+{-# OPTIONS -#include "Linker.h" -#include "SchedAPI.h" #-}
-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.90 2001/08/16 10:54:22 simonmar Exp $
+-- $Id: InteractiveUI.hs,v 1.139 2002/12/12 13:21:46 ross Exp $
--
-- GHC Interactive User Interface
--
-- (c) The GHC Team 2000
--
-----------------------------------------------------------------------------
-
-{-# OPTIONS -#include "Linker.h" #-}
-{-# OPTIONS -#include "SchedAPI.h" #-}
-module InteractiveUI ( interactiveUI, ghciWelcomeMsg ) where
+module InteractiveUI (
+ interactiveUI, -- :: CmState -> [FilePath] -> [LibrarySpec] -> IO ()
+ ghciWelcomeMsg
+ ) where
#include "../includes/config.h"
#include "HsVersions.h"
-import Packages
import CompManager
-import HscTypes ( GhciMode(..), TyThing(..) )
-import MkIface ( ifaceTyCls )
-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 Linker
-import Finder ( flushPackageCache )
+import DriverUtil ( remove_spaces, handle )
+import Linker ( initLinker, showLinkerState, linkLibraries )
+import Finder ( flushFinderCache )
import Util
import Id ( isRecordSelector, recordSelectorFieldLabel,
- isDataConWrapId, idName )
+ isDataConWrapId, isDataConId, idName )
import Class ( className )
-import TyCon ( tyConName, tyConClass_maybe )
+import TyCon ( tyConName, tyConClass_maybe, isPrimTyCon, DataConDetails(..) )
import FieldLabel ( fieldLabelTyCon )
import SrcLoc ( isGoodSrcLoc )
-import Name ( Name, isHomePackageName, nameSrcLoc, NamedThing(..) )
-import BasicTypes ( defaultFixity )
+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(..), getDynFlags, saveDynFlags, restoreDynFlags, dopt_unset )
-import Panic ( GhcException(..) )
+import CmdLineOpts ( DynFlag(..), DynFlags(..), getDynFlags, saveDynFlags,
+ restoreDynFlags, dopt_unset )
+import Panic ( GhcException(..), showGhcException )
import Config
#ifndef mingw32_TARGET_OS
-import Posix
+import System.Posix
#endif
-import Exception
-import Dynamic
#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
-import Readline
+import Control.Concurrent ( yield ) -- Used in readline loop
+import System.Console.Readline as Readline
#endif
-import IOExts
+
+--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 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 Foreign ( nullPtr )
-import CString ( peekCString )
+import Foreign.C.String ( CString, peekCString, withCString )
+import Data.IORef ( IORef, newIORef, readIORef, writeIORef )
+
+import GHC.Posix ( setNonBlockingFD )
-----------------------------------------------------------------------------
builtin_commands :: [(String, String -> GHCi Bool)]
builtin_commands = [
("add", keepGoing addModule),
+ ("browse", keepGoing browseCmd),
("cd", keepGoing changeDirectory),
("def", keepGoing defineMacro),
("help", keepGoing help),
("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\
-\\
-\ <stmt> evaluate/run <stmt>\n\
-\ :add <filename> ... add module(s) to the current target set\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 to <mod>\n\
-\ :reload reload the current module set\n\
-\ :set <option> ... set options\n\
-\ :undef <cmd> undefine user-defined command :<cmd>\n\
-\ :type <expr> show the type of <expr>\n\
-\ :unset <option> ... unset options\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\
\ (eg. -v2, -fglasgow-exts, etc.)\n\
\"
-interactiveUI :: CmState -> [FilePath] -> [LibrarySpec] -> IO ()
-interactiveUI cmstate paths cmdline_libs = do
+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
+
+ -- packages are loaded "on-demand" now
initLinker
- linkPackages cmdline_libs pkgs
+ linkLibraries dflags cmdline_objs
+
+ -- Initialise buffering for the *interpreted* I/O system
+ cmstate <- initInterpBuffering cmstate dflags
+
+ -- We don't want the cmd line to buffer any input that might be
+ -- intended for the program, so unbuffer stdin.
