\begin{code}
{-# OPTIONS -fvia-C #-}
module CompManager (
- ModuleGraph,
+ ModuleGraph, ModSummary(..),
CmState, emptyCmState, -- abstract
cmDepAnal, -- :: CmState -> DynFlags -> [FilePath] -> IO ModuleGraph
cmLoadModules, -- :: CmState -> DynFlags -> ModuleGraph
- -- -> IO (CmState, [String])
+ -- -> IO (CmState, Bool, [String])
cmUnload, -- :: CmState -> DynFlags -> IO CmState
cmCompileExpr, -- :: CmState -> DynFlags -> String
-- -> IO (CmState, Maybe HValue)
- cmGetModuleGraph, -- :: CmState -> ModuleGraph
- cmGetLinkables, -- :: CmState -> [Linkable]
+ cmGetModInfo, -- :: CmState -> (ModuleGraph, HomePackageTable)
+ findModuleLinkable_maybe, -- Exported to InteractiveUI
cmGetBindings, -- :: CmState -> [TyThing]
cmGetPrintUnqual, -- :: CmState -> PrintUnqualified
-#endif
- -- utils
- showModMsg, --
+ sandboxIO -- Should be somewhere else
+#endif
)
where
#include "HsVersions.h"
-import MkIface --tmp
-import HsSyn -- tmp
-
-import CmLink
-import CmTypes
-import DriverPipeline
-import DriverState ( v_Output_file )
+import DriverPipeline ( CompResult(..), preprocess, compile, link )
+import DriverState ( v_Output_file, v_NoHsMain )
import DriverPhases
import DriverUtil
import Finder
-#ifdef GHCI
-import HscMain ( initPersistentCompilerState, hscThing,
- hscModuleContents )
-#else
import HscMain ( initPersistentCompilerState )
-#endif
-import HscTypes
-import Name ( Name, NamedThing(..), nameRdrName, nameModule,
- isHomePackageName, isGlobalName )
+import HscTypes hiding ( moduleNameToModule )
import NameEnv
-import Rename ( mkGlobalContext )
-import RdrName ( emptyRdrEnv )
-import Module
+import PrelNames ( gHC_PRIM_Name )
+import Module ( Module, ModuleName, moduleName, mkModuleName, isHomeModule,
+ ModuleEnv, lookupModuleEnvByName, mkModuleEnv, moduleEnvElts,
+ extendModuleEnvList, extendModuleEnv,
+ moduleNameUserString,
+ ModLocation(..) )
import GetImports
import UniqFM
-import Unique ( Uniquable )
import Digraph ( SCC(..), stronglyConnComp, flattenSCC, flattenSCCs )
import ErrUtils ( showPass )
import SysTools ( cleanTempFilesExcept )
+import BasicTypes ( SuccessFlag(..), succeeded, failed )
import Util
import Outputable
import Panic
import CmdLineOpts ( DynFlags(..), getDynFlags )
+import Maybes ( expectJust, orElse )
-import IOExts
+import DATA_IOREF ( readIORef )
#ifdef GHCI
-import RdrName ( lookupRdrEnv )
-import Id ( idType, idName )
+import HscMain ( hscThing, hscStmt, hscTcExpr )
+import Module ( moduleUserString )
+import TcRnDriver ( mkGlobalContext, getModuleContents )
+import Name ( Name, NamedThing(..), isExternalName, nameModule )
+import Id ( idType )
import Type ( tidyType )
import VarEnv ( emptyTidyEnv )
-import BasicTypes ( Fixity, defaultFixity )
-import Interpreter ( HValue )
-import HscMain ( hscStmt )
-import GlaExts ( unsafeCoerce# )
+import BasicTypes ( Fixity, FixitySig(..), defaultFixity )
+import Linker ( HValue, unload, extendLinkEnv )
+import GHC.Exts ( unsafeCoerce# )
import Foreign
-import CForeign
-import Exception ( Exception, try )
+import Control.Exception as Exception ( Exception, try )
#endif
--- lang
-import Exception ( throwDyn )
+import EXCEPTION ( throwDyn )
-- std
import Directory ( getModificationTime, doesFileExist )
import Monad
import List ( nub )
import Maybe
+import Time ( ClockTime )
\end{code}
-- Persistent state for the entire system
data CmState
= CmState {
- hst :: HomeSymbolTable, -- home symbol table
- hit :: HomeIfaceTable, -- home interface table
- ui :: UnlinkedImage, -- the unlinked images
- mg :: ModuleGraph, -- the module graph
gmode :: GhciMode, -- NEVER CHANGES
- ic :: InteractiveContext, -- command-line binding info
- pcs :: PersistentCompilerState, -- compile's persistent state
- pls :: PersistentLinkerState -- link's persistent state
+ hpt :: HomePackageTable, -- Info about home package module
+ mg :: ModuleGraph, -- the module graph
+ ic :: InteractiveContext, -- command-line binding info
+
+ pcs :: PersistentCompilerState -- compile's persistent state
}
+cmGetModInfo cmstate = (mg cmstate, hpt cmstate)
+cmGetBindings cmstate = nameEnvElts (ic_type_env (ic cmstate))
+cmGetPrintUnqual cmstate = icPrintUnqual (ic cmstate)
+
emptyCmState :: GhciMode -> IO CmState
emptyCmState gmode
= do pcs <- initPersistentCompilerState
- pls <- emptyPLS
- return (CmState { hst = emptySymbolTable,
- hit = emptyIfaceTable,
- ui = emptyUI,
+ return (CmState { hpt = emptyHomePackageTable,
mg = emptyMG,
gmode = gmode,
ic = emptyInteractiveContext,
- pcs = pcs,
- pls = pls })
-
-emptyInteractiveContext
- = InteractiveContext { ic_toplev_scope = [],
- ic_exports = [],
- ic_rn_gbl_env = emptyRdrEnv,
- ic_print_unqual = alwaysQualify,
- ic_rn_local_env = emptyRdrEnv,
- ic_type_env = emptyTypeEnv }
-
--- CM internal types
-type UnlinkedImage = [Linkable] -- the unlinked images (should be a set, really)
-emptyUI :: UnlinkedImage
-emptyUI = []
-
-type ModuleGraph = [ModSummary] -- the module graph, topologically sorted
-emptyMG :: ModuleGraph
-emptyMG = []
-
------------------------------------------------------------------------------
--- Produce an initial CmState.
