X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fghci%2FDebugger.hs;h=4389213849c986273b4ca8f9363e616fcf880318;hb=38e7ac3ffa32d75c1922e7247a910e06d9957116;hp=125d634d70d6eafa86f694626dfebd92ad83de53;hpb=01314483b22813020e4746cc32d97a0f9fb6e806;p=ghc-hetmet.git diff --git a/compiler/ghci/Debugger.hs b/compiler/ghci/Debugger.hs index 125d634..4389213 100644 --- a/compiler/ghci/Debugger.hs +++ b/compiler/ghci/Debugger.hs @@ -4,12 +4,16 @@ -- -- Pepe Iborra (supported by Google SoC) 2006 -- +-- ToDo: lots of violation of layering here. This module should +-- decide whether it is above the GHC API (import GHC and nothing +-- else) or below it. +-- ----------------------------------------------------------------------------- -module Debugger where +module Debugger (pprintClosureCommand) where +import qualified DebuggerTys import Linker -import Breakpoints import RtClosureInspect import PrelNames @@ -22,30 +26,21 @@ import VarEnv import Name import NameEnv import RdrName -import Module -import Finder import UniqSupply import Type import TyCon -import DataCon import TcGadt import GHC import GhciMonad -import PackageConfig import Outputable -import ErrUtils +import Pretty ( Mode(..), showDocWith ) import FastString import SrcLoc -import Util -import Maybes import Control.Exception import Control.Monad -import qualified Data.Map as Map -import Data.Array.Unboxed import Data.List -import Data.Typeable ( Typeable ) import Data.Maybe import Data.IORef @@ -64,8 +59,8 @@ pprintClosureCommand bindThings force str = do uniques <- liftM uniqsFromSupply (mkSplitUniqSupply 'q') return$ map (\u-> (mkSysTvName u (mkFastString "a"))) uniques mb_ids <- io$ mapM (cleanUp cms newvarsNames) (words str) - new_ids <- mapM (io . go cms) (catMaybes mb_ids) - io$ updateIds cms new_ids + mb_new_ids <- mapM (io . go cms) (catMaybes mb_ids) + io$ updateIds cms (catMaybes mb_new_ids) where -- Find the Id, clean up 'Unknowns' cleanUp :: Session -> [Name] -> String -> IO (Maybe Id) @@ -76,20 +71,23 @@ pprintClosureCommand bindThings force str = do -- Do the obtainTerm--bindSuspensions-refineIdType dance -- Warning! This function got a good deal of side-effects - go :: Session -> Id -> IO Id + go :: Session -> Id -> IO (Maybe Id) go cms id = do - Just term <- obtainTerm cms force id - term' <- if not bindThings then return term - else bindSuspensions cms term - showterm <- pprTerm cms term' - unqual <- GHC.getPrintUnqual cms - (putStrLn . showSDocForUser unqual) (ppr id <+> char '=' <+> showterm) + mb_term <- obtainTerm cms force id + maybe (return Nothing) `flip` mb_term $ \term -> do + term' <- if not bindThings then return term + else bindSuspensions cms term + showterm <- pprTerm cms term' + unqual <- GHC.getPrintUnqual cms + let showSDocForUserOneLine unqual doc = + showDocWith LeftMode (doc (mkErrStyle unqual)) + (putStrLn . showSDocForUserOneLine unqual) (ppr id <+> char '=' <+> showterm) -- Before leaving, we compare the type obtained to see if it's more specific -- Note how we need the Unknown-clear type returned by obtainTerm - let Just reconstructedType = termType term - new_type <- instantiateTyVarsToUnknown cms - (mostSpecificType (idType id) reconstructedType) - return (setIdType id new_type) + let Just reconstructedType = termType term + new_type <- instantiateTyVarsToUnknown cms + (mostSpecificType (idType id) reconstructedType) + return . Just $ setIdType id new_type updateIds :: Session -> [Id] -> IO () updateIds (Session ref) new_ids = do @@ -209,59 +207,9 @@ newGrimName cms userName = do name = mkInternalName unique occname noSrcLoc return name ----------------------------------------------------------------------------- --- | Replace all the tyvars in a Term with the opaque type GHC.Base.Unknown ----------------------------------------------------------------------------- -instantiateTyVarsToUnknown :: Session -> Type -> IO Type -instantiateTyVarsToUnknown cms ty --- We have a GADT, so just fix