\section[CompManager]{The Compilation Manager}
\begin{code}
-module CompManager ( cmInit, cmLoadModule,
+module CompManager ( cmInit, cmLoadModule, cmUnload,
+#ifdef GHCI
cmGetExpr, cmRunExpr,
+#endif
CmState, emptyCmState -- abstract
)
where
#include "HsVersions.h"
-import List ( nub )
-import Maybe ( catMaybes, maybeToList, fromMaybe )
-import Maybes ( maybeToBool )
-import Outputable
-import UniqFM ( emptyUFM, lookupUFM, addToUFM, delListFromUFM )
-import Digraph ( SCC(..), stronglyConnComp, flattenSCC, flattenSCCs )
-
-import CmLink ( PersistentLinkerState, emptyPLS, Linkable(..),
- link, LinkResult(..),
- filterModuleLinkables, modname_of_linkable,
- is_package_linkable, findModuleLinkable )
+import CmLink
import CmTypes
import HscTypes
-import Interpreter ( HValue )
-import Module ( ModuleName, moduleName, packageOfModule,
- isModuleInThisPackage, PackageName, moduleEnvElts,
- moduleNameUserString )
-import CmStaticInfo ( Package(..), PackageConfigInfo, GhciMode )
+import Module ( Module, ModuleName, moduleName, isHomeModule,
+ mkModuleName, moduleNameUserString )
+import CmStaticInfo ( GhciMode(..) )
import DriverPipeline
import GetImports
import HscTypes ( HomeSymbolTable, HomeIfaceTable,
PersistentCompilerState, ModDetails(..) )
-import Name ( lookupNameEnv )
-import Module
-import PrelNames ( mainName )
import HscMain ( initPersistentCompilerState )
-import Finder ( findModule, emptyHomeDirCache )
-import DriverUtil ( BarfKind(..) )
+import Finder
+import UniqFM ( emptyUFM, lookupUFM, addToUFM, delListFromUFM,
+ UniqFM, listToUFM )
+import Unique ( Uniquable )
+import Digraph ( SCC(..), stronglyConnComp, flattenSCC )
+import DriverFlags ( getDynFlags )
+import DriverPhases
+import DriverUtil ( splitFilename3 )
+import ErrUtils ( showPass )
import Util
-import Panic ( panic )
+import DriverUtil
+import Outputable
+import Panic
+import CmdLineOpts ( DynFlags(..) )
+#ifdef GHCI
+import Interpreter ( HValue )
+import HscMain ( hscExpr )
+import Type ( Type )
+import PrelGHC ( unsafeCoerce# )
+#endif
+
+-- lang
import Exception ( throwDyn )
+
+-- std
+import Time ( ClockTime )
+import Directory ( getModificationTime, doesFileExist )
import IO
+import Monad
+import List ( nub )
+import Maybe ( catMaybes, fromMaybe, maybeToList )
\end{code}
-
\begin{code}
-cmInit :: PackageConfigInfo -> GhciMode -> IO CmState
-cmInit raw_package_info gmode
- = emptyCmState raw_package_info gmode
+cmInit :: GhciMode -> IO CmState
+cmInit gmode
+ = emptyCmState gmode
+#ifdef GHCI
cmGetExpr :: CmState
- -> ModuleName
+ -> DynFlags
+ -> Bool -- True <=> wrap in 'print' to get an IO-typed result
+ -> Module
-> String
- -> IO (CmState, Either [SDoc] HValue)
-cmGetExpr cmstate modhdl expr
- = return (panic "cmGetExpr:unimp")
-
+ -> IO (CmState, Maybe (HValue, PrintUnqualified, Type))
+cmGetExpr cmstate dflags wrap_io mod expr
+ = do (new_pcs, maybe_stuff) <-
+ hscExpr dflags wrap_io hst hit pcs mod expr
+ case maybe_stuff of
+ Nothing -> return (cmstate{ pcs=new_pcs }, Nothing)
+ Just (bcos, print_unqual, ty) -> do
+ hValue <- linkExpr pls bcos
+ return (cmstate{ pcs=new_pcs },
+ Just (hValue, print_unqual, ty))
+
+ -- ToDo: check that the module we passed in is sane/exists?
+ 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
- = return (panic "cmRunExpr:unimp")
-
+ = do unsafeCoerce# hval :: IO ()
+ -- putStrLn "done."
