Track live instance and allocation counts for classes

runtime/vm/isolate.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 VM_ISOLATE_H_
 #define VM_ISOLATE_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/thread.h"
@@ skipping 13 matching lines @@
 class Array;
 class Class;
 class CodeIndexTable;
 class Debugger;
 class DeoptContext;
 class Field;
 class Function;
 class HandleScope;
 class HandleVisitor;
 class Heap;
+class HeapClassStatistics;
 class ICData;
 class Instance;
 class LongJump;
 class MessageHandler;
 class Mutex;
 class Object;
 class ObjectPointerVisitor;
 class ObjectStore;
 class RawInstance;
 class RawArray;
@@ skipping 292 matching lines @@
     return file_close_callback_;
   }
 
   void set_object_id_ring(ObjectIdRing* ring) {
     object_id_ring_ = ring;
   }
   ObjectIdRing* object_id_ring() {
     return object_id_ring_;
   }
 
+  HeapClassStatistics* heap_class_stats() {
+    return heap_class_stats_;
+  }
+
   DeoptContext* deopt_context() const { return deopt_context_; }
   void set_deopt_context(DeoptContext* value) {
     ASSERT(value == NULL || deopt_context_ == NULL);
     deopt_context_ = value;
   }
 
   static char* GetStatus(const char* request);
 
   intptr_t BlockClassFinalization() {
     ASSERT(defer_finalization_count_ >= 0);
@@ skipping 58 matching lines @@
   DeoptContext* deopt_context_;
 
   // Status support.
   char* stacktrace_;
   intptr_t stack_frame_index_;
   ObjectHistogram* object_histogram_;
 
   // Ring buffer of objects assigned an id.
   ObjectIdRing* object_id_ring_;
 
+  // Heap statistics by class id
+  HeapClassStatistics* heap_class_stats_;
+
   // Reusable handles support.
 #define REUSABLE_HANDLE_FIELDS(object)                                         \
   object* object##_handle_;                                                    \
 
   REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_FIELDS)
 #undef REUSABLE_HANDLE_FIELDS
   VMHandles reusable_handles_;
 
   static Dart_IsolateCreateCallback create_callback_;
   static Dart_IsolateInterruptCallback interrupt_callback_;
@@ skipping 97 matching lines @@
   Isolate* isolate_;
   char* script_url_;
   char* library_url_;
   char* function_name_;
   char* exception_callback_name_;
 };
 
 }  // namespace dart
 
 #endif  // VM_ISOLATE_H_