X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fghci%2FRtClosureInspect.hs;h=96edf90a6a3648eefce2ff40ae437bb285baf9f2;hb=cf48cf640cc96fc0cb50b5c683cf16bbede064a0;hp=8fd15c05cfd1adb010d98bc01a9d906488b9db73;hpb=1c7caf1c6d5abacb2af32d8224241c575829b9fd;p=ghc-hetmet.git diff --git a/compiler/ghci/RtClosureInspect.hs b/compiler/ghci/RtClosureInspect.hs index 8fd15c0..96edf90 100644 --- a/compiler/ghci/RtClosureInspect.hs +++ b/compiler/ghci/RtClosureInspect.hs @@ -10,21 +10,11 @@ module RtClosureInspect( cvObtainTerm, -- :: HscEnv -> Bool -> Maybe Type -> HValue -> IO Term - AddressEnv(..), - DataConEnv, - extendAddressEnvList, - elemAddressEnv, - delFromAddressEnv, - emptyAddressEnv, - lookupAddressEnv, - ClosureType(..), getClosureData, -- :: a -> IO Closure - Closure ( tipe, infoTable, ptrs, nonPtrs ), - getClosureType, -- :: a -> IO ClosureType + Closure ( tipe, infoPtr, ptrs, nonPtrs ), isConstr, -- :: ClosureType -> Bool isIndirection, -- :: ClosureType -> Bool - getInfoTablePtr, -- :: a -> Ptr StgInfoTable Term(..), printTerm, @@ -85,6 +75,8 @@ import Data.Array.Base import Data.List ( partition ) import Foreign.Storable +import IO + --------------------------------------------- -- * A representation of semi evaluated Terms --------------------------------------------- @@ -147,6 +139,7 @@ data ClosureType = Constr deriving (Show, Eq) data Closure = Closure { tipe :: ClosureType + , infoPtr :: Ptr () , infoTable :: StgInfoTable , ptrs :: Array Int HValue -- What would be the type here? HValue is ok? Should I build a Ptr? @@ -156,14 +149,6 @@ data Closure = Closure { tipe :: ClosureType instance Outputable ClosureType where ppr = text . show -getInfoTablePtr :: a -> Ptr StgInfoTable -getInfoTablePtr x = - case infoPtr# x of - itbl_ptr -> castPtr ( Ptr itbl_ptr ) - -getClosureType :: a -> IO ClosureType -getClosureType = liftM (readCType . BCI.tipe ) . peek . getInfoTablePtr - #include "../includes/ClosureTypes.h" aP_CODE = AP @@ -172,14 +157,14 @@ pAP_CODE = PAP #undef PAP getClosureData :: a -> IO Closure -getClosureData a = do - itbl <- peek (getInfoTablePtr a) - let tipe = readCType (BCI.tipe itbl) - case closurePayload# a of - (# ptrs, nptrs #) -> - let elems = BCI.ptrs itbl +getClosureData a = + case unpackClosure# a of + (# iptr, ptrs, nptrs #) -> do + itbl <- peek (Ptr iptr) + let tipe = readCType (BCI.tipe itbl) + elems = BCI.ptrs itbl ptrsList = Array 0 (fromIntegral$ elems) ptrs - in ptrsList `seq` return (Closure tipe itbl ptrsList nptrs) + ptrsList `seq` return (Closure tipe (Ptr iptr) itbl ptrsList nptrs) readCType :: Integral a => a -> ClosureType readCType i @@ -330,20 +315,21 @@ printTerm1 p Term{dc=dc, subTerms=tt} printTerm1 _ t = printTerm t -customPrintTerm :: Monad m => ((Int->Term->m SDoc)->[Term->m (Maybe SDoc)]) -> Term -> m SDoc -customPrintTerm custom = let +customPrintTerm :: forall m. Monad m => ((Int->Term->m SDoc)->[Term->m (Maybe SDoc)]) -> Term -> m SDoc +customPrintTerm custom = go 0 where -- go :: Monad m => Int -> Term -> m SDoc go prec t@Term{subTerms=tt, dc=dc} = do - mb_customDocs <- sequence$ sequence (custom go) t -- Inner sequence is List monad - case msum mb_customDocs of -- msum is in Maybe monad + let mb_customDocs = map ($t) (custom go) :: [m (Maybe SDoc)] + first_success <- firstJustM mb_customDocs + case first_success of Just doc -> return$ parensCond (prec>app_prec+1) doc -- | dataConIsInfix dc, (t1:t2:tt') <- tt = Nothing -> do pprSubterms <- mapM (go (app_prec+1)) tt return$ parensCond (prec>app_prec+1) (ppr dc <+> sep pprSubterms) go _ t = return$ printTerm t - in go 0 - where fixity = undefined + firstJustM (mb:mbs) = mb >>= maybe (firstJustM mbs) (return . Just) + firstJustM [] = return Nothing customPrintTermBase :: Monad m => (Int->Term-> m SDoc)->[Term->m (Maybe SDoc)] customPrintTermBase showP = @@ -489,9 +475,10 @@ instScheme ty = liftTcM$ liftM trd (tcInstType (liftM fst3 . tcInstTyVars) ty) trd (x,y,z) = z cvObtainTerm :: HscEnv -> Bool -> Maybe Type -> HValue -> IO Term -cvObtainTerm hsc_env force mb_ty a = - -- Obtain the term and tidy the type before returning it - cvObtainTerm1 hsc_env force mb_ty a >>= return . tidyTypes +cvObtainTerm hsc_env force mb_ty a = do + -- Obtain the term and tidy the type before returning it + term <- cvObtainTerm1 hsc_env force mb_ty a + return $ tidyTypes term where tidyTypes = foldTerm idTermFold { fTerm = \ty dc hval tt -> Term (tidy ty) dc hval tt, @@ -499,66 +486,82 @@ cvObtainTerm hsc_env force mb_ty a = Suspension ct (fmap tidy mb_ty) hval n } tidy ty = tidyType (emptyTidyOccEnv, tidyVarEnv ty) ty - tidyVarEnv ty = - - mkVarEnv$ [ (v, setTyVarName v (tyVarName tv)) - | (tv,v) <- zip alphaTyVars vars] + tidyVarEnv ty = mkVarEnv$ + [ (v, setTyVarName v (tyVarName tv)) + | (tv,v) <- zip alphaTyVars vars] where vars = varSetElems$ tyVarsOfType ty cvObtainTerm1 :: HscEnv -> Bool -> Maybe Type -> HValue -> IO Term cvObtainTerm1 hsc_env force mb_ty hval = runTR hsc_env $ do - tv <- liftM mkTyVarTy (newVar argTypeKind) - when (isJust mb_ty) $ - instScheme (sigmaType$ fromJust mb_ty) >>= addConstraint tv - go tv hval + tv <- case (isMonomorphic `fmap` mb_ty) of + Just True -> return (fromJust mb_ty) + _ -> do + tv <- liftM mkTyVarTy (newVar argTypeKind) + instScheme (sigmaType$ fromJust mb_ty) >>= addConstraint tv + return tv + go tv (fromMaybe tv mb_ty) hval where - go tv a = do - ctype <- trIO$ getClosureType a - case ctype of + go tv ty a = do + let monomorphic = not(isTyVarTy tv) -- This is a convention. The ancestor tests for + -- monomorphism and passes a type instead of a tv + clos <- trIO $ getClosureData a + case tipe clos of -- Thunks we may want to force - Thunk _ | force -> seq a $ go tv a + Thunk _ | force -> seq a $ go tv ty a -- We always follow indirections - _ | isIndirection ctype -> do - clos <- trIO$ getClosureData a - (go tv $! (ptrs clos ! 0)) + Indirection _ -> go tv ty $! (ptrs clos ! 0) -- The interesting case Constr -> do - m_dc <- trIO$ tcRnRecoverDataCon hsc_env a + m_dc <- trIO$ tcRnRecoverDataCon hsc_env (infoPtr clos) case m_dc of Nothing -> panic "Can't find the DataCon for a term" Just dc -> do - clos <- trIO$ getClosureData a let extra_args = length(dataConRepArgTys dc) - length(dataConOrigArgTys dc) - subTtypes = drop extra_args (dataConRepArgTys dc) + subTtypes = matchSubTypes dc ty (subTtypesP, subTtypesNP) = partition isPointed subTtypes - n_subtermsP= length subTtypesP - subTermTvs <- mapM (liftM mkTyVarTy . newVar ) (map typeKind subTtypesP) - baseType <- instScheme (dataConRepType dc) - let myType = mkFunTys (reOrderTerms subTermTvs subTtypesNP subTtypes) tv - addConstraint myType baseType - subTermsP <- sequence [ extractSubterm i tv (ptrs clos) - | (i,tv) <- zip [extra_args..extra_args + n_subtermsP - 1] - subTermTvs ] + subTermTvs <- sequence + [ if isMonomorphic t then return t else (mkTyVarTy `fmap` newVar k) + | (t,k) <- zip subTtypesP (map typeKind subTtypesP)] + -- It is vital for newtype reconstruction that the unification step is done + -- right here, _before_ the subterms are RTTI reconstructed. + when (not monomorphic) $ do + let myType = mkFunTys (reOrderTerms subTermTvs subTtypesNP subTtypes) tv + instScheme(dataConRepType dc) >>= addConstraint myType + subTermsP <- sequence $ drop extra_args -- all extra arguments are pointed + [ appArr (go tv t) (ptrs clos) i + | (i,tv,t) <- zip3 [0..] subTermTvs subTtypesP] let unboxeds = extractUnboxed subTtypesNP (nonPtrs clos) subTermsNP = map (uncurry Prim) (zip subTtypesNP unboxeds) - subTerms = reOrderTerms subTermsP subTermsNP subTtypes + subTerms = reOrderTerms subTermsP subTermsNP (drop extra_args subTtypes) return (Term tv dc a subTerms) -- The otherwise case: can be a Thunk,AP,PAP,etc. otherwise -> do - return (Suspension ctype (Just tv) a Nothing) + return (Suspension (tipe clos) (Just tv) a Nothing) -- Access the array of pointers and recurse down. Needs to be done with -- care of no introducing a thunk! or go will fail to do its job - extractSubterm (I# i#) tv ptrs = case ptrs of + appArr f arr (I# i#) = case arr of (Array _ _ ptrs#) -> case indexArray# ptrs# i# of - (# e #) -> go tv e + (# e #) -> f e + + matchSubTypes dc ty + | Just (_,ty_args) <- splitTyConApp_maybe (repType ty) + , null (dataConExTyVars dc) --TODO Handle the case of extra existential tyvars + = dataConInstArgTys dc ty_args + + | otherwise = dataConRepArgTys dc -- This is used to put together pointed and nonpointed subterms in the -- correct order. reOrderTerms _ _ [] = [] reOrderTerms pointed unpointed (ty:tys) - | isPointed ty = head pointed : reOrderTerms (tail pointed) unpointed tys - | otherwise = head unpointed : reOrderTerms pointed (tail unpointed) tys + | isPointed ty = head pointed : reOrderTerms (tailSafe "reorderTerms1" pointed) unpointed tys + | otherwise = head unpointed : reOrderTerms pointed (tailSafe "reorderTerms2" unpointed) tys + +tailSafe msg [] = error msg +tailSafe _ (x:xs) = xs + +isMonomorphic = isEmptyVarSet . tyVarsOfType zonkTerm :: Term -> TcM Term zonkTerm = foldTerm idTermFoldM { @@ -623,34 +626,3 @@ map Just [[1,1],[2,2]] :: [Maybe [Integer]] NOTE: (Num t) contexts have been manually replaced by Integer for clarity -} - --------------------------------------------------------------------- --- The DataConEnv is used to store the addresses of datacons loaded --- via the dynamic linker --------------------------------------------------------------------- - -type DataConEnv = AddressEnv StgInfoTable - --- Note that this AddressEnv and DataConEnv I wrote trying to follow --- conventions in ghc, but probably they make not much sense. - -newtype AddressEnv a = AE {aenv:: FiniteMap (Ptr a) Name} - deriving (Outputable) - -emptyAddressEnv = AE emptyFM - -extendAddressEnvList :: AddressEnv a -> [(Ptr a, Name)] -> AddressEnv a -elemAddressEnv :: Ptr a -> AddressEnv a -> Bool -delFromAddressEnv :: AddressEnv a -> Ptr a -> AddressEnv a -nullAddressEnv :: AddressEnv a -> Bool -lookupAddressEnv :: AddressEnv a -> Ptr a -> Maybe Name - -extendAddressEnvList (AE env) = AE . addListToFM env -elemAddressEnv ptr (AE env) = ptr `elemFM` env -delFromAddressEnv (AE env) = AE . delFromFM env -nullAddressEnv = isEmptyFM . aenv -lookupAddressEnv (AE env) = lookupFM env - - -instance Outputable (Ptr a) where - ppr = text . show