+#endif
-- Persistent state just for CM, excluding link & compile subsystems
data PersistentCMState
hit :: HomeIfaceTable, -- home interface table
ui :: UnlinkedImage, -- the unlinked images
mg :: ModuleGraph, -- the module graph
- pci :: PackageConfigInfo, -- NEVER CHANGES
gmode :: GhciMode -- NEVER CHANGES
}
-emptyPCMS :: PackageConfigInfo -> GhciMode -> PersistentCMState
-emptyPCMS pci gmode
+emptyPCMS :: GhciMode -> PersistentCMState
+emptyPCMS gmode
= PersistentCMState { hst = emptyHST, hit = emptyHIT,
ui = emptyUI, mg = emptyMG,
- pci = pci, gmode = gmode }
+ gmode = gmode }
emptyHIT :: HomeIfaceTable
emptyHIT = emptyUFM
pls :: PersistentLinkerState -- link's persistent state
}
-emptyCmState :: PackageConfigInfo -> GhciMode -> IO CmState
-emptyCmState pci gmode
- = do let pcms = emptyPCMS pci gmode
+emptyCmState :: GhciMode -> IO CmState
+emptyCmState gmode
+ = do let pcms = emptyPCMS gmode
pcs <- initPersistentCompilerState
pls <- emptyPLS
return (CmState { pcms = pcms,
\end{code}
+Unload the compilation manager's state: everything it knows about the
+current collection of modules in the Home package.
+
+\begin{code}
+cmUnload :: CmState -> IO CmState
+cmUnload state
+ = do -- Throw away the old home dir cache
+ emptyHomeDirCache
+ -- Throw away the HIT and the HST
+ return state{ pcms=pcms{ hst=new_hst, hit=new_hit } }
+ where
+ CmState{ pcms=pcms } = state
+ PersistentCMState{ hst=hst, hit=hit } = pcms
+ (new_hst, new_hit,[]) = retainInTopLevelEnvs [] (hst,hit,[])
+\end{code}
+
The real business of the compilation manager: given a system state and
a module name, try and bring the module up to date, probably changing
the system state at the same time.
\begin{code}
cmLoadModule :: CmState
- -> ModuleName
- -> IO (CmState, Maybe ModuleName)
+ -> FilePath
+ -> IO (CmState, -- new state
+ Bool, -- was successful
+ [Module]) -- list of modules loaded
cmLoadModule cmstate1 rootname
= do -- version 1's are the original, before downsweep
let pcms1 = pcms cmstate1
let pls1 = pls cmstate1
let pcs1 = pcs cmstate1
+ -- mg1 is the complete (home) set of summaries from the
+ -- previous pass of cmLoadModule, if there was one.
let mg1 = mg pcms1
let hst1 = hst pcms1
let hit1 = hit pcms1
+ -- similarly, ui1 is the (complete) set of linkables from
+ -- the previous pass, if any.
let ui1 = ui pcms1
- let pcii = pci pcms1 -- this never changes
- let ghci_mode = gmode pcms1 -- ToDo: fix!
+ let ghci_mode = gmode pcms1 -- this never changes
-- 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.
+ -- then generate version 2's by retaining in HIT,HST,UI a
+ -- stable set S of modules, as defined below.
+
+ dflags <- getDynFlags
+ let verb = verbosity dflags
- -- Throw away the old home dir cache
- emptyHomeDirCache
+ showPass dflags "Chasing dependencies"
+ when (verb >= 1 && ghci_mode == Batch) $
+ hPutStrLn stderr (progName ++ ": chasing modules from: " ++ rootname)
- hPutStr stderr "cmLoadModule: downsweep begins\n"
- mg2unsorted <- downsweep [rootname]
+ (mg2unsorted, a_root_is_Main) <- downsweep [rootname]
+ let mg2unsorted_names = map name_of_summary mg2unsorted
- let modnames1 = map name_of_summary mg1
- let modnames2 = map name_of_summary mg2unsorted
- let mods_to_zap = filter (`notElem` modnames2) modnames1
+ -- reachable_from follows source as well as normal imports
+ let reachable_from :: ModuleName -> [ModuleName]
+ reachable_from = downwards_closure_of_module mg2unsorted
- let (hst2, hit2, ui2)
- = removeFromTopLevelEnvs mods_to_zap (hst1, hit1, ui1)
-- should be cycle free; ignores 'import source's
let mg2 = topological_sort False mg2unsorted
- -- ... whereas this takes them into account. Only used for
+ -- ... whereas this takes them into account. Used for
-- backing out partially complete cycles following a failed
- -- upsweep.
