VM Service isolate listing

runtime/vm/service.cc

+// 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.
+
+#include "vm/isolate.h"
+#include "vm/message.h"
+#include "vm/object.h"
+#include "vm/port.h"
+#include "vm/service.h"
+
+namespace dart {
+
+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);
+}
+
+
+static void PostReply(const String& reply, Dart_Port reply_port) {
+  uint8_t* data = NULL;
+  MessageWriter writer(&data, &allocator);
+  writer.WriteMessage(reply);
+  PortMap::PostMessage(new Message(reply_port, Message::kIllegalPort, data,
+                                   writer.BytesWritten(),
+                                   Message::kNormalPriority));
+}
+
+
+static RawString* HandleIdMessage(Isolate* isolate, Dart_Port reply_port) {
+  TextBuffer buffer(256);
+  buffer.Printf("{ \"id\": \"%s\" }", isolate->name());
+  return String::New(buffer.buf());
+}
+
+
+void Service::HandleServiceMessage(Isolate* isolate, Dart_Port reply_port,
+                                   const Instance& message) {
+  ASSERT(isolate != NULL);
+  ASSERT(reply_port != ILLEGAL_PORT);
+  ASSERT(!message.IsNull());
+  ASSERT(message.IsString());
+
+  String& reply = String::Handle();
+
+  // For now, assume service message is always an id check.
+  reply = HandleIdMessage(isolate, reply_port);
+
+  ASSERT(!reply.IsNull());
+
+  PostReply(reply, reply_port);
+}
+
+}  // namespace dart