-- * Flags and settings
DynFlags(..), DynFlag(..), Severity(..), HscTarget(..), dopt,
- GhcMode(..), GhcLink(..),
+ GhcMode(..), GhcLink(..), defaultObjectTarget,
parseDynamicFlags,
getSessionDynFlags,
setSessionDynFlags,
+ parseStaticFlags,
-- * Targets
Target(..), TargetId(..), Phase,
workingDirectoryChanged,
checkModule, CheckedModule(..),
TypecheckedSource, ParsedSource, RenamedSource,
+ compileToCore,
-- * Parsing Haddock comments
parseHaddockComment,
getModuleInfo,
modInfoTyThings,
modInfoTopLevelScope,
- modInfoPrintUnqualified,
- modInfoExports,
+ modInfoExports,
modInfoInstances,
modInfoIsExportedName,
modInfoLookupName,
lookupGlobalName,
+ mkPrintUnqualifiedForModule,
-- * Printing
PrintUnqualified, alwaysQualify,
exprType,
typeKind,
parseName,
- RunResult(..), ResumeHandle,
- runStmt,
+ RunResult(..),
+ runStmt, SingleStep(..),
resume,
+ Resume(resumeStmt, resumeThreadId, resumeBreakInfo, resumeSpan,
+ resumeHistory, resumeHistoryIx),
+ History(historyBreakInfo, historyEnclosingDecl),
+ GHC.getHistorySpan, getHistoryModule,
+ getResumeContext,
+ abandon, abandonAll,
+ InteractiveEval.back,
+ InteractiveEval.forward,
showModule,
isModuleInterpreted,
compileExpr, HValue, dynCompileExpr,
lookupName,
- obtainTerm, obtainTerm1,
+ GHC.obtainTerm, GHC.obtainTerm1, GHC.obtainTermB, reconstructType,
+ modInfoModBreaks,
ModBreaks(..), BreakIndex,
BreakInfo(breakInfo_number, breakInfo_module),
- modInfoModBreaks,
+ BreakArray, setBreakOn, setBreakOff, getBreak,
#endif
-- * Abstract syntax elements
-- ** Names
Name,
- nameModule, pprParenSymName, nameSrcLoc,
+ isExternalName, nameModule, pprParenSymName, nameSrcSpan,
NamedThing(..),
RdrName(Qual,Unqual),
-- ** Source locations
SrcLoc, pprDefnLoc,
+ mkSrcLoc, isGoodSrcLoc, noSrcLoc,
+ srcLocFile, srcLocLine, srcLocCol,
+ SrcSpan,
+ mkSrcSpan, srcLocSpan, isGoodSrcSpan, noSrcSpan,
+ srcSpanStart, srcSpanEnd,
+ srcSpanFile,
+ srcSpanStartLine, srcSpanEndLine,
+ srcSpanStartCol, srcSpanEndCol,
-- * Exceptions
GhcException(..), showGhcException,
#include "HsVersions.h"
#ifdef GHCI
-import RtClosureInspect ( cvObtainTerm, Term )
-import TcRnDriver ( tcRnLookupRdrName, tcRnGetInfo,
- tcRnLookupName, getModuleExports )
-import VarEnv ( emptyTidyEnv )
-import GHC.Exts ( unsafeCoerce#, Ptr )
-import Foreign.StablePtr( deRefStablePtr, StablePtr, newStablePtr, freeStablePtr )
-import Foreign ( poke )
import qualified Linker
-
-import Data.Dynamic ( Dynamic )
-import Linker ( HValue, getHValue, extendLinkEnv )
-
+import Linker ( HValue )
import ByteCodeInstr
-import DebuggerTys
-import IdInfo
-import HscMain ( hscParseIdentifier, hscTcExpr, hscKcType, hscStmt )
+import BreakArray
+import NameSet
+import TcRnDriver
+import InteractiveEval
#endif
import Packages
import RdrName
import HsSyn
import Type hiding (typeKind)
+import TcType hiding (typeKind)
import Id
import Var hiding (setIdType)
import TysPrim ( alphaTyVars )
import DataCon
import Name hiding ( varName )
import OccName ( parenSymOcc )
-import NameEnv
import InstEnv ( Instance, instanceDFunId, pprInstance, pprInstanceHdr )
import SrcLoc
+import CoreSyn
import DriverPipeline
-import DriverPhases ( Phase(..), isHaskellSrcFilename, startPhase )
+import DriverPhases ( HscSource(..), Phase(..), isHaskellSrcFilename, startPhase )
import HeaderInfo ( getImports, getOptions )
import Finder
import HscMain ( newHscEnv, hscFileCheck, HscChecked(..) )
import HscTypes
import DynFlags
+import StaticFlags
import SysTools ( initSysTools, cleanTempFiles, cleanTempFilesExcept,
cleanTempDirs )
import Module
import UniqFM
+import UniqSet
+import Unique
import PackageConfig
import FiniteMap
import Panic
import StringBuffer ( StringBuffer, hGetStringBuffer )
import Outputable
import BasicTypes
-import TcType ( tcSplitSigmaTy, isDictTy )
import Maybes ( expectJust, mapCatMaybes )
import HaddockParse
import HaddockLex ( tokenise )
import Control.Exception as Exception hiding (handle)
import Data.IORef
import System.IO
-import System.IO.Error ( isDoesNotExistError )
+import System.IO.Error ( try, isDoesNotExistError )
import Prelude hiding (init)
-#if __GLASGOW_HASKELL__ < 600
-import System.IO as System.IO.Error ( try )
-#else
-import System.IO.Error ( try )
-#endif
-- -----------------------------------------------------------------------------
-- Exception handlers
inner
-#if defined(GHCI)
-GLOBAL_VAR(v_bkptLinkEnv, [], [(Name, HValue)])
- -- stores the current breakpoint handler to help setContext to
- -- restore it after a context change
-#endif
-
-- | Starts a new session. A session consists of a set of loaded
-- modules, a set of options (DynFlags), and an interactive context.
