module InteractiveEval (
#ifdef GHCI
RunResult(..), Status(..), Resume(..), History(..),
- runStmt, SingleStep(..),
+ runStmt, parseImportDecl, SingleStep(..),
resume,
abandon, abandonAll,
getResumeContext,
getHistoryModule,
back, forward,
setContext, getContext,
- nameSetToGlobalRdrEnv,
+ availsToGlobalRdrEnv,
getNamesInScope,
getRdrNamesInScope,
moduleIsInterpreted,
isModuleInterpreted,
compileExpr, dynCompileExpr,
lookupName,
- Term(..), obtainTerm, obtainTerm1, obtainTermB, reconstructType,
+ Term(..), obtainTermFromId, obtainTermFromVal, reconstructType,
skolemiseSubst, skolemiseTy
#endif
) where
#include "HsVersions.h"
import HscMain hiding (compileExpr)
+import HsSyn (ImportDecl)
import HscTypes
import TcRnDriver
-import Type hiding (typeKind)
-import TcType hiding (typeKind)
+import TcRnMonad (initTc)
+import RnNames (gresFromAvails, rnImports)
import InstEnv
+import Type
+import TcType hiding( typeKind )
import Var
import Id
-import IdInfo
import Name hiding ( varName )
import NameSet
import RdrName
+import PrelNames (pRELUDE)
import VarSet
import VarEnv
import ByteCodeInstr
import UniqSupply
import Module
import Panic
-import LazyUniqFM
+import UniqFM
import Maybes
import ErrUtils
import Util
import FastString
import MonadUtils
+import System.Directory
import Data.Dynamic
-import Data.List (find)
+import Data.List (find, partition)
import Control.Monad
import Foreign
import Foreign.C
import Exception
import Control.Concurrent
import Data.List (sortBy)
-import Foreign.StablePtr
+-- import Foreign.StablePtr
+import System.IO
-- -----------------------------------------------------------------------------
-- running a statement interactively
clearWarnings
status <-
+ withVirtualCWD $
withBreakAction (isStep step) dflags' breakMVar statusMVar $ do
let thing_to_run = unsafeCoerce# hval :: IO [HValue]
liftIO $ sandboxIO dflags' statusMVar thing_to_run
handleRunStatus expr bindings ids
breakMVar statusMVar status emptyHistory
+withVirtualCWD :: GhcMonad m => m a -> m a
+withVirtualCWD m = do
+ hsc_env <- getSession
+ let ic = hsc_IC hsc_env
+
+ let set_cwd = do
+ dir <- liftIO $ getCurrentDirectory
+ case ic_cwd ic of
+ Just dir -> liftIO $ setCurrentDirectory dir
+ Nothing -> return ()
+ return dir
+
+ reset_cwd orig_dir = do
+ virt_dir <- liftIO $ getCurrentDirectory
+ hsc_env <- getSession
+ let old_IC = hsc_IC hsc_env
+ setSession hsc_env{ hsc_IC = old_IC{ ic_cwd = Just virt_dir } }
+ liftIO $ setCurrentDirectory orig_dir
+
+ gbracket set_cwd reset_cwd $ \_ -> m
+
+parseImportDecl :: GhcMonad m => String -> m (ImportDecl RdrName)
+parseImportDecl expr = withSession $ \hsc_env -> hscImport hsc_env expr
+
emptyHistory :: BoundedList History
emptyHistory = nilBL 50 -- keep a log of length 50
let history' = mkHistory hsc_env apStack info `consBL` history
-- probably better make history strict here, otherwise
-- our BoundedList will be pointless.
- liftIO $ evaluate history'
+ _ <- liftIO $ evaluate history'
status <-
withBreakAction True (hsc_dflags hsc_env)
breakMVar statusMVar $ do
-- is not responding".
--
-- Careful here: there may be ^C exceptions flying around, so we start the new
--- thread blocked (forkIO inherits block from the parent, #1048), and unblock
+-- thread blocked (forkIO inherits mask from the parent, #1048), and unblock
-- only while we execute the user's code. We can't afford to lose the final
-- putMVar, otherwise deadlock ensues. (#1583, #1922, #1946)
sandboxIO :: DynFlags -> MVar Status -> IO [HValue] -> IO Status
sandboxIO dflags statusMVar thing =
- block $ do -- fork starts blocked
- id <- forkIO $ do res <- Exception.try (unblock $ rethrow dflags thing)
+ mask $ \restore -> do -- fork starts blocked
+ id <- forkIO $ do res <- Exception.try (restore $ rethrow dflags thing)
putMVar statusMVar (Complete res) -- empty: can't block
withInterruptsSentTo id $ takeMVar statusMVar
-- not "Interrupted", we unset the exception flag before throwing.
