+{-# OPTIONS -#include "Linker.h" #-}
-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.45 2001/02/13 13:09:36 sewardj Exp $
+-- $Id: InteractiveUI.hs,v 1.142 2002/12/27 12:20:06 panne Exp $
--
-- GHC Interactive User Interface
--
-- (c) The GHC Team 2000
--
-----------------------------------------------------------------------------
+module InteractiveUI (
+ interactiveUI, -- :: CmState -> [FilePath] -> [LibrarySpec] -> IO ()
+ ghciWelcomeMsg
+ ) where
-{-# OPTIONS -#include "Linker.h" #-}
-module InteractiveUI (interactiveUI) where
-
+#include "../includes/config.h"
#include "HsVersions.h"
import CompManager
-import CmStaticInfo
-import ByteCodeLink
+import HscTypes ( TyThing(..), HomeModInfo(hm_linkable), HomePackageTable,
+ isObjectLinkable )
+import HsSyn ( TyClDecl(..), ConDecl(..), Sig(..) )
+import MkIface ( ifaceTyThing )
import DriverFlags
import DriverState
-import DriverUtil
-import Type
-import Linker
-import Finder
-import Module
-import Outputable
+import DriverUtil ( remove_spaces, handle )
+import Linker ( initLinker, showLinkerState, linkLibraries,
+ linkPackages )
import Util
-import PprType {- instance Outputable Type; do not delete -}
-import Panic ( GhcException(..) )
+import Id ( isRecordSelector, recordSelectorFieldLabel,
+ isDataConWrapId, isDataConId, idName )
+import Class ( className )
+import TyCon ( tyConName, tyConClass_maybe, isPrimTyCon, DataConDetails(..) )
+import FieldLabel ( fieldLabelTyCon )
+import SrcLoc ( isGoodSrcLoc )
+import Module ( showModMsg, lookupModuleEnv )
+import Name ( Name, isHomePackageName, nameSrcLoc, nameOccName,
+ NamedThing(..) )
+import OccName ( isSymOcc )
+import BasicTypes ( defaultFixity, SuccessFlag(..) )
+import Packages
+import Outputable
+import CmdLineOpts ( DynFlag(..), DynFlags(..), getDynFlags, saveDynFlags,
+ restoreDynFlags, dopt_unset )
+import Panic ( GhcException(..), showGhcException )
import Config
-import Exception
-import Dynamic
-#ifndef NO_READLINE
-import Readline
+#ifndef mingw32_TARGET_OS
+import System.Posix
#endif
-import IOExts
+
+#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+import Control.Concurrent ( yield ) -- Used in readline loop
+import System.Console.Readline as Readline
+#endif
+
+--import SystemExts
+
+import Control.Exception as Exception
+import Data.Dynamic
+import Control.Concurrent
import Numeric
-import List
-import System
-import CPUTime
-import Directory
-import IO
-import Char
-import Monad ( when )
-
-import PrelGHC ( unsafeCoerce# )
-import PrelPack ( packString )
-import PrelByteArr
-import Foreign ( Ptr, nullPtr )
+import Data.List
+import System.Cmd
+import System.CPUTime
+import System.Environment
+import System.Directory
+import System.IO as IO
+import Data.Char
+import Control.Monad as Monad
+
+import GHC.Exts ( unsafeCoerce# )
+
+import Data.IORef ( IORef, newIORef, readIORef, writeIORef )
+
+import GHC.Posix ( setNonBlockingFD )
-----------------------------------------------------------------------------
ghciWelcomeMsg = "\
\ ___ ___ _\n\
\ / _ \\ /\\ /\\/ __(_)\n\
-\ / /_\\// /_/ / / | | GHC Interactive, version " ++ cProjectVersion ++ ", For Haskell 98.\n\
+\ / /_\\// /_/ / / | | GHC Interactive, version " ++ cProjectVersion ++ ", for Haskell 98.\n\
\/ /_\\\\/ __ / /___| | http://www.haskell.org/ghc/\n\
\\\____/\\/ /_/\\____/|_| Type :? for help.\n"
builtin_commands :: [(String, String -> GHCi Bool)]
builtin_commands = [
("add", keepGoing addModule),
+ ("browse", keepGoing browseCmd),
("cd", keepGoing changeDirectory),
("def", keepGoing defineMacro),
("help", keepGoing help),
("?", keepGoing help),
+ ("info", keepGoing info),
("load", keepGoing loadModule),
("module", keepGoing setContext),
("reload", keepGoing reloadModule),
- ("set", keepGoing setOptions),
+ ("set", keepGoing setCmd),
+ ("show", keepGoing showCmd),
("type", keepGoing typeOfExpr),
("unset", keepGoing unsetOptions),
("undef", keepGoing undefineMacro),
shortHelpText = "use :? for help.\n"
+-- NOTE: spaces at the end of each line to workaround CPP/string gap bug.
