Add default MSan options.

build/sanitizers/sanitizer_options.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // This file contains the default options for various compiler-based dynamic
 // tools.
 
 #include "build/build_config.h"
 
 #if defined(ADDRESS_SANITIZER) && defined(OS_MACOSX)
@@ skipping 125 matching lines @@
 }
 
 extern "C" char kTSanDefaultSuppressions[];
 
 SANITIZER_HOOK_ATTRIBUTE const char *__tsan_default_suppressions() {
   return kTSanDefaultSuppressions;
 }
 
 #endif  // THREAD_SANITIZER && OS_LINUX
 
+#if defined(MEMORY_SANITIZER)
+// Default options for MemorySanitizer:
+//   intercept_memcmp=0 - do not detect uninitialized memory in memcmp() calls.
+//     Pending cleanup, see http://crbug.com/523428
+//   strip_path_prefix=Release/../../ - prefixes up to and including this
+//     substring will be stripped from source file paths in symbolized reports.
+const char kMsanDefaultOptions[] =
+    "intercept_memcmp=0 strip_path_prefix=Release/../../ ";
+
+SANITIZER_HOOK_ATTRIBUTE const char *__msan_default_options() {
+  return kMsanDefaultOptions;
+}
+
+#endif  // MEMORY_SANITIZER
+
 #if defined(LEAK_SANITIZER)
 // Default options for LeakSanitizer:
 //   print_suppressions=1 - print the list of matched suppressions.
 //   strip_path_prefix=Release/../../ - prefixes up to and including this
 //     substring will be stripped from source file paths in symbolized reports.
 const char kLsanDefaultOptions[] =
     "print_suppressions=1 strip_path_prefix=Release/../../ ";
 
 SANITIZER_HOOK_ATTRIBUTE const char *__lsan_default_options() {
   return kLsanDefaultOptions;
 }
 
 extern "C" char kLSanDefaultSuppressions[];
 
 SANITIZER_HOOK_ATTRIBUTE const char *__lsan_default_suppressions() {
   return kLSanDefaultSuppressions;
 }
 
 #endif  // LEAK_SANITIZER