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diff --git a/contrib/llvm-project/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.h b/contrib/llvm-project/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.h
new file mode 100644
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+++ b/contrib/llvm-project/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.h
@@ -0,0 +1,152 @@
+//===-- UnwindAssemblyInstEmulation.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_UNWINDASSEMBLY_INSTEMULATION_UNWINDASSEMBLYINSTEMULATION_H
+#define LLDB_SOURCE_PLUGINS_UNWINDASSEMBLY_INSTEMULATION_UNWINDASSEMBLYINSTEMULATION_H
+
+#include "lldb/Core/EmulateInstruction.h"
+#include "lldb/Symbol/UnwindPlan.h"
+#include "lldb/Target/UnwindAssembly.h"
+#include "lldb/Utility/RegisterValue.h"
+#include "lldb/lldb-private.h"
+
+class UnwindAssemblyInstEmulation : public lldb_private::UnwindAssembly {
+public:
+  ~UnwindAssemblyInstEmulation() override = default;
+
+  bool GetNonCallSiteUnwindPlanFromAssembly(
+      lldb_private::AddressRange &func, lldb_private::Thread &thread,
+      lldb_private::UnwindPlan &unwind_plan) override;
+
+  bool
+  GetNonCallSiteUnwindPlanFromAssembly(lldb_private::AddressRange &func,
+                                       uint8_t *opcode_data, size_t opcode_size,
+                                       lldb_private::UnwindPlan &unwind_plan);
+
+  bool
+  AugmentUnwindPlanFromCallSite(lldb_private::AddressRange &func,
+                                lldb_private::Thread &thread,
+                                lldb_private::UnwindPlan &unwind_plan) override;
+
+  bool GetFastUnwindPlan(lldb_private::AddressRange &func,
+                         lldb_private::Thread &thread,
+                         lldb_private::UnwindPlan &unwind_plan) override;
+
+  // thread may be NULL in which case we only use the Target (e.g. if this is
+  // called pre-process-launch).
+  bool
+  FirstNonPrologueInsn(lldb_private::AddressRange &func,
+                       const lldb_private::ExecutionContext &exe_ctx,
+                       lldb_private::Address &first_non_prologue_insn) override;
+
+  static lldb_private::UnwindAssembly *
+  CreateInstance(const lldb_private::ArchSpec &arch);
+
+  // PluginInterface protocol
+  static void Initialize();
+
+  static void Terminate();
+
+  static llvm::StringRef GetPluginNameStatic() { return "inst-emulation"; }
+
+  static llvm::StringRef GetPluginDescriptionStatic();
+
+  llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
+
+private:
+  // Call CreateInstance to get an instance of this class
+  UnwindAssemblyInstEmulation(const lldb_private::ArchSpec &arch,
+                              lldb_private::EmulateInstruction *inst_emulator)
+      : UnwindAssembly(arch), m_inst_emulator_up(inst_emulator),
+        m_range_ptr(nullptr), m_unwind_plan_ptr(nullptr), m_curr_row(),
+        m_initial_sp(0), m_cfa_reg_info(), m_fp_is_cfa(false),
+        m_register_values(), m_pushed_regs(), m_curr_row_modified(false),
+        m_forward_branch_offset(0) {
+    if (m_inst_emulator_up) {
+      m_inst_emulator_up->SetBaton(this);
+      m_inst_emulator_up->SetCallbacks(ReadMemory, WriteMemory, ReadRegister,
+                                       WriteRegister);
+    }
+  }
+
+  static size_t
+  ReadMemory(lldb_private::EmulateInstruction *instruction, void *baton,
+             const lldb_private::EmulateInstruction::Context &context,
+             lldb::addr_t addr, void *dst, size_t length);
+
+  static size_t
+  WriteMemory(lldb_private::EmulateInstruction *instruction, void *baton,
+              const lldb_private::EmulateInstruction::Context &context,
+              lldb::addr_t addr, const void *dst, size_t length);
+
+  static bool ReadRegister(lldb_private::EmulateInstruction *instruction,
+                           void *baton,
+                           const lldb_private::RegisterInfo *reg_info,
+                           lldb_private::RegisterValue &reg_value);
+
+  static bool
+  WriteRegister(lldb_private::EmulateInstruction *instruction, void *baton,
+                const lldb_private::EmulateInstruction::Context &context,
+                const lldb_private::RegisterInfo *reg_info,
+                const lldb_private::RegisterValue &reg_value);
+
+  //    size_t
+  //    ReadMemory (lldb_private::EmulateInstruction *instruction,
+  //                const lldb_private::EmulateInstruction::Context &context,
+  //                lldb::addr_t addr,
+  //                void *dst,
+  //                size_t length);
+
+  size_t WriteMemory(lldb_private::EmulateInstruction *instruction,
+                     const lldb_private::EmulateInstruction::Context &context,
+                     lldb::addr_t addr, const void *dst, size_t length);
+
+  bool ReadRegister(lldb_private::EmulateInstruction *instruction,
+                    const lldb_private::RegisterInfo *reg_info,
+                    lldb_private::RegisterValue &reg_value);
+
+  bool WriteRegister(lldb_private::EmulateInstruction *instruction,
+                     const lldb_private::EmulateInstruction::Context &context,
+                     const lldb_private::RegisterInfo *reg_info,
+                     const lldb_private::RegisterValue &reg_value);
+
+  static uint64_t
+  MakeRegisterKindValuePair(const lldb_private::RegisterInfo &reg_info);
+
+  void SetRegisterValue(const lldb_private::RegisterInfo &reg_info,
+                        const lldb_private::RegisterValue &reg_value);
+
+  bool GetRegisterValue(const lldb_private::RegisterInfo &reg_info,
+                        lldb_private::RegisterValue &reg_value);
+
+  std::unique_ptr<lldb_private::EmulateInstruction> m_inst_emulator_up;
+  lldb_private::AddressRange *m_range_ptr;
+  lldb_private::UnwindPlan *m_unwind_plan_ptr;
+  lldb_private::UnwindPlan::RowSP m_curr_row;
+  typedef std::map<uint64_t, uint64_t> PushedRegisterToAddrMap;
+  uint64_t m_initial_sp;
+  lldb_private::RegisterInfo m_cfa_reg_info;
+  bool m_fp_is_cfa;
+  typedef std::map<uint64_t, lldb_private::RegisterValue> RegisterValueMap;
+  RegisterValueMap m_register_values;
+  PushedRegisterToAddrMap m_pushed_regs;
+
+  // While processing the instruction stream, we need to communicate some state
+  // change
+  // information up to the higher level loop that makes decisions about how to
+  // push
+  // the unwind instructions for the UnwindPlan we're constructing.
+
+  // The instruction we're processing updated the UnwindPlan::Row contents
+  bool m_curr_row_modified;
+  // The instruction is branching forward with the given offset. 0 value means
+  // no branching.
+  uint32_t m_forward_branch_offset;
+};
+
+#endif // LLDB_SOURCE_PLUGINS_UNWINDASSEMBLY_INSTEMULATION_UNWINDASSEMBLYINSTEMULATION_H