
+    return ::testing::internal::GetParamNameGen<test_case_name::ParamType> \
+        (__VA_ARGS__)(info); \
+  } \
+  int gtest_##prefix##test_case_name##_dummy_ GTEST_ATTRIBUTE_UNUSED_ = \
       ::testing::UnitTest::GetInstance()->parameterized_test_registry(). \
           GetTestCasePatternHolder<test_case_name>(\
-              #test_case_name, __FILE__, __LINE__)->AddTestCaseInstantiation(\
-                  #prefix, \
-                  &gtest_##prefix##test_case_name##_EvalGenerator_, \
-                  __FILE__, __LINE__)
+              #test_case_name, \
+              ::testing::internal::CodeLocation(\
+                  __FILE__, __LINE__))->AddTestCaseInstantiation(\
+                      #prefix, \
+                      &gtest_##prefix##test_case_name##_EvalGenerator_, \
+                      &gtest_##prefix##test_case_name##_EvalGenerateName_, \
+                      __FILE__, __LINE__)
 
 }  // namespace testing
 
diff --git a/src/gtest/include/gtest/gtest-printers.h b/src/gtest/include/gtest/gtest-printers.h
index 0639d9f5869..8a33164cb38 100644
--- a/src/gtest/include/gtest/gtest-printers.h
+++ b/src/gtest/include/gtest/gtest-printers.h
@@ -103,6 +103,10 @@
 #include "gtest/internal/gtest-port.h"
 #include "gtest/internal/gtest-internal.h"
 
+#if GTEST_HAS_STD_TUPLE_
+# include <tuple>
+#endif
+
 namespace testing {
 
 // Definitions in the 'internal' and 'internal2' name spaces are
@@ -250,6 +254,103 @@ void DefaultPrintNonContainerTo(const T& value, ::std::ostream* os) {
 namespace testing {
 namespace internal {
 
+// FormatForComparison<ToPrint, OtherOperand>::Format(value) formats a
+// value of type ToPrint that is an operand of a comparison assertion
+// (e.g. ASSERT_EQ).  OtherOperand is the type of the other operand in
+// the comparison, and is used to help determine the best way to
+// format the value.  In particular, when the value is a C string
+// (char pointer) and the other operand is an STL string object, we
+// want to format the C string as a string, since we know it is
+// compared by value with the string object.  If the value is a char
+// pointer but the other operand is not an STL string object, we don't
+// know whether the pointer is supposed to point to a NUL-terminated
+// string, and thus want to print it as a pointer to be safe.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+
+// The default case.
+template <typename ToPrint, typename OtherOperand>
+class FormatForComparison {
+ public:
+  static ::std::string Format(const ToPrint& value) {
+    return ::testing::PrintToString(value);
+  }
+};
+
+// Array.
+template <typename ToPrint, size_t N, typename OtherOperand>
+class FormatForComparison<ToPrint[N], OtherOperand> {
+ public:
+  static ::std::string Format(const ToPrint* value) {
+    return FormatForComparison<const ToPrint*, OtherOperand>::Format(value);
+  }
+};
+
+// By default, print C string as pointers to be safe, as we don't know
+// whether they actually point to a NUL-terminated string.
+
+#define GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(CharType)                \
+  template <typename OtherOperand>                                      \
+  class FormatForComparison<CharType*, OtherOperand> {                  \
+   public:                                                              \
+    static ::std::string Format(CharType* value) {                      \
+      return ::testing::PrintToString(static_cast<const void*>(value)); \
+    }                                                                   \
+  }
+
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char);
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char);
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(wchar_t);
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const wchar_t);
+
+#undef GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_
+
+// If a C string is compared with an STL string object, we know it's meant
+// to point to a NUL-terminated string, and thus can print it as a string.
+
+#define GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(CharType, OtherStringType) \
+  template <>                                                           \
+  class FormatForComparison<CharType*, OtherStringType> {               \
+   public:                                                              \
+    static ::std::string Format(CharType* value) {                      \
+      return ::testing::PrintToString(value);                           \
+    }                                                                   \
+  }
+
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char, ::std::string);
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char, ::std::string);
+
+#if GTEST_HAS_GLOBAL_STRING
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char, ::string);
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char, ::string);
+#endif
+
+#if GTEST_HAS_GLOBAL_WSTRING
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(wchar_t, ::wstring);
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const wchar_t, ::wstring);
+#endif
+
+#if GTEST_HAS_STD_WSTRING
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(wchar_t, ::std::wstring);
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const wchar_t, ::std::wstring);
+#endif
+
+#undef GTEST_IMPL_FORMAT_C_STRING_AS_STRING_
+
+// Formats a comparison assertion (e.g. ASSERT_EQ, EXPECT_LT, and etc)
+// operand to be used in a failure message.  The type (but not value)
+// of the other operand may affect the format.  This allows us to
+// print a char* as a raw pointer when it is compared against another
+// char* or void*, and print it as a C string when it is compared
+// against an std::string object, for example.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+template <typename T1, typename T2>
+std::string FormatForComparisonFailureMessage(
+    const T1& value, const T2& /* other_operand */) {
+  return FormatForComparison<T1, T2>::Format(value);
+}
+
 // UniversalPrinter<T>::Print(value, ostream_ptr) prints the given
 // value to the given ostream.  The caller must ensure that
 // 'ostream_ptr' is not NULL, or the behavior is undefined.
@@ -480,14 +581,16 @@ inline void PrintTo(const ::std::wstring& s, ::std::ostream* os) {
 }
 #endif  // GTEST_HAS_STD_WSTRING
 
-#if GTEST_HAS_TR1_TUPLE
-// Overload for ::std::tr1::tuple.  Needed for printing function arguments,
-// which are packed as tuples.
-
+#if GTEST_HAS_TR1_TUPLE || GTEST_HAS_STD_TUPLE_
 // Helper function for printing a tuple.  T must be instantiated with
 // a tuple type.
 template <typename T>
 void PrintTupleTo(const T& t, ::std::ostream* os);
+#endif  // GTEST_HAS_TR1_TUPLE || GTEST_HAS_STD_TUPLE_
+
+#if GTEST_HAS_TR1_TUPLE
+// Overload for ::std::tr1::tuple.  Needed for printing function arguments,
+// which are packed as tuples.
 
 // Overloaded PrintTo() for tuples of various arities.  We support
 // tuples of up-to 10 fields.  The following implementation works
@@ -561,6 +664,13 @@ void PrintTo(
 }
 #endif  // GTEST_HAS_TR1_TUPLE
 
+#if GTEST_HAS_STD_TUPLE_
+template <typename... Types>
+void PrintTo(const ::std::tuple<Types...>& t, ::std::ostream* os) {
+  PrintTupleTo(t, os);
+}
+#endif  // GTEST_HAS_STD_TUPLE_
+
 // Overload for std::pair.
 template <typename T1, typename T2>
 void PrintTo(const ::std::pair<T1, T2>& value, ::std::ostream* os) {
@@ -580,10 +690,7 @@ class UniversalPrinter {
  public:
   // MSVC warns about adding const to a function type, so we want to
   // disable the warning.
-#ifdef _MSC_VER
-# pragma warning(push)          // Saves the current warning state.
-# pragma warning(disable:4180)  // Temporarily disables warning 4180.
-#endif  // _MSC_VER
+  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
 
   // Note: we deliberately don't call this PrintTo(), as that name
   // conflicts with ::testing::internal::PrintTo in the body of the
@@ -600,9 +707,7 @@ class UniversalPrinter {
     PrintTo(value, os);
   }
 
-#ifdef _MSC_VER
-# pragma warning(pop)           // Restores the warning state.
-#endif  // _MSC_VER
+  GTEST_DISABLE_MSC_WARNINGS_POP_()
 };
 
 // UniversalPrintArray(begin, len, os) prints an array of 'len'
@@ -654,10 +759,7 @@ class UniversalPrinter<T&> {
  public:
   // MSVC warns about adding const to a function type, so we want to
   // disable the warning.
-#ifdef _MSC_VER
-# pragma warning(push)          // Saves the current warning state.
-# pragma warning(disable:4180)  // Temporarily disables warning 4180.
-#endif  // _MSC_VER
+  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
 
   static void Print(const T& value, ::std::ostream* os) {
     // Prints the address of the value.  We use reinterpret_cast here
@@ -668,9 +770,7 @@ class UniversalPrinter<T&> {
     UniversalPrint(value, os);
   }
 
-#ifdef _MSC_VER
-# pragma warning(pop)           // Restores the warning state.
-#endif  // _MSC_VER
+  GTEST_DISABLE_MSC_WARNINGS_POP_()
 };
 
 // Prints a value tersely: for a reference type, the referenced value
@@ -756,16 +856,65 @@ void UniversalPrint(const T& value, ::std::ostream* os) {
   UniversalPrinter<T1>::Print(value, os);
 }
 
-#if GTEST_HAS_TR1_TUPLE
 typedef ::std::vector<string> Strings;
 
+// TuplePolicy<TupleT> must provide:
+// - tuple_size
+//     size of tuple TupleT.
+// - get<size_t I>(const TupleT& t)
+//     static function extracting element I of tuple TupleT.
+// - tuple_element<size_t I>::type
+//     type of element I of tuple TupleT.
+template <typename TupleT>
+struct TuplePolicy;
+
+#if GTEST_HAS_TR1_TUPLE
+template <typename TupleT>
+struct TuplePolicy {
+  typedef TupleT Tuple;
+  static const size_t tuple_size = ::std::tr1::tuple_size<Tuple>::value;
+
+  template <size_t I>
+  struct tuple_element : ::std::tr1::tuple_element<I, Tuple> {};
+
+  template <size_t I>
+  static typename AddReference<
+      const typename ::std::tr1::tuple_element<I, Tuple>::type>::type get(
+      const Tuple& tuple) {
+    return ::std::tr1::get<I>(tuple);
+  }
+};
+template <typename TupleT>
+const size_t TuplePolicy<TupleT>::tuple_size;
+#endif  // GTEST_HAS_TR1_TUPLE
+
+#if GTEST_HAS_STD_TUPLE_
+template <typename... Types>
+struct TuplePolicy< ::std::tuple<Types...> > {
+  typedef ::std::tuple<Types...> Tuple;
+  static const size_t tuple_size = ::std::tuple_size<Tuple>::value;
+
+  template <size_t I>
+  struct tuple_element : ::std::tuple_element<I, Tuple> {};
+
+  template <size_t I>
+  static const typename ::std::tuple_element<I, Tuple>::type& get(
+      const Tuple& tuple) {
+    return ::std::get<I>(tuple);
+  }
+};
+template <typename... Types>
+const size_t TuplePolicy< ::std::tuple<Types...> >::tuple_size;
+#endif  // GTEST_HAS_STD_TUPLE_
+
+#if GTEST_HAS_TR1_TUPLE || GTEST_HAS_STD_TUPLE_
 // This helper template allows PrintTo() for tuples and
 // UniversalTersePrintTupleFieldsToStrings() to be defined by
 // induction on the number of tuple fields.  The idea is that
 // TuplePrefixPrinter<N>::PrintPrefixTo(t, os) prints the first N
 // fields in tuple t, and can be defined in terms of
 // TuplePrefixPrinter<N - 1>.
-
+//
 // The inductive case.
 template <size_t N>
 struct TuplePrefixPrinter {
@@ -773,9 +922,14 @@ struct TuplePrefixPrinter {
   template <typename Tuple>
   static void PrintPrefixTo(const Tuple& t, ::std::ostream* os) {
     TuplePrefixPrinter<N - 1>::PrintPrefixTo(t, os);
-    *os << ", ";
-    UniversalPrinter<typename ::std::tr1::tuple_element<N - 1, Tuple>::type>
-        ::Print(::std::tr1::get<N - 1>(t), os);
+    GTEST_INTENTIONAL_CONST_COND_PUSH_()
+    if (N > 1) {
+    GTEST_INTENTIONAL_CONST_COND_POP_()
+      *os << ", ";
+    }
+    UniversalPrinter<
+        typename TuplePolicy<Tuple>::template tuple_element<N - 1>::type>
+        ::Print(TuplePolicy<Tuple>::template get<N - 1>(t), os);
   }
 
   // Tersely prints the first N fields of a tuple to a string vector,
@@ -784,12 +938,12 @@ struct TuplePrefixPrinter {
   static void TersePrintPrefixToStrings(const Tuple& t, Strings* strings) {
     TuplePrefixPrinter<N - 1>::TersePrintPrefixToStrings(t, strings);
     ::std::stringstream ss;
-    UniversalTersePrint(::std::tr1::get<N - 1>(t), &ss);
+    UniversalTersePrint(TuplePolicy<Tuple>::template get<N - 1>(t), &ss);
     strings->push_back(ss.str());
   }
 };
 
-// Base cases.
+// Base case.
 template <>
 struct TuplePrefixPrinter<0> {
   template <typename Tuple>
@@ -798,34 +952,13 @@ struct TuplePrefixPrinter<0> {
   template <typename Tuple>
   static void TersePrintPrefixToStrings(const Tuple&, Strings*) {}
 };
-// We have to specialize the entire TuplePrefixPrinter<> class
-// template here, even though the definition of
-// TersePrintPrefixToStrings() is the same as the generic version, as
-// Embarcadero (formerly CodeGear, formerly Borland) C++ doesn't
-// support specializing a method template of a class template.
-template <>
-struct TuplePrefixPrinter<1> {
-  template <typename Tuple>
-  static void PrintPrefixTo(const Tuple& t, ::std::ostream* os) {
-    UniversalPrinter<typename ::std::tr1::tuple_element<0, Tuple>::type>::
-        Print(::std::tr1::get<0>(t), os);
-  }
 
-  template <typename Tuple>
-  static void TersePrintPrefixToStrings(const Tuple& t, Strings* strings) {
-    ::std::stringstream ss;
-    UniversalTersePrint(::std::tr1::get<0>(t), &ss);
-    strings->push_back(ss.str());
-  }
-};
-
-// Helper function for printing a tuple.  T must be instantiated with
-// a tuple type.
-template <typename T>
-void PrintTupleTo(const T& t, ::std::ostream* os) {
+// Helper function for printing a tuple.
+// Tuple must be either std::tr1::tuple or std::tuple type.
+template <typename Tuple>
+void PrintTupleTo(const Tuple& t, ::std::ostream* os) {
   *os << "(";
-  TuplePrefixPrinter< ::std::tr1::tuple_size<T>::value>::
-      PrintPrefixTo(t, os);
+  TuplePrefixPrinter<TuplePolicy<Tuple>::tuple_size>::PrintPrefixTo(t, os);
   *os << ")";
 }
 
@@ -835,11 +968,11 @@ void PrintTupleTo(const T& t, ::std::ostream* os) {
 template <typename Tuple>
 Strings UniversalTersePrintTupleFieldsToStrings(const Tuple& value) {
   Strings result;
-  TuplePrefixPrinter< ::std::tr1::tuple_size<Tuple>::value>::
+  TuplePrefixPrinter<TuplePolicy<Tuple>::tuple_size>::
       TersePrintPrefixToStrings(value, &result);
   return result;
 }
-#endif  // GTEST_HAS_TR1_TUPLE
+#endif  // GTEST_HAS_TR1_TUPLE || GTEST_HAS_STD_TUPLE_
 
 }  // namespace internal
 
@@ -852,4 +985,9 @@ template <typename T>
 
 }  // namespace testing
 
+// Include any custom printer added by the local installation.
+// We must include this header at the end to make sure it can use the
+// declarations from this file.
+#include "gtest/internal/custom/gtest-printers.h"
+
 #endif  // GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
diff --git a/src/gtest/include/gtest/gtest-typed-test.h b/src/gtest/include/gtest/gtest-typed-test.h
index fe1e83b274b..5f69d5678ea 100644
--- a/src/gtest/include/gtest/gtest-typed-test.h
+++ b/src/gtest/include/gtest/gtest-typed-test.h
@@ -181,7 +181,8 @@ INSTANTIATE_TYPED_TEST_CASE_P(My, FooTest, MyTypes);
           ::testing::internal::TemplateSel< \
               GTEST_TEST_CLASS_NAME_(CaseName, TestName)>, \
           GTEST_TYPE_PARAMS_(CaseName)>::Register(\
-              "", #CaseName, #TestName, 0); \
+              "", ::testing::internal::CodeLocation(__FILE__, __LINE__), \
+              #CaseName, #TestName, 0); \
   template <typename gtest_TypeParam_> \
   void GTEST_TEST_CLASS_NAME_(CaseName, TestName)<gtest_TypeParam_>::TestBody()
 
@@ -252,7 +253,10 @@ INSTANTIATE_TYPED_TEST_CASE_P(My, FooTest, MyTypes);
       ::testing::internal::TypeParameterizedTestCase<CaseName, \
           GTEST_CASE_NAMESPACE_(CaseName)::gtest_AllTests_, \
           ::testing::internal::TypeList< Types >::type>::Register(\
-              #Prefix, #CaseName, GTEST_REGISTERED_TEST_NAMES_(CaseName))
+              #Prefix, \
+              ::testing::internal::CodeLocation(__FILE__, __LINE__), \
+              &GTEST_TYPED_TEST_CASE_P_STATE_(CaseName), \
+              #CaseName, GTEST_REGISTERED_TEST_NAMES_(CaseName))
 
 #endif  // GTEST_HAS_TYPED_TEST_P
 
diff --git a/src/gtest/include/gtest/gtest.h b/src/gtest/include/gtest/gtest.h
index 6fa0a3925e7..f846c5bd669 100644
--- a/src/gtest/include/gtest/gtest.h
+++ b/src/gtest/include/gtest/gtest.h
@@ -70,14 +70,14 @@
 // class ::string, which has the same interface as ::std::string, but
 // has a different implementation.
 //
-// The user can define GTEST_HAS_GLOBAL_STRING to 1 to indicate that
+// You can define GTEST_HAS_GLOBAL_STRING to 1 to indicate that
 // ::string is available AND is a distinct type to ::std::string, or
 // define it to 0 to indicate otherwise.
 //
-// If the user's ::std::string and ::string are the same class due to
-// aliasing, he should define GTEST_HAS_GLOBAL_STRING to 0.
+// If ::std::string and ::string are the same class on your platform
+// due to aliasing, you should define GTEST_HAS_GLOBAL_STRING to 0.
 //
-// If the user doesn't define GTEST_HAS_GLOBAL_STRING, it is defined
+// If you do not define GTEST_HAS_GLOBAL_STRING, it is defined
 // heuristically.
 
 namespace testing {
@@ -258,8 +258,31 @@ class GTEST_API_ AssertionResult {
   // Copy constructor.
   // Used in EXPECT_TRUE/FALSE(assertion_result).
   AssertionResult(const AssertionResult& other);
+
+  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 /* forcing value to bool */)
+
   // Used in the EXPECT_TRUE/FALSE(bool_expression).
-  explicit AssertionResult(bool success) : success_(success) {}
+  //
+  // T must be contextually convertible to bool.
+  //
+  // The second parameter prevents this overload from being considered if
+  // the argument is implicitly convertible to AssertionResult. In that case
+  // we want AssertionResult's copy constructor to be used.
+  template <typename T>
+  explicit AssertionResult(
+      const T& success,
+      typename internal::EnableIf<
+          !internal::ImplicitlyConvertible<T, AssertionResult>::value>::type*
+          /*enabler*/ = NULL)
+      : success_(success) {}
+
+  GTEST_DISABLE_MSC_WARNINGS_POP_()
+
+  // Assignment operator.
+  AssertionResult& operator=(AssertionResult other) {
+    swap(other);
+    return *this;
+  }
 
   // Returns true iff the assertion succeeded.
   operator bool() const { return success_; }  // NOLINT
@@ -300,6 +323,9 @@ class GTEST_API_ AssertionResult {
     message_->append(a_message.GetString().c_str());
   }
 
+  // Swap the contents of this AssertionResult with other.
+  void swap(AssertionResult& other);
+
   // Stores result of the assertion predicate.
   bool success_;
   // Stores the message describing the condition in case the expectation
@@ -307,8 +333,6 @@ class GTEST_API_ AssertionResult {
   // Referenced via a pointer to avoid taking too much stack frame space
   // with test assertions.
   internal::scoped_ptr< ::std::string> message_;
-
-  GTEST_DISALLOW_ASSIGN_(AssertionResult);
 };
 
 // Makes a successful assertion result.
@@ -335,8 +359,8 @@ GTEST_API_ AssertionResult AssertionFailure(const Message& msg);
 //
 //   class FooTest : public testing::Test {
 //    protected:
-//     virtual void SetUp() { ... }
-//     virtual void TearDown() { ... }
+//     void SetUp() override { ... }
+//     void TearDown() override { ... }
 //     ...
 //   };
 //
@@ -428,20 +452,19 @@ class GTEST_API_ Test {
   // internal method to avoid clashing with names used in user TESTs.
   void DeleteSelf_() { delete this; }
 
-  // Uses a GTestFlagSaver to save and restore all Google Test flags.
-  const internal::GTestFlagSaver* const gtest_flag_saver_;
+  const internal::scoped_ptr< GTEST_FLAG_SAVER_ > gtest_flag_saver_;
 
-  // Often a user mis-spells SetUp() as Setup() and spends a long time
+  // Often a user misspells SetUp() as Setup() and spends a long time
   // wondering why it is never called by Google Test.  The declaration of
   // the following method is solely for catching such an error at
   // compile time:
   //
   //   - The return type is deliberately chosen to be not void, so it
-  //   will be a conflict if a user declares void Setup() in his test
-  //   fixture.
+  //   will be a conflict if void Setup() is declared in the user's
+  //   test fixture.
   //
   //   - This method is private, so it will be another compiler error
-  //   if a user calls it from his test fixture.
+  //   if the method is called from the user's test fixture.
   //
   // DO NOT OVERRIDE THIS FUNCTION.
   //
@@ -646,6 +669,12 @@ class GTEST_API_ TestInfo {
     return NULL;
   }
 
+  // Returns the file name where this test is defined.
+  const char* file() const { return location_.file.c_str(); }
+
+  // Returns the line where this test is defined.
+  int line() const { return location_.line; }
+
   // Returns true if this test should run, that is if the test is not
   // disabled (or it is disabled but the also_run_disabled_tests flag has
   // been specified) and its full name matches the user-specified filter.
@@ -688,6 +717,7 @@ class GTEST_API_ TestInfo {
       const char* name,
       const char* type_param,
       const char* value_param,
+      internal::CodeLocation code_location,
       internal::TypeId fixture_class_id,
       Test::SetUpTestCaseFunc set_up_tc,
       Test::TearDownTestCaseFunc tear_down_tc,
@@ -699,6 +729,7 @@ class GTEST_API_ TestInfo {
            const std::string& name,
            const char* a_type_param,   // NULL if not a type-parameterized test
            const char* a_value_param,  // NULL if not a value-parameterized test
+           internal::CodeLocation a_code_location,
            internal::TypeId fixture_class_id,
            internal::TestFactoryBase* factory);
 
@@ -725,6 +756,7 @@ class GTEST_API_ TestInfo {
   // Text representation of the value parameter, or NULL if this is not a
   // value-parameterized test.
   const internal::scoped_ptr<const ::std::string> value_param_;
+  internal::CodeLocation location_;
   const internal::TypeId fixture_class_id_;   // ID of the test fixture class
   bool should_run_;                 // True iff this test should run
   bool is_disabled_;                // True iff this test is disabled
@@ -924,7 +956,7 @@ class GTEST_API_ TestCase {
 };
 
 // An Environment object is capable of setting up and tearing down an
-// environment.  The user should subclass this to define his own
+// environment.  You should subclass this to define your own
 // environment(s).
 //
 // An Environment object does the set-up and tear-down in virtual
@@ -1336,137 +1368,42 @@ GTEST_API_ void InitGoogleTest(int* argc, wchar_t** argv);
 
 namespace internal {
 
-// FormatForComparison<ToPrint, OtherOperand>::Format(value) formats a
-// value of type ToPrint that is an operand of a comparison assertion
-// (e.g. ASSERT_EQ).  OtherOperand is the type of the other operand in
-// the comparison, and is used to help determine the best way to
-// format the value.  In particular, when the value is a C string
-// (char pointer) and the other operand is an STL string object, we
-// want to format the C string as a string, since we know it is
-// compared by value with the string object.  If the value is a char
-// pointer but the other operand is not an STL string object, we don't
-// know whether the pointer is supposed to point to a NUL-terminated
-// string, and thus want to print it as a pointer to be safe.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-// The default case.
-template <typename ToPrint, typename OtherOperand>
-class FormatForComparison {
- public:
-  static ::std::string Format(const ToPrint& value) {
-    return ::testing::PrintToString(value);
-  }
-};
-
-// Array.
-template <typename ToPrint, size_t N, typename OtherOperand>
-class FormatForComparison<ToPrint[N], OtherOperand> {
- public:
-  static ::std::string Format(const ToPrint* value) {
-    return FormatForComparison<const ToPrint*, OtherOperand>::Format(value);
-  }
-};
-
-// By default, print C string as pointers to be safe, as we don't know
-// whether they actually point to a NUL-terminated string.
-
-#define GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(CharType)                \
-  template <typename OtherOperand>                                      \
-  class FormatForComparison<CharType*, OtherOperand> {                  \
-   public:                                                              \
-    static ::std::string Format(CharType* value) {                      \
-      return ::testing::PrintToString(static_cast<const void*>(value)); \
-    }                                                                   \
-  }
-
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(wchar_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const wchar_t);
-
-#undef GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_
-
-// If a C string is compared with an STL string object, we know it's meant
-// to point to a NUL-terminated string, and thus can print it as a string.
-
-#define GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(CharType, OtherStringType) \
-  template <>                                                           \
-  class FormatForComparison<CharType*, OtherStringType> {               \
-   public:                                                              \
-    static ::std::string Format(CharType* value) {                      \
-      return ::testing::PrintToString(value);                           \
-    }                                                                   \
-  }
-
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char, ::std::string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char, ::std::string);
-
-#if GTEST_HAS_GLOBAL_STRING
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char, ::string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char, ::string);
-#endif
-
-#if GTEST_HAS_GLOBAL_WSTRING
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(wchar_t, ::wstring);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const wchar_t, ::wstring);
-#endif
-
-#if GTEST_HAS_STD_WSTRING
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(wchar_t, ::std::wstring);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const wchar_t, ::std::wstring);
-#endif
-
-#undef GTEST_IMPL_FORMAT_C_STRING_AS_STRING_
-
-// Formats a comparison assertion (e.g. ASSERT_EQ, EXPECT_LT, and etc)
-// operand to be used in a failure message.  The type (but not value)
-// of the other operand may affect the format.  This allows us to
-// print a char* as a raw pointer when it is compared against another
-// char* or void*, and print it as a C string when it is compared
-// against an std::string object, for example.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+// Separate the error generating code from the code path to reduce the stack
+// frame size of CmpHelperEQ. This helps reduce the overhead of some sanitizers
+// when calling EXPECT_* in a tight loop.
 template <typename T1, typename T2>
-std::string FormatForComparisonFailureMessage(
-    const T1& value, const T2& /* other_operand */) {
-  return FormatForComparison<T1, T2>::Format(value);
+AssertionResult CmpHelperEQFailure(const char* lhs_expression,
+                                   const char* rhs_expression,
+                                   const T1& lhs, const T2& rhs) {
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   FormatForComparisonFailureMessage(lhs, rhs),
+                   FormatForComparisonFailureMessage(rhs, lhs),
+                   false);
 }
 
 // The helper function for {ASSERT|EXPECT}_EQ.
 template <typename T1, typename T2>
-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) {
+AssertionResult CmpHelperEQ(const char* lhs_expression,
+                            const char* rhs_expression,
+                            const T1& lhs,
+                            const T2& rhs) {
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4389 /* signed/unsigned mismatch */)
+  if (lhs == rhs) {
     return AssertionSuccess();
   }
+GTEST_DISABLE_MSC_WARNINGS_POP_()
 
-#ifdef _MSC_VER
-# pragma warning(pop)          // Restores the warning state.
-#endif
-
-  return EqFailure(expected_expression,
-                   actual_expression,
-                   FormatForComparisonFailureMessage(expected, actual),
-                   FormatForComparisonFailureMessage(actual, expected),
-                   false);
+  return CmpHelperEQFailure(lhs_expression, rhs_expression, lhs, rhs);
 }
 
 // With this overloaded version, we allow anonymous enums to be used
 // in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous enums
 // can be implicitly cast to BiggestInt.
-GTEST_API_ AssertionResult CmpHelperEQ(const char* expected_expression,
-                                       const char* actual_expression,
-                                       BiggestInt expected,
-                                       BiggestInt actual);
+GTEST_API_ AssertionResult CmpHelperEQ(const char* lhs_expression,
+                                       const char* rhs_expression,
+                                       BiggestInt lhs,
+                                       BiggestInt rhs);
 
