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diff --git a/contrib/llvm-project/compiler-rt/lib/ubsan/ubsan_handlers_cxx.h b/contrib/llvm-project/compiler-rt/lib/ubsan/ubsan_handlers_cxx.h
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+++ b/contrib/llvm-project/compiler-rt/lib/ubsan/ubsan_handlers_cxx.h
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+//===-- ubsan_handlers_cxx.h ------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Entry points to the runtime library for Clang's undefined behavior sanitizer,
+// for C++-specific checks. This code is not linked into C binaries.
+//
+//===----------------------------------------------------------------------===//
+#ifndef UBSAN_HANDLERS_CXX_H
+#define UBSAN_HANDLERS_CXX_H
+
+#include "ubsan_value.h"
+
+namespace __ubsan {
+
+struct DynamicTypeCacheMissData {
+  SourceLocation Loc;
+  const TypeDescriptor &Type;
+  void *TypeInfo;
+  unsigned char TypeCheckKind;
+};
+
+/// \brief Handle a runtime type check failure, caused by an incorrect vptr.
+/// When this handler is called, all we know is that the type was not in the
+/// cache; this does not necessarily imply the existence of a bug.
+extern "C" SANITIZER_INTERFACE_ATTRIBUTE
+void __ubsan_handle_dynamic_type_cache_miss(
+  DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash);
+extern "C" SANITIZER_INTERFACE_ATTRIBUTE
+void __ubsan_handle_dynamic_type_cache_miss_abort(
+  DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash);
+}
+
+#endif // UBSAN_HANDLERS_CXX_H