\begin{code}
module CompManager ( cmInit, cmLoadModule,
- cmGetExpr, cmRunExpr,
+#ifdef GHCI
+ cmGetExpr, cmTypeExpr, cmRunExpr,
+#endif
CmState, emptyCmState -- abstract
)
where
import CmLink
import CmTypes
import HscTypes
-import HscMain ( hscExpr )
-import Interpreter ( HValue )
import Module ( ModuleName, moduleName,
- isModuleInThisPackage, moduleEnvElts,
+ isHomeModule, moduleEnvElts,
moduleNameUserString )
import CmStaticInfo ( PackageConfigInfo, GhciMode(..) )
import DriverPipeline
import GetImports
import HscTypes ( HomeSymbolTable, HomeIfaceTable,
PersistentCompilerState, ModDetails(..) )
+import Type ( Type )
import Name ( lookupNameEnv )
-import RdrName
import Module
import PrelNames ( mainName )
import HscMain ( initPersistentCompilerState )
-import Finder ( findModule, emptyHomeDirCache )
+import Finder
import UniqFM ( emptyUFM, lookupUFM, addToUFM, delListFromUFM,
UniqFM, listToUFM )
import Unique ( Uniquable )
import Digraph ( SCC(..), stronglyConnComp )
+import DriverFlags ( getDynFlags )
+import DriverPhases
import DriverUtil ( BarfKind(..), splitFilename3 )
-import CmdLineOpts ( DynFlags )
+import ErrUtils ( showPass )
import Util
import Outputable
import Panic ( panic )
+#ifdef GHCI
+import CmdLineOpts ( DynFlags(..) )
+import Interpreter ( HValue )
+import HscMain ( hscExpr, hscTypeExpr )
+import RdrName
+import PrelGHC ( unsafeCoerce# )
+#endif
+
-- lang
import Exception ( throwDyn )
import Time ( ClockTime )
import Directory ( getModificationTime, doesFileExist )
import IO
+import Monad
import List ( nub )
import Maybe ( catMaybes, fromMaybe, isJust )
-
-import PrelGHC ( unsafeCoerce# )
\end{code}
cmInit raw_package_info gmode
= emptyCmState raw_package_info gmode
+#ifdef GHCI
cmGetExpr :: CmState
-> DynFlags
-> ModuleName
-> IO (CmState, Maybe HValue)
cmGetExpr cmstate dflags modname expr
= do (new_pcs, maybe_unlinked_iexpr) <-
- hscExpr dflags hst hit pcs (mkModuleInThisPackage modname) expr
+ hscExpr dflags hst hit pcs (mkHomeModule modname) expr
case maybe_unlinked_iexpr of
Nothing -> return (cmstate{ pcs=new_pcs }, Nothing)
Just uiexpr -> do
CmState{ pcs=pcs, pcms=pcms, pls=pls } = cmstate
PersistentCMState{ hst=hst, hit=hit } = pcms
+cmTypeExpr :: CmState
+ -> DynFlags
+ -> ModuleName
+ -> String
+ -> IO (CmState, Maybe Type)
+cmTypeExpr cmstate dflags modname expr
+ = do (new_pcs, expr_type) <-
+ hscTypeExpr dflags hst hit pcs (mkHomeModule modname) expr
+ return (cmstate{ pcs=new_pcs }, expr_type)
+ where
+ CmState{ pcs=pcs, pcms=pcms, pls=pls } = cmstate
+ PersistentCMState{ hst=hst, hit=hit } = pcms
+
-- The HValue should represent a value of type IO () (Perhaps IO a?)
cmRunExpr :: HValue -> IO ()
cmRunExpr hval
= do unsafeCoerce# hval :: IO ()
-- putStrLn "done."
