Add MemorySanitizer annotations in gtest printers. Also remove unused variable...

Add MemorySanitizer annotations in gtest printers. Also remove unused variable kPathSeparatorString.

include/gtest/internal/gtest-port.h

@@ -782,6 +782,19 @@ 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
+#else
+# define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+#endif
+
 namespace testing {
 
 class Message;

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
 

src/gtest-printers.cc

@@ -56,6 +56,7 @@ namespace {
 using ::std::ostream;
 
 // Prints a segment of bytes in the given object.
+GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
 void PrintByteSegmentInObjectTo(const unsigned char* obj_bytes, size_t start,
                                 size_t count, ostream* os) {
   char text[5] = "";
@@ -252,6 +253,7 @@ 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_
 static void PrintCharsAsStringTo(
     const CharType* begin, size_t len, ostream* os) {
   const char* const kQuoteBegin = sizeof(CharType) == 1 ? "\"" : "L\"";
@@ -273,6 +275,7 @@ 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_
 static void UniversalPrintCharArray(
     const CharType* begin, size_t len, ostream* os) {
   // The code