+ pcs = pcs })
cmInit :: GhciMode -> IO CmState
cmInit mode = emptyCmState mode
------------------------------------------------------------------------------
--- Grab information from the CmState
-cmGetModuleGraph = mg
-cmGetLinkables = ui
+-------------------------------------------------------------------
+-- The unlinked image
+--
+-- The compilation manager keeps a list of compiled, but as-yet unlinked
+-- binaries (byte code or object code). Even when it links bytecode
+-- it keeps the unlinked version so it can re-link it later without
+-- recompiling.
+
+type UnlinkedImage = [Linkable] -- the unlinked images (should be a set, really)
+emptyUI :: UnlinkedImage
+emptyUI = []
+
+findModuleLinkable_maybe :: [Linkable] -> ModuleName -> Maybe Linkable
+findModuleLinkable_maybe lis mod
+ = case [LM time nm us | LM time nm us <- lis, nm == mod] of
+ [] -> Nothing
+ [li] -> Just li
+ many -> pprPanic "findModuleLinkable" (ppr mod)
+
+filterModuleLinkables :: (ModuleName -> Bool) -> [Linkable] -> [Linkable]
+filterModuleLinkables p [] = []
+filterModuleLinkables p (li:lis)
+ = case li of
+ LM _ modnm _ -> if p modnm then retain else dump
+ where
+ dump = filterModuleLinkables p lis
+ retain = li : dump
+
+linkableInSet :: Linkable -> [Linkable] -> Bool
+linkableInSet l objs_loaded =
+ case findModuleLinkable_maybe objs_loaded (linkableModName l) of
+ Nothing -> False
+ Just m -> linkableTime l == linkableTime m
+\end{code}
+
-cmGetBindings cmstate = nameEnvElts (ic_type_env (ic cmstate))
-cmGetPrintUnqual cmstate = ic_print_unqual (ic cmstate)
+%************************************************************************
+%* *
+ GHCI stuff
+%* *
+%************************************************************************
+\begin{code}
+#ifdef GHCI
-----------------------------------------------------------------------------
-- Setting the context doesn't throw away any bindings; the bindings
-- we've built up in the InteractiveContext simply move to the new
-> [String] -- and the just the exports from these
-> IO CmState
cmSetContext cmstate dflags toplevs exports = do
- let CmState{ hit=hit, hst=hst, pcs=pcs, ic=old_ic } = cmstate
+ let CmState{ hpt=hpt, pcs=pcs, ic=old_ic } = cmstate
+ hsc_env = HscEnv { hsc_mode = Interactive, hsc_dflags = dflags,
+ hsc_HPT = hpt }
- toplev_mods <- mapM (getTopLevModule hit) (map mkModuleName toplevs)
- export_mods <- mapM (moduleNameToModule hit) (map mkModuleName exports)
+ toplev_mods <- mapM (getTopLevModule hpt) (map mkModuleName toplevs)
+ export_mods <- mapM (moduleNameToModule hpt) (map mkModuleName exports)
- (new_pcs, print_unqual, maybe_env)
- <- mkGlobalContext dflags hit hst pcs toplev_mods export_mods
+ (new_pcs, maybe_env)
+ <- mkGlobalContext hsc_env pcs toplev_mods export_mods
case maybe_env of
- Nothing -> return cmstate
+ Nothing -> return cmstate
Just env -> return cmstate{ pcs = new_pcs,
ic = old_ic{ ic_toplev_scope = toplev_mods,
ic_exports = export_mods,
- ic_rn_gbl_env = env,
- ic_print_unqual = print_unqual } }
+ ic_rn_gbl_env = env } }
+
+getTopLevModule hpt mn =
+ case lookupModuleEnvByName hpt mn of
+
+ Just mod_info
+ | isJust (mi_globals iface) -> return (mi_module iface)
+ where
+ iface = hm_iface mod_info
-getTopLevModule hit mn =
- case lookupModuleEnvByName hit mn of
- Just iface
- | Just _ <- mi_globals iface -> return (mi_module iface)
_other -> throwDyn (CmdLineError (
"cannot enter the top-level scope of a compiled module (module `" ++
moduleNameUserString mn ++ "')"))
-moduleNameToModule :: HomeIfaceTable -> ModuleName -> IO Module
-moduleNameToModule hit mn = do
- case lookupModuleEnvByName hit mn of
- Just iface -> return (mi_module iface)
+moduleNameToModule :: HomePackageTable -> ModuleName -> IO Module
+moduleNameToModule hpt mn = do
+ case lookupModuleEnvByName hpt mn of
+ Just mod_info -> return (mi_module (hm_iface mod_info))
_not_a_home_module -> do
maybe_stuff <- findModule mn
case maybe_stuff of
- Nothing -> throwDyn (CmdLineError ("can't find module `"
+ Left _ -> throwDyn (CmdLineError ("can't find module `"
++ moduleNameUserString mn ++ "'"))
- Just (m,_) -> return m
+ Right (m,_) -> return m
cmGetContext :: CmState -> IO ([String],[String])
cmGetContext CmState{ic=ic} =
cmModuleIsInterpreted :: CmState -> String -> IO Bool
cmModuleIsInterpreted cmstate str
- = case lookupModuleEnvByName (hit cmstate) (mkModuleName str) of
- Just iface -> return (not (isNothing (mi_globals iface)))
+ = case lookupModuleEnvByName (hpt cmstate) (mkModuleName str) of
+ Just details -> return (isJust (mi_globals (hm_iface details)))
_not_a_home_module -> return False
-----------------------------------------------------------------------------
-- A string may refer to more than one TyThing (eg. a constructor,
-- and type constructor), so we return a list of all the possible TyThings.