+#endif
-- Persistent state just for CM, excluding link & compile subsystems
data PersistentCMState
\begin{code}
cmLoadModule :: CmState
- -> ModuleName
- -> IO (CmState, Maybe ModuleName)
+ -> FilePath
+ -> IO (CmState, -- new state
+ Bool, -- was successful
+ [ModuleName]) -- list of modules loaded
cmLoadModule cmstate1 rootname
= do -- version 1's are the original, before downsweep
let pcii = pci pcms1 -- this never changes
let ghci_mode = gmode pcms1 -- ToDo: fix!
- -- During upsweep, look at new summaries to see if source has
- -- changed. Here's a function to pass down; it takes a new
- -- summary.
- let source_changed :: ModSummary -> Bool
- source_changed = summary_indicates_source_changed mg1
-
-- Do the downsweep to reestablish the module graph
-- then generate version 2's by removing from HIT,HST,UI any
-- modules in the old MG which are not in the new one.
-- Throw away the old home dir cache
emptyHomeDirCache
- hPutStr stderr "cmLoadModule: downsweep begins\n"
+ dflags <- getDynFlags
+ let verb = verbosity dflags
+
+ showPass dflags "Chasing dependencies"
+
mg2unsorted <- downsweep [rootname]
let modnames1 = map name_of_summary mg1
let reachable_from :: ModuleName -> [ModuleName]
reachable_from = downwards_closure_of_module mg2unsorted
- hPutStrLn stderr "after tsort:\n"
- hPutStrLn stderr (showSDoc (vcat (map ppr mg2)))
+ --hPutStrLn stderr "after tsort:\n"
+ --hPutStrLn stderr (showSDoc (vcat (map ppr mg2)))
-- Because we don't take into account source imports when doing
-- the topological sort, there shouldn't be any cycles in mg2.
let threaded2 = CmThreaded pcs1 hst2 hit2
(upsweep_complete_success, threaded3, modsDone, newLis)
- <- upsweep_mods ghci_mode ui2 reachable_from source_changed threaded2 mg2
+ <- upsweep_mods ghci_mode ui2 reachable_from threaded2 mg2
let ui3 = add_to_ui ui2 newLis
let (CmThreaded pcs3 hst3 hit3) = threaded3
then
-- Easy; just relink it all.
- do hPutStrLn stderr "UPSWEEP COMPLETELY SUCCESSFUL"
+ do when (verb >= 2) $
+ hPutStrLn stderr "Upsweep completely successful."
linkresult
- <- link ghci_mode (any exports_main (moduleEnvElts hst3))
- newLis pls1
+ <- link ghci_mode dflags
+ (any exports_main (moduleEnvElts hst3))
+ newLis pls1
case linkresult of
LinkErrs _ _
-> panic "cmLoadModule: link failed (1)"
pci=pcii, gmode=ghci_mode }
let cmstate3
= CmState { pcms=pcms3, pcs=pcs3, pls=pls3 }
- return (cmstate3, Just rootname)
+ return (cmstate3, True, map name_of_summary modsDone)
else
-- Tricky. We need to back out the effects of compiling any
-- half-done cycles, both so as to clean up the top level envs
-- and to avoid telling the interactive linker to link them.
- do hPutStrLn stderr "UPSWEEP PARTIALLY SUCCESSFUL"
+ do when (verb >= 2) $
+ hPutStrLn stderr "Upsweep partially successful."
let modsDone_names
= map name_of_summary modsDone
-- we could get the relevant linkables by filtering newLis, but
-- it seems easier to drag them out of the updated, cleaned-up UI
let linkables_to_link
- = map (findModuleLinkable ui4) mods_to_keep_names
+ = map (unJust "linkables_to_link" . findModuleLinkable_maybe ui4)
+ mods_to_keep_names
- linkresult <- link ghci_mode False linkables_to_link pls1
+ linkresult <- link ghci_mode dflags False linkables_to_link pls1
case linkresult of
LinkErrs _ _
-> panic "cmLoadModule: link failed (2)"
pci=pcii, gmode=ghci_mode }
let cmstate4
= CmState { pcms=pcms4, pcs=pcs3, pls=pls4 }
- return (cmstate4,
- -- choose rather arbitrarily who to return
- if null mods_to_keep then Nothing
- else Just (last mods_to_keep_names))
-
-
--- Given a bunch of old summaries and a new summary, try and
--- find the corresponding old summary, and, if found, compare
--- its source timestamp with that of the new summary. If in
--- doubt say True.
