Add GC stats to GC timeline events

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"
 #include "vm/globals.h"
 #include "vm/pages.h"
 #include "vm/scavenger.h"
 #include "vm/spaces.h"
 #include "vm/verifier.h"
 #include "vm/weak_table.h"
 
 namespace dart {
 
 // Forward declarations.
 class Isolate;
 class ObjectPointerVisitor;
 class ObjectSet;
 class ServiceEvent;
+class TimelineEventScope;
 class VirtualMemory;
 
 class Heap {
  public:
   enum Space {
     kNew,
     kOld,
     kCode,
     // TODO(koda): Harmonize all old-space allocation and get rid of this.
     kPretenured,
@@ skipping 285 matching lines @@
       Thread* thread, ApiCallbacks api_callbacks, GCReason reason);
   void CollectOldSpaceGarbage(
       Thread* thread, ApiCallbacks api_callbacks, GCReason reason);
 
   // GC stats collection.
   void RecordBeforeGC(Space space, GCReason reason);
   void RecordAfterGC(Space space);
   void PrintStats();
   void UpdateClassHeapStatsBeforeGC(Heap::Space space);
   void UpdatePretenurePolicy();
+  void PrintStatsToTimeline(TimelineEventScope* event);
 
   // Updates gc in progress flags.
   bool BeginNewSpaceGC(Thread* thread);
   void EndNewSpaceGC();
   bool BeginOldSpaceGC(Thread* thread);
   void EndOldSpaceGC();
 
   // If this heap is non-empty, updates start and end to the smallest range that
   // contains both the original [start, end) and the [lowest, highest) addresses
   // of this heap.
@@ skipping 55 matching lines @@
 // Note: During this scope, the code pages are non-executable.
 class WritableVMIsolateScope : StackResource {
  public:
   explicit WritableVMIsolateScope(Thread* thread);
   ~WritableVMIsolateScope();
 };
 
 }  // namespace dart
 
 #endif  // VM_HEAP_H_