-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.2 2000/11/16 11:39:37 simonmar Exp $
+-- $Id: InteractiveUI.hs,v 1.51 2001/02/14 11:36:07 sewardj Exp $
--
-- GHC Interactive User Interface
--
--
-----------------------------------------------------------------------------
-module InteractiveUI (interactiveUI) where
+{-# OPTIONS -#include "Linker.h" #-}
+module InteractiveUI ( interactiveUI, ghciWelcomeMsg ) where
+
+#include "HsVersions.h"
import CompManager
import CmStaticInfo
-import DriverUtil
+import ByteCodeLink
+import DriverFlags
import DriverState
+import DriverUtil
+import Type
import Linker
+import Finder
import Module
-import Panic
+import Outputable
import Util
+import PprType {- instance Outputable Type; do not delete -}
+import Panic ( GhcException(..) )
+import Config
import Exception
+import Dynamic
+#ifndef NO_READLINE
import Readline
+#endif
import IOExts
+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 ( nullPtr )
+import CString ( peekCString )
-----------------------------------------------------------------------------
ghciWelcomeMsg = "\
-\ _____ __ __ ____ _________________________________________________\n\
-\(| || || (| |) GHC Interactive, version 5.00 \n\
-\|| __ ||___|| || () For Haskell 98. \n\
-\|| |) ||---|| || || http://www.haskell.org/ghc \n\
-\|| || || || || (| Bug reports to: glasgow-haskell-bugs@haskell.org \n\
-\(|___|| || || (|__|) \\\\______________________________________________________\n"
-
-commands :: [(String, String -> GHCi ())]
-commands = [
- ("cd", changeDirectory),
- ("help", help),
- ("?", help),
- ("load", loadModule),
- ("reload", reloadModule),
- ("set", setOptions),
- ("type", typeOfExpr),
- ("quit", quit),
- ("!", shellEscape)
+\ ___ ___ _\n\
+\ / _ \\ /\\ /\\/ __(_)\n\
+\ / /_\\// /_/ / / | | GHC Interactive, version " ++ cProjectVersion ++ ", For Haskell 98.\n\
+\/ /_\\\\/ __ / /___| | http://www.haskell.org/ghc/\n\
+\\\____/\\/ /_/\\____/|_| Type :? for help.\n"
+
+GLOBAL_VAR(commands, builtin_commands, [(String, String -> GHCi Bool)])
+
+builtin_commands :: [(String, String -> GHCi Bool)]
+builtin_commands = [
+ ("add", keepGoing addModule),
+ ("cd", keepGoing changeDirectory),
+ ("def", keepGoing defineMacro),
+ ("help", keepGoing help),
+ ("?", keepGoing help),
+ ("load", keepGoing loadModule),
+ ("module", keepGoing setContext),
+ ("reload", keepGoing reloadModule),
+ ("set", keepGoing setOptions),
+ ("type", keepGoing typeOfExpr),
+ ("unset", keepGoing unsetOptions),
+ ("undef", keepGoing undefineMacro),
+ ("quit", quit)
]
+keepGoing :: (String -> GHCi ()) -> (String -> GHCi Bool)
+keepGoing a str = a str >> return False
+
shortHelpText = "use :? for help.\n"
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\
-\ :? display this list of commands\n\
+\ :help, :? display this list of commands\n\
\ :load <filename> load a module (and it dependents)\n\
-\ :reload reload the current program\n\
-\ :set <opetion> ... set options\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\
+\\
+\ Options for `:set' and `:unset':\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 -> IO ()
-interactiveUI st = do
- hPutStrLn stdout ghciWelcomeMsg
+interactiveUI :: CmState -> Maybe FilePath -> [LibrarySpec] -> IO ()
+interactiveUI cmstate mod cmdline_libs = do
hFlush stdout
hSetBuffering stdout NoBuffering
-- link in the available packages
pkgs <- getPackageInfo
- linkPackages (reverse pkgs)
+ initLinker
+ linkPackages cmdline_libs (reverse pkgs)
+
+ (cmstate, ok, mods) <-
+ case mod of
+ Nothing -> return (cmstate, True, [])
+ Just m -> cmLoadModule cmstate m
#ifndef NO_READLINE
Readline.initialize
#endif
- _ <- (unGHCi uiLoop) GHCiState{ current_module = mkModuleName "Prelude",
- target = Nothing,
- cmstate = st }
+
+ prel <- moduleNameToModule defaultCurrentModuleName
+ writeIORef defaultCurrentModule prel
+
+ dflags <- getDynFlags
+
+ (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 ()
-uiLoop :: GHCi ()
-uiLoop = do
- st <- getGHCiState
+
+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
+
+ -- read commands from stdin
#ifndef NO_READLINE
- l <- io (readline (moduleNameUserString (current_module st) ++ ">"))
+ readlineLoop
#else
- l <- io (hGetLine stdin)
+ fileLoop stdin True
#endif
- case l of
- Nothing -> return ()
- Just "" -> uiLoop
- Just l -> do
+
+ -- and finally, exit
+ io $ do putStrLn "Leaving GHCi."
