\section[CompManager]{The Compilation Manager}
\begin{code}
-module CompManager ( cmInit, cmLoadModule,
+module CompManager ( cmInit, cmLoadModule, cmUnload,
+#ifdef GHCI
cmGetExpr, cmRunExpr,
- CmState, emptyCmState, -- abstract
- cmLookupSymbol --tmp
+#endif
+ CmState, emptyCmState -- abstract
)
where
#include "HsVersions.h"
-import List ( nub )
-import Maybe ( catMaybes, fromMaybe )
-import Maybes ( maybeToBool )
-import Outputable
-import UniqFM ( emptyUFM, lookupUFM, addToUFM, delListFromUFM,
- UniqFM, listToUFM )
-import Unique ( Uniquable )
-import Digraph ( SCC(..), stronglyConnComp )
-
import CmLink
import CmTypes
import HscTypes
-import Interpreter ( HValue )
-import Module ( ModuleName, moduleName,
- isModuleInThisPackage, moduleEnvElts,
- moduleNameUserString )
-import CmStaticInfo ( 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 RdrName
-import Module
-import PrelNames ( mainName )
import HscMain ( initPersistentCompilerState )
-import Finder ( findModule, emptyHomeDirCache )
-import DriverUtil ( BarfKind(..), splitFilename3 )
+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(..) )
+import IOExts
+#ifdef GHCI
+import Interpreter ( HValue )
+import HscMain ( hscExpr )
+import Type ( Type )
+import PrelGHC ( unsafeCoerce# )
+#endif
+
+-- lang
import Exception ( throwDyn )
-import IO
+
+-- std
import Time ( ClockTime )
import Directory ( getModificationTime, doesFileExist )
-
+import IO
+import Monad
+import List ( nub )
+import Maybe ( catMaybes, fromMaybe, maybeToList, isJust )
\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{ hst=hst, hit=hit, pcs=pcs, pls=pls } = cmstate
+-- The HValue should represent a value of type IO () (Perhaps IO a?)
cmRunExpr :: HValue -> IO ()
cmRunExpr hval
- = return (panic "cmRunExpr:unimp")
-
-
--- 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
- pci :: PackageConfigInfo, -- NEVER CHANGES
- gmode :: GhciMode -- NEVER CHANGES
- }
-
-emptyPCMS :: PackageConfigInfo -> GhciMode -> PersistentCMState
-emptyPCMS pci gmode
- = PersistentCMState { hst = emptyHST, hit = emptyHIT,
- ui = emptyUI, mg = emptyMG,
- pci = pci, gmode = gmode }
+ = do unsafeCoerce# hval :: IO ()
+ -- putStrLn "done."
+#endif
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 :: PackageConfigInfo -> GhciMode -> IO CmState
-emptyCmState pci gmode
- = do let pcms = emptyPCMS pci gmode
- pcs <- initPersistentCompilerState
+emptyCmState :: GhciMode -> IO CmState
+emptyCmState gmode
+ = 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 })
\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{ hst=new_hst, hit=new_hit }
+ where
+ CmState{ hst=hst, hit=hit } = state
+ (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
- let mg1 = mg pcms1
- let hst1 = hst pcms1
- let hit1 = hit pcms1
- let ui1 = ui pcms1
+ 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 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
+ 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.
- -- Throw away the old home dir cache
- emptyHomeDirCache
+ dflags <- getDynFlags
+ let verb = verbosity dflags
- hPutStr stderr "cmLoadModule: downsweep begins\n"
- mg2unsorted <- downsweep [rootname]
+ showPass dflags "Chasing dependencies"
+ when (verb >= 1 && ghci_mode == Batch) $
+ hPutStrLn stderr (progName ++ ": chasing modules from: " ++ rootname)
- let modnames1 = map name_of_summary mg1
- let modnames2 = map name_of_summary mg2unsorted
- let mods_to_zap = filter (`notElem` modnames2) modnames1
+ (mg2unsorted, a_root_is_Main) <- downsweep [rootname]
+ let mg2unsorted_names = map name_of_summary mg2unsorted
- 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
- hPutStrLn stderr "after tsort:\n"
- hPutStrLn stderr (showSDoc (vcat (map ppr mg2)))
+ -- Sort out which linkables we wish to keep in the unlinked image.
+ -- For each module, 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.
+ --
+ -- 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.
+ valid_linkables <- getValidLinkables ui1 mg2unsorted
+
+ -- 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 mg2unsorted_names [] mg2_with_srcimps
+
+ let stable_summaries
+ = concatMap (findInSummaries mg2unsorted) stable_mods
+
+ when (verb >= 2) $
+ putStrLn (showSDoc (text "STABLE MODULES:"
+ <+> sep (map (text.moduleNameUserString) stable_mods)))
+
+ -- 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.
-- 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 source_changed 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 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 }
- let cmstate3
- = CmState { pcms=pcms3, pcs=pcs3, pls=pls3 }
- return (cmstate3, Just rootname)
+ -> 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
-- 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 }
- 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
- )
+ -> do let cmstate4
+ = CmState { hst=hst4, hit=hit4,
+ ui=ui4, mg=mods_to_keep,
+ gmode=ghci_mode, pcs=pcs3, pls=pls4 }
+ return (cmstate4, False,
+ map ms_mod mods_to_keep)
+
+
+-----------------------------------------------------------------------------
+-- getValidLinkables
+
+getValidLinkables
+ :: [Linkable] -- old linkables
+ -> [ModSummary] -- all modules in the program
+ -> IO [Linkable] -- still-valid linkables
+
+getValidLinkables old_linkables summaries
+ = do lis <- mapM (getValidLinkable old_linkables) summaries
+ return (concat lis)
+
+getValidLinkable old_linkables summary
+ = do let mod_name = moduleName (ms_mod summary)
+ maybe_disk_linkable
+ <- case ml_obj_file (ms_location summary) of
+ Nothing -> return Nothing
+ Just obj_fn -> maybe_getFileLinkable mod_name obj_fn
+
+ -- 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
+
+
+
+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 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 :: [Linkable] -- valid 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 all_home_mods stable []
+ = return stable
+preUpsweep valid_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
+ = --trace (showSDoc (text "ISOS" <+> ppr m <+> ppr scc_names <+> ppr stable)) (
+ m `elem` scc_names || m `elem` stable
+ --)
+ all_scc_stable
+ <- 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 --when (not (and bools)) (putStrLn ("PART2 fail: " ++ showSDoc (ppr scc_names)))
+ return (all is_stable scc)
+ if not all_scc_stable
+ then preUpsweep valid_lis all_home_mods stable sccs
+ else preUpsweep valid_lis all_home_mods (scc_names++stable) sccs
+
+ where is_stable new_summary
+ = isJust (findModuleLinkable_maybe valid_lis (name_of_summary new_summary))
+
+
+-- 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]
- [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.
-- Does this ModDetails export Main.main?
-exports_main :: ModDetails -> Bool
-exports_main md
- = maybeToBool (lookupNameEnv (md_types md) mainName)
+--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 :: GhciMode
- -> UnlinkedImage -- old linkables
+ -> DynFlags
+ -> UnlinkedImage -- valid 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 dflags 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 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 source_changed threaded ((AcyclicSCC mod):mods)
- = do (threaded1, maybe_linkable)
- <- upsweep_mod ghci_mode oldUI threaded mod
- (reachable_from (name_of_summary mod))
- (source_changed 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 ghci_mode oldUI reachable_from source_changed 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 :: GhciMode
+ -> DynFlags
-> 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 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 compilation_might_be_needed
- = source_might_have_changed || compilation_mandatory
- source_unchanged
- = not compilation_might_be_needed
+ let old_iface = lookupUFM hit1 mod_name
+
+ 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
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
- 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)
+ 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]
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
- <+> 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]
+-- 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
-- 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)
-
-cmLookupSymbol :: RdrName -> CmState -> Maybe HValue
-cmLookupSymbol nm CmState{ pls = pls } = lookupClosure nm pls
+ 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