 // The helper class for {ASSERT|EXPECT}_EQ.  The template argument
 // lhs_is_null_literal is true iff the first argument to ASSERT_EQ()
@@ -1477,12 +1414,11 @@ class EqHelper {
  public:
   // This templatized version is for the general case.
   template <typename T1, typename T2>
-  static AssertionResult Compare(const char* expected_expression,
-                                 const char* actual_expression,
-                                 const T1& expected,
-                                 const T2& actual) {
-    return CmpHelperEQ(expected_expression, actual_expression, expected,
-                       actual);
+  static AssertionResult Compare(const char* lhs_expression,
+                                 const char* rhs_expression,
+                                 const T1& lhs,
+                                 const T2& rhs) {
+    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
   }
 
   // With this overloaded version, we allow anonymous enums to be used
@@ -1491,12 +1427,11 @@ class EqHelper {
   //
   // Even though its body looks the same as the above version, we
   // cannot merge the two, as it will make anonymous enums unhappy.
-  static AssertionResult Compare(const char* expected_expression,
-                                 const char* actual_expression,
-                                 BiggestInt expected,
-                                 BiggestInt actual) {
-    return CmpHelperEQ(expected_expression, actual_expression, expected,
-                       actual);
+  static AssertionResult Compare(const char* lhs_expression,
+                                 const char* rhs_expression,
+                                 BiggestInt lhs,
+                                 BiggestInt rhs) {
+    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
   }
 };
 
@@ -1511,40 +1446,52 @@ class EqHelper<true> {
   // EXPECT_EQ(false, a_bool).
   template <typename T1, typename T2>
   static AssertionResult Compare(
-      const char* expected_expression,
-      const char* actual_expression,
-      const T1& expected,
-      const T2& actual,
+      const char* lhs_expression,
+      const char* rhs_expression,
+      const T1& lhs,
+      const T2& rhs,
       // The following line prevents this overload from being considered if T2
       // is not a pointer type.  We need this because ASSERT_EQ(NULL, my_ptr)
       // expands to Compare("", "", NULL, my_ptr), which requires a conversion
       // to match the Secret* in the other overload, which would otherwise make
       // this template match better.
       typename EnableIf<!is_pointer<T2>::value>::type* = 0) {
-    return CmpHelperEQ(expected_expression, actual_expression, expected,
-                       actual);
+    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
   }
 
   // This version will be picked when the second argument to ASSERT_EQ() is a
   // pointer, e.g. ASSERT_EQ(NULL, a_pointer).
   template <typename T>
   static AssertionResult Compare(
-      const char* expected_expression,
-      const char* actual_expression,
+      const char* lhs_expression,
+      const char* rhs_expression,
       // We used to have a second template parameter instead of Secret*.  That
       // template parameter would deduce to 'long', making this a better match
       // than the first overload even without the first overload's EnableIf.
       // Unfortunately, gcc with -Wconversion-null warns when "passing NULL to
       // non-pointer argument" (even a deduced integral argument), so the old
       // implementation caused warnings in user code.
-      Secret* /* expected (NULL) */,
-      T* actual) {
-    // We already know that 'expected' is a null pointer.
-    return CmpHelperEQ(expected_expression, actual_expression,
-                       static_cast<T*>(NULL), actual);
+      Secret* /* lhs (NULL) */,
+      T* rhs) {
+    // We already know that 'lhs' is a null pointer.
+    return CmpHelperEQ(lhs_expression, rhs_expression,
+                       static_cast<T*>(NULL), rhs);
   }
 };
 
+// Separate the error generating code from the code path to reduce the stack
+// frame size of CmpHelperOP. This helps reduce the overhead of some sanitizers
+// when calling EXPECT_OP in a tight loop.
+template <typename T1, typename T2>
+AssertionResult CmpHelperOpFailure(const char* expr1, const char* expr2,
+                                   const T1& val1, const T2& val2,
+                                   const char* op) {
+  return AssertionFailure()
+         << "Expected: (" << expr1 << ") " << op << " (" << expr2
+         << "), actual: " << FormatForComparisonFailureMessage(val1, val2)
+         << " vs " << FormatForComparisonFailureMessage(val2, val1);
+}
+
 // A macro for implementing the helper functions needed to implement
 // ASSERT_?? and EXPECT_??.  It is here just to avoid copy-and-paste
 // of similar code.
@@ -1555,6 +1502,7 @@ class EqHelper<true> {
 // with gcc 4.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+
 #define GTEST_IMPL_CMP_HELPER_(op_name, op)\
 template <typename T1, typename T2>\
 AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
@@ -1562,10 +1510,7 @@ AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
   if (val1 op val2) {\
     return AssertionSuccess();\
   } else {\
-    return AssertionFailure() \
-        << "Expected: (" << expr1 << ") " #op " (" << expr2\
-        << "), actual: " << FormatForComparisonFailureMessage(val1, val2)\
-        << " vs " << FormatForComparisonFailureMessage(val2, val1);\
+    return CmpHelperOpFailure(expr1, expr2, val1, val2, #op);\
   }\
 }\
 GTEST_API_ AssertionResult CmpHelper##op_name(\
@@ -1589,18 +1534,18 @@ GTEST_IMPL_CMP_HELPER_(GT, >);
 // The helper function for {ASSERT|EXPECT}_STREQ.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTREQ(const char* expected_expression,
-                                          const char* actual_expression,
-                                          const char* expected,
-                                          const char* actual);
+GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
+                                          const char* s2_expression,
+                                          const char* s1,
+                                          const char* s2);
 
 // The helper function for {ASSERT|EXPECT}_STRCASEEQ.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRCASEEQ(const char* expected_expression,
-                                              const char* actual_expression,
-                                              const char* expected,
-                                              const char* actual);
+GTEST_API_ AssertionResult CmpHelperSTRCASEEQ(const char* s1_expression,
+                                              const char* s2_expression,
+                                              const char* s1,
+                                              const char* s2);
 
 // The helper function for {ASSERT|EXPECT}_STRNE.
 //
@@ -1622,10 +1567,10 @@ GTEST_API_ AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
 // Helper function for *_STREQ on wide strings.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTREQ(const char* expected_expression,
-                                          const char* actual_expression,
-                                          const wchar_t* expected,
-                                          const wchar_t* actual);
+GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
+                                          const char* s2_expression,
+                                          const wchar_t* s1,
+                                          const wchar_t* s2);
 
 // Helper function for *_STRNE on wide strings.
 //
@@ -1683,28 +1628,28 @@ namespace internal {
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 template <typename RawType>
-AssertionResult CmpHelperFloatingPointEQ(const char* expected_expression,
-                                         const char* actual_expression,
-                                         RawType expected,
-                                         RawType actual) {
-  const FloatingPoint<RawType> lhs(expected), rhs(actual);
+AssertionResult CmpHelperFloatingPointEQ(const char* lhs_expression,
+                                         const char* rhs_expression,
+                                         RawType lhs_value,
+                                         RawType rhs_value) {
+  const FloatingPoint<RawType> lhs(lhs_value), rhs(rhs_value);
 
   if (lhs.AlmostEquals(rhs)) {
     return AssertionSuccess();
   }
 
-  ::std::stringstream expected_ss;
-  expected_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-              << expected;
+  ::std::stringstream lhs_ss;
+  lhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
+         << lhs_value;
 
-  ::std::stringstream actual_ss;
-  actual_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-            << actual;
+  ::std::stringstream rhs_ss;
+  rhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
+         << rhs_value;
 
-  return EqFailure(expected_expression,
-                   actual_expression,
-                   StringStreamToString(&expected_ss),
-                   StringStreamToString(&actual_ss),
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   StringStreamToString(&lhs_ss),
+                   StringStreamToString(&rhs_ss),
                    false);
 }
 
@@ -1912,13 +1857,13 @@ class TestWithParam : public Test, public WithParamInterface<T> {
 // AssertionResult. For more information on how to use AssertionResult with
 // these macros see comments on that class.
 #define EXPECT_TRUE(condition) \
-  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
+  GTEST_TEST_BOOLEAN_((condition), #condition, false, true, \
                       GTEST_NONFATAL_FAILURE_)
 #define EXPECT_FALSE(condition) \
   GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
                       GTEST_NONFATAL_FAILURE_)
 #define ASSERT_TRUE(condition) \
-  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
+  GTEST_TEST_BOOLEAN_((condition), #condition, false, true, \
                       GTEST_FATAL_FAILURE_)
 #define ASSERT_FALSE(condition) \
   GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
@@ -1930,12 +1875,12 @@ class TestWithParam : public Test, public WithParamInterface<T> {
 
 // Macros for testing equalities and inequalities.
 //
-//    * {ASSERT|EXPECT}_EQ(expected, actual): Tests that expected == actual
-//    * {ASSERT|EXPECT}_NE(v1, v2):           Tests that v1 != v2
-//    * {ASSERT|EXPECT}_LT(v1, v2):           Tests that v1 < v2
-//    * {ASSERT|EXPECT}_LE(v1, v2):           Tests that v1 <= v2
-//    * {ASSERT|EXPECT}_GT(v1, v2):           Tests that v1 > v2
-//    * {ASSERT|EXPECT}_GE(v1, v2):           Tests that v1 >= v2
+//    * {ASSERT|EXPECT}_EQ(v1, v2): Tests that v1 == v2
+//    * {ASSERT|EXPECT}_NE(v1, v2): Tests that v1 != v2
+//    * {ASSERT|EXPECT}_LT(v1, v2): Tests that v1 < v2
+//    * {ASSERT|EXPECT}_LE(v1, v2): Tests that v1 <= v2
+//    * {ASSERT|EXPECT}_GT(v1, v2): Tests that v1 > v2
+//    * {ASSERT|EXPECT}_GE(v1, v2): Tests that v1 >= v2
 //
 // When they are not, Google Test prints both the tested expressions and
 // their actual values.  The values must be compatible built-in types,
@@ -1957,8 +1902,8 @@ class TestWithParam : public Test, public WithParamInterface<T> {
 //   are related, not how their content is related.  To compare two C
 //   strings by content, use {ASSERT|EXPECT}_STR*().
 //
-//   3. {ASSERT|EXPECT}_EQ(expected, actual) is preferred to
-//   {ASSERT|EXPECT}_TRUE(expected == actual), as the former tells you
+//   3. {ASSERT|EXPECT}_EQ(v1, v2) is preferred to
+//   {ASSERT|EXPECT}_TRUE(v1 == v2), as the former tells you
 //   what the actual value is when it fails, and similarly for the
 //   other comparisons.
 //
@@ -1974,12 +1919,12 @@ class TestWithParam : public Test, public WithParamInterface<T> {
 //   ASSERT_LT(i, array_size);
 //   ASSERT_GT(records.size(), 0) << "There is no record left.";
 
-#define EXPECT_EQ(expected, actual) \
+#define EXPECT_EQ(val1, val2) \
   EXPECT_PRED_FORMAT2(::testing::internal:: \
-                      EqHelper<GTEST_IS_NULL_LITERAL_(expected)>::Compare, \
-                      expected, actual)
-#define EXPECT_NE(expected, actual) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNE, expected, actual)
+                      EqHelper<GTEST_IS_NULL_LITERAL_(val1)>::Compare, \
+                      val1, val2)
+#define EXPECT_NE(val1, val2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
 #define EXPECT_LE(val1, val2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
 #define EXPECT_LT(val1, val2) \
@@ -1989,10 +1934,10 @@ class TestWithParam : public Test, public WithParamInterface<T> {
 #define EXPECT_GT(val1, val2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
 
-#define GTEST_ASSERT_EQ(expected, actual) \
+#define GTEST_ASSERT_EQ(val1, val2) \
   ASSERT_PRED_FORMAT2(::testing::internal:: \
-                      EqHelper<GTEST_IS_NULL_LITERAL_(expected)>::Compare, \
-                      expected, actual)
+                      EqHelper<GTEST_IS_NULL_LITERAL_(val1)>::Compare, \
+                      val1, val2)
 #define GTEST_ASSERT_NE(val1, val2) \
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
 #define GTEST_ASSERT_LE(val1, val2) \
@@ -2047,29 +1992,29 @@ class TestWithParam : public Test, public WithParamInterface<T> {
 //
 // These macros evaluate their arguments exactly once.
 
-#define EXPECT_STREQ(expected, actual) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, expected, actual)
+#define EXPECT_STREQ(s1, s2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
 #define EXPECT_STRNE(s1, s2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
-#define EXPECT_STRCASEEQ(expected, actual) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, expected, actual)
+#define EXPECT_STRCASEEQ(s1, s2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
 #define EXPECT_STRCASENE(s1, s2)\
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
 
-#define ASSERT_STREQ(expected, actual) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, expected, actual)
+#define ASSERT_STREQ(s1, s2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
 #define ASSERT_STRNE(s1, s2) \
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
-#define ASSERT_STRCASEEQ(expected, actual) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, expected, actual)
+#define ASSERT_STRCASEEQ(s1, s2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
 #define ASSERT_STRCASENE(s1, s2)\
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
 
 // Macros for comparing floating-point numbers.
 //
-//    * {ASSERT|EXPECT}_FLOAT_EQ(expected, actual):
+//    * {ASSERT|EXPECT}_FLOAT_EQ(val1, val2):
 //         Tests that two float values are almost equal.
-//    * {ASSERT|EXPECT}_DOUBLE_EQ(expected, actual):
+//    * {ASSERT|EXPECT}_DOUBLE_EQ(val1, val2):
 //         Tests that two double values are almost equal.
 //    * {ASSERT|EXPECT}_NEAR(v1, v2, abs_error):
 //         Tests that v1 and v2 are within the given distance to each other.
@@ -2079,21 +2024,21 @@ class TestWithParam : public Test, public WithParamInterface<T> {
 // FloatingPoint template class in gtest-internal.h if you are
 // interested in the implementation details.
 
-#define EXPECT_FLOAT_EQ(expected, actual)\
+#define EXPECT_FLOAT_EQ(val1, val2)\
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
-                      expected, actual)
+                      val1, val2)
 
-#define EXPECT_DOUBLE_EQ(expected, actual)\
+#define EXPECT_DOUBLE_EQ(val1, val2)\
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
-                      expected, actual)
+                      val1, val2)
 
-#define ASSERT_FLOAT_EQ(expected, actual)\
+#define ASSERT_FLOAT_EQ(val1, val2)\
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
-                      expected, actual)
+                      val1, val2)
 
-#define ASSERT_DOUBLE_EQ(expected, actual)\
+#define ASSERT_DOUBLE_EQ(val1, val2)\
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
-                      expected, actual)
+                      val1, val2)
 
 #define EXPECT_NEAR(val1, val2, abs_error)\
   EXPECT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
@@ -2215,8 +2160,8 @@ bool StaticAssertTypeEq() {
 // The convention is to end the test case name with "Test".  For
 // example, a test case for the Foo class can be named FooTest.
 //
-// The user should put his test code between braces after using this
-// macro.  Example:
+// Test code should appear between braces after an invocation of
+// this macro.  Example:
 //
 //   TEST(FooTest, InitializesCorrectly) {
 //     Foo foo;
diff --git a/src/gtest/include/gtest/internal/custom/gtest-port.h b/src/gtest/include/gtest/internal/custom/gtest-port.h
new file mode 100644
index 00000000000..7e744bd3bb3
--- /dev/null
+++ b/src/gtest/include/gtest/internal/custom/gtest-port.h
@@ -0,0 +1,69 @@
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Injection point for custom user configurations.
+// The following macros can be defined:
+//
+//   Flag related macros:
+//     GTEST_FLAG(flag_name)
+//     GTEST_USE_OWN_FLAGFILE_FLAG_  - Define to 0 when the system provides its
+//                                     own flagfile flag parsing.
+//     GTEST_DECLARE_bool_(name)
+//     GTEST_DECLARE_int32_(name)
+//     GTEST_DECLARE_string_(name)
+//     GTEST_DEFINE_bool_(name, default_val, doc)
+//     GTEST_DEFINE_int32_(name, default_val, doc)
+//     GTEST_DEFINE_string_(name, default_val, doc)
+//
+//   Test filtering:
+//     GTEST_TEST_FILTER_ENV_VAR_ - The name of an environment variable that
+//                                  will be used if --GTEST_FLAG(test_filter)
+//                                  is not provided.
+//
+//   Logging:
+//     GTEST_LOG_(severity)
+//     GTEST_CHECK_(condition)
+//     Functions LogToStderr() and FlushInfoLog() have to be provided too.
+//
+//   Threading:
+//     GTEST_HAS_NOTIFICATION_ - Enabled if Notification is already provided.
+//     GTEST_HAS_MUTEX_AND_THREAD_LOCAL_ - Enabled if Mutex and ThreadLocal are
+//                                         already provided.
+//     Must also provide GTEST_DECLARE_STATIC_MUTEX_(mutex) and
+//     GTEST_DEFINE_STATIC_MUTEX_(mutex)
+//
+//     GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)
+//     GTEST_LOCK_EXCLUDED_(locks)
+//
+// ** Custom implementation starts here **
+
+#ifndef GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
+#define GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
+
+#endif  // GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
diff --git a/src/gtest/include/gtest/internal/custom/gtest-printers.h b/src/gtest/include/gtest/internal/custom/gtest-printers.h
new file mode 100644
index 00000000000..60c1ea050b6
--- /dev/null
+++ b/src/gtest/include/gtest/internal/custom/gtest-printers.h
@@ -0,0 +1,42 @@
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// This file provides an injection point for custom printers in a local
+// installation of gTest.
+// It will be included from gtest-printers.h and the overrides in this file
+// will be visible to everyone.
+// See documentation at gtest/gtest-printers.h for details on how to define a
+// custom printer.
+//
+// ** Custom implementation starts here **
+
+#ifndef GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
+#define GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
+
+#endif  // GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
diff --git a/src/gtest/include/gtest/internal/custom/gtest.h b/src/gtest/include/gtest/internal/custom/gtest.h
new file mode 100644
index 00000000000..c27412a8981
--- /dev/null
+++ b/src/gtest/include/gtest/internal/custom/gtest.h
@@ -0,0 +1,41 @@
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Injection point for custom user configurations.
+// The following macros can be defined:
+//
+// GTEST_OS_STACK_TRACE_GETTER_  - The name of an implementation of
+//                                 OsStackTraceGetterInterface.
+//
+// ** Custom implementation starts here **
+
+#ifndef GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
+#define GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
+
+#endif  // GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
diff --git a/src/gtest/include/gtest/internal/gtest-filepath.h b/src/gtest/include/gtest/internal/gtest-filepath.h
index 184450686c5..7a13b4b0de6 100644
--- a/src/gtest/include/gtest/internal/gtest-filepath.h
+++ b/src/gtest/include/gtest/internal/gtest-filepath.h
@@ -192,7 +192,7 @@ class GTEST_API_ FilePath {
 
   void Normalize();
 
-  // Returns a pointer to the last occurrence of a valid path separator in
+  // Returns a pointer to the last occurence of a valid path separator in
   // the FilePath. On Windows, for example, both '/' and '\' are valid path
   // separators. Returns NULL if no path separator was found.
   const char* FindLastPathSeparator() const;
diff --git a/src/gtest/include/gtest/internal/gtest-internal.h b/src/gtest/include/gtest/internal/gtest-internal.h
index 0dcc3a3194f..5afb7223ec4 100644
--- a/src/gtest/include/gtest/internal/gtest-internal.h
+++ b/src/gtest/include/gtest/internal/gtest-internal.h
@@ -55,7 +55,10 @@
 #include <string.h>
 #include <iomanip>
 #include <limits>
+#include <map>
 #include <set>
+#include <string>
+#include <vector>
 
 #include "gtest/gtest-message.h"
 #include "gtest/internal/gtest-string.h"
@@ -97,9 +100,6 @@ class ScopedTrace;                     // Implements scoped trace.
 class TestInfoImpl;                    // Opaque implementation of TestInfo
 class UnitTestImpl;                    // Opaque implementation of UnitTest
 
-// How many times InitGoogleTest() has been called.
-GTEST_API_ extern int g_init_gtest_count;
-
 // The text used in failure messages to indicate the start of the
 // stack trace.
 GTEST_API_ extern const char kStackTraceMarker[];
@@ -171,6 +171,36 @@ class GTEST_API_ ScopedTrace {
                             // c'tor and d'tor.  Therefore it doesn't
                             // need to be used otherwise.
 
+namespace edit_distance {
+// Returns the optimal edits to go from 'left' to 'right'.
+// All edits cost the same, with replace having lower priority than
+// add/remove.
+// Simple implementation of the Wagner–Fischer algorithm.
+// See http://en.wikipedia.org/wiki/Wagner-Fischer_algorithm
+enum EditType { kMatch, kAdd, kRemove, kReplace };
+GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
+    const std::vector<size_t>& left, const std::vector<size_t>& right);
+
+// Same as above, but the input is represented as strings.
+GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
+    const std::vector<std::string>& left,
+    const std::vector<std::string>& right);
+
+// Create a diff of the input strings in Unified diff format.
+GTEST_API_ std::string CreateUnifiedDiff(const std::vector<std::string>& left,
+                                         const std::vector<std::string>& right,
+                                         size_t context = 2);
+
+}  // namespace edit_distance
+
+// Calculate the diff between 'left' and 'right' and return it in unified diff
+// format.
+// If not null, stores in 'total_line_count' the total number of lines found
+// in left + right.
+GTEST_API_ std::string DiffStrings(const std::string& left,
+                                   const std::string& right,
+                                   size_t* total_line_count);
+
 // Constructs and returns the message for an equality assertion
 // (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
 //
@@ -471,6 +501,13 @@ GTEST_API_ AssertionResult IsHRESULTFailure(const char* expr,
 typedef void (*SetUpTestCaseFunc)();
 typedef void (*TearDownTestCaseFunc)();
 
+struct CodeLocation {
+  CodeLocation(const string& a_file, int a_line) : file(a_file), line(a_line) {}
+
+  string file;
+  int line;
+};
+
 // Creates a new TestInfo object and registers it with Google Test;
 // returns the created object.
 //
@@ -482,6 +519,7 @@ typedef void (*TearDownTestCaseFunc)();
 //                     this is not a typed or a type-parameterized test.
 //   value_param       text representation of the test's value parameter,
 //                     or NULL if this is not a type-parameterized test.
+//   code_location:    code location where the test is defined
 //   fixture_class_id: ID of the test fixture class
 //   set_up_tc:        pointer to the function that sets up the test case
 //   tear_down_tc:     pointer to the function that tears down the test case
@@ -493,6 +531,7 @@ GTEST_API_ TestInfo* MakeAndRegisterTestInfo(
     const char* name,
     const char* type_param,
     const char* value_param,
+    CodeLocation code_location,
     TypeId fixture_class_id,
     SetUpTestCaseFunc set_up_tc,
     TearDownTestCaseFunc tear_down_tc,
@@ -522,10 +561,21 @@ class GTEST_API_ TypedTestCasePState {
       fflush(stderr);
       posix::Abort();
     }
-    defined_test_names_.insert(test_name);
+    registered_tests_.insert(
+        ::std::make_pair(test_name, CodeLocation(file, line)));
     return true;
   }
 
+  bool TestExists(const std::string& test_name) const {
+    return registered_tests_.count(test_name) > 0;
+  }
+
+  const CodeLocation& GetCodeLocation(const std::string& test_name) const {
+    RegisteredTestsMap::const_iterator it = registered_tests_.find(test_name);
+    GTEST_CHECK_(it != registered_tests_.end());
+    return it->second;
+  }
+
   // Verifies that registered_tests match the test names in
   // defined_test_names_; returns registered_tests if successful, or
   // aborts the program otherwise.
@@ -533,8 +583,10 @@ class GTEST_API_ TypedTestCasePState {
       const char* file, int line, const char* registered_tests);
 
  private:
+  typedef ::std::map<std::string, CodeLocation> RegisteredTestsMap;
+
   bool registered_;
-  ::std::set<const char*> defined_test_names_;
+  RegisteredTestsMap registered_tests_;
 };
 
 // Skips to the first non-space char after the first comma in 'str';
@@ -555,6 +607,11 @@ inline std::string GetPrefixUntilComma(const char* str) {
   return comma == NULL ? str : std::string(str, comma);
 }
 
+// Splits a given string on a given delimiter, populating a given
+// vector with the fields.
+void SplitString(const ::std::string& str, char delimiter,
+                 ::std::vector< ::std::string>* dest);
+
 // TypeParameterizedTest<Fixture, TestSel, Types>::Register()
 // registers a list of type-parameterized tests with Google Test.  The
 // return value is insignificant - we just need to return something
@@ -569,8 +626,10 @@ class TypeParameterizedTest {
   // specified in INSTANTIATE_TYPED_TEST_CASE_P(Prefix, TestCase,
   // Types).  Valid values for 'index' are [0, N - 1] where N is the
   // length of Types.
-  static bool Register(const char* prefix, const char* case_name,
-                       const char* test_names, int index) {
+  static bool Register(const char* prefix,
+                       CodeLocation code_location,
+                       const char* case_name, const char* test_names,
+                       int index) {
     typedef typename Types::Head Type;
     typedef Fixture<Type> FixtureClass;
     typedef typename GTEST_BIND_(TestSel, Type) TestClass;
@@ -580,9 +639,10 @@ class TypeParameterizedTest {
     MakeAndRegisterTestInfo(
         (std::string(prefix) + (prefix[0] == '\0' ? "" : "/") + case_name + "/"
          + StreamableToString(index)).c_str(),
-        GetPrefixUntilComma(test_names).c_str(),
+        StripTrailingSpaces(GetPrefixUntilComma(test_names)).c_str(),
         GetTypeName<Type>().c_str(),
         NULL,  // No value parameter.
+        code_location,
         GetTypeId<FixtureClass>(),
         TestClass::SetUpTestCase,
         TestClass::TearDownTestCase,
@@ -590,7 +650,7 @@ class TypeParameterizedTest {
 
     // Next, recurses (at compile time) with the tail of the type list.
     return TypeParameterizedTest<Fixture, TestSel, typename Types::Tail>
-        ::Register(prefix, case_name, test_names, index + 1);
+        ::Register(prefix, code_location, case_name, test_names, index + 1);
   }
 };
 
@@ -598,8 +658,9 @@ class TypeParameterizedTest {
 template <GTEST_TEMPLATE_ Fixture, class TestSel>
 class TypeParameterizedTest<Fixture, TestSel, Types0> {
  public:
-  static bool Register(const char* /*prefix*/, const char* /*case_name*/,
-                       const char* /*test_names*/, int /*index*/) {
+  static bool Register(const char* /*prefix*/, CodeLocation,
+                       const char* /*case_name*/, const char* /*test_names*/,
+                       int /*index*/) {
     return true;
   }
 };
@@ -611,17 +672,31 @@ class TypeParameterizedTest<Fixture, TestSel, Types0> {
 template <GTEST_TEMPLATE_ Fixture, typename Tests, typename Types>
 class TypeParameterizedTestCase {
  public:
-  static bool Register(const char* prefix, const char* case_name,
-                       const char* test_names) {
+  static bool Register(const char* prefix, CodeLocation code_location,
+                       const TypedTestCasePState* state,
+                       const char* case_name, const char* test_names) {
+    std::string test_name = StripTrailingSpaces(
+        GetPrefixUntilComma(test_names));
+    if (!state->TestExists(test_name)) {
+      fprintf(stderr, "Failed to get code location for test %s.%s at %s.",
+              case_name, test_name.c_str(),
+              FormatFileLocation(code_location.file.c_str(),
+                                 code_location.line).c_str());
+      fflush(stderr);
+      posix::Abort();
+    }
+    const CodeLocation& test_location = state->GetCodeLocation(test_name);
+
     typedef typename Tests::Head Head;
 
     // First, register the first test in 'Test' for each type in 'Types'.
     TypeParameterizedTest<Fixture, Head, Types>::Register(
-        prefix, case_name, test_names, 0);
+        prefix, test_location, case_name, test_names, 0);
 
     // Next, recurses (at compile time) with the tail of the test list.
     return TypeParameterizedTestCase<Fixture, typename Tests::Tail, Types>
-        ::Register(prefix, case_name, SkipComma(test_names));
+        ::Register(prefix, code_location, state,
+                   case_name, SkipComma(test_names));
   }
 };
 
@@ -629,8 +704,9 @@ class TypeParameterizedTestCase {
 template <GTEST_TEMPLATE_ Fixture, typename Types>
 class TypeParameterizedTestCase<Fixture, Templates0, Types> {
  public:
-  static bool Register(const char* /*prefix*/, const char* /*case_name*/,
-                       const char* /*test_names*/) {
+  static bool Register(const char* /*prefix*/, CodeLocation,
+                       const TypedTestCasePState* /*state*/,
+                       const char* /*case_name*/, const char* /*test_names*/) {
     return true;
   }
 };
@@ -784,7 +860,7 @@ class ImplicitlyConvertible {
   // MakeFrom() is an expression whose type is From.  We cannot simply
   // use From(), as the type From may not have a public default
   // constructor.
-  static From MakeFrom();
+  static typename AddReference<From>::type MakeFrom();
 