newSession :: Maybe FilePath -> IO Session
modifyMVar_ interruptTargetThread (return . (main_thread :))
installSignalHandlers
+ initStaticOpts
dflags0 <- initSysTools mb_top_dir defaultDynFlags
dflags <- initDynFlags dflags0
env <- newHscEnv dflags
sessionHscEnv :: Session -> IO HscEnv
sessionHscEnv (Session ref) = readIORef ref
-withSession :: Session -> (HscEnv -> IO a) -> IO a
-withSession (Session ref) f = do h <- readIORef ref; f h
-
-modifySession :: Session -> (HscEnv -> HscEnv) -> IO ()
-modifySession (Session ref) f = do h <- readIORef ref; writeIORef ref $! f h
-
-- -----------------------------------------------------------------------------
-- Flags & settings
hsc_env <- readIORef ref
let
dflags = hsc_dflags hsc_env
- gmode = ghcMode (hsc_dflags hsc_env)
targets = hsc_targets hsc_env
old_graph = hsc_mod_graph hsc_env
-- graph is still retained in the Session. We can tell which modules
-- were successfully loaded by inspecting the Session's HPT.
mb_graph <- depanal s [] False
- case mb_graph of
- Just mod_graph -> load2 s how_much mod_graph
+ case mb_graph of
+ Just mod_graph -> catchingFailure $ load2 s how_much mod_graph
Nothing -> return Failed
-
+ where catchingFailure f = f `Exception.catch` \e -> do
+ hsc_env <- readIORef ref
+ -- trac #1565 / test ghci021:
+ -- let bindings may explode if we try to use them after
+ -- failing to reload
+ writeIORef ref $! hsc_env{ hsc_IC = emptyInteractiveContext }
+ throw e
+
+load2 :: Session -> LoadHowMuch -> [ModSummary] -> IO SuccessFlag
load2 s@(Session ref) how_much mod_graph = do
guessOutputFile s
hsc_env <- readIORef ref
let hpt1 = hsc_HPT hsc_env
let dflags = hsc_dflags hsc_env
- let ghci_mode = ghcMode dflags -- this never changes
-- The "bad" boot modules are the ones for which we have
-- B.hs-boot in the module graph, but no B.hs
-- (see msDeps)
let all_home_mods = [ms_mod_name s
| s <- mod_graph, not (isBootSummary s)]
-#ifdef DEBUG
bad_boot_mods = [s | s <- mod_graph, isBootSummary s,
not (ms_mod_name s `elem` all_home_mods)]
-#endif
ASSERT( null bad_boot_mods ) return ()
-- mg2_with_srcimps drops the hi-boot nodes, returning a
-- short of the specified module (unless the specified module
-- is stable).
partial_mg
- | LoadDependenciesOf mod <- how_much
+ | LoadDependenciesOf _mod <- how_much
= ASSERT( case last partial_mg0 of
- AcyclicSCC ms -> ms_mod_name ms == mod; _ -> False )
+ AcyclicSCC ms -> ms_mod_name ms == _mod; _ -> False )
List.init partial_mg0
| otherwise
= partial_mg0
-- Finish up after a load.
-- If the link failed, unload everything and return.
-loadFinish all_ok Failed ref hsc_env
+loadFinish :: SuccessFlag -> SuccessFlag -> IORef HscEnv -> HscEnv -> IO SuccessFlag
+loadFinish _all_ok Failed ref hsc_env
= do unload hsc_env []
writeIORef ref $! discardProg hsc_env
return Failed
-- used to fish out the preprocess output files for the purposes of
-- cleaning up. The preprocessed file *might* be the same as the
-- source file, but that doesn't do any harm.
+ppFilesFromSummaries :: [ModSummary] -> [FilePath]
ppFilesFromSummaries summaries = map ms_hspp_file summaries
-- -----------------------------------------------------------------------------
CheckedModule { parsedSource :: ParsedSource,
renamedSource :: Maybe RenamedSource,
typecheckedSource :: Maybe TypecheckedSource,
- checkedModuleInfo :: Maybe ModuleInfo
+ checkedModuleInfo :: Maybe ModuleInfo,
+ coreBinds :: Maybe [CoreBind]
}
-- ToDo: improvements that could be made here:
-- if the module succeeded renaming but not typechecking,
-- | This is the way to get access to parsed and typechecked source code
--- for a module. 'checkModule' loads all the dependencies of the specified
--- module in the Session, and then attempts to typecheck the module. If
+-- for a module. 'checkModule' attempts to typecheck the module. If
-- successful, it returns the abstract syntax for the module.