-summary_indicates_source_changed :: [ModSummary] -> ModSummary -> Bool
-summary_indicates_source_changed old_summaries new_summary
- = case [old | old <- old_summaries,
- name_of_summary old == name_of_summary new_summary] of
-
- (_:_:_) -> panic "summary_indicates_newer_source"
-
- [] -> -- can't find a corresponding old summary, so
- -- compare source and iface dates in the new summary.
- trace (showSDoc (text "SISC: no old summary, new ="
- <+> pprSummaryTimes new_summary)) (
- case (ms_hs_date new_summary, ms_hi_date new_summary) of
- (Just hs_t, Just hi_t) -> hs_t > hi_t
- other -> True
- )
+ return (cmstate4, False, mods_to_keep_names)
- [old] -> -- found old summary; compare source timestamps
- trace (showSDoc (text "SISC: old ="
- <+> pprSummaryTimes old
- <+> pprSummaryTimes new_summary)) (
- case (ms_hs_date old, ms_hs_date new_summary) of
- (Just old_t, Just new_t) -> new_t > old_t
- other -> True
- )
-- Return (names of) all those in modsDone who are part of a cycle
-- as defined by theGraph.
upsweep_mods :: GhciMode
-> UnlinkedImage -- old linkables
-> (ModuleName -> [ModuleName]) -- to construct downward closures
- -> (ModSummary -> Bool) -- has source changed?
-> CmThreaded -- PCS & HST & HIT
-> [SCC ModSummary] -- mods to do (the worklist)
-- ...... RETURNING ......
[ModSummary], -- mods which succeeded
[Linkable]) -- new linkables
-upsweep_mods ghci_mode oldUI reachable_from source_changed threaded []
+upsweep_mods ghci_mode oldUI reachable_from threaded
+ []
= return (True, threaded, [], [])
-upsweep_mods ghci_mode oldUI reachable_from source_changed threaded ((CyclicSCC ms):_)
- = do hPutStrLn stderr ("ghc: module imports form a cycle for modules:\n\t" ++
+upsweep_mods ghci_mode oldUI reachable_from threaded
+ ((CyclicSCC ms):_)
+ = do hPutStrLn stderr ("Module imports form a cycle for modules:\n\t" ++
unwords (map (moduleNameUserString.name_of_summary) ms))
return (False, threaded, [], [])
-upsweep_mods ghci_mode oldUI reachable_from source_changed threaded ((AcyclicSCC mod):mods)
+upsweep_mods ghci_mode oldUI reachable_from threaded
+ ((AcyclicSCC mod):mods)
= do (threaded1, maybe_linkable)
<- upsweep_mod ghci_mode oldUI threaded mod
(reachable_from (name_of_summary mod))
- (source_changed mod)
case maybe_linkable of
Just linkable
-> -- No errors; do the rest
do (restOK, threaded2, modOKs, linkables)
- <- upsweep_mods ghci_mode oldUI reachable_from source_changed threaded1 mods
+ <- upsweep_mods ghci_mode oldUI reachable_from
+ threaded1 mods
return (restOK, threaded2, mod:modOKs, linkable:linkables)
Nothing -- we got a compilation error; give up now
-> return (False, threaded1, [], [])
-- Compile a single module. Always produce a Linkable for it if
-- successful. If no compilation happened, return the old Linkable.