its tyvars - | Just (tycon, args) <- splitTyConApp_maybe ty - , tycon /= funTyCon - , isGADT tycon - = mapM fixTyVars args >>= return . mkTyConApp tycon --- We have a regular TyCon, so map recursively to its args - | Just (tycon, args) <- splitTyConApp_maybe ty - , tycon /= funTyCon - = do unknownTyVar <- unknownTV - args' <- mapM (instantiateTyVarsToUnknown cms) args - return$ mkTyConApp tycon args' --- we have a tyvar of kind * - | Just tyvar <- getTyVar_maybe ty - , ([],_) <- splitKindFunTys (tyVarKind tyvar) - = unknownTV --- we have a higher kind tyvar, so insert an unknown of the appropriate kind - | Just tyvar <- getTyVar_maybe ty - , (args,_) <- splitKindFunTys (tyVarKind tyvar) - = liftM mkTyConTy $ unknownTC !! length args --- Base case - | otherwise = return ty - - where unknownTV = do - Just (ATyCon unknown_tc) <- lookupName cms unknownTyConName - return$ mkTyConTy unknown_tc - unknownTC = [undefined, unknownTC1, unknownTC2, unknownTC3] - unknownTC1 = do - Just (ATyCon unknown_tc) <- lookupName cms unknown1TyConName - return unknown_tc - unknownTC2 = do - Just (ATyCon unknown_tc) <- lookupName cms unknown2TyConName - return unknown_tc - unknownTC3 = do - Just (ATyCon unknown_tc) <- lookupName cms unknown3TyConName - return unknown_tc --- isGADT ty | pprTrace' "isGADT" (ppr ty <> colon <> ppr(isGadtSyntaxTyCon ty)) False = undefined - isGADT tc | Just dcs <- tyConDataCons_maybe tc = any (not . null . dataConEqSpec) dcs - | otherwise = False - fixTyVars ty - | Just (tycon, args) <- splitTyConApp_maybe ty - = mapM fixTyVars args >>= return . mkTyConApp tycon --- Fix the tyvar so that the interactive environment doesn't choke on it TODO - | Just tv <- getTyVar_maybe ty = return ty --TODO - | otherwise = return ty - -- | The inverse function. Strip the GHC.Base.Unknowns in the type of the id, they correspond to tyvars. The caller must provide an infinite list of fresh names stripUnknowns :: [Name] -> Id -> Id -stripUnknowns names id = setIdType id . sigmaType . fst . go names . idType +stripUnknowns names id = setIdType id . fst . go names . idType $ id where go tyvarsNames@(v:vv) ty @@ -295,282 +243,8 @@ stripUnknowns names id = setIdType id . sigmaType . fst . go names . idType kind1 = mkArrowKind liftedTypeKind liftedTypeKind kind2 = mkArrowKind kind1 liftedTypeKind kind3 = mkArrowKind kind2 liftedTypeKind -stripUnknowns _ id = id - ------------------------------ --- | The :breakpoint command ------------------------------ -bkptOptions :: String -> GHCi Bool -bkptOptions "continue" = -- We want to quit if in an inferior session - liftM not isTopLevel -bkptOptions "stop" = do - inside_break <- liftM not isTopLevel - when inside_break $ throwDyn StopChildSession - return False - -bkptOptions cmd = do - dflags <- getDynFlags - bt <- getBkptTable - sess <- getSession - bkptOptions' sess (words cmd) bt - return False - where - bkptOptions' _ ["list"] bt = do - let msgs = [ ppr mod <+> colon <+> ppr coords - | (mod,site) <- btList bt - , let coords = getSiteCoords bt mod site] - num_msgs = [parens (int n) <+> msg | (n,msg) <- zip [1..] msgs] - msg <- showForUser$ if null num_msgs - then text "There are no enabled breakpoints" - else vcat num_msgs - io$ putStrLn msg - - bkptOptions' s ("add":cmds) bt - | [mod_name,line]<- cmds - , [(lineNum,[])] <- reads line - = handleAdd mod_name $ (\mod->addBkptByLine mod lineNum) - - | [mod_name,line,col] <- cmds - = handleAdd mod_name $ (\mod->addBkptByCoord mod (read line, read col)) - - | otherwise = throwDyn $ CmdLineError $ - "syntax: :breakpoint add Module line [col]" - where - handleAdd mod_name f = do - mod <- io$ GHC.findModule s (GHC.mkModuleName mod_name) Nothing - either - (handleBkptEx s mod) - (\(newTable, site) -> do - setBkptTable newTable - io (putStrLn ("Breakpoint set at " ++ - show (getSiteCoords newTable mod site)))) - (f mod bt) - - bkptOptions' s ("del":cmds) bt - | [i'] <- cmds - , [(i,[])] <- reads i' - , bkpts <- btList bt - = if i > length bkpts - then throwDyn $ CmdLineError - "Not a valid breakpoint #. Use :breakpoint list to see the current breakpoints." - else - let (mod, site) = bkpts !! (i-1) - in handleDel mod $ delBkptBySite mod site - - | [fn,line] <- cmds - , [(lineNum,[])] <- reads line - , mod <- GHC.mkModule mainPackageId (GHC.mkModuleName fn) - = handleDel mod $ delBkptByLine mod lineNum - - | [fn,line,col] <- cmds - , [(lineNum,[])] <- reads line - , [(colNum,[])] <- reads col - , mod <- GHC.mkModule mainPackageId (GHC.mkModuleName fn) - = handleDel mod $ delBkptByCoord mod (lineNum, colNum) - - | otherwise = throwDyn $ CmdLineError $ - "syntax: :breakpoint del (breakpoint # | Module line [col])" - - where delMsg = "Breakpoint deleted" - handleDel mod f = either (handleBkptEx s mod) - (\newtable-> setBkptTable newtable >> io (putStrLn delMsg)) - (f bt) - - - bkptOptions' _ _ _ = throwDyn $ CmdLineError $ - "syntax: :breakpoint (list|continue|stop|add|del)" - --- Error messages --- handleBkptEx :: Session -> Module -> Debugger.BkptException -> a - handleBkptEx s m NotHandled = io$ - findModSummary m >>= \mod_summary -> - isModuleInterpreted s mod_summary >>= \it -> - if it - then error$ "Module " ++ showSDoc (ppr m) ++ " was not loaded under debugging mode.\n" - ++ "Enable debugging mode with -fdebugging (and reload your module)" - else error$ "Module " ++ showSDoc (ppr m) ++ " was loaded in compiled (.o) mode.\n" - ++ "You must load a module in interpreted mode and with -fdebugging on to debug it." - where findModSummary m = getModuleGraph s >>= \mod_graph -> - case [ modsum | modsum <- mod_graph - , ms_mod modsum == m ] of - [modsum] -> return modsum - handleBkptEx _ _ e = error (show e) - -------------------------- --- Breakpoint Tables -------------------------- - -data BkptTable a = BkptTable { - -- | An array of breaks, indexed by site number - breakpoints :: Map.Map a (UArray Int Bool) - -- | A list of lines, each line can have zero or more sites, which are annotated with a column number - , sites :: Map.Map a [[(SiteNumber, Int)]] - } - deriving Show - -sitesOf :: Ord a => BkptTable a -> a -> Maybe [[(SiteNumber, Int)]] -sitesOf bt fn = Map.lookup fn (sites bt) -bkptsOf bt fn = Map.lookup fn (breakpoints bt) - - -data BkptError = - NotHandled -- Trying to manipulate a element not handled by this BkptTable - | NoBkptFound - | NotNeeded -- Used when a breakpoint was already enabled - deriving Typeable - -instance Show BkptError where - show NoBkptFound = "No suitable breakpoint site found" - show NotNeeded = "Nothing to do" - show NotHandled = "BkptTable: Element not controlled by this table" - -emptyBkptTable :: Ord a => BkptTable a -addModule :: Ord a => a -> [(SiteNumber,Coord)] -> BkptTable a -> BkptTable a --- | Lines start at index 1 -addBkptByLine :: Ord a => a -> Int -> BkptTable a -> Either BkptError (BkptTable a, SiteNumber) -addBkptByCoord :: Ord a => a -> Coord -> BkptTable a -> Either BkptError (BkptTable a, SiteNumber) -delBkptByLine :: Ord a => a -> Int -> BkptTable a -> Either BkptError (BkptTable a) -delBkptBySite :: Ord a => a -> SiteNumber -> BkptTable a -> Either BkptError (BkptTable a) -delBkptByCoord :: Ord a => a -> Coord -> BkptTable a -> Either BkptError (BkptTable a) -isBkptEnabled :: Ord a => BkptTable a -> BkptLocation a -> Bool -btElems :: Ord a => BkptTable a -> [(a, [SiteNumber])] -btList :: Ord a => BkptTable a -> [BkptLocation a] -sitesList :: Ord a => BkptTable a -> [(a, [Coord])] -getSiteCoords :: Ord a => BkptTable a -> a -> SiteNumber -> Coord - -emptyBkptTable = BkptTable Map.empty Map.empty - -addBkptByLine a i bt - | Just lines <- sitesOf bt a - , Just bkptsArr <- bkptsOf bt a - , i < length lines - = case [line | line <- drop i lines, not (null line)] of - ((x:_):_) -> let (siteNum,col) = x - wasAlreadyOn = bkptsArr ! siteNum - newArr = bkptsArr // [(siteNum, True)] - newTable = Map.insert a newArr (breakpoints bt) - in if wasAlreadyOn - then Left NotNeeded - else Right (bt{breakpoints=newTable}, siteNum) - otherwise -> Left NoBkptFound - - | Just sites <- sitesOf bt a - = Left NoBkptFound - | otherwise = Left NotHandled - -addBkptByCoord a (r,c) bt - | Just lines <- sitesOf bt a - , Just bkptsArr <- bkptsOf bt a - , r < length lines - = case [ (sn,col) | (sn,col)<-lines!!r, col>=c] of - [] -> Left NoBkptFound - (x:_) -> let (siteNum, col) = x - wasAlreadyOn = bkptsArr ! siteNum - newArr = bkptsArr // [(siteNum, True)] - newTable = Map.insert a newArr (breakpoints bt) - in if wasAlreadyOn - then Left NotNeeded - else Right (bt{breakpoints=newTable}, siteNum) - - | Just sites <- sitesOf bt a - = Left NoBkptFound - | otherwise = Left NotHandled - -delBkptBySite a i bt - | Just bkptsArr <- bkptsOf bt a - , not (inRange (bounds bkptsArr) i) - = Left NoBkptFound - - | Just bkptsArr <- bkptsOf bt a - , bkptsArr ! i -- Check that there was a enabled bkpt here - , newArr <- bkptsArr // [(i,False)] - , newTable <- Map.insert a newArr (breakpoints bt) - = Right bt {breakpoints=newTable} - - | Just sites <- sitesOf bt a - = Left NotNeeded - - | otherwise = Left NotHandled - -delBkptByLine a l bt - | Just sites <- sitesOf bt a - , (site:_) <- [s | (s,c') <- sites !! l] - = delBkptBySite a site bt - - | Just sites <- sitesOf bt a - = Left NoBkptFound - - | otherwise = Left NotHandled - -delBkptByCoord a (r,c) bt - | Just sites <- sitesOf bt a - , (site:_) <- [s | (s,c') <- sites !! r, c>=c', isBkptEnabled bt (a,s)] - = delBkptBySite a site bt - - | Just sites <- sitesOf bt a - = Left NoBkptFound - - | otherwise = Left NotHandled - -btElems bt = [ (a, [i | (i,True) <- assocs siteArr]) - | (a, siteArr) <- Map.assocs (breakpoints bt) ] - -btList bt = [(a,site) | (a, sites) <- btElems bt, site <- sites] - -sitesList bt = [ (a, sitesCoords sitesCols) | (a, sitesCols) <- Map.assocs (sites bt) ] - where sitesCoords sitesCols = - [ (row,col) - | (row, cols) <- zip [0..] sitesCols, (_,col) <- cols ] - -getSiteCoords bt a site - | Just rows <- sitesOf bt a - = head [ (r,c) | (r,row) <- zip [0..] rows - , (s,c) <- row - , s == site ] - --- addModule is dumb and inefficient, but it does the job -addModule a [] bt = bt {sites = Map.insert a [] (sites bt)} -addModule a siteCoords bt - | nrows <- maximum$ [i | (_,(i,j)) <- siteCoords ] - , sitesByRow <- [ [(s,c) | (s,(r,c)) <- siteCoords, r==i] - | i <- [0..nrows] ] - , nsites <- length siteCoords - , initialBkpts <- listArray (1, nsites) (repeat False) - = bt{ sites = Map.insert a sitesByRow (sites bt) - , breakpoints = Map.insert a initialBkpts (breakpoints bt) } - -isBkptEnabled bt (a,site) - | Just bkpts <- bkptsOf bt a - , inRange (bounds bkpts) site - = bkpts ! site - | otherwise = panic "unexpected condition: I don't know that breakpoint site" - ------------------ --- Other stuff ------------------ -refreshBkptTable :: Session -> BkptTable Module -> [ModSummary] -> IO (BkptTable Module) -refreshBkptTable sess = foldM updIfDebugging - where - updIfDebugging bt ms = do - isDebugging <- isDebuggingM ms - if isDebugging - then addModuleGHC sess bt (GHC.ms_mod ms) - else return bt - addModuleGHC sess bt mod = do - Just mod_info <- GHC.getModuleInfo sess mod - dflags <- GHC.getSessionDynFlags sess - let sites = GHC.modInfoBkptSites mod_info - debugTraceMsg dflags 2 - (ppr mod <> text ": inserted " <> int (length sites) <> - text " breakpoints") - return$ addModule mod sites bt -#if defined(GHCI) && defined(DEBUGGER) - isDebuggingM ms = isModuleInterpreted sess ms >>= \isInterpreted -> - return (Opt_Debugging `elem` dflags && - target == HscInterpreted && isInterpreted) - where dflags = flags (GHC.ms_hspp_opts ms) - target = hscTarget (GHC.ms_hspp_opts ms) -#else - isDebuggingM _ = return False -#endif +instantiateTyVarsToUnknown :: Session -> Type -> IO Type +instantiateTyVarsToUnknown (Session ref) ty + = do hsc_env <- readIORef ref + DebuggerTys.instantiateTyVarsToUnknown hsc_env ty