-#ifdef GHCI
cmInfoThing :: CmState -> DynFlags -> String -> IO (CmState, [(TyThing,Fixity)])
cmInfoThing cmstate dflags id
- = do (new_pcs, things) <- hscThing dflags hst hit pcs icontext id
- let pairs = map (\x -> (x, getFixity new_pcs (getName x))) things
+ = do (new_pcs, things) <- hscThing hsc_env pcs icontext id
+ let new_pit = eps_PIT (pcs_EPS new_pcs)
+ pairs = map (\x -> (x, getFixity new_pit (getName x))) things
return (cmstate{ pcs=new_pcs }, pairs)
where
- CmState{ hst=hst, hit=hit, pcs=pcs, pls=pls, ic=icontext } = cmstate
-
- getFixity :: PersistentCompilerState -> Name -> Fixity
- getFixity pcs name
- | isGlobalName name,
- Just iface <- lookupModuleEnv iface_table (nameModule name),
- Just fixity <- lookupNameEnv (mi_fixities iface) name
- = fixity
+ CmState{ hpt=hpt, pcs=pcs, ic=icontext } = cmstate
+ hsc_env = HscEnv { hsc_mode = Interactive,
+ hsc_dflags = dflags,
+ hsc_HPT = hpt }
+
+ getFixity :: PackageIfaceTable -> Name -> Fixity
+ getFixity pit name
+ | isExternalName name,
+ Just iface <- lookupIface hpt pit (nameModule name),
+ Just (FixitySig _ fixity _) <- lookupNameEnv (mi_fixities iface) name
+ = fixity
| otherwise
- = defaultFixity
- where iface_table | isHomePackageName name = hit
- | otherwise = pcs_PIT pcs
-#endif
+ = defaultFixity
-- ---------------------------------------------------------------------------
-- cmBrowseModule: get all the TyThings defined in a module
-#ifdef GHCI
cmBrowseModule :: CmState -> DynFlags -> String -> Bool
-> IO (CmState, [TyThing])
cmBrowseModule cmstate dflags str exports_only = do
let mn = mkModuleName str
- mod <- moduleNameToModule hit mn
+ mod <- moduleNameToModule hpt mn
(pcs1, maybe_ty_things)
- <- hscModuleContents dflags hst hit pcs mod exports_only
+ <- getModuleContents hsc_env pcs mod exports_only
case maybe_ty_things of
Nothing -> return (cmstate{pcs=pcs1}, [])
Just ty_things -> return (cmstate{pcs=pcs1}, ty_things)
where
- CmState{ hst=hst, hit=hit, pcs=pcs, pls=pls, ic=icontext } = cmstate
-#endif
+ hsc_env = HscEnv { hsc_mode = Interactive, hsc_dflags = dflags,
+ hsc_HPT = hpt }
+ CmState{ hpt=hpt, pcs=pcs, ic=icontext } = cmstate
-----------------------------------------------------------------------------
-- cmRunStmt: Run a statement/expr.
-#ifdef GHCI
data CmRunResult
= CmRunOk [Name] -- names bound by this evaluation
| CmRunFailed
| CmRunException Exception -- statement raised an exception
cmRunStmt :: CmState -> DynFlags -> String -> IO (CmState, CmRunResult)
-cmRunStmt cmstate@CmState{ hst=hst, hit=hit, pcs=pcs, pls=pls, ic=icontext }
+cmRunStmt cmstate@CmState{ hpt=hpt, pcs=pcs, ic=icontext }
dflags expr
= do
- let InteractiveContext {
- ic_rn_local_env = rn_env,
- ic_type_env = type_env } = icontext
-
+ let hsc_env = HscEnv { hsc_mode = Interactive,
+ hsc_dflags = dflags,
+ hsc_HPT = hpt }
+
(new_pcs, maybe_stuff)
- <- hscStmt dflags hst hit pcs icontext expr False{-stmt-}
+ <- hscStmt hsc_env pcs icontext expr
case maybe_stuff of
Nothing -> return (cmstate{ pcs=new_pcs }, CmRunFailed)
- Just (ids, _, bcos) -> do
-
- -- update the interactive context
- let
- names = map idName ids
-
- -- these names have just been shadowed
- shadowed = [ n | r <- map nameRdrName names,
- Just n <- [lookupRdrEnv rn_env r] ]
-
- new_rn_env = extendLocalRdrEnv rn_env names
-
- -- remove any shadowed bindings from the type_env
- filtered_type_env = delListFromNameEnv type_env shadowed
-
- new_type_env = extendNameEnvList filtered_type_env
- [ (getName id, AnId id) | id <- ids]
+ Just (new_ic, names, hval) -> do
- new_ic = icontext { ic_rn_local_env = new_rn_env,
- ic_type_env = new_type_env }
-
- -- link it
- hval <- linkExpr pls bcos
-
- -- run it!
let thing_to_run = unsafeCoerce# hval :: IO [HValue]
either_hvals <- sandboxIO thing_to_run
+
case either_hvals of
- Left err
- -> do hPutStrLn stderr ("unknown failure, code " ++ show err)
- return ( cmstate{ pcs=new_pcs, ic=new_ic }, CmRunFailed )
-
- Right maybe_hvals ->
- case maybe_hvals of
- Left e ->
- return ( cmstate{ pcs=new_pcs, ic=new_ic },
- CmRunException e )
- Right hvals -> do
- -- Get the newly bound things, and bind them.
- -- Don't forget to delete any shadowed bindings from the
- -- closure_env, lest we end up with a space leak.
- pls <- delListFromClosureEnv pls shadowed
- new_pls <- addListToClosureEnv pls (zip names hvals)
-
- return (cmstate{ pcs=new_pcs, pls=new_pls, ic=new_ic },
- CmRunOk names)
+ Left e -> do
+ -- on error, keep the *old* interactive context,
+ -- so that 'it' is not bound to something
+ -- that doesn't exist.
+ return ( cmstate{ pcs=new_pcs }, CmRunException e )
+
+ Right hvals -> do
+ -- Get the newly bound things, and bind them.
+ -- Don't need to delete any shadowed bindings;
+ -- the new ones override the old ones.
+ extendLinkEnv (zip names hvals)
+
+ return (cmstate{ pcs=new_pcs, ic=new_ic },
+ CmRunOk names)
-- We run the statement in a "sandbox" to protect the rest of the
-- consists of just wrapping it in an exception handler, but see below
-- for another version.
-sandboxIO :: IO a -> IO (Either Int (Either Exception a))
-sandboxIO thing = do
- r <- Exception.try thing
- return (Right r)
+sandboxIO :: IO a -> IO (Either Exception a)
+sandboxIO thing = Exception.try thing
{-
-- This version of sandboxIO runs the expression in a completely new
-- won't be delivered to the new thread, instead they'll be delivered
-- to the (blocked) GHCi main thread.
+-- SLPJ: when re-enabling this, reflect a wrong-stat error as an exception
+
sandboxIO :: IO a -> IO (Either Int (Either Exception a))
sandboxIO thing = do
st_thing <- newStablePtr (Exception.try thing)
rts_evalStableIO :: StablePtr (IO a) -> Ptr (StablePtr a) -> IO CInt
-- more informative than the C type!