+ -- upsweep, and for removing from hst/hit all the modules
+ -- not in strict downwards closure, during calls to compile.
let mg2_with_srcimps = topological_sort True mg2unsorted
-
- hPutStrLn stderr "after tsort:\n"
- hPutStrLn stderr (showSDoc (vcat (map ppr mg2)))
+
+ -- Figure out a stable set of modules which can be retained
+ -- the top level envs, to avoid upsweeping them. Goes to a
+ -- bit of trouble to avoid upsweeping module cycles.
+ --
+ -- Construct a set S of stable modules like this:
+ -- Travel upwards, over the sccified graph. For each scc
+ -- of modules ms, add ms to S only if:
+ -- 1. All home imports of ms are either in ms or S
+ -- 2. All m <- ms satisfy P, where
+ -- P | interactive = have old summary for m and it indicates
+ -- that the source is unchanged
+ -- | batch = linkable exists on disk, and is younger
+ -- than source.
+
+ (stable_mods, linkables_for_stable_mods)
+ <- preUpsweep ghci_mode ui1 mg1 mg2unsorted_names [] [] mg2_with_srcimps
+ let stable_old_summaries
+ = concatMap (findInSummaries mg1) stable_mods
+
+ when (verb >= 2) $
+ putStrLn (showSDoc (text "STABLE MODULES:"
+ <+> sep (map (text.moduleNameUserString) stable_mods)))
+
+
+ let (hst2, hit2, [])
+ = retainInTopLevelEnvs stable_mods (hst1, hit1, [])
+ ui2
+ = linkables_for_stable_mods
+
+ -- Now hst2, hit2, ui2 now hold the 'reduced system', just the set of
+ -- modules which are stable.
+
+ -- We could at this point detect cycles which aren't broken by
+ -- a source-import, and complain immediately, but it seems better
+ -- to let upsweep_mods do this, so at least some useful work gets
+ -- done before the upsweep is abandoned.
+ let upsweep_these
+ = filter (\scc -> any (`notElem` stable_mods)
+ (map name_of_summary (flattenSCC scc)))
+ 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 ui2 threaded2 mg2
+ (upsweep_complete_success, threaded3, modsUpswept, newLis)
+ <- upsweep_mods ghci_mode dflags ui2 reachable_from
+ threaded2 upsweep_these
let ui3 = add_to_ui ui2 newLis
let (CmThreaded pcs3 hst3 hit3) = threaded3
- -- At this point, modsDone and newLis should have the same
+ -- At this point, modsUpswept and newLis should have the same
-- length, so there is one new (or old) linkable for each
-- mod which was processed (passed to compile).
+ -- Make modsDone be the summaries for each home module now
+ -- available; this should equal the domains of hst3 and hit3.
+ -- (NOT STRICTLY TRUE if an interactive session was started
+ -- with some object on disk ???)
+ -- Get in in a roughly top .. bottom order (hence reverse).
+
+ let modsDone = reverse modsUpswept ++ stable_old_summaries
+
-- Try and do linking in some form, depending on whether the
-- upsweep was completely or only partially successful.
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 a_root_is_Main ui3 pls1
case linkresult of
LinkErrs _ _
-> panic "cmLoadModule: link failed (1)"
LinkOK pls3
-> do let pcms3 = PersistentCMState { hst=hst3, hit=hit3,
ui=ui3, mg=modsDone,
- pci=pcii, gmode=ghci_mode }
+ gmode=ghci_mode }
let cmstate3
= CmState { pcms=pcms3, pcs=pcs3, pls=pls3 }
- return (cmstate3, Just rootname)
+ return (cmstate3, True,
+ map ms_mod 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)"
LinkOK pls4
-> do let pcms4 = PersistentCMState { hst=hst4, hit=hit4,
ui=ui4, mg=mods_to_keep,
- pci=pcii, gmode=ghci_mode }
+ 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))
+ return (cmstate4, False,
+ map ms_mod mods_to_keep)
+
+
+
+-- Do a pre-upsweep without use of "compile", to establish a
+-- (downward-closed) set of stable modules which can be retained
+-- in the top-level environments. Also return linkables for those
+-- modules determined to be stable, since (in Batch mode, at least)
+-- there's no other way for them to get into UI.
