Support piping log data over the service protocol

runtime/vm/service.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_SERVICE_H_
 #define VM_SERVICE_H_
 
 #include "include/dart_tools_api.h"
 
 #include "vm/allocation.h"
@@ skipping 90 matching lines @@
   static void SendEchoEvent(Isolate* isolate, const char* text);
   static void SendGraphEvent(Isolate* isolate);
   static void SendInspectEvent(Isolate* isolate, const Object& inspectee);
 
   static void SendEmbedderEvent(Isolate* isolate,
                                 const char* stream_id,
                                 const char* event_kind,
                                 const uint8_t* bytes,
                                 intptr_t bytes_len);
 
+  static void SendLogEvent(Isolate* isolate,
+                           int64_t sequence_number,
+                           int64_t timestamp,
+                           intptr_t level,
+                           const String& name,
+                           const String& message,
+                           const Instance& zone,
+                           const Object& error,
+                           const Instance& stack_trace);
+
   // Well-known streams.
   static StreamInfo isolate_stream;
   static StreamInfo debug_stream;
   static StreamInfo gc_stream;
   static StreamInfo echo_stream;
   static StreamInfo graph_stream;
+  static StreamInfo logging_stream;
 
   static bool ListenStream(const char* stream_id);
   static void CancelStream(const char* stream_id);
 
   static Dart_ServiceStreamListenCallback stream_listen_callback() {
     return stream_listen_callback_;
   }
   static Dart_ServiceStreamCancelCallback stream_cancel_callback() {
     return stream_cancel_callback_;
   }
 
  private:
   static void InvokeMethod(Isolate* isolate, const Array& message);
 
   static void EmbedderHandleMessage(EmbedderServiceHandler* handler,
                                     JSONStream* js);
 
   static EmbedderServiceHandler* FindIsolateEmbedderHandler(const char* name);
   static EmbedderServiceHandler* FindRootEmbedderHandler(const char* name);
 
   static void SendEvent(const char* stream_id,
                         const char* event_type,
                         const Object& eventMessage);
+
   // Does not take ownership of 'data'.
   static void SendEventWithData(const char* stream_id,
                                 const char* event_type,
                                 const String& meta,
                                 const uint8_t* data,
                                 intptr_t size);
 
+  static void PostEvent(const char* stream_id,
+                        const char* kind,
+                        JSONStream* event);
+
   static EmbedderServiceHandler* isolate_service_handler_head_;
   static EmbedderServiceHandler* root_service_handler_head_;
   static Dart_ServiceStreamListenCallback stream_listen_callback_;
   static Dart_ServiceStreamCancelCallback stream_cancel_callback_;
 
   static bool needs_isolate_events_;
   static bool needs_debug_events_;
   static bool needs_gc_events_;
   static bool needs_echo_events_;
   static bool needs_graph_events_;
 };
 
 }  // namespace dart
 
 #endif  // VM_SERVICE_H_