+maybe_getFileLinkable :: ModuleName -> FilePath -> IO (Maybe Linkable)
+maybe_getFileLinkable mod_name obj_fn
+ = do obj_exist <- doesFileExist obj_fn
+ if not obj_exist
+ then return Nothing
+ else
+ do let stub_fn = case splitFilename3 obj_fn of
+ (dir, base, ext) -> dir ++ "/" ++ base ++ ".stub_o"
+ stub_exist <- doesFileExist stub_fn
+ obj_time <- getModificationTime obj_fn
+ if stub_exist
+ then return (Just (LM obj_time mod_name [DotO obj_fn, DotO stub_fn]))
+ else return (Just (LM obj_time mod_name [DotO obj_fn]))
+
+
upsweep_mod :: GhciMode
-> UnlinkedImage
-> CmThreaded
-> ModSummary
-> [ModuleName]
- -> Bool
-> IO (CmThreaded, Maybe Linkable)
-upsweep_mod ghci_mode oldUI threaded1 summary1
- reachable_from_here source_might_have_changed
- = do let mod_name = name_of_summary summary1
+upsweep_mod ghci_mode oldUI threaded1 summary1 reachable_from_here
+ = do hPutStr stderr ("ghc: module "
+ ++ moduleNameUserString (name_of_summary summary1) ++ ": ")
+ let mod_name = name_of_summary summary1
let (CmThreaded pcs1 hst1 hit1) = threaded1
let old_iface = lookupUFM hit1 (name_of_summary summary1)
b <- doesFileExist obj_fn
return (not b)
- let compilation_might_be_needed
- = source_might_have_changed || compilation_mandatory
+ let maybe_oldUI_linkable = findModuleLinkable_maybe oldUI mod_name
+ maybe_oldDisk_linkable
+ <- case ml_obj_file (ms_location summary1) of
+ Nothing -> return Nothing
+ Just obj_fn -> maybe_getFileLinkable mod_name obj_fn
+
+ -- The most recent of the old UI linkable or whatever we could
+ -- find on disk. Is returned as the linkable if compile
+ -- doesn't think we need to recompile.
+ let maybe_old_linkable
+ = case (maybe_oldUI_linkable, maybe_oldDisk_linkable) of
+ (Nothing, Nothing) -> Nothing
+ (Nothing, Just di) -> Just di
+ (Just ui, Nothing) -> Just ui
+ (Just ui, Just di)
+ | linkableTime ui >= linkableTime di -> Just ui
+ | otherwise -> Just di
+
+ let compilation_mandatory
+ = case maybe_old_linkable of
+ Nothing -> True
+ Just li -> case ms_hs_date summary1 of
+ Nothing -> panic "compilation_mandatory:no src date"
+ Just src_date -> src_date >= linkableTime li
source_unchanged
- = not compilation_might_be_needed
+ = not compilation_mandatory
+
(hst1_strictDC, hit1_strictDC)
= retainInTopLevelEnvs reachable_from_here (hst1,hit1)
+ old_linkable
+ = unJust "upsweep_mod:old_linkable" maybe_old_linkable
+
compresult <- compile ghci_mode summary1 source_unchanged
old_iface hst1_strictDC hit1_strictDC pcs1
- --putStrLn ( "UPSWEEP_MOD: smhc = " ++ show source_might_have_changed
- -- ++ ", cman = " ++ show compilation_mandatory)
-
case compresult of
- -- Compilation "succeeded", but didn't return a new iface or
+ -- Compilation "succeeded", but didn't return a new
-- linkable, meaning that compilation wasn't needed, and the
-- new details were manufactured from the old iface.
- CompOK details Nothing pcs2
- -> let hst2 = addToUFM hst1 mod_name details
- hit2 = hit1
+ CompOK pcs2 new_details new_iface Nothing
+ -> let hst2 = addToUFM hst1 mod_name new_details
+ hit2 = addToUFM hit1 mod_name new_iface
threaded2 = CmThreaded pcs2 hst2 hit2
- old_linkable
- | ghci_mode == Interactive
- = findModuleLinkable oldUI mod_name
- | otherwise
- = LM mod_name
- [DotO (unJust (ml_obj_file (ms_location summary1))
- "upsweep_mod")]
in return (threaded2, Just old_linkable)
-- Compilation really did happen, and succeeded. A new
-- details, iface and linkable are returned.
