[heap] inline allocation steps refactor

src/heap/incremental-marking.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_INCREMENTAL_MARKING_H_
 #define V8_HEAP_INCREMENTAL_MARKING_H_
 
 #include "src/cancelable-task.h"
 #include "src/execution.h"
 #include "src/heap/incremental-marking-job.h"
+#include "src/heap/spaces.h"
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class MarkBit;
 class PagedSpace;
 
 class IncrementalMarking {
@@ skipping 186 matching lines @@
 
   INLINE(static void MarkObject(Heap* heap, HeapObject* object));
 
   Heap* heap() const { return heap_; }
 
   IncrementalMarkingJob* incremental_marking_job() {
     return &incremental_marking_job_;
   }
 
  private:
+  class Observer : public InlineAllocationObserver {
+   public:
+    Observer(IncrementalMarking& incremental_marking, intptr_t step_size)
+        : InlineAllocationObserver(step_size),
+          incremental_marking_(incremental_marking) {}
+
+    virtual void Step(int bytes_allocated) {
+      incremental_marking_.Step(bytes_allocated,
+                                IncrementalMarking::GC_VIA_STACK_GUARD);
+    }
+
+   private:
+    IncrementalMarking& incremental_marking_;
+  };
+
   int64_t SpaceLeftInOldSpace();
 
   void SpeedUp();
 
   void ResetStepCounters();
 
   void StartMarking();
 
   void MarkRoots();
   void MarkObjectGroups();
@@ skipping 14 matching lines @@
   INLINE(void ProcessMarkingDeque());
 
   INLINE(intptr_t ProcessMarkingDeque(intptr_t bytes_to_process));
 
   INLINE(void VisitObject(Map* map, HeapObject* obj, int size));
 
   void IncrementIdleMarkingDelayCounter();
 
   Heap* heap_;
 
+  Observer observer_;
+
   State state_;
   bool is_compacting_;
 
   int steps_count_;
   int64_t old_generation_space_available_at_start_of_incremental_;
   int64_t old_generation_space_used_at_start_of_incremental_;
   int64_t bytes_rescanned_;
   bool should_hurry_;
   int marking_speed_;
   intptr_t bytes_scanned_;
@@ skipping 14 matching lines @@
   GCRequestType request_type_;
 
   IncrementalMarkingJob incremental_marking_job_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IncrementalMarking);
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_INCREMENTAL_MARKING_H_