X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fghci%2FRtClosureInspect.hs;h=fa167e32ba68356d7682651fd3ca63a258b7ec74;hp=cc1604761634ebdbe03360dbeab6567d49fa1de4;hb=295e7569c4793d210afbd05b42c81571b170baa9;hpb=30a08433b46de89511fcdf0149f0749739227efb

diff --git a/compiler/ghci/RtClosureInspect.hs b/compiler/ghci/RtClosureInspect.hs
index cc16047..fa167e3 100644
--- a/compiler/ghci/RtClosureInspect.hs
+++ b/compiler/ghci/RtClosureInspect.hs
@@ -74,9 +74,9 @@ import Data.Ix
 import Data.List
 import qualified Data.Sequence as Seq
 import Data.Monoid
-import Data.Sequence hiding (null, length, index, take, drop, splitAt, reverse)
-import Foreign
--- import System.IO.Unsafe
+import Data.Sequence (viewl, ViewL(..))
+import Foreign hiding (unsafePerformIO)
+import System.IO.Unsafe
 
 ---------------------------------------------
 -- * A representation of semi evaluated Terms
@@ -165,7 +165,7 @@ data Closure = Closure { tipe         :: ClosureType
 instance Outputable ClosureType where
   ppr = text . show 
 
-#include "../includes/ClosureTypes.h"
+#include "../includes/rts/storage/ClosureTypes.h"
 
 aP_CODE, pAP_CODE :: Int
 aP_CODE = AP
@@ -569,13 +569,13 @@ liftTcM :: TcM a -> TR a
 liftTcM = id
 
 newVar :: Kind -> TR TcType
-newVar = liftTcM . liftM mkTyVarTy . newBoxyTyVar
+newVar = liftTcM . newFlexiTyVarTy
 
 -- | Returns the instantiated type scheme ty', and the substitution sigma 
 --   such that sigma(ty') = ty 
 instScheme :: Type -> TR (TcType, TvSubst)
 instScheme ty = liftTcM$ do
-   (tvs, _, _)      <- tcInstType return ty
+   (tvs, _, _)  <- tcInstType return ty
    (tvs',_,ty') <- tcInstType (mapM tcInstTyVar) ty
    return (ty', zipTopTvSubst tvs' (mkTyVarTys tvs))
 
@@ -590,7 +590,7 @@ addConstraint actual expected = do
     recoverTR (traceTR $ fsep [text "Failed to unify", ppr actual,
                                     text "with", ppr expected])
               (congruenceNewtypes actual expected >>=
-                           (getLIE . uncurry boxyUnify) >> return ())
+                           (getConstraints . uncurry unifyType) >> return ())
      -- TOMDO: what about the coercion?
      -- we should consider family instances
 
@@ -654,11 +654,13 @@ cvObtainTerm hsc_env max_depth force old_ty hval = runTR hsc_env $ do
     clos <- trIO $ getClosureData a
     case tipe clos of
 -- Thunks we may want to force
--- NB. this won't attempt to force a BLACKHOLE.  Even with :force, we never
--- force blackholes, because it would almost certainly result in deadlock,
--- and showing the '_' is more useful.
       t | isThunk t && force -> traceTR (text "Forcing a " <> text (show t)) >>
                                 seq a (go (pred max_depth) my_ty old_ty a)
+-- Blackholes are indirections iff the payload is not TSO or BLOCKING_QUEUE.  So we
+-- treat them like indirections; if the payload is TSO or BLOCKING_QUEUE, we'll end up
+-- showing '_' which is what we want.
+      Blackhole -> do traceTR (text "Following a BLACKHOLE")
+                      appArr (go max_depth my_ty old_ty) (ptrs clos) 0
 -- We always follow indirections
       Indirection i -> do traceTR (text "Following an indirection" <> parens (int i) )
                           go max_depth my_ty old_ty $! (ptrs clos ! 0)
@@ -817,6 +819,7 @@ cvReconstructType hsc_env max_depth old_ty hval = runTR_maybe hsc_env $ do
   go my_ty a = do
     clos <- trIO $ getClosureData a
     case tipe clos of
+      Blackhole -> appArr (go my_ty) (ptrs clos) 0 -- carefully, don't eval the TSO
       Indirection _ -> go my_ty $! (ptrs clos ! 0)
       MutVar _ -> do
          contents <- trIO$ IO$ \w -> readMutVar# (unsafeCoerce# a) w
@@ -858,7 +861,7 @@ improveRTTIType hsc_env _ty rtti_ty = runTR_maybe hsc_env $ do
     (ty_tvs,  _, _)   <- tcInstType return ty
     (ty_tvs', _, ty') <- tcInstType (mapM tcInstTyVar) ty
     (_, _, rtti_ty')  <- tcInstType (mapM tcInstTyVar) (sigmaType rtti_ty)
-    _ <- getLIE(boxyUnify rtti_ty' ty')
+    _ <- getConstraints(unifyType rtti_ty' ty')
     tvs1_contents     <- zonkTcTyVars ty_tvs'
     let subst = (uncurry zipTopTvSubst . unzip)
                  [(tv,ty) | (tv,ty) <- zip ty_tvs tvs1_contents
@@ -1098,7 +1101,7 @@ congruenceNewtypes lhs rhs = go lhs rhs >>= \rhs' -> return (lhs,rhs')
                         text " in presence of newtype evidence " <> ppr new_tycon)
                vars <- mapM (newVar . tyVarKind) (tyConTyVars new_tycon)
                let ty' = mkTyConApp new_tycon vars
-               _ <- liftTcM (boxyUnify ty (repType ty'))
+               _ <- liftTcM (unifyType ty (repType ty'))
         -- assumes that reptype doesn't ^^^^ touch tyconApp args 
                return ty'