/* debugging routines */
extern void checkHeap ( bdescr *bd );
extern void checkHeapChunk ( StgPtr start, StgPtr end );
-extern void checkChain ( bdescr *bd );
+extern void checkLargeObjects ( bdescr *bd );
extern void checkTSO ( StgTSO* tso );
extern void checkGlobalTSOList ( rtsBool checkTSOs );
extern void checkStaticObjects ( StgClosure* static_objects );