+ hSetBuffering stdin NoBuffering
- (cmstate, ok, mods) <-
- case paths of
- [] -> return (cmstate, True, [])
- _ -> cmLoadModule cmstate paths
+ -- initial context is just the Prelude
+ cmstate <- cmSetContext cmstate dflags [] ["Prelude"]
#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
Readline.initialize
#endif
- dflags <- getDynFlags
-
- (cmstate, maybe_hval)
- <- cmCompileExpr cmstate dflags "IO.hFlush PrelHandle.stderr"
- case maybe_hval of
- Just hval -> writeIORef flush_stderr (unsafeCoerce# hval :: IO ())
- _ -> panic "interactiveUI:stderr"
-
- (cmstate, maybe_hval)
- <- cmCompileExpr cmstate dflags "IO.hFlush PrelHandle.stdout"
- case maybe_hval of
- Just hval -> writeIORef flush_stdout (unsafeCoerce# hval :: IO ())
- _ -> panic "interactiveUI:stdout"
-
- startGHCi runGHCi GHCiState{ targets = paths,
- cmstate = cmstate,
- options = [] }
+ startGHCi (runGHCi paths dflags)
+ GHCiState{ progname = "<interactive>",
+ args = [],
+ targets = paths,
+ cmstate = cmstate,
+ options = [] }
#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
Readline.resetTerminal Nothing
return ()
-
-runGHCi :: GHCi ()
-runGHCi = do
+runGHCi :: [FilePath] -> DynFlags -> GHCi ()
+runGHCi paths dflags = do
read_dot_files <- io (readIORef v_Read_DotGHCi)
when (read_dot_files) $ do
Left e -> return ()
Right hdl -> fileLoop hdl False
- -- read commands from stdin
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
- readlineLoop
+ -- 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
- fileLoop stdin True
+ is_tty <- io (hIsTerminalDevice stdin)
+ interactiveLoop is_tty
#endif
-- and finally, exit
- io $ do putStrLn "Leaving GHCi."
+ 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
+#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 is_tty
+#endif
-- NOTE: We only read .ghci files if they are owned by the current user,
checkPerms :: String -> IO Bool
checkPerms name =
- handle (\_ -> return False) $ do
#ifdef mingw32_TARGET_OS
- doesFileExist name
+ return True
#else
+ DriverUtil.handle (\_ -> return False) $ do
st <- getFileStatus name
me <- getRealUserID
if fileOwner st /= me then do
fileLoop :: Handle -> Bool -> GHCi ()
fileLoop hdl prompt = do
- st <- getGHCiState
- mod <- io (cmGetContext (cmstate st))
- when prompt (io (putStr (mod ++ "> ")))
+ 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
+mkPrompt toplevs exports
+ = concat (intersperse " " (map ('*':) toplevs ++ exports)) ++ "> "
+
#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
readlineLoop :: GHCi ()
readlineLoop = do
- st <- getGHCiState
- mod <- io (cmGetContext (cmstate st))
- l <- io (readline (mod ++ "> "))
+ 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 -> do
- flushEverything
- showException 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 (PhaseFailed phase code) ->
- io (putStrLn ("Phase " ++ phase ++ " failed (code "
- ++ show code ++ ")"))
- Just Interrupted ->
- io (putStrLn "Interrupted.")
- Just (CmdLineError s) ->
- io (putStrLn s) -- omit the location for CmdLineError
- Just other_ghc_ex ->
- io (putStrLn (show other_ghc_ex))
+ 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 stmt
- = do timeIt (do stuff <- runStmt stmt; finishEvalExpr stuff)
+ = do timeIt (do nms <- runStmt stmt; finishEvalExpr nms)
return False
--- Returns True if the expr was successfully parsed, renamed and
--- typechecked.