--
rethrow :: DynFlags -> IO a -> IO a
-#if __GLASGOW_HASKELL__ < 609
-rethrow dflags io = Exception.catch io $ \e -> do -- NB. not catchDyn
- case e of
- -- If -fbreak-on-error, we break unconditionally,
- -- but with care of not breaking twice
- _ | dopt Opt_BreakOnError dflags &&
- not(dopt Opt_BreakOnException dflags)
- -> poke exceptionFlag 1
-
- -- If it is an "Interrupted" exception, we allow
- -- a possible break by way of -fbreak-on-exception
- DynException d | Just Interrupted <- fromDynamic d
- -> return ()
-
- -- In any other case, we don't want to break
- _ -> poke exceptionFlag 0
-
- Exception.throwIO e
-#else
-rethrow dflags io = Exception.catch io $ \se@(SomeException e) -> do
+rethrow dflags io = Exception.catch io $ \se -> do
-- If -fbreak-on-error, we break unconditionally,
-- but with care of not breaking twice
if dopt Opt_BreakOnError dflags &&
not (dopt Opt_BreakOnException dflags)
then poke exceptionFlag 1
- else case cast e of
- -- If it is an "Interrupted" exception, we allow
+ else case fromException se of
+ -- If it is a "UserInterrupt" exception, we allow
-- a possible break by way of -fbreak-on-exception
- Just Interrupted -> return ()
+ Just UserInterrupt -> return ()
-- In any other case, we don't want to break
_ -> poke exceptionFlag 0
Exception.throwIO se
-#endif
withInterruptsSentTo :: ThreadId -> IO r -> IO r
withInterruptsSentTo thread get_result = do
noBreakAction False _ _ = putStrLn "*** Ignoring breakpoint"
noBreakAction True _ _ = return () -- exception: just continue
-resume :: GhcMonad m => SingleStep -> m RunResult
-resume step
+resume :: GhcMonad m => (SrcSpan->Bool) -> SingleStep -> m RunResult
+resume canLogSpan step
= do
hsc_env <- getSession
let ic = hsc_IC hsc_env
when (isStep step) $ liftIO setStepFlag
case r of
Resume expr tid breakMVar statusMVar bindings
- final_ids apStack info _ hist _ -> do
+ final_ids apStack info span hist _ -> do
+ withVirtualCWD $ do
withBreakAction (isStep step) (hsc_dflags hsc_env)
breakMVar statusMVar $ do
status <- liftIO $ withInterruptsSentTo tid $ do
-- this awakens the stopped thread...
takeMVar statusMVar
-- and wait for the result
- let hist' =
- case info of
- Nothing -> fromListBL 50 hist
- Just i -> mkHistory hsc_env apStack i `consBL`
+ let prevHistoryLst = fromListBL 50 hist
+ hist' = case info of
+ Nothing -> prevHistoryLst
+ Just i
+ | not $canLogSpan span -> prevHistoryLst
+ | otherwise -> mkHistory hsc_env apStack i `consBL`
fromListBL 50 hist
case step of
RunAndLogSteps ->
e_fs = fsLit "e"
e_name = mkInternalName (getUnique e_fs) (mkTyVarOccFS e_fs) span
e_tyvar = mkTcTyVar e_name liftedTypeKind (SkolemTv RuntimeUnkSkol)
- exn_id = Id.mkGlobalId VanillaGlobal exn_name (mkTyVarTy e_tyvar)
- vanillaIdInfo
+ exn_id = Id.mkVanillaGlobal exn_name (mkTyVarTy e_tyvar)
new_tyvars = unitVarSet e_tyvar
ictxt0 = hsc_IC hsc_env
-- has been accidentally evaluated, or something else has gone wrong.
-- So that we don't fall over in a heap when this happens, just don't
-- bind any free variables instead, and we emit a warning.
