Concurrent/parallel precise sweeping.

src/mark-compact.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_MARK_COMPACT_H_
 #define V8_MARK_COMPACT_H_
 
 #include "src/compiler-intrinsics.h"
 #include "src/spaces.h"
 
@@ skipping 554 matching lines @@
   inline Heap* heap() const { return heap_; }
   inline Isolate* isolate() const;
 
   CodeFlusher* code_flusher() { return code_flusher_; }
   inline bool is_code_flushing_enabled() const { return code_flusher_ != NULL; }
   void EnableCodeFlushing(bool enable);
 
   enum SweeperType {
     PARALLEL_CONSERVATIVE,
     CONCURRENT_CONSERVATIVE,
+    PARALLEL_PRECISE,
+    CONCURRENT_PRECISE,
     PRECISE
   };
 
   enum SweepingParallelism {
     SWEEP_ON_MAIN_THREAD,
     SWEEP_IN_PARALLEL
   };
 
 #ifdef VERIFY_HEAP
   void VerifyMarkbitsAreClean();
   static void VerifyMarkbitsAreClean(PagedSpace* space);
   static void VerifyMarkbitsAreClean(NewSpace* space);
   void VerifyWeakEmbeddedObjectsInCode();
   void VerifyOmittedMapChecks();
 #endif
 
   // Sweep a single page from the given space conservatively.
   // Returns the size of the biggest continuous freed memory chunk in bytes.
   template<SweepingParallelism type>
-  static intptr_t SweepConservatively(PagedSpace* space,
+  static int SweepConservatively(PagedSpace* space,
                                       FreeList* free_list,
                                       Page* p);
 
   INLINE(static bool ShouldSkipEvacuationSlotRecording(Object** anchor)) {
     return Page::FromAddress(reinterpret_cast<Address>(anchor))->
         ShouldSkipEvacuationSlotRecording();
   }
 
   INLINE(static bool ShouldSkipEvacuationSlotRecording(Object* host)) {
     return Page::FromAddress(reinterpret_cast<Address>(host))->
@@ skipping 380 matching lines @@
  private:
   MarkCompactCollector* collector_;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_