Switch UnreachableObjectsFilter to use Marking instead of InstrusiveMarking.

src/mark-compact.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 312 matching lines @@
 
   LargeObjectIterator it(heap_->lo_space());
   for (HeapObject* obj = it.Next(); obj != NULL; obj = it.Next()) {
     MarkBit mark_bit = Marking::MarkBitFrom(obj);
     ASSERT(Marking::IsWhite(mark_bit));
   }
 }
 #endif
 
 
-static void ClearMarkbits(PagedSpace* space) {
+static void ClearMarkbitsInPagedSpace(PagedSpace* space) {
   PageIterator it(space);
 
   while (it.has_next()) {
     Bitmap::Clear(it.next());
   }
 }
 
 
-static void ClearMarkbits(NewSpace* space) {
+static void ClearMarkbitsInNewSpace(NewSpace* space) {
   NewSpacePageIterator it(space->ToSpaceStart(), space->ToSpaceEnd());
 
   while (it.has_next()) {
     Bitmap::Clear(it.next());
   }
 }
 
 
-static void ClearMarkbits(Heap* heap) {
-  ClearMarkbits(heap->code_space());
-  ClearMarkbits(heap->map_space());
-  ClearMarkbits(heap->old_pointer_space());
-  ClearMarkbits(heap->old_data_space());
-  ClearMarkbits(heap->cell_space());
-  ClearMarkbits(heap->new_space());
+void MarkCompactCollector::ClearMarkbits() {
+  ClearMarkbitsInPagedSpace(heap_->code_space());
+  ClearMarkbitsInPagedSpace(heap_->map_space());
+  ClearMarkbitsInPagedSpace(heap_->old_pointer_space());
+  ClearMarkbitsInPagedSpace(heap_->old_data_space());
+  ClearMarkbitsInPagedSpace(heap_->cell_space());
+  ClearMarkbitsInNewSpace(heap_->new_space());
 
-  LargeObjectIterator it(heap->lo_space());
+  LargeObjectIterator it(heap_->lo_space());
   for (HeapObject* obj = it.Next(); obj != NULL; obj = it.Next()) {
     MarkBit mark_bit = Marking::MarkBitFrom(obj);
     mark_bit.Clear();
     mark_bit.Next().Clear();
   }
 }
 
 
 bool Marking::TransferMark(Address old_start, Address new_start) {
   // This is only used when resizing an object.
@@ skipping 127 matching lines @@
 #ifdef ENABLE_GDB_JIT_INTERFACE
   if (FLAG_gdbjit) {
     // If GDBJIT interface is active disable compaction.
     compacting_collection_ = false;
   }
 #endif
 
   // Clear marking bits for precise sweeping to collect all garbage.
   if (was_marked_incrementally_ && PreciseSweepingRequired()) {
     heap()->incremental_marking()->Abort();
-    ClearMarkbits(heap_);
+    ClearMarkbits();
     AbortCompaction();
     was_marked_incrementally_ = false;
   }
 
   // Don't start compaction if we are in the middle of incremental
   // marking cycle. We did not collect any slots.
   if (!FLAG_never_compact && !was_marked_incrementally_) {
     StartCompaction();
   }
 
@@ skipping 3305 matching lines @@
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 
 
 } }  // namespace v8::internal