Record slots in large objects.

src/heap/mark-compact.cc

 // 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.
 
 #include "src/heap/mark-compact.h"
 
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
@@ skipping 3618 matching lines @@
   }
 
   {
     GCTracer::Scope gc_scope(heap()->tracer(),
                              GCTracer::Scope::MC_UPDATE_POINTERS_TO_EVACUATED);
     SlotsBuffer::UpdateSlotsRecordedIn(heap_, migration_slots_buffer_);
     if (FLAG_trace_fragmentation_verbose) {
       PrintF("  migration slots buffer: %d\n",
              SlotsBuffer::SizeOfChain(migration_slots_buffer_));
     }
-
-    if (compacting_ && was_marked_incrementally_) {
-      GCTracer::Scope gc_scope(heap()->tracer(),
-                               GCTracer::Scope::MC_RESCAN_LARGE_OBJECTS);
-      // It's difficult to filter out slots recorded for large objects.
-      LargeObjectIterator it(heap_->lo_space());
-      for (HeapObject* obj = it.Next(); obj != NULL; obj = it.Next()) {
-        // LargeObjectSpace is not swept yet thus we have to skip
-        // dead objects explicitly.
-        if (!IsMarked(obj)) continue;
-
-        Page* p = Page::FromAddress(obj->address());
-        if (p->IsFlagSet(Page::RESCAN_ON_EVACUATION)) {
-          obj->Iterate(&updating_visitor);
-          p->ClearFlag(Page::RESCAN_ON_EVACUATION);
-        }
-      }
-    }
   }
 
   int npages = evacuation_candidates_.length();
   {
     GCTracer::Scope gc_scope(
         heap()->tracer(),
         GCTracer::Scope::MC_UPDATE_POINTERS_BETWEEN_EVACUATED);
     for (int i = 0; i < npages; i++) {
       Page* p = evacuation_candidates_[i];
       DCHECK(p->IsEvacuationCandidate() ||
@@ skipping 1046 matching lines @@
   SlotsBuffer* buffer = *buffer_address;
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 }  // namespace internal
 }  // namespace v8