   // These two functions are overloaded.  Given an expression
   // Helper(x), the compiler will pick the first version if x can be
@@ -802,25 +878,20 @@ class ImplicitlyConvertible {
   // We have to put the 'public' section after the 'private' section,
   // or MSVC refuses to compile the code.
  public:
-  // MSVC warns about implicitly converting from double to int for
-  // possible loss of data, so we need to temporarily disable the
-  // warning.
-#ifdef _MSC_VER
-# pragma warning(push)          // Saves the current warning state.
-# pragma warning(disable:4244)  // Temporarily disables warning 4244.
-
-  static const bool value =
-      sizeof(Helper(ImplicitlyConvertible::MakeFrom())) == 1;
-# pragma warning(pop)           // Restores the warning state.
-#elif defined(__BORLANDC__)
+#if defined(__BORLANDC__)
   // C++Builder cannot use member overload resolution during template
   // instantiation.  The simplest workaround is to use its C++0x type traits
   // functions (C++Builder 2009 and above only).
   static const bool value = __is_convertible(From, To);
 #else
+  // MSVC warns about implicitly converting from double to int for
+  // possible loss of data, so we need to temporarily disable the
+  // warning.
+  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4244)
   static const bool value =
       sizeof(Helper(ImplicitlyConvertible::MakeFrom())) == 1;
-#endif  // _MSV_VER
+  GTEST_DISABLE_MSC_WARNINGS_POP_()
+#endif  // __BORLANDC__
 };
 template <typename From, typename To>
 const bool ImplicitlyConvertible<From, To>::value;
@@ -946,11 +1017,10 @@ void CopyArray(const T* from, size_t size, U* to) {
 
 // The relation between an NativeArray object (see below) and the
 // native array it represents.
-enum RelationToSource {
-  kReference,  // The NativeArray references the native array.
-  kCopy        // The NativeArray makes a copy of the native array and
-               // owns the copy.
-};
+// We use 2 different structs to allow non-copyable types to be used, as long
+// as RelationToSourceReference() is passed.
+struct RelationToSourceReference {};
+struct RelationToSourceCopy {};
 
 // Adapts a native array to a read-only STL-style container.  Instead
 // of the complete STL container concept, this adaptor only implements
@@ -968,22 +1038,23 @@ class NativeArray {
   typedef Element* iterator;
   typedef const Element* const_iterator;
 
-  // Constructs from a native array.
-  NativeArray(const Element* array, size_t count, RelationToSource relation) {
-    Init(array, count, relation);
+  // Constructs from a native array. References the source.
+  NativeArray(const Element* array, size_t count, RelationToSourceReference) {
+    InitRef(array, count);
+  }
+
+  // Constructs from a native array. Copies the source.
+  NativeArray(const Element* array, size_t count, RelationToSourceCopy) {
+    InitCopy(array, count);
   }
 
   // Copy constructor.
   NativeArray(const NativeArray& rhs) {
-    Init(rhs.array_, rhs.size_, rhs.relation_to_source_);
+    (this->*rhs.clone_)(rhs.array_, rhs.size_);
   }
 
   ~NativeArray() {
-    // Ensures that the user doesn't instantiate NativeArray with a
-    // const or reference type.
-    static_cast<void>(StaticAssertTypeEqHelper<Element,
-        GTEST_REMOVE_REFERENCE_AND_CONST_(Element)>());
-    if (relation_to_source_ == kCopy)
+    if (clone_ != &NativeArray::InitRef)
       delete[] array_;
   }
 
@@ -997,23 +1068,30 @@ class NativeArray {
   }
 
  private:
-  // Initializes this object; makes a copy of the input array if
-  // 'relation' is kCopy.
-  void Init(const Element* array, size_t a_size, RelationToSource relation) {
-    if (relation == kReference) {
-      array_ = array;
-    } else {
-      Element* const copy = new Element[a_size];
-      CopyArray(array, a_size, copy);
-      array_ = copy;
-    }
+  enum {
+    kCheckTypeIsNotConstOrAReference = StaticAssertTypeEqHelper<
+        Element, GTEST_REMOVE_REFERENCE_AND_CONST_(Element)>::value,
+  };
+
+  // Initializes this object with a copy of the input.
+  void InitCopy(const Element* array, size_t a_size) {
+    Element* const copy = new Element[a_size];
+    CopyArray(array, a_size, copy);
+    array_ = copy;
+    size_ = a_size;
+    clone_ = &NativeArray::InitCopy;
+  }
+
+  // Initializes this object with a reference of the input.
+  void InitRef(const Element* array, size_t a_size) {
+    array_ = array;
     size_ = a_size;
-    relation_to_source_ = relation;
+    clone_ = &NativeArray::InitRef;
   }
 
   const Element* array_;
   size_t size_;
-  RelationToSource relation_to_source_;
+  void (NativeArray::*clone_)(const Element*, size_t);
 
   GTEST_DISALLOW_ASSIGN_(NativeArray);
 };
@@ -1148,6 +1226,7 @@ class GTEST_TEST_CLASS_NAME_(test_case_name, test_name) : public parent_class {\
   ::test_info_ =\
     ::testing::internal::MakeAndRegisterTestInfo(\
         #test_case_name, #test_name, NULL, NULL, \
+        ::testing::internal::CodeLocation(__FILE__, __LINE__), \
         (parent_id), \
         parent_class::SetUpTestCase, \
         parent_class::TearDownTestCase, \
diff --git a/src/gtest/include/gtest/internal/gtest-linked_ptr.h b/src/gtest/include/gtest/internal/gtest-linked_ptr.h
index b1362cd002c..36029422174 100644
--- a/src/gtest/include/gtest/internal/gtest-linked_ptr.h
+++ b/src/gtest/include/gtest/internal/gtest-linked_ptr.h
@@ -110,7 +110,12 @@ class linked_ptr_internal {
     MutexLock lock(&g_linked_ptr_mutex);
 
     linked_ptr_internal const* p = ptr;
-    while (p->next_ != ptr) p = p->next_;
+    while (p->next_ != ptr) {
+      assert(p->next_ != this &&
+             "Trying to join() a linked ring we are already in. "
+             "Is GMock thread safety enabled?");
+      p = p->next_;
+    }
     p->next_ = this;
     next_ = ptr;
   }
@@ -123,7 +128,12 @@ class linked_ptr_internal {
 
     if (next_ == this) return true;
     linked_ptr_internal const* p = next_;
-    while (p->next_ != this) p = p->next_;
+    while (p->next_ != this) {
+      assert(p->next_ != next_ &&
+             "Trying to depart() a linked ring we are not in. "
+             "Is GMock thread safety enabled?");
+      p = p->next_;
+    }
     p->next_ = next_;
     return false;
   }
diff --git a/src/gtest/include/gtest/internal/gtest-param-util-generated.h b/src/gtest/include/gtest/internal/gtest-param-util-generated.h
index e80548592c7..4d1d81d20ff 100644
--- a/src/gtest/include/gtest/internal/gtest-param-util-generated.h
+++ b/src/gtest/include/gtest/internal/gtest-param-util-generated.h
@@ -40,7 +40,7 @@
 // and at most 10 arguments in Combine. Please contact
 // googletestframework@googlegroups.com if you need more.
 // Please note that the number of arguments to Combine is limited
-// by the maximum arity of the implementation of tr1::tuple which is
+// by the maximum arity of the implementation of tuple which is
 // currently set at 10.
 
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_GENERATED_H_
@@ -79,7 +79,10 @@ class ValueArray1 {
   explicit ValueArray1(T1 v1) : v1_(v1) {}
 
   template <typename T>
-  operator ParamGenerator<T>() const { return ValuesIn(&v1_, &v1_ + 1); }
+  operator ParamGenerator<T>() const {
+    const T array[] = {static_cast<T>(v1_)};
+    return ValuesIn(array);
+  }
 
  private:
   // No implementation - assignment is unsupported.
@@ -3157,9 +3160,9 @@ class ValueArray50 {
 //
 template <typename T1, typename T2>
 class CartesianProductGenerator2
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2> > {
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2> ParamType;
+  typedef ::testing::tuple<T1, T2> ParamType;
 
   CartesianProductGenerator2(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2)
@@ -3272,9 +3275,9 @@ class CartesianProductGenerator2
 
 template <typename T1, typename T2, typename T3>
 class CartesianProductGenerator3
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3> > {
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3> ParamType;
+  typedef ::testing::tuple<T1, T2, T3> ParamType;
 
   CartesianProductGenerator3(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3)
@@ -3404,9 +3407,9 @@ class CartesianProductGenerator3
 
 template <typename T1, typename T2, typename T3, typename T4>
 class CartesianProductGenerator4
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4> > {
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4> ParamType;
 
   CartesianProductGenerator4(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -3555,9 +3558,9 @@ class CartesianProductGenerator4
 
 template <typename T1, typename T2, typename T3, typename T4, typename T5>
 class CartesianProductGenerator5
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5> > {
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5> ParamType;
 
   CartesianProductGenerator5(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -3723,10 +3726,10 @@ class CartesianProductGenerator5
 template <typename T1, typename T2, typename T3, typename T4, typename T5,
     typename T6>
 class CartesianProductGenerator6
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5,
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5,
         T6> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5, T6> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5, T6> ParamType;
 
   CartesianProductGenerator6(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -3909,10 +3912,10 @@ class CartesianProductGenerator6
 template <typename T1, typename T2, typename T3, typename T4, typename T5,
     typename T6, typename T7>
 class CartesianProductGenerator7
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6,
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5, T6,
         T7> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5, T6, T7> ParamType;
 
   CartesianProductGenerator7(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -4112,10 +4115,10 @@ class CartesianProductGenerator7
 template <typename T1, typename T2, typename T3, typename T4, typename T5,
     typename T6, typename T7, typename T8>
 class CartesianProductGenerator8
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6,
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5, T6,
         T7, T8> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8> ParamType;
 
   CartesianProductGenerator8(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -4334,10 +4337,10 @@ class CartesianProductGenerator8
 template <typename T1, typename T2, typename T3, typename T4, typename T5,
     typename T6, typename T7, typename T8, typename T9>
 class CartesianProductGenerator9
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6,
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5, T6,
         T7, T8, T9> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9> ParamType;
 
   CartesianProductGenerator9(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -4573,10 +4576,10 @@ class CartesianProductGenerator9
 template <typename T1, typename T2, typename T3, typename T4, typename T5,
     typename T6, typename T7, typename T8, typename T9, typename T10>
 class CartesianProductGenerator10
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6,
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5, T6,
         T7, T8, T9, T10> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> ParamType;
 
   CartesianProductGenerator10(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -4838,8 +4841,8 @@ class CartesianProductHolder2 {
 CartesianProductHolder2(const Generator1& g1, const Generator2& g2)
       : g1_(g1), g2_(g2) {}
   template <typename T1, typename T2>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2> >(
         new CartesianProductGenerator2<T1, T2>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_)));
@@ -4860,8 +4863,8 @@ CartesianProductHolder3(const Generator1& g1, const Generator2& g2,
     const Generator3& g3)
       : g1_(g1), g2_(g2), g3_(g3) {}
   template <typename T1, typename T2, typename T3>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2, T3> >(
         new CartesianProductGenerator3<T1, T2, T3>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -4885,8 +4888,8 @@ CartesianProductHolder4(const Generator1& g1, const Generator2& g2,
     const Generator3& g3, const Generator4& g4)
       : g1_(g1), g2_(g2), g3_(g3), g4_(g4) {}
   template <typename T1, typename T2, typename T3, typename T4>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4> >(
         new CartesianProductGenerator4<T1, T2, T3, T4>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -4912,8 +4915,8 @@ CartesianProductHolder5(const Generator1& g1, const Generator2& g2,
     const Generator3& g3, const Generator4& g4, const Generator5& g5)
       : g1_(g1), g2_(g2), g3_(g3), g4_(g4), g5_(g5) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5> >(
         new CartesianProductGenerator5<T1, T2, T3, T4, T5>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -4943,8 +4946,8 @@ CartesianProductHolder6(const Generator1& g1, const Generator2& g2,
       : g1_(g1), g2_(g2), g3_(g3), g4_(g4), g5_(g5), g6_(g6) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5,
       typename T6>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6> >(
         new CartesianProductGenerator6<T1, T2, T3, T4, T5, T6>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -4976,9 +4979,9 @@ CartesianProductHolder7(const Generator1& g1, const Generator2& g2,
       : g1_(g1), g2_(g2), g3_(g3), g4_(g4), g5_(g5), g6_(g6), g7_(g7) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5,
       typename T6, typename T7>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6,
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6,
       T7> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7> >(
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7> >(
         new CartesianProductGenerator7<T1, T2, T3, T4, T5, T6, T7>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -5014,9 +5017,9 @@ CartesianProductHolder8(const Generator1& g1, const Generator2& g2,
           g8_(g8) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5,
       typename T6, typename T7, typename T8>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7,
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7,
       T8> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8> >(
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8> >(
         new CartesianProductGenerator8<T1, T2, T3, T4, T5, T6, T7, T8>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -5055,9 +5058,9 @@ CartesianProductHolder9(const Generator1& g1, const Generator2& g2,
           g9_(g9) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5,
       typename T6, typename T7, typename T8, typename T9>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
       T9> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
         T9> >(
         new CartesianProductGenerator9<T1, T2, T3, T4, T5, T6, T7, T8, T9>(
         static_cast<ParamGenerator<T1> >(g1_),
@@ -5099,10 +5102,10 @@ CartesianProductHolder10(const Generator1& g1, const Generator2& g2,
           g9_(g9), g10_(g10) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5,
       typename T6, typename T7, typename T8, typename T9, typename T10>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
-      T9, T10> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
-        T9, T10> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9,
+      T10> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9,
+        T10> >(
         new CartesianProductGenerator10<T1, T2, T3, T4, T5, T6, T7, T8, T9,
             T10>(
         static_cast<ParamGenerator<T1> >(g1_),
diff --git a/src/gtest/include/gtest/internal/gtest-param-util-generated.h.pump b/src/gtest/include/gtest/internal/gtest-param-util-generated.h.pump
index 009206fd319..5c7c47af0bb 100644
--- a/src/gtest/include/gtest/internal/gtest-param-util-generated.h.pump
+++ b/src/gtest/include/gtest/internal/gtest-param-util-generated.h.pump
@@ -39,7 +39,7 @@ $var maxtuple = 10  $$ Maximum number of Combine arguments we want to support.
 // and at most $maxtuple arguments in Combine. Please contact
 // googletestframework@googlegroups.com if you need more.
 // Please note that the number of arguments to Combine is limited
-// by the maximum arity of the implementation of tr1::tuple which is
+// by the maximum arity of the implementation of tuple which is
 // currently set at $maxtuple.
 
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_GENERATED_H_
@@ -72,29 +72,14 @@ internal::ParamGenerator<typename Container::value_type> ValuesIn(
 namespace internal {
 
 // Used in the Values() function to provide polymorphic capabilities.
-template <typename T1>
-class ValueArray1 {
- public:
-  explicit ValueArray1(T1 v1) : v1_(v1) {}
-
-  template <typename T>
-  operator ParamGenerator<T>() const { return ValuesIn(&v1_, &v1_ + 1); }
-
- private:
-  // No implementation - assignment is unsupported.
-  void operator=(const ValueArray1& other);
-
-  const T1 v1_;
-};
-
-$range i 2..n
+$range i 1..n
 $for i [[
 $range j 1..i
 
 template <$for j, [[typename T$j]]>
 class ValueArray$i {
  public:
-  ValueArray$i($for j, [[T$j v$j]]) : $for j, [[v$(j)_(v$j)]] {}
+  $if i==1 [[explicit ]]ValueArray$i($for j, [[T$j v$j]]) : $for j, [[v$(j)_(v$j)]] {}
 
   template <typename T>
   operator ParamGenerator<T>() const {
@@ -128,9 +113,9 @@ $range k 2..i
 
 template <$for j, [[typename T$j]]>
 class CartesianProductGenerator$i
-    : public ParamGeneratorInterface< ::std::tr1::tuple<$for j, [[T$j]]> > {
+    : public ParamGeneratorInterface< ::testing::tuple<$for j, [[T$j]]> > {
  public:
-  typedef ::std::tr1::tuple<$for j, [[T$j]]> ParamType;
+  typedef ::testing::tuple<$for j, [[T$j]]> ParamType;
 
   CartesianProductGenerator$i($for j, [[const ParamGenerator<T$j>& g$j]])
       : $for j, [[g$(j)_(g$j)]] {}
@@ -269,8 +254,8 @@ class CartesianProductHolder$i {
 CartesianProductHolder$i($for j, [[const Generator$j& g$j]])
       : $for j, [[g$(j)_(g$j)]] {}
   template <$for j, [[typename T$j]]>
-  operator ParamGenerator< ::std::tr1::tuple<$for j, [[T$j]]> >() const {
-    return ParamGenerator< ::std::tr1::tuple<$for j, [[T$j]]> >(
+  operator ParamGenerator< ::testing::tuple<$for j, [[T$j]]> >() const {
+    return ParamGenerator< ::testing::tuple<$for j, [[T$j]]> >(
         new CartesianProductGenerator$i<$for j, [[T$j]]>(
 $for j,[[
 
diff --git a/src/gtest/include/gtest/internal/gtest-param-util.h b/src/gtest/include/gtest/internal/gtest-param-util.h
index d5e1028b0c1..82cab9b0201 100644
--- a/src/gtest/include/gtest/internal/gtest-param-util.h
+++ b/src/gtest/include/gtest/internal/gtest-param-util.h
@@ -34,7 +34,10 @@
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
 #define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
 
+#include <ctype.h>
+
 #include <iterator>
+#include <set>
 #include <utility>
 #include <vector>
 
@@ -49,6 +52,27 @@
 #if GTEST_HAS_PARAM_TEST
 
 namespace testing {
+
+// Input to a parameterized test name generator, describing a test parameter.
+// Consists of the parameter value and the integer parameter index.
+template <class ParamType>
+struct TestParamInfo {
+  TestParamInfo(const ParamType& a_param, size_t an_index) :
+    param(a_param),
+    index(an_index) {}
+  ParamType param;
+  size_t index;
+};
+
+// A builtin parameterized test name generator which returns the result of
+// testing::PrintToString.
+struct PrintToStringParamName {
+  template <class ParamType>
+  std::string operator()(const TestParamInfo<ParamType>& info) const {
+    return PrintToString(info.param);
+  }
+};
+
 namespace internal {
 
 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
@@ -58,7 +82,7 @@ namespace internal {
 // TEST_P macro is used to define two tests with the same name
 // but in different namespaces.
 GTEST_API_ void ReportInvalidTestCaseType(const char* test_case_name,
-                                          const char* file, int line);
+                                          CodeLocation code_location);
 
 template <typename> class ParamGeneratorInterface;
 template <typename> class ParamGenerator;
@@ -206,7 +230,7 @@ class RangeGenerator : public ParamGeneratorInterface<T> {
       return base_;
     }
     virtual void Advance() {
-      value_ = value_ + step_;
+      value_ = static_cast<T>(value_ + step_);
       index_++;
     }
     virtual ParamIteratorInterface<T>* Clone() const {
@@ -243,7 +267,7 @@ class RangeGenerator : public ParamGeneratorInterface<T> {
                                const T& end,
                                const IncrementT& step) {
     int end_index = 0;
-    for (T i = begin; i < end; i = i + step)
+    for (T i = begin; i < end; i = static_cast<T>(i + step))
       end_index++;
     return end_index;
   }
@@ -347,6 +371,37 @@ class ValuesInIteratorRangeGenerator : public ParamGeneratorInterface<T> {
 
 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
 //
+// Default parameterized test name generator, returns a string containing the
+// integer test parameter index.
+template <class ParamType>
+std::string DefaultParamName(const TestParamInfo<ParamType>& info) {
+  Message name_stream;
+  name_stream << info.index;
+  return name_stream.GetString();
+}
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// Parameterized test name overload helpers, which help the
+// INSTANTIATE_TEST_CASE_P macro choose between the default parameterized
+// test name generator and user param name generator.
+template <class ParamType, class ParamNameGenFunctor>
+ParamNameGenFunctor GetParamNameGen(ParamNameGenFunctor func) {
+  return func;
+}
+
+template <class ParamType>
+struct ParamNameGenFunc {
+  typedef std::string Type(const TestParamInfo<ParamType>&);
+};
+
+template <class ParamType>
+typename ParamNameGenFunc<ParamType>::Type *GetParamNameGen() {
+  return DefaultParamName;
+}
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
 // Stores a parameter value and later creates tests parameterized with that
 // value.
 template <class TestClass>
@@ -449,9 +504,11 @@ class ParameterizedTestCaseInfo : public ParameterizedTestCaseInfoBase {
   typedef typename TestCase::ParamType ParamType;
   // A function that returns an instance of appropriate generator type.
   typedef ParamGenerator<ParamType>(GeneratorCreationFunc)();
+  typedef typename ParamNameGenFunc<ParamType>::Type ParamNameGeneratorFunc;
 
-  explicit ParameterizedTestCaseInfo(const char* name)
-      : test_case_name_(name) {}
+  explicit ParameterizedTestCaseInfo(
+      const char* name, CodeLocation code_location)
+      : test_case_name_(name), code_location_(code_location) {}
 
   // Test case base name for display purposes.
   virtual const string& GetTestCaseName() const { return test_case_name_; }
@@ -474,9 +531,11 @@ class ParameterizedTestCaseInfo : public ParameterizedTestCaseInfoBase {
   // about a generator.
   int AddTestCaseInstantiation(const string& instantiation_name,
                                GeneratorCreationFunc* func,
-                               const char* /* file */,
-                               int /* line */) {
-    instantiations_.push_back(::std::make_pair(instantiation_name, func));
+                               ParamNameGeneratorFunc* name_func,
+                               const char* file,
+                               int line) {
+    instantiations_.push_back(
+        InstantiationInfo(instantiation_name, func, name_func, file, line));
     return 0;  // Return value used only to run this method in namespace scope.
   }
   // UnitTest class invokes this method to register tests in this test case
@@ -491,25 +550,45 @@ class ParameterizedTestCaseInfo : public ParameterizedTestCaseInfoBase {
       for (typename InstantiationContainer::iterator gen_it =
                instantiations_.begin(); gen_it != instantiations_.end();
                ++gen_it) {
-        const string& instantiation_name = gen_it->first;
-        ParamGenerator<ParamType> generator((*gen_it->second)());
+        const string& instantiation_name = gen_it->name;
+        ParamGenerator<ParamType> generator((*gen_it->generator)());
+        ParamNameGeneratorFunc* name_func = gen_it->name_func;
+        const char* file = gen_it->file;
+        int line = gen_it->line;
 
         string test_case_name;
         if ( !instantiation_name.empty() )
           test_case_name = instantiation_name + "/";
         test_case_name += test_info->test_case_base_name;
 
-        int i = 0;
+        size_t i = 0;
+        std::set<std::string> test_param_names;
         for (typename ParamGenerator<ParamType>::iterator param_it =
                  generator.begin();
              param_it != generator.end(); ++param_it, ++i) {
           Message test_name_stream;
-          test_name_stream << test_info->test_base_name << "/" << i;
+
+          std::string param_name = name_func(
+              TestParamInfo<ParamType>(*param_it, i));
+
+          GTEST_CHECK_(IsValidParamName(param_name))
+              << "Parameterized test name '" << param_name
+              << "' is invalid, in " << file
+              << " line " << line << std::endl;
+
+          GTEST_CHECK_(test_param_names.count(param_name) == 0)
+              << "Duplicate parameterized test name '" << param_name
+              << "', in " << file << " line " << line << std::endl;
+
+          test_param_names.insert(param_name);
+
+          test_name_stream << test_info->test_base_name << "/" << param_name;
           MakeAndRegisterTestInfo(
               test_case_name.c_str(),
               test_name_stream.GetString().c_str(),
               NULL,  // No type parameter.
               PrintToString(*param_it).c_str(),
+              code_location_,
               GetTestCaseTypeId(),
               TestCase::SetUpTestCase,
               TestCase::TearDownTestCase,
@@ -535,12 +614,45 @@ class ParameterizedTestCaseInfo : public ParameterizedTestCaseInfoBase {
     const scoped_ptr<TestMetaFactoryBase<ParamType> > test_meta_factory;
   };
   typedef ::std::vector<linked_ptr<TestInfo> > TestInfoContainer;
-  // Keeps pairs of <Instantiation name, Sequence generator creation function>
-  // received from INSTANTIATE_TEST_CASE_P macros.
-  typedef ::std::vector<std::pair<string, GeneratorCreationFunc*> >
-      InstantiationContainer;
+  // Records data received from INSTANTIATE_TEST_CASE_P macros:
+  //  <Instantiation name, Sequence generator creation function,
+  //     Name generator function, Source file, Source line>
+  struct InstantiationInfo {
+      InstantiationInfo(const std::string &name_in,
+                        GeneratorCreationFunc* generator_in,
+                        ParamNameGeneratorFunc* name_func_in,
+                        const char* file_in,
+                        int line_in)
+          : name(name_in),
+            generator(generator_in),
+            name_func(name_func_in),
+            file(file_in),
+            line(line_in) {}
+
+      std::string name;
+      GeneratorCreationFunc* generator;
+      ParamNameGeneratorFunc* name_func;
+      const char* file;
+      int line;
+  };
+  typedef ::std::vector<InstantiationInfo> InstantiationContainer;
+
+  static bool IsValidParamName(const std::string& name) {
+    // Check for empty string
+    if (name.empty())
+      return false;
+
+    // Check for invalid characters
+    for (std::string::size_type index = 0; index < name.size(); ++index) {
+      if (!isalnum(name[index]) && name[index] != '_')
+        return false;
+    }
+
+    return true;
+  }
 
   const string test_case_name_;
+  CodeLocation code_location_;
   TestInfoContainer tests_;
   InstantiationContainer instantiations_;
 
@@ -568,8 +680,7 @@ class ParameterizedTestCaseRegistry {
   template <class TestCase>
   ParameterizedTestCaseInfo<TestCase>* GetTestCasePatternHolder(
       const char* test_case_name,
-      const char* file,
-      int line) {
+      CodeLocation code_location) {
     ParameterizedTestCaseInfo<TestCase>* typed_test_info = NULL;
     for (TestCaseInfoContainer::iterator it = test_case_infos_.begin();
          it != test_case_infos_.end(); ++it) {
@@ -578,7 +689,7 @@ class ParameterizedTestCaseRegistry {
           // Complain about incorrect usage of Google Test facilities
           // and terminate the program since we cannot guaranty correct
           // test case setup and tear-down in this case.
-          ReportInvalidTestCaseType(test_case_name,  file, line);
+          ReportInvalidTestCaseType(test_case_name, code_location);
           posix::Abort();
         } else {
           // At this point we are sure that the object we found is of the same
@@ -591,7 +702,8 @@ class ParameterizedTestCaseRegistry {
       }
     }
     if (typed_test_info == NULL) {
-      typed_test_info = new ParameterizedTestCaseInfo<TestCase>(test_case_name);
+      typed_test_info = new ParameterizedTestCaseInfo<TestCase>(
+          test_case_name, code_location);
       test_case_infos_.push_back(typed_test_info);
     }
     return typed_test_info;
diff --git a/src/gtest/include/gtest/internal/gtest-port-arch.h b/src/gtest/include/gtest/internal/gtest-port-arch.h
new file mode 100644
index 00000000000..74ab949057c
--- /dev/null
+++ b/src/gtest/include/gtest/internal/gtest-port-arch.h
@@ -0,0 +1,93 @@
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// The Google C++ Testing Framework (Google Test)
+//
+// This header file defines the GTEST_OS_* macro.
+// It is separate from gtest-port.h so that custom/gtest-port.h can include it.
+
+#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
+#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
+
+// Determines the platform on which Google Test is compiled.
+#ifdef __CYGWIN__
+# define GTEST_OS_CYGWIN 1
+#elif defined __SYMBIAN32__
+# define GTEST_OS_SYMBIAN 1
+#elif defined _WIN32
+# define GTEST_OS_WINDOWS 1
+# ifdef _WIN32_WCE
+#  define GTEST_OS_WINDOWS_MOBILE 1
+# elif defined(__MINGW__) || defined(__MINGW32__)
+#  define GTEST_OS_WINDOWS_MINGW 1
+# elif defined(WINAPI_FAMILY)
+#  include <winapifamily.h>
+#  if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#   define GTEST_OS_WINDOWS_DESKTOP 1
+#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
+#   define GTEST_OS_WINDOWS_PHONE 1
+#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
+#   define GTEST_OS_WINDOWS_RT 1
+#  else
+    // WINAPI_FAMILY defined but no known partition matched.
+    // Default to desktop.
+#   define GTEST_OS_WINDOWS_DESKTOP 1
+#  endif
+# else
+#  define GTEST_OS_WINDOWS_DESKTOP 1
+# endif  // _WIN32_WCE
+#elif defined __APPLE__
+# define GTEST_OS_MAC 1
+# if TARGET_OS_IPHONE
+#  define GTEST_OS_IOS 1
+# endif
+#elif defined __FreeBSD__
+# define GTEST_OS_FREEBSD 1
+#elif defined __linux__
+# define GTEST_OS_LINUX 1
+# if defined __ANDROID__
+#  define GTEST_OS_LINUX_ANDROID 1
+# endif
+#elif defined __MVS__
+# define GTEST_OS_ZOS 1
+#elif defined(__sun) && defined(__SVR4)
+# define GTEST_OS_SOLARIS 1
+#elif defined(_AIX)
+# define GTEST_OS_AIX 1
+#elif defined(__hpux)
+# define GTEST_OS_HPUX 1
+#elif defined __native_client__
+# define GTEST_OS_NACL 1
+#elif defined __OpenBSD__
+# define GTEST_OS_OPENBSD 1
+#elif defined __QNX__
+# define GTEST_OS_QNX 1
+#endif  // __CYGWIN__
+
+#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
diff --git a/src/gtest/include/gtest/internal/gtest-port.h b/src/gtest/include/gtest/internal/gtest-port.h
index 90e06525f63..0094ed5077e 100644
--- a/src/gtest/include/gtest/internal/gtest-port.h
+++ b/src/gtest/include/gtest/internal/gtest-port.h
@@ -30,8 +30,11 @@
 // Authors: wan@google.com (Zhanyong Wan)
 //
 // Low-level types and utilities for porting Google Test to various
-// platforms.  They are subject to change without notice.  DO NOT USE
-// THEM IN USER CODE.
+// platforms.  All macros ending with _ and symbols defined in an
+// internal namespace are subject to change without notice.  Code
+// outside Google Test MUST NOT USE THEM DIRECTLY.  Macros that don't
+// end with _ are part of Google Test's public API and can be used by
+// code outside Google Test.
 //
 // This file is fundamental to Google Test.  All other Google Test source
 // files are expected to #include this.  Therefore, it cannot #include
@@ -40,9 +43,30 @@
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
 #define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
 
-// The user can define the following macros in the build script to
-// control Google Test's behavior.  If the user doesn't define a macro
-// in this list, Google Test will define it.
+// Environment-describing macros
+// -----------------------------
+//
+// Google Test can be used in many different environments.  Macros in
+// this section tell Google Test what kind of environment it is being
+// used in, such that Google Test can provide environment-specific
+// features and implementations.
+//
+// Google Test tries to automatically detect the properties of its
+// environment, so users usually don't need to worry about these
+// macros.  However, the automatic detection is not perfect.
+// Sometimes it's necessary for a user to define some of the following
+// macros in the build script to override Google Test's decisions.
+//
+// If the user doesn't define a macro in the list, Google Test will
+// provide a default definition.  After this header is #included, all
+// macros in this list will be defined to either 1 or 0.
+//
+// Notes to maintainers:
+//   - Each macro here is a user-tweakable knob; do not grow the list
+//     lightly.
+//   - Use #if to key off these macros.  Don't use #ifdef or "#if
+//     defined(...)", which will not work as these macros are ALWAYS
+//     defined.
 //
 //   GTEST_HAS_CLONE          - Define it to 1/0 to indicate that clone(2)
 //                              is/isn't available.
@@ -86,18 +110,23 @@
 //                            - Define to 1 when compiling Google Test itself
 //                              as a shared library.
 