-}
-#endif
-----------------------------------------------------------------------------
-- cmTypeOfExpr: returns a string representing the type of an expression
-#ifdef GHCI
cmTypeOfExpr :: CmState -> DynFlags -> String -> IO (CmState, Maybe String)
cmTypeOfExpr cmstate dflags expr
- = do (new_pcs, maybe_stuff)
- <- hscStmt dflags hst hit pcs ic expr True{-just an expr-}
+ = do (new_pcs, maybe_stuff) <- hscTcExpr hsc_env pcs ic expr
let new_cmstate = cmstate{pcs = new_pcs}
case maybe_stuff of
Nothing -> return (new_cmstate, Nothing)
- Just (_, ty, _) -> return (new_cmstate, Just str)
+ Just ty -> return (new_cmstate, Just str)
where
- str = showSDocForUser unqual (ppr tidy_ty)
- unqual = ic_print_unqual ic
+ str = showSDocForUser unqual (text expr <+> dcolon <+> ppr tidy_ty)
+ unqual = icPrintUnqual ic
tidy_ty = tidyType emptyTidyEnv ty
where
- CmState{ hst=hst, hit=hit, pcs=pcs, ic=ic } = cmstate
-#endif
+ CmState{ hpt=hpt, pcs=pcs, ic=ic } = cmstate
+ hsc_env = HscEnv { hsc_mode = Interactive,
+ hsc_dflags = dflags,
+ hsc_HPT = hpt }
+
+
-----------------------------------------------------------------------------
-- cmTypeOfName: returns a string representing the type of a name.
-#ifdef GHCI
cmTypeOfName :: CmState -> Name -> IO (Maybe String)
-cmTypeOfName CmState{ hit=hit, pcs=pcs, ic=ic } name
- = case lookupNameEnv (ic_type_env ic) name of
+cmTypeOfName CmState{ pcs=pcs, ic=ic } name
+ = do
+ hPutStrLn stderr ("cmTypeOfName: " ++ showSDoc (ppr name))
+ case lookupNameEnv (ic_type_env ic) name of
Nothing -> return Nothing
Just (AnId id) -> return (Just str)
where
- unqual = ic_print_unqual ic
+ unqual = icPrintUnqual ic
ty = tidyType emptyTidyEnv (idType id)
str = showSDocForUser unqual (ppr ty)
_ -> panic "cmTypeOfName"
-#endif
-----------------------------------------------------------------------------
-- cmCompileExpr: compile an expression and deliver an HValue
-#ifdef GHCI
cmCompileExpr :: CmState -> DynFlags -> String -> IO (CmState, Maybe HValue)
cmCompileExpr cmstate dflags expr
= do
- let InteractiveContext {
- ic_rn_local_env = rn_env,
- ic_type_env = type_env } = icontext
-
+ let hsc_env = HscEnv { hsc_mode = Interactive,
+ hsc_dflags = dflags,
+ hsc_HPT = hpt }
+
(new_pcs, maybe_stuff)
- <- hscStmt dflags hst hit pcs icontext
- ("let __cmCompileExpr = "++expr) False{-stmt-}
+ <- hscStmt hsc_env pcs icontext
+ ("let __cmCompileExpr = "++expr)
case maybe_stuff of
Nothing -> return (cmstate{ pcs=new_pcs }, Nothing)
- Just (ids, _, bcos) -> do
-
- -- link it
- hval <- linkExpr pls bcos
+ Just (new_ic, names, hval) -> do
- -- run it!
- let thing_to_run = unsafeCoerce# hval :: IO [HValue]
- hvals <- thing_to_run
+ -- Run it!
+ hvals <- (unsafeCoerce# hval) :: IO [HValue]
- case (ids,hvals) of
- ([id],[hv]) -> return (cmstate{ pcs=new_pcs }, Just hv)
- _ -> panic "cmCompileExpr"
+ case (names,hvals) of
+ ([n],[hv]) -> return (cmstate{ pcs=new_pcs }, Just hv)
+ _ -> panic "cmCompileExpr"
where
- CmState{ hst=hst, hit=hit, pcs=pcs, pls=pls, ic=icontext } = cmstate
-#endif
+ CmState{ hpt=hpt, pcs=pcs, ic=icontext } = cmstate
+#endif /* GHCI */
+\end{code}
+
+%************************************************************************
+%* *
+ Loading and unloading
+%* *
+%************************************************************************
+
+\begin{code}
-----------------------------------------------------------------------------
-- Unload the compilation manager's state: everything it knows about the
-- current collection of modules in the Home package.
cmUnload :: CmState -> DynFlags -> IO CmState
-cmUnload state@CmState{ gmode=mode, pls=pls, pcs=pcs } dflags
+cmUnload state@CmState{ gmode=mode, pcs=pcs } dflags
= do -- Throw away the old home dir cache
- emptyHomeDirCache
+ flushFinderCache
-- Unload everything the linker knows about
- new_pls <- CmLink.unload mode dflags [] pls
+ cm_unload mode dflags []
-- Start with a fresh CmState, but keep the PersistentCompilerState
new_state <- cmInit mode
- return new_state{ pcs=pcs, pls=new_pls }
+ return new_state{ pcs=pcs }
+
+cm_unload Batch dflags linkables = return ()
+
+#ifdef GHCI
+cm_unload Interactive dflags linkables = Linker.unload dflags linkables
+#else
+cm_unload Interactive dflags linkables = panic "unload: no interpreter"
+#endif
-----------------------------------------------------------------------------
-- Trace dependency graph
-- This is a seperate pass so that the caller can back off and keep
--- the current state if the downsweep fails.
+-- the current state if the downsweep fails. Typically the caller
+-- might go cmDepAnal
+-- cmUnload
+-- cmLoadModules
+-- He wants to do the dependency analysis before the unload, so that
+-- if the former fails he can use the later
cmDepAnal :: CmState -> DynFlags -> [FilePath] -> IO ModuleGraph
cmDepAnal cmstate dflags rootnames
= do showPass dflags "Chasing dependencies"
when (verbosity dflags >= 1 && gmode cmstate == Batch) $
hPutStrLn stderr (showSDoc (hcat [
- text progName, text ": chasing modules from: ",
+ text "Chasing modules from: ",
hcat (punctuate comma (map text rootnames))]))
downsweep rootnames (mg cmstate)
-- a module name, try and bring the module up to date, probably changing
-- the system state at the same time.
-cmLoadModules :: CmState
- -> DynFlags
- -> ModuleGraph
- -> IO (CmState, -- new state
- Bool, -- was successful
- [String]) -- list of modules loaded
+cmLoadModules :: CmState -- The HPT may not be as up to date
+ -> DynFlags -- as the ModuleGraph
+ -> ModuleGraph -- Bang up to date
+ -> IO (CmState, -- new state
+ SuccessFlag, -- was successful
+ [String]) -- list of modules loaded
cmLoadModules cmstate1 dflags mg2unsorted
= do -- version 1's are the original, before downsweep
- let pls1 = pls cmstate1
let pcs1 = pcs cmstate1
- 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 hpt1 = hpt cmstate1
let ghci_mode = gmode cmstate1 -- this never changes
let mg2 = topological_sort False mg2unsorted
-- ... whereas this takes them into account. Used for
-- backing out partially complete cycles following a failed
- -- upsweep, and for removing from hst/hit all the modules
+ -- upsweep, and for removing from hpt all the modules
-- not in strict downwards closure, during calls to compile.
let mg2_with_srcimps = topological_sort True mg2unsorted
-- Sort out which linkables we wish to keep in the unlinked image.
