Do not link ghc stage1 using -threaded, only for stage2 or 3

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

diff --git a/rts/ThreadPaused.c b/rts/ThreadPaused.c
index 674d0d9..4882ab2 100644 (file)
--- a/rts/ThreadPaused.c
+++ b/rts/ThreadPaused.c
@@ -74,7 +74,7 @@ stackSqueeze(StgTSO *tso, StgPtr bottom)
                 * screw us up if we don't check.
                 */
                if (upd->updatee != updatee && !closure_IND(upd->updatee)) {
-                   UPD_IND_NOLOCK(upd->updatee, updatee);
+                   UPD_IND(upd->updatee, updatee);
                }
 
                // now mark this update frame as a stack gap.  The gap
@@ -195,6 +195,10 @@ threadPaused(Capability *cap, StgTSO *tso)
     maybePerformBlockedException (cap, tso);
     if (tso->what_next == ThreadKilled) { return; }
 
+    // NB. Blackholing is *not* optional, we must either do lazy
+    // blackholing, or eager blackholing consistently.  See Note
+    // [upd-black-hole] in sm/Scav.c.
+
     stack_end = &tso->stack[tso->stack_size];
     
     frame = (StgClosure *)tso->sp;