-// This header defines the following utilities:
+// Platform-indicating macros
+// --------------------------
+//
+// Macros indicating the platform on which Google Test is being used
+// (a macro is defined to 1 if compiled on the given platform;
+// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
+// defines these macros automatically.  Code outside Google Test MUST
+// NOT define them.
 //
-// Macros indicating the current platform (defined to 1 if compiled on
-// the given platform; otherwise undefined):
 //   GTEST_OS_AIX      - IBM AIX
 //   GTEST_OS_CYGWIN   - Cygwin
+//   GTEST_OS_FREEBSD  - FreeBSD
 //   GTEST_OS_HPUX     - HP-UX
 //   GTEST_OS_LINUX    - Linux
 //     GTEST_OS_LINUX_ANDROID - Google Android
 //   GTEST_OS_MAC      - Mac OS X
 //     GTEST_OS_IOS    - iOS
-//       GTEST_OS_IOS_SIMULATOR - iOS simulator
 //   GTEST_OS_NACL     - Google Native Client (NaCl)
 //   GTEST_OS_OPENBSD  - OpenBSD
 //   GTEST_OS_QNX      - QNX
@@ -107,6 +136,8 @@
 //     GTEST_OS_WINDOWS_DESKTOP  - Windows Desktop
 //     GTEST_OS_WINDOWS_MINGW    - MinGW
 //     GTEST_OS_WINDOWS_MOBILE   - Windows Mobile
+//     GTEST_OS_WINDOWS_PHONE    - Windows Phone
+//     GTEST_OS_WINDOWS_RT       - Windows Store App/WinRT
 //   GTEST_OS_ZOS      - z/OS
 //
 // Among the platforms, Cygwin, Linux, Max OS X, and Windows have the
@@ -116,22 +147,50 @@
 // 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.
+// It is possible that none of the GTEST_OS_* macros are defined.
+
+// Feature-indicating macros
+// -------------------------
+//
+// Macros indicating which Google Test features are available (a macro
+// is defined to 1 if the corresponding feature is supported;
+// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
+// defines these macros automatically.  Code outside Google Test MUST
+// NOT define them.
+//
+// These macros are public so that portable tests can be written.
+// Such tests typically surround code using a feature with an #if
+// which controls that code.  For example:
+//
+// #if GTEST_HAS_DEATH_TEST
+//   EXPECT_DEATH(DoSomethingDeadly());
+// #endif
 //
-// 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_IS_THREADSAFE    - Google Test is thread-safe.
 //   GTEST_USES_POSIX_RE    - enhanced POSIX regex is used. Do not confuse with
 //                            GTEST_HAS_POSIX_RE (see above) which users can
 //                            define themselves.
 //   GTEST_USES_SIMPLE_RE   - our own simple regex is used;
 //                            the above two are mutually exclusive.
 //   GTEST_CAN_COMPARE_NULL - accepts untyped NULL in EXPECT_EQ().
+
+// Misc public macros
+// ------------------
+//
+//   GTEST_FLAG(flag_name)  - references the variable corresponding to
+//                            the given Google Test flag.
+
+// Internal utilities
+// ------------------
+//
+// The following macros and utilities are for Google Test's INTERNAL
+// use only.  Code outside Google Test MUST NOT USE THEM DIRECTLY.
 //
 // Macros for basic C++ coding:
 //   GTEST_AMBIGUOUS_ELSE_BLOCKER_ - for disabling a gcc warning.
@@ -140,13 +199,18 @@
 //   GTEST_DISALLOW_ASSIGN_   - disables operator=.
 //   GTEST_DISALLOW_COPY_AND_ASSIGN_ - disables copy ctor and operator=.
 //   GTEST_MUST_USE_RESULT_   - declares that a function's result must be used.
+//   GTEST_INTENTIONAL_CONST_COND_PUSH_ - start code section where MSVC C4127 is
+//                                        suppressed (constant conditional).
+//   GTEST_INTENTIONAL_CONST_COND_POP_  - finish code section where MSVC C4127
+//                                        is suppressed.
+//
+// C++11 feature wrappers:
+//
+//   testing::internal::move  - portability wrapper for std::move.
 //
 // Synchronization:
 //   Mutex, MutexLock, ThreadLocal, GetThreadCount()
-//                  - synchronization primitives.
-//   GTEST_IS_THREADSAFE - defined to 1 to indicate that the above
-//                         synchronization primitives have real implementations
-//                         and Google Test is thread-safe; or 0 otherwise.
+//                            - synchronization primitives.
 //
 // Template meta programming:
 //   is_pointer     - as in TR1; needed on Symbian and IBM XL C/C++ only.
@@ -176,13 +240,12 @@
 //                         string.
 //
 // Integer types:
-//   TypeWithSize   - maps an integer to an int type.
+//   TypeWithSize   - maps an integer to a int type.
 //   Int32, UInt32, Int64, UInt64, TimeInMillis
 //                  - integers of known sizes.
 //   BiggestInt     - the biggest signed integer type.
 //
 // Command-line utilities:
-//   GTEST_FLAG()       - references a flag.
 //   GTEST_DECLARE_*()  - declares a flag.
 //   GTEST_DEFINE_*()   - defines a flag.
 //   GetInjectableArgvs() - returns the command line as a vector of strings.
@@ -208,16 +271,28 @@
 # include <TargetConditionals.h>
 #endif
 
+#include <algorithm>  // NOLINT
 #include <iostream>  // NOLINT
 #include <sstream>  // NOLINT
 #include <string>  // NOLINT
+#include <utility>
+#include <vector>  // NOLINT
 
-#define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
-#define GTEST_FLAG_PREFIX_ "gtest_"
-#define GTEST_FLAG_PREFIX_DASH_ "gtest-"
-#define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
-#define GTEST_NAME_ "Google Test"
-#define GTEST_PROJECT_URL_ "http://code.google.com/p/googletest/"
+#include "gtest/internal/gtest-port-arch.h"
+#include "gtest/internal/custom/gtest-port.h"
+
+#if !defined(GTEST_DEV_EMAIL_)
+# define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
+# define GTEST_FLAG_PREFIX_ "gtest_"
+# define GTEST_FLAG_PREFIX_DASH_ "gtest-"
+# define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
+# define GTEST_NAME_ "Google Test"
+# define GTEST_PROJECT_URL_ "https://github.com/google/googletest/"
+#endif  // !defined(GTEST_DEV_EMAIL_)
+
+#if !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
+# define GTEST_INIT_GOOGLE_TEST_NAME_ "testing::InitGoogleTest"
+#endif  // !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
 
 // Determines the version of gcc that is used to compile this.
 #ifdef __GNUC__
@@ -226,48 +301,22 @@
     (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__)
 #endif  // __GNUC__
 
-// Determines the platform on which Google Test is compiled.
-#ifdef __CYGWIN__
-# define GTEST_OS_CYGWIN 1
-#elif defined __SYMBIAN32__
-# define GTEST_OS_SYMBIAN 1
-#elif defined _WIN32
-# define GTEST_OS_WINDOWS 1
-# ifdef _WIN32_WCE
-#  define GTEST_OS_WINDOWS_MOBILE 1
-# elif defined(__MINGW__) || defined(__MINGW32__)
-#  define GTEST_OS_WINDOWS_MINGW 1
-# else
-#  define GTEST_OS_WINDOWS_DESKTOP 1
-# endif  // _WIN32_WCE
-#elif defined __APPLE__
-# define GTEST_OS_MAC 1
-# if TARGET_OS_IPHONE
-#  define GTEST_OS_IOS 1
-#  if TARGET_IPHONE_SIMULATOR
-#   define GTEST_OS_IOS_SIMULATOR 1
-#  endif
-# endif
-#elif defined __linux__
-# define GTEST_OS_LINUX 1
-# if defined __ANDROID__
-#  define GTEST_OS_LINUX_ANDROID 1
-# endif
-#elif defined __MVS__
-# define GTEST_OS_ZOS 1
-#elif defined(__sun) && defined(__SVR4)
-# define GTEST_OS_SOLARIS 1
-#elif defined(_AIX)
-# define GTEST_OS_AIX 1
-#elif defined(__hpux)
-# define GTEST_OS_HPUX 1
-#elif defined __native_client__
-# define GTEST_OS_NACL 1
-#elif defined __OpenBSD__
-# define GTEST_OS_OPENBSD 1
-#elif defined __QNX__
-# define GTEST_OS_QNX 1
-#endif  // __CYGWIN__
+// Macros for disabling Microsoft Visual C++ warnings.
+//
+//   GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 4385)
+//   /* code that triggers warnings C4800 and C4385 */
+//   GTEST_DISABLE_MSC_WARNINGS_POP_()
+#if _MSC_VER >= 1500
+# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings) \
+    __pragma(warning(push))                        \
+    __pragma(warning(disable: warnings))
+# define GTEST_DISABLE_MSC_WARNINGS_POP_()          \
+    __pragma(warning(pop))
+#else
+// Older versions of MSVC don't have __pragma.
+# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings)
+# define GTEST_DISABLE_MSC_WARNINGS_POP_()
+#endif
 
 #ifndef GTEST_LANG_CXX11
 // gcc and clang define __GXX_EXPERIMENTAL_CXX0X__ when
@@ -282,19 +331,82 @@
 # endif
 #endif
 
+// Distinct from C++11 language support, some environments don't provide
+// proper C++11 library support. Notably, it's possible to build in
+// C++11 mode when targeting Mac OS X 10.6, which has an old libstdc++
+// with no C++11 support.
+//
+// libstdc++ has sufficient C++11 support as of GCC 4.6.0, __GLIBCXX__
+// 20110325, but maintenance releases in the 4.4 and 4.5 series followed
+// this date, so check for those versions by their date stamps.
+// https://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html#abi.versioning
+#if GTEST_LANG_CXX11 && \
+    (!defined(__GLIBCXX__) || ( \
+        __GLIBCXX__ >= 20110325ul &&  /* GCC >= 4.6.0 */ \
+        /* Blacklist of patch releases of older branches: */ \
+        __GLIBCXX__ != 20110416ul &&  /* GCC 4.4.6 */ \
+        __GLIBCXX__ != 20120313ul &&  /* GCC 4.4.7 */ \
+        __GLIBCXX__ != 20110428ul &&  /* GCC 4.5.3 */ \
+        __GLIBCXX__ != 20120702ul))   /* GCC 4.5.4 */
+# define GTEST_STDLIB_CXX11 1
+#endif
+
+// Only use C++11 library features if the library provides them.
+#if GTEST_STDLIB_CXX11
+# define GTEST_HAS_STD_BEGIN_AND_END_ 1
+# define GTEST_HAS_STD_FORWARD_LIST_ 1
+# define GTEST_HAS_STD_FUNCTION_ 1
+# define GTEST_HAS_STD_INITIALIZER_LIST_ 1
+# define GTEST_HAS_STD_MOVE_ 1
+# define GTEST_HAS_STD_SHARED_PTR_ 1
+# define GTEST_HAS_STD_TYPE_TRAITS_ 1
+# define GTEST_HAS_STD_UNIQUE_PTR_ 1
+#endif
+
+// C++11 specifies that <tuple> provides std::tuple.
+// Some platforms still might not have it, however.
+#if GTEST_LANG_CXX11
+# define GTEST_HAS_STD_TUPLE_ 1
+# if defined(__clang__)
+// Inspired by http://clang.llvm.org/docs/LanguageExtensions.html#__has_include
+#  if defined(__has_include) && !__has_include(<tuple>)
+#   undef GTEST_HAS_STD_TUPLE_
+#  endif
+# elif defined(_MSC_VER)
+// Inspired by boost/config/stdlib/dinkumware.hpp
+#  if defined(_CPPLIB_VER) && _CPPLIB_VER < 520
+#   undef GTEST_HAS_STD_TUPLE_
+#  endif
+# elif defined(__GLIBCXX__)
+// Inspired by boost/config/stdlib/libstdcpp3.hpp,
+// http://gcc.gnu.org/gcc-4.2/changes.html and
+// http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt01ch01.html#manual.intro.status.standard.200x
+#  if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
+#   undef GTEST_HAS_STD_TUPLE_
+#  endif
+# endif
+#endif
+
 // Brings in definitions for functions used in the testing::internal::posix
 // namespace (read, write, close, chdir, isatty, stat). We do not currently
 // use them on Windows Mobile.
-#if !GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
+# if !GTEST_OS_WINDOWS_MOBILE
+#  include <direct.h>
+#  include <io.h>
+# endif
+// In order to avoid having to include <windows.h>, use forward declaration
+// assuming CRITICAL_SECTION is a typedef of _RTL_CRITICAL_SECTION.
+// This assumption is verified by
+// WindowsTypesTest.CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION.
+struct _RTL_CRITICAL_SECTION;
+#else
 // This assumes that non-Windows OSes provide unistd.h. For OSes where this
 // is not the case, we need to include headers that provide the functions
 // mentioned above.
 # include <unistd.h>
 # include <strings.h>
-#elif !GTEST_OS_WINDOWS_MOBILE
-# include <direct.h>
-# include <io.h>
-#endif
+#endif  // GTEST_OS_WINDOWS
 
 #if GTEST_OS_LINUX_ANDROID
 // Used to define __ANDROID_API__ matching the target NDK API level.
@@ -311,7 +423,10 @@
 # endif
 #endif
 
-#if GTEST_HAS_POSIX_RE
+#if GTEST_USES_PCRE
+// The appropriate headers have already been included.
+
+#elif GTEST_HAS_POSIX_RE
 
 // On some platforms, <regex.h> needs someone to define size_t, and
 // won't compile otherwise.  We can #include it here as we already
@@ -333,7 +448,7 @@
 // simple regex implementation instead.
 # define GTEST_USES_SIMPLE_RE 1
 
-#endif  // GTEST_HAS_POSIX_RE
+#endif  // GTEST_USES_PCRE
 
 #ifndef GTEST_HAS_EXCEPTIONS
 // The user didn't tell us whether exceptions are enabled, so we need
@@ -346,6 +461,15 @@
 #   define _HAS_EXCEPTIONS 1
 #  endif  // _HAS_EXCEPTIONS
 #  define GTEST_HAS_EXCEPTIONS _HAS_EXCEPTIONS
+# elif defined(__clang__)
+// clang defines __EXCEPTIONS iff exceptions are enabled before clang 220714,
+// but iff cleanups are enabled after that. In Obj-C++ files, there can be
+// cleanups for ObjC exceptions which also need cleanups, even if C++ exceptions
+// are disabled. clang has __has_feature(cxx_exceptions) which checks for C++
+// exceptions starting at clang r206352, but which checked for cleanups prior to
+// that. To reliably check for C++ exception availability with clang, check for
+// __EXCEPTIONS && __has_feature(cxx_exceptions).
+#  define GTEST_HAS_EXCEPTIONS (__EXCEPTIONS && __has_feature(cxx_exceptions))
 # elif defined(__GNUC__) && __EXCEPTIONS
 // gcc defines __EXCEPTIONS to 1 iff exceptions are enabled.
 #  define GTEST_HAS_EXCEPTIONS 1
@@ -471,13 +595,13 @@
 
 // Determines whether Google Test can use the pthreads library.
 #ifndef GTEST_HAS_PTHREAD
-// The user didn't tell us explicitly, so we assume pthreads support is
-// available on Linux and Mac.
+// The user didn't tell us explicitly, so we make reasonable assumptions about
+// which platforms have pthreads support.
 //
 // To disable threading support in Google Test, add -DGTEST_HAS_PTHREAD=0
 // to your compiler flags.
 # define GTEST_HAS_PTHREAD (GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_HPUX \
-    || GTEST_OS_QNX)
+    || GTEST_OS_QNX || GTEST_OS_FREEBSD || GTEST_OS_NACL)
 #endif  // GTEST_HAS_PTHREAD
 
 #if GTEST_HAS_PTHREAD
@@ -489,6 +613,15 @@
 # include <time.h>  // NOLINT
 #endif
 
+// Determines if hash_map/hash_set are available.
+// Only used for testing against those containers.
+#if !defined(GTEST_HAS_HASH_MAP_)
+# if _MSC_VER
+#  define GTEST_HAS_HASH_MAP_ 1  // Indicates that hash_map is available.
+#  define GTEST_HAS_HASH_SET_ 1  // Indicates that hash_set is available.
+# endif  // _MSC_VER
+#endif  // !defined(GTEST_HAS_HASH_MAP_)
+
 // Determines whether Google Test can use tr1/tuple.  You can define
 // this macro to 0 to prevent Google Test from using tuple (any
 // feature depending on tuple with be disabled in this mode).
@@ -539,11 +672,21 @@
 
 // To avoid conditional compilation everywhere, we make it
 // gtest-port.h's responsibility to #include the header implementing
-// tr1/tuple.
+// tuple.
+#if GTEST_HAS_STD_TUPLE_
+# include <tuple>  // IWYU pragma: export
+# define GTEST_TUPLE_NAMESPACE_ ::std
+#endif  // GTEST_HAS_STD_TUPLE_
+
+// We include tr1::tuple even if std::tuple is available to define printers for
+// them.
 #if GTEST_HAS_TR1_TUPLE
+# ifndef GTEST_TUPLE_NAMESPACE_
+#  define GTEST_TUPLE_NAMESPACE_ ::std::tr1
+# endif  // GTEST_TUPLE_NAMESPACE_
 
 # if GTEST_USE_OWN_TR1_TUPLE
-#  include "gtest/internal/gtest-tuple.h"
+#  include "gtest/internal/gtest-tuple.h"  // IWYU pragma: export  // NOLINT
 # elif GTEST_ENV_HAS_STD_TUPLE_
 #  include <tuple>
 // C++11 puts its tuple into the ::std namespace rather than
@@ -574,7 +717,7 @@ using ::std::tuple_size;
 // This prevents <boost/tr1/detail/config.hpp>, which defines
 // BOOST_HAS_TR1_TUPLE, from being #included by Boost's <tuple>.
 #  define BOOST_TR1_DETAIL_CONFIG_HPP_INCLUDED
-#  include <tuple>
+#  include <tuple>  // IWYU pragma: export  // NOLINT
 
 # elif defined(__GNUC__) && (GTEST_GCC_VER_ >= 40000)
 // GCC 4.0+ implements tr1/tuple in the <tr1/tuple> header.  This does
@@ -597,7 +740,7 @@ using ::std::tuple_size;
 # else
 // If the compiler is not GCC 4.0+, we assume the user is using a
 // spec-conforming TR1 implementation.
-#  include <tuple>  // NOLINT
+#  include <tuple>  // IWYU pragma: export  // NOLINT
 # endif  // GTEST_USE_OWN_TR1_TUPLE
 
 #endif  // GTEST_HAS_TR1_TUPLE
@@ -631,7 +774,8 @@ using ::std::tuple_size;
 #ifndef GTEST_HAS_STREAM_REDIRECTION
 // By default, we assume that stream redirection is supported on all
 // platforms except known mobile ones.
-# if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_SYMBIAN
+# if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_SYMBIAN || \
+    GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT
 #  define GTEST_HAS_STREAM_REDIRECTION 0
 # else
 #  define GTEST_HAS_STREAM_REDIRECTION 1
@@ -643,12 +787,11 @@ using ::std::tuple_size;
 // 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_OS_LINUX || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS || \
-     (GTEST_OS_MAC && !GTEST_OS_IOS) || GTEST_OS_IOS_SIMULATOR || \
+     (GTEST_OS_MAC && !GTEST_OS_IOS) || \
      (GTEST_OS_WINDOWS_DESKTOP && _MSC_VER >= 1400) || \
      GTEST_OS_WINDOWS_MINGW || GTEST_OS_AIX || GTEST_OS_HPUX || \
-     GTEST_OS_OPENBSD || GTEST_OS_QNX)
+     GTEST_OS_OPENBSD || GTEST_OS_QNX || GTEST_OS_FREEBSD)
 # define GTEST_HAS_DEATH_TEST 1
-# include <vector>  // NOLINT
 #endif
 
 // We don't support MSVC 7.1 with exceptions disabled now.  Therefore
@@ -712,7 +855,12 @@ using ::std::tuple_size;
 // compiler the variable/parameter does not have to be used.
 #if defined(__GNUC__) && !defined(COMPILER_ICC)
 # define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
-#else
+#elif defined(__clang__)
+# if __has_attribute(unused)
+#  define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
+# endif
+#endif
+#ifndef GTEST_ATTRIBUTE_UNUSED_
 # define GTEST_ATTRIBUTE_UNUSED_
 #endif
 
@@ -738,6 +886,19 @@ using ::std::tuple_size;
 # define GTEST_MUST_USE_RESULT_
 #endif  // __GNUC__ && (GTEST_GCC_VER_ >= 30400) && !COMPILER_ICC
 
+// MS C++ compiler emits warning when a conditional expression is compile time
+// constant. In some contexts this warning is false positive and needs to be
+// suppressed. Use the following two macros in such cases:
+//
+// GTEST_INTENTIONAL_CONST_COND_PUSH_()
+// while (true) {
+// GTEST_INTENTIONAL_CONST_COND_POP_()
+// }
+# define GTEST_INTENTIONAL_CONST_COND_PUSH_() \
+    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127)
+# define GTEST_INTENTIONAL_CONST_COND_POP_() \
+    GTEST_DISABLE_MSC_WARNINGS_POP_()
+
 // Determine whether the compiler supports Microsoft's Structured Exception
 // Handling.  This is supported by several Windows compilers but generally
 // does not exist on any other system.
@@ -752,17 +913,22 @@ using ::std::tuple_size;
 #  define GTEST_HAS_SEH 0
 # endif
 
+#define GTEST_IS_THREADSAFE \
+    (GTEST_HAS_MUTEX_AND_THREAD_LOCAL_ \
+     || (GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT) \
+     || GTEST_HAS_PTHREAD)
+
 #endif  // GTEST_HAS_SEH
 
 #ifdef _MSC_VER
-
 # if GTEST_LINKED_AS_SHARED_LIBRARY
 #  define GTEST_API_ __declspec(dllimport)
 # elif GTEST_CREATE_SHARED_LIBRARY
 #  define GTEST_API_ __declspec(dllexport)
 # endif
-
-#endif  // _MSC_VER
+#elif __GNUC__ >= 4 || defined(__clang__)
+# define GTEST_API_ __attribute__((visibility ("default")))
+#endif // _MSC_VER
 
 #ifndef GTEST_API_
 # define GTEST_API_
@@ -782,10 +948,58 @@ using ::std::tuple_size;
 # define GTEST_HAS_CXXABI_H_ 0
 #endif
 
+// A function level attribute to disable checking for use of uninitialized
+// memory when built with MemorySanitizer.
+#if defined(__clang__)
+# if __has_feature(memory_sanitizer)
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_ \
+       __attribute__((no_sanitize_memory))
+# else
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+# endif  // __has_feature(memory_sanitizer)
+#else
+# define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+#endif  // __clang__
+
+// A function level attribute to disable AddressSanitizer instrumentation.
+#if defined(__clang__)
+# if __has_feature(address_sanitizer)
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_ \
+       __attribute__((no_sanitize_address))
+# else
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+# endif  // __has_feature(address_sanitizer)
+#else
+# define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+#endif  // __clang__
+
+// A function level attribute to disable ThreadSanitizer instrumentation.
+#if defined(__clang__)
+# if __has_feature(thread_sanitizer)
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_ \
+       __attribute__((no_sanitize_thread))
+# else
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
+# endif  // __has_feature(thread_sanitizer)
+#else
+# define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
+#endif  // __clang__
+
 namespace testing {
 
 class Message;
 
+#if defined(GTEST_TUPLE_NAMESPACE_)
+// Import tuple and friends into the ::testing namespace.
+// It is part of our interface, having them in ::testing allows us to change
+// their types as needed.
+using GTEST_TUPLE_NAMESPACE_::get;
+using GTEST_TUPLE_NAMESPACE_::make_tuple;
+using GTEST_TUPLE_NAMESPACE_::tuple;
+using GTEST_TUPLE_NAMESPACE_::tuple_size;
+using GTEST_TUPLE_NAMESPACE_::tuple_element;
+#endif  // defined(GTEST_TUPLE_NAMESPACE_)
+
 namespace internal {
 
 // A secret type that Google Test users don't know about.  It has no
@@ -797,8 +1011,8 @@ class Secret;
 // expression is true. For example, you could use it to verify the
 // size of a static array:
 //
-//   GTEST_COMPILE_ASSERT_(ARRAYSIZE(content_type_names) == CONTENT_NUM_TYPES,
-//                         content_type_names_incorrect_size);
+//   GTEST_COMPILE_ASSERT_(GTEST_ARRAY_SIZE_(names) == NUM_NAMES,
+//                         names_incorrect_size);
 //
 // or to make sure a struct is smaller than a certain size:
 //
@@ -808,16 +1022,22 @@ class Secret;
 // the expression is false, most compilers will issue a warning/error
 // containing the name of the variable.
 