- CompOK details (Just (new_iface, new_linkable)) pcs2
- -> let hst2 = addToUFM hst1 mod_name details
+ CompOK pcs2 new_details new_iface (Just new_linkable)
+ -> let hst2 = addToUFM hst1 mod_name new_details
hit2 = addToUFM hit1 mod_name new_iface
threaded2 = CmThreaded pcs2 hst2 hit2
in return (threaded2, Just new_linkable)
= (name_of_summary summ, ms_srcimps summ ++ ms_imps summ)
res = simple_transitive_closure (map toEdge summaries) [root]
in
- trace (showSDoc (text "DC of mod" <+> ppr root
- <+> text "=" <+> ppr res)) (
+ --trace (showSDoc (text "DC of mod" <+> ppr root
+ -- <+> text "=" <+> ppr res)) (
res
- )
+ --)
-- Calculate transitive closures from a set of roots given an adjacency list
simple_transitive_closure :: Eq a => [(a,[a])] -> [a] -> [a]
-- Chase downwards from the specified root set, returning summaries
-- for all home modules encountered. Only follow source-import
-- links.
-downsweep :: [ModuleName] -> IO [ModSummary]
+downsweep :: [FilePath] -> IO [ModSummary]
downsweep rootNm
- = do rootSummaries <- mapM getSummary rootNm
- loop (filter (isModuleInThisPackage.ms_mod) rootSummaries)
+ = do rootSummaries <- mapM getRootSummary rootNm
+ loop (filter (isHomeModule.ms_mod) rootSummaries)
where
+ getRootSummary :: FilePath -> IO ModSummary
+ getRootSummary file
+ | haskellish_file file
+ = do exists <- doesFileExist file
+ if exists then summariseFile file else do
+ throwDyn (OtherError ("can't find file `" ++ file ++ "'"))
+ | otherwise
+ = do exists <- doesFileExist hs_file
+ if exists then summariseFile hs_file else do
+ exists <- doesFileExist lhs_file
+ if exists then summariseFile lhs_file else do
+ getSummary (mkModuleName file)
+ where
+ hs_file = file ++ ".hs"
+ lhs_file = file ++ ".lhs"
+
getSummary :: ModuleName -> IO ModSummary
getSummary nm
- | trace ("getSummary: "++ showSDoc (ppr nm)) True
+ -- | trace ("getSummary: "++ showSDoc (ppr nm)) True
= do found <- findModule nm
case found of
-- Be sure not to use the mod and location passed in to
-- These will then conflict with the passed-in versions.
Just (mod, location) -> summarise mod location
Nothing -> throwDyn (OtherError
- ("no signs of life for module `"
+ ("can't find module `"
++ showSDoc (ppr nm) ++ "'"))
-- loop invariant: homeSummaries doesn't contain package modules
neededSummaries
<- mapM getSummary neededImps
let newHomeSummaries
- = filter (isModuleInThisPackage.ms_mod) neededSummaries
+ = filter (isHomeModule.ms_mod) neededSummaries
if null newHomeSummaries
then return homeSummaries
else loop (newHomeSummaries ++ homeSummaries)
+-----------------------------------------------------------------------------
+-- Summarising modules
+
+-- We have two types of summarisation:
+--
+-- * Summarise a file. This is used for the root module passed to
+-- cmLoadModule. The file is read, and used to determine the root
+-- module name. The module name may differ from the filename.
+--
+-- * Summarise a module. We are given a module name, and must provide
+-- a summary. The finder is used to locate the file in which the module
+-- resides.
