Add functionality for finding code objects from a pc that points into...

src/spaces.h

Index: src/spaces.h
===================================================================
--- src/spaces.h	(revision 5368)
+++ src/spaces.h	(working copy)
@@ -756,6 +756,7 @@
   HeapObjectIterator(PagedSpace* space,
                      Address start,
                      HeapObjectCallback size_func);
+  HeapObjectIterator(Page* page, HeapObjectCallback size_func);
 
   inline HeapObject* next() {
     return (cur_addr_ < cur_limit_) ? FromCurrentPage() : FromNextPage();
@@ -2137,6 +2138,11 @@
   // space, may be slow.
   Object* FindObject(Address a);
 
+  // Finds a large object page containing the given pc, returns NULL
+  // if such a page doesn't exist.
+  LargeObjectChunk* FindChunkContainingPc(Address pc);
+
+
   // Iterates objects covered by dirty regions.
   void IterateDirtyRegions(ObjectSlotCallback func);