+#if GTEST_LANG_CXX11
+# define GTEST_COMPILE_ASSERT_(expr, msg) static_assert(expr, #msg)
+#else  // !GTEST_LANG_CXX11
 template <bool>
-struct CompileAssert {
+  struct CompileAssert {
 };
 
-#define GTEST_COMPILE_ASSERT_(expr, msg) \
+# define GTEST_COMPILE_ASSERT_(expr, msg) \
   typedef ::testing::internal::CompileAssert<(static_cast<bool>(expr))> \
       msg[static_cast<bool>(expr) ? 1 : -1] GTEST_ATTRIBUTE_UNUSED_
+#endif  // !GTEST_LANG_CXX11
 
 // Implementation details of GTEST_COMPILE_ASSERT_:
 //
+// (In C++11, we simply use static_assert instead of the following)
+//
 // - GTEST_COMPILE_ASSERT_ works by defining an array type that has -1
 //   elements (and thus is invalid) when the expression is false.
 //
@@ -864,7 +1084,12 @@ template <typename T1, typename T2>
 struct StaticAssertTypeEqHelper;
 
 template <typename T>
-struct StaticAssertTypeEqHelper<T, T> {};
+struct StaticAssertTypeEqHelper<T, T> {
+  enum { value = true };
+};
+
+// Evaluates to the number of elements in 'array'.
+#define GTEST_ARRAY_SIZE_(array) (sizeof(array) / sizeof(array[0]))
 
 #if GTEST_HAS_GLOBAL_STRING
 typedef ::string string;
@@ -913,6 +1138,11 @@ class scoped_ptr {
     }
   }
 
+  friend void swap(scoped_ptr& a, scoped_ptr& b) {
+    using std::swap;
+    swap(a.ptr_, b.ptr_);
+  }
+
  private:
   T* ptr_;
 
@@ -1036,13 +1266,18 @@ class GTEST_API_ GTestLog {
   GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestLog);
 };
 
-#define GTEST_LOG_(severity) \
+#if !defined(GTEST_LOG_)
+
+# define GTEST_LOG_(severity) \
     ::testing::internal::GTestLog(::testing::internal::GTEST_##severity, \
                                   __FILE__, __LINE__).GetStream()
 
 inline void LogToStderr() {}
 inline void FlushInfoLog() { fflush(NULL); }
 
+#endif  // !defined(GTEST_LOG_)
+
+#if !defined(GTEST_CHECK_)
 // INTERNAL IMPLEMENTATION - DO NOT USE.
 //
 // GTEST_CHECK_ is an all-mode assert. It aborts the program if the condition
@@ -1057,12 +1292,13 @@ inline void FlushInfoLog() { fflush(NULL); }
 //    condition itself, plus additional message streamed into it, if any,
 //    and then it aborts the program. It aborts the program irrespective of
 //    whether it is built in the debug mode or not.
-#define GTEST_CHECK_(condition) \
+# define GTEST_CHECK_(condition) \
     GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
     if (::testing::internal::IsTrue(condition)) \
       ; \
     else \
       GTEST_LOG_(FATAL) << "Condition " #condition " failed. "
+#endif  // !defined(GTEST_CHECK_)
 
 // An all-mode assert to verify that the given POSIX-style function
 // call returns 0 (indicating success).  Known limitation: this
@@ -1074,6 +1310,15 @@ inline void FlushInfoLog() { fflush(NULL); }
     GTEST_LOG_(FATAL) << #posix_call << "failed with error " \
                       << gtest_error
 
+#if GTEST_HAS_STD_MOVE_
+using std::move;
+#else  // GTEST_HAS_STD_MOVE_
+template <typename T>
+const T& move(const T& t) {
+  return t;
+}
+#endif  // GTEST_HAS_STD_MOVE_
+
 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
 //
 // Use ImplicitCast_ as a safe version of static_cast for upcasting in
@@ -1124,7 +1369,9 @@ inline To DownCast_(From* f) {  // so we only accept pointers
   // for compile-time type checking, and has no overhead in an
   // optimized build at run-time, as it will be optimized away
   // completely.
+  GTEST_INTENTIONAL_CONST_COND_PUSH_()
   if (false) {
+  GTEST_INTENTIONAL_CONST_COND_POP_()
     const To to = NULL;
     ::testing::internal::ImplicitCast_<From*>(to);
   }
@@ -1145,6 +1392,11 @@ template <class Derived, class Base>
 Derived* CheckedDowncastToActualType(Base* base) {
 #if GTEST_HAS_RTTI
   GTEST_CHECK_(typeid(*base) == typeid(Derived));
+#endif
+
+#if GTEST_HAS_DOWNCAST_
+  return ::down_cast<Derived*>(base);
+#elif GTEST_HAS_RTTI
   return dynamic_cast<Derived*>(base);  // NOLINT
 #else
   return static_cast<Derived*>(base);  // Poor man's downcast.
@@ -1166,6 +1418,17 @@ GTEST_API_ std::string GetCapturedStderr();
 
 #endif  // GTEST_HAS_STREAM_REDIRECTION
 
+// Returns a path to temporary directory.
+GTEST_API_ std::string TempDir();
+
+// Returns the size (in bytes) of a file.
+GTEST_API_ size_t GetFileSize(FILE* file);
+
+// Reads the entire content of a file as a string.
+GTEST_API_ std::string ReadEntireFile(FILE* file);
+
+// All command line arguments.
+GTEST_API_ const ::std::vector<testing::internal::string>& GetArgvs();
 
 #if GTEST_HAS_DEATH_TEST
 
@@ -1173,18 +1436,15 @@ const ::std::vector<testing::internal::string>& GetInjectableArgvs();
 void SetInjectableArgvs(const ::std::vector<testing::internal::string>*
                              new_argvs);
 
-// A copy of all command line arguments.  Set by InitGoogleTest().
-extern ::std::vector<testing::internal::string> g_argvs;
 
 #endif  // GTEST_HAS_DEATH_TEST
 
 // Defines synchronization primitives.
-
-#if GTEST_HAS_PTHREAD
-
-// Sleeps for (roughly) n milli-seconds.  This function is only for
-// testing Google Test's own constructs.  Don't use it in user tests,
-// either directly or indirectly.
+#if GTEST_IS_THREADSAFE
+# if GTEST_HAS_PTHREAD
+// Sleeps for (roughly) n milliseconds.  This function is only for testing
+// Google Test's own constructs.  Don't use it in user tests, either
+// directly or indirectly.
 inline void SleepMilliseconds(int n) {
   const timespec time = {
     0,                  // 0 seconds.
@@ -1192,7 +1452,13 @@ inline void SleepMilliseconds(int n) {
   };
   nanosleep(&time, NULL);
 }
+# endif  // GTEST_HAS_PTHREAD
 
+# if GTEST_HAS_NOTIFICATION_
+// Notification has already been imported into the namespace.
+// Nothing to do here.
+
+# elif GTEST_HAS_PTHREAD
 // Allows a controller thread to pause execution of newly created
 // threads until notified.  Instances of this class must be created
 // and destroyed in the controller thread.
@@ -1236,6 +1502,62 @@ class Notification {
   GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
 };
 
+# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
+
+GTEST_API_ void SleepMilliseconds(int n);
+
+// Provides leak-safe Windows kernel handle ownership.
+// Used in death tests and in threading support.
+class GTEST_API_ AutoHandle {
+ public:
+  // Assume that Win32 HANDLE type is equivalent to void*. Doing so allows us to
+  // avoid including <windows.h> in this header file. Including <windows.h> is
+  // undesirable because it defines a lot of symbols and macros that tend to
+  // conflict with client code. This assumption is verified by
+  // WindowsTypesTest.HANDLEIsVoidStar.
+  typedef void* Handle;
+  AutoHandle();
+  explicit AutoHandle(Handle handle);
+
+  ~AutoHandle();
+
+  Handle Get() const;
+  void Reset();
+  void Reset(Handle handle);
+
+ private:
+  // Returns true iff the handle is a valid handle object that can be closed.
+  bool IsCloseable() const;
+
+  Handle handle_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(AutoHandle);
+};
+
+// Allows a controller thread to pause execution of newly created
+// threads until notified.  Instances of this class must be created
+// and destroyed in the controller thread.
+//
+// This class is only for testing Google Test's own constructs. Do not
+// use it in user tests, either directly or indirectly.
+class GTEST_API_ Notification {
+ public:
+  Notification();
+  void Notify();
+  void WaitForNotification();
+
+ private:
+  AutoHandle event_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
+};
+# endif  // GTEST_HAS_NOTIFICATION_
+
+// On MinGW, we can have both GTEST_OS_WINDOWS and GTEST_HAS_PTHREAD
+// defined, but we don't want to use MinGW's pthreads implementation, which
+// has conformance problems with some versions of the POSIX standard.
+# if GTEST_HAS_PTHREAD && !GTEST_OS_WINDOWS_MINGW
+
 // As a C-function, ThreadFuncWithCLinkage cannot be templated itself.
 // Consequently, it cannot select a correct instantiation of ThreadWithParam
 // in order to call its Run(). Introducing ThreadWithParamBase as a
@@ -1273,10 +1595,9 @@ extern "C" inline void* ThreadFuncWithCLinkage(void* thread) {
 template <typename T>
 class ThreadWithParam : public ThreadWithParamBase {
  public:
-  typedef void (*UserThreadFunc)(T);
+  typedef void UserThreadFunc(T);
 
-  ThreadWithParam(
-      UserThreadFunc func, T param, Notification* thread_can_start)
+  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
       : func_(func),
         param_(param),
         thread_can_start_(thread_can_start),
@@ -1303,7 +1624,7 @@ class ThreadWithParam : public ThreadWithParamBase {
   }
 
  private:
-  const UserThreadFunc func_;  // User-supplied thread function.
+  UserThreadFunc* const func_;  // User-supplied thread function.
   const T param_;  // User-supplied parameter to the thread function.
   // When non-NULL, used to block execution until the controller thread
   // notifies.
@@ -1313,26 +1634,293 @@ class ThreadWithParam : public ThreadWithParamBase {
 
   GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
 };
+# endif  // !GTEST_OS_WINDOWS && GTEST_HAS_PTHREAD ||
+         // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
+
+# if GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
+// Mutex and ThreadLocal have already been imported into the namespace.
+// Nothing to do here.
+
+# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
 
-// MutexBase and Mutex implement mutex on pthreads-based platforms. They
-// are used in conjunction with class MutexLock:
+// Mutex implements mutex on Windows platforms.  It is used in conjunction
+// with class MutexLock:
 //
 //   Mutex mutex;
 //   ...
-//   MutexLock lock(&mutex);  // Acquires the mutex and releases it at the end
-//                            // of the current scope.
-//
-// MutexBase implements behavior for both statically and dynamically
-// allocated mutexes.  Do not use MutexBase directly.  Instead, write
-// the following to define a static mutex:
+//   MutexLock lock(&mutex);  // Acquires the mutex and releases it at the
+//                            // end of the current scope.
 //
+// A static Mutex *must* be defined or declared using one of the following
+// macros:
 //   GTEST_DEFINE_STATIC_MUTEX_(g_some_mutex);
+//   GTEST_DECLARE_STATIC_MUTEX_(g_some_mutex);
+//
+// (A non-static Mutex is defined/declared in the usual way).
+class GTEST_API_ Mutex {
+ public:
+  enum MutexType { kStatic = 0, kDynamic = 1 };
+  // We rely on kStaticMutex being 0 as it is to what the linker initializes
+  // type_ in static mutexes.  critical_section_ will be initialized lazily
+  // in ThreadSafeLazyInit().
+  enum StaticConstructorSelector { kStaticMutex = 0 };
+
+  // This constructor intentionally does nothing.  It relies on type_ being
+  // statically initialized to 0 (effectively setting it to kStatic) and on
+  // ThreadSafeLazyInit() to lazily initialize the rest of the members.
+  explicit Mutex(StaticConstructorSelector /*dummy*/) {}
+
+  Mutex();
+  ~Mutex();
+
+  void Lock();
+
+  void Unlock();
+
+  // Does nothing if the current thread holds the mutex. Otherwise, crashes
+  // with high probability.
+  void AssertHeld();
+
+ private:
+  // Initializes owner_thread_id_ and critical_section_ in static mutexes.
+  void ThreadSafeLazyInit();
+
+  // Per http://blogs.msdn.com/b/oldnewthing/archive/2004/02/23/78395.aspx,
+  // we assume that 0 is an invalid value for thread IDs.
+  unsigned int owner_thread_id_;
+
+  // For static mutexes, we rely on these members being initialized to zeros
+  // by the linker.
+  MutexType type_;
+  long critical_section_init_phase_;  // NOLINT
+  _RTL_CRITICAL_SECTION* critical_section_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
+};
+
+# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
+    extern ::testing::internal::Mutex mutex
+
+# define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
+    ::testing::internal::Mutex mutex(::testing::internal::Mutex::kStaticMutex)
+
+// We cannot name this class MutexLock because the ctor declaration would
+// conflict with a macro named MutexLock, which is defined on some
+// platforms. That macro is used as a defensive measure to prevent against
+// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
+// "MutexLock l(&mu)".  Hence the typedef trick below.
+class GTestMutexLock {
+ public:
+  explicit GTestMutexLock(Mutex* mutex)
+      : mutex_(mutex) { mutex_->Lock(); }
+
+  ~GTestMutexLock() { mutex_->Unlock(); }
+
+ private:
+  Mutex* const mutex_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
+};
+
+typedef GTestMutexLock MutexLock;
+
+// Base class for ValueHolder<T>.  Allows a caller to hold and delete a value
+// without knowing its type.
+class ThreadLocalValueHolderBase {
+ public:
+  virtual ~ThreadLocalValueHolderBase() {}
+};
+
+// Provides a way for a thread to send notifications to a ThreadLocal
+// regardless of its parameter type.
+class ThreadLocalBase {
+ public:
+  // Creates a new ValueHolder<T> object holding a default value passed to
+  // this ThreadLocal<T>'s constructor and returns it.  It is the caller's
+  // responsibility not to call this when the ThreadLocal<T> instance already
+  // has a value on the current thread.
+  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const = 0;
+
+ protected:
+  ThreadLocalBase() {}
+  virtual ~ThreadLocalBase() {}
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocalBase);
+};
+
+// Maps a thread to a set of ThreadLocals that have values instantiated on that
+// thread and notifies them when the thread exits.  A ThreadLocal instance is
+// expected to persist until all threads it has values on have terminated.
+class GTEST_API_ ThreadLocalRegistry {
+ public:
+  // Registers thread_local_instance as having value on the current thread.
+  // Returns a value that can be used to identify the thread from other threads.
+  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
+      const ThreadLocalBase* thread_local_instance);
+
+  // Invoked when a ThreadLocal instance is destroyed.
+  static void OnThreadLocalDestroyed(
+      const ThreadLocalBase* thread_local_instance);
+};
+
+class GTEST_API_ ThreadWithParamBase {
+ public:
+  void Join();
+
+ protected:
+  class Runnable {
+   public:
+    virtual ~Runnable() {}
+    virtual void Run() = 0;
+  };
+
+  ThreadWithParamBase(Runnable *runnable, Notification* thread_can_start);
+  virtual ~ThreadWithParamBase();
+
+ private:
+  AutoHandle thread_;
+};
+
+// Helper class for testing Google Test's multi-threading constructs.
+template <typename T>
+class ThreadWithParam : public ThreadWithParamBase {
+ public:
+  typedef void UserThreadFunc(T);
+
+  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
+      : ThreadWithParamBase(new RunnableImpl(func, param), thread_can_start) {
+  }
+  virtual ~ThreadWithParam() {}
+
+ private:
+  class RunnableImpl : public Runnable {
+   public:
+    RunnableImpl(UserThreadFunc* func, T param)
+        : func_(func),
+          param_(param) {
+    }
+    virtual ~RunnableImpl() {}
+    virtual void Run() {
+      func_(param_);
+    }
+
+   private:
+    UserThreadFunc* const func_;
+    const T param_;
+
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(RunnableImpl);
+  };
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
+};
+
+// Implements thread-local storage on Windows systems.
 //
-// You can forward declare a static mutex like this:
+//   // Thread 1
+//   ThreadLocal<int> tl(100);  // 100 is the default value for each thread.
 //
-//   GTEST_DECLARE_STATIC_MUTEX_(g_some_mutex);
+//   // Thread 2
+//   tl.set(150);  // Changes the value for thread 2 only.
+//   EXPECT_EQ(150, tl.get());
 //
-// To create a dynamic mutex, just define an object of type Mutex.
+//   // Thread 1
+//   EXPECT_EQ(100, tl.get());  // In thread 1, tl has the original value.
+//   tl.set(200);
+//   EXPECT_EQ(200, tl.get());
+//
+// The template type argument T must have a public copy constructor.
+// In addition, the default ThreadLocal constructor requires T to have
+// a public default constructor.
+//
+// The users of a TheadLocal instance have to make sure that all but one
+// threads (including the main one) using that instance have exited before
+// destroying it. Otherwise, the per-thread objects managed for them by the
+// ThreadLocal instance are not guaranteed to be destroyed on all platforms.
+//
+// Google Test only uses global ThreadLocal objects.  That means they
+// will die after main() has returned.  Therefore, no per-thread
+// object managed by Google Test will be leaked as long as all threads
+// using Google Test have exited when main() returns.
+template <typename T>
+class ThreadLocal : public ThreadLocalBase {
+ public:
+  ThreadLocal() : default_factory_(new DefaultValueHolderFactory()) {}
+  explicit ThreadLocal(const T& value)
+      : default_factory_(new InstanceValueHolderFactory(value)) {}
+
+  ~ThreadLocal() { ThreadLocalRegistry::OnThreadLocalDestroyed(this); }
+
+  T* pointer() { return GetOrCreateValue(); }
+  const T* pointer() const { return GetOrCreateValue(); }
+  const T& get() const { return *pointer(); }
+  void set(const T& value) { *pointer() = value; }
+
+ private:
+  // Holds a value of T.  Can be deleted via its base class without the caller
+  // knowing the type of T.
+  class ValueHolder : public ThreadLocalValueHolderBase {
+   public:
+    ValueHolder() : value_() {}
+    explicit ValueHolder(const T& value) : value_(value) {}
+
+    T* pointer() { return &value_; }
+
+   private:
+    T value_;
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
+  };
+
+
+  T* GetOrCreateValue() const {
+    return static_cast<ValueHolder*>(
+        ThreadLocalRegistry::GetValueOnCurrentThread(this))->pointer();
+  }
+
+  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const {
+    return default_factory_->MakeNewHolder();
+  }
+
+  class ValueHolderFactory {
+   public:
+    ValueHolderFactory() {}
+    virtual ~ValueHolderFactory() {}
+    virtual ValueHolder* MakeNewHolder() const = 0;
+
+   private:
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
+  };
+
+  class DefaultValueHolderFactory : public ValueHolderFactory {
+   public:
+    DefaultValueHolderFactory() {}
+    virtual ValueHolder* MakeNewHolder() const { return new ValueHolder(); }
+
+   private:
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
+  };
+
+  class InstanceValueHolderFactory : public ValueHolderFactory {
+   public:
+    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
+    virtual ValueHolder* MakeNewHolder() const {
+      return new ValueHolder(value_);
+    }
+
+   private:
+    const T value_;  // The value for each thread.
+
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
+  };
+
+  scoped_ptr<ValueHolderFactory> default_factory_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
+};
+
+# elif GTEST_HAS_PTHREAD
+
+// MutexBase and Mutex implement mutex on pthreads-based platforms.
 class MutexBase {
  public:
   // Acquires this mutex.
@@ -1377,17 +1965,12 @@ class MutexBase {
 };
 
 // Forward-declares a static mutex.
-# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-    extern ::testing::internal::MutexBase mutex
+#  define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
+     extern ::testing::internal::MutexBase mutex
 
 // Defines and statically (i.e. at link time) initializes a static mutex.
-// The initialization list here does not explicitly initialize each field,
-// instead relying on default initialization for the unspecified fields. In
-// particular, the owner_ field (a pthread_t) is not explicitly initialized.
-// This allows initialization to work whether pthread_t is a scalar or struct.
-// The flag -Wmissing-field-initializers must not be specified for this to work.
-# define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
-    ::testing::internal::MutexBase mutex = { PTHREAD_MUTEX_INITIALIZER, false }
+#  define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
+     ::testing::internal::MutexBase mutex = { PTHREAD_MUTEX_INITIALIZER, false, pthread_t() }
 
 // The Mutex class can only be used for mutexes created at runtime. It
 // shares its API with MutexBase otherwise.
@@ -1405,9 +1988,11 @@ class Mutex : public MutexBase {
   GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
 };
 
-// We cannot name this class MutexLock as the ctor declaration would
+// We cannot name this class MutexLock because the ctor declaration would
 // conflict with a macro named MutexLock, which is defined on some
-// platforms.  Hence the typedef trick below.
+// platforms. That macro is used as a defensive measure to prevent against
+// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
+// "MutexLock l(&mu)".  Hence the typedef trick below.
 class GTestMutexLock {
  public:
   explicit GTestMutexLock(MutexBase* mutex)
@@ -1441,41 +2026,14 @@ extern "C" inline void DeleteThreadLocalValue(void* value_holder) {
 }
 
 // Implements thread-local storage on pthreads-based systems.
-//
-//   // Thread 1
-//   ThreadLocal<int> tl(100);  // 100 is the default value for each thread.
-//
-//   // Thread 2
-//   tl.set(150);  // Changes the value for thread 2 only.
-//   EXPECT_EQ(150, tl.get());
-//
-//   // Thread 1
-//   EXPECT_EQ(100, tl.get());  // In thread 1, tl has the original value.
-//   tl.set(200);
-//   EXPECT_EQ(200, tl.get());
-//
-// The template type argument T must have a public copy constructor.
-// In addition, the default ThreadLocal constructor requires T to have
-// a public default constructor.
-//
-// An object managed for a thread by a ThreadLocal instance is deleted
-// when the thread exits.  Or, if the ThreadLocal instance dies in
-// that thread, when the ThreadLocal dies.  It's the user's
-// responsibility to ensure that all other threads using a ThreadLocal
-// have exited when it dies, or the per-thread objects for those
-// threads will not be deleted.
-//
-// Google Test only uses global ThreadLocal objects.  That means they
-// will die after main() has returned.  Therefore, no per-thread
-// object managed by Google Test will be leaked as long as all threads
-// using Google Test have exited when main() returns.
 template <typename T>
 class ThreadLocal {
  public:
-  ThreadLocal() : key_(CreateKey()),
-                  default_() {}
-  explicit ThreadLocal(const T& value) : key_(CreateKey()),
-                                         default_(value) {}
+  ThreadLocal()
+      : key_(CreateKey()), default_factory_(new DefaultValueHolderFactory()) {}
+  explicit ThreadLocal(const T& value)
+      : key_(CreateKey()),
+        default_factory_(new InstanceValueHolderFactory(value)) {}
 
   ~ThreadLocal() {
     // Destroys the managed object for the current thread, if any.
@@ -1495,6 +2053,7 @@ class ThreadLocal {
   // Holds a value of type T.
   class ValueHolder : public ThreadLocalValueHolderBase {
    public:
+    ValueHolder() : value_() {}
     explicit ValueHolder(const T& value) : value_(value) {}
 
     T* pointer() { return &value_; }
@@ -1520,22 +2079,54 @@ class ThreadLocal {
       return CheckedDowncastToActualType<ValueHolder>(holder)->pointer();
     }
 
-    ValueHolder* const new_holder = new ValueHolder(default_);
+    ValueHolder* const new_holder = default_factory_->MakeNewHolder();
     ThreadLocalValueHolderBase* const holder_base = new_holder;
     GTEST_CHECK_POSIX_SUCCESS_(pthread_setspecific(key_, holder_base));
     return new_holder->pointer();
   }
 
+  class ValueHolderFactory {
+   public:
+    ValueHolderFactory() {}
+    virtual ~ValueHolderFactory() {}
+    virtual ValueHolder* MakeNewHolder() const = 0;
+
+   private:
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
+  };
+
+  class DefaultValueHolderFactory : public ValueHolderFactory {
+   public:
+    DefaultValueHolderFactory() {}
+    virtual ValueHolder* MakeNewHolder() const { return new ValueHolder(); }
+
+   private:
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
+  };
+
+  class InstanceValueHolderFactory : public ValueHolderFactory {
+   public:
+    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
+    virtual ValueHolder* MakeNewHolder() const {
+      return new ValueHolder(value_);
+    }
+
+   private:
+    const T value_;  // The value for each thread.
+
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
+  };
+
   // A key pthreads uses for looking up per-thread values.
   const pthread_key_t key_;
-  const T default_;  // The default value for each thread.
+  scoped_ptr<ValueHolderFactory> default_factory_;
 
   GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
 };
 
-# define GTEST_IS_THREADSAFE 1
+# endif  // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
 
-#else  // GTEST_HAS_PTHREAD
+#else  // GTEST_IS_THREADSAFE
 
 // A dummy implementation of synchronization primitives (mutex, lock,
 // and thread-local variable).  Necessary for compiling Google Test where
@@ -1555,6 +2146,11 @@ class Mutex {
 
 # define GTEST_DEFINE_STATIC_MUTEX_(mutex) ::testing::internal::Mutex mutex
 
+// We cannot name this class MutexLock because the ctor declaration would
+// conflict with a macro named MutexLock, which is defined on some
+// platforms. That macro is used as a defensive measure to prevent against
+// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
+// "MutexLock l(&mu)".  Hence the typedef trick below.
 class GTestMutexLock {
  public:
   explicit GTestMutexLock(Mutex*) {}  // NOLINT
@@ -1575,11 +2171,7 @@ class ThreadLocal {
   T value_;
 };
 
-// The above synchronization primitives have dummy implementations.
-// Therefore Google Test is not thread-safe.
-# define GTEST_IS_THREADSAFE 0
-
-#endif  // GTEST_HAS_PTHREAD
+#endif  // GTEST_IS_THREADSAFE
 
 // Returns the number of threads running in the process, or 0 to indicate that
 // we cannot detect it.
@@ -1689,6 +2281,13 @@ inline char ToUpper(char ch) {
   return static_cast<char>(toupper(static_cast<unsigned char>(ch)));
 }
 
+inline std::string StripTrailingSpaces(std::string str) {
+  std::string::iterator it = str.end();
+  while (it != str.begin() && IsSpace(*--it))
+    it = str.erase(it);
+  return str;
+}
+
 // The testing::internal::posix namespace holds wrappers for common
 // POSIX functions.  These wrappers hide the differences between
 // Windows/MSVC and POSIX systems.  Since some compilers define these
@@ -1752,11 +2351,7 @@ inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
 
 // Functions deprecated by MSVC 8.0.
 
-#ifdef _MSC_VER
-// Temporarily disable warning 4996 (deprecated function).
-# pragma warning(push)
-# pragma warning(disable:4996)
-#endif
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996 /* deprecated function */)
 
 inline const char* StrNCpy(char* dest, const char* src, size_t n) {
   return strncpy(dest, src, n);
@@ -1766,7 +2361,7 @@ inline const char* StrNCpy(char* dest, const char* src, size_t n) {
 // StrError() aren't needed on Windows CE at this time and thus not
 // defined there.
 
-#if !GTEST_OS_WINDOWS_MOBILE
+#if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
 inline int ChDir(const char* dir) { return chdir(dir); }
 #endif
 inline FILE* FOpen(const char* path, const char* mode) {
@@ -1790,8 +2385,9 @@ inline int Close(int fd) { return close(fd); }
 inline const char* StrError(int errnum) { return strerror(errnum); }
 #endif
 inline const char* GetEnv(const char* name) {
-#if GTEST_OS_WINDOWS_MOBILE
+#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE | GTEST_OS_WINDOWS_RT
   // We are on Windows CE, which has no environment variables.
+  static_cast<void>(name);  // To prevent 'unused argument' warning.
   return NULL;
 #elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
   // Environment variables which we programmatically clear will be set to the
@@ -1803,9 +2399,7 @@ inline const char* GetEnv(const char* name) {
 #endif
 }
 
-#ifdef _MSC_VER
-# pragma warning(pop)  // Restores the warning state.
-#endif
+GTEST_DISABLE_MSC_WARNINGS_POP_()
 
 #if GTEST_OS_WINDOWS_MOBILE
 // Windows CE has no C library. The abort() function is used in
@@ -1906,11 +2500,20 @@ typedef TypeWithSize<8>::Int TimeInMillis;  // Represents time in milliseconds.
 // Utilities for command line flags and environment variables.
 
