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diff --git a/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.h b/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.h
new file mode 100644
index 000000000000..0f7e73cfee07
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.h
@@ -0,0 +1,127 @@
+//===-- ItaniumABILanguageRuntime.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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_LANGUAGERUNTIME_CPLUSPLUS_ITANIUMABI_ITANIUMABILANGUAGERUNTIME_H
+#define LLDB_SOURCE_PLUGINS_LANGUAGERUNTIME_CPLUSPLUS_ITANIUMABI_ITANIUMABILANGUAGERUNTIME_H
+
+#include <map>
+#include <mutex>
+#include <vector>
+
+#include "lldb/Breakpoint/BreakpointResolver.h"
+#include "lldb/Core/Value.h"
+#include "lldb/Symbol/Type.h"
+#include "lldb/Target/LanguageRuntime.h"
+#include "lldb/lldb-private.h"
+
+#include "Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.h"
+
+namespace lldb_private {
+
+class ItaniumABILanguageRuntime : public lldb_private::CPPLanguageRuntime {
+public:
+  ~ItaniumABILanguageRuntime() override = default;
+
+  // Static Functions
+  static void Initialize();
+
+  static void Terminate();
+
+  static lldb_private::LanguageRuntime *
+  CreateInstance(Process *process, lldb::LanguageType language);
+
+  static llvm::StringRef GetPluginNameStatic() { return "itanium"; }
+
+  static char ID;
+
+  bool isA(const void *ClassID) const override {
+    return ClassID == &ID || CPPLanguageRuntime::isA(ClassID);
+  }
+
+  static bool classof(const LanguageRuntime *runtime) {
+    return runtime->isA(&ID);
+  }
+
+
+  llvm::Expected<LanguageRuntime::VTableInfo>
+  GetVTableInfo(ValueObject &in_value, bool check_type) override;
+
+  bool GetDynamicTypeAndAddress(ValueObject &in_value,
+                                lldb::DynamicValueType use_dynamic,
+                                TypeAndOrName &class_type_or_name,
+                                Address &address,
+                                Value::ValueType &value_type) override;
+
+  TypeAndOrName FixUpDynamicType(const TypeAndOrName &type_and_or_name,
+                                 ValueObject &static_value) override;
+
+  bool CouldHaveDynamicValue(ValueObject &in_value) override;
+
+  void SetExceptionBreakpoints() override;
+
+  void ClearExceptionBreakpoints() override;
+
+  bool ExceptionBreakpointsAreSet() override;
+
+  bool ExceptionBreakpointsExplainStop(lldb::StopInfoSP stop_reason) override;
+
+  lldb::BreakpointResolverSP
+  CreateExceptionResolver(const lldb::BreakpointSP &bkpt,
+                          bool catch_bp, bool throw_bp) override;
+
+  lldb::SearchFilterSP CreateExceptionSearchFilter() override;
+
+  lldb::ValueObjectSP GetExceptionObjectForThread(
+      lldb::ThreadSP thread_sp) override;
+
+  // PluginInterface protocol
+  llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
+
+protected:
+  lldb::BreakpointResolverSP
+  CreateExceptionResolver(const lldb::BreakpointSP &bkpt,
+                          bool catch_bp, bool throw_bp, bool for_expressions);
+
+  lldb::BreakpointSP CreateExceptionBreakpoint(bool catch_bp, bool throw_bp,
+                                               bool for_expressions,
+                                               bool is_internal);
+
+private:
+  typedef std::map<lldb_private::Address, TypeAndOrName> DynamicTypeCache;
+  typedef std::map<lldb_private::Address, VTableInfo> VTableInfoCache;
+
+  ItaniumABILanguageRuntime(Process *process)
+      : // Call CreateInstance instead.
+        lldb_private::CPPLanguageRuntime(process) {}
+
+  lldb::BreakpointSP m_cxx_exception_bp_sp;
+  DynamicTypeCache m_dynamic_type_map;
+  VTableInfoCache m_vtable_info_map;
+  std::mutex m_mutex;
+
+  TypeAndOrName GetTypeInfo(ValueObject &in_value,
+                            const VTableInfo &vtable_info);
+
+  TypeAndOrName GetDynamicTypeInfo(const lldb_private::Address &vtable_addr);
+
+  void SetDynamicTypeInfo(const lldb_private::Address &vtable_addr,
+                          const TypeAndOrName &type_info);
+
+  // Check if a compiler type has a vtable.
+  //
+  // If the compiler type is a pointer or a reference, this function will check
+  // if the pointee type has a vtable, else it will check the type passed in.
+  //
+  // Returns an error if the type of the value doesn't have a vtable with an
+  // explanation why, or returns an Error::success() if the type has a vtable.
+  llvm::Error TypeHasVTable(CompilerType compiler_type);
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_SOURCE_PLUGINS_LANGUAGERUNTIME_CPLUSPLUS_ITANIUMABI_ITANIUMABILANGUAGERUNTIME_H