-checkModule :: Session -> ModuleName -> IO (Maybe CheckedModule)
-checkModule session@(Session ref) mod = do
- -- load up the dependencies first
- r <- load session (LoadDependenciesOf mod)
- if (failed r) then return Nothing else do
-
- -- now parse & typecheck the module
+-- If compileToCore is true, it also desugars the module and returns the
+-- resulting Core bindings as a component of the CheckedModule.
+checkModule :: Session -> ModuleName -> Bool -> IO (Maybe CheckedModule)
+checkModule (Session ref) mod compileToCore = do
+ -- parse & typecheck the module
hsc_env <- readIORef ref
let mg = hsc_mod_graph hsc_env
case [ ms | ms <- mg, ms_mod_name ms == mod ] of
[] -> return Nothing
(ms:_) -> do
- mbChecked <- hscFileCheck hsc_env{hsc_dflags=ms_hspp_opts ms} ms
+ mbChecked <- hscFileCheck
+ hsc_env{hsc_dflags=ms_hspp_opts ms}
+ ms compileToCore
case mbChecked of
Nothing -> return Nothing
- Just (HscChecked parsed renamed Nothing) ->
+ Just (HscChecked parsed renamed Nothing _) ->
return (Just (CheckedModule {
parsedSource = parsed,
renamedSource = renamed,
typecheckedSource = Nothing,
- checkedModuleInfo = Nothing }))
+ checkedModuleInfo = Nothing,
+ coreBinds = Nothing }))
Just (HscChecked parsed renamed
- (Just (tc_binds, rdr_env, details))) -> do
+ (Just (tc_binds, rdr_env, details))
+ maybeCoreBinds) -> do
let minf = ModuleInfo {
minf_type_env = md_types details,
minf_exports = availsToNameSet $
parsedSource = parsed,
renamedSource = renamed,
typecheckedSource = Just tc_binds,
- checkedModuleInfo = Just minf }))
-
--- ---------------------------------------------------------------------------
+ checkedModuleInfo = Just minf,
+ coreBinds = maybeCoreBinds}))
+
+-- | This is the way to get access to the Core bindings corresponding
+-- to a module. 'compileToCore' invokes 'checkModule' to parse, typecheck, and
+-- desugar the module, then returns the resulting list of Core bindings if
+-- successful.
+compileToCore :: Session -> FilePath -> IO (Maybe [CoreBind])
+compileToCore session fn = do
+ -- First, set the target to the desired filename
+ target <- guessTarget fn Nothing
+ addTarget session target
+ load session LoadAllTargets
+ -- Then find dependencies
+ maybeModGraph <- depanal session [] True
+ case maybeModGraph of
+ Nothing -> return Nothing
+ Just modGraph -> do
+ let modSummary = expectJust "compileToCore" $
+ find ((== fn) . msHsFilePath) modGraph
+ -- Now we have the module name;
+ -- parse, typecheck and desugar the module
+ let mod = ms_mod_name modSummary
+ maybeCheckedModule <- checkModule session mod True
+ case maybeCheckedModule of
+ Nothing -> return Nothing
+ Just checkedMod -> return $ coreBinds checkedMod
+ -- ---------------------------------------------------------------------------
-- Unloading
unload :: HscEnv -> [Linkable] -> IO ()
LinkInMemory -> Linker.unload (hsc_dflags hsc_env) stable_linkables
#else
LinkInMemory -> panic "unload: no interpreter"
+ -- urgh. avoid warnings:
+ hsc_env stable_linkables
#endif
- other -> return ()
+ _other -> return ()
-- -----------------------------------------------------------------------------
-- checkStability
= chew theGraph
where
chew [] = []
- chew ((AcyclicSCC v):rest) = chew rest -- acyclic? not interesting.
+ chew ((AcyclicSCC _):rest) = chew rest -- acyclic? not interesting.
