\begin{code}
module HscMain ( HscResult(..), hscMain,
#ifdef GHCI
- hscStmt,
+ hscStmt, hscThing, hscModuleContents,
#endif
initPersistentCompilerState ) where
#include "HsVersions.h"
#ifdef GHCI
+import Interpreter
import ByteCodeGen ( byteCodeGen )
import CoreTidy ( tidyCoreExpr )
import CorePrep ( corePrepExpr )
-import Rename ( renameStmt )
+import Rename ( renameStmt, renameRdrName, slurpIface )
+import RdrName ( rdrNameOcc, setRdrNameOcc )
import RdrHsSyn ( RdrNameStmt )
+import OccName ( dataName, tcClsName,
+ occNameSpace, setOccNameSpace )
import Type ( Type )
import Id ( Id, idName, setGlobalIdDetails )
import IdInfo ( GlobalIdDetails(VanillaGlobal) )
-import HscTypes ( InteractiveContext(..) )
+import Name ( isLocalName )
+import NameEnv ( lookupNameEnv )
+import RdrName ( rdrEnvElts )
import PrelNames ( iNTERACTIVE )
import StringBuffer ( stringToStringBuffer )
+import FastString ( mkFastString )
+import Maybes ( catMaybes )
+
+import List ( nub )
#endif
import HsSyn
+import RdrName ( mkRdrOrig )
import Id ( idName )
import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) )
import StringBuffer ( hGetStringBuffer, freeStringBuffer )
import Rename ( checkOldIface, renameModule, closeIfaceDecls )
import Rules ( emptyRuleBase )
import PrelInfo ( wiredInThingEnv, wiredInThings )
-import PrelNames ( vanillaSyntaxMap, knownKeyNames )
+import PrelRules ( builtinRules )
+import PrelNames ( knownKeyNames )
import MkIface ( mkFinalIface )
import TcModule
import InstEnv ( emptyInstEnv )
import CodeOutput ( codeOutput )
import Module ( ModuleName, moduleName, mkHomeModule,
- moduleUserString )
+ moduleUserString, lookupModuleEnv )
import CmdLineOpts
+import DriverState ( v_HCHeader )
import ErrUtils ( dumpIfSet_dyn, showPass, printError )
import Util ( unJust )
import UniqSupply ( mkSplitUniqSupply )
-import Bag ( emptyBag )
+import Bag ( consBag, emptyBag )
import Outputable
-import Interpreter
-import CmStaticInfo ( GhciMode(..) )
import HscStats ( ppSourceStats )
import HscTypes
import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
import NameEnv ( emptyNameEnv, mkNameEnv )
import Module ( Module )
-import IOExts ( newIORef, readIORef, writeIORef, unsafePerformIO )
+import IOExts ( newIORef, readIORef, writeIORef, modifyIORef,
+ unsafePerformIO )
import Monad ( when )
import Maybe ( isJust, fromJust )
ModIface -- new iface (if any compilation was done)
Bool -- stub_h exists
Bool -- stub_c exists
+#ifdef GHCI
(Maybe ([UnlinkedBCO],ItblEnv)) -- interpreted code, if any
-
+#else
+ (Maybe ()) -- no interpreted code whatsoever
+#endif
-- no errors or warnings; the individual passes
-- (parse/rename/typecheck) print messages themselves
hscMain ghci_mode dflags mod location source_unchanged have_object
maybe_old_iface hst hit pcs
- = do {
+ = {-# SCC "hscMain" #-}
+ do {
showPass dflags ("Checking old interface for hs = "
++ show (ml_hs_file location)
++ ", hspp = " ++ show (ml_hspp_file location));
(pcs_ch, errs_found, (recomp_reqd, maybe_checked_iface))
<- _scc_ "checkOldIface"
- checkOldIface ghci_mode dflags hit hst pcs (ml_hi_file location)
+ checkOldIface ghci_mode dflags hit hst pcs mod (ml_hi_file location)
source_unchanged maybe_old_iface;
if errs_found then
mod location (Just old_iface) hst hit pcs_ch
| ghci_mode == OneShot
= do {
- hPutStrLn stderr "compilation IS NOT required";
+ when (verbosity dflags > 0) $
+ hPutStrLn stderr "compilation IS NOT required";
let { bomb = panic "hscNoRecomp:OneShot" };
return (HscNoRecomp pcs_ch bomb bomb)
}
= do {
when (verbosity dflags >= 1) $
hPutStrLn stderr ("Skipping " ++
