X64: Disabled RSet in 64-bit mode.

src/spaces-inl.h

 // Copyright 2006-2008 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 74 matching lines @@
 }
 
 
 Address Page::AllocationTop() {
   PagedSpace* owner = MemoryAllocator::PageOwner(this);
   return owner->PageAllocationTop(this);
 }
 
 
 void Page::ClearRSet() {
+#ifndef V8_HOST_ARCH_64_BIT
   // This method can be called in all rset states.
   memset(RSetStart(), 0, kRSetEndOffset - kRSetStartOffset);
+#endif
 }
 
 
 // Give an address a (32-bits):
 // | page address | words (6) | bit offset (5) | pointer alignment (2) |
 // The rset address is computed as:
 //    page_address + words * 4
 
 Address Page::ComputeRSetBitPosition(Address address, int offset,
                                      uint32_t* bitmask) {
@@ skipping 80 matching lines @@
 
   ChunkInfo& c = chunks_[chunk_id];
   return (c.address() <= p->address()) &&
          (p->address() < c.address() + c.size()) &&
          (space == c.owner());
 }
 
 
 Page* MemoryAllocator::GetNextPage(Page* p) {
   ASSERT(p->is_valid());
-  int raw_addr = p->opaque_header & ~Page::kPageAlignmentMask;
+  intptr_t raw_addr = p->opaque_header & ~Page::kPageAlignmentMask;
   return Page::FromAddress(AddressFrom<Address>(raw_addr));
 }
 
 
 int MemoryAllocator::GetChunkId(Page* p) {
   ASSERT(p->is_valid());
   return p->opaque_header & Page::kPageAlignmentMask;
 }
 
 
 void MemoryAllocator::SetNextPage(Page* prev, Page* next) {
   ASSERT(prev->is_valid());
-  int chunk_id = prev->opaque_header & Page::kPageAlignmentMask;
+  int chunk_id = GetChunkId(prev);
   ASSERT_PAGE_ALIGNED(next->address());
   prev->opaque_header = OffsetFrom(next->address()) | chunk_id;
 }
 
 
 PagedSpace* MemoryAllocator::PageOwner(Page* page) {
   int chunk_id = GetChunkId(page);
   ASSERT(IsValidChunk(chunk_id));
   return chunks_[chunk_id].owner();
 }
@@ skipping 127 matching lines @@
   ASSERT(space->low() <= alloc_info->top
          && alloc_info->top <= space->high()
          && alloc_info->limit == space->high());
 #endif
   return obj;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_INL_H_