-runStmt :: String -> GHCi (Maybe [Name])
+runStmt :: String -> GHCi [Name]
runStmt stmt
- | null (filter (not.isSpace) stmt)
- = return Nothing
+ | null (filter (not.isSpace) stmt) = return []
| otherwise
= do st <- getGHCiState
dflags <- io getDynFlags
let dflags' = dopt_unset dflags Opt_WarnUnusedBinds
- (new_cmstate, names) <- io (cmRunStmt (cmstate st) dflags' stmt)
+ (new_cmstate, result) <-
+ io $ withProgName (progname st) $ withArgs (args st) $
+ cmRunStmt (cmstate st) dflags' stmt
setGHCiState st{cmstate = new_cmstate}
- return (Just names)
+ 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 names)
+finishEvalExpr names
= do b <- isOptionSet ShowType
- st <- getGHCiState
- when b (mapM_ (showTypeOfName (cmstate st)) names)
+ cmstate <- getCmState
+ when b (mapM_ (showTypeOfName cmstate) names)
+ flushInterpBuffers
b <- isOptionSet RevertCAFs
io (when b revertCAFs)
- flushEverything
return True
showTypeOfName :: CmState -> Name -> GHCi ()
Nothing -> return ()
Just str -> io (putStrLn (showSDoc (ppr n) ++ " :: " ++ str))
-flushEverything :: GHCi ()
-flushEverything
- = io $ do flush_so <- readIORef flush_stdout
- flush_so
- flush_se <- readIORef flush_stdout
- flush_se
- return ()
-
specialCommand :: String -> GHCi Bool
specialCommand ('!':str) = shellEscape (dropWhile isSpace str)
specialCommand str = do
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
info "" = throwDyn (CmdLineError "syntax: `:i <thing-you-want-info-about>'")
info s = do
let names = words s
- state <- getGHCiState
+ init_cms <- getCmState
dflags <- io getDynFlags
let
infoThings cms [] = return cms
infoThings cms (name:names) = do
- (cms, unqual, stuff) <- io (cmInfoThing cms dflags name)
+ (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 (ifaceTyCls ty_thing) ]
+ ppr (ifaceTyThing ty_thing) ]
showFixity fix name
| fix == defaultFixity = empty
- | otherwise = ppr fix <+> ppr name
+ | otherwise = ppr fix <+>
+ (if isSymOcc (nameOccName name)
+ then ppr name
+ else char '`' <> ppr name <> char '`')
- showTyThing (AClass cl)
+ 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)]
= empty
where loc = nameSrcLoc name
- cms <- infoThings (cmstate state) names
- setGHCiState state{ cmstate = cms }
+ cms <- infoThings init_cms names
+ setCmState cms
return ()
-
addModule :: String -> GHCi ()
addModule str = do
let files = words str
dflags <- io (getDynFlags)
io (revertCAFs) -- always revert CAFs on load/add.
let new_targets = files ++ targets state
- (cmstate1, ok, mods) <- io (cmLoadModule (cmstate state) new_targets)
+ graph <- io (cmDepAnal (cmstate state) dflags new_targets)
+ (cmstate1, ok, mods) <- io (cmLoadModules (cmstate state) dflags graph)
setGHCiState state{ cmstate = cmstate1, targets = new_targets }
- modulesLoadedMsg ok mods
-
-setContext :: String -> GHCi ()
-setContext ""
- = throwDyn (CmdLineError "syntax: `:m <module>'")
-setContext m | not (isUpper (head m)) || not (all isAlphaNumEx (tail m))
- = throwDyn (CmdLineError ("strange looking module name: `" ++ m ++ "'"))
- where
- isAlphaNumEx c = isAlphaNum c || c == '_'
-setContext str
- = do st <- getGHCiState
- new_cmstate <- io (cmSetContext (cmstate st) str)
- setGHCiState st{cmstate=new_cmstate}
+ setContextAfterLoad mods
+ modulesLoadedMsg ok mods dflags
changeDirectory :: String -> GHCi ()
changeDirectory ('~':d) = do
let new_expr = '(' : definition ++ ") :: String -> IO String"
-- compile the expression
- st <- getGHCiState
+ cms <- getCmState
dflags <- io getDynFlags
- (new_cmstate, maybe_hv) <- io (cmCompileExpr (cmstate st) dflags new_expr)
- setGHCiState st{cmstate = new_cmstate}
+ (new_cmstate, maybe_hv) <- io (cmCompileExpr cms dflags new_expr)
+ setCmState new_cmstate
case maybe_hv of
Nothing -> return ()
Just hv -> io (writeIORef commands --
else do
io (writeIORef commands (filter ((/= macro_name) . fst) cmds))
+
loadModule :: String -> GHCi ()
loadModule str = timeIt (loadModule' str)
let files = words str
state <- getGHCiState
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 (cmLoadModule cmstate1 files)
+
+ io (revertCAFs) -- always revert CAFs on load.