+
+
+fileLoop :: Handle -> Bool -> GHCi ()
+fileLoop hdl prompt = do
+ st <- getGHCiState
+ when prompt (io (hPutStr hdl (moduleUserString (current_module st) ++ "> ")))
+ l <- io (IO.try (hGetLine hdl))
+ case l of
+ Left e | isEOFError e -> return ()
+ | otherwise -> throw e
+ Right l ->
+ case remove_spaces l of
+ "" -> fileLoop hdl prompt
+ l -> do quit <- runCommand l
+ if quit then return () else 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
- io (addHistory l)
+readlineLoop :: GHCi ()
+readlineLoop = do
+ st <- getGHCiState
+ l <- io (readline (moduleUserString (current_module st) ++ "> "))
+ case l of
+ Nothing -> return ()
+ Just l ->
+ case remove_spaces l of
+ "" -> readlineLoop
+ l -> do
+ io (addHistory l)
+ quit <- runCommand l
+ if quit then return () else readlineLoop
#endif
- runCommand l
- uiLoop
-runCommand c = myCatch (doCommand c)
- (\e -> io (hPutStr stdout ("Error: " ++ show e)))
+-- 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
doCommand (':' : command) = specialCommand command
-doCommand expr = do
- io (hPutStrLn stdout ("Run expression: " ++ expr))
- return ()
-
+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 expr_expanded stuff)
+ when expr_ok (rememberExpr expr_expanded)
+ return False
+
+-- Returns True if the expr was successfully parsed, renamed and
+-- typechecked.
+evalExpr :: String -> GHCi Bool
+evalExpr expr
+ | null (filter (not.isSpace) expr)
+ = return False
+ | 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 False
+ Just (hv, unqual, ty) ->
+ do io (cmRunExpr hv)
+ return True
+
+-- possibly print the type and revert CAFs after evaluating an expression
+finishEvalExpr _ False = return False
+finishEvalExpr expr True
+ = do b <- isOptionSet ShowType
+ -- re-typecheck, don't wrap with print this time
+ when b (io (putStr ":: ") >> typeOfExpr expr)
+ b <- isOptionSet RevertCAFs
+ io (when b revertCAFs)
+ flushEverything
+ return True
+
+flushEverything :: GHCi ()
+flushEverything
+ = io $ do flush_so <- readIORef flush_stdout
+ cmRunExpr flush_so
+ flush_se <- readIORef flush_stdout
+ cmRunExpr flush_se
+
+specialCommand :: String -> GHCi Bool
+specialCommand ('!':str) = shellEscape (dropWhile isSpace str)
specialCommand str = do
let (cmd,rest) = break isSpace str
- case [ (s,f) | (s,f) <- commands, prefixMatch cmd s ] of
- [] -> io $ hPutStr stdout ("uknown command `:" ++ cmd ++ "'\n"
- ++ shortHelpText)
- [(_,f)] -> f rest
- cs -> io $ hPutStrLn stdout ("prefix " ++ cmd ++
- " matches multiple commands (" ++
- foldr1 (\a b -> a ++ ',':b) (map fst cs) ++ ")")
+ cmds <- io (readIORef commands)
+ case [ (s,f) | (s,f) <- cmds, prefixMatch cmd s ] of
+ [] -> io (hPutStr stdout ("unknown command `:" ++ cmd ++ "'\n"
+ ++ shortHelpText) >> return False)
+ [(_,f)] -> f (dropWhile isSpace rest)
+ cs -> io (hPutStrLn stdout ("prefix " ++ cmd ++
+ " matches multiple commands (" ++
+ foldr1 (\a b -> a ++ ',':b) (map fst cs)
+ ++ ")") >> return False)
noArgs c = io (hPutStrLn stdout ("command `:" ++ c ++ "' takes no arguments"))
-----------------------------------------------------------------------------
-- Commands