helpText = "\
\ Commands available from the prompt:\n\
-\\
-\ <expr> evaluate <expr>\n\
-\ :add <filename> add a module to the current set\n\
-\ :cd <dir> change directory to <dir>\n\
-\ :help, :? display this list of commands\n\
-\ :load <filename> load a module (and it dependents)\n\
-\ :module <mod> set the context for expression evaluation to <mod>\n\
-\ :reload reload the current module set\n\
-\ :set <option> ... set options\n\
-\ :unset <option> ... unset options\n\
-\ :type <expr> show the type of <expr>\n\
-\ :quit exit GHCi\n\
-\ :!<command> run the shell command <command>\n\
-\\
+\\n\
+\ <stmt> evaluate/run <stmt>\n\
+\ :add <filename> ... add module(s) to the current target set\n\
+\ :browse [*]<module> display the names defined by <module>\n\
+\ :cd <dir> change directory to <dir>\n\
+\ :def <cmd> <expr> define a command :<cmd>\n\
+\ :help, :? display this list of commands\n\
+\ :info [<name> ...] display information about the given names\n\
+\ :load <filename> ... load module(s) and their dependents\n\
+\ :module [+/-] [*]<mod> ... set the context for expression evaluation\n\
+\ :reload reload the current module set\n\
+\\n\
+\ :set <option> ... set options\n\
+\ :set args <arg> ... set the arguments returned by System.getArgs\n\
+\ :set prog <progname> set the value returned by System.getProgName\n\
+\\n\
+\ :show modules show the currently loaded modules\n\
+\ :show bindings show the current bindings made at the prompt\n\
+\\n\
+\ :type <expr> show the type of <expr>\n\
+\ :undef <cmd> undefine user-defined command :<cmd>\n\
+\ :unset <option> ... unset options\n\
+\ :quit exit GHCi\n\
+\ :!<command> run the shell command <command>\n\
+\\n\
\ Options for `:set' and `:unset':\n\
-\\
+\\n\
+\ +r revert top-level expressions after each evaluation\n\
\ +s print timing/memory stats after each evaluation\n\
\ +t print type after evaluation\n\
-\ +r revert top-level expressions after each evaluation\n\
\ -<flags> most GHC command line flags can also be set here\n\
\ (eg. -v2, -fglasgow-exts, etc.)\n\
\"
-interactiveUI :: CmState -> Maybe FilePath -> IO ()
-interactiveUI cmstate mod = do
- hPutStrLn stdout ghciWelcomeMsg
+interactiveUI :: CmState -> [FilePath] -> [FilePath] -> IO ()
+interactiveUI cmstate paths cmdline_objs = do
hFlush stdout
hSetBuffering stdout NoBuffering
- -- link in the available packages
- pkgs <- getPackageInfo
+ dflags <- getDynFlags
+
initLinker
- linkPackages (reverse pkgs)
- (cmstate, ok, mods) <-
- case mod of
- Nothing -> return (cmstate, True, [])
- Just m -> cmLoadModule cmstate m
+ -- link packages requested explicitly on the command-line
+ expl <- readIORef v_ExplicitPackages
+ linkPackages dflags expl
+
+ -- link libraries from the command-line
+ linkLibraries dflags cmdline_objs
+
+ -- Initialise buffering for the *interpreted* I/O system
+ cmstate <- initInterpBuffering cmstate dflags
-#ifndef NO_READLINE
+ -- We don't want the cmd line to buffer any input that might be
+ -- intended for the program, so unbuffer stdin.
+ hSetBuffering stdin NoBuffering
+
+ -- initial context is just the Prelude
+ cmstate <- cmSetContext cmstate dflags [] ["Prelude"]
+
+#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
Readline.initialize
#endif
- prel <- moduleNameToModule defaultCurrentModuleName
- writeIORef defaultCurrentModule prel
+ startGHCi (runGHCi paths dflags)
+ GHCiState{ progname = "<interactive>",
+ args = [],
+ targets = paths,
+ cmstate = cmstate,
+ options = [] }
- dflags <- getDynFlags
+#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+ Readline.resetTerminal Nothing
+#endif
- (cmstate, maybe_stuff) <- cmGetExpr cmstate dflags False prel
- "PrelHandle.hFlush PrelHandle.stdout"
- case maybe_stuff of
- Nothing -> return ()
- Just (hv,_,_) -> writeIORef flush_stdout hv
-
- (cmstate, maybe_stuff) <- cmGetExpr cmstate dflags False prel
- "PrelHandle.hFlush PrelHandle.stdout"
- case maybe_stuff of
- Nothing -> return ()
- Just (hv,_,_) -> writeIORef flush_stderr hv
-
- let this_mod = case mods of
- [] -> prel
- m:ms -> m
-
- (unGHCi runGHCi) GHCiState{ modules = mods,
- current_module = this_mod,
- target = mod,
- cmstate = cmstate,
- options = [ShowTiming],
- last_expr = Nothing}
return ()
+runGHCi :: [FilePath] -> DynFlags -> GHCi ()
+runGHCi paths dflags = do
+ read_dot_files <- io (readIORef v_Read_DotGHCi)
+
+ when (read_dot_files) $ do
+ -- Read in ./.ghci.
+ let file = "./.ghci"
+ exists <- io (doesFileExist file)
+ when exists $ do
+ dir_ok <- io (checkPerms ".")
+ file_ok <- io (checkPerms file)
+ when (dir_ok && file_ok) $ do
+ either_hdl <- io (IO.try (openFile "./.ghci" ReadMode))
+ case either_hdl of
+ Left e -> return ()
+ Right hdl -> fileLoop hdl False
+
+ when (read_dot_files) $ do
+ -- Read in $HOME/.ghci
+ either_dir <- io (IO.try (getEnv "HOME"))
+ case either_dir of
+ Left e -> return ()
+ Right dir -> do
+ cwd <- io (getCurrentDirectory)
+ when (dir /= cwd) $ do
+ let file = dir ++ "/.ghci"
+ ok <- io (checkPerms file)
+ when ok $ do
+ either_hdl <- io (IO.try (openFile file ReadMode))
+ case either_hdl of
+ Left e -> return ()
+ Right hdl -> fileLoop hdl False
+
+ -- perform a :load for files given on the GHCi command line
+ when (not (null paths)) $
+ ghciHandle showException $
+ loadModule (unwords paths)
+
+ -- enter the interactive loop
+#if defined(mingw32_TARGET_OS)
+ -- always show prompt, since hIsTerminalDevice returns True for Consoles
+ -- only, which we may or may not be running under (cf. Emacs sub-shells.)
+ interactiveLoop True
+#else
+ is_tty <- io (hIsTerminalDevice stdin)
+ interactiveLoop is_tty
+#endif
-runGHCi :: GHCi ()
-runGHCi = do
- -- read in ./.ghci
- dot_ghci <- io (IO.try (openFile "./.ghci" ReadMode))
- case dot_ghci of
- Left e -> return ()
- Right hdl -> fileLoop hdl False
-
- -- read in ~/.ghci
- home <- io (IO.try (getEnv "HOME"))
- case home of
- Left e -> return ()
- Right dir -> do
- dot_ghci <- io (IO.try (openFile (dir ++ "/.ghci") ReadMode))
- case dot_ghci of
- Left e -> return ()
- Right hdl -> fileLoop hdl False
+ -- and finally, exit
+ io $ do when (verbosity dflags > 0) $ putStrLn "Leaving GHCi."
+
+
+interactiveLoop is_tty = do
+ -- ignore ^C exceptions caught here
+ ghciHandleDyn (\e -> case e of
+ Interrupted -> ghciUnblock (interactiveLoop is_tty)
+ _other -> return ()) $ do
-- read commands from stdin
-#ifndef NO_READLINE
- readlineLoop
+#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+ if (is_tty)
+ then readlineLoop
+ else fileLoop stdin False -- turn off prompt for non-TTY input
#else
- fileLoop stdin True
+ fileLoop stdin is_tty
#endif
- -- and finally, exit
- io $ do putStrLn "Leaving GHCi."
