\begin{code}
{-# OPTIONS -fvia-C #-}
module CompManager (
- ModuleGraph,
+ ModuleGraph, ModSummary(..),
- CmState, emptyCmState, -- abstract
+ CmState, -- abstract
- cmInit, -- :: GhciMode -> IO CmState
+ cmInit, -- :: GhciMode -> DynFlags -> IO CmState
cmDepAnal, -- :: CmState -> DynFlags -> [FilePath] -> IO ModuleGraph
cmCompileExpr, -- :: CmState -> DynFlags -> String
-- -> IO (CmState, Maybe HValue)
- cmGetModuleGraph, -- :: CmState -> ModuleGraph
- cmGetLinkables, -- :: CmState -> [Linkable]
+ cmGetModInfo, -- :: CmState -> (ModuleGraph, HomePackageTable)
+ cmSetDFlags,
cmGetBindings, -- :: CmState -> [TyThing]
cmGetPrintUnqual, -- :: CmState -> PrintUnqualified
#endif
-
- -- utils
- showModMsg, --
)
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 HscMain ( newHscEnv )
+import DriverState ( v_Output_file, v_NoHsMain, v_MainModIs )
import DriverPhases
-import DriverUtil
import Finder
-#ifdef GHCI
-import HscMain ( initPersistentCompilerState, hscThing,
- hscModuleContents )
-#else
-import HscMain ( initPersistentCompilerState )
-#endif
-import HscTypes hiding ( moduleNameToModule )
-import Name ( Name, NamedThing(..), nameRdrName, nameModule,
- isHomePackageName, isExternalName )
-import NameEnv
+import HscTypes
import PrelNames ( gHC_PRIM_Name )
-import Rename ( mkGlobalContext )
-import RdrName ( emptyRdrEnv )
-import Module
+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 )
+import Maybes ( expectJust, orElse, mapCatMaybes )
-import IOExts
+import DATA_IOREF ( readIORef )
#ifdef GHCI
-import RdrName ( lookupRdrEnv )
-import Id ( idType, idName )
+import HscMain ( hscThing, hscStmt, hscTcExpr )
+import TcRnDriver ( mkExportEnv, getModuleContents )
+import IfaceSyn ( IfaceDecl )
+import RdrName ( GlobalRdrEnv, plusGlobalRdrEnv )
+import Name ( Name )
+import NameEnv
+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 )
+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
+ cm_hsc :: HscEnv, -- Includes the home-package table
+ cm_mg :: ModuleGraph, -- The module graph
+ cm_ic :: InteractiveContext -- Command-line binding info
}
-emptyCmState :: GhciMode -> IO CmState
-emptyCmState gmode
- = do pcs <- initPersistentCompilerState
- pls <- emptyPLS
- return (CmState { hst = emptySymbolTable,
- hit = emptyIfaceTable,
- ui = emptyUI,
- 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 = []
+#ifdef GHCI
+cmGetModInfo cmstate = (cm_mg cmstate, hsc_HPT (cm_hsc cmstate))
+cmGetBindings cmstate = nameEnvElts (ic_type_env (cm_ic cmstate))
+cmGetPrintUnqual cmstate = icPrintUnqual (cm_ic cmstate)
+cmHPT cmstate = hsc_HPT (cm_hsc cmstate)
+#endif
------------------------------------------------------------------------------
--- Produce an initial CmState.
+cmInit :: GhciMode -> DynFlags -> IO CmState
+cmInit ghci_mode dflags
+ = do { hsc_env <- newHscEnv ghci_mode dflags
+ ; return (CmState { cm_hsc = hsc_env,
+ cm_mg = emptyMG,
+ cm_ic = emptyInteractiveContext })}
+
+discardCMInfo :: CmState -> CmState
+-- Forget the compilation manager's state, including the home package table
+-- but retain the persistent info in HscEnv
+discardCMInfo cm_state
+ = cm_state { cm_mg = emptyMG, cm_ic = emptyInteractiveContext,
+ cm_hsc = (cm_hsc cm_state) { hsc_HPT = emptyHomePackageTable } }
+
+-------------------------------------------------------------------
+-- 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.