chew ((CyclicSCC vs):rest)
= let names_in_this_cycle = nub (map ms_mod vs)
mods_in_this_cycle
upsweep hsc_env old_hpt stable_mods cleanup mods
= upsweep' hsc_env old_hpt stable_mods cleanup mods 1 (length mods)
+ where
-upsweep' hsc_env old_hpt stable_mods cleanup
+ upsweep' hsc_env _old_hpt _stable_mods _cleanup
[] _ _
= return (Succeeded, hsc_env, [])
-upsweep' hsc_env old_hpt stable_mods cleanup
+ upsweep' hsc_env _old_hpt _stable_mods _cleanup
(CyclicSCC ms:_) _ _
= do fatalErrorMsg (hsc_dflags hsc_env) (cyclicModuleErr ms)
return (Failed, hsc_env, [])
-upsweep' hsc_env old_hpt stable_mods cleanup
+ upsweep' hsc_env old_hpt stable_mods cleanup
(AcyclicSCC mod:mods) mod_index nmods
= do -- putStrLn ("UPSWEEP_MOD: hpt = " ++
-- show (map (moduleUserString.moduleName.mi_module.hm_iface)
iface = hm_iface hm_info
compile_it :: Maybe Linkable -> IO (Maybe HomeModInfo)
- compile_it = upsweep_compile hsc_env old_hpt this_mod_name
+ compile_it = upsweep_compile hsc_env
summary' mod_index nmods mb_old_iface
compile_it_discard_iface
- = upsweep_compile hsc_env old_hpt this_mod_name
+ = upsweep_compile hsc_env
summary' mod_index nmods Nothing
in
-- Run hsc to compile a module
-upsweep_compile hsc_env old_hpt this_mod summary
- mod_index nmods
- mb_old_iface
- mb_old_linkable
+upsweep_compile :: HscEnv -> ModSummary -> Int -> Int
+ -> Maybe ModIface -> Maybe Linkable -> IO (Maybe HomeModInfo)
+upsweep_compile hsc_env summary mod_index nmods mb_old_iface mb_old_linkable
= do
compresult <- compile hsc_env summary mb_old_linkable mb_old_iface
mod_index nmods
nodeMapElts :: NodeMap a -> [a]
nodeMapElts = eltsFM
-ms_mod_name :: ModSummary -> ModuleName
-ms_mod_name = moduleName . ms_mod
-
-- If there are {-# SOURCE #-} imports between strongly connected
-- components in the topological sort, then those imports can
-- definitely be replaced by ordinary non-SOURCE imports: if SOURCE
printBagOfWarnings dflags (listToBag (concat (map (check.flattenSCC) sccs)))
where check ms =
let mods_in_this_cycle = map ms_mod_name ms in
- [ warn m i | m <- ms, i <- ms_srcimps m,
+ [ warn i | m <- ms, i <- ms_srcimps m,
unLoc i `notElem` mods_in_this_cycle ]
- warn :: ModSummary -> Located ModuleName -> WarnMsg
- warn ms (L loc mod) =
+ warn :: Located ModuleName -> WarnMsg
+ warn (L loc mod) =
mkPlainErrMsg loc
(ptext SLIT("Warning: {-# SOURCE #-} unnecessary in import of ")
<+> quotes (ppr mod))
= case [ ms | ms <- summaries, HsSrcFile <- [ms_hsc_src ms],
expectJust "findSummaryBySourceFile" (ml_hs_file (ms_location ms)) == file ] of
[] -> Nothing
- (x:xs) -> Just x
+ (x:_) -> Just x
-- Summarise a module, and pick up source and timestamp.
summariseModule
ms_obj_date = obj_timestamp }))
+getObjTimestamp :: ModLocation -> Bool -> IO (Maybe ClockTime)
getObjTimestamp location is_boot
= if is_boot then return Nothing
else modificationTimeIfExists (ml_obj_file location)
buf <- hGetStringBuffer hspp_fn
return (dflags', hspp_fn, buf)
-preprocessFile dflags src_fn mb_phase (Just (buf, time))
+preprocessFile dflags src_fn mb_phase (Just (buf, _time))
= do
-- case we bypass the preprocessing stage?
let
local_opts = getOptions buf src_fn
--
- (dflags', errs) <- parseDynamicFlags dflags (map unLoc local_opts)
+ (dflags', _errs) <- parseDynamicFlags dflags (map unLoc local_opts)
+ -- XXX: shouldn't we be reporting the errors?
let
needs_preprocessing
noModError dflags loc wanted_mod err
= throwDyn $ mkPlainErrMsg loc $ cannotFindModule dflags wanted_mod err
+noHsFileErr :: SrcSpan -> String -> a
noHsFileErr loc path
= throwDyn $ mkPlainErrMsg loc $ text "Can't find" <+> text path
+packageModErr :: ModuleName -> a
packageModErr mod
= throwDyn $ mkPlainErrMsg noSrcSpan $
text "module" <+> quotes (ppr mod) <+> text "is a package module"
multiRootsErr :: [ModSummary] -> IO ()
+multiRootsErr [] = panic "multiRootsErr"
multiRootsErr summs@(summ1:_)
= throwDyn $ mkPlainErrMsg noSrcSpan $
text "module" <+> quotes (ppr mod) <+>
return $! isJust (lookupUFM (hsc_HPT hsc_env) m)
getBindings :: Session -> IO [TyThing]
-getBindings s = withSession s (return . nameEnvElts . ic_type_env . hsc_IC)
+getBindings s = withSession s $ \hsc_env ->
+ -- we have to implement the shadowing behaviour of ic_tmp_ids here
+ -- (see InteractiveContext) and the quickest way is to use an OccEnv.