+-- NOTE: We only read .ghci files if they are owned by the current user,
+-- and aren't world writable. Otherwise, we could be accidentally
+-- running code planted by a malicious third party.
+
+-- Furthermore, We only read ./.ghci if . is owned by the current user
+-- and isn't writable by anyone else. I think this is sufficient: we
+-- don't need to check .. and ../.. etc. because "." always refers to
+-- the same directory while a process is running.
+
+checkPerms :: String -> IO Bool
+checkPerms name =
+#ifdef mingw32_TARGET_OS
+ return True
+#else
+ DriverUtil.handle (\_ -> return False) $ do
+ st <- getFileStatus name
+ me <- getRealUserID
+ if fileOwner st /= me then do
+ putStrLn $ "WARNING: " ++ name ++ " is owned by someone else, IGNORING!"
+ return False
+ else do
+ let mode = fileMode st
+ if (groupWriteMode == (mode `intersectFileModes` groupWriteMode))
+ || (otherWriteMode == (mode `intersectFileModes` otherWriteMode))
+ then do
+ putStrLn $ "*** WARNING: " ++ name ++
+ " is writable by someone else, IGNORING!"
+ return False
+ else return True
+#endif
fileLoop :: Handle -> Bool -> GHCi ()
fileLoop hdl prompt = do
- st <- getGHCiState
- when prompt (io (hPutStr hdl (moduleUserString (current_module st) ++ "> ")))
+ cmstate <- getCmState
+ (mod,imports) <- io (cmGetContext cmstate)
+ when prompt (io (putStr (mkPrompt mod imports)))
l <- io (IO.try (hGetLine hdl))
case l of
Left e | isEOFError e -> return ()
- | otherwise -> throw e
+ | otherwise -> io (ioError e)
Right l ->
case remove_spaces l of
"" -> fileLoop hdl prompt
stringLoop :: [String] -> GHCi ()
stringLoop [] = return ()
stringLoop (s:ss) = do
- st <- getGHCiState
case remove_spaces s of
"" -> stringLoop ss
l -> do quit <- runCommand l
if quit then return () else stringLoop ss
-#ifndef NO_READLINE
+mkPrompt toplevs exports
+ = concat (intersperse " " (map ('*':) toplevs ++ exports)) ++ "> "
+
+#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
readlineLoop :: GHCi ()
readlineLoop = do
- st <- getGHCiState
- l <- io (readline (moduleUserString (current_module st) ++ "> "))
+ cmstate <- getCmState
+ (mod,imports) <- io (cmGetContext cmstate)
+ io yield
+ l <- io (readline (mkPrompt mod imports)
+ `finally` setNonBlockingFD 0)
+ -- readline sometimes puts stdin into blocking mode,
+ -- so we need to put it back for the IO library
case l of
Nothing -> return ()
Just l ->
if quit then return () else readlineLoop
#endif
--- Top level exception handler, just prints out the exception
--- and carries on.
runCommand :: String -> GHCi Bool
-runCommand c =
- ghciHandle ( \exception ->
- (case exception of
- DynException dyn ->
- case fromDynamic dyn of
- Nothing -> io (putStrLn ("*** Exception: (unknown)"))
- Just ghc_ex ->
- case ghc_ex of
- PhaseFailed phase code ->
- io ( putStrLn ("Phase " ++ phase ++ " failed (code "
- ++ show code ++ ")"))
- Interrupted -> io (putStrLn "Interrupted.")
- other -> io (putStrLn (show (ghc_ex :: GhcException)))
-
- other -> io (putStrLn ("*** Exception: " ++ show exception))
-
- ) >> return False
- ) $
-
- doCommand c
+runCommand c = ghciHandle handler (doCommand c)
+
+-- This is the exception handler for exceptions generated by the
+-- user's code; it normally just prints out the exception. The
+-- handler must be recursive, in case showing the exception causes
+-- more exceptions to be raised.
+--
+-- Bugfix: if the user closed stdout or stderr, the flushing will fail,
+-- raising another exception. We therefore don't put the recursive
+-- handler arond the flushing operation, so if stderr is closed
+-- GHCi will just die gracefully rather than going into an infinite loop.
+handler :: Exception -> GHCi Bool
+handler exception = do
+ flushInterpBuffers
+ ghciHandle handler (showException exception >> return False)
+
+showException (DynException dyn) =
+ case fromDynamic dyn of
+ Nothing -> io (putStrLn ("*** Exception: (unknown)"))
+ Just Interrupted -> io (putStrLn "Interrupted.")
+ Just (CmdLineError s) -> io (putStrLn s) -- omit the location for CmdLineError
+ Just ph@PhaseFailed{} -> io (putStrLn (showGhcException ph "")) -- ditto
+ Just other_ghc_ex -> io (print other_ghc_ex)
+
+showException other_exception
+ = io (putStrLn ("*** Exception: " ++ show other_exception))
doCommand (':' : command) = specialCommand command
-doCommand ('-':'-':_) = return False -- comments, useful in scripts
-doCommand expr
- = do expr_expanded <- expandExpr expr
- -- io (putStrLn ( "Before: " ++ expr ++ "\nAfter: " ++ expr_expanded))
- expr_ok <- timeIt (do stuff <- evalExpr expr_expanded
- finishEvalExpr stuff)
- when expr_ok (rememberExpr expr_expanded)
+doCommand stmt
+ = do timeIt (do nms <- runStmt stmt; finishEvalExpr nms)
return False
+runStmt :: String -> GHCi [Name]
+runStmt stmt
+ | null (filter (not.isSpace) stmt) = return []
+ | otherwise
+ = do st <- getGHCiState
+ dflags <- io getDynFlags
+ let dflags' = dopt_unset dflags Opt_WarnUnusedBinds
+ (new_cmstate, result) <-
+ io $ withProgName (progname st) $ withArgs (args st) $
+ cmRunStmt (cmstate st) dflags' stmt
+ setGHCiState st{cmstate = new_cmstate}
+ case result of
+ CmRunFailed -> return []
+ CmRunException e -> showException e >> return []
+ CmRunOk names -> return names
+
-- possibly print the type and revert CAFs after evaluating an expression
-finishEvalExpr Nothing = return False
-finishEvalExpr (Just (unqual,ty))
+finishEvalExpr names
= do b <- isOptionSet ShowType
- io (when b (printForUser stdout unqual (text "::" <+> ppr ty)))
+ cmstate <- getCmState
+ when b (mapM_ (showTypeOfName cmstate) names)
+
+ flushInterpBuffers
b <- isOptionSet RevertCAFs
io (when b revertCAFs)
return True
--- Returned Maybe indicates whether or not the expr was successfully
--- parsed, renamed and typechecked.
-evalExpr :: String -> GHCi (Maybe (PrintUnqualified,Type))
-evalExpr expr
- | null (filter (not.isSpace) expr)
- = return Nothing
- | otherwise
- = do st <- getGHCiState
- dflags <- io (getDynFlags)
- (new_cmstate, maybe_stuff) <-
- io (cmGetExpr (cmstate st) dflags True (current_module st) expr)
- setGHCiState st{cmstate = new_cmstate}
- case maybe_stuff of
- Nothing -> return Nothing
- Just (hv, unqual, ty) -> do io (cmRunExpr hv)
- flushEverything
- return (Just (unqual,ty))
-
-flushEverything :: GHCi ()
-flushEverything
- = io $ do flush_so <- readIORef flush_stdout
- cmRunExpr flush_so
- flush_se <- readIORef flush_stdout
- cmRunExpr flush_se
+showTypeOfName :: CmState -> Name -> GHCi ()
+showTypeOfName cmstate n
+ = do maybe_str <- io (cmTypeOfName cmstate n)
+ case maybe_str of
+ Nothing -> return ()
+ Just str -> io (putStrLn (showSDoc (ppr n) ++ " :: " ++ str))
specialCommand :: String -> GHCi Bool
specialCommand ('!':str) = shellEscape (dropWhile isSpace str)
foldr1 (\a b -> a ++ ',':b) (map fst cs)
++ ")") >> return False)
-noArgs c = io (hPutStrLn stdout ("command `:" ++ c ++ "' takes no arguments"))
+noArgs c = throwDyn (CmdLineError ("command `" ++ c ++ "' takes no arguments"))
+
+
+-----------------------------------------------------------------------------
+-- To flush buffers for the *interpreted* computation we need
+-- to refer to *its* stdout/stderr handles
+
+GLOBAL_VAR(flush_interp, error "no flush_interp", IO ())
+GLOBAL_VAR(turn_off_buffering, error "no flush_stdout", IO ())
+
+no_buf_cmd = "IO.hSetBuffering IO.stdout IO.NoBuffering" ++
+ " Prelude.>> IO.hSetBuffering IO.stderr IO.NoBuffering"
+flush_cmd = "IO.hFlush IO.stdout Prelude.>> IO.hFlush IO.stderr"
+
+initInterpBuffering :: CmState -> DynFlags -> IO CmState
+initInterpBuffering cmstate dflags
+ = do (cmstate, maybe_hval) <- cmCompileExpr cmstate dflags no_buf_cmd
+
+ case maybe_hval of
+ Just hval -> writeIORef turn_off_buffering (unsafeCoerce# hval :: IO ())
+ other -> panic "interactiveUI:setBuffering"
+
+ (cmstate, maybe_hval) <- cmCompileExpr cmstate dflags flush_cmd
+ case maybe_hval of
+ Just hval -> writeIORef flush_interp (unsafeCoerce# hval :: IO ())
+ _ -> panic "interactiveUI:flush"
+
+ turnOffBuffering -- Turn it off right now
+
+ return cmstate
+
+
+flushInterpBuffers :: GHCi ()
+flushInterpBuffers
+ = io $ do Monad.join (readIORef flush_interp)
+ return ()
+
+turnOffBuffering :: IO ()
+turnOffBuffering
+ = do Monad.join (readIORef turn_off_buffering)
+ return ()
-----------------------------------------------------------------------------
-- Commands
help :: String -> GHCi ()
help _ = io (putStr helpText)
+info :: String -> GHCi ()
+info "" = throwDyn (CmdLineError "syntax: `:i <thing-you-want-info-about>'")
+info s = do
+ let names = words s
+ init_cms <- getCmState
+ dflags <- io getDynFlags
+ let
+ infoThings cms [] = return cms
+ infoThings cms (name:names) = do
+ (cms, stuff) <- io (cmInfoThing cms dflags name)
+ io (putStrLn (showSDocForUser unqual (
+ vcat (intersperse (text "") (map showThing stuff))))
+ )
+ infoThings cms names
+
+ unqual = cmGetPrintUnqual init_cms
+
+ showThing (ty_thing, fixity)
+ = vcat [ text "-- " <> showTyThing ty_thing,
+ showFixity fixity (getName ty_thing),
+ ppr (ifaceTyThing ty_thing) ]
+
+ showFixity fix name
+ | fix == defaultFixity = empty
+ | otherwise = ppr fix <+>
+ (if isSymOcc (nameOccName name)
+ then ppr name
+ else char '`' <> ppr name <> char '`')
+
+ showTyThing (AClass cl)
+ = hcat [ppr cl, text " is a class", showSrcLoc (className cl)]
+ showTyThing (ATyCon ty)
+ | isPrimTyCon ty
+ = hcat [ppr ty, text " is a primitive type constructor"]
+ | otherwise
+ = hcat [ppr ty, text " is a type constructor", showSrcLoc (tyConName ty)]
+ showTyThing (AnId id)
+ = hcat [ppr id, text " is a ", idDescr id, showSrcLoc (idName id)]
+
+ idDescr id
+ | isRecordSelector id =
+ case tyConClass_maybe (fieldLabelTyCon (
+ recordSelectorFieldLabel id)) of
+ Nothing -> text "record selector"
+ Just c -> text "method in class " <> ppr c
+ | isDataConWrapId id = text "data constructor"
+ | otherwise = text "variable"
+
+ -- also print out the source location for home things
+ showSrcLoc name
+ | isHomePackageName name && isGoodSrcLoc loc
+ = hsep [ text ", defined at", ppr loc ]
+ | otherwise
+ = empty
+ where loc = nameSrcLoc name
+
+ cms <- infoThings init_cms names
+ setCmState cms
+ return ()
+
addModule :: String -> GHCi ()
-addModule _ = throwDyn (OtherError ":add not implemented")
-
-setContext :: String -> GHCi ()
-setContext ""
- = throwDyn (OtherError "syntax: `:m <module>'")
-setContext m | not (isUpper (head m)) || not (all isAlphaNum (tail m))
- = throwDyn (OtherError ("strange looking module name: `" ++ m ++ "'"))
-setContext mn
- = do m <- io (moduleNameToModule (mkModuleName mn))
- st <- getGHCiState
- if (isHomeModule m && m `notElem` modules st)
- then throwDyn (OtherError (showSDoc (quotes (ppr (moduleName m))
- <+> text "is not currently loaded, use :load")))
- else setGHCiState st{current_module = m}
-
-moduleNameToModule :: ModuleName -> IO Module
-moduleNameToModule mn
- = do maybe_stuff <- findModule mn
- case maybe_stuff of
- Nothing -> throwDyn (OtherError ("can't find module `"
- ++ moduleNameUserString mn ++ "'"))
- Just (m,_) -> return m
+addModule str = do
+ let files = words str
+ state <- getGHCiState
+ dflags <- io (getDynFlags)
+ io (revertCAFs) -- always revert CAFs on load/add.