--- ToDo: don't forget to catch errors
-
help :: String -> GHCi ()
help _ = io (putStr helpText)
+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 str
+ = do st <- getGHCiState
+
+ let mn = mkModuleName str
+ m <- case [ m | m <- modules st, moduleName m == mn ] of
+ (m:_) -> return m
+ [] -> io (moduleNameToModule mn)
+
+ 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
+
changeDirectory :: String -> GHCi ()
-changeDirectory = io . setCurrentDirectory
+changeDirectory d = io (setCurrentDirectory d)
+
+defineMacro :: String -> GHCi ()
+defineMacro s = do
+ let (macro_name, definition) = break isSpace s
+ cmds <- io (readIORef commands)
+ if (null macro_name)
+ then throwDyn (OtherError "invalid macro name")
+ else do
+ if (macro_name `elem` map fst cmds)
+ then throwDyn (OtherError
+ ("command `" ++ macro_name ++ "' already defined"))
+ else do
+
+ -- give the expression a type signature, so we can be sure we're getting
+ -- something of the right type.
+ 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
+ Nothing -> return ()
+ Just (hv, unqual, ty)
+ -> io (writeIORef commands
+ ((macro_name, keepGoing (runMacro hv)) : cmds))
+
+runMacro :: HValue{-String -> IO String-} -> String -> GHCi ()
+runMacro fun s = do
+ str <- io ((unsafeCoerce# fun :: String -> IO String) s)
+ stringLoop (lines str)
+
+undefineMacro :: String -> GHCi ()
+undefineMacro macro_name = do
+ cmds <- io (readIORef commands)
+ if (macro_name `elem` map fst builtin_commands)
+ then throwDyn (OtherError
+ ("command `" ++ macro_name ++ "' cannot be undefined"))
+ else do
+ if (macro_name `notElem` map fst cmds)
+ then throwDyn (OtherError
+ ("command `" ++ macro_name ++ "' not defined"))
+ else do
+ io (writeIORef commands (filter ((/= macro_name) . fst) cmds))
loadModule :: String -> GHCi ()
-loadModule path = do
+loadModule path = timeIt (loadModule' path)
+
+loadModule' path = do
state <- getGHCiState
- (new_cmstate, mod) <- io (cmLoadModule (cmstate state) ({-ToDo!!-}mkModuleName path))
- setGHCiState state{cmstate=new_cmstate, target=Just path}
+ 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)))
reloadModule :: String -> GHCi ()
reloadModule "" = do
state <- getGHCiState
case target state of
- Nothing -> io (putStr "no current target\n")
- Just path -> do (new_cmstate, mod) <- io (cmLoadModule (cmstate state) (mkModuleName path))
- setGHCiState state{cmstate=new_cmstate}
-reloadModule _ = noArgs ":reload"
+ 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
+ }
-setOptions :: String -> GHCi ()
-setOptions = panic "setOptions"
+reloadModule _ = noArgs ":reload"
typeOfExpr :: String -> GHCi ()
-typeOfExpr = panic "typeOfExpr"
+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))
+
+quit :: String -> GHCi Bool
+quit _ = return True
+
+shellEscape :: String -> GHCi Bool
+shellEscape str = io (system str >> return False)
+
+----------------------------------------------------------------------------
+-- Code for `:set'
+
+-- set options in the interpreter. Syntax is exactly the same as the
+-- ghc command line, except that certain options aren't available (-C,
+-- -E etc.)