-- See getValidLinkables below for details.
(valid_old_linkables, new_linkables)
- <- getValidLinkables ui1 mg2unsorted_names mg2_with_srcimps
+ <- getValidLinkables ghci_mode (hptLinkables hpt1)
+ mg2unsorted_names mg2_with_srcimps
-- putStrLn (showSDoc (vcat [ppr valid_old_linkables, ppr new_linkables]))
- -- uniq of ModuleName is the same as Module, fortunately...
- let hit2 = delListFromUFM hit1 (map linkableModName new_linkables)
+ -- Uniq of ModuleName is the same as Module, fortunately...
+ let hpt2 = delListFromUFM hpt1 (map linkableModName new_linkables)
-- When (verb >= 2) $
-- putStrLn (showSDoc (text "Valid linkables:"
valid_old_linkables
when (verb >= 2) $
- putStrLn (showSDoc (text "Stable modules:"
+ hPutStrLn stderr (showSDoc (text "Stable modules:"
<+> sep (map (text.moduleNameUserString) stable_mods)))
- -- unload any modules which are going to be re-linked this
+ -- Unload any modules which are going to be re-linked this
-- time around.
- pls2 <- CmLink.unload ghci_mode dflags stable_linkables pls1
+ cm_unload ghci_mode dflags stable_linkables
-- we can now glom together our linkable sets
let valid_linkables = valid_old_linkables ++ new_linkables
-- Now do the upsweep, calling compile for each module in
-- turn. Final result is version 3 of everything.
- let threaded2 = CmThreaded pcs1 hst1 hit2
+ let threaded2 = CmThreaded pcs1 hpt2
-- clean up between compilations
let cleanup = cleanTempFilesExcept verb
- (ppFilesFromSummaries (flattenSCCs upsweep_these))
+ (ppFilesFromSummaries (flattenSCCs mg2))
- (upsweep_complete_success, threaded3, modsUpswept, newLis)
+ (upsweep_ok, threaded3, modsUpswept)
<- upsweep_mods ghci_mode dflags valid_linkables reachable_from
threaded2 cleanup upsweep_these
- let ui3 = add_to_ui valid_linkables newLis
- let (CmThreaded pcs3 hst3 hit3) = threaded3
+ let (CmThreaded pcs3 hpt3) = threaded3
-- 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.
+ -- available; this should equal the domain of hpt3.
-- (NOT STRICTLY TRUE if an interactive session was started
-- with some object on disk ???)
-- Get in in a roughly top .. bottom order (hence reverse).
-- Try and do linking in some form, depending on whether the
-- upsweep was completely or only partially successful.
- if upsweep_complete_success
+ if succeeded upsweep_ok
then
-- Easy; just relink it all.
-- clean up after ourselves
cleanTempFilesExcept verb (ppFilesFromSummaries modsDone)
- -- issue a warning for the confusing case where the user said '-o foo'
- -- but we're not going to do any linking.
ofile <- readIORef v_Output_file
- when (ghci_mode == Batch && isJust ofile && not a_root_is_Main
+ no_hs_main <- readIORef v_NoHsMain
+
+ -- Issue a warning for the confusing case where the user
+ -- said '-o foo' but we're not going to do any linking.
+ -- We attempt linking if either (a) one of the modules is
+ -- called Main, or (b) the user said -no-hs-main, indicating
+ -- that main() is going to come from somewhere else.
+ --
+ let do_linking = a_root_is_Main || no_hs_main
+ when (ghci_mode == Batch && isJust ofile && not do_linking
&& verb > 0) $
hPutStrLn stderr "Warning: output was redirected with -o, but no output will be generated\nbecause there is no Main module."
-- link everything together
- linkresult <- link ghci_mode dflags a_root_is_Main ui3 pls2
+ linkresult <- link ghci_mode dflags do_linking hpt3
- cmLoadFinish True linkresult
- hst3 hit3 ui3 modsDone ghci_mode pcs3
+ cmLoadFinish Succeeded linkresult
+ hpt3 modsDone ghci_mode pcs3
else
-- Tricky. We need to back out the effects of compiling any
= filter ((`notElem` mods_to_zap_names).modSummaryName)
modsDone
- let (hst4, hit4, ui4)
- = retainInTopLevelEnvs (map modSummaryName mods_to_keep)
- (hst3,hit3,ui3)
+ let hpt4 = retainInTopLevelEnvs (map modSummaryName mods_to_keep) hpt3
- -- clean up after ourselves
+ -- Clean up after ourselves
cleanTempFilesExcept verb (ppFilesFromSummaries mods_to_keep)
- -- link everything together
- linkresult <- link ghci_mode dflags False ui4 pls2
+ -- Link everything together
+ linkresult <- link ghci_mode dflags False hpt4
- cmLoadFinish False linkresult
- hst4 hit4 ui4 mods_to_keep ghci_mode pcs3
+ cmLoadFinish Failed linkresult
+ hpt4 mods_to_keep ghci_mode pcs3
-- Finish up after a cmLoad.
-- If the link failed, unload everything and return.
-cmLoadFinish ok (LinkFailed pls) hst hit ui mods ghci_mode pcs = do
- dflags <- getDynFlags
- new_pls <- CmLink.unload ghci_mode dflags [] pls
+cmLoadFinish ok Failed hpt mods ghci_mode pcs = do
+ dflags <- getDynFlags
+ cm_unload ghci_mode dflags []
new_state <- cmInit ghci_mode
- return (new_state{ pcs=pcs, pls=new_pls }, False, [])
+ return (new_state{ pcs=pcs }, Failed, [])
-- Empty the interactive context and set the module context to the topmost
-- newly loaded module, or the Prelude if none were loaded.
