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diff --git a/contrib/llvm-project/lldb/source/Plugins/StructuredData/DarwinLog/StructuredDataDarwinLog.h b/contrib/llvm-project/lldb/source/Plugins/StructuredData/DarwinLog/StructuredDataDarwinLog.h
new file mode 100644
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+++ b/contrib/llvm-project/lldb/source/Plugins/StructuredData/DarwinLog/StructuredDataDarwinLog.h
@@ -0,0 +1,116 @@
+//===-- StructuredDataDarwinLog.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_STRUCTUREDDATA_DARWINLOG_STRUCTUREDDATADARWINLOG_H
+#define LLDB_SOURCE_PLUGINS_STRUCTUREDDATA_DARWINLOG_STRUCTUREDDATADARWINLOG_H
+
+#include "lldb/Target/StructuredDataPlugin.h"
+
+#include <mutex>
+
+// Forward declarations
+namespace sddarwinlog_private {
+class EnableCommand;
+}
+
+namespace lldb_private {
+
+class StructuredDataDarwinLog : public StructuredDataPlugin {
+  friend sddarwinlog_private::EnableCommand;
+
+public:
+  // Public static API
+
+  static void Initialize();
+
+  static void Terminate();
+
+  static llvm::StringRef GetStaticPluginName() { return "darwin-log"; }
+
+  /// Return whether the DarwinLog functionality is enabled.
+  ///
+  /// The DarwinLog functionality is enabled if the user explicitly enabled
+  /// it with the enable command, or if the user has the setting set
+  /// that controls if we always enable it for newly created/attached
+  /// processes.
+  ///
+  /// \return
+  ///      True if DarwinLog support is/will be enabled for existing or
+  ///      newly launched/attached processes.
+  static bool IsEnabled();
+
+  // PluginInterface API
+
+  llvm::StringRef GetPluginName() override { return GetStaticPluginName(); }
+
+  // StructuredDataPlugin API
+
+  bool SupportsStructuredDataType(llvm::StringRef type_name) override;
+
+  void HandleArrivalOfStructuredData(
+      Process &process, llvm::StringRef type_name,
+      const StructuredData::ObjectSP &object_sp) override;
+
+  Status GetDescription(const StructuredData::ObjectSP &object_sp,
+                        lldb_private::Stream &stream) override;
+
+  bool GetEnabled(llvm::StringRef type_name) const override;
+
+  void ModulesDidLoad(Process &process, ModuleList &module_list) override;
+
+  ~StructuredDataDarwinLog() override;
+
+private:
+  // Private constructors
+
+  StructuredDataDarwinLog(const lldb::ProcessWP &process_wp);
+
+  // Private static methods
+
+  static lldb::StructuredDataPluginSP CreateInstance(Process &process);
+
+  static void DebuggerInitialize(Debugger &debugger);
+
+  static bool InitCompletionHookCallback(void *baton,
+                                         StoppointCallbackContext *context,
+                                         lldb::user_id_t break_id,
+                                         lldb::user_id_t break_loc_id);
+
+  static Status FilterLaunchInfo(ProcessLaunchInfo &launch_info,
+                                 Target *target);
+
+  // Internal helper methods used by friend classes
+  void SetEnabled(bool enabled);
+
+  void AddInitCompletionHook(Process &process);
+
+  // Private methods
+
+  void DumpTimestamp(Stream &stream, uint64_t timestamp);
+
+  size_t DumpHeader(Stream &stream, const StructuredData::Dictionary &event);
+
+  size_t HandleDisplayOfEvent(const StructuredData::Dictionary &event,
+                              Stream &stream);
+
+  /// Call the enable command again, using whatever settings were initially
+  /// made.
+
+  void EnableNow();
+
+  // Private data
+  bool m_recorded_first_timestamp;
+  uint64_t m_first_timestamp_seen;
+  bool m_is_enabled;
+  std::mutex m_added_breakpoint_mutex;
+  bool m_added_breakpoint;
+  lldb::user_id_t m_breakpoint_id;
+};
+}
+
+#endif // LLDB_SOURCE_PLUGINS_STRUCTUREDDATA_DARWINLOG_STRUCTUREDDATADARWINLOG_H