- mb_hValues <- mapM (getIdValFromApStack apStack) offsets
+ mb_hValues <- mapM (getIdValFromApStack apStack) (map fromIntegral offsets)
let filtered_ids = [ id | (id, Just _hv) <- zip ids mb_hValues ]
when (any isNothing mb_hValues) $
debugTraceMsg (hsc_dflags hsc_env) 1 $
-- _result in scope at any time.
let result_name = mkInternalName (getUnique result_fs)
(mkVarOccFS result_fs) span
- result_id = Id.mkGlobalId VanillaGlobal result_name result_ty
- vanillaIdInfo
+ result_id = Id.mkVanillaGlobal result_name result_ty
-- for each Id we're about to bind in the local envt:
-- - skolemise the type variables in its type, so they can't
-- - tidy the type variables
-- - globalise the Id (Ids are supposed to be Global, apparently).
--
- let all_ids | isPointer result_id = result_id : new_ids
- | otherwise = new_ids
+ let result_ok = isPointer result_id
+ && not (isUnboxedTupleType (idType result_id))
+
+ all_ids | result_ok = result_id : new_ids
+ | otherwise = new_ids
(id_tys, tyvarss) = mapAndUnzip (skolemiseTy.idType) all_ids
(_,tidy_tys) = tidyOpenTypes emptyTidyEnv id_tys
new_tyvars = unionVarSets tyvarss
- let final_ids = zipWith setIdType all_ids tidy_tys
+ final_ids = zipWith setIdType all_ids tidy_tys
ictxt0 = hsc_IC hsc_env
ictxt1 = extendInteractiveContext ictxt0 final_ids new_tyvars
+
Linker.extendLinkEnv [ (name,hval) | (name, Just hval) <- zip names mb_hValues ]
- Linker.extendLinkEnv [(result_name, unsafeCoerce# apStack)]
+ when result_ok $ Linker.extendLinkEnv [(result_name, unsafeCoerce# apStack)]
hsc_env1 <- rttiEnvironment hsc_env{ hsc_IC = ictxt1 }
- return (hsc_env1, result_name:names, span)
+ return (hsc_env1, if result_ok then result_name:names else names, span)
where
mkNewId :: OccName -> Id -> IO Id
mkNewId occ id = do
loc = nameSrcSpan (idName id)
name = mkInternalName uniq occ loc
ty = idType id
- new_id = Id.mkGlobalId VanillaGlobal name ty (idInfo id)
+ new_id = Id.mkVanillaGlobalWithInfo name ty (idInfo id)
return new_id
rttiEnvironment :: HscEnv -> IO HscEnv
let InteractiveContext{ic_tmp_ids=tmp_ids} = ic
incompletelyTypedIds =
[id | id <- tmp_ids
- , not $ null [v | v <- varSetElems$ tyVarsOfType (idType id)
- , isSkolemTyVar v]
+ , not $ noSkolems id
, (occNameFS.nameOccName.idName) id /= result_fs]
- tys <- reconstructType hsc_env 10 `mapM` incompletelyTypedIds
- -- map termType `fmap` (obtainTerm hsc_env False `mapM` incompletelyTypedIds)
-
- improvs <- sequence [improveRTTIType hsc_env ty ty'
- | (ty, Just ty') <- zip (map idType incompletelyTypedIds) tys]
- let ic' = foldr (\mb_subst ic' ->
- maybe (WARN(True, text ("RTTI failed to calculate the "
- ++ "improvement for a type")) ic')
- (substInteractiveContext ic' . skolemiseSubst)
- mb_subst)
- ic
- improvs
- return hsc_env{hsc_IC=ic'}
-
-skolemiseSubst :: TvSubst -> TvSubst
-skolemiseSubst subst = subst `setTvSubstEnv`
- mapVarEnv (fst.skolemiseTy) (getTvSubstEnv subst)
+ hsc_env' <- foldM improveTypes hsc_env (map idName incompletelyTypedIds)
+ return hsc_env'
+ where
+ noSkolems = null . filter isSkolemTyVar . varSetElems . tyVarsOfType . idType