-cmLoadFinish ok (LinkOK pls) hst hit ui mods ghci_mode pcs
- = do let new_cmstate = CmState{ hst=hst, hit=hit, ui=ui, mg=mods,
- gmode=ghci_mode, pcs=pcs, pls=pls,
+cmLoadFinish ok Succeeded hpt mods ghci_mode pcs
+ = do let new_cmstate = CmState{ hpt=hpt, mg=mods,
+ gmode=ghci_mode, pcs=pcs,
ic = emptyInteractiveContext }
mods_loaded = map (moduleNameUserString.modSummaryName) mods
= [ fn | Just fn <- map toPpFile summaries ]
where
toPpFile sum
- | hspp /= ml_hs_file loc = hspp
- | otherwise = Nothing
+ | not (isSameFilePath hspp hs) = hspp
+ | otherwise = Nothing
where
loc = ms_location sum
hspp = ml_hspp_file loc
+ hs = ml_hs_file loc
+
+ -- better make extra sure 'a' and 'b' are in canonical form
+ -- before using this equality test.
+ isSameFilePath a b = fmap normalise a == fmap normalise b
+ -- a hack, because sometimes we strip off the leading "./" from a
+ -- a filename.
+ normalise ('.':'/':f) = f
+ normalise f = f
-----------------------------------------------------------------------------
--- getValidLin
+-- getValidLinkables
-- For each module (or SCC of modules), we take:
--
--
-- - the old linkable, otherwise (and if one is available).
--
--- and we throw away the linkable if it is older than the source
--- file. We ignore the on-disk linkables unless all of the dependents
--- of this SCC also have on-disk linkables.
+-- and we throw away the linkable if it is older than the source file.
+-- In interactive mode, we also ignore the on-disk linkables unless
+-- all of the dependents of this SCC also have on-disk linkables (we
+-- can't have dynamically loaded objects that depend on interpreted
+-- modules in GHCi).
--
-- 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
-- ToDo: this pass could be merged with the preUpsweep.
getValidLinkables
- :: [Linkable] -- old linkables
+ :: GhciMode
+ -> [Linkable] -- old linkables
-> [ModuleName] -- all home modules
-> [SCC ModSummary] -- all modules in the program, dependency order
-> IO ( [Linkable], -- still-valid linkables
[Linkable] -- new linkables we just found
)
-getValidLinkables old_linkables all_home_mods module_graph = do
- ls <- foldM (getValidLinkablesSCC old_linkables all_home_mods)
+getValidLinkables mode old_linkables all_home_mods module_graph = do
+ ls <- foldM (getValidLinkablesSCC mode old_linkables all_home_mods)
[] module_graph
return (partition_it ls [] [])
where
| otherwise = partition_it ls (l:valid) new
-getValidLinkablesSCC old_linkables all_home_mods new_linkables scc0
+getValidLinkablesSCC mode old_linkables all_home_mods new_linkables scc0
= let
scc = flattenSCC scc0
scc_names = map modSummaryName scc
Nothing -> False
Just l -> isObjectLinkable l
- objects_allowed = all has_object scc_allhomeimps
+ objects_allowed = mode == Batch || all has_object scc_allhomeimps
in do
new_linkables'
getValidLinkable :: [Linkable] -> Bool -> [(Linkable,Bool)] -> ModSummary
-> IO [(Linkable,Bool)]
- -- True <=> linkable is new
+ -- True <=> linkable is new; i.e. freshly discovered on the disk
+ -- presumably generated 'on the side'
+ -- by a separate GHC run
getValidLinkable old_linkables objects_allowed new_linkables summary
+ -- 'objects_allowed' says whether we permit this module to
+ -- have a .o-file linkable. We only permit it if all the
+ -- modules it depends on also have .o files; a .o file can't
+ -- link to a bytecode module
= do let mod_name = modSummaryName 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
+ else findLinkable mod_name (ms_location summary)
let old_linkable = findModuleLinkable_maybe old_linkables mod_name
return (new_linkables' ++ new_linkables)
-maybe_getFileLinkable :: ModuleName -> FilePath -> IO (Maybe Linkable)
-maybe_getFileLinkable mod 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 [DotO obj_fn, DotO stub_fn]))
- else return (Just (LM obj_time mod [DotO obj_fn]))
+hptLinkables :: HomePackageTable -> [Linkable]
+-- Get all the linkables from the home package table, one for each module
+-- Once the HPT is up to date, these are the ones we should link
+hptLinkables hpt = map hm_linkable (moduleEnvElts hpt)
-----------------------------------------------------------------------------
-- a stable module:
-- * has a valid linkable (see getValidLinkables above)
-- * depends only on stable modules
--- * has an interface in the HIT (interactive mode only)
+-- * has an interface in the HPT (interactive mode only)
preUpsweep :: [Linkable] -- new valid linkables
-> [ModuleName] -- names of all mods encountered in downsweep
done `elem` names_in_this_cycle])
chewed_rest = chew rest
in
- if not (null mods_in_this_cycle)
+ if notNull mods_in_this_cycle
&& length mods_in_this_cycle < length names_in_this_cycle
then mods_in_this_cycle ++ chewed_rest
else chewed_rest
--- 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
- = filter (not_in lis) ui ++ lis
- where
- 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
- = CmThreaded PersistentCompilerState HomeSymbolTable HomeIfaceTable
+ = CmThreaded PersistentCompilerState HomePackageTable
-- 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
-> DynFlags
- -> UnlinkedImage -- valid linkables
+ -> [Linkable] -- Valid linkables
-> (ModuleName -> [ModuleName]) -- to construct downward closures
- -> CmThreaded -- PCS & HST & HIT
+ -> CmThreaded -- PCS & HPT
-> IO () -- how to clean up unwanted tmp files
-> [SCC ModSummary] -- mods to do (the worklist)
-- ...... RETURNING ......