+ (cmstate2, ok, mods) <- io (cmLoadModules cmstate1 dflags graph)
setGHCiState state{ cmstate = cmstate2, targets = files }
- modulesLoadedMsg ok mods
+
+ setContextAfterLoad mods
+ modulesLoadedMsg ok mods dflags
+
reloadModule :: String -> GHCi ()
reloadModule "" = do
state <- getGHCiState
+ dflags <- io getDynFlags
case targets state of
[] -> io (putStr "no current target\n")
- paths
- -> do io (revertCAFs) -- always revert CAFs on reload.
- (new_cmstate, ok, mods) <- io (cmLoadModule (cmstate state) paths)
- setGHCiState state{ cmstate=new_cmstate }
- modulesLoadedMsg ok mods
+ 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 = do
- let mod_commas
+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
- False ->
+ case ok of
+ Failed ->
io (putStrLn (showSDoc (text "Failed, modules loaded: " <> mod_commas)))
- True ->
+ Succeeded ->
io (putStrLn (showSDoc (text "Ok, modules loaded: " <> mod_commas)))
typeOfExpr :: String -> GHCi ()
typeOfExpr str
- = do st <- getGHCiState
+ = do cms <- getCmState
dflags <- io getDynFlags
- (new_cmstate, maybe_tystr) <- io (cmTypeOfExpr (cmstate st) dflags str)
- setGHCiState st{cmstate = new_cmstate}
+ (new_cmstate, maybe_tystr) <- io (cmTypeOfExpr cms dflags str)
+ setCmState new_cmstate
case maybe_tystr of
Nothing -> return ()
Just tystr -> io (putStrLn tystr)
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 (plus_opts, minus_opts) = partition isPlus (words str)
- mapM setOpt plus_opts
+setCmd str
+ = case words str of
+ ("args":args) -> setArgs args
+ ("prog":prog) -> setProg prog
+ wds -> setOptions wds
+
+setArgs args = do
+ st <- getGHCiState
+ setGHCiState st{ args = args }
+
+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_Packages)
pkgs_after <- io (readIORef v_Packages)
-- update things if the users wants more packages
- when (pkgs_before /= pkgs_after) $
- newPackages (pkgs_after \\ pkgs_before)
+ 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 []
+ leftovers <- processArgs dynamic_flags (leftovers ++ pkg_extra_dyn) []
saveDynFlags
if (not (null leftovers))
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))
optToStr ShowType = "t"
optToStr RevertCAFs = "r"
-newPackages new_pkgs = do
- state <- getGHCiState
- dflags <- io getDynFlags
+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 = [] }
+ 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 ()
- io $ do
- pkgs <- getPackageInfo
- flushPackageCache pkgs
-
- new_pkg_info <- getPackageDetails new_pkgs
- mapM_ (linkPackage False) (reverse new_pkg_info)
-----------------------------------------------------------------------------
-- GHCi monad
data GHCiState = GHCiState
{
+ progname :: String,
+ args :: [String],
targets :: [FilePath],
cmstate :: CmState,
options :: [GHCiOption]
| RevertCAFs -- revert CAFs after every evaluation
deriving Eq
-GLOBAL_VAR(flush_stdout, error "no flush_stdout", IO ())
-GLOBAL_VAR(flush_stderr, error "no flush_stdout", IO ())
-
newtype GHCi a = GHCi { unGHCi :: IORef GHCiState -> IO a }
startGHCi :: GHCi a -> GHCiState -> IO 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
+-- for convenience...