- compMsg have_object mod location);
+ showModMsg have_object mod location);
-- CLOSURE
(pcs_cl, closure_errs, cl_hs_decls)
-- TYPECHECK
maybe_tc_result
- <- typecheckIface dflags pcs_cl hst old_iface (vanillaSyntaxMap, cl_hs_decls);
+ <- typecheckIface dflags pcs_cl hst old_iface cl_hs_decls;
case maybe_tc_result of {
Nothing -> return (HscFail pcs_cl);
return (HscNoRecomp pcs_tc new_details old_iface)
}}}
-compMsg use_object mod location =
- mod_str ++ take (max 0 (16 - length mod_str)) (repeat ' ')
- ++" ( " ++ unJust "hscRecomp" (ml_hs_file location) ++ ", "
- ++ (if use_object
- then unJust "hscRecomp" (ml_obj_file location)
- else "interpreted")
- ++ " )"
- where mod_str = moduleUserString mod
-
-
hscRecomp ghci_mode dflags have_object
mod location maybe_checked_iface hst hit pcs_ch
= do {
-- what target are we shooting for?
; let toInterp = dopt_HscLang dflags == HscInterpreted
+ ; let toNothing = dopt_HscLang dflags == HscNothing
- ; when (verbosity dflags >= 1) $
+ ; when (ghci_mode /= OneShot && verbosity dflags >= 1) $
hPutStrLn stderr ("Compiling " ++
- compMsg (not toInterp) mod location);
+ showModMsg (not toInterp) mod location);
-------------------
-- PARSE
; case maybe_rn_result of {
Nothing -> return (HscFail pcs_ch{-was: pcs_rn-});
Just (is_exported, new_iface, rn_hs_decls) -> do {
-
- -- In interactive mode, we don't want to discard any top-level entities at
- -- all (eg. do not inline them away during simplification), and retain them
- -- all in the TypeEnv so they are available from the command line.
- --
- -- isGlobalName separates the user-defined top-level names from those
- -- introduced by the type checker.
+
+ -- In interactive mode, we don't want to discard any top-level
+ -- entities at all (eg. do not inline them away during
+ -- simplification), and retain them all in the TypeEnv so they are
+ -- available from the command line.
+ --
+ -- isGlobalName separates the user-defined top-level names from those
+ -- introduced by the type checker.
+
; let dont_discard | ghci_mode == Interactive = isGlobalName
| otherwise = is_exported
-- TYPECHECK
-------------------
; maybe_tc_result
- <- _scc_ "TypeCheck" typecheckModule dflags pcs_rn hst new_iface
+ <- _scc_ "TypeCheck"
+ typecheckModule dflags pcs_rn hst new_iface
print_unqualified rn_hs_decls
; case maybe_tc_result of {
Nothing -> return (HscFail pcs_ch{-was: pcs_rn-});
deSugar dflags pcs_tc hst this_mod print_unqualified tc_result
; pcs_middle
- <- if ghci_mode == OneShot
+ <- _scc_ "pcs_middle"
+ if ghci_mode == OneShot
then do init_pcs <- initPersistentCompilerState
init_prs <- initPersistentRenamerState
let
pcs_rules = rules }
else return pcs_tc
+ -- alive at this point:
+ -- pcs_middle
+ -- foreign_stuff
+ -- ds_details
+ -- new_iface
+
-------------------
-- SIMPLIFY
-------------------
-- new_iface
; emitExternalCore dflags new_iface tidy_details
+
+ ; let final_details = tidy_details {md_binds = []}
+ ; final_details `seq` return ()
+
-------------------
-- PREPARE FOR CODE GENERATION
-------------------
-- Do saturation and convert to A-normal form
- ; prepd_details <- _scc_ "CorePrep" corePrepPgm dflags tidy_details
+ ; prepd_details <- _scc_ "CorePrep"
+ corePrepPgm dflags tidy_details
-------------------
-- CONVERT TO STG and COMPLETE CODE GENERATION
mod_name_to_Module nm
= do m <- findModule nm ; return (fst (fromJust m))
- (h_code,c_code,fe_binders) = foreign_stuff
+ (h_code, c_code, headers, fe_binders) = foreign_stuff
+
+ -- turn the list of headers requested in foreign import
+ -- declarations into a string suitable for emission into generated
+ -- C code...