+ let new_targets = files ++ targets state
+ graph <- io (cmDepAnal (cmstate state) dflags new_targets)
+ (cmstate1, ok, mods) <- io (cmLoadModules (cmstate state) dflags graph)
+ setGHCiState state{ cmstate = cmstate1, targets = new_targets }
+ setContextAfterLoad mods
+ modulesLoadedMsg ok mods dflags
changeDirectory :: String -> GHCi ()
+changeDirectory ('~':d) = do
+ tilde <- io (getEnv "HOME") -- will fail if HOME not defined
+ io (setCurrentDirectory (tilde ++ '/':d))
changeDirectory d = io (setCurrentDirectory d)
defineMacro :: String -> GHCi ()
let (macro_name, definition) = break isSpace s
cmds <- io (readIORef commands)
if (null macro_name)
- then throwDyn (OtherError "invalid macro name")
+ then throwDyn (CmdLineError "invalid macro name")
else do
if (macro_name `elem` map fst cmds)
- then throwDyn (OtherError
- ("command `" ++ macro_name ++ "' already defined"))
+ then throwDyn (CmdLineError
+ ("command `" ++ macro_name ++ "' is already defined"))
else do
-- give the expression a type signature, so we can be sure we're getting
let new_expr = '(' : definition ++ ") :: String -> IO String"
-- compile the expression
- st <- getGHCiState
- dflags <- io (getDynFlags)
- (new_cmstate, maybe_stuff) <-
- io (cmGetExpr (cmstate st) dflags False (current_module st) new_expr)
- setGHCiState st{cmstate = new_cmstate}
- case maybe_stuff of
+ cms <- getCmState
+ dflags <- io getDynFlags
+ (new_cmstate, maybe_hv) <- io (cmCompileExpr cms dflags new_expr)
+ setCmState new_cmstate
+ case maybe_hv of
Nothing -> return ()
- Just (hv, unqual, ty)
- -> io (writeIORef commands
- ((macro_name, keepGoing (runMacro hv)) : cmds))
+ Just hv -> io (writeIORef commands --
+ ((macro_name, keepGoing (runMacro hv)) : cmds))
runMacro :: HValue{-String -> IO String-} -> String -> GHCi ()
runMacro fun s = do
undefineMacro macro_name = do
cmds <- io (readIORef commands)
if (macro_name `elem` map fst builtin_commands)
- then throwDyn (OtherError
+ then throwDyn (CmdLineError
("command `" ++ macro_name ++ "' cannot be undefined"))
else do
if (macro_name `notElem` map fst cmds)
- then throwDyn (OtherError
+ then throwDyn (CmdLineError
("command `" ++ macro_name ++ "' not defined"))
else do
io (writeIORef commands (filter ((/= macro_name) . fst) cmds))
+
loadModule :: String -> GHCi ()
-loadModule path = timeIt (loadModule' path)
+loadModule str = timeIt (loadModule' str)
-loadModule' path = do
+loadModule' str = do
+ let files = words str
state <- getGHCiState
- cmstate1 <- io (cmUnload (cmstate state))
- io (revertCAFs) -- always revert CAFs on load.
- (cmstate2, ok, mods) <- io (cmLoadModule cmstate1 path)
-
- def_mod <- io (readIORef defaultCurrentModule)
-
- let new_state = state{
- cmstate = cmstate2,
- modules = mods,
- current_module = case mods of
- [] -> def_mod
- xs -> head xs,
- target = Just path
- }
- setGHCiState new_state
-
- let mod_commas
- | null mods = text "none."
- | otherwise = hsep (
- punctuate comma (map (text.moduleUserString) mods)) <> text "."
- case ok of
- False ->
- io (putStrLn (showSDoc (text "Failed, modules loaded: " <> mod_commas)))
- True ->
- io (putStrLn (showSDoc (text "Ok, modules loaded: " <> mod_commas)))
+ dflags <- io getDynFlags
+
+ -- do the dependency anal first, so that if it fails we don't throw
+ -- away the current set of modules.
+ graph <- io (cmDepAnal (cmstate state) dflags files)
+
+ -- Dependency anal ok, now unload everything
+ cmstate1 <- io (cmUnload (cmstate state) dflags)
+ setGHCiState state{ cmstate = cmstate1, targets = [] }
+
+ io (revertCAFs) -- always revert CAFs on load.
+ (cmstate2, ok, mods) <- io (cmLoadModules cmstate1 dflags graph)
+ setGHCiState state{ cmstate = cmstate2, targets = files }
+
+ setContextAfterLoad mods
+ modulesLoadedMsg ok mods dflags
+
reloadModule :: String -> GHCi ()
reloadModule "" = do
state <- getGHCiState
- case target state of
- Nothing -> io (putStr "no current target\n")
- Just path
- -> do io (revertCAFs) -- always revert CAFs on reload.
- (new_cmstate, ok, mods) <- io (cmLoadModule (cmstate state) path)
- def_mod <- io (readIORef defaultCurrentModule)
- setGHCiState
- state{cmstate=new_cmstate,
- modules = mods,
- current_module = case mods of
- [] -> def_mod
- xs -> head xs
- }
+ dflags <- io getDynFlags
+ case targets state of
+ [] -> io (putStr "no current target\n")
+ paths -> do
+ -- do the dependency anal first, so that if it fails we don't throw
+ -- away the current set of modules.
+ graph <- io (cmDepAnal (cmstate state) dflags paths)
+
+ io (revertCAFs) -- always revert CAFs on reload.
