First cut at _spawnUri rpc in the vm service.

runtime/lib/vmservice.cc

 // Copyright (c) 2015, 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 "vm/bootstrap_natives.h"
 #include "vm/dart_api_impl.h"
 #include "vm/datastream.h"
 #include "vm/exceptions.h"
 #include "vm/flags.h"
 #include "vm/growable_array.h"
 #include "vm/message.h"
 #include "vm/message_handler.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 #include "vm/port.h"
+#include "vm/service_event.h"
 #include "vm/service_isolate.h"
 #include "vm/symbols.h"
 
 namespace dart {
 
 DECLARE_FLAG(bool, trace_service);
 
 static uint8_t* allocator(uint8_t* ptr, intptr_t old_size, intptr_t new_size) {
   void* new_ptr = realloc(reinterpret_cast<void*>(ptr), new_size);
   return reinterpret_cast<uint8_t*>(new_ptr);
@@ skipping 417 matching lines @@
         thread->zone(), dart_contents));
     idx += 2;
   }
 
   return result_list.raw();
 #else
   return Object::null();
 #endif
 }
 
+
+
+DEFINE_NATIVE_ENTRY(VMService_spawnUriNotify, 2) {
+  GET_NON_NULL_NATIVE_ARGUMENT(Instance, result, arguments->NativeArgAt(0));
+  GET_NON_NULL_NATIVE_ARGUMENT(String, token, arguments->NativeArgAt(1));
+
+  if (result.IsSendPort()) {
+    Dart_Port id = SendPort::Cast(result).Id();
+    Isolate* isolate = PortMap::GetIsolate(id);
+    if (isolate != NULL) {
+      ServiceEvent spawn_event(isolate, ServiceEvent::kIsolateSpawn);
+      spawn_event.set_spawn_token(&token);
+      Service::HandleEvent(&spawn_event);
+    } else {
+      // There is no isolate at the control port anymore.  Must have
+      // died already.
+      ServiceEvent spawn_event(NULL, ServiceEvent::kIsolateSpawn);
+      const String& error = String::Handle(String::New(
+          "spawned isolate exited before notification completed"));
+      spawn_event.set_spawn_token(&token);
+      spawn_event.set_spawn_error(&error);
+      Service::HandleEvent(&spawn_event);
+    }
+  } else {
+    // The isolate failed to spawn.
+    ASSERT(result.IsString());
+    ServiceEvent spawn_event(NULL, ServiceEvent::kIsolateSpawn);
+    spawn_event.set_spawn_token(&token);
+    spawn_event.set_spawn_error(&String::Cast(result));
+    Service::HandleEvent(&spawn_event);
+  }
+
+  return Object::null();
+}
+
 }  // namespace dart