+ let
+ tmp_ids = ic_tmp_ids (hsc_IC hsc_env)
+ filtered = foldr f (const []) tmp_ids emptyUniqSet
+ f id rest set
+ | uniq `elementOfUniqSet` set = rest set
+ | otherwise = AnId id : rest (addOneToUniqSet set uniq)
+ where uniq = getUnique (nameOccName (idName id))
+ in
+ return filtered
getPrintUnqual :: Session -> IO PrintUnqualified
-getPrintUnqual s = withSession s (return . icPrintUnqual . hsc_IC)
+getPrintUnqual s = withSession s $ \hsc_env ->
+ return (icPrintUnqual (hsc_dflags hsc_env) (hsc_IC hsc_env))
-- | Container for information about a 'Module'.
data ModuleInfo = ModuleInfo {
-- exist... hence the isHomeModule test here. (ToDo: reinstate)
getPackageModuleInfo :: HscEnv -> Module -> IO (Maybe ModuleInfo)
-getPackageModuleInfo hsc_env mdl = do
#ifdef GHCI
+getPackageModuleInfo hsc_env mdl = do
(_msgs, mb_avails) <- getModuleExports hsc_env mdl
case mb_avails of
Nothing -> return Nothing
minf_modBreaks = emptyModBreaks
}))
#else
+getPackageModuleInfo _hsc_env _mdl = do
-- bogusly different for non-GHCI (ToDo)
return Nothing
#endif
+getHomeModuleInfo :: HscEnv -> ModuleName -> IO (Maybe ModuleInfo)
getHomeModuleInfo hsc_env mdl =
case lookupUFM (hsc_HPT hsc_env) mdl of
Nothing -> return Nothing
minf_rdr_env = mi_globals $! hm_iface hmi,
minf_instances = md_insts details
#ifdef GHCI
- ,minf_modBreaks = md_modBreaks details
+ ,minf_modBreaks = getModBreaks hmi
#endif
}))
modInfoIsExportedName :: ModuleInfo -> Name -> Bool
modInfoIsExportedName minf name = elemNameSet name (minf_exports minf)
-modInfoPrintUnqualified :: ModuleInfo -> Maybe PrintUnqualified
-modInfoPrintUnqualified minf = fmap mkPrintUnqualified (minf_rdr_env minf)
+mkPrintUnqualifiedForModule :: Session -> ModuleInfo -> IO (Maybe PrintUnqualified)
+mkPrintUnqualifiedForModule s minf = withSession s $ \hsc_env -> do
+ return (fmap (mkPrintUnqualified (hsc_dflags hsc_env)) (minf_rdr_env minf))
modInfoLookupName :: Session -> ModuleInfo -> Name -> IO (Maybe TyThing)
modInfoLookupName s minf name = withSession s $ \hsc_env -> do
(hsc_HPT hsc_env) (eps_PTE eps) name
#ifdef GHCI
+modInfoModBreaks :: ModuleInfo -> ModBreaks
modInfoModBreaks = minf_modBreaks
#endif
isDictonaryId :: Id -> Bool
isDictonaryId id
- = case tcSplitSigmaTy (idType id) of { (tvs, theta, tau) -> isDictTy tau }
+ = case tcSplitSigmaTy (idType id) of { (_tvs, _theta, tau) -> isDictTy tau }
-- | Looks up a global name: that is, any top-level name in any
-- visible module. Unlike 'lookupName', lookupGlobalName does not use
-- using the algorithm that is used for an @import@ declaration.
findModule :: Session -> ModuleName -> Maybe PackageId -> IO Module
findModule s mod_name maybe_pkg = withSession s $ \hsc_env ->
- findModule' hsc_env mod_name maybe_pkg
-
-findModule' hsc_env mod_name maybe_pkg =
let
dflags = hsc_dflags hsc_env
hpt = hsc_HPT hsc_env
throwDyn (CmdLineError (showSDoc msg))
#ifdef GHCI
+getHistorySpan :: Session -> History -> IO SrcSpan
+getHistorySpan sess h = withSession sess $ \hsc_env ->
+ return$ InteractiveEval.getHistorySpan hsc_env h
--- | Set the interactive evaluation context.
---
--- Setting the context doesn't throw away any bindings; the bindings
--- we've built up in the InteractiveContext simply move to the new
--- module. They always shadow anything in scope in the current context.
-setContext :: Session
- -> [Module] -- entire top level scope of these modules
- -> [Module] -- exports only of these modules
- -> IO ()
-setContext sess@(Session ref) toplev_mods export_mods = do
- hsc_env <- readIORef ref
- let old_ic = hsc_IC hsc_env
- hpt = hsc_HPT hsc_env
- --
- export_env <- mkExportEnv hsc_env export_mods
- toplev_envs <- mapM (mkTopLevEnv hpt) toplev_mods
- let all_env = foldr plusGlobalRdrEnv export_env toplev_envs
- writeIORef ref hsc_env{ hsc_IC = old_ic { ic_toplev_scope = toplev_mods,
- ic_exports = export_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_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}]
- where
- decl = ImpDeclSpec { is_mod = mod_name, is_as = mod_name,
- is_qual = False,
- is_dloc = srcLocSpan interactiveSrcLoc }
-
-mkTopLevEnv :: HomePackageTable -> Module -> IO GlobalRdrEnv
-mkTopLevEnv hpt modl
- = case lookupUFM hpt (moduleName modl) of
- Nothing -> throwDyn (ProgramError ("mkTopLevEnv: not a home module " ++
- showSDoc (ppr modl)))
- Just details ->
- case mi_globals (hm_iface details) of
- Nothing ->
- throwDyn (ProgramError ("mkTopLevEnv: not interpreted "
- ++ showSDoc (ppr modl)))
- Just env -> return env
-
--- | 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 :: Session -> IO ([Module],[Module])
-getContext s = withSession s (\HscEnv{ hsc_IC=ic } ->
- return (ic_toplev_scope ic, ic_exports ic))
-
--- | Returns 'True' if the specified module is interpreted, and hence has
--- its full top-level scope available.