+--
+-- This is pretty fragile: most options won't work as expected. ToDo:
+-- figure out which ones & disallow them.
-quit :: String -> GHCi ()
-quit _ = return ()
+setOptions :: String -> GHCi ()
+setOptions ""
+ = do st <- getGHCiState
+ let opts = options st
+ io $ putStrLn (showSDoc (
+ text "options currently set: " <>
+ if null opts
+ 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 []
+
+ -- 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
+
+ if (not (null leftovers))
+ then throwDyn (OtherError ("unrecognised flags: " ++
+ unwords leftovers))
+ else return ()
+ )
+
+unsetOptions :: String -> GHCi ()
+unsetOptions 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 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")
+ else return ()
+
+isMinus ('-':s) = True
+isMinus _ = False
+
+isPlus ('+':s) = True
+isPlus _ = False
+
+setOpt ('+':str)
+ = case strToGHCiOpt str of
+ Nothing -> io (putStrLn ("unknown option: `" ++ str ++ "'"))
+ Just o -> setOption o
+
+unsetOpt ('+':str)
+ = case strToGHCiOpt str of
+ Nothing -> io (putStrLn ("unknown option: `" ++ str ++ "'"))
+ Just o -> unsetOption o
+
+strToGHCiOpt :: String -> (Maybe GHCiOption)
+strToGHCiOpt "s" = Just ShowTiming
+strToGHCiOpt "t" = Just ShowType
+strToGHCiOpt "r" = Just RevertCAFs
+strToGHCiOpt _ = Nothing
+
+optToStr :: GHCiOption -> String
+optToStr ShowTiming = "s"
+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
-shellEscape :: String -> GHCi ()
-shellEscape str = io (system str >> return ())
-----------------------------------------------------------------------------
-- GHCi monad
data GHCiState = GHCiState
{
- current_module :: ModuleName,
+ modules :: [Module],
+ current_module :: Module,
target :: Maybe FilePath,
- cmstate :: CmState
+ cmstate :: CmState,
+ options :: [GHCiOption],
+ last_expr :: Maybe String
}
+data GHCiOption
+ = ShowTiming -- show time/allocs after evaluation
+ | ShowType -- show the type of expressions
+ | 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 :: GHCiState -> IO (GHCiState, a) }
instance Monad GHCi where
getGHCiState = GHCi $ \s -> return (s,s)
setGHCiState s = GHCi $ \_ -> return (s,())
+isOptionSet :: GHCiOption -> GHCi Bool
+isOptionSet opt
+ = do st <- getGHCiState
+ return (opt `elem` options st)
+
+setOption :: GHCiOption -> GHCi ()
+setOption opt
+ = do st <- getGHCiState
+ setGHCiState (st{ options = opt : filter (/= opt) (options st) })
+
+unsetOption :: GHCiOption -> GHCi ()
+unsetOption 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)
-myCatch (GHCi m) h = GHCi $ \s -> Exception.catch (m s) (\e -> unGHCi (h e) s)
+-----------------------------------------------------------------------------
+-- recursive exception handlers
+
+-- Don't forget to unblock async exceptions in the handler, or if we're
+-- in an exception loop (eg. let a = error a in a) the ^C exception
+-- may never be delivered. Thanks to Marcin for pointing out the bug.
+
+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)
+
+ghciUnblock :: GHCi a -> GHCi a
+ghciUnblock (GHCi a) = GHCi $ \s -> Exception.unblock (a s)
-----------------------------------------------------------------------------
-- package loader
-linkPackages :: [Package] -> IO ()
-linkPackages pkgs = mapM_ linkPackage pkgs
+-- Left: full path name of a .o file, including trailing .o
+-- Right: "unadorned" name of a .DLL/.so
+-- e.g. On unix "qt" denotes "libqt.so"
+-- On WinDoze "burble" denotes "burble.DLL"
+-- addDLL is platform-specific and adds the lib/.so/.DLL
+-- prefixes plaform-dependently; we don't do that here.
