Added ctrl-\ support in dart binary to dump isolate stacks.

runtime/bin/vmstats_impl.h

 // 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.
 
 #ifndef BIN_VMSTATS_IMPL_H_
 #define BIN_VMSTATS_IMPL_H_
 
 #include "bin/vmstats.h"
 
 #include <map>
 
 #include "bin/isolate_data.h"
 #include "platform/thread.h"
 
 // VmStats is a HTTP singleton service that reports status information
 // of the running VM.
 
 class VmStats {
  public:
-  static void Start(int port, const char* root_dir);
+  static void Initialize();
+
+  static void Start(int port, const char* root_dir, bool verbose);
   static void Stop();
 
   // Add and remove functions for the isolate_table, called by main.cc.
   static void AddIsolate(IsolateData* isolate_data, Dart_Isolate isolate);
   static void RemoveIsolate(IsolateData* isolate_data);
 
+  // Print stack traces of current isolates to stdout.
+  static void DumpStack();
+
  private:
-  VmStats() : root_directory_(NULL), running_(false), bind_address_(0) {}
+  explicit VmStats(bool verbose) :
+      root_directory_(NULL), running_(false), bind_address_(0) {
+    verbose_ = verbose;
+  }
 
+  static void StartServer(int port, const char* root_dir);
   static void WebServer(uword bind_address);
   static void Shutdown();
+  static void DumpStackThread(uword unused);
 
   // Status text generators.
   char* IsolatesStatus();
 
   typedef std::map<IsolateData*, Dart_Isolate> IsolateTable;
 
   const char* root_directory_;
   IsolateTable isolate_table_;
   bool running_;
   int64_t bind_address_;
+  bool verbose_;
 
   static VmStats* instance_;
   static dart::Monitor* instance_monitor_;
 
   // Disallow copy constructor.
   DISALLOW_COPY_AND_ASSIGN(VmStats);
 };
 
 
 // Status plug-in and linked-list node.
@@ skipping 36 matching lines @@
 
   static VmStatusService* instance_;
   static dart::Mutex* mutex_;
 
   VmStatusPlugin* registered_plugin_list_;
 
   DISALLOW_COPY_AND_ASSIGN(VmStatusService);
 };
 
 #endif  // BIN_VMSTATS_IMPL_H_