[project @ 1999-12-20 10:12:50 by simonpj]

[ghc-hetmet.git] / ghc / rts / Stable.c

diff --git a/ghc/rts/Stable.c b/ghc/rts/Stable.c
index 01982b3..2d280a4 100644 (file)
--- a/ghc/rts/Stable.c
+++ b/ghc/rts/Stable.c
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------------
- * $Id: Stable.c,v 1.8 1999/09/15 13:50:14 sof Exp $
+ * $Id: Stable.c,v 1.9 1999/10/26 17:15:39 sewardj Exp $
  *
  * (c) The GHC Team, 1998-1999
  *
@@ -199,7 +199,6 @@ getStablePtr(StgPtr p)
 {
   StgWord sn = lookupStableName(p);
   StgWord weight, weight_2;
-
   weight = stable_ptr_table[sn].weight;
   if (weight == 0) {
     weight = (StgWord)1 << (BITS_IN(StgWord)-1);
@@ -290,8 +289,10 @@ markStablePtrTable(rtsBool full)
          (StgClosure *)p->addr = new;
        } else if ((P_)new != q) {
          removeHashTable(addrToStableHash, (W_)q, NULL);
-         insertHashTable(addrToStableHash, (W_)new, 
-                         (void *)(p - stable_ptr_table));
+         if (!lookupHashTable(addrToStableHash, (W_)new)) {
+           insertHashTable(addrToStableHash, (W_)new, 
+                           (void *)(p - stable_ptr_table));
+         }
          (StgClosure *)p->addr = new;
        }
        IF_DEBUG(stable, fprintf(stderr,"Stable ptr %d still alive at %p, weight %d\n", p - stable_ptr_table, new, p->weight));