Give isolates names to be used during debugging.

runtime/vm/isolate.h

 // 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.
 
 #ifndef VM_ISOLATE_H_
 #define VM_ISOLATE_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/store_buffer.h"
@@ skipping 21 matching lines @@
 class Zone;
 
 class Isolate {
  public:
   ~Isolate();
 
   static inline Isolate* Current();
   static void SetCurrent(Isolate* isolate);
 
   static void InitOnce();
-  static Isolate* Init();
+  static Isolate* Init(const char* name_prefix);
   void Shutdown();
 
   // Visit all object pointers.
   void VisitObjectPointers(ObjectPointerVisitor* visitor, bool validate_frames);
 
   void VisitWeakPersistentHandles(HandleVisitor* visitor);
 
   StoreBufferBlock* store_buffer() { return &store_buffer_; }
 
   Dart_PostMessageCallback post_message_callback() const {
     return post_message_callback_;
   }
   void set_post_message_callback(Dart_PostMessageCallback value) {
     post_message_callback_ = value;
   }
 
   Dart_ClosePortCallback close_port_callback() const {
     return close_port_callback_;
   }
   void set_close_port_callback(Dart_ClosePortCallback value) {
     close_port_callback_ = value;
   }
 
   MessageQueue* message_queue() const { return message_queue_; }
   void set_message_queue(MessageQueue* value) { message_queue_ = value; }
 
+  const char* name() const { return name_; }
+
   // The number of ports is only correct when read from the current
   // isolate. This value is not protected from being updated
   // concurrently.
   intptr_t num_ports() const { return num_ports_; }
   void increment_num_ports() {
     ASSERT(this == Isolate::Current());
     num_ports_++;
   }
   void decrement_num_ports() {
     ASSERT(this == Isolate::Current());
@@ skipping 175 matching lines @@
 
   static void SetCreateCallback(Dart_IsolateCreateCallback cback);
   static Dart_IsolateCreateCallback CreateCallback();
 
   static void SetInterruptCallback(Dart_IsolateInterruptCallback cback);
   static Dart_IsolateInterruptCallback InterruptCallback();
 
  private:
   Isolate();
 
+  void BuildName(const char* name_prefix);
   void PrintInvokedFunctions();
 
   static uword GetSpecifiedStackSize();
 
   static const uword kStackSizeBuffer = (128 * KB);
   static const uword kDefaultStackSize = (1 * MB);
 
   StoreBufferBlock store_buffer_;
   MessageQueue* message_queue_;
   Dart_PostMessageCallback post_message_callback_;
   Dart_ClosePortCallback close_port_callback_;
+  char* name_;
   intptr_t num_ports_;
   intptr_t live_ports_;
   Dart_Port main_port_;
   Heap* heap_;
   ObjectStore* object_store_;
   StackResource* top_resource_;
   RawContext* top_context_;
   Zone* current_zone_;
 #if defined(DEBUG)
   int32_t no_gc_scope_depth_;
@@ skipping 28 matching lines @@
 #include "vm/isolate_linux.h"
 #elif defined(TARGET_OS_MACOS)
 #include "vm/isolate_macos.h"
 #elif defined(TARGET_OS_WINDOWS)
 #include "vm/isolate_win.h"
 #else
 #error Unknown target os.
 #endif
 
 #endif  // VM_ISOLATE_H_