/* -----------------------------------------------------------------------------
- * $Id: StgMiscClosures.hc,v 1.75 2002/04/19 10:15:22 simonmar Exp $
+ * $Id: StgMiscClosures.hc,v 1.76 2002/04/19 10:22:58 simonmar Exp $
*
* (c) The GHC Team, 1998-2000
*
INFO_TABLE(stg_WEAK_info,stg_WEAK_entry,0,4,WEAK,,EF_,"WEAK","WEAK");
NON_ENTERABLE_ENTRY_CODE(WEAK);
-// XXX! The garbage collector replaces a WEAK with a DEAD_WEAK
-// in-place, which causes problems if the heap is scanned linearly
-// after GC (certain kinds of profiling do this). So when profiling,
-// we set the size of a DEAD_WEAK to 4 non-pointers, rather than its
-// usual 1.
+// It's important when turning an existing WEAK into a DEAD_WEAK
+// (which is what finalizeWeak# does) that we don't lose the link
+// field and break the linked list of weak pointers. Hence, we give
+// DEAD_WEAK 4 non-pointer fields, the same as WEAK.
INFO_TABLE_CONSTR(stg_DEAD_WEAK_info,stg_DEAD_WEAK_entry,0,4,0,CONSTR,,EF_,"DEAD_WEAK","DEAD_WEAK");
NON_ENTERABLE_ENTRY_CODE(DEAD_WEAK);