+type LibrarySpec
+ = Either FilePath String
+
+showLS (Left nm) = "(static) " ++ nm
+showLS (Right nm) = "(dynamic) " ++ nm
+
+linkPackages :: [LibrarySpec] -> [Package] -> IO ()
+linkPackages cmdline_lib_specs pkgs
+ = do mapM_ linkPackage pkgs
+ mapM_ preloadLib cmdline_lib_specs
+ where
+ preloadLib lib_spec
+ = do putStr ("Loading object " ++ showLS lib_spec ++ " ... ")
+ case lib_spec of
+ Left static_ish
+ -> do b <- doesFileExist static_ish
+ if not b
+ then do putStr "not found.\n"
+ croak
+ else do loadObj static_ish
+ putStr "done.\n"
+ Right dll_unadorned
+ -> do maybe_errmsg <- addDLL dll_unadorned
+ if maybe_errmsg == nullPtr
+ then putStr "done.\n"
+ else do str <- peekCString maybe_errmsg
+ putStr ("failed (" ++ str ++ ")\n")
+ croak
+
+ croak = throwDyn (OtherError "user specified .o/.so/.DLL could not be loaded.")
+
linkPackage :: Package -> IO ()
-- ignore rts and gmp for now (ToDo; better?)
-linkPackage pkg | name pkg `elem` ["rts", "gmp"] = return ()
-linkPackage pkg = do
- putStr ("Loading package " ++ name pkg ++ " ... ")
- let dirs = library_dirs pkg
- let objs = map (++".o") (hs_libraries pkg ++ extra_libraries pkg)
- mapM (linkOneObj dirs) objs
- putStr "resolving ... "
- resolveObjs
- putStrLn "done."
-
-linkOneObj dirs obj = do
- filename <- findFile dirs obj
- loadObj filename
-
-findFile [] obj = throwDyn (OtherError ("can't find " ++ obj))
-findFile (d:ds) obj = do
- let path = d ++ '/':obj
- b <- doesFileExist path
- if b then return path else findFile ds obj
+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 :: LibrarySpec -> IO ()
+loadClassified (Left obj_absolute_filename)
+ = do loadObj obj_absolute_filename
+loadClassified (Right dll_unadorned)
+ = do maybe_errmsg <- addDLL dll_unadorned
+ if maybe_errmsg == nullPtr
+ then return ()
+ else do str <- peekCString maybe_errmsg
+ throwDyn (OtherError ("can't find .o or .so/.DLL for: "
+ ++ dll_unadorned ++ " (" ++ str ++ ")" ))
+
+locateOneObj :: [FilePath] -> String -> IO LibrarySpec
+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
+-----------------------------------------------------------------------------
+-- timing & statistics
+
+timeIt :: GHCi a -> GHCi a
+timeIt action
+ = do b <- isOptionSet ShowTiming
+ if not b
+ then action
+ else do allocs1 <- io $ getAllocations
+ time1 <- io $ getCPUTime
+ a <- action
+ allocs2 <- io $ getAllocations
+ time2 <- io $ getCPUTime
+ io $ printTimes (allocs2 - allocs1) (time2 - time1)
+ return a
+
+foreign import "getAllocations" getAllocations :: IO Int
+
+printTimes :: Int -> Integer -> IO ()
+printTimes allocs psecs
+ = do let secs = (fromIntegral psecs / (10^12)) :: Float
+ secs_str = showFFloat (Just 2) secs
+ putStrLn (showSDoc (
+ parens (text (secs_str "") <+> text "secs" <> comma <+>
+ int allocs <+> text "bytes")))
+-----------------------------------------------------------------------------
+-- reverting CAFs
+
+foreign import revertCAFs :: IO () -- make it "safe", just in case
projects / ghc-hetmet.git / blobdiff