Restore "Add current rss and embedder name to Observatory"

runtime/bin/main.cc

 // Copyright (c) 2012, 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.
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "include/dart_api.h"
 #include "include/dart_tools_api.h"
@@ skipping 1341 matching lines @@
   }
   int64_t data[File::kStatSize];
   File::Stat(url + 7, data);
   if (data[File::kType] == File::kDoesNotExist) {
     return true;
   }
   bool modified = data[File::kModifiedTime] > since;
   return modified;
 }
 
+static void EmbedderInformationCallback(Dart_EmbedderInformation* info) {
+  int64_t max_rss = Process::MaxRSS();
+  int64_t current_rss = Process::CurrentRSS();
+
+  info->version = DART_EMBEDDER_INFORMATION_CURRENT_VERSION;
+  info->name = "Dart VM";
+  info->max_rss = max_rss >= 0 ? max_rss : 0;
+  info->current_rss = current_rss >= 0 ? current_rss : 0;
+}
+
 static void GenerateAppAOTSnapshot() {
   if (use_blobs) {
     Snapshot::GenerateAppAOTAsBlobs(snapshot_filename);
   } else {
     Snapshot::GenerateAppAOTAsAssembly(snapshot_filename);
   }
 }
 
 #define CHECK_RESULT(result)                                                   \
   if (Dart_IsError(result)) {                                                  \
@@ skipping 429 matching lines @@
   if (error != NULL) {
     EventHandler::Stop();
     Log::PrintErr("VM initialization failed: %s\n", error);
     free(error);
     Platform::Exit(kErrorExitCode);
   }
 
   Dart_SetServiceStreamCallbacks(&ServiceStreamListenCallback,
                                  &ServiceStreamCancelCallback);
   Dart_SetFileModifiedCallback(&FileModifiedCallback);
+  Dart_SetEmbedderInformationCallback(&EmbedderInformationCallback);
 
   // Run the main isolate until we aren't told to restart.
   while (RunMainIsolate(script_name, &dart_options)) {
     Log::PrintErr("Restarting VM\n");
   }
 
   // Terminate process exit-code handler.
   Process::TerminateExitCodeHandler();
 
   error = Dart_Cleanup();
@@ skipping 27 matching lines @@
   Platform::Exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }