\begin{code}
module CompManager ( cmInit, cmLoadModule, cmUnload,
#ifdef GHCI
- cmGetExpr, cmTypeExpr, cmRunExpr,
+ cmGetExpr, cmRunExpr,
#endif
CmState, emptyCmState -- abstract
)
import CmLink
import CmTypes
import HscTypes
-import Module ( ModuleName, moduleName,
- isHomeModule, moduleEnvElts,
- moduleNameUserString )
+import Module ( Module, ModuleName, moduleName, isHomeModule,
+ mkModuleName, moduleNameUserString )
import CmStaticInfo ( GhciMode(..) )
import DriverPipeline
import GetImports
import HscTypes ( HomeSymbolTable, HomeIfaceTable,
PersistentCompilerState, ModDetails(..) )
-import Type ( Type )
-import Name ( lookupNameEnv )
-import Module
-import PrelNames ( mainName )
import HscMain ( initPersistentCompilerState )
import Finder
import UniqFM ( emptyUFM, lookupUFM, addToUFM, delListFromUFM,
UniqFM, listToUFM )
import Unique ( Uniquable )
-import Digraph ( SCC(..), stronglyConnComp )
+import Digraph ( SCC(..), stronglyConnComp, flattenSCC )
import DriverFlags ( getDynFlags )
import DriverPhases
-import DriverUtil ( BarfKind(..), splitFilename3 )
+import DriverUtil ( splitFilename3 )
import ErrUtils ( showPass )
import Util
+import DriverUtil
+import TmpFiles
import Outputable
-import Panic ( panic )
+import Panic
import CmdLineOpts ( DynFlags(..) )
+import IOExts
#ifdef GHCI
import Interpreter ( HValue )
-import HscMain ( hscExpr, hscTypeExpr )
-import RdrName
+import HscMain ( hscExpr )
+import Type ( Type )
import PrelGHC ( unsafeCoerce# )
#endif
import IO
import Monad
import List ( nub )
-import Maybe ( catMaybes, fromMaybe, isJust )
+import Maybe ( catMaybes, fromMaybe, isJust, fromJust )
\end{code}
#ifdef GHCI
cmGetExpr :: CmState
-> DynFlags
- -> ModuleName
+ -> Bool -- True <=> wrap in 'print' to get an IO-typed result
+ -> Module
-> String
- -> IO (CmState, Maybe HValue)
-cmGetExpr cmstate dflags modname expr
- = do (new_pcs, maybe_unlinked_iexpr) <-
- hscExpr dflags hst hit pcs (mkHomeModule modname) expr
- case maybe_unlinked_iexpr of
+ -> 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 uiexpr -> do
- hValue <- linkExpr pls uiexpr
- return (cmstate{ pcs=new_pcs }, Just hValue)
+ 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
-
-cmTypeExpr :: CmState
- -> DynFlags
- -> ModuleName
- -> String
- -> IO (CmState, Maybe (PrintUnqualified, 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
+ CmState{ hst=hst, hit=hit, pcs=pcs, pls=pls } = cmstate
-- The HValue should represent a value of type IO () (Perhaps IO a?)
cmRunExpr :: HValue -> IO ()
-- putStrLn "done."
#endif
--- Persistent state just for CM, excluding link & compile subsystems
-data PersistentCMState
- = PersistentCMState {
- hst :: HomeSymbolTable, -- home symbol table
- hit :: HomeIfaceTable, -- home interface table
- ui :: UnlinkedImage, -- the unlinked images
- mg :: ModuleGraph, -- the module graph
- gmode :: GhciMode -- NEVER CHANGES
- }
-
-emptyPCMS :: GhciMode -> PersistentCMState
-emptyPCMS gmode
- = PersistentCMState { hst = emptyHST, hit = emptyHIT,
- ui = emptyUI, mg = emptyMG,
- gmode = gmode }
-
emptyHIT :: HomeIfaceTable
emptyHIT = emptyUFM
emptyHST :: HomeSymbolTable
emptyHST = emptyUFM
-
-
-- Persistent state for the entire system
data CmState
= CmState {
- pcms :: PersistentCMState, -- CM's persistent state
+ hst :: HomeSymbolTable, -- home symbol table
+ hit :: HomeIfaceTable, -- home interface table
+ ui :: UnlinkedImage, -- the unlinked images
+ mg :: ModuleGraph, -- the module graph
+ gmode :: GhciMode, -- NEVER CHANGES
+
pcs :: PersistentCompilerState, -- compile's persistent state
pls :: PersistentLinkerState -- link's persistent state
}
emptyCmState :: GhciMode -> IO CmState
emptyCmState gmode
- = do let pcms = emptyPCMS gmode
- pcs <- initPersistentCompilerState
+ = do pcs <- initPersistentCompilerState
pls <- emptyPLS
- return (CmState { pcms = pcms,
+ return (CmState { hst = emptyHST,
+ hit = emptyHIT,
+ ui = emptyUI,
+ mg = emptyMG,
+ gmode = gmode,
pcs = pcs,
pls = pls })
= 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 } }
+ return state{ hst=new_hst, hit=new_hit, ui=emptyUI }
where
- CmState{ pcms=pcms } = state
- PersistentCMState{ hst=hst, hit=hit } = pcms
+ CmState{ hst=hst, hit=hit } = state
(new_hst, new_hit) = retainInTopLevelEnvs [] (hst,hit)
\end{code}
-> FilePath
-> IO (CmState, -- new state
Bool, -- was successful
- [ModuleName]) -- list of modules loaded
+ [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
- let mg1 = mg pcms1
- let hst1 = hst pcms1
- let hit1 = hit pcms1
- let ui1 = ui pcms1
-
- let ghci_mode = gmode pcms1 -- this never changes
+ let hst1 = hst cmstate1
+ let hit1 = hit cmstate1
+ -- similarly, ui1 is the (complete) set of linkables from
+ -- the previous pass, if any.
+ let ui1 = ui cmstate1
+ let mg1 = mg cmstate1
+
+ let ghci_mode = gmode cmstate1 -- 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
showPass dflags "Chasing dependencies"
when (verb >= 1 && ghci_mode == Batch) $
- hPutStrLn stderr ("ghc: chasing modules from: " ++ rootname)
+ hPutStrLn stderr (progName ++ ": chasing modules from: " ++ rootname)
- mg2unsorted <- downsweep [rootname]
+ (mg2unsorted, a_root_is_Main) <- downsweep [rootname] mg1
+ 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
-
- let (hst2, hit2, ui2)
- = removeFromTopLevelEnvs mods_to_zap (hst1, hit1, ui1)
+ -- reachable_from follows source as well as normal imports
+ let reachable_from :: ModuleName -> [ModuleName]
+ reachable_from = downwards_closure_of_module mg2unsorted
+
-- should be cycle free; ignores 'import source's
let mg2 = topological_sort False mg2unsorted
-- ... whereas this takes them into account. Used for
-- 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
-
- let reachable_from :: ModuleName -> [ModuleName]
- reachable_from = downwards_closure_of_module mg2unsorted
+
+ -- Sort out which linkables we wish to keep in the unlinked image.
+ -- See getValidLinkables below for details.
+ valid_linkables <- getValidLinkables ui1 mg2unsorted_names
+ mg2_with_srcimps
+
+ -- 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. A valid linkable exists for each module in ms
+
+ stable_mods
+ <- preUpsweep valid_linkables ui1 mg2unsorted_names
+ [] mg2_with_srcimps
+
+ let stable_summaries
+ = concatMap (findInSummaries mg2unsorted) stable_mods
+
+ stable_linkables
+ = filter (\m -> linkableModName m `elem` stable_mods)
+ valid_linkables
+
+ when (verb >= 2) $
+ putStrLn (showSDoc (text "STABLE MODULES:"
+ <+> sep (map (text.moduleNameUserString) stable_mods)))
+
+ -- unload any modules which aren't going to be re-linked this
+ -- time around.
+ pls2 <- unload ghci_mode dflags stable_linkables pls1
+
+ -- 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)))
-- Now do the upsweep, calling compile for each module in
-- turn. Final result is version 3 of everything.
- let threaded2 = CmThreaded pcs1 hst2 hit2
+ let threaded2 = CmThreaded pcs1 hst1 hit1
- (upsweep_complete_success, threaded3, modsDone, newLis)
- <- upsweep_mods ghci_mode ui2 reachable_from threaded2 mg2
+ (upsweep_complete_success, threaded3, modsUpswept, newLis)
+ <- upsweep_mods ghci_mode dflags valid_linkables reachable_from
+ threaded2 upsweep_these
- let ui3 = add_to_ui ui2 newLis
+ let ui3 = add_to_ui valid_linkables 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_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 when (verb >= 2) $
- hPutStrLn stderr "Upsweep completely successful."
+ hPutStrLn stderr "Upsweep completely successful."
+
+ -- clean up after ourselves
+ cleanTempFilesExcept verb (ppFilesFromSummaries modsDone)
+
linkresult
- <- link ghci_mode dflags
- (any exports_main (moduleEnvElts hst3))
- newLis pls1
+ <- link ghci_mode dflags a_root_is_Main ui3 pls2
case linkresult of
LinkErrs _ _
-> panic "cmLoadModule: link failed (1)"
LinkOK pls3
- -> do let pcms3 = PersistentCMState { hst=hst3, hit=hit3,
- ui=ui3, mg=modsDone,
- gmode=ghci_mode }
- let cmstate3
- = CmState { pcms=pcms3, pcs=pcs3, pls=pls3 }
- return (cmstate3, True, map name_of_summary modsDone)
+ -> do let cmstate3
+ = CmState { hst=hst3, hit=hit3,
+ ui=ui3, mg=modsDone,
+ gmode=ghci_mode,
+ pcs=pcs3, pls=pls3 }
+ return (cmstate3, True,
+ map ms_mod modsDone)
else
-- Tricky. We need to back out the effects of compiling any
= map (unJust "linkables_to_link" . findModuleLinkable_maybe ui4)
mods_to_keep_names
- linkresult <- link ghci_mode dflags False linkables_to_link pls1
+ -- clean up after ourselves
+ cleanTempFilesExcept verb (ppFilesFromSummaries mods_to_keep)
+
+ linkresult <- link ghci_mode dflags False linkables_to_link pls2
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,
- gmode=ghci_mode }
- let cmstate4
- = CmState { pcms=pcms4, pcs=pcs3, pls=pls4 }
- return (cmstate4, False, mods_to_keep_names)
+ LinkOK pls3
+ -> do let cmstate4
+ = CmState { hst=hst4, hit=hit4,
+ ui=ui4, mg=mods_to_keep,
+ gmode=ghci_mode, pcs=pcs3, pls=pls3 }
+ return (cmstate4, False,
+ map ms_mod mods_to_keep)
+
+
+ppFilesFromSummaries summaries
+ = [ fn | Just fn <- map (ml_hspp_file . ms_location) summaries ]
+
+-----------------------------------------------------------------------------
+-- getValidLinkables
+
+-- For each module (or SCC of modules), we take:
+--
+-- - the old in-core linkable, if available
+-- - an on-disk linkable, if available
+--
+-- and we take the youngest of these, provided it is younger than the
+-- source file. We ignore the on-disk linkables unless all of the
+-- dependents of this SCC also have on-disk linkables.
+--
+-- If a module has a valid linkable, then it may be STABLE (see below),
+-- and it is classified as SOURCE UNCHANGED for the purposes of calling
+-- compile.
+--
+-- ToDo: this pass could be merged with the preUpsweep.
+getValidLinkables
+ :: [Linkable] -- old linkables
+ -> [ModuleName] -- all home modules
+ -> [SCC ModSummary] -- all modules in the program, dependency order
+ -> IO [Linkable] -- still-valid linkables
+
+getValidLinkables old_linkables all_home_mods module_graph
+ = foldM (getValidLinkablesSCC old_linkables all_home_mods) [] module_graph
+
+getValidLinkablesSCC old_linkables all_home_mods new_linkables scc0
+ = let
+ scc = flattenSCC scc0
+ scc_names = map name_of_summary scc
+ home_module m = m `elem` all_home_mods && m `notElem` scc_names
+ scc_allhomeimps = nub (filter home_module (concatMap ms_allimps scc))
+
+ has_object m = case findModuleLinkable_maybe new_linkables m of
+ Nothing -> False
+ Just l -> isObjectLinkable l
+
+ objects_allowed = all has_object scc_allhomeimps
+ in do
+
+ these_linkables
+ <- foldM (getValidLinkable old_linkables objects_allowed) [] scc
+
+ -- since an scc can contain only all objects or no objects at all,
+ -- we have to check whether we got all objects or not, and re-do
+ -- the linkable check if not.
+ adjusted_linkables
+ <- if objects_allowed && not (all isObjectLinkable these_linkables)
+ then foldM (getValidLinkable old_linkables False) [] scc
+ else return these_linkables
+
+ return (adjusted_linkables ++ new_linkables)
+
+
+getValidLinkable :: [Linkable] -> Bool -> [Linkable] -> ModSummary
+ -> IO [Linkable]
+getValidLinkable old_linkables objects_allowed new_linkables summary
+ = do
+ let mod_name = name_of_summary summary
+
+ maybe_disk_linkable
+ <- if (not objects_allowed)
+ then return Nothing
+ else case ml_obj_file (ms_location summary) of
+ Just obj_fn -> maybe_getFileLinkable mod_name obj_fn
+ Nothing -> return Nothing
+
+ -- find an old in-core linkable if we have one. (forget about
+ -- on-disk linkables for now, we'll check again whether there's
+ -- one here below, just in case a new one has popped up recently).
+ let old_linkable = findModuleLinkable_maybe old_linkables mod_name
+ maybe_old_linkable =
+ case old_linkable of
+ Just (LM _ _ ls) | all isInterpretable ls -> old_linkable
+ _ -> Nothing
+
+ -- 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 linkable_list
+ = case (maybe_old_linkable, maybe_disk_linkable) of
+ (Nothing, Nothing) -> []
+ (Nothing, Just di) -> [di]
+ (Just ui, Nothing) -> [ui]
+ (Just ui, Just di)
+ | linkableTime ui >= linkableTime di -> [ui]
+ | otherwise -> [di]
+
+ -- only linkables newer than the source code are valid
+ let maybe_src_date = ms_hs_date summary
+
+ valid_linkable_list
+ = case maybe_src_date of
+ Nothing -> panic "valid_linkable_list"
+ Just src_date
+ -> filter (\li -> linkableTime li > src_date) linkable_list
+
+ return (valid_linkable_list ++ new_linkables)
+
+
+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]))
+
+
+-----------------------------------------------------------------------------
+-- Do a pre-upsweep without use of "compile", to establish a
+-- (downward-closed) set of stable modules for which we won't call compile.
+
+preUpsweep :: [Linkable] -- new valid linkables
+ -> [Linkable] -- old linkables
+ -> [ModuleName] -- names of all mods encountered in downsweep
+ -> [ModuleName] -- accumulating stable modules
+ -> [SCC ModSummary] -- scc-ified mod graph, including src imps
+ -> IO [ModuleName] -- stable modules
+
+preUpsweep valid_lis old_lis all_home_mods stable []
+ = return stable
+preUpsweep valid_lis old_lis all_home_mods stable (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
+ = m `elem` scc_names || m `elem` stable
+
+ -- now we check for valid linkables: each module in the SCC must
+ -- have a valid linkable (see getValidLinkables above), and the
+ -- newest linkable must be the same as the previous linkable for
+ -- this module (if one exists).
+ has_valid_linkable new_summary
+ = case findModuleLinkable_maybe valid_lis modname of
+ Nothing -> False
+ Just l -> case findModuleLinkable_maybe old_lis modname of
+ Nothing -> True
+ Just m -> linkableTime l == linkableTime m
+ where modname = name_of_summary new_summary
+
+ scc_is_stable = all_imports_in_scc_or_stable
+ && all has_valid_linkable scc
+
+ if scc_is_stable
+ then preUpsweep valid_lis old_lis all_home_mods
+ (scc_names++stable) sccs
+ else preUpsweep valid_lis old_lis all_home_mods
+ stable sccs
+
+ where
+
+
+-- 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]
+
+findModInSummaries :: [ModSummary] -> Module -> Maybe ModSummary
+findModInSummaries old_summaries mod
+ = case [s | s <- old_summaries, ms_mod s == mod] of
+ [] -> Nothing
+ (s:_) -> Just s
-- Return (names of) all those in modsDone who are part of a cycle
-- as defined by theGraph.
else chewed_rest
--- 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
-- versions if they exist.