+ (cmstate1, ok, mods)
+ <- io (cmLoadModules (cmstate state) dflags graph)
+ setGHCiState state{ cmstate=cmstate1 }
+ setContextAfterLoad mods
+ modulesLoadedMsg ok mods dflags
reloadModule _ = noArgs ":reload"
+setContextAfterLoad [] = setContext prel
+setContextAfterLoad (m:_) = do
+ cmstate <- getCmState
+ b <- io (cmModuleIsInterpreted cmstate m)
+ if b then setContext ('*':m) else setContext m
+
+modulesLoadedMsg ok mods dflags =
+ when (verbosity dflags > 0) $ do
+ let mod_commas
+ | null mods = text "none."
+ | otherwise = hsep (
+ punctuate comma (map text mods)) <> text "."
+ case ok of
+ Failed ->
+ io (putStrLn (showSDoc (text "Failed, modules loaded: " <> mod_commas)))
+ Succeeded ->
+ io (putStrLn (showSDoc (text "Ok, modules loaded: " <> mod_commas)))
+
+
typeOfExpr :: String -> GHCi ()
typeOfExpr str
- = do st <- getGHCiState
- dflags <- io (getDynFlags)
- (new_cmstate, maybe_ty) <- io (cmGetExpr (cmstate st) dflags False
- (current_module st) str)
- setGHCiState st{cmstate = new_cmstate}
- case maybe_ty of
- Nothing -> return ()
- Just (_, unqual, ty) -> io (printForUser stdout unqual (ppr ty))
+ = do cms <- getCmState
+ dflags <- io getDynFlags
+ (new_cmstate, maybe_tystr) <- io (cmTypeOfExpr cms dflags str)
+ setCmState new_cmstate
+ case maybe_tystr of
+ Nothing -> return ()
+ Just tystr -> io (putStrLn tystr)
quit :: String -> GHCi Bool
quit _ = return True
shellEscape :: String -> GHCi Bool
shellEscape str = io (system str >> return False)
+-----------------------------------------------------------------------------
+-- Browing a module's contents
+
+browseCmd :: String -> GHCi ()
+browseCmd m =
+ case words m of
+ ['*':m] | looksLikeModuleName m -> browseModule m False
+ [m] | looksLikeModuleName m -> browseModule m True
+ _ -> throwDyn (CmdLineError "syntax: :browse <module>")
+
+browseModule m exports_only = do
+ cms <- getCmState
+ dflags <- io getDynFlags
+
+ is_interpreted <- io (cmModuleIsInterpreted cms m)
+ when (not is_interpreted && not exports_only) $
+ throwDyn (CmdLineError ("module `" ++ m ++ "' is not interpreted"))
+
+ -- temporarily set the context to the module we're interested in,
+ -- just so we can get an appropriate PrintUnqualified
+ (as,bs) <- io (cmGetContext cms)
+ cms1 <- io (if exports_only then cmSetContext cms dflags [] [prel,m]
+ else cmSetContext cms dflags [m] [])
+ cms2 <- io (cmSetContext cms1 dflags as bs)
+
+ (cms3, things) <- io (cmBrowseModule cms2 dflags m exports_only)
+
+ setCmState cms3
+
+ let unqual = cmGetPrintUnqual cms1 -- NOTE: cms1 with the new context
+
+ things' = filter wantToSee things
+
+ wantToSee (AnId id) = not (isDataConId id || isDataConWrapId id)
+ wantToSee _ = True
+
+ thing_names = map getName things
+
+ thingDecl thing@(AnId id) = ifaceTyThing thing
+
+ thingDecl thing@(AClass c) =
+ let rn_decl = ifaceTyThing thing in
+ case rn_decl of
+ ClassDecl { tcdSigs = cons } ->
+ rn_decl{ tcdSigs = filter methodIsVisible cons }
+ other -> other
+ where
+ methodIsVisible (ClassOpSig n _ _ _) = n `elem` thing_names
+
+ thingDecl thing@(ATyCon t) =
+ let rn_decl = ifaceTyThing thing in
+ case rn_decl of
+ TyData { tcdCons = DataCons cons } ->
+ rn_decl{ tcdCons = DataCons (filter conIsVisible cons) }
+ other -> other
+ where
+ conIsVisible (ConDecl n _ _ _ _) = n `elem` thing_names
+
+ io (putStrLn (showSDocForUser unqual (
+ vcat (map (ppr . thingDecl) things')))
+ )
+
+ where
+
+-----------------------------------------------------------------------------
+-- Setting the module context
+
+setContext str
+ | all sensible mods = fn mods
+ | otherwise = throwDyn (CmdLineError "syntax: :module [+/-] [*]M1 ... [*]Mn")
+ where
+ (fn, mods) = case str of
+ '+':stuff -> (addToContext, words stuff)
+ '-':stuff -> (removeFromContext, words stuff)
+ stuff -> (newContext, words stuff)
+
+ sensible ('*':m) = looksLikeModuleName m
+ sensible m = looksLikeModuleName m
+
+newContext mods = do
+ cms <- getCmState
+ dflags <- io getDynFlags
+ (as,bs) <- separate cms mods [] []
+ let bs' = if null as && prel `notElem` bs then prel:bs else bs
+ cms' <- io (cmSetContext cms dflags as bs')
+ setCmState cms'
+
+separate cmstate [] as bs = return (as,bs)
+separate cmstate (('*':m):ms) as bs = do
+ b <- io (cmModuleIsInterpreted cmstate m)
+ if b then separate cmstate ms (m:as) bs
+ else throwDyn (CmdLineError ("module `" ++ m ++ "' is not interpreted"))
+separate cmstate (m:ms) as bs = separate cmstate ms as (m:bs)
+
+prel = "Prelude"
+
+
+addToContext mods = do
+ cms <- getCmState
+ dflags <- io getDynFlags
+ (as,bs) <- io (cmGetContext cms)
+
+ (as',bs') <- separate cms mods [] []
+
+ let as_to_add = as' \\ (as ++ bs)
+ bs_to_add = bs' \\ (as ++ bs)
+
+ cms' <- io (cmSetContext cms dflags
+ (as ++ as_to_add) (bs ++ bs_to_add))
+ setCmState cms'
+
+
+removeFromContext mods = do
+ cms <- getCmState
+ dflags <- io getDynFlags
+ (as,bs) <- io (cmGetContext cms)
+
+ (as_to_remove,bs_to_remove) <- separate cms mods [] []
+
+ let as' = as \\ (as_to_remove ++ bs_to_remove)
+ bs' = bs \\ (as_to_remove ++ bs_to_remove)
+
+ cms' <- io (cmSetContext cms dflags as' bs')
+ setCmState cms'
+
----------------------------------------------------------------------------
-- Code for `:set'
-- This is pretty fragile: most options won't work as expected. ToDo:
-- figure out which ones & disallow them.
