NewGC: Clear scan-on-scavenge flag from pages that

src/store-buffer.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 590 matching lines @@
   // space left on the page we will keep the pointers in the store buffer and
   // remove the flag from the page.
   if (some_pages_to_scan) {
     if (callback_ != NULL) {
       (*callback_)(heap_, NULL, kStoreBufferStartScanningPagesEvent);
     }
     PointerChunkIterator it;
     MemoryChunk* chunk;
     while ((chunk = it.next()) != NULL) {
       if (chunk->scan_on_scavenge()) {
+        chunk->set_scan_on_scavenge(false);
         if (callback_ != NULL) {
           (*callback_)(heap_, chunk, kStoreBufferScanningPageEvent);
         }
         if (chunk->owner() == heap_->lo_space()) {
           LargePage* large_page = reinterpret_cast<LargePage*>(chunk);
           HeapObject* array = large_page->GetObject();
           ASSERT(array->IsFixedArray());
           Address start = array->address();
           Address end = start + array->Size();
           FindPointersToNewSpaceInRegion(start, end, slot_callback);
@@ skipping 66 matching lines @@
 }
 
 
 void StoreBuffer::CheckForFullBuffer() {
   if (old_limit_ - old_top_ < kStoreBufferSize * 2) {
     HandleFullness();
   }
 }
 
 } }  // namespace v8::internal