add_to_ui :: UnlinkedImage -> [Linkable] -> UnlinkedImage
add_to_ui ui lis
- = foldr add1 ui lis
+ = filter (not_in lis) ui ++ lis
where
- add1 :: Linkable -> UnlinkedImage -> UnlinkedImage
- add1 li ui
- = li : filter (\li2 -> not (for_same_module li li2)) ui
-
- for_same_module :: Linkable -> Linkable -> Bool
- for_same_module li1 li2
- = not (is_package_linkable li1)
- && not (is_package_linkable li2)
- && modname_of_linkable li1 == modname_of_linkable li2
+ not_in :: [Linkable] -> Linkable -> Bool
+ not_in lis li
+ = all (\l -> linkableModName l /= mod) lis
+ where mod = linkableModName li
data CmThreaded -- stuff threaded through individual module compilations
-- 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 :: GhciMode
- -> UnlinkedImage -- old linkables
+ -> DynFlags
+ -> UnlinkedImage -- valid linkables
-> (ModuleName -> [ModuleName]) -- to construct downward closures
-> CmThreaded -- PCS & HST & HIT
-> [SCC ModSummary] -- mods to do (the worklist)
[ModSummary], -- mods which succeeded
[Linkable]) -- new linkables
-upsweep_mods ghci_mode oldUI reachable_from threaded
+upsweep_mods ghci_mode dflags oldUI reachable_from threaded
[]
= return (True, threaded, [], [])
-upsweep_mods ghci_mode oldUI reachable_from threaded
+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 ghci_mode oldUI reachable_from threaded
+upsweep_mods ghci_mode dflags oldUI reachable_from threaded
((AcyclicSCC mod):mods)
- = do (threaded1, maybe_linkable)
- <- upsweep_mod ghci_mode oldUI threaded mod
- (reachable_from (name_of_summary mod))
+ = 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 ghci_mode oldUI reachable_from
+ <- 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
-- 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
+ -> DynFlags
-> UnlinkedImage
-> CmThreaded
-> ModSummary
-> [ModuleName]
-> IO (CmThreaded, Maybe Linkable)
-upsweep_mod ghci_mode oldUI threaded1 summary1 reachable_from_here
- = do hPutStr stderr ("ghc: module "
- ++ moduleNameUserString (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)
-
- -- We *have* to compile it if we're in batch mode and we can't see
- -- a previous linkable for it on disk.
- compilation_mandatory
- <- if ghci_mode /= Batch then return False
- else case ml_obj_file (ms_location summary1) of
- Nothing -> do --putStrLn "cmcm: object?!"
- return True
- Just obj_fn -> do --putStrLn ("cmcm: old obj " ++ obj_fn)
- b <- doesFileExist obj_fn
- return (not b)
-
- 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
+ let old_iface = lookupUFM hit1 mod_name
- -- 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
+ let maybe_old_linkable = findModuleLinkable_maybe oldUI mod_name
+
+ source_unchanged = isJust maybe_old_linkable
(hst1_strictDC, hit1_strictDC)
- = retainInTopLevelEnvs reachable_from_here (hst1,hit1)
+ = retainInTopLevelEnvs
+ (filter (/= (name_of_summary summary1)) reachable_from_here)
+ (hst1,hit1)
old_linkable
= unJust "upsweep_mod:old_linkable" maybe_old_linkable
-- linkable, meaning that compilation wasn't needed, and the
-- new details were manufactured from the old iface.
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
- in return (threaded2, Just old_linkable)
+ -> 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 old_linkable of
+ (LM _ _ objs@(DotO _:_))
+ -> do hPutStrLn stderr (showSDoc (space <>
+ parens (hsep (text "using":
+ punctuate comma
+ [ text o | DotO o <- objs ]))))
+ _ -> return ()
+ else
+ return ()
+
+ return (threaded2, Just old_linkable)
-- Compilation really did happen, and succeeded. A new
-- details, iface and linkable are returned.
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)
+ -> do let hst2 = addToUFM hst1 mod_name new_details
+ hit2 = addToUFM hit1 mod_name new_iface
+ threaded2 = CmThreaded pcs2 hst2 hit2
+
+ 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
+ return (threaded2, Nothing)
-- Remove unwanted modules from the top level envs (HST, HIT, UI).
removeFromTopLevelEnvs :: [ModuleName]
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_srcimps summ ++ ms_imps summ)
+ 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
-- Chase downwards from the specified root set, returning summaries
-- for all home modules encountered. Only follow source-import
--- links.
-downsweep :: [FilePath] -> IO [ModSummary]
-downsweep rootNm
+-- links. Also returns a Bool to indicate whether any of the roots
+-- are module Main.