 // Macro for referencing flags.
-#define GTEST_FLAG(name) FLAGS_gtest_##name
+#if !defined(GTEST_FLAG)
+# define GTEST_FLAG(name) FLAGS_gtest_##name
+#endif  // !defined(GTEST_FLAG)
+
+#if !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
+# define GTEST_USE_OWN_FLAGFILE_FLAG_ 1
+#endif  // !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
+
+#if !defined(GTEST_DECLARE_bool_)
+# define GTEST_FLAG_SAVER_ ::testing::internal::GTestFlagSaver
 
 // Macros for declaring flags.
-#define GTEST_DECLARE_bool_(name) GTEST_API_ extern bool GTEST_FLAG(name)
-#define GTEST_DECLARE_int32_(name) \
+# define GTEST_DECLARE_bool_(name) GTEST_API_ extern bool GTEST_FLAG(name)
+# define GTEST_DECLARE_int32_(name) \
     GTEST_API_ extern ::testing::internal::Int32 GTEST_FLAG(name)
 #define GTEST_DECLARE_string_(name) \
     GTEST_API_ extern ::std::string GTEST_FLAG(name)
@@ -1923,9 +2526,13 @@ typedef TypeWithSize<8>::Int TimeInMillis;  // Represents time in milliseconds.
 #define GTEST_DEFINE_string_(name, default_val, doc) \
     GTEST_API_ ::std::string GTEST_FLAG(name) = (default_val)
 
+#endif  // !defined(GTEST_DECLARE_bool_)
+
 // Thread annotations
-#define GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)
-#define GTEST_LOCK_EXCLUDED_(locks)
+#if !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
+# define GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)
+# define GTEST_LOCK_EXCLUDED_(locks)
+#endif  // !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
 
 // Parses 'str' for a 32-bit signed integer.  If successful, writes the result
 // to *value and returns true; otherwise leaves *value unchanged and returns
@@ -1939,7 +2546,7 @@ bool ParseInt32(const Message& src_text, const char* str, Int32* value);
 // corresponding to the given Google Test flag.
 bool BoolFromGTestEnv(const char* flag, bool default_val);
 GTEST_API_ Int32 Int32FromGTestEnv(const char* flag, Int32 default_val);
-const char* StringFromGTestEnv(const char* flag, const char* default_val);
+std::string StringFromGTestEnv(const char* flag, const char* default_val);
 
 }  // namespace internal
 }  // namespace testing
diff --git a/src/gtest/include/gtest/internal/gtest-tuple.h b/src/gtest/include/gtest/internal/gtest-tuple.h
index 7b3dfc312dc..e9b405340a8 100644
--- a/src/gtest/include/gtest/internal/gtest-tuple.h
+++ b/src/gtest/include/gtest/internal/gtest-tuple.h
@@ -53,6 +53,14 @@
    private:
 #endif
 
+// Visual Studio 2010, 2012, and 2013 define symbols in std::tr1 that conflict
+// with our own definitions. Therefore using our own tuple does not work on
+// those compilers.
+#if defined(_MSC_VER) && _MSC_VER >= 1600  /* 1600 is Visual Studio 2010 */
+# error "gtest's tuple doesn't compile on Visual Studio 2010 or later. \
+GTEST_USE_OWN_TR1_TUPLE must be set to 0 on those compilers."
+#endif
+
 // GTEST_n_TUPLE_(T) is the type of an n-tuple.
 #define GTEST_0_TUPLE_(T) tuple<>
 #define GTEST_1_TUPLE_(T) tuple<T##0, void, void, void, void, void, void, \
diff --git a/src/gtest/include/gtest/internal/gtest-tuple.h.pump b/src/gtest/include/gtest/internal/gtest-tuple.h.pump
index c7d9e039b1f..429ddfeecaa 100644
--- a/src/gtest/include/gtest/internal/gtest-tuple.h.pump
+++ b/src/gtest/include/gtest/internal/gtest-tuple.h.pump
@@ -52,6 +52,14 @@ $$ This meta comment fixes auto-indentation in Emacs. }}
    private:
 #endif
 
+// Visual Studio 2010, 2012, and 2013 define symbols in std::tr1 that conflict
+// with our own definitions. Therefore using our own tuple does not work on
+// those compilers.
+#if defined(_MSC_VER) && _MSC_VER >= 1600  /* 1600 is Visual Studio 2010 */
+# error "gtest's tuple doesn't compile on Visual Studio 2010 or later. \
+GTEST_USE_OWN_TR1_TUPLE must be set to 0 on those compilers."
+#endif
+
 
 $range i 0..n-1
 $range j 0..n
diff --git a/src/gtest/src/gtest-death-test.cc b/src/gtest/src/gtest-death-test.cc
index a6023fce4fa..a01a3698308 100644
--- a/src/gtest/src/gtest-death-test.cc
+++ b/src/gtest/src/gtest-death-test.cc
@@ -33,6 +33,7 @@
 
 #include "gtest/gtest-death-test.h"
 #include "gtest/internal/gtest-port.h"
+#include "gtest/internal/custom/gtest.h"
 
 #if GTEST_HAS_DEATH_TEST
 
@@ -68,9 +69,9 @@
 
 // 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.
+// included, or there will be a compiler error.  This trick exists to
+// prevent the accidental inclusion of gtest-internal-inl.h in the
+// user's code.
 #define GTEST_IMPLEMENTATION_ 1
 #include "src/gtest-internal-inl.h"
 #undef GTEST_IMPLEMENTATION_
@@ -120,7 +121,9 @@ namespace internal {
 
 // Valid only for fast death tests. Indicates the code is running in the
 // child process of a fast style death test.
+# if !GTEST_OS_WINDOWS
 static bool g_in_fast_death_test_child = false;
+# endif
 
 // Returns a Boolean value indicating whether the caller is currently
 // executing in the context of the death test child process.  Tools such as
@@ -169,6 +172,14 @@ KilledBySignal::KilledBySignal(int signum) : signum_(signum) {
 
 // KilledBySignal function-call operator.
 bool KilledBySignal::operator()(int exit_status) const {
+#  if defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
+  {
+    bool result;
+    if (GTEST_KILLED_BY_SIGNAL_OVERRIDE_(signum_, exit_status, &result)) {
+      return result;
+    }
+  }
+#  endif  // defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
   return WIFSIGNALED(exit_status) && WTERMSIG(exit_status) == signum_;
 }
 # endif  // !GTEST_OS_WINDOWS
@@ -875,6 +886,11 @@ class ExecDeathTest : public ForkingDeathTest {
   static ::std::vector<testing::internal::string>
   GetArgvsForDeathTestChildProcess() {
     ::std::vector<testing::internal::string> args = GetInjectableArgvs();
+#  if defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
+    ::std::vector<testing::internal::string> extra_args =
+        GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_();
+    args.insert(args.end(), extra_args.begin(), extra_args.end());
+#  endif  // defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
     return args;
   }
   // The name of the file in which the death test is located.
@@ -985,6 +1001,8 @@ void StackLowerThanAddress(const void* ptr, bool* result) {
   *result = (&dummy < ptr);
 }
 
+// Make sure AddressSanitizer does not tamper with the stack here.
+GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
 bool StackGrowsDown() {
   int dummy;
   bool result;
@@ -1202,26 +1220,6 @@ bool DefaultDeathTestFactory::Create(const char* statement, const RE* regex,
   return true;
 }
 
-// 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.
-static void SplitString(const ::std::string& str, char delimiter,
-                        ::std::vector< ::std::string>* dest) {
-  ::std::vector< ::std::string> parsed;
-  ::std::string::size_type pos = 0;
-  while (::testing::internal::AlwaysTrue()) {
-    const ::std::string::size_type colon = str.find(delimiter, pos);
-    if (colon == ::std::string::npos) {
-      parsed.push_back(str.substr(pos));
-      break;
-    } else {
-      parsed.push_back(str.substr(pos, colon - pos));
-      pos = colon + 1;
-    }
-  }
-  dest->swap(parsed);
-}
-
 # 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
diff --git a/src/gtest/src/gtest-filepath.cc b/src/gtest/src/gtest-filepath.cc
index 7e0d663faf0..0292dc11957 100644
--- a/src/gtest/src/gtest-filepath.cc
+++ b/src/gtest/src/gtest-filepath.cc
@@ -70,7 +70,6 @@ namespace internal {
 // of them.
 const char kPathSeparator = '\\';
 const char kAlternatePathSeparator = '/';
-const char kPathSeparatorString[] = "\\";
 const char kAlternatePathSeparatorString[] = "/";
 # if GTEST_OS_WINDOWS_MOBILE
 // Windows CE doesn't have a current directory. You should not use
@@ -84,7 +83,6 @@ const char kCurrentDirectoryString[] = ".\\";
 # endif  // GTEST_OS_WINDOWS_MOBILE
 #else
 const char kPathSeparator = '/';
-const char kPathSeparatorString[] = "/";
 const char kCurrentDirectoryString[] = "./";
 #endif  // GTEST_OS_WINDOWS
 
@@ -99,7 +97,7 @@ static bool IsPathSeparator(char c) {
 
 // Returns the current working directory, or "" if unsuccessful.
 FilePath FilePath::GetCurrentDir() {
-#if GTEST_OS_WINDOWS_MOBILE
+#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT
   // Windows CE doesn't have a current directory, so we just return
   // something reasonable.
   return FilePath(kCurrentDirectoryString);
@@ -108,7 +106,14 @@ FilePath FilePath::GetCurrentDir() {
   return FilePath(_getcwd(cwd, sizeof(cwd)) == NULL ? "" : cwd);
 #else
   char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
-  return FilePath(getcwd(cwd, sizeof(cwd)) == NULL ? "" : cwd);
+  char* result = getcwd(cwd, sizeof(cwd));
+# if GTEST_OS_NACL
+  // getcwd will likely fail in NaCl due to the sandbox, so return something
+  // reasonable. The user may have provided a shim implementation for getcwd,
+  // however, so fallback only when failure is detected.
+  return FilePath(result == NULL ? kCurrentDirectoryString : cwd);
+# endif  // GTEST_OS_NACL
+  return FilePath(result == NULL ? "" : cwd);
 #endif  // GTEST_OS_WINDOWS_MOBILE
 }
 
@@ -125,7 +130,7 @@ FilePath FilePath::RemoveExtension(const char* extension) const {
   return *this;
 }
 
-// Returns a pointer to the last occurrence of a valid path separator in
+// Returns a pointer to the last occurence of a valid path separator in
 // the FilePath. On Windows, for example, both '/' and '\' are valid path
 // separators. Returns NULL if no path separator was found.
 const char* FilePath::FindLastPathSeparator() const {
diff --git a/src/gtest/src/gtest-internal-inl.h b/src/gtest/src/gtest-internal-inl.h
index 35df303cca6..ed8a682a964 100644
--- a/src/gtest/src/gtest-internal-inl.h
+++ b/src/gtest/src/gtest-internal-inl.h
@@ -40,7 +40,7 @@
 // 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.
+// If this file is included from the user's 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_
@@ -100,6 +100,7 @@ const char kShuffleFlag[] = "shuffle";
 const char kStackTraceDepthFlag[] = "stack_trace_depth";
 const char kStreamResultToFlag[] = "stream_result_to";
 const char kThrowOnFailureFlag[] = "throw_on_failure";
+const char kFlagfileFlag[] = "flagfile";
 
 // A valid random seed must be in [1, kMaxRandomSeed].
 const int kMaxRandomSeed = 99999;
@@ -432,6 +433,10 @@ class OsStackTraceGetterInterface {
   // CurrentStackTrace() will use to find and hide Google Test stack frames.
   virtual void UponLeavingGTest() = 0;
 
+  // This string is inserted in place of stack frames that are part of
+  // Google Test's implementation.
+  static const char* const kElidedFramesMarker;
+
  private:
   GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetterInterface);
 };
@@ -439,26 +444,12 @@ class OsStackTraceGetterInterface {
 // A working implementation of the OsStackTraceGetterInterface interface.
 class OsStackTraceGetter : public OsStackTraceGetterInterface {
  public:
-  OsStackTraceGetter() : caller_frame_(NULL) {}
-
-  virtual string CurrentStackTrace(int max_depth, int skip_count)
-      GTEST_LOCK_EXCLUDED_(mutex_);
+  OsStackTraceGetter() {}
 
-  virtual void UponLeavingGTest() GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // This string is inserted in place of stack frames that are part of
-  // Google Test's implementation.
-  static const char* const kElidedFramesMarker;
+  virtual string CurrentStackTrace(int max_depth, int skip_count);
+  virtual void UponLeavingGTest();
 
  private:
-  Mutex mutex_;  // protects all internal state
-
-  // We save the stack frame below the frame that calls user code.
-  // We do this because the address of the frame immediately below
-  // the user code changes between the call to UponLeavingGTest()
-  // and any calls to CurrentStackTrace() from within the user code.
-  void* caller_frame_;
-
   GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetter);
 };
 
@@ -968,32 +959,6 @@ GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv);
 // platform.
 GTEST_API_ std::string GetLastErrnoDescription();
 
-# 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
@@ -1067,7 +1032,7 @@ class TestResultAccessor {
 #if GTEST_CAN_STREAM_RESULTS_
 
 // Streams test results to the given port on the given host machine.
-class StreamingListener : public EmptyTestEventListener {
+class GTEST_API_ StreamingListener : public EmptyTestEventListener {
  public:
   // Abstract base class for writing strings to a socket.
   class AbstractSocketWriter {
diff --git a/src/gtest/src/gtest-port.cc b/src/gtest/src/gtest-port.cc
index 0c4df5f29a7..e5bf3dd2be4 100644
--- a/src/gtest/src/gtest-port.cc
+++ b/src/gtest/src/gtest-port.cc
@@ -35,15 +35,16 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <fstream>
 
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>  // For TerminateProcess()
-#elif GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS
+# include <windows.h>
 # include <io.h>
 # include <sys/stat.h>
+# include <map>  // Used in ThreadLocal.
 #else
 # include <unistd.h>
-#endif  // GTEST_OS_WINDOWS_MOBILE
+#endif  // GTEST_OS_WINDOWS
 
 #if GTEST_OS_MAC
 # include <mach/mach_init.h>
@@ -53,9 +54,15 @@
 
 #if GTEST_OS_QNX
 # include <devctl.h>
+# include <fcntl.h>
 # include <sys/procfs.h>
 #endif  // GTEST_OS_QNX
 
+#if GTEST_OS_AIX
+# include <procinfo.h>
+# include <sys/types.h>
+#endif  // GTEST_OS_AIX
+
 #include "gtest/gtest-spi.h"
 #include "gtest/gtest-message.h"
 #include "gtest/internal/gtest-internal.h"
@@ -63,9 +70,9 @@
 
 // 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.
+// included, or there will be a compiler error.  This trick exists to
+// prevent the accidental inclusion of gtest-internal-inl.h in the
+// user's code.
 #define GTEST_IMPLEMENTATION_ 1
 #include "src/gtest-internal-inl.h"
 #undef GTEST_IMPLEMENTATION_
@@ -82,10 +89,31 @@ const int kStdOutFileno = STDOUT_FILENO;
 const int kStdErrFileno = STDERR_FILENO;
 #endif  // _MSC_VER
 
-#if GTEST_OS_MAC
+#if GTEST_OS_LINUX
+
+namespace {
+template <typename T>
+T ReadProcFileField(const string& filename, int field) {
+  std::string dummy;
+  std::ifstream file(filename.c_str());
+  while (field-- > 0) {
+    file >> dummy;
+  }
+  T output = 0;
+  file >> output;
+  return output;
+}
+}  // namespace
+
+// Returns the number of active threads, or 0 when there is an error.
+size_t GetThreadCount() {
+  const string filename =
+      (Message() << "/proc/" << getpid() << "/stat").GetString();
+  return ReadProcFileField<int>(filename, 19);
+}
+
+#elif GTEST_OS_MAC
 
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
 size_t GetThreadCount() {
   const task_t task = mach_task_self();
   mach_msg_type_number_t thread_count;
@@ -123,6 +151,19 @@ size_t GetThreadCount() {
   }
 }
 
+#elif GTEST_OS_AIX
+
+size_t GetThreadCount() {
+  struct procentry64 entry;
+  pid_t pid = getpid();
+  int status = getprocs64(&entry, sizeof(entry), NULL, 0, &pid, 1);
+  if (status == 1) {
+    return entry.pi_thcount;
+  } else {
+    return 0;
+  }
+}
+
 #else
 
 size_t GetThreadCount() {
@@ -131,7 +172,390 @@ size_t GetThreadCount() {
   return 0;
 }
 
-#endif  // GTEST_OS_MAC
+#endif  // GTEST_OS_LINUX
+
+#if GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
+
+void SleepMilliseconds(int n) {
+  ::Sleep(n);
+}
+
+AutoHandle::AutoHandle()
+    : handle_(INVALID_HANDLE_VALUE) {}
+
+AutoHandle::AutoHandle(Handle handle)
+    : handle_(handle) {}
+
+AutoHandle::~AutoHandle() {
+  Reset();
+}
+
+AutoHandle::Handle AutoHandle::Get() const {
+  return handle_;
+}
+
+void AutoHandle::Reset() {
+  Reset(INVALID_HANDLE_VALUE);
+}
+
+void AutoHandle::Reset(HANDLE handle) {
+  // Resetting with the same handle we already own is invalid.
+  if (handle_ != handle) {
+    if (IsCloseable()) {
+      ::CloseHandle(handle_);
+    }
+    handle_ = handle;
+  } else {
+    GTEST_CHECK_(!IsCloseable())
+        << "Resetting a valid handle to itself is likely a programmer error "
+            "and thus not allowed.";
+  }
+}
+
+bool AutoHandle::IsCloseable() const {
+  // Different Windows APIs may use either of these values to represent an
+  // invalid handle.
+  return handle_ != NULL && handle_ != INVALID_HANDLE_VALUE;
+}
+
+Notification::Notification()
+    : event_(::CreateEvent(NULL,   // Default security attributes.
+                           TRUE,   // Do not reset automatically.
+                           FALSE,  // Initially unset.
+                           NULL)) {  // Anonymous event.
+  GTEST_CHECK_(event_.Get() != NULL);
+}
+
+void Notification::Notify() {
+  GTEST_CHECK_(::SetEvent(event_.Get()) != FALSE);
+}
+
+void Notification::WaitForNotification() {
+  GTEST_CHECK_(
+      ::WaitForSingleObject(event_.Get(), INFINITE) == WAIT_OBJECT_0);
+}
+
+Mutex::Mutex()
+    : owner_thread_id_(0),
+      type_(kDynamic),
+      critical_section_init_phase_(0),
+      critical_section_(new CRITICAL_SECTION) {
+  ::InitializeCriticalSection(critical_section_);
+}
+
+Mutex::~Mutex() {
+  // Static mutexes are leaked intentionally. It is not thread-safe to try
+  // to clean them up.
+  // TODO(yukawa): Switch to Slim Reader/Writer (SRW) Locks, which requires
+  // nothing to clean it up but is available only on Vista and later.
+  // http://msdn.microsoft.com/en-us/library/windows/desktop/aa904937.aspx
+  if (type_ == kDynamic) {
+    ::DeleteCriticalSection(critical_section_);
+    delete critical_section_;
+    critical_section_ = NULL;
+  }
+}
+
+void Mutex::Lock() {
+  ThreadSafeLazyInit();
+  ::EnterCriticalSection(critical_section_);
+  owner_thread_id_ = ::GetCurrentThreadId();
+}
+
+void Mutex::Unlock() {
+  ThreadSafeLazyInit();
+  // We don't protect writing to owner_thread_id_ here, as it's the
+  // caller's responsibility to ensure that the current thread holds the
+  // mutex when this is called.
+  owner_thread_id_ = 0;
+  ::LeaveCriticalSection(critical_section_);
+}
+
+// Does nothing if the current thread holds the mutex. Otherwise, crashes
+// with high probability.
+void Mutex::AssertHeld() {
+  ThreadSafeLazyInit();
+  GTEST_CHECK_(owner_thread_id_ == ::GetCurrentThreadId())
+      << "The current thread is not holding the mutex @" << this;
+}
+
+// Initializes owner_thread_id_ and critical_section_ in static mutexes.
+void Mutex::ThreadSafeLazyInit() {
+  // Dynamic mutexes are initialized in the constructor.
+  if (type_ == kStatic) {
+    switch (
+        ::InterlockedCompareExchange(&critical_section_init_phase_, 1L, 0L)) {
+      case 0:
+        // If critical_section_init_phase_ was 0 before the exchange, we
+        // are the first to test it and need to perform the initialization.
+        owner_thread_id_ = 0;
+        critical_section_ = new CRITICAL_SECTION;
+        ::InitializeCriticalSection(critical_section_);
+        // Updates the critical_section_init_phase_ to 2 to signal
+        // initialization complete.
+        GTEST_CHECK_(::InterlockedCompareExchange(
+                          &critical_section_init_phase_, 2L, 1L) ==
+                      1L);
+        break;
+      case 1:
+        // Somebody else is already initializing the mutex; spin until they
+        // are done.
+        while (::InterlockedCompareExchange(&critical_section_init_phase_,
+                                            2L,
+                                            2L) != 2L) {
+          // Possibly yields the rest of the thread's time slice to other
+          // threads.
+          ::Sleep(0);
+        }
+        break;
+
+      case 2:
+        break;  // The mutex is already initialized and ready for use.
+
+      default:
+        GTEST_CHECK_(false)
+            << "Unexpected value of critical_section_init_phase_ "
+            << "while initializing a static mutex.";
+    }
+  }
+}
+
+namespace {
+
+class ThreadWithParamSupport : public ThreadWithParamBase {
+ public:
+  static HANDLE CreateThread(Runnable* runnable,
+                             Notification* thread_can_start) {
+    ThreadMainParam* param = new ThreadMainParam(runnable, thread_can_start);
+    DWORD thread_id;
+    // TODO(yukawa): Consider to use _beginthreadex instead.
+    HANDLE thread_handle = ::CreateThread(
+        NULL,    // Default security.
+        0,       // Default stack size.
+        &ThreadWithParamSupport::ThreadMain,
+        param,   // Parameter to ThreadMainStatic
+        0x0,     // Default creation flags.
+        &thread_id);  // Need a valid pointer for the call to work under Win98.
+    GTEST_CHECK_(thread_handle != NULL) << "CreateThread failed with error "
+                                        << ::GetLastError() << ".";
+    if (thread_handle == NULL) {
+      delete param;
+    }
+    return thread_handle;
+  }
+
+ private:
+  struct ThreadMainParam {
+    ThreadMainParam(Runnable* runnable, Notification* thread_can_start)
+        : runnable_(runnable),
+          thread_can_start_(thread_can_start) {
+    }
+    scoped_ptr<Runnable> runnable_;
+    // Does not own.
+    Notification* thread_can_start_;
+  };
+
+  static DWORD WINAPI ThreadMain(void* ptr) {
+    // Transfers ownership.
+    scoped_ptr<ThreadMainParam> param(static_cast<ThreadMainParam*>(ptr));
+    if (param->thread_can_start_ != NULL)
+      param->thread_can_start_->WaitForNotification();
+    param->runnable_->Run();
+    return 0;
+  }
+
+  // Prohibit instantiation.
+  ThreadWithParamSupport();
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParamSupport);
+};
+
+}  // namespace
+
+ThreadWithParamBase::ThreadWithParamBase(Runnable *runnable,
+                                         Notification* thread_can_start)
+      : thread_(ThreadWithParamSupport::CreateThread(runnable,
+                                                     thread_can_start)) {
+}
+
+ThreadWithParamBase::~ThreadWithParamBase() {
+  Join();
+}
+
+void ThreadWithParamBase::Join() {
+  GTEST_CHECK_(::WaitForSingleObject(thread_.Get(), INFINITE) == WAIT_OBJECT_0)
+      << "Failed to join the thread with error " << ::GetLastError() << ".";
+}
+
+// Maps a thread to a set of ThreadIdToThreadLocals that have values
+// instantiated on that thread and notifies them when the thread exits.  A
+// ThreadLocal instance is expected to persist until all threads it has
+// values on have terminated.
+class ThreadLocalRegistryImpl {
+ public:
+  // Registers thread_local_instance as having value on the current thread.
+  // Returns a value that can be used to identify the thread from other threads.
+  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
+      const ThreadLocalBase* thread_local_instance) {
+    DWORD current_thread = ::GetCurrentThreadId();
+    MutexLock lock(&mutex_);
+    ThreadIdToThreadLocals* const thread_to_thread_locals =
+        GetThreadLocalsMapLocked();
+    ThreadIdToThreadLocals::iterator thread_local_pos =
+        thread_to_thread_locals->find(current_thread);
+    if (thread_local_pos == thread_to_thread_locals->end()) {
+      thread_local_pos = thread_to_thread_locals->insert(
+          std::make_pair(current_thread, ThreadLocalValues())).first;
+      StartWatcherThreadFor(current_thread);
+    }
+    ThreadLocalValues& thread_local_values = thread_local_pos->second;
+    ThreadLocalValues::iterator value_pos =
+        thread_local_values.find(thread_local_instance);
+    if (value_pos == thread_local_values.end()) {
+      value_pos =
+          thread_local_values
+              .insert(std::make_pair(
+                  thread_local_instance,
+                  linked_ptr<ThreadLocalValueHolderBase>(
+                      thread_local_instance->NewValueForCurrentThread())))
+              .first;
+    }
+    return value_pos->second.get();
+  }
+
+  static void OnThreadLocalDestroyed(
+      const ThreadLocalBase* thread_local_instance) {
+    std::vector<linked_ptr<ThreadLocalValueHolderBase> > value_holders;
+    // Clean up the ThreadLocalValues data structure while holding the lock, but
+    // defer the destruction of the ThreadLocalValueHolderBases.
+    {
+      MutexLock lock(&mutex_);
+      ThreadIdToThreadLocals* const thread_to_thread_locals =
+          GetThreadLocalsMapLocked();
+      for (ThreadIdToThreadLocals::iterator it =
+          thread_to_thread_locals->begin();
+          it != thread_to_thread_locals->end();
+          ++it) {
+        ThreadLocalValues& thread_local_values = it->second;
+        ThreadLocalValues::iterator value_pos =
+            thread_local_values.find(thread_local_instance);
+        if (value_pos != thread_local_values.end()) {
+          value_holders.push_back(value_pos->second);
+          thread_local_values.erase(value_pos);
+          // This 'if' can only be successful at most once, so theoretically we
+          // could break out of the loop here, but we don't bother doing so.
+        }
+      }
+    }
+    // Outside the lock, let the destructor for 'value_holders' deallocate the
+    // ThreadLocalValueHolderBases.
+  }
+
+  static void OnThreadExit(DWORD thread_id) {
+    GTEST_CHECK_(thread_id != 0) << ::GetLastError();
+    std::vector<linked_ptr<ThreadLocalValueHolderBase> > value_holders;
+    // Clean up the ThreadIdToThreadLocals data structure while holding the
+    // lock, but defer the destruction of the ThreadLocalValueHolderBases.
+    {
+      MutexLock lock(&mutex_);
+      ThreadIdToThreadLocals* const thread_to_thread_locals =
+          GetThreadLocalsMapLocked();
+      ThreadIdToThreadLocals::iterator thread_local_pos =
+          thread_to_thread_locals->find(thread_id);
+      if (thread_local_pos != thread_to_thread_locals->end()) {
+        ThreadLocalValues& thread_local_values = thread_local_pos->second;
+        for (ThreadLocalValues::iterator value_pos =
+            thread_local_values.begin();
+            value_pos != thread_local_values.end();
+            ++value_pos) {
+          value_holders.push_back(value_pos->second);
+        }
+        thread_to_thread_locals->erase(thread_local_pos);
+      }
+    }
+    // Outside the lock, let the destructor for 'value_holders' deallocate the
+    // ThreadLocalValueHolderBases.
+  }
+
+ private:
+  // In a particular thread, maps a ThreadLocal object to its value.
+  typedef std::map<const ThreadLocalBase*,
+                   linked_ptr<ThreadLocalValueHolderBase> > ThreadLocalValues;
+  // Stores all ThreadIdToThreadLocals having values in a thread, indexed by
+  // thread's ID.
+  typedef std::map<DWORD, ThreadLocalValues> ThreadIdToThreadLocals;
+
+  // Holds the thread id and thread handle that we pass from
+  // StartWatcherThreadFor to WatcherThreadFunc.
+  typedef std::pair<DWORD, HANDLE> ThreadIdAndHandle;
+
+  static void StartWatcherThreadFor(DWORD thread_id) {
+    // The returned handle will be kept in thread_map and closed by
+    // watcher_thread in WatcherThreadFunc.
+    HANDLE thread = ::OpenThread(SYNCHRONIZE | THREAD_QUERY_INFORMATION,
+                                 FALSE,
+                                 thread_id);
+    GTEST_CHECK_(thread != NULL);
+    // We need to to pass a valid thread ID pointer into CreateThread for it
+    // to work correctly under Win98.
+    DWORD watcher_thread_id;
+    HANDLE watcher_thread = ::CreateThread(
+        NULL,   // Default security.
+        0,      // Default stack size
+        &ThreadLocalRegistryImpl::WatcherThreadFunc,
+        reinterpret_cast<LPVOID>(new ThreadIdAndHandle(thread_id, thread)),
+        CREATE_SUSPENDED,
+        &watcher_thread_id);
+    GTEST_CHECK_(watcher_thread != NULL);
+    // Give the watcher thread the same priority as ours to avoid being
+    // blocked by it.
+    ::SetThreadPriority(watcher_thread,
+                        ::GetThreadPriority(::GetCurrentThread()));
+    ::ResumeThread(watcher_thread);
+    ::CloseHandle(watcher_thread);
+  }
+
+  // Monitors exit from a given thread and notifies those
+  // ThreadIdToThreadLocals about thread termination.
+  static DWORD WINAPI WatcherThreadFunc(LPVOID param) {
+    const ThreadIdAndHandle* tah =
+        reinterpret_cast<const ThreadIdAndHandle*>(param);
+    GTEST_CHECK_(
+        ::WaitForSingleObject(tah->second, INFINITE) == WAIT_OBJECT_0);
+    OnThreadExit(tah->first);
+    ::CloseHandle(tah->second);
+    delete tah;
+    return 0;
+  }
+
+  // Returns map of thread local instances.
+  static ThreadIdToThreadLocals* GetThreadLocalsMapLocked() {
+    mutex_.AssertHeld();
+    static ThreadIdToThreadLocals* map = new ThreadIdToThreadLocals;
+    return map;
+  }
+
+  // Protects access to GetThreadLocalsMapLocked() and its return value.
+  static Mutex mutex_;
+  // Protects access to GetThreadMapLocked() and its return value.
+  static Mutex thread_map_mutex_;
+};
+
+Mutex ThreadLocalRegistryImpl::mutex_(Mutex::kStaticMutex);
+Mutex ThreadLocalRegistryImpl::thread_map_mutex_(Mutex::kStaticMutex);
+
+ThreadLocalValueHolderBase* ThreadLocalRegistry::GetValueOnCurrentThread(
+      const ThreadLocalBase* thread_local_instance) {
+  return ThreadLocalRegistryImpl::GetValueOnCurrentThread(
+      thread_local_instance);
+}
+
+void ThreadLocalRegistry::OnThreadLocalDestroyed(
+      const ThreadLocalBase* thread_local_instance) {
+  ThreadLocalRegistryImpl::OnThreadLocalDestroyed(thread_local_instance);
+}
+
+#endif  // GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
 