+getCmState = getGHCiState >>= return . cmstate
+setCmState cms = do s <- getGHCiState; setGHCiState s{cmstate=cms}
+
isOptionSet :: GHCiOption -> GHCi Bool
isOptionSet opt
= do st <- getGHCiState
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
-
--- 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
--- suffixes platform-dependently; we don't do that here.
---
--- For dynamic objects only, try to find the object file in all the
--- directories specified in v_Library_Paths before giving up.
-
-type LibrarySpec
- = Either FilePath String
-
-showLS (Left nm) = "(static) " ++ nm
-showLS (Right nm) = "(dynamic) " ++ nm
-
-linkPackages :: [LibrarySpec] -> [PackageConfig] -> IO ()
-linkPackages cmdline_lib_specs pkgs
- = do sequence_ [ linkPackage (name p `elem` loaded) p | p <- reverse pkgs ]
- lib_paths <- readIORef v_Library_paths
- mapM_ (preloadLib lib_paths) cmdline_lib_specs
- if (null cmdline_lib_specs)
- then return ()
- else do putStr "final link ... "
- ok <- resolveObjs
- if ok then putStrLn "done."
- else throwDyn (InstallationError "linking extra libraries/objects failed")
- where
- -- Packages that are already linked into GHCi. For mingw32, we only
- -- skip gmp and rts, since std and after need to load the msvcrt.dll
- -- library which std depends on.
- loaded
-# ifndef mingw32_TARGET_OS
- = [ "gmp", "rts", "std", "concurrent", "posix", "text", "util" ]
-# else
- = [ "gmp", "rts" ]
-# endif
-
- preloadLib :: [String] -> LibrarySpec -> IO ()
- preloadLib lib_paths lib_spec
- = do putStr ("Loading object " ++ showLS lib_spec ++ " ... ")
- case lib_spec of
- Left static_ish
- -> do b <- preload_static lib_paths static_ish
- putStrLn (if b then "done." else "not found")
- Right dll_unadorned
- -> -- We add "" to the set of paths to try, so that
- -- if none of the real paths match, we force addDLL
- -- to look in the default dynamic-link search paths.
- do b <- preload_dynamic (lib_paths++[""]) dll_unadorned
- when (not b) (cantFind lib_paths lib_spec)
- putStrLn "done"
-
- cantFind :: [String] -> LibrarySpec -> IO ()
- cantFind paths spec
- = do putStr ("failed.\nCan't find " ++ showLS spec
- ++ " in directories:\n"
- ++ unlines (map (" "++) paths) )
- give_up
-
- -- not interested in the paths in the static case.
- preload_static paths name
- = do b <- doesFileExist name
- if not b then return False
- else loadObj name >> return True
-
- preload_dynamic [] name
- = return False
- preload_dynamic (path:paths) rootname
- = do maybe_errmsg <- addDLL path rootname
- if maybe_errmsg /= nullPtr
- then preload_dynamic paths rootname
- else return True
-
- give_up
- = (throwDyn . CmdLineError)
- "user specified .o/.so/.DLL could not be loaded."
-
-
-linkPackage :: Bool -> PackageConfig -> IO ()
--- ignore rts and gmp for now (ToDo; better?)
-linkPackage loaded_in_ghci 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
-
- -- Don't load the .so libs if this is a package GHCi is already
- -- linked against, because we'll already have the .so linked in.
- let (so_libs, obj_libs) = partition isRight classifieds
- let sos_first | loaded_in_ghci = obj_libs
- | otherwise = so_libs ++ obj_libs
-
- mapM loadClassified sos_first
- putStr "linking ... "
- ok <- resolveObjs
- if ok then putStrLn "done."
- else panic ("can't load package `" ++ name pkg ++ "'")
- 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 -- doesn't seem right to me
- if maybe_errmsg == nullPtr
- then return ()
- else do str <- peekCString maybe_errmsg
- throwDyn (CmdLineError ("can't load .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
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
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