+downsweep :: [FilePath] -> [ModSummary] -> IO ([ModSummary], Bool)
+downsweep rootNm old_summaries
= do rootSummaries <- mapM getRootSummary rootNm
- loop (filter (isHomeModule.ms_mod) rootSummaries)
+ let a_root_is_Main
+ = any ((=="Main").moduleNameUserString.name_of_summary)
+ rootSummaries
+ all_summaries
+ <- loop (concat (map ms_imps rootSummaries))
+ (filter (isHomeModule.ms_mod) rootSummaries)
+ return (all_summaries, a_root_is_Main)
where
getRootSummary :: FilePath -> IO ModSummary
getRootSummary file
getSummary :: ModuleName -> IO ModSummary
getSummary nm
- -- | 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
+ Just (mod, location) -> do
+ let old_summary = findModInSummaries old_summaries mod
+ new_summary <- summarise mod location old_summary
+ case new_summary of
+ Nothing -> return (fromJust old_summary)
+ Just s -> return s
+
Nothing -> throwDyn (OtherError
("can't find module `"
++ showSDoc (ppr nm) ++ "'"))
- -- loop invariant: homeSummaries doesn't contain package modules
- loop :: [ModSummary] -> IO [ModSummary]
- loop homeSummaries
- = do let allImps :: [ModuleName]
- allImps = (nub . concatMap ms_imps) homeSummaries
- let allHome -- all modules currently in homeSummaries
- = map (moduleName.ms_mod) homeSummaries
- let neededImps
- = filter (`notElem` allHome) allImps
- neededSummaries
- <- mapM getSummary neededImps
- let newHomeSummaries
- = filter (isHomeModule.ms_mod) neededSummaries
- if null newHomeSummaries
- then return homeSummaries
- else loop (newHomeSummaries ++ homeSummaries)
+ -- loop invariant: home_summaries doesn't contain package modules
+ loop :: [ModuleName] -> [ModSummary] -> IO [ModSummary]
+ loop [] home_summaries = return home_summaries
+ loop imps home_summaries
+ = do -- all modules currently in homeSummaries
+ let all_home = map (moduleName.ms_mod) home_summaries
+
+ -- imports for modules we don't already have
+ let needed_imps = nub (filter (`notElem` all_home) imps)
+ -- summarise them
+ needed_summaries <- mapM getSummary needed_imps
+
+ -- get just the "home" modules
+ let new_home_summaries
+ = filter (isHomeModule.ms_mod) needed_summaries
+
+ -- loop, checking the new imports
+ let new_imps = concat (map ms_imps new_home_summaries)
+ loop new_imps (new_home_summaries ++ home_summaries)
-----------------------------------------------------------------------------
-- Summarising modules
srcimps imps
maybe_src_timestamp)
--- Summarise a module, and pick up source and interface timestamps.
-summarise :: Module -> ModuleLocation -> IO ModSummary
-summarise mod location
+-- Summarise a module, and pick up source and timestamp.
+summarise :: Module -> ModuleLocation -> Maybe ModSummary
+ -> IO (Maybe ModSummary)
+summarise mod location old_summary
| isHomeModule mod
= do let hs_fn = unJust "summarise" (ml_hs_file location)
+
+ maybe_src_timestamp
+ <- case ml_hs_file location of
+ Nothing -> return Nothing
+ Just src_fn -> maybe_getModificationTime src_fn
+
+ -- return the cached summary if the source didn't change
+ case old_summary of {
+ Just s | ms_hs_date s == maybe_src_timestamp -> return Nothing;
+ _ -> do
+
hspp_fn <- preprocess hs_fn
modsrc <- readFile hspp_fn
let (srcimps,imps,mod_name) = getImports modsrc
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)))
+ when (mod_name /= moduleName mod) $
+ 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_src_timestamp)
+ return (Just (ModSummary mod location{ml_hspp_file=Just hspp_fn}
+ srcimps imps
+ maybe_src_timestamp))
+ }
| otherwise
- = return (ModSummary mod location [] [] Nothing)
+ = return (Just (ModSummary mod location [] [] Nothing))
maybe_getModificationTime :: FilePath -> IO (Maybe ClockTime)
maybe_getModificationTime fn
projects / ghc-hetmet.git / blobdiff