-cmInit :: GhciMode -> IO CmState
-cmInit mode = emptyCmState mode
+type UnlinkedImage = [Linkable] -- the unlinked images (should be a set, really)
------------------------------------------------------------------------------
--- Grab information from the CmState
+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)
+\end{code}
-cmGetModuleGraph = mg
-cmGetLinkables = ui
-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
-- module. They always shadow anything in scope in the current context.
cmSetContext
- :: CmState -> DynFlags
+ :: CmState
-> [String] -- take the top-level scopes of these modules
-> [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
-
- toplev_mods <- mapM (getTopLevModule hit) (map mkModuleName toplevs)
- export_mods <- mapM (moduleNameToModule hit) (map mkModuleName exports)
-
- (new_pcs, print_unqual, maybe_env)
- <- mkGlobalContext dflags hit hst pcs toplev_mods export_mods
-
- case maybe_env of
- 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 } }
-
-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)
- _not_a_home_module -> do
- maybe_stuff <- findModule mn
- case maybe_stuff of
- Nothing -> throwDyn (CmdLineError ("can't find module `"
- ++ moduleNameUserString mn ++ "'"))
- Just (m,_) -> return m
+cmSetContext cmstate toplevs exports = do
+ let old_ic = cm_ic cmstate
+ hsc_env = cm_hsc cmstate
+ hpt = hsc_HPT hsc_env
+
+ export_env <- mkExportEnv hsc_env (map mkModuleName exports)
+ toplev_envs <- mapM (mkTopLevEnv hpt) toplevs
+
+ let all_env = foldr plusGlobalRdrEnv export_env toplev_envs
+ return cmstate{ cm_ic = old_ic { ic_toplev_scope = toplevs,
+ ic_exports = exports,
+ ic_rn_gbl_env = all_env } }
+
+mkTopLevEnv :: HomePackageTable -> String -> IO GlobalRdrEnv
+mkTopLevEnv hpt mod
+ = case lookupModuleEnvByName hpt (mkModuleName mod) of
+ Nothing -> throwDyn (ProgramError ("mkTopLevEnv: not a home module " ++ mod))
+ Just details -> case hm_globals details of
+ Nothing -> throwDyn (ProgramError ("mkTopLevEnv: not interpreted " ++ mod))
+ Just env -> return env
cmGetContext :: CmState -> IO ([String],[String])
-cmGetContext CmState{ic=ic} =
- return (map moduleUserString (ic_toplev_scope ic),
- map moduleUserString (ic_exports ic))
+cmGetContext CmState{cm_ic=ic} =
+ return (ic_toplev_scope ic, ic_exports 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 (cmHPT cmstate) (mkModuleName str) of
+ Just details -> return (isJust (hm_globals details))
_not_a_home_module -> return False
-----------------------------------------------------------------------------
+cmSetDFlags :: CmState -> DynFlags -> CmState
+cmSetDFlags cm_state dflags
+ = cm_state { cm_hsc = (cm_hsc cm_state) { hsc_dflags = dflags } }
+
+-----------------------------------------------------------------------------
-- cmInfoThing: convert a String to a TyThing
-- 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
- 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
- | isExternalName name,
- Just iface <- lookupModuleEnv iface_table (nameModule name),
- Just fixity <- lookupNameEnv (mi_fixities iface) name
- = fixity
- | otherwise
- = defaultFixity
- where iface_table | isHomePackageName name = hit
- | otherwise = pcs_PIT pcs
-#endif
+cmInfoThing :: CmState -> String -> IO [(IfaceDecl,Fixity)]
+cmInfoThing cmstate id
+ = hscThing (cm_hsc cmstate) (cm_ic cmstate) id
-- ---------------------------------------------------------------------------
-- 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
- (pcs1, maybe_ty_things)
- <- hscModuleContents dflags hst hit 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
+cmBrowseModule :: CmState -> String -> Bool -> IO [IfaceDecl]
+cmBrowseModule cmstate str exports_only
+ = do { mb_decls <- getModuleContents (cm_hsc cmstate) (cm_ic cmstate)
+ (mkModuleName str) exports_only
+ ; case mb_decls of
+ Nothing -> return [] -- An error of some kind
+ Just ds -> return ds
+ }
+
-----------------------------------------------------------------------------
-- 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 }
