Refactor Isolate name format, storage and log

runtime/vm/message_handler.cc

 // Copyright (c) 2011, 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/message_handler.h"
 
 #include "vm/dart.h"
 #include "vm/lockers.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
@@ skipping 107 matching lines @@
   task_running = pool_->Run(task_);
   ASSERT(task_running);
 }
 
 void MessageHandler::PostMessage(Message* message, bool before_events) {
   Message::Priority saved_priority;
   bool task_running = true;
   {
     MonitorLocker ml(&monitor_);
     if (FLAG_trace_isolates) {
-      const char* source_name = "<native code>";
       Isolate* source_isolate = Isolate::Current();
       if (source_isolate) {
-        source_name = source_isolate->name();
+        OS::Print(
+            "[>] Posting message:\n"
+            "\tlen:        %" Pd "\n\tsource:     (%" Pd64
+            ") %s\n\tdest:       %s\n"
+            "\tdest_port:  %" Pd64 "\n",
+            message->len(), static_cast<int64_t>(source_isolate->main_port()),
+            source_isolate->name(), name(), message->dest_port());
+      } else {
+        OS::Print(
+            "[>] Posting message:\n"
+            "\tlen:        %" Pd
+            "\n\tsource:     <native code>\n"
+            "\tdest:       %s\n"
+            "\tdest_port:  %" Pd64 "\n",
+            message->len(), name(), message->dest_port());
       }
-      OS::Print(
-          "[>] Posting message:\n"
-          "\tlen:        %" Pd
-          "\n"
-          "\tsource:     %s\n"
-          "\tdest:       %s\n"
-          "\tdest_port:  %" Pd64 "\n",
-          message->len(), source_name, name(), message->dest_port());
     }
 
     saved_priority = message->priority();
     if (message->IsOOB()) {
       oob_queue_->Enqueue(message, before_events);
     } else {
       queue_->Enqueue(message, before_events);
     }
     message = NULL;  // Do not access message.  May have been deleted.
 
@@ skipping 414 matching lines @@
   ASSERT(handler != NULL);
   handler_->oob_message_handling_allowed_ = false;
 }
 
 MessageHandler::AcquiredQueues::~AcquiredQueues() {
   ASSERT(handler_ != NULL);
   handler_->oob_message_handling_allowed_ = true;
 }
 
 }  // namespace dart