-setOptions :: String -> GHCi ()
-setOptions ""
+setCmd :: String -> GHCi ()
+setCmd ""
= do st <- getGHCiState
let opts = options st
io $ putStrLn (showSDoc (
then text "none."
else hsep (map (\o -> char '+' <> text (optToStr o)) opts)
))
-setOptions str
- = do -- first, deal with the GHCi opts (+s, +t, etc.)
- let opts = words str
- (minus_opts, rest1) = partition isMinus opts
- (plus_opts, rest2) = partition isPlus rest1
-
- if (not (null rest2))
- then io (putStrLn ("unknown option: `" ++ head rest2 ++ "'"))
- else do
-
- mapM setOpt plus_opts
-
- -- now, the GHC flags
- io (do -- first, static flags
- leftovers <- processArgs static_flags minus_opts []
+setCmd str
+ = case words str of
+ ("args":args) -> setArgs args
+ ("prog":prog) -> setProg prog
+ wds -> setOptions wds
- -- then, dynamic flags
- dyn_flags <- readIORef v_InitDynFlags
- writeIORef v_DynFlags dyn_flags
- leftovers <- processArgs dynamic_flags leftovers []
- dyn_flags <- readIORef v_DynFlags
- writeIORef v_InitDynFlags dyn_flags
+setArgs args = do
+ st <- getGHCiState
+ setGHCiState st{ args = args }
- if (not (null leftovers))
- then throwDyn (OtherError ("unrecognised flags: " ++
+setProg [prog] = do
+ st <- getGHCiState
+ setGHCiState st{ progname = prog }
+setProg _ = do
+ io (hPutStrLn stderr "syntax: :set prog <progname>")
+
+setOptions wds =
+ do -- first, deal with the GHCi opts (+s, +t, etc.)
+ let (plus_opts, minus_opts) = partition isPlus wds
+ mapM_ setOpt plus_opts
+
+ -- now, the GHC flags
+ pkgs_before <- io (readIORef v_ExplicitPackages)
+ leftovers <- io (processArgs static_flags minus_opts [])
+ pkgs_after <- io (readIORef v_ExplicitPackages)
+
+ -- update things if the users wants more packages
+ let new_packages = pkgs_after \\ pkgs_before
+ when (not (null new_packages)) $
+ newPackages new_packages
+
+ -- don't forget about the extra command-line flags from the
+ -- extra_ghc_opts fields in the new packages
+ new_package_details <- io (getPackageDetails new_packages)
+ let pkg_extra_opts = concatMap extra_ghc_opts new_package_details
+ pkg_extra_dyn <- io (processArgs static_flags pkg_extra_opts [])
+
+ -- then, dynamic flags
+ io $ do
+ restoreDynFlags
+ leftovers <- processArgs dynamic_flags (leftovers ++ pkg_extra_dyn) []
+ saveDynFlags
+
+ if (not (null leftovers))
+ then throwDyn (CmdLineError ("unrecognised flags: " ++
unwords leftovers))
- else return ()
- )
+ else return ()
+
unsetOptions :: String -> GHCi ()
unsetOptions str
then io (putStrLn ("unknown option: `" ++ head rest2 ++ "'"))
else do
- mapM unsetOpt plus_opts
+ mapM_ unsetOpt plus_opts
-- can't do GHC flags for now
if (not (null minus_opts))
- then throwDyn (OtherError "can't unset GHC command-line flags")
+ then throwDyn (CmdLineError "can't unset GHC command-line flags")
else return ()
isMinus ('-':s) = True
optToStr ShowType = "t"
optToStr RevertCAFs = "r"
------------------------------------------------------------------------------
--- Code to do last-expression-entered stuff. (a.k.a the $$ facility)
-
--- Take a string and replace $$s in it with the last expr, if any.
-expandExpr :: String -> GHCi String
-expandExpr str
- = do mle <- getLastExpr
- return (outside mle str)
- where
- outside mle ('$':'$':cs)
- = case mle of
- Just le -> " (" ++ le ++ ") " ++ outside mle cs
- Nothing -> outside mle cs
-
- outside mle [] = []
- outside mle ('"':str) = '"' : inside2 mle str -- "
- outside mle ('\'':str) = '\'' : inside1 mle str -- '
- outside mle (c:cs) = c : outside mle cs
-
- inside2 mle ('"':cs) = '"' : outside mle cs -- "
- inside2 mle (c:cs) = c : inside2 mle cs
- inside2 mle [] = []
-
- inside1 mle ('\'':cs) = '\'': outside mle cs
- inside1 mle (c:cs) = c : inside1 mle cs
- inside1 mle [] = []
-
-
-rememberExpr :: String -> GHCi ()
-rememberExpr str
- = do let cleaned = (clean . reverse . clean . reverse) str
- let forget_me_not | null cleaned = Nothing
- | otherwise = Just cleaned
- setLastExpr forget_me_not
- where
- clean = dropWhile isSpace
+newPackages new_pkgs = do -- The new packages are already in v_Packages
+ state <- getGHCiState
+ dflags <- io getDynFlags
+ cmstate1 <- io (cmUnload (cmstate state) dflags)
+ setGHCiState state{ cmstate = cmstate1, targets = [] }
+ io (linkPackages dflags new_pkgs)
+ setContextAfterLoad []
+
+-- ---------------------------------------------------------------------------
+-- code for `:show'
+
+showCmd str =
+ case words str of
+ ["modules" ] -> showModules
+ ["bindings"] -> showBindings
+ ["linker"] -> io showLinkerState
+ _ -> throwDyn (CmdLineError "syntax: :show [modules|bindings]")
+
+showModules = do
+ cms <- getCmState
+ let (mg, hpt) = cmGetModInfo cms
+ mapM_ (showModule hpt) mg
+
+
+showModule :: HomePackageTable -> ModSummary -> GHCi ()
+showModule hpt mod_summary
+ = case lookupModuleEnv hpt mod of
+ Nothing -> panic "missing linkable"
+ Just mod_info -> io (putStrLn (showModMsg obj_linkable mod locn))
+ where
+ obj_linkable = isObjectLinkable (hm_linkable mod_info)
+ where
+ mod = ms_mod mod_summary
+ locn = ms_location mod_summary
+
+showBindings = do
+ cms <- getCmState
+ let
+ unqual = cmGetPrintUnqual cms