- dflags expr
+cmRunStmt :: CmState -> String -> IO (CmState, CmRunResult)
+cmRunStmt cmstate@CmState{ cm_hsc=hsc_env, cm_ic=icontext } expr
= do
- let InteractiveContext {
- ic_rn_local_env = rn_env,
- ic_type_env = type_env } = icontext
-
- (new_pcs, maybe_stuff)
- <- hscStmt dflags hst hit pcs icontext expr False{-stmt-}
+ maybe_stuff <- hscStmt hsc_env 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]
-
- new_ic = icontext { ic_rn_local_env = new_rn_env,
- ic_type_env = new_type_env }
-
- -- link it
- hval <- linkExpr pls bcos
+ Nothing -> return (cmstate, CmRunFailed)
+ Just (new_ic, names, hval) -> do
- -- 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, 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{ cm_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-}
-
- let new_cmstate = cmstate{pcs = new_pcs}
+cmTypeOfExpr :: CmState -> String -> IO (Maybe String)
+cmTypeOfExpr cmstate expr
+ = do maybe_stuff <- hscTcExpr (cm_hsc cmstate) (cm_ic cmstate) expr
case maybe_stuff of
- Nothing -> return (new_cmstate, Nothing)
- Just (_, ty, _) -> return (new_cmstate, Just str)
+ Nothing -> return Nothing
+ Just ty -> return (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 (cm_ic cmstate)
tidy_ty = tidyType emptyTidyEnv ty
- where
- CmState{ hst=hst, hit=hit, pcs=pcs, ic=ic } = cmstate
-#endif
+
-----------------------------------------------------------------------------
-- 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
- Nothing -> return Nothing
+cmTypeOfName CmState{ cm_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
+cmCompileExpr :: CmState -> String -> IO (Maybe HValue)
+cmCompileExpr cmstate expr
= do
- let InteractiveContext {
- ic_rn_local_env = rn_env,
- ic_type_env = type_env } = icontext
-
- (new_pcs, maybe_stuff)
- <- hscStmt dflags hst hit pcs icontext
- ("let __cmCompileExpr = "++expr) False{-stmt-}
+ maybe_stuff
+ <- hscStmt (cm_hsc cmstate) (cm_ic cmstate)
+ ("let __cmCompileExpr = "++expr)
case maybe_stuff of
- Nothing -> return (cmstate{ pcs=new_pcs }, Nothing)
- Just (ids, _, bcos) -> do
+ Nothing -> return Nothing
+ Just (new_ic, names, hval) -> do
- -- link it
- hval <- linkExpr pls bcos
+ -- Run it!
+ hvals <- (unsafeCoerce# hval) :: IO [HValue]
- -- run it!
- let thing_to_run = unsafeCoerce# hval :: IO [HValue]
- hvals <- thing_to_run
+ case (names,hvals) of
+ ([n],[hv]) -> return (Just hv)
+ _ -> panic "cmCompileExpr"
- case (ids,hvals) of
- ([id],[hv]) -> return (cmstate{ pcs=new_pcs }, Just hv)
- _ -> panic "cmCompileExpr"
+#endif /* GHCI */
+\end{code}
- where
- CmState{ hst=hst, hit=hit, pcs=pcs, pls=pls, ic=icontext } = cmstate
-#endif
+%************************************************************************
+%* *
+ 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 :: CmState -> IO CmState
+cmUnload state@CmState{ cm_hsc = hsc_env }
= 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 hsc_env []
-- Start with a fresh CmState, but keep the PersistentCompilerState
- new_state <- cmInit mode
- return new_state{ pcs=pcs, pls=new_pls }
+ return (discardCMInfo state)
+cm_unload hsc_env linkables
+ = case hsc_mode hsc_env of
+ Batch -> return ()
+#ifdef GHCI
+ Interactive -> Linker.unload (hsc_dflags hsc_env) linkables
+#else
+ Interactive -> 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.
-
-cmDepAnal :: CmState -> DynFlags -> [FilePath] -> IO ModuleGraph
-cmDepAnal cmstate dflags rootnames
+-- 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 -> [FilePath] -> IO ModuleGraph
+cmDepAnal cmstate rootnames
= do showPass dflags "Chasing dependencies"
- when (verbosity dflags >= 1 && gmode cmstate == Batch) $
+ when (verbosity dflags >= 1 && gmode == 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)
+ downsweep rootnames (cm_mg cmstate)
+ where
+ hsc_env = cm_hsc cmstate
+ dflags = hsc_dflags hsc_env
+ gmode = hsc_mode hsc_env
-----------------------------------------------------------------------------
-- 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.