 #if GTEST_USES_POSIX_RE
 
@@ -481,7 +905,6 @@ GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(
     return file_name + ":" + StreamableToString(line);
 }
 
-
 GTestLog::GTestLog(GTestLogSeverity severity, const char* file, int line)
     : severity_(severity) {
   const char* const marker =
@@ -502,10 +925,7 @@ GTestLog::~GTestLog() {
 }
 // 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
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996)
 
 #if GTEST_HAS_STREAM_REDIRECTION
 
@@ -581,12 +1001,6 @@ class CapturedStream {
   }
 
  private:
-  // Reads the entire content of a file as an std::string.
-  static std::string ReadEntireFile(FILE* file);
-
-  // Returns the size (in bytes) of a file.
-  static size_t GetFileSize(FILE* file);
-
   const int fd_;  // A stream to capture.
   int uncaptured_fd_;
   // Name of the temporary file holding the stderr output.
@@ -595,38 +1009,7 @@ class CapturedStream {
   GTEST_DISALLOW_COPY_AND_ASSIGN_(CapturedStream);
 };
 
-// Returns the size (in bytes) of a file.
-size_t CapturedStream::GetFileSize(FILE* file) {
-  fseek(file, 0, SEEK_END);
-  return static_cast<size_t>(ftell(file));
-}
-
-// Reads the entire content of a file as a string.
-std::string CapturedStream::ReadEntireFile(FILE* file) {
-  const size_t file_size = GetFileSize(file);
-  char* const buffer = new char[file_size];
-
-  size_t bytes_last_read = 0;  // # of bytes read in the last fread()
-  size_t bytes_read = 0;       // # of bytes read so far
-
-  fseek(file, 0, SEEK_SET);
-
-  // Keeps reading the file until we cannot read further or the
-  // pre-determined file size is reached.
-  do {
-    bytes_last_read = fread(buffer+bytes_read, 1, file_size-bytes_read, file);
-    bytes_read += bytes_last_read;
-  } while (bytes_last_read > 0 && bytes_read < file_size);
-
-  const std::string content(buffer, bytes_read);
-  delete[] buffer;
-
-  return content;
-}
-
-# ifdef _MSC_VER
-#  pragma warning(pop)
-# endif  // _MSC_VER
+GTEST_DISABLE_MSC_WARNINGS_POP_()
 
 static CapturedStream* g_captured_stderr = NULL;
 static CapturedStream* g_captured_stdout = NULL;
@@ -672,10 +1055,52 @@ std::string GetCapturedStderr() {
 
 #endif  // GTEST_HAS_STREAM_REDIRECTION
 
-#if GTEST_HAS_DEATH_TEST
+std::string TempDir() {
+#if GTEST_OS_WINDOWS_MOBILE
+  return "\\temp\\";
+#elif GTEST_OS_WINDOWS
+  const char* temp_dir = posix::GetEnv("TEMP");
+  if (temp_dir == NULL || temp_dir[0] == '\0')
+    return "\\temp\\";
+  else if (temp_dir[strlen(temp_dir) - 1] == '\\')
+    return temp_dir;
+  else
+    return std::string(temp_dir) + "\\";
+#elif GTEST_OS_LINUX_ANDROID
+  return "/sdcard/";
+#else
+  return "/tmp/";
+#endif  // GTEST_OS_WINDOWS_MOBILE
+}
+
+size_t GetFileSize(FILE* file) {
+  fseek(file, 0, SEEK_END);
+  return static_cast<size_t>(ftell(file));
+}
+
+std::string ReadEntireFile(FILE* file) {
+  const size_t file_size = GetFileSize(file);
+  char* const buffer = new char[file_size];
+
+  size_t bytes_last_read = 0;  // # of bytes read in the last fread()
+  size_t bytes_read = 0;       // # of bytes read so far
+
+  fseek(file, 0, SEEK_SET);
+
+  // Keeps reading the file until we cannot read further or the
+  // pre-determined file size is reached.
+  do {
+    bytes_last_read = fread(buffer+bytes_read, 1, file_size-bytes_read, file);
+    bytes_read += bytes_last_read;
+  } while (bytes_last_read > 0 && bytes_read < file_size);
+
+  const std::string content(buffer, bytes_read);
+  delete[] buffer;
+
+  return content;
+}
 
-// A copy of all command line arguments.  Set by InitGoogleTest().
-::std::vector<testing::internal::string> g_argvs;
+#if GTEST_HAS_DEATH_TEST
 
 static const ::std::vector<testing::internal::string>* g_injected_test_argvs =
                                         NULL;  // Owned.
@@ -690,7 +1115,7 @@ const ::std::vector<testing::internal::string>& GetInjectableArgvs() {
   if (g_injected_test_argvs != NULL) {
     return *g_injected_test_argvs;
   }
-  return g_argvs;
+  return GetArgvs();
 }
 #endif  // GTEST_HAS_DEATH_TEST
 
@@ -764,6 +1189,9 @@ bool ParseInt32(const Message& src_text, const char* str, Int32* value) {
 //
 // The value is considered true iff it's not "0".
 bool BoolFromGTestEnv(const char* flag, bool default_value) {
+#if defined(GTEST_GET_BOOL_FROM_ENV_)
+  return GTEST_GET_BOOL_FROM_ENV_(flag, default_value);
+#endif  // defined(GTEST_GET_BOOL_FROM_ENV_)
   const std::string env_var = FlagToEnvVar(flag);
   const char* const string_value = posix::GetEnv(env_var.c_str());
   return string_value == NULL ?
@@ -774,6 +1202,9 @@ bool BoolFromGTestEnv(const char* flag, bool default_value) {
 // variable corresponding to the given flag; if it isn't set or
 // doesn't represent a valid 32-bit integer, returns default_value.
 Int32 Int32FromGTestEnv(const char* flag, Int32 default_value) {
+#if defined(GTEST_GET_INT32_FROM_ENV_)
+  return GTEST_GET_INT32_FROM_ENV_(flag, default_value);
+#endif  // defined(GTEST_GET_INT32_FROM_ENV_)
   const std::string env_var = FlagToEnvVar(flag);
   const char* const string_value = posix::GetEnv(env_var.c_str());
   if (string_value == NULL) {
@@ -795,10 +1226,33 @@ Int32 Int32FromGTestEnv(const char* flag, Int32 default_value) {
 
 // Reads and returns the string environment variable corresponding to
 // the given flag; if it's not set, returns default_value.
-const char* StringFromGTestEnv(const char* flag, const char* default_value) {
+std::string StringFromGTestEnv(const char* flag, const char* default_value) {
+#if defined(GTEST_GET_STRING_FROM_ENV_)
+  return GTEST_GET_STRING_FROM_ENV_(flag, default_value);
+#endif  // defined(GTEST_GET_STRING_FROM_ENV_)
   const std::string env_var = FlagToEnvVar(flag);
-  const char* const value = posix::GetEnv(env_var.c_str());
-  return value == NULL ? default_value : value;
+  const char* value = posix::GetEnv(env_var.c_str());
+  if (value != NULL) {
+    return value;
+  }
+
+  // As a special case for the 'output' flag, if GTEST_OUTPUT is not
+  // set, we look for XML_OUTPUT_FILE, which is set by the Bazel build
+  // system.  The value of XML_OUTPUT_FILE is a filename without the
+  // "xml:" prefix of GTEST_OUTPUT.
+  //
+  // The net priority order after flag processing is thus:
+  //   --gtest_output command line flag
+  //   GTEST_OUTPUT environment variable
+  //   XML_OUTPUT_FILE environment variable
+  //   'default_value'
+  if (strcmp(flag, "output") == 0) {
+    value = posix::GetEnv("XML_OUTPUT_FILE");
+    if (value != NULL) {
+      return std::string("xml:") + value;
+    }
+  }
+  return default_value;
 }
 
 }  // namespace internal
diff --git a/src/gtest/src/gtest-printers.cc b/src/gtest/src/gtest-printers.cc
index 75fa4081009..a2df412f8a2 100644
--- a/src/gtest/src/gtest-printers.cc
+++ b/src/gtest/src/gtest-printers.cc
@@ -45,6 +45,7 @@
 #include "gtest/gtest-printers.h"
 #include <ctype.h>
 #include <stdio.h>
+#include <cwchar>
 #include <ostream>  // NOLINT
 #include <string>
 #include "gtest/internal/gtest-port.h"
@@ -56,6 +57,9 @@ namespace {
 using ::std::ostream;
 
 // Prints a segment of bytes in the given object.
+GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
 void PrintByteSegmentInObjectTo(const unsigned char* obj_bytes, size_t start,
                                 size_t count, ostream* os) {
   char text[5] = "";
@@ -252,6 +256,9 @@ void PrintTo(wchar_t wc, ostream* os) {
 // The array starts at begin, the length is len, it may include '\0' characters
 // and may not be NUL-terminated.
 template <typename CharType>
+GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
 static void PrintCharsAsStringTo(
     const CharType* begin, size_t len, ostream* os) {
   const char* const kQuoteBegin = sizeof(CharType) == 1 ? "\"" : "L\"";
@@ -273,6 +280,9 @@ static void PrintCharsAsStringTo(
 // Prints a (const) char/wchar_t array of 'len' elements, starting at address
 // 'begin'.  CharType must be either char or wchar_t.
 template <typename CharType>
+GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
 static void UniversalPrintCharArray(
     const CharType* begin, size_t len, ostream* os) {
   // The code
@@ -329,7 +339,7 @@ void PrintTo(const wchar_t* s, ostream* os) {
     *os << "NULL";
   } else {
     *os << ImplicitCast_<const void*>(s) << " pointing to ";
-    PrintCharsAsStringTo(s, wcslen(s), os);
+    PrintCharsAsStringTo(s, std::wcslen(s), os);
   }
 }
 #endif  // wchar_t is native
diff --git a/src/gtest/src/gtest-test-part.cc b/src/gtest/src/gtest-test-part.cc
index c60eef3ab35..fb0e35425e1 100644
--- a/src/gtest/src/gtest-test-part.cc
+++ b/src/gtest/src/gtest-test-part.cc
@@ -35,9 +35,9 @@
 
 // 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.
+// included, or there will be a compiler error.  This trick exists to
+// prevent the accidental inclusion of gtest-internal-inl.h in the
+// user's code.
 #define GTEST_IMPLEMENTATION_ 1
 #include "src/gtest-internal-inl.h"
 #undef GTEST_IMPLEMENTATION_
diff --git a/src/gtest/src/gtest-typed-test.cc b/src/gtest/src/gtest-typed-test.cc
index f0079f407c5..df1eef4754e 100644
--- a/src/gtest/src/gtest-typed-test.cc
+++ b/src/gtest/src/gtest-typed-test.cc
@@ -45,33 +45,41 @@ static const char* SkipSpaces(const char* str) {
   return str;
 }
 
+static std::vector<std::string> SplitIntoTestNames(const char* src) {
+  std::vector<std::string> name_vec;
+  src = SkipSpaces(src);
+  for (; src != NULL; src = SkipComma(src)) {
+    name_vec.push_back(StripTrailingSpaces(GetPrefixUntilComma(src)));
+  }
+  return name_vec;
+}
+
 // Verifies that registered_tests match the test names in
-// defined_test_names_; returns registered_tests if successful, or
+// registered_tests_; returns registered_tests if successful, or
 // aborts the program otherwise.
 const char* TypedTestCasePState::VerifyRegisteredTestNames(
     const char* file, int line, const char* registered_tests) {
-  typedef ::std::set<const char*>::const_iterator DefinedTestIter;
+  typedef RegisteredTestsMap::const_iterator RegisteredTestIter;
   registered_ = true;
 
-  // Skip initial whitespace in registered_tests since some
-  // preprocessors prefix stringizied literals with whitespace.
-  registered_tests = SkipSpaces(registered_tests);
+  std::vector<std::string> name_vec = SplitIntoTestNames(registered_tests);
 
   Message errors;
-  ::std::set<std::string> tests;
-  for (const char* names = registered_tests; names != NULL;
-       names = SkipComma(names)) {
-    const std::string name = GetPrefixUntilComma(names);
+
+  std::set<std::string> tests;
+  for (std::vector<std::string>::const_iterator name_it = name_vec.begin();
+       name_it != name_vec.end(); ++name_it) {
+    const std::string& name = *name_it;
     if (tests.count(name) != 0) {
       errors << "Test " << name << " is listed more than once.\n";
       continue;
     }
 
     bool found = false;
-    for (DefinedTestIter it = defined_test_names_.begin();
-         it != defined_test_names_.end();
+    for (RegisteredTestIter it = registered_tests_.begin();
+         it != registered_tests_.end();
          ++it) {
-      if (name == *it) {
+      if (name == it->first) {
         found = true;
         break;
       }
@@ -85,11 +93,11 @@ const char* TypedTestCasePState::VerifyRegisteredTestNames(
     }
   }
 
-  for (DefinedTestIter it = defined_test_names_.begin();
-       it != defined_test_names_.end();
+  for (RegisteredTestIter it = registered_tests_.begin();
+       it != registered_tests_.end();
        ++it) {
-    if (tests.count(*it) == 0) {
-      errors << "You forgot to list test " << *it << ".\n";
+    if (tests.count(it->first) == 0) {
+      errors << "You forgot to list test " << it->first << ".\n";
     }
   }
 
diff --git a/src/gtest/src/gtest.cc b/src/gtest/src/gtest.cc
index 0f4aa93e7b3..d882ab2e36a 100644
--- a/src/gtest/src/gtest.cc
+++ b/src/gtest/src/gtest.cc
@@ -32,6 +32,7 @@
 // The Google C++ Testing Framework (Google Test)
 
 #include "gtest/gtest.h"
+#include "gtest/internal/custom/gtest.h"
 #include "gtest/gtest-spi.h"
 
 #include <ctype.h>
@@ -46,6 +47,8 @@
 #include <algorithm>
 #include <iomanip>
 #include <limits>
+#include <list>
+#include <map>
 #include <ostream>  // NOLINT
 #include <sstream>
 #include <vector>
@@ -80,6 +83,7 @@
 #elif GTEST_OS_WINDOWS_MOBILE  // We are on Windows CE.
 
 # include <windows.h>  // NOLINT
+# undef min
 
 #elif GTEST_OS_WINDOWS  // We are on Windows proper.
 
@@ -102,6 +106,7 @@
 // cpplint thinks that the header is already included, so we want to
 // silence it.
 # include <windows.h>  // NOLINT
+# undef min
 
 #else
 
@@ -124,6 +129,8 @@
 #if GTEST_CAN_STREAM_RESULTS_
 # include <arpa/inet.h>  // NOLINT
 # include <netdb.h>  // NOLINT
+# include <sys/socket.h>  // NOLINT
+# include <sys/types.h>  // NOLINT
 #endif
 
 // Indicates that this translation unit is part of Google Test's
@@ -183,6 +190,12 @@ bool g_help_flag = false;
 }  // namespace internal
 
 static const char* GetDefaultFilter() {
+#ifdef GTEST_TEST_FILTER_ENV_VAR_
+  const char* const testbridge_test_only = getenv(GTEST_TEST_FILTER_ENV_VAR_);
+  if (testbridge_test_only != NULL) {
+    return testbridge_test_only;
+  }
+#endif  // GTEST_TEST_FILTER_ENV_VAR_
   return kUniversalFilter;
 }
 
@@ -283,6 +296,13 @@ GTEST_DEFINE_bool_(
     "if exceptions are enabled or exit the program with a non-zero code "
     "otherwise.");
 
+#if GTEST_USE_OWN_FLAGFILE_FLAG_
+GTEST_DEFINE_string_(
+    flagfile,
+    internal::StringFromGTestEnv("flagfile", ""),
+    "This flag specifies the flagfile to read command-line flags from.");
+#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
+
 namespace internal {
 
 // Generates a random number from [0, range), using a Linear
@@ -307,13 +327,7 @@ UInt32 Random::Generate(UInt32 range) {
 // 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().
-//
-// A user must call testing::InitGoogleTest() to initialize Google
-// Test.  g_init_gtest_count is set to the number of times
-// InitGoogleTest() has been called.  We don't protect this variable
-// under a mutex as it is only accessed in the main thread.
-GTEST_API_ int g_init_gtest_count = 0;
-static bool GTestIsInitialized() { return g_init_gtest_count != 0; }
+static bool GTestIsInitialized() { return GetArgvs().size() > 0; }
 
 // Iterates over a vector of TestCases, keeping a running sum of the
 // results of calling a given int-returning method on each.
@@ -369,8 +383,16 @@ void AssertHelper::operator=(const Message& message) const {
 // Mutex for linked pointers.
 GTEST_API_ GTEST_DEFINE_STATIC_MUTEX_(g_linked_ptr_mutex);
 
-// Application pathname gotten in InitGoogleTest.
-std::string g_executable_path;
+// A copy of all command line arguments.  Set by InitGoogleTest().
+::std::vector<testing::internal::string> g_argvs;
+
+const ::std::vector<testing::internal::string>& GetArgvs() {
+#if defined(GTEST_CUSTOM_GET_ARGVS_)
+  return GTEST_CUSTOM_GET_ARGVS_();
+#else  // defined(GTEST_CUSTOM_GET_ARGVS_)
+  return g_argvs;
+#endif  // defined(GTEST_CUSTOM_GET_ARGVS_)
+}
 
 // Returns the current application's name, removing directory path if that
 // is present.
@@ -378,9 +400,9 @@ FilePath GetCurrentExecutableName() {
   FilePath result;
 
 #if GTEST_OS_WINDOWS
-  result.Set(FilePath(g_executable_path).RemoveExtension("exe"));
+  result.Set(FilePath(GetArgvs()[0]).RemoveExtension("exe"));
 #else
-  result.Set(FilePath(g_executable_path));
+  result.Set(FilePath(GetArgvs()[0]));
 #endif  // GTEST_OS_WINDOWS
 
   return result.RemoveDirectoryName();
@@ -772,8 +794,12 @@ int UnitTestImpl::test_to_run_count() const {
 // CurrentOsStackTraceExceptTop(1), Foo() will be included in the
 // trace but Bar() and CurrentOsStackTraceExceptTop() won't.
 std::string UnitTestImpl::CurrentOsStackTraceExceptTop(int skip_count) {
-  (void)skip_count;
-  return "";
+  return os_stack_trace_getter()->CurrentStackTrace(
+      static_cast<int>(GTEST_FLAG(stack_trace_depth)),
+      skip_count + 1
+      // Skips the user-specified number of frames plus this function
+      // itself.
+      );  // NOLINT
 }
 
 // Returns the current time in milliseconds.
@@ -802,21 +828,13 @@ TimeInMillis GetTimeInMillis() {
 #elif GTEST_OS_WINDOWS && !GTEST_HAS_GETTIMEOFDAY_
   __timeb64 now;
 
-# ifdef _MSC_VER
-
   // MSVC 8 deprecates _ftime64(), so we want to suppress warning 4996
   // (deprecated function) there.
   // TODO(kenton@google.com): Use GetTickCount()?  Or use
   //   SystemTimeToFileTime()
-#  pragma warning(push)          // Saves the current warning state.
-#  pragma warning(disable:4996)  // Temporarily disables warning 4996.
-  _ftime64(&now);
-#  pragma warning(pop)           // Restores the warning state.
-# else
-
+  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996)
   _ftime64(&now);
-
-# endif  // _MSC_VER
+  GTEST_DISABLE_MSC_WARNINGS_POP_()
 
   return static_cast<TimeInMillis>(now.time) * 1000 + now.millitm;
 #elif GTEST_HAS_GETTIMEOFDAY_
@@ -901,6 +919,23 @@ static void StreamWideCharsToMessage(const wchar_t* wstr, size_t length,
 
 #endif  // GTEST_HAS_STD_WSTRING || GTEST_HAS_GLOBAL_WSTRING
 
+void SplitString(const ::std::string& str, char delimiter,
+                 ::std::vector< ::std::string>* dest) {
+  ::std::vector< ::std::string> parsed;
+  ::std::string::size_type pos = 0;
+  while (::testing::internal::AlwaysTrue()) {
+    const ::std::string::size_type colon = str.find(delimiter, pos);
+    if (colon == ::std::string::npos) {
+      parsed.push_back(str.substr(pos));
+      break;
+    } else {
+      parsed.push_back(str.substr(pos, colon - pos));
+      pos = colon + 1;
+    }
+  }
+  dest->swap(parsed);
+}
+
 }  // namespace internal
 
 // Constructs an empty Message.
@@ -956,6 +991,13 @@ AssertionResult::AssertionResult(const AssertionResult& other)
                static_cast< ::std::string*>(NULL)) {
 }
 
+// Swaps two AssertionResults.
+void AssertionResult::swap(AssertionResult& other) {
+  using std::swap;
+  swap(success_, other.success_);
+  swap(message_, other.message_);
+}
+
 // Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
 AssertionResult AssertionResult::operator!() const {
   AssertionResult negation(!success_);
@@ -982,6 +1024,276 @@ AssertionResult AssertionFailure(const Message& message) {
 