+ showBinding b = putStrLn (showSDocForUser unqual (ppr (ifaceTyThing b)))
+
+ io (mapM_ showBinding (cmGetBindings cms))
+ return ()
-----------------------------------------------------------------------------
data GHCiState = GHCiState
{
- modules :: [Module],
- current_module :: Module,
- target :: Maybe FilePath,
+ progname :: String,
+ args :: [String],
+ targets :: [FilePath],
cmstate :: CmState,
- options :: [GHCiOption],
- last_expr :: Maybe String
+ options :: [GHCiOption]
}
data GHCiOption
| RevertCAFs -- revert CAFs after every evaluation
deriving Eq
-defaultCurrentModuleName = mkModuleName "Prelude"
-GLOBAL_VAR(defaultCurrentModule, error "no defaultCurrentModule", Module)
-
-GLOBAL_VAR(flush_stdout, error "no flush_stdout", HValue)
-GLOBAL_VAR(flush_stderr, error "no flush_stdout", HValue)
+newtype GHCi a = GHCi { unGHCi :: IORef GHCiState -> IO a }
-newtype GHCi a = GHCi { unGHCi :: GHCiState -> IO (GHCiState, a) }
+startGHCi :: GHCi a -> GHCiState -> IO a
+startGHCi g state = do ref <- newIORef state; unGHCi g ref
instance Monad GHCi where
- (GHCi m) >>= k = GHCi $ \s -> m s >>= \(s,a) -> unGHCi (k a) s
- return a = GHCi $ \s -> return (s,a)
+ (GHCi m) >>= k = GHCi $ \s -> m s >>= \a -> unGHCi (k a) s
+ return a = GHCi $ \s -> return a
+
+ghciHandleDyn :: Typeable t => (t -> GHCi a) -> GHCi a -> GHCi a
+ghciHandleDyn h (GHCi m) = GHCi $ \s ->
+ Exception.catchDyn (m s) (\e -> unGHCi (h e) s)
+
+getGHCiState = GHCi $ \r -> readIORef r
+setGHCiState s = GHCi $ \r -> writeIORef r s
-getGHCiState = GHCi $ \s -> return (s,s)
-setGHCiState s = GHCi $ \_ -> return (s,())
+-- for convenience...
+getCmState = getGHCiState >>= return . cmstate
+setCmState cms = do s <- getGHCiState; setGHCiState s{cmstate=cms}
isOptionSet :: GHCiOption -> GHCi Bool
isOptionSet opt
= do st <- getGHCiState
setGHCiState (st{ options = filter (/= opt) (options st) })
-getLastExpr :: GHCi (Maybe String)
-getLastExpr
- = do st <- getGHCiState ; return (last_expr st)
-
-setLastExpr :: Maybe String -> GHCi ()
-setLastExpr last_expr
- = do st <- getGHCiState ; setGHCiState (st{last_expr = last_expr})
-
-io m = GHCi $ \s -> m >>= \a -> return (s,a)
+io :: IO a -> GHCi a
+io m = GHCi { unGHCi = \s -> m >>= return }
-----------------------------------------------------------------------------
-- recursive exception handlers
ghciHandle :: (Exception -> GHCi a) -> GHCi a -> GHCi a
ghciHandle h (GHCi m) = GHCi $ \s ->
Exception.catch (m s)
- (\e -> unGHCi (ghciHandle h (ghciUnblock (h e))) s)
+ (\e -> unGHCi (ghciUnblock (h e)) s)
ghciUnblock :: GHCi a -> GHCi a
ghciUnblock (GHCi a) = GHCi $ \s -> Exception.unblock (a s)
-----------------------------------------------------------------------------
--- package loader
-
-linkPackages :: [Package] -> IO ()
-linkPackages pkgs = mapM_ linkPackage pkgs
-
-linkPackage :: Package -> IO ()
--- ignore rts and gmp for now (ToDo; better?)
-linkPackage pkg
- | name pkg `elem` ["rts", "gmp"]
- = return ()
- | otherwise
- = do putStr ("Loading package " ++ name pkg ++ " ... ")
- -- For each obj, try obj.o and if that fails, obj.so.
- -- Complication: all the .so's must be loaded before any of the .o's.
- let dirs = library_dirs pkg
- let objs = hs_libraries pkg ++ extra_libraries pkg
- classifieds <- mapM (locateOneObj dirs) objs
- let sos_first = filter isRight classifieds
- ++ filter (not.isRight) classifieds
- mapM loadClassified sos_first
- putStr "linking ... "
- resolveObjs
- putStrLn "done."
- where
- isRight (Right _) = True
- isRight (Left _) = False
-
-
-loadClassified :: Either FilePath String -> IO ()
-loadClassified (Left obj_absolute_filename)
- = do --putStr ("Left " ++ obj_absolute_filename ++ "\n")
- loadObj obj_absolute_filename
-loadClassified (Right dll_unadorned)
- = do --putStr ("Right " ++ dll_unadorned ++ "\n")
- dll_ok <- ocAddDLL (packString dll_unadorned)
- if dll_ok /= 1
- then throwDyn (OtherError ("can't find .o or .so/.DLL for: "
- ++ dll_unadorned))
- else return ()
-
-locateOneObj :: [FilePath] -> String -> IO (Either FilePath String)
-locateOneObj [] obj
- = return (Right obj) -- we assume
-locateOneObj (d:ds) obj
- = do let path = d ++ '/':obj ++ ".o"
- b <- doesFileExist path
- if b then return (Left path) else locateOneObj ds obj
-
-
-type PackedString = ByteArray Int
-foreign import "ocAddDLL" unsafe ocAddDLL :: PackedString -> IO Int
-
------------------------------------------------------------------------------
-- timing & statistics
timeIt :: GHCi a -> GHCi a
io $ printTimes (allocs2 - allocs1) (time2 - time1)
return a
-foreign import "getAllocations" getAllocations :: IO Int
+foreign import ccall "getAllocations" getAllocations :: IO Int
printTimes :: Int -> Integer -> IO ()
printTimes allocs psecs
-----------------------------------------------------------------------------
-- reverting CAFs
-foreign import revertCAFs :: IO () -- make it "safe", just in case
+revertCAFs :: IO ()
+revertCAFs = do
+ rts_revertCAFs
+ turnOffBuffering
+ -- Have to turn off buffering again, because we just
+ -- reverted stdout, stderr & stdin to their defaults.
+
+foreign import ccall "revertCAFs" rts_revertCAFs :: IO ()
+ -- Make it "safe", just in case