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

src/heap/spaces.h

 // Copyright 2011 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_SPACES_H_
 #define V8_HEAP_SPACES_H_
 
 #include "src/allocation.h"
 #include "src/atomic-utils.h"
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/base/platform/mutex.h"
 #include "src/flags.h"
 #include "src/hashmap.h"
+#include "src/heap/store-buffer.h"
 #include "src/list.h"
 #include "src/objects.h"
 #include "src/utils.h"
 
 namespace v8 {
 namespace internal {
 
 class CompactionSpaceCollection;
 class Isolate;
 
@@ skipping 2964 matching lines @@
       int size_in_bytes) override;
 };
 
 
 // A collection of |CompactionSpace|s used by a single compaction task.
 class CompactionSpaceCollection : public Malloced {
  public:
   explicit CompactionSpaceCollection(Heap* heap)
       : old_space_(heap, OLD_SPACE, Executability::NOT_EXECUTABLE),
         code_space_(heap, CODE_SPACE, Executability::EXECUTABLE),
+        local_pretenuring_feedback_(HashMap::PointersMatch,
+                                    kInitialLocalPretenuringFeedbackCapacity),
         duration_(0.0),
         bytes_compacted_(0) {}
 
   CompactionSpace* Get(AllocationSpace space) {
     switch (space) {
       case OLD_SPACE:
         return &old_space_;
       case CODE_SPACE:
         return &code_space_;
       default:
         UNREACHABLE();
     }
     UNREACHABLE();
     return nullptr;
   }
 
   void ReportCompactionProgress(double duration, intptr_t bytes_compacted) {
     duration_ += duration;
     bytes_compacted_ += bytes_compacted;
   }
 
   double duration() const { return duration_; }
   intptr_t bytes_compacted() const { return bytes_compacted_; }
+  HashMap* local_pretenuring_feedback() { return &local_pretenuring_feedback_; }
+  LocalStoreBuffer* local_store_buffer() { return &local_store_buffer_; }
 
  private:
+  static const int kInitialLocalPretenuringFeedbackCapacity = 256;
+
   CompactionSpace old_space_;
   CompactionSpace code_space_;
+  HashMap local_pretenuring_feedback_;
+  LocalStoreBuffer local_store_buffer_;
 
   // Book keeping.
   double duration_;
   intptr_t bytes_compacted_;
 };
 
 
 // -----------------------------------------------------------------------------
 // Old object space (includes the old space of objects and code space)
 
@@ skipping 184 matching lines @@
     count = 0;
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_SPACES_H_