- -> IO (Bool{-complete success?-},
- CmThreaded,
- [ModSummary], -- mods which succeeded
- [Linkable]) -- new linkables
+ -> IO (SuccessFlag,
+ CmThreaded, -- Includes linkables
+ [ModSummary]) -- Mods which succeeded
upsweep_mods ghci_mode dflags oldUI reachable_from threaded cleanup
[]
- = return (True, threaded, [], [])
+ = return (Succeeded, threaded, [])
upsweep_mods ghci_mode dflags oldUI reachable_from threaded cleanup
((CyclicSCC ms):_)
= do hPutStrLn stderr ("Module imports form a cycle for modules:\n\t" ++
unwords (map (moduleNameUserString.modSummaryName) ms))
- return (False, threaded, [], [])
+ return (Failed, threaded, [])
upsweep_mods ghci_mode dflags oldUI reachable_from threaded cleanup
((AcyclicSCC mod):mods)
= do --case threaded of
- -- CmThreaded pcsz hstz hitz
- -- -> putStrLn ("UPSWEEP_MOD: hit = " ++ show (map (moduleNameUserString.moduleName.mi_module) (eltsUFM hitz)))
+ -- CmThreaded pcsz hptz
+ -- -> putStrLn ("UPSWEEP_MOD: hpt = " ++
+ -- show (map (moduleNameUserString.moduleName.mi_module.hm_iface) (eltsUFM hptz)))
- (threaded1, maybe_linkable)
- <- upsweep_mod ghci_mode dflags oldUI threaded mod
- (reachable_from (modSummaryName mod))
+ (ok_flag, threaded1) <- upsweep_mod ghci_mode dflags oldUI threaded mod
+ (reachable_from (modSummaryName mod))
- -- remove unwanted tmp files between compilations
- cleanup
+ cleanup -- Remove unwanted tmp files between compilations
- case maybe_linkable of
- Just linkable
- -> -- No errors; do the rest
- do (restOK, threaded2, modOKs, linkables)
+ if failed ok_flag then
+ return (Failed, threaded1, [])
+ else do
+ (restOK, threaded2, modOKs)
<- upsweep_mods ghci_mode dflags oldUI reachable_from
threaded1 cleanup mods
- return (restOK, threaded2, mod:modOKs, linkable:linkables)
- Nothing -- we got a compilation error; give up now
- -> return (False, threaded1, [], [])
+ return (restOK, threaded2, mod:modOKs)
-- Compile a single module. Always produce a Linkable for it if
-> CmThreaded
-> ModSummary
-> [ModuleName]
- -> IO (CmThreaded, Maybe Linkable)
+ -> IO (SuccessFlag, CmThreaded)
upsweep_mod ghci_mode dflags oldUI threaded1 summary1 reachable_inc_me
= do
- let mod_name = modSummaryName summary1
+ let this_mod = ms_mod summary1
+ location = ms_location summary1
+ mod_name = moduleName this_mod
- let (CmThreaded pcs1 hst1 hit1) = threaded1
- let old_iface = lookupUFM hit1 mod_name
+ let (CmThreaded pcs1 hpt1) = threaded1
+ let mb_old_iface = case lookupModuleEnvByName hpt1 mod_name of
+ Just mod_info -> Just (hm_iface mod_info)
+ Nothing -> Nothing
let maybe_old_linkable = findModuleLinkable_maybe oldUI mod_name
+ source_unchanged = isJust maybe_old_linkable
- source_unchanged = isJust maybe_old_linkable
-
- reachable_only = filter (/= (modSummaryName summary1))
- reachable_inc_me
+ reachable_only = filter (/= mod_name) reachable_inc_me
- -- in interactive mode, all home modules below us *must* have an
- -- interface in the HIT. We never demand-load home interfaces in
+ -- In interactive mode, all home modules below us *must* have an
+ -- interface in the HPT. We never demand-load home interfaces in
-- interactive mode.
- (hst1_strictDC, hit1_strictDC, [])
- = ASSERT(ghci_mode == Batch ||
- all (`elemUFM` hit1) reachable_only)
- retainInTopLevelEnvs reachable_only (hst1,hit1,[])
+ hpt1_strictDC
+ = ASSERT(ghci_mode == Batch || all (`elemUFM` hpt1) reachable_only)
+ retainInTopLevelEnvs reachable_only hpt1
- old_linkable
- = unJust "upsweep_mod:old_linkable" maybe_old_linkable
+ old_linkable = expectJust "upsweep_mod:old_linkable" maybe_old_linkable
have_object
| Just l <- maybe_old_linkable, isObjectLinkable l = True
| otherwise = False
- compresult <- compile ghci_mode summary1 source_unchanged
- have_object old_iface hst1_strictDC hit1_strictDC pcs1
+ compresult <- compile ghci_mode this_mod location source_unchanged
+ have_object mb_old_iface hpt1_strictDC pcs1
case compresult of
-- linkable (depending on whether compilation was actually performed
-- or not).
CompOK pcs2 new_details new_iface maybe_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, if isJust maybe_new_linkable
- then maybe_new_linkable
- else Just old_linkable)
-
- -- Compilation failed. compile may still have updated
- -- the PCS, tho.
- CompErrs pcs2
- -> do let threaded2 = CmThreaded pcs2 hst1 hit1
- return (threaded2, Nothing)
-
--- Filter modules in the top level envs (HST, HIT, 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)]
+ -> do let
+ new_linkable = maybe_new_linkable `orElse` old_linkable
+ new_info = HomeModInfo { hm_iface = new_iface,
+ hm_details = new_details,
+ hm_linkable = new_linkable }
+ hpt2 = extendModuleEnv hpt1 this_mod new_info
+
+ return (Succeeded, CmThreaded pcs2 hpt2)
+
+ -- Compilation failed. Compile may still have updated the PCS, tho.
+ CompErrs pcs2 -> return (Failed, CmThreaded pcs2 hpt1)
+
+-- Filter modules in the HPT
+retainInTopLevelEnvs :: [ModuleName] -> HomePackageTable -> HomePackageTable
+retainInTopLevelEnvs keep_these hpt
+ = listToUFM (concatMap (maybeLookupUFM hpt) keep_these)
+ where
+ 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
+-- Needed to clean up HPT 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])
downsweep :: [FilePath] -> [ModSummary] -> IO [ModSummary]
downsweep roots old_summaries
= do rootSummaries <- mapM getRootSummary roots
+ checkDuplicates rootSummaries
all_summaries
- <- loop (concat (map ms_imps rootSummaries))
+ <- loop (concat (map (\ m -> zip (repeat (fromMaybe "<unknown>" (ml_hs_file (ms_location m))))
+ (ms_imps m)) rootSummaries))
(mkModuleEnv [ (mod, s) | s <- rootSummaries,
let mod = ms_mod s, isHomeModule mod
])
exists <- doesFileExist lhs_file
if exists then summariseFile lhs_file else do
let mod_name = mkModuleName file
- maybe_summary <- getSummary mod_name
+ maybe_summary <- getSummary (file, mod_name)
case maybe_summary of
Nothing -> packageModErr mod_name
Just s -> return s
hs_file = file ++ ".hs"
lhs_file = file ++ ".lhs"
- getSummary :: ModuleName -> IO (Maybe ModSummary)
- getSummary nm
+ -- In a root module, the filename is allowed to diverge from the module
+ -- name, so we have to check that there aren't multiple root files
+ -- defining the same module (otherwise the duplicates will be silently
+ -- ignored, leading to confusing behaviour).