+ improveTypes hsc_env@HscEnv{hsc_IC=ic} name = do
+ let InteractiveContext{ic_tmp_ids=tmp_ids} = ic
+ Just id = find (\i -> idName i == name) tmp_ids
+ if noSkolems id
+ then return hsc_env
+ else do
+ mb_new_ty <- reconstructType hsc_env 10 id
+ let old_ty = idType id
+ case mb_new_ty of
+ Nothing -> return hsc_env
+ Just new_ty -> do
+ mb_subst <- improveRTTIType hsc_env old_ty new_ty
+ case mb_subst of
+ Nothing -> return $
+ WARN(True, text (":print failed to calculate the "
+ ++ "improvement for a type")) hsc_env
+ Just subst -> do
+ when (dopt Opt_D_dump_rtti (hsc_dflags hsc_env)) $
+ printForUser stderr alwaysQualify $
+ fsep [text "RTTI Improvement for", ppr id, equals, ppr subst]
+
+ let (subst', skols) = skolemiseSubst subst
+ ic' = extendInteractiveContext
+ (substInteractiveContext ic subst') [] skols
+ return hsc_env{hsc_IC=ic'}
+
+skolemiseSubst :: TvSubst -> (TvSubst, TyVarSet)
+skolemiseSubst subst = let
+ varenv = getTvSubstEnv subst
+ all_together = mapVarEnv skolemiseTy varenv
+ (varenv', skol_vars) = ( mapVarEnv fst all_together
+ , map snd (varEnvElts all_together))
+ in (subst `setTvSubstEnv` varenv', unionVarSets skol_vars)
+
skolemiseTy :: Type -> (Type, TyVarSet)
skolemiseTy ty = (substTy subst ty, mkVarSet new_tyvars)
-- we've built up in the InteractiveContext simply move to the new
-- module. They always shadow anything in scope in the current context.
setContext :: GhcMonad m =>
- [Module] -- ^ entire top level scope of these modules
- -> [Module] -- ^ exports only of these modules
- -> m ()
-setContext toplev_mods export_mods = do
- hsc_env <- getSession
- let old_ic = hsc_IC hsc_env
- hpt = hsc_HPT hsc_env
- --
- export_env <- liftIO $ mkExportEnv hsc_env export_mods
- toplev_envs <- liftIO $ mapM (mkTopLevEnv hpt) toplev_mods
- let all_env = foldr plusGlobalRdrEnv export_env toplev_envs
- modifySession $ \_ ->
- hsc_env{ hsc_IC = old_ic { ic_toplev_scope = toplev_mods,
- ic_exports = export_mods,
- ic_rn_gbl_env = all_env }}
+ [Module] -- ^ entire top level scope of these modules
+ -> [(Module, Maybe (ImportDecl RdrName))] -- ^ exports of these modules
+ -> m ()
+setContext toplev_mods other_mods = do
+ hsc_env <- getSession
+ let old_ic = hsc_IC hsc_env
+ hpt = hsc_HPT hsc_env
+ (decls,mods) = partition (isJust . snd) other_mods -- time for tracing
+ export_mods = map fst mods
+ imprt_decls = map noLoc (catMaybes (map snd decls))
+ --
+ export_env <- liftIO $ mkExportEnv hsc_env export_mods
+ import_env <-
+ if null imprt_decls then return emptyGlobalRdrEnv else do
+ let imports = rnImports imprt_decls
+ this_mod = if null toplev_mods then pRELUDE else head toplev_mods
+ (_, env, _,_) <-
+ ioMsgMaybe $ liftIO $ initTc hsc_env HsSrcFile False this_mod imports
+ return env
+ toplev_envs <- liftIO $ mapM (mkTopLevEnv hpt) toplev_mods
+ let all_env = foldr plusGlobalRdrEnv (plusGlobalRdrEnv export_env import_env) toplev_envs
+ modifySession $ \_ ->
+ hsc_env{ hsc_IC = old_ic { ic_toplev_scope = toplev_mods,
+ ic_exports = other_mods,
+ ic_rn_gbl_env = all_env }}
-- Make a GlobalRdrEnv based on the exports of the modules only.