+preUpsweep :: GhciMode
+ -> [Linkable] -- linkables from previous cmLoadModule pass
+ -- should be [] in batch mode
+ -> [ModSummary] -- summaries from previous cmLoadModule pass
+ -- should be [] in batch mode
+ -> [ModuleName] -- names of all mods encountered in downsweep
+ -> [ModuleName] -- accumulating stable modules
+ -> [Linkable] -- their linkables, in batch mode
+ -> [SCC ModSummary] -- scc-ified mod graph, including src imps
+ -> IO ([ModuleName], [Linkable])
+ -- stable modules and their linkables
+
+preUpsweep ghci_mode old_lis old_summaries all_home_mods stable lis []
+ = return (stable, lis)
+preUpsweep ghci_mode old_lis old_summaries all_home_mods stable lis (scc0:sccs)
+ = do let scc = flattenSCC scc0
+ scc_allhomeimps :: [ModuleName]
+ scc_allhomeimps
+ = nub (filter (`elem` all_home_mods) (concatMap ms_allimps scc))
+ all_imports_in_scc_or_stable
+ = all in_stable_or_scc scc_allhomeimps
+ scc_names
+ = map name_of_summary scc
+ in_stable_or_scc m
+ = --trace (showSDoc (text "ISOS" <+> ppr m <+> ppr scc_names <+> ppr stable)) (
+ m `elem` scc_names || m `elem` stable
+ --)
+ (all_scc_stable, more_lis)
+ <- if not all_imports_in_scc_or_stable
+ then do --putStrLn ("PART1 fail " ++ showSDoc (ppr scc_allhomeimps <+> ppr (filter (not.in_stable_or_scc) scc_allhomeimps)))
+ return (False, [])
+ else do bools_n_lis
+ <- mapM (is_stable ghci_mode old_lis old_summaries) scc
+ let (bools, liss) = unzip bools_n_lis
+ --when (not (and bools)) (putStrLn ("PART2 fail: " ++ showSDoc (ppr scc_names)))
+ return (and bools, concat liss)
+ if not all_scc_stable
+ then preUpsweep ghci_mode old_lis old_summaries all_home_mods stable lis sccs
+ else preUpsweep ghci_mode old_lis old_summaries all_home_mods
+ (scc_names++stable) (more_lis++lis) sccs
+
+
+-- Helper for preUpsweep. Assuming that new_summary's imports are all
+-- stable (in the sense of preUpsweep), determine if new_summary is itself
+-- stable, and, if so, in batch mode, return its linkable.
+findInSummaries :: [ModSummary] -> ModuleName -> [ModSummary]
+findInSummaries old_summaries mod_name
+ = [s | s <- old_summaries, name_of_summary s == mod_name]
+
+is_stable :: GhciMode
+ -> [Linkable] -> [ModSummary] -- OLD lis and summs, in Interactive mode
+ -> ModSummary -- this module
+ -> IO (Bool, [Linkable])
+
+is_stable Interactive old_lis old_summaries new_summary
+ -- Only true if the old summary exists and
+ -- the new source date matches the old one.
+ = case found_old_summarys of
+ [] -> return (False, old_linkable)
+ (old_summary:_)
+ -> case (ms_hs_date new_summary, ms_hs_date old_summary) of
+ (Just d1, Just d2) -> return (d1 == d2, old_linkable)
+ (_, _ ) -> return (False, old_linkable)
+ where
+ old_linkable
+ = maybeToList
+ (findModuleLinkable_maybe old_lis (name_of_summary new_summary))
+ found_old_summarys
+ = findInSummaries old_summaries (name_of_summary new_summary)
+
+is_stable Batch [] [] new_summary
+ -- Only true if we can find a linkable, and it is younger than
+ -- the source time.
+ = case ms_hs_date new_summary of
+ Nothing -> return (False, []) -- no source date (?!)
+ Just hs_time
+ -> case ml_obj_file (ms_location new_summary) of
+ Nothing -> return (False, []) -- no obj filename
+ Just fn
+ -> do maybe_li <- maybe_getFileLinkable
+ (moduleName (ms_mod new_summary)) fn
+ case maybe_li of
+ Nothing -> return (False, []) -- no object file on disk
+ Just li -> return (linkableTime li >= hs_time, [li])
+
-- Return (names of) all those in modsDone who are part of a cycle
else chewed_rest
-exports_main :: ModDetails -> Bool
-exports_main md
- = maybeToBool (lookupNameEnv (md_types md) mainName)
+-- Does this ModDetails export Main.main?
+--exports_main :: ModDetails -> Bool
+--exports_main md
+-- = isJust (lookupNameEnv (md_types md) mainName)
-- Add the given (LM-form) Linkables to the UI, overwriting previous
-- Compile multiple modules, stopping as soon as an error appears.