 namespace internal {
 
+namespace edit_distance {
+std::vector<EditType> CalculateOptimalEdits(const std::vector<size_t>& left,
+                                            const std::vector<size_t>& right) {
+  std::vector<std::vector<double> > costs(
+      left.size() + 1, std::vector<double>(right.size() + 1));
+  std::vector<std::vector<EditType> > best_move(
+      left.size() + 1, std::vector<EditType>(right.size() + 1));
+
+  // Populate for empty right.
+  for (size_t l_i = 0; l_i < costs.size(); ++l_i) {
+    costs[l_i][0] = static_cast<double>(l_i);
+    best_move[l_i][0] = kRemove;
+  }
+  // Populate for empty left.
+  for (size_t r_i = 1; r_i < costs[0].size(); ++r_i) {
+    costs[0][r_i] = static_cast<double>(r_i);
+    best_move[0][r_i] = kAdd;
+  }
+
+  for (size_t l_i = 0; l_i < left.size(); ++l_i) {
+    for (size_t r_i = 0; r_i < right.size(); ++r_i) {
+      if (left[l_i] == right[r_i]) {
+        // Found a match. Consume it.
+        costs[l_i + 1][r_i + 1] = costs[l_i][r_i];
+        best_move[l_i + 1][r_i + 1] = kMatch;
+        continue;
+      }
+
+      const double add = costs[l_i + 1][r_i];
+      const double remove = costs[l_i][r_i + 1];
+      const double replace = costs[l_i][r_i];
+      if (add < remove && add < replace) {
+        costs[l_i + 1][r_i + 1] = add + 1;
+        best_move[l_i + 1][r_i + 1] = kAdd;
+      } else if (remove < add && remove < replace) {
+        costs[l_i + 1][r_i + 1] = remove + 1;
+        best_move[l_i + 1][r_i + 1] = kRemove;
+      } else {
+        // We make replace a little more expensive than add/remove to lower
+        // their priority.
+        costs[l_i + 1][r_i + 1] = replace + 1.00001;
+        best_move[l_i + 1][r_i + 1] = kReplace;
+      }
+    }
+  }
+
+  // Reconstruct the best path. We do it in reverse order.
+  std::vector<EditType> best_path;
+  for (size_t l_i = left.size(), r_i = right.size(); l_i > 0 || r_i > 0;) {
+    EditType move = best_move[l_i][r_i];
+    best_path.push_back(move);
+    l_i -= move != kAdd;
+    r_i -= move != kRemove;
+  }
+  std::reverse(best_path.begin(), best_path.end());
+  return best_path;
+}
+
+namespace {
+
+// Helper class to convert string into ids with deduplication.
+class InternalStrings {
+ public:
+  size_t GetId(const std::string& str) {
+    IdMap::iterator it = ids_.find(str);
+    if (it != ids_.end()) return it->second;
+    size_t id = ids_.size();
+    return ids_[str] = id;
+  }
+
+ private:
+  typedef std::map<std::string, size_t> IdMap;
+  IdMap ids_;
+};
+
+}  // namespace
+
+std::vector<EditType> CalculateOptimalEdits(
+    const std::vector<std::string>& left,
+    const std::vector<std::string>& right) {
+  std::vector<size_t> left_ids, right_ids;
+  {
+    InternalStrings intern_table;
+    for (size_t i = 0; i < left.size(); ++i) {
+      left_ids.push_back(intern_table.GetId(left[i]));
+    }
+    for (size_t i = 0; i < right.size(); ++i) {
+      right_ids.push_back(intern_table.GetId(right[i]));
+    }
+  }
+  return CalculateOptimalEdits(left_ids, right_ids);
+}
+
+namespace {
+
+// Helper class that holds the state for one hunk and prints it out to the
+// stream.
+// It reorders adds/removes when possible to group all removes before all
+// adds. It also adds the hunk header before printint into the stream.
+class Hunk {
+ public:
+  Hunk(size_t left_start, size_t right_start)
+      : left_start_(left_start),
+        right_start_(right_start),
+        adds_(),
+        removes_(),
+        common_() {}
+
+  void PushLine(char edit, const char* line) {
+    switch (edit) {
+      case ' ':
+        ++common_;
+        FlushEdits();
+        hunk_.push_back(std::make_pair(' ', line));
+        break;
+      case '-':
+        ++removes_;
+        hunk_removes_.push_back(std::make_pair('-', line));
+        break;
+      case '+':
+        ++adds_;
+        hunk_adds_.push_back(std::make_pair('+', line));
+        break;
+    }
+  }
+
+  void PrintTo(std::ostream* os) {
+    PrintHeader(os);
+    FlushEdits();
+    for (std::list<std::pair<char, const char*> >::const_iterator it =
+             hunk_.begin();
+         it != hunk_.end(); ++it) {
+      *os << it->first << it->second << "\n";
+    }
+  }
+
+  bool has_edits() const { return adds_ || removes_; }
+
+ private:
+  void FlushEdits() {
+    hunk_.splice(hunk_.end(), hunk_removes_);
+    hunk_.splice(hunk_.end(), hunk_adds_);
+  }
+
+  // Print a unified diff header for one hunk.
+  // The format is
+  //   "@@ -<left_start>,<left_length> +<right_start>,<right_length> @@"
+  // where the left/right parts are ommitted if unnecessary.
+  void PrintHeader(std::ostream* ss) const {
+    *ss << "@@ ";
+    if (removes_) {
+      *ss << "-" << left_start_ << "," << (removes_ + common_);
+    }
+    if (removes_ && adds_) {
+      *ss << " ";
+    }
+    if (adds_) {
+      *ss << "+" << right_start_ << "," << (adds_ + common_);
+    }
+    *ss << " @@\n";
+  }
+
+  size_t left_start_, right_start_;
+  size_t adds_, removes_, common_;
+  std::list<std::pair<char, const char*> > hunk_, hunk_adds_, hunk_removes_;
+};
+
+}  // namespace
+
+// Create a list of diff hunks in Unified diff format.
+// Each hunk has a header generated by PrintHeader above plus a body with
+// lines prefixed with ' ' for no change, '-' for deletion and '+' for
+// addition.
+// 'context' represents the desired unchanged prefix/suffix around the diff.
+// If two hunks are close enough that their contexts overlap, then they are
+// joined into one hunk.
+std::string CreateUnifiedDiff(const std::vector<std::string>& left,
+                              const std::vector<std::string>& right,
+                              size_t context) {
+  const std::vector<EditType> edits = CalculateOptimalEdits(left, right);
+
+  size_t l_i = 0, r_i = 0, edit_i = 0;
+  std::stringstream ss;
+  while (edit_i < edits.size()) {
+    // Find first edit.
+    while (edit_i < edits.size() && edits[edit_i] == kMatch) {
+      ++l_i;
+      ++r_i;
+      ++edit_i;
+    }
+
+    // Find the first line to include in the hunk.
+    const size_t prefix_context = std::min(l_i, context);
+    Hunk hunk(l_i - prefix_context + 1, r_i - prefix_context + 1);
+    for (size_t i = prefix_context; i > 0; --i) {
+      hunk.PushLine(' ', left[l_i - i].c_str());
+    }
+
+    // Iterate the edits until we found enough suffix for the hunk or the input
+    // is over.
+    size_t n_suffix = 0;
+    for (; edit_i < edits.size(); ++edit_i) {
+      if (n_suffix >= context) {
+        // Continue only if the next hunk is very close.
+        std::vector<EditType>::const_iterator it = edits.begin() + edit_i;
+        while (it != edits.end() && *it == kMatch) ++it;
+        if (it == edits.end() || (it - edits.begin()) - edit_i >= context) {
+          // There is no next edit or it is too far away.
+          break;
+        }
+      }
+
+      EditType edit = edits[edit_i];
+      // Reset count when a non match is found.
+      n_suffix = edit == kMatch ? n_suffix + 1 : 0;
+
+      if (edit == kMatch || edit == kRemove || edit == kReplace) {
+        hunk.PushLine(edit == kMatch ? ' ' : '-', left[l_i].c_str());
+      }
+      if (edit == kAdd || edit == kReplace) {
+        hunk.PushLine('+', right[r_i].c_str());
+      }
+
+      // Advance indices, depending on edit type.
+      l_i += edit != kAdd;
+      r_i += edit != kRemove;
+    }
+
+    if (!hunk.has_edits()) {
+      // We are done. We don't want this hunk.
+      break;
+    }
+
+    hunk.PrintTo(&ss);
+  }
+  return ss.str();
+}
+
+}  // namespace edit_distance
+
+namespace {
+
+// The string representation of the values received in EqFailure() are already
+// escaped. Split them on escaped '\n' boundaries. Leave all other escaped
+// characters the same.
+std::vector<std::string> SplitEscapedString(const std::string& str) {
+  std::vector<std::string> lines;
+  size_t start = 0, end = str.size();
+  if (end > 2 && str[0] == '"' && str[end - 1] == '"') {
+    ++start;
+    --end;
+  }
+  bool escaped = false;
+  for (size_t i = start; i + 1 < end; ++i) {
+    if (escaped) {
+      escaped = false;
+      if (str[i] == 'n') {
+        lines.push_back(str.substr(start, i - start - 1));
+        start = i + 1;
+      }
+    } else {
+      escaped = str[i] == '\\';
+    }
+  }
+  lines.push_back(str.substr(start, end - start));
+  return lines;
+}
+
+}  // namespace
+
 // Constructs and returns the message for an equality assertion
 // (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
 //
@@ -989,31 +1301,42 @@ namespace internal {
 // and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
 // where foo is 5 and bar is 6, we have:
 //
-//   expected_expression: "foo"
-//   actual_expression:   "bar"
-//   expected_value:      "5"
-//   actual_value:        "6"
+//   lhs_expression: "foo"
+//   rhs_expression: "bar"
+//   lhs_value:      "5"
+//   rhs_value:      "6"
 //
 // The ignoring_case parameter is true iff the assertion is a
-// *_STRCASEEQ*.  When it's true, the string " (ignoring case)" will
+// *_STRCASEEQ*.  When it's true, the string "Ignoring case" will
 // be inserted into the message.
-AssertionResult EqFailure(const char* expected_expression,
-                          const char* actual_expression,
-                          const std::string& expected_value,
-                          const std::string& actual_value,
+AssertionResult EqFailure(const char* lhs_expression,
+                          const char* rhs_expression,
+                          const std::string& lhs_value,
+                          const std::string& rhs_value,
                           bool ignoring_case) {
   Message msg;
-  msg << "Value of: " << actual_expression;
-  if (actual_value != actual_expression) {
-    msg << "\n  Actual: " << actual_value;
+  msg << "      Expected: " << lhs_expression;
+  if (lhs_value != lhs_expression) {
+    msg << "\n      Which is: " << lhs_value;
+  }
+  msg << "\nTo be equal to: " << rhs_expression;
+  if (rhs_value != rhs_expression) {
+    msg << "\n      Which is: " << rhs_value;
   }
 
-  msg << "\nExpected: " << expected_expression;
   if (ignoring_case) {
-    msg << " (ignoring case)";
+    msg << "\nIgnoring case";
   }
-  if (expected_value != expected_expression) {
-    msg << "\nWhich is: " << expected_value;
+
+  if (!lhs_value.empty() && !rhs_value.empty()) {
+    const std::vector<std::string> lhs_lines =
+        SplitEscapedString(lhs_value);
+    const std::vector<std::string> rhs_lines =
+        SplitEscapedString(rhs_value);
+    if (lhs_lines.size() > 1 || rhs_lines.size() > 1) {
+      msg << "\nWith diff:\n"
+          << edit_distance::CreateUnifiedDiff(lhs_lines, rhs_lines);
+    }
   }
 
   return AssertionFailure() << msg;
@@ -1111,18 +1434,18 @@ namespace internal {
 
 // The helper function for {ASSERT|EXPECT}_EQ with int or enum
 // arguments.
-AssertionResult CmpHelperEQ(const char* expected_expression,
-                            const char* actual_expression,
-                            BiggestInt expected,
-                            BiggestInt actual) {
-  if (expected == actual) {
+AssertionResult CmpHelperEQ(const char* lhs_expression,
+                            const char* rhs_expression,
+                            BiggestInt lhs,
+                            BiggestInt rhs) {
+  if (lhs == rhs) {
     return AssertionSuccess();
   }
 
-  return EqFailure(expected_expression,
-                   actual_expression,
-                   FormatForComparisonFailureMessage(expected, actual),
-                   FormatForComparisonFailureMessage(actual, expected),
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   FormatForComparisonFailureMessage(lhs, rhs),
+                   FormatForComparisonFailureMessage(rhs, lhs),
                    false);
 }
 
@@ -1161,34 +1484,34 @@ GTEST_IMPL_CMP_HELPER_(GT, > )
 #undef GTEST_IMPL_CMP_HELPER_
 
 // The helper function for {ASSERT|EXPECT}_STREQ.
-AssertionResult CmpHelperSTREQ(const char* expected_expression,
-                               const char* actual_expression,
-                               const char* expected,
-                               const char* actual) {
-  if (String::CStringEquals(expected, actual)) {
+AssertionResult CmpHelperSTREQ(const char* lhs_expression,
+                               const char* rhs_expression,
+                               const char* lhs,
+                               const char* rhs) {
+  if (String::CStringEquals(lhs, rhs)) {
     return AssertionSuccess();
   }
 
-  return EqFailure(expected_expression,
-                   actual_expression,
-                   PrintToString(expected),
-                   PrintToString(actual),
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   PrintToString(lhs),
+                   PrintToString(rhs),
                    false);
 }
 
 // The helper function for {ASSERT|EXPECT}_STRCASEEQ.
-AssertionResult CmpHelperSTRCASEEQ(const char* expected_expression,
-                                   const char* actual_expression,
-                                   const char* expected,
-                                   const char* actual) {
-  if (String::CaseInsensitiveCStringEquals(expected, actual)) {
+AssertionResult CmpHelperSTRCASEEQ(const char* lhs_expression,
+                                   const char* rhs_expression,
+                                   const char* lhs,
+                                   const char* rhs) {
+  if (String::CaseInsensitiveCStringEquals(lhs, rhs)) {
     return AssertionSuccess();
   }
 
-  return EqFailure(expected_expression,
-                   actual_expression,
-                   PrintToString(expected),
-                   PrintToString(actual),
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   PrintToString(lhs),
+                   PrintToString(rhs),
                    true);
 }
 
@@ -1461,7 +1784,7 @@ std::string CodePointToUtf8(UInt32 code_point) {
   return str;
 }
 
-// The following two functions only make sense if the system
+// The following two functions only make sense if the the system
 // uses UTF-16 for wide string encoding. All supported systems
 // with 16 bit wchar_t (Windows, Cygwin, Symbian OS) do use UTF-16.
 
@@ -1543,18 +1866,18 @@ bool String::WideCStringEquals(const wchar_t * lhs, const wchar_t * rhs) {
 }
 
 // Helper function for *_STREQ on wide strings.
-AssertionResult CmpHelperSTREQ(const char* expected_expression,
-                               const char* actual_expression,
-                               const wchar_t* expected,
-                               const wchar_t* actual) {
-  if (String::WideCStringEquals(expected, actual)) {
+AssertionResult CmpHelperSTREQ(const char* lhs_expression,
+                               const char* rhs_expression,
+                               const wchar_t* lhs,
+                               const wchar_t* rhs) {
+  if (String::WideCStringEquals(lhs, rhs)) {
     return AssertionSuccess();
   }
 
-  return EqFailure(expected_expression,
-                   actual_expression,
-                   PrintToString(expected),
-                   PrintToString(actual),
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   PrintToString(lhs),
+                   PrintToString(rhs),
                    false);
 }
 
@@ -1887,14 +2210,15 @@ int TestResult::test_property_count() const {
 
 // Creates a Test object.
 
-// The c'tor saves the values of all Google Test flags.
+// The c'tor saves the states of all flags.
 Test::Test()
-    : gtest_flag_saver_(new internal::GTestFlagSaver) {
+    : gtest_flag_saver_(new GTEST_FLAG_SAVER_) {
 }
 
-// The d'tor restores the values of all Google Test flags.
+// The d'tor restores the states of all flags.  The actual work is
+// done by the d'tor of the gtest_flag_saver_ field, and thus not
+// visible here.
 Test::~Test() {
-  delete gtest_flag_saver_;
 }
 
 // Sets up the test fixture.
@@ -1963,8 +2287,8 @@ bool Test::HasSameFixtureClass() {
     const bool this_is_TEST = this_fixture_id == internal::GetTestTypeId();
 
     if (first_is_TEST || this_is_TEST) {
-      // The user mixed TEST and TEST_F in this test case - we'll tell
-      // him/her how to fix it.
+      // Both TEST and TEST_F appear in same test case, which is incorrect.
+      // Tell the user how to fix this.
 
       // Gets the name of the TEST and the name of the TEST_F.  Note
       // that first_is_TEST and this_is_TEST cannot both be true, as
@@ -1984,8 +2308,8 @@ bool Test::HasSameFixtureClass() {
           << "want to change the TEST to TEST_F or move it to another test\n"
           << "case.";
     } else {
-      // The user defined two fixture classes with the same name in
-      // two namespaces - we'll tell him/her how to fix it.
+      // Two fixture classes with the same name appear in two different
+      // namespaces, which is not allowed. Tell the user how to fix this.
       ADD_FAILURE()
           << "All tests in the same test case must use the same test fixture\n"
           << "class.  However, in test case "
@@ -2178,12 +2502,14 @@ TestInfo::TestInfo(const std::string& a_test_case_name,
                    const std::string& a_name,
                    const char* a_type_param,
                    const char* a_value_param,
+                   internal::CodeLocation a_code_location,
                    internal::TypeId fixture_class_id,
                    internal::TestFactoryBase* factory)
     : test_case_name_(a_test_case_name),
       name_(a_name),
       type_param_(a_type_param ? new std::string(a_type_param) : NULL),
       value_param_(a_value_param ? new std::string(a_value_param) : NULL),
+      location_(a_code_location),
       fixture_class_id_(fixture_class_id),
       should_run_(false),
       is_disabled_(false),
@@ -2207,6 +2533,7 @@ namespace internal {
 //                     this is not a typed or a type-parameterized test.
 //   value_param:      text representation of the test's value parameter,
 //                     or NULL if this is not a value-parameterized test.
+//   code_location:    code location where the test is defined
 //   fixture_class_id: ID of the test fixture class
 //   set_up_tc:        pointer to the function that sets up the test case
 //   tear_down_tc:     pointer to the function that tears down the test case
@@ -2218,20 +2545,21 @@ TestInfo* MakeAndRegisterTestInfo(
     const char* name,
     const char* type_param,
     const char* value_param,
+    CodeLocation code_location,
     TypeId fixture_class_id,
     SetUpTestCaseFunc set_up_tc,
     TearDownTestCaseFunc tear_down_tc,
     TestFactoryBase* factory) {
   TestInfo* const test_info =
       new TestInfo(test_case_name, name, type_param, value_param,
-                   fixture_class_id, factory);
+                   code_location, fixture_class_id, factory);
   GetUnitTestImpl()->AddTestInfo(set_up_tc, tear_down_tc, test_info);
   return test_info;
 }
 
 #if GTEST_HAS_PARAM_TEST
 void ReportInvalidTestCaseType(const char* test_case_name,
-                               const char* file, int line) {
+                               CodeLocation code_location) {
   Message errors;
   errors
       << "Attempted redefinition of test case " << test_case_name << ".\n"
@@ -2243,7 +2571,9 @@ void ReportInvalidTestCaseType(const char* test_case_name,
       << "probably rename one of the classes to put the tests into different\n"
       << "test cases.";
 
-  fprintf(stderr, "%s %s", FormatFileLocation(file, line).c_str(),
+  fprintf(stderr, "%s %s",
+          FormatFileLocation(code_location.file.c_str(),
+                             code_location.line).c_str(),
           errors.GetString().c_str());
 }
 #endif  // GTEST_HAS_PARAM_TEST
@@ -2554,7 +2884,8 @@ enum GTestColor {
   COLOR_YELLOW
 };
 
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
+#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
+    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
 
 // Returns the character attribute for the given color.
 WORD GetColorAttribute(GTestColor color) {
@@ -2599,6 +2930,10 @@ bool ShouldUseColor(bool stdout_is_tty) {
         String::CStringEquals(term, "xterm-256color") ||
         String::CStringEquals(term, "screen") ||
         String::CStringEquals(term, "screen-256color") ||
+        String::CStringEquals(term, "tmux") ||
+        String::CStringEquals(term, "tmux-256color") ||
+        String::CStringEquals(term, "rxvt-unicode") ||
+        String::CStringEquals(term, "rxvt-unicode-256color") ||
         String::CStringEquals(term, "linux") ||
         String::CStringEquals(term, "cygwin");
     return stdout_is_tty && term_supports_color;
@@ -2622,8 +2957,9 @@ void ColoredPrintf(GTestColor color, const char* fmt, ...) {
   va_list args;
   va_start(args, fmt);
 
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_SYMBIAN || GTEST_OS_ZOS || GTEST_OS_IOS
-  const bool use_color = false;
+#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_SYMBIAN || GTEST_OS_ZOS || \
+    GTEST_OS_IOS || GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT
+  const bool use_color = AlwaysFalse();
 #else
   static const bool in_color_mode =
       ShouldUseColor(posix::IsATTY(posix::FileNo(stdout)) != 0);
@@ -2637,7 +2973,8 @@ void ColoredPrintf(GTestColor color, const char* fmt, ...) {
     return;
   }
 
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
+#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
+    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
   const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
 
   // Gets the current text color.
@@ -3212,34 +3549,39 @@ std::string XmlUnitTestResultPrinter::RemoveInvalidXmlCharacters(
 // Formats the given time in milliseconds as seconds.
 std::string FormatTimeInMillisAsSeconds(TimeInMillis ms) {
   ::std::stringstream ss;
-  ss << ms/1000.0;
+  ss << (static_cast<double>(ms) * 1e-3);
   return ss.str();
 }
 
-// Converts the given epoch time in milliseconds to a date string in the ISO
-// 8601 format, without the timezone information.
-std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms) {
-  // Using non-reentrant version as localtime_r is not portable.
-  time_t seconds = static_cast<time_t>(ms / 1000);
-#ifdef _MSC_VER
-# pragma warning(push)          // Saves the current warning state.
-# pragma warning(disable:4996)  // Temporarily disables warning 4996
-                                // (function or variable may be unsafe).
-  const struct tm* const time_struct = localtime(&seconds);  // NOLINT
-# pragma warning(pop)           // Restores the warning state again.
+static bool PortableLocaltime(time_t seconds, struct tm* out) {
+#if defined(_MSC_VER)
+  return localtime_s(out, &seconds) == 0;
+#elif defined(__MINGW32__) || defined(__MINGW64__)
+  // MINGW <time.h> provides neither localtime_r nor localtime_s, but uses
+  // Windows' localtime(), which has a thread-local tm buffer.
+  struct tm* tm_ptr = localtime(&seconds);  // NOLINT
+  if (tm_ptr == NULL)
+    return false;
+  *out = *tm_ptr;
+  return true;
 #else
-  const struct tm* const time_struct = localtime(&seconds);  // NOLINT
+  return localtime_r(&seconds, out) != NULL;
 #endif
-  if (time_struct == NULL)
-    return "";  // Invalid ms value
+}
 
+// Converts the given epoch time in milliseconds to a date string in the ISO
+// 8601 format, without the timezone information.
+std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms) {
+  struct tm time_struct;
+  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
+    return "";
   // YYYY-MM-DDThh:mm:ss
-  return StreamableToString(time_struct->tm_year + 1900) + "-" +
-      String::FormatIntWidth2(time_struct->tm_mon + 1) + "-" +
-      String::FormatIntWidth2(time_struct->tm_mday) + "T" +
-      String::FormatIntWidth2(time_struct->tm_hour) + ":" +
-      String::FormatIntWidth2(time_struct->tm_min) + ":" +
-      String::FormatIntWidth2(time_struct->tm_sec);
+  return StreamableToString(time_struct.tm_year + 1900) + "-" +
+      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
+      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
+      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
+      String::FormatIntWidth2(time_struct.tm_min) + ":" +
+      String::FormatIntWidth2(time_struct.tm_sec);
 }
 
 // Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
@@ -3502,26 +3844,15 @@ ScopedTrace::~ScopedTrace()
 
 // class OsStackTraceGetter
 
-// Returns the current OS stack trace as an std::string.  Parameters:
-//
-//   max_depth  - the maximum number of stack frames to be included
-//                in the trace.
-//   skip_count - the number of top frames to be skipped; doesn't count
-//                against max_depth.
-//
-string OsStackTraceGetter::CurrentStackTrace(int /* max_depth */,
-                                             int /* skip_count */)
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  return "";
-}
+const char* const OsStackTraceGetterInterface::kElidedFramesMarker =
+    "... " GTEST_NAME_ " internal frames ...";
 
-void OsStackTraceGetter::UponLeavingGTest()
-    GTEST_LOCK_EXCLUDED_(mutex_) {
+string OsStackTraceGetter::CurrentStackTrace(int /*max_depth*/,
+                                             int /*skip_count*/) {
+  return "";
 }
 
-const char* const
-OsStackTraceGetter::kElidedFramesMarker =
-    "... " GTEST_NAME_ " internal frames ...";
+void OsStackTraceGetter::UponLeavingGTest() {}
 
 // A helper class that creates the premature-exit file in its
 // constructor and deletes the file in its destructor.
@@ -3812,7 +4143,7 @@ void UnitTest::AddTestPartResult(
     // with another testing framework) and specify the former on the
     // command line for debugging.
     if (GTEST_FLAG(break_on_failure)) {
-#if GTEST_OS_WINDOWS
+#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
       // Using DebugBreak on Windows allows gtest to still break into a debugger
       // when a failure happens and both the --gtest_break_on_failure and
       // the --gtest_catch_exceptions flags are specified.
@@ -3890,7 +4221,7 @@ int UnitTest::Run() {
   // process. In either case the user does not want to see pop-up dialogs
   // about crashes - they are expected.
   if (impl()->catch_exceptions() || in_death_test_child_process) {
-# if !GTEST_OS_WINDOWS_MOBILE
+# if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
     // SetErrorMode doesn't exist on CE.
     SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOALIGNMENTFAULTEXCEPT |
                  SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX);
@@ -3993,17 +4324,10 @@ namespace internal {
 
 UnitTestImpl::UnitTestImpl(UnitTest* parent)
     : parent_(parent),
-#ifdef _MSC_VER
-# pragma warning(push)                    // Saves the current warning state.
-# pragma warning(disable:4355)            // Temporarily disables warning 4355
-                                         // (using this in initializer).
+      GTEST_DISABLE_MSC_WARNINGS_PUSH_(4355 /* using this in initializer */)
       default_global_test_part_result_reporter_(this),
       default_per_thread_test_part_result_reporter_(this),
-# pragma warning(pop)                     // Restores the warning state again.
-#else
-      default_global_test_part_result_reporter_(this),
-      default_per_thread_test_part_result_reporter_(this),
-#endif  // _MSC_VER
+      GTEST_DISABLE_MSC_WARNINGS_POP_()
       global_test_part_result_repoter_(
           &default_global_test_part_result_reporter_),
       per_thread_test_part_result_reporter_(
@@ -4114,6 +4438,11 @@ void UnitTestImpl::PostFlagParsingInit() {
   if (!post_flag_parse_init_performed_) {
     post_flag_parse_init_performed_ = true;
 
+#if defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
+    // Register to send notifications about key process state changes.
+    listeners()->Append(new GTEST_CUSTOM_TEST_EVENT_LISTENER_());
+#endif  // defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
+
 #if GTEST_HAS_DEATH_TEST
     InitDeathTestSubprocessControlInfo();
     SuppressTestEventsIfInSubprocess();
@@ -4247,6 +4576,11 @@ bool UnitTestImpl::RunAllTests() {
 
 #if GTEST_HAS_DEATH_TEST
   in_subprocess_for_death_test = (internal_run_death_test_flag_.get() != NULL);
+# if defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
+  if (in_subprocess_for_death_test) {
+    GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_();
+  }
+# endif  // defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
 #endif  // GTEST_HAS_DEATH_TEST
 
   const bool should_shard = ShouldShard(kTestTotalShards, kTestShardIndex,
@@ -4583,7 +4917,11 @@ void UnitTestImpl::set_os_stack_trace_getter(
 // getter, and returns it.
 OsStackTraceGetterInterface* UnitTestImpl::os_stack_trace_getter() {
   if (os_stack_trace_getter_ == NULL) {
+#ifdef GTEST_OS_STACK_TRACE_GETTER_
+    os_stack_trace_getter_ = new GTEST_OS_STACK_TRACE_GETTER_;
+#else
     os_stack_trace_getter_ = new OsStackTraceGetter;
+#endif  // GTEST_OS_STACK_TRACE_GETTER_
   }
 
   return os_stack_trace_getter_;
@@ -4882,6 +5220,58 @@ static const char kColorEncodedHelpMessage[] =
 "(not one in your own code or tests), please report it to\n"
 "@G<" GTEST_DEV_EMAIL_ ">@D.\n";
 
+bool ParseGoogleTestFlag(const char* const arg) {
+  return 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, kRandomSeedFlag, &GTEST_FLAG(random_seed)) ||
+      ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
+      ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) ||
+      ParseInt32Flag(arg, kStackTraceDepthFlag,
+                     &GTEST_FLAG(stack_trace_depth)) ||
+      ParseStringFlag(arg, kStreamResultToFlag,
+                      &GTEST_FLAG(stream_result_to)) ||
+      ParseBoolFlag(arg, kThrowOnFailureFlag,
+                    &GTEST_FLAG(throw_on_failure));
+}
+
+#if GTEST_USE_OWN_FLAGFILE_FLAG_
+void LoadFlagsFromFile(const std::string& path) {
+  FILE* flagfile = posix::FOpen(path.c_str(), "r");
+  if (!flagfile) {
+    fprintf(stderr,
+            "Unable to open file \"%s\"\n",
+            GTEST_FLAG(flagfile).c_str());
+    fflush(stderr);
+    exit(EXIT_FAILURE);
+  }
+  std::string contents(ReadEntireFile(flagfile));
+  posix::FClose(flagfile);
+  std::vector<std::string> lines;
+  SplitString(contents, '\n', &lines);
+  for (size_t i = 0; i < lines.size(); ++i) {
+    if (lines[i].empty())
+      continue;
+    if (!ParseGoogleTestFlag(lines[i].c_str()))
+      g_help_flag = true;
+  }
+}
+#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
+
 // 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.
@@ -4895,35 +5285,24 @@ void ParseGoogleTestFlagsOnlyImpl(int* argc, CharType** argv) {
     using internal::ParseInt32Flag;
     using internal::ParseStringFlag;
 
-    // Do we see a Google Test flag?
-    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, kRandomSeedFlag, &GTEST_FLAG(random_seed)) ||
-        ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
-        ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) ||
-        ParseInt32Flag(arg, kStackTraceDepthFlag,
-                       &GTEST_FLAG(stack_trace_depth)) ||
-        ParseStringFlag(arg, kStreamResultToFlag,
-                        &GTEST_FLAG(stream_result_to)) ||
-        ParseBoolFlag(arg, kThrowOnFailureFlag,
-                      &GTEST_FLAG(throw_on_failure))
-        ) {
-      // Yes.  Shift the remainder of the argv list left by one.  Note
+    bool remove_flag = false;
+    if (ParseGoogleTestFlag(arg)) {
+      remove_flag = true;
+#if GTEST_USE_OWN_FLAGFILE_FLAG_
+    } else if (ParseStringFlag(arg, kFlagfileFlag, &GTEST_FLAG(flagfile))) {
+      LoadFlagsFromFile(GTEST_FLAG(flagfile));
+      remove_flag = true;
+#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
+    } else if (arg_string == "--help" || arg_string == "-h" ||
+               arg_string == "-?" || arg_string == "/?" ||
+               HasGoogleTestFlagPrefix(arg)) {
+      // Both help flag and unrecognized Google Test flags (excluding
+      // internal ones) trigger help display.
+      g_help_flag = true;
+    }
+
+    if (remove_flag) {
+      // Shift the remainder of the argv list left by one.  Note
       // that argv has (*argc + 1) elements, the last one always being
       // NULL.  The following loop moves the trailing NULL element as
       // well.
@@ -4937,12 +5316,6 @@ 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 == "/?" ||
-               HasGoogleTestFlagPrefix(arg)) {
-      // Both help flag and unrecognized Google Test flags (excluding
-      // internal ones) trigger help display.
-      g_help_flag = true;
     }
   }
 
@@ -4969,24 +5342,16 @@ void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv) {
 // wchar_t.
 template <typename CharType>
 void InitGoogleTestImpl(int* argc, CharType** argv) {
-  g_init_gtest_count++;
-
   // We don't want to run the initialization code twice.
-  if (g_init_gtest_count != 1) return;
+  if (GTestIsInitialized()) return;
 
   if (*argc <= 0) return;
 
-  internal::g_executable_path = internal::StreamableToString(argv[0]);
-
-#if GTEST_HAS_DEATH_TEST
-
   g_argvs.clear();
   for (int i = 0; i != *argc; i++) {
     g_argvs.push_back(StreamableToString(argv[i]));
   }
 
-#endif  // GTEST_HAS_DEATH_TEST
-
   ParseGoogleTestFlagsOnly(argc, argv);
   GetUnitTestImpl()->PostFlagParsingInit();
 }
@@ -5003,13 +5368,21 @@ void InitGoogleTestImpl(int* argc, CharType** argv) {
 //
 // Calling the function for the second time has no user-visible effect.
 void InitGoogleTest(int* argc, char** argv) {
+#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
+#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
   internal::InitGoogleTestImpl(argc, argv);
+#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
 }
 
 // This overloaded version can be used in Windows programs compiled in
 // UNICODE mode.
 void InitGoogleTest(int* argc, wchar_t** argv) {
+#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
+#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
   internal::InitGoogleTestImpl(argc, argv);
+#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
 }
 
 }  // namespace testing