+
+summariseFile :: FilePath -> IO ModSummary
+summariseFile file
+ = do hspp_fn <- preprocess file
+ modsrc <- readFile hspp_fn
+
+ let (srcimps,imps,mod_name) = getImports modsrc
+ (path, basename, ext) = splitFilename3 file
+
+ Just (mod, location)
+ <- mkHomeModuleLocn mod_name (path ++ '/':basename) file
+
+ maybe_src_timestamp
+ <- case ml_hs_file location of
+ Nothing -> return Nothing
+ Just src_fn -> maybe_getModificationTime src_fn
+
+ return (ModSummary mod
+ location{ml_hspp_file=Just hspp_fn}
+ srcimps imps
+ maybe_src_timestamp)
+
-- Summarise a module, and pick up source and interface timestamps.
summarise :: Module -> ModuleLocation -> IO ModSummary
summarise mod location
- | isModuleInThisPackage mod
- = do let hs_fn = unJust (ml_hs_file location) "summarise"
+ | isHomeModule mod
+ = do let hs_fn = unJust "summarise" (ml_hs_file location)
hspp_fn <- preprocess hs_fn
modsrc <- readFile hspp_fn
let (srcimps,imps,mod_name) = getImports modsrc
<- case ml_hs_file location of
Nothing -> return Nothing
Just src_fn -> maybe_getModificationTime src_fn
- maybe_iface_timestamp
- <- case ml_hi_file location of
- Nothing -> return Nothing
- Just if_fn -> maybe_getModificationTime if_fn
-
- -- If the module name is Main, allow it to be in a file
- -- different from Main.hs, and mash the mod and loc
- -- to match. Otherwise just moan.
- (mashed_mod, mashed_loc)
- <- case () of
- () | mod_name == moduleName mod
- -> return (mod, location)
- | mod_name /= moduleName mod && mod_name == mkModuleName "Main"
- -> return (mash mod location "Main")
- | otherwise
- -> do hPutStrLn stderr (showSDoc (
- text "ghc: warning: file name - module name mismatch:" <+>
- ppr (moduleName mod) <+> text "vs" <+> ppr mod_name))
- return (mash mod location (moduleNameUserString (moduleName mod)))
- where
- mash old_mod old_loc new_nm
- = (mkHomeModule (mkModuleName new_nm),
- old_loc{ml_hi_file = maybe_swizzle_basename new_nm
- (ml_hi_file old_loc)})
-
- maybe_swizzle_basename new Nothing = Nothing
- maybe_swizzle_basename new (Just old)
- = case splitFilename3 old of
- (dir, name, ext) -> Just (dir ++ new ++ ext)
-
- return (ModSummary mashed_mod
- mashed_loc{ml_hspp_file=Just hspp_fn}
- srcimps imps
- maybe_src_timestamp maybe_iface_timestamp)
- | otherwise
- = return (ModSummary mod location [] [] Nothing Nothing)
+ if mod_name == moduleName mod
+ then return ()
+ else throwDyn (OtherError
+ (showSDoc (text "file name does not match module name: "
+ <+> ppr (moduleName mod) <+> text "vs"
+ <+> ppr mod_name)))
- where
- maybe_getModificationTime :: FilePath -> IO (Maybe ClockTime)
- maybe_getModificationTime fn
- = (do time <- getModificationTime fn
- return (Just time))
- `catch`
- (\err -> return Nothing)
+ return (ModSummary mod location{ml_hspp_file=Just hspp_fn}
+ srcimps imps
+ maybe_src_timestamp)
+
+ | otherwise
+ = return (ModSummary mod location [] [] Nothing)
+
+maybe_getModificationTime :: FilePath -> IO (Maybe ClockTime)
+maybe_getModificationTime fn
+ = (do time <- getModificationTime fn
+ return (Just time))
+ `catch`
+ (\err -> return Nothing)
\end{code}
projects / ghc-hetmet.git / blobdiff