-- There better had not be any cyclic groups here -- we check for them.
-upsweep_mods :: UnlinkedImage -- old linkables
+upsweep_mods :: GhciMode
+ -> DynFlags
+ -> UnlinkedImage -- old linkables
+ -> (ModuleName -> [ModuleName]) -- to construct downward closures
-> CmThreaded -- PCS & HST & HIT
-> [SCC ModSummary] -- mods to do (the worklist)
-- ...... RETURNING ......
[ModSummary], -- mods which succeeded
[Linkable]) -- new linkables
-upsweep_mods oldUI threaded []
+upsweep_mods ghci_mode dflags oldUI reachable_from threaded
+ []
= return (True, threaded, [], [])
-upsweep_mods oldUI threaded ((CyclicSCC ms):_)
- = do hPutStrLn stderr ("ghc: module imports form a cycle for modules:\n\t" ++
+upsweep_mods ghci_mode dflags 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 oldUI threaded ((AcyclicSCC mod):mods)
- = do (threaded1, maybe_linkable) <- upsweep_mod oldUI threaded mod
+upsweep_mods ghci_mode dflags oldUI reachable_from threaded
+ ((AcyclicSCC mod):mods)
+ = do --case threaded of
+ -- CmThreaded pcsz hstz hitz
+ -- -> putStrLn ("UPSWEEP_MOD: hit = " ++ show (map (moduleNameUserString.moduleName.mi_module) (eltsUFM hitz)))
+
+ (threaded1, maybe_linkable)
+ <- upsweep_mod ghci_mode dflags oldUI threaded mod
+ (reachable_from (name_of_summary mod))
case maybe_linkable of
Just linkable
-> -- No errors; do the rest
do (restOK, threaded2, modOKs, linkables)
- <- upsweep_mods oldUI threaded1 mods
+ <- upsweep_mods ghci_mode dflags 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.
-upsweep_mod :: UnlinkedImage
+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
+ -> DynFlags
+ -> UnlinkedImage
-> CmThreaded
-> ModSummary
+ -> [ModuleName]
-> IO (CmThreaded, Maybe Linkable)
-upsweep_mod oldUI threaded1 summary1
- = do let mod_name = name_of_summary summary1
+upsweep_mod ghci_mode dflags oldUI threaded1 summary1 reachable_from_here
+ = do
+ let mod_name = name_of_summary summary1
+ let verb = verbosity dflags
+
+ when (verb == 1) $
+ if (ghci_mode == Batch)
+ then hPutStr stderr (progName ++ ": module "
+ ++ moduleNameUserString mod_name
+ ++ ": ")
+ else hPutStr stderr ("Compiling "
+ ++ moduleNameUserString mod_name
+ ++ " ... ")
+
let (CmThreaded pcs1 hst1 hit1) = threaded1
- let old_iface = lookupUFM hit1 (name_of_summary summary1)
- compresult <- compile summary1 old_iface hst1 hit1 pcs1
+ let old_iface = lookupUFM hit1 mod_name
+
+ 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_mandatory
+
+ (hst1_strictDC, hit1_strictDC, [])
+ = retainInTopLevelEnvs
+ (filter (/= (name_of_summary summary1)) 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
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
- threaded2 = CmThreaded pcs2 hst2 hit2
- old_linkable = findModuleLinkable oldUI mod_name
- in return (threaded2, Just old_linkable)
+ CompOK pcs2 new_details new_iface Nothing
+ -> do let hst2 = addToUFM hst1 mod_name new_details
+ hit2 = addToUFM hit1 mod_name new_iface
+ threaded2 = CmThreaded pcs2 hst2 hit2
+
+ if ghci_mode == Interactive && verb >= 1 then
+ -- if we're using an object file, tell the user
+ case maybe_old_linkable of
+ Just (LM _ _ objs@(DotO _:_))
+ -> do hPutStr stderr (showSDoc (space <>
+ parens (hsep (text "using":
+ punctuate comma
+ [ text o | DotO o <- objs ]))))
+ when (verb > 1) $ hPutStrLn stderr ""
+ _ -> return ()
+ else
+ return ()
+
+ when (verb == 1) $ hPutStrLn stderr ""
+ 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
- hit2 = addToUFM hit1 mod_name new_iface
- threaded2 = CmThreaded pcs2 hst2 hit2
- in return (threaded2, Just new_linkable)
+ CompOK pcs2 new_details new_iface (Just new_linkable)
+ -> do let hst2 = addToUFM hst1 mod_name new_details
+ hit2 = addToUFM hit1 mod_name new_iface
+ threaded2 = CmThreaded pcs2 hst2 hit2
+
+ when (verb == 1) $ hPutStrLn stderr ""
+ return (threaded2, Just new_linkable)
-- Compilation failed. compile may still have updated
-- the PCS, tho.
