Refactor MemoryAllocator to allow big normal pages

src/frames.cc

 // 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 1098 matching lines @@
 
 Code* PcToCodeCache::GcSafeCastToCode(HeapObject* object, Address pc) {
   Code* code = reinterpret_cast<Code*>(object);
   ASSERT(code != NULL && code->contains(pc));
   return code;
 }
 
 
 Code* PcToCodeCache::GcSafeFindCodeForPc(Address pc) {
   // Check if the pc points into a large object chunk.
-  LargeObjectChunk* chunk = Heap::lo_space()->FindChunkContainingPc(pc);
-  if (chunk != NULL) return GcSafeCastToCode(chunk->GetObject(), pc);
+  LargePage* large_page = Heap::lo_space()->FindPageContainingPc(pc);
+  if (large_page != NULL) return GcSafeCastToCode(large_page->GetObject(), pc);
 
   // Iterate through the 8K page until we reach the end or find an
   // object starting after the pc.
   Page* page = Page::FromAddress(pc);
   HeapObjectIterator iterator(page, Heap::GcSafeSizeOfOldObjectFunction());
   HeapObject* previous = NULL;
   while (true) {
     HeapObject* next = iterator.next();
     if (next == NULL || next->address() >= pc) {
       return GcSafeCastToCode(previous, pc);
@@ skipping 85 matching lines @@
   ZoneList<StackFrame*> list(10);
   for (StackFrameIterator it; !it.done(); it.Advance()) {
     StackFrame* frame = AllocateFrameCopy(it.frame());
     list.Add(frame);
   }
   return list.ToVector();
 }
 
 
 } }  // namespace v8::internal