[heap] Evacuation for young generation

src/heap/mark-compact.h

Index: src/heap/mark-compact.h
diff --git a/src/heap/mark-compact.h b/src/heap/mark-compact.h
index 00620423fa689ef66d541c3ad5dcb6904e418916..9bb51c21a50451d13c9ff24044831656db0ecdeb 100644
--- a/src/heap/mark-compact.h
+++ b/src/heap/mark-compact.h
@@ -424,8 +424,16 @@ enum PageEvacuationMode { NEW_TO_NEW, NEW_TO_OLD };
 
 class MinorMarkCompactCollector {

[Hannes Payer (out of office), 2017/04/21 14:35:18]

Would it make sense to have a higher level abstract MarkCompact collector class
from  from which the two instances inherit and implement the interface?

[Michael Lippautz, 2017/04/24 13:15:08]

Yes, I started implementing that in a smaller CL on the side.

  public:
+  MarkingState marking_state(HeapObject* object) const {
+    return MarkingState::External(object);
+  }
+
+  MarkingState marking_state(MemoryChunk* chunk) const {
+    return MarkingState::External(chunk);
+  }
+
   explicit MinorMarkCompactCollector(Heap* heap)
-      : heap_(heap), marking_deque_(heap) {}
+      : heap_(heap), marking_deque_(heap), page_parallel_job_semaphore_(0) {}
 
   void SetUp();
   void TearDown();
@@ -447,9 +455,19 @@ class MinorMarkCompactCollector {
   void MarkLiveObjects();
   void ProcessMarkingDeque();
   void EmptyMarkingDeque();
+  void ClearNonLiveReferences();
+
+  void EvacuatePrologue();
+  void EvacuateEpilogue();
+  void EvacuateNewSpace(std::vector<HeapObject*>* black_allocation_objects);
+  void EvacuatePagesInParallel(
+      std::vector<HeapObject*>* black_allocation_objects);
+  void UpdatePointersAfterEvacuation();
 
   Heap* heap_;
   MarkingDeque marking_deque_;
+  base::Semaphore page_parallel_job_semaphore_;
+  List<Page*> new_space_evacuation_pages_;
 
   friend class StaticYoungGenerationMarkingVisitor;
 };
@@ -541,6 +559,14 @@ class MarkCompactCollector {
     kClearMarkbits,
   };
 
+  MarkingState marking_state(HeapObject* object) const {
+    return MarkingState::Internal(object);
+  }
+
+  MarkingState marking_state(MemoryChunk* chunk) const {
+    return MarkingState::Internal(chunk);
+  }
+
   static void Initialize();
 
   static SlotCallbackResult CheckAndMarkObject(Heap* heap,
@@ -793,9 +819,6 @@ class MarkCompactCollector {
   void EvacuateEpilogue();
   void EvacuatePagesInParallel();
 
-  // The number of parallel compaction tasks, including the main thread.
-  int NumberOfParallelCompactionTasks(int pages, intptr_t live_bytes);
-
   void EvacuateNewSpaceAndCandidates();
 
   void UpdatePointersAfterEvacuation();