-moduleIsInterpreted :: Session -> Module -> IO Bool
-moduleIsInterpreted s modl = withSession s $ \h ->
- if modulePackageId modl /= thisPackage (hsc_dflags h)
- then return False
- else case lookupUFM (hsc_HPT h) (moduleName modl) of
- Just details -> return (isJust (mi_globals (hm_iface details)))
- _not_a_home_module -> return False
-
--- | Looks up an identifier in the current interactive context (for :info)
-getInfo :: Session -> Name -> IO (Maybe (TyThing,Fixity,[Instance]))
-getInfo s name = withSession s $ \hsc_env -> tcRnGetInfo hsc_env name
-
--- | Returns all names in scope in the current interactive context
-getNamesInScope :: Session -> IO [Name]
-getNamesInScope s = withSession s $ \hsc_env -> do
- return (map gre_name (globalRdrEnvElts (ic_rn_gbl_env (hsc_IC hsc_env))))
-
-getRdrNamesInScope :: Session -> IO [RdrName]
-getRdrNamesInScope s = withSession s $ \hsc_env -> do
- let env = ic_rn_gbl_env (hsc_IC hsc_env)
- return (concat (map greToRdrNames (globalRdrEnvElts env)))
-
--- ToDo: move to RdrName
-greToRdrNames :: GlobalRdrElt -> [RdrName]
-greToRdrNames GRE{ gre_name = name, gre_prov = prov }
- = case prov of
- LocalDef -> [unqual]
- Imported specs -> concat (map do_spec (map is_decl specs))
- where
- occ = nameOccName name
- unqual = Unqual occ
- do_spec decl_spec
- | is_qual decl_spec = [qual]
- | otherwise = [unqual,qual]
- where qual = Qual (is_as decl_spec) occ
-
--- | Parses a string as an identifier, and returns the list of 'Name's that
--- the identifier can refer to in the current interactive context.
-parseName :: Session -> String -> IO [Name]
-parseName s str = withSession s $ \hsc_env -> do
- maybe_rdr_name <- hscParseIdentifier (hsc_dflags hsc_env) str
- case maybe_rdr_name of
- Nothing -> return []
- Just (L _ rdr_name) -> do
- mb_names <- tcRnLookupRdrName hsc_env rdr_name
- case mb_names of
- Nothing -> return []
- Just ns -> return ns
- -- ToDo: should return error messages
-
--- | Returns the 'TyThing' for a 'Name'. The 'Name' may refer to any
--- entity known to GHC, including 'Name's defined using 'runStmt'.
-lookupName :: Session -> Name -> IO (Maybe TyThing)
-lookupName s name = withSession s $ \hsc_env -> tcRnLookupName hsc_env name
-
--- -----------------------------------------------------------------------------
--- Getting the type of an expression
-
--- | Get the type of an expression
-exprType :: Session -> String -> IO (Maybe Type)
-exprType s expr = withSession s $ \hsc_env -> do
- maybe_stuff <- hscTcExpr hsc_env expr
- case maybe_stuff of
- Nothing -> return Nothing
- Just ty -> return (Just tidy_ty)
- where
- tidy_ty = tidyType emptyTidyEnv ty
-
--- -----------------------------------------------------------------------------
--- Getting the kind of a type
-
--- | Get the kind of a type
-typeKind :: Session -> String -> IO (Maybe Kind)
-typeKind s str = withSession s $ \hsc_env -> do
- maybe_stuff <- hscKcType hsc_env str
- case maybe_stuff of
- Nothing -> return Nothing
- Just kind -> return (Just kind)
-
------------------------------------------------------------------------------
--- cmCompileExpr: compile an expression and deliver an HValue
-
-compileExpr :: Session -> String -> IO (Maybe HValue)
-compileExpr s expr = withSession s $ \hsc_env -> do
- maybe_stuff <- hscStmt hsc_env ("let __cmCompileExpr = "++expr)
- case maybe_stuff of
- Nothing -> return Nothing
- Just (new_ic, names, hval) -> do
- -- Run it!
