Track live instance and allocation counts for classes

runtime/vm/heap.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_HEAP_H_
 #define VM_HEAP_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/flags.h"
@@ skipping 147 matching lines @@
 
   // Verify that all pointers in the heap point to the heap.
   bool Verify() const;
 
   // Print heap sizes.
   void PrintSizes() const;
 
   // Return amount of memory used and capacity in a space.
   intptr_t UsedInWords(Space space) const;
   intptr_t CapacityInWords(Space space) const;
-
+  // Return the amount of GCing in microseconds.
+  int64_t GCTimeInMicros(Space space) const;
+  double GCTimeInSeconds(Space space) const;

[Ivan Posva, 2014/01/17 06:53:16]

Why do you need both? Micros and Seconds?

[Cutch, 2014/01/17 18:37:59]

Removed Seconds.

+  intptr_t Collections(Space space) const;
   // Returns the [lowest, highest) addresses in the heap.
   void StartEndAddress(uword* start, uword* end) const;
 
   ObjectSet* CreateAllocatedObjectSet() const;
 
   // Generates a profile of the current and VM isolate heaps.
   void Profile(Dart_FileWriteCallback callback, void* stream) const;
   void ProfileToFile(const char* reason) const;
 
   static const char* GCReasonToString(GCReason gc_reason);
@@ skipping 92 matching lines @@
   Heap();
 
   uword AllocateNew(intptr_t size);
   uword AllocateOld(intptr_t size, HeapPage::PageType type);
 
   // GC stats collection.
   void RecordBeforeGC(Space space, GCReason reason);
   void RecordAfterGC();
   void PrintStats();
   void UpdateObjectHistogram();
+  void UpdateClassHeapStatsBeforeGC(Heap::Space space);
 
   // The different spaces used for allocation.
   Scavenger* new_space_;
   PageSpace* old_space_;
 
   WeakTable* new_weak_tables_[kNumWeakSelectors];
   WeakTable* old_weak_tables_[kNumWeakSelectors];
 
   // GC stats collection.
   GCStats stats_;
@@ skipping 32 matching lines @@
   NoHeapGrowthControlScope();
   ~NoHeapGrowthControlScope();
  private:
   bool current_growth_controller_state_;
   DISALLOW_COPY_AND_ASSIGN(NoHeapGrowthControlScope);
 };
 
 }  // namespace dart
 
 #endif  // VM_HEAP_H_