CompErrs pcs2
- -> let threaded2 = CmThreaded pcs2 hst1 hit1
- in return (threaded2, Nothing)
-
+ -> do let threaded2 = CmThreaded pcs2 hst1 hit1
+ when (verb == 1) $ hPutStrLn stderr ""
+ return (threaded2, Nothing)
+-- Remove unwanted modules from the top level envs (HST, HIT, UI).
removeFromTopLevelEnvs :: [ModuleName]
-> (HomeSymbolTable, HomeIfaceTable, UnlinkedImage)
-> (HomeSymbolTable, HomeIfaceTable, UnlinkedImage)
filterModuleLinkables (`notElem` zap_these) ui
)
+retainInTopLevelEnvs :: [ModuleName]
+ -> (HomeSymbolTable, HomeIfaceTable, UnlinkedImage)
+ -> (HomeSymbolTable, HomeIfaceTable, UnlinkedImage)
+retainInTopLevelEnvs keep_these (hst, hit, ui)
+ = (retainInUFM hst keep_these,
+ retainInUFM hit keep_these,
+ filterModuleLinkables (`elem` keep_these) ui
+ )
+ where
+ retainInUFM :: Uniquable key => UniqFM elt -> [key] -> UniqFM elt
+ retainInUFM ufm keys_to_keep
+ = listToUFM (concatMap (maybeLookupUFM ufm) keys_to_keep)
+ maybeLookupUFM ufm u
+ = case lookupUFM ufm u of Nothing -> []; Just val -> [(u, val)]
+
+-- Needed to clean up HIT and HST so that we don't get duplicates in inst env
+downwards_closure_of_module :: [ModSummary] -> ModuleName -> [ModuleName]
+downwards_closure_of_module summaries root
+ = let toEdge :: ModSummary -> (ModuleName,[ModuleName])
+ toEdge summ = (name_of_summary summ, ms_allimps summ)
+ res = simple_transitive_closure (map toEdge summaries) [root]
+ in
+ --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]
+simple_transitive_closure graph set
+ = let set2 = nub (concatMap dsts set ++ set)
+ dsts node = fromMaybe [] (lookup node graph)
+ in
+ if length set == length set2
+ then set
+ else simple_transitive_closure graph set2
+
+-- Calculate SCCs of the module graph, with or without taking into
+-- account source imports.
topological_sort :: Bool -> [ModSummary] -> [SCC ModSummary]
topological_sort include_source_imports summaries
= let
-- Chase downwards from the specified root set, returning summaries
-- for all home modules encountered. Only follow source-import
--- links.
-downsweep :: [ModuleName] -> IO [ModSummary]
+-- links. Also returns a Bool to indicate whether any of the roots
+-- are module Main.
+downsweep :: [FilePath] -> IO ([ModSummary], Bool)
downsweep rootNm
- = do rootSummaries <- mapM getSummary rootNm
- loop (filter (isModuleInThisPackage.ms_mod) rootSummaries)
+ = do rootSummaries <- mapM getRootSummary rootNm
+ let a_root_is_Main
+ = any ((=="Main").moduleNameUserString.name_of_summary)
+ rootSummaries
+ all_summaries
+ <- loop (filter (isHomeModule.ms_mod) rootSummaries)
+ return (all_summaries, a_root_is_Main)
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
+ -- summarise for any other purpose -- summarise may change
+ -- the module names in them if name of module /= name of file,
+ -- and put the changed versions in the returned summary.
+ -- 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) = getImports modsrc
+ let (srcimps,imps,mod_name) = getImports modsrc
--- maybe_timestamp
--- <- case ml_hs_file location of
--- Nothing -> return Nothing
--- Just src_fn -> getModificationTime src_fn >>= Just
+ maybe_src_timestamp
+ <- case ml_hs_file location of
+ Nothing -> return Nothing
+ Just src_fn -> maybe_getModificationTime src_fn
+
+ 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)))
return (ModSummary mod location{ml_hspp_file=Just hspp_fn}
srcimps imps
- {-maybe_timestamp-} )
+ maybe_src_timestamp)
+
| otherwise
- = return (ModSummary mod location [] [])
+ = 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