Initial prototype of vmstats support, based on Dart VM Stats draft design doc.

runtime/bin/vmstats.h

Index: runtime/bin/vmstats.h
===================================================================
--- runtime/bin/vmstats.h	(revision 0)
+++ runtime/bin/vmstats.h	(revision 0)
@@ -0,0 +1,51 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file

[siva, 2013/02/09 01:00:57]

2013

[Tom Ball, 2013/02/14 23:45:16]

Done.

+// 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_H_
+#define BIN_VMSTATS_H_
+
+#include <map>
+#include <sstream>
+#include <string>
+
+#include "bin/isolate_data.h"
+#include "include/dart_debugger_api.h"
+
+namespace dart {
+
+// VmStats is a HTTP singleton service that reports status information
+// of the running VM.
+
+class VmStats {
+ public:
+  static void Start(int port);
+  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);
+
+ private:
+  VmStats() {}
+
+  // Initial server thread function.
+  static void WebServer(uword server_socket);
+
+  // Status text generators.
+  void MemoryUsed(std::ostringstream* stream);
+
+  typedef std::map<IsolateData*, Dart_Isolate> IsolateTable;
+
+  std::string root_directory_;
+  IsolateTable isolate_table_;
+
+  static VmStats* instance_;
+
+  // Disallow copy constructor.
+  DISALLOW_COPY_AND_ASSIGN(VmStats);
+};
+
+}  // namespace dart
+
+#endif  // BIN_VMSTATS_H_