Add print_stacktrace=1 to ubsan defaults.

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)
 #include <crt_externs.h>  // for _NSGetArgc, _NSGetArgv
 #include <string.h>
 #endif  // ADDRESS_SANITIZER && OS_MACOSX
 
-#if defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) || \
-    defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER)
+#if defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) ||  \
+    defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER) || \
+    defined(UNDEFINED_SANITIZER)
 // Functions returning default options are declared weak in the tools' runtime
 // libraries. To make the linker pick the strong replacements for those
 // functions from this module, we explicitly force its inclusion by passing
 // -Wl,-u_sanitizer_options_link_helper
 extern "C"
 void _sanitizer_options_link_helper() { }
 
 // The callbacks we define here will be called from the sanitizer runtime, but
 // aren't referenced from the Chrome executable. We must ensure that those
 // callbacks are not sanitizer-instrumented, and that they aren't stripped by
 // the linker.
-#define SANITIZER_HOOK_ATTRIBUTE          \
-  extern "C"                              \
-  __attribute__((no_sanitize_address))    \
-  __attribute__((no_sanitize_memory))     \
-  __attribute__((no_sanitize_thread))     \
-  __attribute__((visibility("default")))  \
+#define SANITIZER_HOOK_ATTRIBUTE                                           \
+  extern "C"                                                               \
+  __attribute__((no_sanitize("address", "memory", "thread", "undefined"))) \
+  __attribute__((visibility("default")))                                   \
   __attribute__((used))
 #endif
 
 #if defined(ADDRESS_SANITIZER)
 // Default options for AddressSanitizer in various configurations:
 //   malloc_context_size=5 - limit the size of stack traces collected by ASan
 //     for each malloc/free by 5 frames. These stack traces tend to accumulate
 //     very fast in applications using JIT (v8 in Chrome's case), see
 //     https://code.google.com/p/address-sanitizer/issues/detail?id=177
 //   symbolize=false - disable the in-process symbolization, which isn't 100%
@@ skipping 126 matching lines @@
   return kLsanDefaultOptions;
 }
 
 extern "C" char kLSanDefaultSuppressions[];
 
 SANITIZER_HOOK_ATTRIBUTE const char *__lsan_default_suppressions() {
   return kLSanDefaultSuppressions;
 }
 
 #endif  // LEAK_SANITIZER
+
+#if defined(UNDEFINED_SANITIZER)
+// Default options for UndefinedBehaviorSanitizer:
+//   print_stacktrace=1 - print the stacktrace when UBSan reports an error.
+const char kUbsanDefaultOptions[] = "print_stacktrace=1";
+
+SANITIZER_HOOK_ATTRIBUTE const char* __ubsan_default_options() {
+  return kUbsanDefaultOptions;
+}
+
+#endif  // UNDEFINED_SANITIZER