-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
+ -> ModuleGraph -- Bang up to date
+ -> IO (CmState, -- new state
+ SuccessFlag, -- was successful
+ [String]) -- list of modules loaded
-cmLoadModules cmstate1 dflags mg2unsorted
+cmLoadModules cmstate1 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 ghci_mode = gmode cmstate1 -- this never changes
+ let hsc_env = cm_hsc cmstate1
+ let hpt1 = hsc_HPT hsc_env
+ let ghci_mode = hsc_mode hsc_env -- this never changes
+ let dflags = hsc_dflags hsc_env -- this never changes
-- Do the downsweep to reestablish the module graph
let verb = verbosity dflags
-- Find out if we have a Main module
- let a_root_is_Main
- = any ((=="Main").moduleNameUserString.modSummaryName)
+ mb_main_mod <- readIORef v_MainModIs
+ let
+ main_mod = mb_main_mod `orElse` "Main"
+ a_root_is_Main
+ = any ((==main_mod).moduleNameUserString.modSummaryName)
mg2unsorted
let mg2unsorted_names = map modSummaryName mg2unsorted
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 ghci_mode ui1
+ <- 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)
+ hsc_env2 = hsc_env { hsc_HPT = hpt2 }
-- 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 hsc_env2 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
-
-- clean up between compilations
let cleanup = cleanTempFilesExcept verb
- (ppFilesFromSummaries (flattenSCCs upsweep_these))
-
- (upsweep_complete_success, threaded3, modsUpswept, newLis)
- <- upsweep_mods ghci_mode dflags valid_linkables reachable_from
- threaded2 cleanup upsweep_these
+ (ppFilesFromSummaries (flattenSCCs mg2))
- let ui3 = add_to_ui valid_linkables newLis
- let (CmThreaded pcs3 hst3 hit3) = threaded3
+ (upsweep_ok, hsc_env3, modsUpswept)
+ <- upsweep_mods hsc_env2 valid_linkables reachable_from
+ cleanup upsweep_these
-- 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."
+ hPutStrLn stderr ("Warning: output was redirected with -o, but no output will be generated\nbecause there is no " ++ main_mod ++ " module.")
-- link everything together
- linkresult <- link ghci_mode dflags a_root_is_Main ui3 pls2
+ linkresult <- link ghci_mode dflags do_linking (hsc_HPT hsc_env3)
- cmLoadFinish True linkresult
- hst3 hit3 ui3 modsDone ghci_mode pcs3
+ let cmstate3 = cmstate1 { cm_mg = modsDone, cm_hsc = hsc_env3 }
+ cmLoadFinish Succeeded linkresult cmstate3
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)
+ (hsc_HPT hsc_env3)
- -- 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
+ let cmstate3 = cmstate1 { cm_mg = mods_to_keep,
+ cm_hsc = hsc_env3 { hsc_HPT = hpt4 } }
+ cmLoadFinish Failed linkresult cmstate3
-- 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
- new_state <- cmInit ghci_mode
- return (new_state{ pcs=pcs, pls=new_pls }, False, [])
+cmLoadFinish ok Failed cmstate
+ = do cm_unload (cm_hsc cmstate) []
+ return (discardCMInfo cmstate, 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,
- ic = emptyInteractiveContext }
- mods_loaded = map (moduleNameUserString.modSummaryName) mods
+cmLoadFinish ok Succeeded cmstate
+ = do let new_cmstate = cmstate { cm_ic = emptyInteractiveContext }
+ mods_loaded = map (moduleNameUserString.modSummaryName)
+ (cm_mg cmstate)
return (new_cmstate, ok, mods_loaded)
--- used to fish out the preprocess output files for the purposes
--- of cleaning up.
+-- used to fish out the preprocess output files for the purposes of
+-- cleaning up. The preprocessed file *might* be the same as the
+-- source file, but that doesn't do any harm.
ppFilesFromSummaries summaries
- = [ fn | Just fn <- map toPpFile summaries ]
- where
- toPpFile sum
- | hspp /= ml_hs_file loc = hspp
- | otherwise = Nothing
- where
- loc = ms_location sum
- hspp = ml_hspp_file loc
-
+ = [ fn | Just fn <- map (ml_hspp_file.ms_location) summaries ]
-----------------------------------------------------------------------------
-- getValidLinkables
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
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
-
-
-- 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
+upsweep_mods :: HscEnv -- Includes up-to-date HPT
+ -> [Linkable] -- Valid linkables
-> (ModuleName -> [ModuleName]) -- to construct downward closures
- -> CmThreaded -- PCS & HST & HIT
-> 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,
+ HscEnv, -- With an updated HPT
+ [ModSummary]) -- Mods which succeeded
-upsweep_mods ghci_mode dflags oldUI reachable_from threaded cleanup
+upsweep_mods hsc_env oldUI reachable_from cleanup
[]
- = return (True, threaded, [], [])
+ = return (Succeeded, hsc_env, [])
-upsweep_mods ghci_mode dflags oldUI reachable_from threaded cleanup
+upsweep_mods hsc_env oldUI reachable_from 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, hsc_env, [])
-upsweep_mods ghci_mode dflags oldUI reachable_from threaded cleanup
+upsweep_mods hsc_env oldUI reachable_from cleanup
((AcyclicSCC mod):mods)
- = do --case threaded of
- -- CmThreaded pcsz hstz hitz
- -- -> putStrLn ("UPSWEEP_MOD: hit = " ++ show (map (moduleNameUserString.moduleName.mi_module) (eltsUFM hitz)))
+ = do -- putStrLn ("UPSWEEP_MOD: hpt = " ++
+ -- show (map (moduleNameUserString.moduleName.mi_module.hm_iface) (eltsUFM (hsc_HPT hsc_env)))
- (threaded1, maybe_linkable)
- <- upsweep_mod ghci_mode dflags oldUI threaded mod
- (reachable_from (modSummaryName mod))
+ (ok_flag, hsc_env1) <- upsweep_mod hsc_env oldUI 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)
- <- 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, [], [])
+ if failed ok_flag then
+ return (Failed, hsc_env1, [])
+ else do
+ (restOK, hsc_env2, modOKs)
+ <- upsweep_mods hsc_env1 oldUI reachable_from cleanup mods
+ return (restOK, hsc_env2, mod:modOKs)
-- Compile a single module. Always produce a Linkable for it if
-- successful. If no compilation happened, return the old Linkable.
