[heap] Separate scavenger functionality into own file.

src/heap/heap-inl.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_HEAP_INL_H_
 #define V8_HEAP_HEAP_INL_H_
 
 #include <cmath>
 
 #include "src/base/platform/platform.h"
 #include "src/counters.h"
 #include "src/heap/heap.h"
 #include "src/heap/incremental-marking-inl.h"
+#include "src/heap/objects-visiting.h"
 #include "src/heap/spaces-inl.h"
 #include "src/heap/store-buffer.h"
 #include "src/heap/store-buffer-inl.h"
 #include "src/heap-profiler.h"
 #include "src/isolate.h"
 #include "src/list-inl.h"
 #include "src/log.h"
 #include "src/msan.h"
 #include "src/objects-inl.h"
 
@@ skipping 429 matching lines @@
 
     while (src_slot != end_slot) {
       *dst_slot++ = *src_slot++;
     }
   } else {
     MemMove(dst, src, static_cast<size_t>(byte_size));
   }
 }
 
 
-void Heap::ScavengePointer(HeapObject** p) { ScavengeObject(p, *p); }
-
-
 AllocationMemento* Heap::FindAllocationMemento(HeapObject* object) {
   // Check if there is potentially a memento behind the object. If
   // the last word of the memento is on another page we return
   // immediately.
   Address object_address = object->address();
   Address memento_address = object_address + object->Size();
   Address last_memento_word_address = memento_address + kPointerSize;
   if (!NewSpacePage::OnSamePage(object_address, last_memento_word_address)) {
     return NULL;
   }
@@ skipping 37 matching lines @@
 
   AllocationMemento* memento = heap->FindAllocationMemento(object);
   if (memento == NULL) return;
 
   if (memento->GetAllocationSite()->IncrementMementoFoundCount()) {
     heap->AddAllocationSiteToScratchpad(memento->GetAllocationSite(), mode);
   }
 }
 
 
-void Heap::ScavengeObject(HeapObject** p, HeapObject* object) {
-  DCHECK(object->GetIsolate()->heap()->InFromSpace(object));
-
-  // We use the first word (where the map pointer usually is) of a heap
-  // object to record the forwarding pointer.  A forwarding pointer can
-  // point to an old space, the code space, or the to space of the new
-  // generation.
-  MapWord first_word = object->map_word();
-
-  // If the first word is a forwarding address, the object has already been
-  // copied.
-  if (first_word.IsForwardingAddress()) {
-    HeapObject* dest = first_word.ToForwardingAddress();
-    DCHECK(object->GetIsolate()->heap()->InFromSpace(*p));
-    *p = dest;
-    return;
-  }
-
-  UpdateAllocationSiteFeedback(object, IGNORE_SCRATCHPAD_SLOT);
-
-  // AllocationMementos are unrooted and shouldn't survive a scavenge
-  DCHECK(object->map() != object->GetHeap()->allocation_memento_map());
-  // Call the slow part of scavenge object.
-  return ScavengeObjectSlow(p, object);
-}
-
-
 bool Heap::CollectGarbage(AllocationSpace space, const char* gc_reason,
                           const v8::GCCallbackFlags callbackFlags) {
   const char* collector_reason = NULL;
   GarbageCollector collector = SelectGarbageCollector(space, &collector_reason);
   return CollectGarbage(collector, gc_reason, collector_reason, callbackFlags);
 }
 
 
 Isolate* Heap::isolate() {
   return reinterpret_cast<Isolate*>(
@@ skipping 211 matching lines @@
 
 void VerifySmisVisitor::VisitPointers(Object** start, Object** end) {
   for (Object** current = start; current < end; current++) {
     CHECK((*current)->IsSmi());
   }
 }
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_HEAP_INL_H_