- hvals <- (unsafeCoerce# hval) :: IO [HValue]
-
- case (names,hvals) of
- ([n],[hv]) -> return (Just hv)
- _ -> panic "compileExpr"
-
--- -----------------------------------------------------------------------------
--- Compile an expression into a dynamic
-
-dynCompileExpr :: Session -> String -> IO (Maybe Dynamic)
-dynCompileExpr ses expr = do
- (full,exports) <- getContext ses
- setContext ses full $
- (mkModule
- (stringToPackageId "base") (mkModuleName "Data.Dynamic")
- ):exports
- let stmt = "let __dynCompileExpr = Data.Dynamic.toDyn (" ++ expr ++ ")"
- res <- withSession ses (flip hscStmt stmt)
- setContext ses full exports
- case res of
- Nothing -> return Nothing
- Just (_, names, hvals) -> do
- vals <- (unsafeCoerce# hvals :: IO [Dynamic])
- case (names,vals) of
- (_:[], v:[]) -> return (Just v)
- _ -> panic "dynCompileExpr"
-
--- -----------------------------------------------------------------------------
--- running a statement interactively
-
-data RunResult
- = RunOk [Name] -- ^ names bound by this evaluation
- | RunFailed -- ^ statement failed compilation
- | RunException Exception -- ^ statement raised an exception
- | RunBreak ThreadId [Name] BreakInfo ResumeHandle
-
-data Status
- = Break HValue BreakInfo ThreadId ResumeHandle -- ^ the computation hit a breakpoint
- | Complete (Either Exception [HValue]) -- ^ the computation completed with either an exception or a value
-
-data ResumeHandle = ResumeHandle (MVar ()) (MVar Status) [Name]
-
--- | Run a statement in the current interactive context. Statement
--- may bind multple values.
-runStmt :: Session -> String -> IO RunResult
-runStmt (Session ref) expr
- = do
- hsc_env <- readIORef ref
-
- breakMVar <- newEmptyMVar -- wait on this when we hit a breakpoint
- statusMVar <- newEmptyMVar -- wait on this when a computation is running
-
- -- Turn off -fwarn-unused-bindings when running a statement, to hide
- -- warnings about the implicit bindings we introduce.
- let dflags' = dopt_unset (hsc_dflags hsc_env) Opt_WarnUnusedBinds
- hsc_env' = hsc_env{ hsc_dflags = dflags' }
-
- maybe_stuff <- hscStmt hsc_env' expr
-
- case maybe_stuff of
- Nothing -> return RunFailed
- Just (new_hsc_env, names, hval) -> do
- writeIORef ref new_hsc_env
-
- let resume_handle = ResumeHandle breakMVar statusMVar names
- -- set the onBreakAction to be performed when we hit a
- -- breakpoint this is visible in the Byte Code
- -- Interpreter, thus it is a global variable,
- -- implemented with stable pointers
- stablePtr <- setBreakAction resume_handle
-
- let thing_to_run = unsafeCoerce# hval :: IO [HValue]
- status <- sandboxIO statusMVar thing_to_run
- freeStablePtr stablePtr -- be careful not to leak stable pointers!
- handleRunStatus ref names status
-
-handleRunStatus ref names status =
- case status of
- -- did we hit a breakpoint or did we complete?
- (Break apStack info tid res) -> do
- hsc_env <- readIORef ref
- (new_hsc_env, names) <- extendEnvironment hsc_env apStack
- (breakInfo_vars info)
- writeIORef ref new_hsc_env
- return (RunBreak tid names info res)
- (Complete either_hvals) ->
- case either_hvals of
- Left e -> return (RunException e)
- Right hvals -> do
- extendLinkEnv (zip names hvals)
- return (RunOk names)
-
--- this points to the IO action that is executed when a breakpoint is hit
-foreign import ccall "&breakPointIOAction"
- breakPointIOAction :: Ptr (StablePtr (BreakInfo -> HValue -> IO ()))
-
--- When running a computation, we redirect ^C exceptions to the running
--- thread. ToDo: we might want a way to continue even if the target
--- thread doesn't die when it receives the exception... "this thread
--- is not responding".
-sandboxIO :: MVar Status -> IO [HValue] -> IO Status
-sandboxIO statusMVar thing = do
- ts <- takeMVar interruptTargetThread
- child <- forkIO (do res <- Exception.try thing; putMVar statusMVar (Complete res))
- putMVar interruptTargetThread (child:ts)
- takeMVar statusMVar `finally` modifyMVar_ interruptTargetThread (return.tail)
-
-setBreakAction res@(ResumeHandle breakMVar statusMVar names) = do
- stablePtr <- newStablePtr onBreak
- poke breakPointIOAction stablePtr
- return stablePtr
- where onBreak ids apStack = do
- tid <- myThreadId
- putMVar statusMVar (Break apStack ids tid res)
- takeMVar breakMVar
-
-resume :: Session -> ResumeHandle -> IO RunResult
-resume (Session ref) res@(ResumeHandle breakMVar statusMVar names) = do
- stablePtr <- setBreakAction res
- putMVar breakMVar ()
- status <- takeMVar statusMVar
- handleRunStatus ref names status
-
-{-
--- This version of sandboxIO runs the expression in a completely new
--- RTS main thread. It is disabled for now because ^C exceptions
--- won't be delivered to the new thread, instead they'll be delivered
--- to the (blocked) GHCi main thread.
-
--- SLPJ: when re-enabling this, reflect a wrong-stat error as an exception
-
-sandboxIO :: IO a -> IO (Either Int (Either Exception a))
-sandboxIO thing = do
- st_thing <- newStablePtr (Exception.try thing)
- alloca $ \ p_st_result -> do
- stat <- rts_evalStableIO st_thing p_st_result
- freeStablePtr st_thing
- if stat == 1
- then do st_result <- peek p_st_result
- result <- deRefStablePtr st_result
- freeStablePtr st_result
- return (Right result)
- else do
- return (Left (fromIntegral stat))
-
-foreign import "rts_evalStableIO" {- safe -}
- rts_evalStableIO :: StablePtr (IO a) -> Ptr (StablePtr a) -> IO CInt
- -- more informative than the C type!
