[heap] Parallel newspace evacuation, semispace copy, and compaction \o/

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 cfb2d9d27022f033341acce33c68212faa8ac31a..81b62161d64510d260261970bcdf8b5b0b3677ac 100644
--- a/src/heap/mark-compact.h
+++ b/src/heap/mark-compact.h
@@ -406,7 +406,8 @@ class MarkCompactCollector {
 
   void MigrateObject(HeapObject* dst, HeapObject* src, int size,
                      AllocationSpace to_old_space,
-                     SlotsBuffer** evacuation_slots_buffer);
+                     SlotsBuffer** evacuation_slots_buffer,
+                     LocalStoreBuffer* local_store_buffer);
 
   void InvalidateCode(Code* code);
 
@@ -421,7 +422,8 @@ class MarkCompactCollector {
   // required_freed_bytes was freed. If required_freed_bytes was set to zero
   // then the whole given space is swept. It returns the size of the maximum
   // continuous freed memory chunk.
-  int SweepInParallel(PagedSpace* space, int required_freed_bytes);
+  int SweepInParallel(PagedSpace* space, int required_freed_bytes,
+                      int max_pages = 0);
 
   // Sweeps a given page concurrently to the sweeper threads. It returns the
   // size of the maximum continuous freed memory chunk.
@@ -511,8 +513,6 @@ class MarkCompactCollector {
   class HeapObjectVisitor;
   class SweeperTask;
 
-  static const int kInitialLocalPretenuringFeedbackCapacity = 256;
-
   explicit MarkCompactCollector(Heap* heap);
 
   bool WillBeDeoptimized(Code* code);
@@ -699,20 +699,19 @@ class MarkCompactCollector {
   void SweepSpaces();
 
   void EvacuateNewSpacePrologue();
-
-  // Returns local pretenuring feedback.
-  HashMap* EvacuateNewSpaceInParallel();
+  void EvacuateNewSpaceEpilogue();
 
   void AddEvacuationSlotsBufferSynchronized(
       SlotsBuffer* evacuation_slots_buffer);
 
+  bool EvacuateSinglePage(MemoryChunk* p, HeapObjectVisitor* visitor,
+                          CompactionSpaceCollection* compaction_spaces);
   void EvacuatePages(CompactionSpaceCollection* compaction_spaces,
                      SlotsBuffer** evacuation_slots_buffer);
-
   void EvacuatePagesInParallel();
 
   // The number of parallel compaction tasks, including the main thread.
-  int NumberOfParallelCompactionTasks();
+  int NumberOfParallelCompactionTasks(int pages, intptr_t live_bytes);
 
 
   void StartParallelCompaction(CompactionSpaceCollection** compaction_spaces,
@@ -752,7 +751,8 @@ class MarkCompactCollector {
 
   // Updates store buffer and slot buffer for a pointer in a migrating object.
   void RecordMigratedSlot(Object* value, Address slot,
-                          SlotsBuffer** evacuation_slots_buffer);
+                          SlotsBuffer** evacuation_slots_buffer,
+                          LocalStoreBuffer* local_store_buffer);
 
   // Adds the code entry slot to the slots buffer.
   void RecordMigratedCodeEntrySlot(Address code_entry, Address code_entry_slot,
@@ -778,8 +778,7 @@ class MarkCompactCollector {
   bool have_code_to_deoptimize_;
 
   List<Page*> evacuation_candidates_;
-
-  List<MemoryChunk*> newspace_evacuation_candidates_;
+  List<NewSpacePage*> newspace_evacuation_candidates_;
 
   // The evacuation_slots_buffers_ are used by the compaction threads.
   // When a compaction task finishes, it uses