mkExportEnv :: HscEnv -> [Module] -> IO GlobalRdrEnv
-mkExportEnv hsc_env mods = do
- stuff <- mapM (getModuleExports hsc_env) mods
- let
- (_msgs, mb_name_sets) = unzip stuff
- gres = [ nameSetToGlobalRdrEnv (availsToNameSet avails) (moduleName mod)
- | (Just avails, mod) <- zip mb_name_sets mods ]
- --
- return $! foldr plusGlobalRdrEnv emptyGlobalRdrEnv gres
-
-nameSetToGlobalRdrEnv :: NameSet -> ModuleName -> GlobalRdrEnv
-nameSetToGlobalRdrEnv names mod =
- mkGlobalRdrEnv [ GRE { gre_name = name, gre_par = NoParent, gre_prov = vanillaProv mod }
- | name <- nameSetToList names ]
-
-vanillaProv :: ModuleName -> Provenance
--- We're building a GlobalRdrEnv as if the user imported
--- all the specified modules into the global interactive module
-vanillaProv mod_name = Imported [ImpSpec { is_decl = decl, is_item = ImpAll}]
+mkExportEnv hsc_env mods
+ = do { stuff <- mapM (getModuleExports hsc_env) mods
+ ; let (_msgs, mb_name_sets) = unzip stuff
+ envs = [ availsToGlobalRdrEnv (moduleName mod) avails
+ | (Just avails, mod) <- zip mb_name_sets mods ]
+ ; return $! foldr plusGlobalRdrEnv emptyGlobalRdrEnv envs }
+
+availsToGlobalRdrEnv :: ModuleName -> [AvailInfo] -> GlobalRdrEnv
+availsToGlobalRdrEnv mod_name avails
+ = mkGlobalRdrEnv (gresFromAvails imp_prov avails)
where
+ -- We're building a GlobalRdrEnv as if the user imported
+ -- all the specified modules into the global interactive module
+ imp_prov = Imported [ImpSpec { is_decl = decl, is_item = ImpAll}]
decl = ImpDeclSpec { is_mod = mod_name, is_as = mod_name,
is_qual = False,
is_dloc = srcLocSpan interactiveSrcLoc }
-- | Get the interactive evaluation context, consisting of a pair of the
-- set of modules from which we take the full top-level scope, and the set
-- of modules from which we take just the exports respectively.
-getContext :: GhcMonad m => m ([Module],[Module])
+getContext :: GhcMonad m => m ([Module],[(Module, Maybe (ImportDecl RdrName))])
getContext = withSession $ \HscEnv{ hsc_IC=ic } ->
return (ic_toplev_scope ic, ic_exports ic)
setContext full $
(mkModule
(stringToPackageId "base") (mkModuleName "Data.Dynamic")
- ):exports
+ ,Nothing):exports
let stmt = "let __dynCompileExpr = Data.Dynamic.toDyn (" ++ expr ++ ")"
Just (ids, hvals) <- withSession (flip hscStmt stmt)
setContext full exports
----------------------------------------------------------------------------
-- RTTI primitives
-obtainTerm1 :: HscEnv -> Bool -> Maybe Type -> a -> IO Term
-obtainTerm1 hsc_env force mb_ty x =
- cvObtainTerm hsc_env maxBound force mb_ty (unsafeCoerce# x)
-
-obtainTermB :: HscEnv -> Int -> Bool -> Id -> IO Term
-obtainTermB hsc_env bound force id = do
- hv <- Linker.getHValue hsc_env (varName id)
- cvObtainTerm hsc_env bound force (Just$ idType id) hv
+obtainTermFromVal :: HscEnv -> Int -> Bool -> Type -> a -> IO Term
+obtainTermFromVal hsc_env bound force ty x =
+ cvObtainTerm hsc_env bound force ty (unsafeCoerce# x)
-obtainTerm :: HscEnv -> Bool -> Id -> IO Term
-obtainTerm hsc_env force id = do
- hv <- Linker.getHValue hsc_env (varName id)
- cvObtainTerm hsc_env maxBound force (Just$ idType id) hv
+obtainTermFromId :: HscEnv -> Int -> Bool -> Id -> IO Term
+obtainTermFromId hsc_env bound force id = do
+ hv <- Linker.getHValue hsc_env (varName id)
+ cvObtainTerm hsc_env bound force (idType id) hv
-- Uses RTTI to reconstruct the type of an Id, making it less polymorphic
reconstructType :: HscEnv -> Int -> Id -> IO (Maybe Type)
reconstructType hsc_env bound id = do
hv <- Linker.getHValue hsc_env (varName id)
- cvReconstructType hsc_env bound (Just$ idType id) hv
+ cvReconstructType hsc_env bound (idType id) hv
+
#endif /* GHCI */
+
projects / ghc-hetmet.git / blobdiff