-
-XXX the type of rts_evalStableIO no longer matches the above
-
--}
-
--- -----------------------------------------------------------------------------
--- After stopping at a breakpoint, add free variables to the environment
-
--- Todo: turn this into a primop, and provide special version(s) for unboxed things
-foreign import ccall "rts_getApStackVal" getApStackVal :: StablePtr a -> Int -> IO (StablePtr b)
-
-getIdValFromApStack :: a -> (Id, Int) -> IO (Id, HValue)
-getIdValFromApStack apStack (identifier, stackDepth) = do
- -- ToDo: check the type of the identifer and decide whether it is unboxed or not
- apSptr <- newStablePtr apStack
- resultSptr <- getApStackVal apSptr (stackDepth - 1)
- result <- deRefStablePtr resultSptr
- freeStablePtr apSptr
- freeStablePtr resultSptr
- return (identifier, unsafeCoerce# result)
-
-extendEnvironment :: HscEnv -> a -> [(Id, Int)] -> IO (HscEnv, [Name])
-extendEnvironment hsc_env apStack idsOffsets = do
- idsVals <- mapM (getIdValFromApStack apStack) idsOffsets
- let (ids, hValues) = unzip idsVals
- let names = map idName ids
- let global_ids = map globaliseAndTidy ids
- typed_ids <- mapM instantiateIdType global_ids
- let ictxt = hsc_IC hsc_env
- rn_env = ic_rn_local_env ictxt
- type_env = ic_type_env ictxt
- bound_names = map idName typed_ids
- new_rn_env = extendLocalRdrEnv rn_env bound_names
- -- Remove any shadowed bindings from the type_env;
- -- they are inaccessible but might, I suppose, cause
- -- a space leak if we leave them there
- shadowed = [ n | name <- bound_names,
- let rdr_name = mkRdrUnqual (nameOccName name),
- Just n <- [lookupLocalRdrEnv rn_env rdr_name] ]
- filtered_type_env = delListFromNameEnv type_env shadowed
- new_type_env = extendTypeEnvWithIds filtered_type_env (typed_ids)
- new_ic = ictxt { ic_rn_local_env = new_rn_env,
- ic_type_env = new_type_env }
- extendLinkEnv (zip names hValues) -- ToDo: we must remember to restore the old env after we finish a breakpoint
- return (hsc_env{hsc_IC = new_ic}, names)
- where
- globaliseAndTidy :: Id -> Id
- globaliseAndTidy id
- = let tidied_type = tidyTopType$ idType id
- in setIdType (globaliseId VanillaGlobal id) tidied_type
-
- -- | Instantiate the tyVars with GHC.Base.Unknown
- instantiateIdType :: Id -> IO Id
- instantiateIdType id = do
- instantiatedType <- instantiateTyVarsToUnknown hsc_env (idType id)
- return$ setIdType id instantiatedType
-
------------------------------------------------------------------------------
--- show a module and it's source/object filenames
-
-showModule :: Session -> ModSummary -> IO String
-showModule s mod_summary = withSession s $ \hsc_env ->
- isModuleInterpreted s mod_summary >>= \interpreted ->
- return (showModMsg (hscTarget(hsc_dflags hsc_env)) interpreted mod_summary)
-
-isModuleInterpreted :: Session -> ModSummary -> IO Bool
-isModuleInterpreted s mod_summary = withSession s $ \hsc_env ->
- case lookupUFM (hsc_HPT hsc_env) (ms_mod_name mod_summary) of
- Nothing -> panic "missing linkable"
- Just mod_info -> return (not obj_linkable)
- where
- obj_linkable = isObjectLinkable (expectJust "showModule" (hm_linkable mod_info))
+obtainTerm :: Session -> Bool -> Id -> IO Term
+obtainTerm sess force id = withSession sess $ \hsc_env ->
+ InteractiveEval.obtainTerm hsc_env force id
obtainTerm1 :: Session -> Bool -> Maybe Type -> a -> IO Term
-obtainTerm1 sess force mb_ty x = withSession sess $ \hsc_env -> cvObtainTerm hsc_env force mb_ty (unsafeCoerce# x)
+obtainTerm1 sess force mb_ty a = withSession sess $ \hsc_env ->
+ InteractiveEval.obtainTerm1 hsc_env force mb_ty a
-obtainTerm :: Session -> Bool -> Id -> IO (Maybe Term)
-obtainTerm sess force id = withSession sess $ \hsc_env -> do
- mb_v <- getHValue (varName id)
- case mb_v of
- Just v -> fmap Just$ cvObtainTerm hsc_env force (Just$ idType id) v
- Nothing -> return Nothing
+obtainTermB :: Session -> Int -> Bool -> Id -> IO Term
+obtainTermB sess bound force id = withSession sess $ \hsc_env ->
+ InteractiveEval.obtainTermB hsc_env bound force id
-#endif /* GHCI */
+#endif
projects / ghc-hetmet.git / blobdiff