Do inline object filtering (via page flags) before call to RecordWriteStub.

src/spaces-inl.h

Index: src/spaces-inl.h
diff --git a/src/spaces-inl.h b/src/spaces-inl.h
index bcb6e63ad70af630d4e77e34c806fb3f8754dcdb..31e0cbee9f1bef887a123df3d5bea323c45387da 100644
--- a/src/spaces-inl.h
+++ b/src/spaces-inl.h
@@ -127,6 +127,9 @@ Page* Page::Initialize(Heap* heap,
   owner->IncreaseCapacity(Page::kObjectAreaSize);
   owner->Free(page->ObjectAreaStart(),
               page->ObjectAreaEnd() - page->ObjectAreaStart());
+
+  heap->incremental_marking()->SetOldSpacePageFlags(chunk);
+
   return page;
 }
 
@@ -140,11 +143,13 @@ bool PagedSpace::Contains(Address addr) {
 
 void MemoryChunk::set_scan_on_scavenge(bool scan) {
   if (scan) {
-    if (!scan_on_scavenge_) heap_->increment_scan_on_scavenge_pages();
+    if (!scan_on_scavenge()) heap_->increment_scan_on_scavenge_pages();
+    SetFlag(SCAN_ON_SCAVENGE);
   } else {
-    if (scan_on_scavenge_) heap_->decrement_scan_on_scavenge_pages();
+    if (scan_on_scavenge()) heap_->decrement_scan_on_scavenge_pages();
+    ClearFlag(SCAN_ON_SCAVENGE);
   }
-  scan_on_scavenge_ = scan;
+  heap_->incremental_marking()->SetOldSpacePageFlags(this);
 }
 
 
@@ -269,6 +274,13 @@ MaybeObject* NewSpace::AllocateRawInternal(int size_in_bytes) {
 }
 
 
+LargePage* LargePage::Initialize(Heap* heap, MemoryChunk* chunk) {
+  // TODO(gc) ISOLATESMERGE initialize chunk to point to heap?

[Erik Corry, 2011/05/11 18:53:57]

I don't see how we can defer this to a TODO.  We have GetHeap that works on any
HeapObject.  This will fail if we get a large object.

[Vyacheslav Egorov (Chromium), 2011/05/13 11:06:52]

Done.

+  heap->incremental_marking()->SetOldSpacePageFlags(chunk);
+  return static_cast<LargePage*>(chunk);
+}
+
+
 intptr_t LargeObjectSpace::Available() {
   return ObjectSizeFor(heap()->isolate()->memory_allocator()->Available());
 }