Implement list isolates command

runtime/bin/dbg_connection.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 "bin/dbg_connection.h"
 #include "bin/dbg_message.h"
 #include "bin/dartutils.h"
 #include "bin/log.h"
 #include "bin/socket.h"
 #include "bin/thread.h"
@@ skipping 162 matching lines @@
 
 struct JSONDebuggerCommand {
   const char* cmd_string;
   CommandHandler handler_function;
 };
 
 
 void DebuggerConnectionHandler::HandleMessages() {
   static JSONDebuggerCommand generic_debugger_commands[] = {
     { "interrupt", HandleInterruptCmd },
-    { "isolates", HandleIsolatesListCmd },
+    { "getIsolateIds", HandleIsolatesListCmd },
     { NULL, NULL }
   };
 
   for (;;) {
     // Read a message.
     while (!msgbuf_->IsValidMessage() && msgbuf_->Alive()) {
       msgbuf_->ReadData();
     }
     if (!msgbuf_->Alive()) {
       return;
@@ skipping 203 matching lines @@
   dart::TextBuffer msg(64);
   msg.Printf("{ \"id\": %d }", msg_id);
   in_msg->SendReply(&msg);
 }
 
 
 void DebuggerConnectionHandler::HandleIsolatesListCmd(DbgMessage* in_msg) {
   MessageParser msg_parser(in_msg->buffer(), in_msg->buffer_len());
   int msg_id = msg_parser.MessageId();
   ASSERT(msg_id >= 0);
-  in_msg->SendErrorReply(msg_id, "isolate list command unimplemented");
+  dart::TextBuffer msg(64);
+  msg.Printf("{ \"id\": %d, \"result\": { \"isolateIds\": [", msg_id);
+  DbgMsgQueueList::ListIsolateIds(&msg);
+  msg.Printf("]}}");
+  in_msg->SendReply(&msg);
 }
 
 
 void DebuggerConnectionHandler::AddNewDebuggerConnection(int debug_fd) {
   // TODO(asiva): Support multiple debugger connections, for now we just
   // create one handler, store it in a static variable and use it.
   ASSERT(singleton_handler == NULL);
   singleton_handler = new DebuggerConnectionHandler(debug_fd);
 }
 
@@ skipping 13 matching lines @@
   ASSERT(singleton_handler != NULL);
   return singleton_handler;
 }
 
 
 bool DebuggerConnectionHandler::IsConnected() {
   // TODO(asiva): Support multiple debugger connections.
   // Return true if a connection has been established.
   return singleton_handler != NULL;
 }