-upsweep_mod :: GhciMode
- -> DynFlags
+upsweep_mod :: HscEnv
-> UnlinkedImage
- -> CmThreaded
-> ModSummary
-> [ModuleName]
- -> IO (CmThreaded, Maybe Linkable)
+ -> IO (SuccessFlag,
+ HscEnv) -- With updated HPT
-upsweep_mod ghci_mode dflags oldUI threaded1 summary1 reachable_inc_me
+upsweep_mod hsc_env oldUI 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
+ hpt1 = hsc_HPT hsc_env
- let (CmThreaded pcs1 hst1 hit1) = threaded1
- let old_iface = lookupUFM hit1 mod_name
+ 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 (/= mod_name) reachable_inc_me
- reachable_only = filter (/= (modSummaryName summary1))
- 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(hsc_mode hsc_env == Batch || all (`elemUFM` hpt1) reachable_only)
+ retainInTopLevelEnvs reachable_only hpt1
+ hsc_env_strictDC = hsc_env { hsc_HPT = hpt1_strictDC }
- old_linkable
- = expectJust "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 hsc_env_strictDC this_mod location
+ source_unchanged have_object mb_old_iface
case compresult of
-- Compilation "succeeded", and may or may not have returned a new
-- 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)]
+ CompOK new_details new_globals new_iface maybe_new_linkable
+ -> do let
+ new_linkable = maybe_new_linkable `orElse` old_linkable
+ new_info = HomeModInfo { hm_iface = new_iface,
+ hm_globals = new_globals,
+ hm_details = new_details,
+ hm_linkable = new_linkable }
+ hpt2 = extendModuleEnv hpt1 this_mod new_info
+
+ return (Succeeded, hsc_env { hsc_HPT = hpt2 })
+
+ -- Compilation failed. Compile may still have updated the PCS, tho.
+ CompErrs -> return (Failed, hsc_env)
+
+-- 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])
Nothing -> panic "reverse_topological_sort"
Just mk -> (summ, mk,
-- ignore imports not from the home package
- catMaybes (map (flip lookup key_map) m_imports))
+ mapCatMaybes (flip lookup key_map) m_imports)
edges = map toEdge summaries
key_map = zip [nm | (s,nm,imps) <- edges] [1 ..] :: [(ModuleName,Int)]
downsweep :: [FilePath] -> [ModSummary] -> IO [ModSummary]
downsweep roots old_summaries
= do rootSummaries <- mapM getRootSummary roots
+ checkDuplicates rootSummaries
all_summaries
<- loop (concat (map (\ m -> zip (repeat (fromMaybe "<unknown>" (ml_hs_file (ms_location m))))
(ms_imps m)) rootSummaries))
where
getRootSummary :: FilePath -> IO ModSummary
getRootSummary file
- | haskellish_src_file file
+ | isHaskellSrcFilename file
= do exists <- doesFileExist file
if exists then summariseFile file else do
throwDyn (CmdLineError ("can't find file `" ++ file ++ "'"))
hs_file = file ++ ".hs"
lhs_file = file ++ ".lhs"
+ -- 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) ++ "' (while processing "
- ++ show currentMod ++ ")"))
+ Left files -> do
+ dflags <- getDynFlags
+ throwDyn (noModError dflags currentMod nm files)
-- loop invariant: env doesn't contain package modules
loop :: [(FilePath,ModuleName)] -> ModuleEnv ModSummary -> IO [ModSummary]
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
- -- GHC.Prim doesn't exist physically, so don't go looking for it.
+ 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 the_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
= 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