+ checkDuplicates :: [ModSummary] -> IO ()
+ checkDuplicates summaries = mapM_ check summaries
+ where check summ =
+ case dups of
+ [] -> return ()
+ [_one] -> return ()
+ many -> multiRootsErr modl many
+ where modl = ms_mod summ
+ dups =
+ [ fromJust (ml_hs_file (ms_location summ'))
+ | summ' <- summaries, ms_mod summ' == modl ]
+
+ getSummary :: (FilePath,ModuleName) -> IO (Maybe ModSummary)
+ getSummary (currentMod,nm)
= do found <- findModule nm
case found of
- Just (mod, location) -> do
+ Right (mod, location) -> do
let old_summary = findModInSummaries old_summaries mod
summarise mod location old_summary
- Nothing -> throwDyn (CmdLineError
- ("can't find module `"
- ++ showSDoc (ppr nm) ++ "'"))
+ Left files -> do
+ dflags <- getDynFlags
+ throwDyn (noModError dflags currentMod nm files)
-- loop invariant: env doesn't contain package modules
- loop :: [ModuleName] -> ModuleEnv ModSummary -> IO [ModSummary]
+ loop :: [(FilePath,ModuleName)] -> ModuleEnv ModSummary -> IO [ModSummary]
loop [] env = return (moduleEnvElts env)
loop imps env
= do -- imports for modules we don't already have
- let needed_imps = nub (filter (not . (`elemUFM` env)) imps)
+ let needed_imps = nub (filter (not . (`elemUFM` env).snd) imps)
-- summarise them
needed_summaries <- mapM getSummary needed_imps
let new_home_summaries = [ s | Just s <- needed_summaries ]
-- loop, checking the new imports
- let new_imps = concat (map ms_imps new_home_summaries)
+ let new_imps = concat (map (\ m -> zip (repeat (fromMaybe "<unknown>" (ml_hs_file (ms_location m))))
+ (ms_imps m)) new_home_summaries)
loop new_imps (extendModuleEnvList env
[ (ms_mod s, s) | s <- new_home_summaries ])
+-- ToDo: we don't have a proper line number for this error
+noModError dflags loc mod_nm files = ProgramError (showSDoc (
+ hang (text loc <> colon) 4 $
+ (text "Can't find module" <+> quotes (ppr mod_nm) $$ extra)
+ ))
+ where
+ extra
+ | verbosity dflags < 3 =
+ text "(use -v to see a list of the files searched for)"
+ | otherwise =
+ hang (ptext SLIT("locations searched:")) 4 (vcat (map text files))
+
-----------------------------------------------------------------------------
-- Summarising modules
= do hspp_fn <- preprocess file
(srcimps,imps,mod_name) <- getImportsFromFile hspp_fn
- let (path, basename, _ext) = splitFilename3 file
+ let -- GHC.Prim doesn't exist physically, so don't go looking for it.
+ the_imps = filter (/= gHC_PRIM_Name) imps
- (mod, location)
- <- mkHomeModuleLocn mod_name (path ++ '/':basename) file
+ (mod, location) <- mkHomeModLocation mod_name file
src_timestamp
<- case ml_hs_file location of
Nothing -> noHsFileErr mod_name
Just src_fn -> getModificationTime src_fn
- return (ModSummary mod
- location{ml_hspp_file=Just hspp_fn}
- srcimps imps src_timestamp)
+ return (ModSummary { ms_mod = mod,
+ ms_location = location{ml_hspp_file=Just hspp_fn},
+ ms_srcimps = srcimps, ms_imps = the_imps,
+ ms_hs_date = src_timestamp })
-- Summarise a module, and pick up source and timestamp.
-summarise :: Module -> ModuleLocation -> Maybe ModSummary
+summarise :: Module -> ModLocation -> Maybe ModSummary
-> IO (Maybe ModSummary)
summarise mod location old_summary
| not (isHomeModule mod) = return Nothing
| otherwise
- = do let hs_fn = unJust "summarise" (ml_hs_file location)
+ = do let hs_fn = expectJust "summarise" (ml_hs_file location)
case ml_hs_file location of {
Nothing -> noHsFileErr mod;
hspp_fn <- preprocess hs_fn
(srcimps,imps,mod_name) <- getImportsFromFile hspp_fn
+ let
+ -- GHC.Prim doesn't exist physically, so don't go looking for it.
+ the_imps = filter (/= gHC_PRIM_Name) imps
when (mod_name /= moduleName mod) $
throwDyn (ProgramError
<+> quotes (ppr (moduleName mod)))))
return (Just (ModSummary mod location{ml_hspp_file=Just hspp_fn}
- srcimps imps src_timestamp))
+ srcimps the_imps src_timestamp))
}
}
= throwDyn (CmdLineError (showSDoc (text "module" <+>
quotes (ppr mod) <+>
text "is a package module")))
+
+multiRootsErr mod files
+ = throwDyn (ProgramError (showSDoc (
+ text "module" <+> quotes (ppr mod) <+>
+ text "is defined in multiple files:" <+>
+ sep (map text files))))
+\end{code}
+
+
+%************************************************************************
+%* *
+ The ModSummary Type
+%* *
+%************************************************************************
+
+\begin{code}
+-- The ModLocation contains both the original source filename and the
+-- filename of the cleaned-up source file after all preprocessing has been
+-- done. The point is that the summariser will have to cpp/unlit/whatever
+-- all files anyway, and there's no point in doing this twice -- just
+-- park the result in a temp file, put the name of it in the location,
+-- and let @compile@ read from that file on the way back up.
+
+
+type ModuleGraph = [ModSummary] -- the module graph, topologically sorted
+
+emptyMG :: ModuleGraph
+emptyMG = []
+
+data ModSummary
+ = ModSummary {
+ ms_mod :: Module, -- name, package
+ ms_location :: ModLocation, -- location
+ ms_srcimps :: [ModuleName], -- source imports
+ ms_imps :: [ModuleName], -- non-source imports
+ ms_hs_date :: ClockTime -- timestamp of summarised file
+ }
+
+instance Outputable ModSummary where
+ ppr ms
+ = sep [text "ModSummary {",
+ nest 3 (sep [text "ms_hs_date = " <> text (show (ms_hs_date ms)),
+ text "ms_mod =" <+> ppr (ms_mod ms) <> comma,
+ text "ms_imps =" <+> ppr (ms_imps ms),
+ text "ms_srcimps =" <+> ppr (ms_srcimps ms)]),
+ char '}'
+ ]
+
+ms_allimps ms = ms_srcimps ms ++ ms_imps ms
+
+modSummaryName :: ModSummary -> ModuleName
+modSummaryName = moduleName . ms_mod
\end{code}
projects / ghc-hetmet.git / blobdiff