+ --
+ foreign_headers =
+ unlines
+ . map (\fname -> "#include \"" ++ _UNPK_ fname ++ "\"")
+ . reverse
+ $ headers
+
+ -- ...and add the string to the headers requested via command line
+ -- options
+ --
+ ; modifyIORef v_HCHeader (++ foreign_headers)
; imported_modules <- mapM mod_name_to_Module imported_module_names
; (stub_h_exists, stub_c_exists, maybe_bcos, final_iface )
<- if toInterp
+#ifdef GHCI
then do
----------------- Generate byte code ------------------
(bcos,itbl_env) <- byteCodeGen dflags binds
maybe_checked_iface new_iface tidy_details
return ( False, False, Just (bcos,itbl_env), final_iface )
+#else
+ then error "GHC not compiled with interpreter"
+#endif
else do
----------------- Convert to STG ------------------
(stg_binds, cost_centre_info, stg_back_end_info)
<- _scc_ "CoreToStg"
- myCoreToStg dflags this_mod binds
+ myCoreToStg dflags this_mod binds
-- Fill in the code-gen info for the earlier tidyCorePgm
writeIORef cg_info_ref (Just stg_back_end_info)
final_iface <- _scc_ "MkFinalIface"
mkFinalIface ghci_mode dflags location
maybe_checked_iface new_iface tidy_details
-
- ------------------ Code generation ------------------
- abstractC <- _scc_ "CodeGen"
- codeGen dflags this_mod imported_modules
- cost_centre_info fe_binders
- local_tycons stg_binds
-
- ------------------ Code output -----------------------
- (stub_h_exists, stub_c_exists)
- <- codeOutput dflags this_mod local_tycons
- binds stg_binds
- c_code h_code abstractC
-
- return (stub_h_exists, stub_c_exists, Nothing, final_iface)
-
- ; let final_details = tidy_details {md_binds = []}
-
+ if toNothing
+ then do
+ return (False, False, Nothing, final_iface)
+ else do
+ ------------------ Code generation ------------------
+ abstractC <- _scc_ "CodeGen"
+ codeGen dflags this_mod imported_modules
+ cost_centre_info fe_binders
+ local_tycons stg_binds
+
+ ------------------ Code output -----------------------
+ (stub_h_exists, stub_c_exists)
+ <- codeOutput dflags this_mod [] --local_tycons
+ binds stg_binds
+ c_code h_code abstractC
+
+ return (stub_h_exists, stub_c_exists, Nothing, final_iface)
-- and the answer is ...
; return (HscRecomp pcs_final
() <- coreBindsSize tidy_binds `seq` return ()
-- TEMP: the above call zaps some space usage allocated by the
-- simplifier, which for reasons I don't understand, persists
- -- thoroughout code generation
+ -- thoroughout code generation -- JRS
+ --
+ -- This is still necessary. -- SDM (10 Dec 2001)
- stg_binds <- _scc_ "Core2Stg" coreToStg dflags tidy_binds
+ stg_binds <- _scc_ "Core2Stg"
+ coreToStg dflags tidy_binds
- (stg_binds2, cost_centre_info)
- <- _scc_ "Core2Stg" stg2stg dflags this_mod stg_binds
+ (stg_binds2, cost_centre_info) <- _scc_ "Core2Stg"
+ stg2stg dflags this_mod stg_binds
let env_rhs :: CgInfoEnv
- env_rhs = mkNameEnv [ (idName bndr, CgInfo (stgRhsArity rhs) caf_info)
+ env_rhs = mkNameEnv [ caf_info `seq` (idName bndr, CgInfo caf_info)
| (bind,_) <- stg_binds2,
let caf_info
| stgBindHasCafRefs bind = MayHaveCafRefs
- | otherwise = NoCafRefs,
- (bndr,rhs) <- stgBindPairs bind ]
+ | otherwise = NoCafRefs,
+ bndr <- stgBinders bind ]
return (stg_binds2, cost_centre_info, env_rhs)
- where
- stgBindPairs (StgNonRec _ b r) = [(b,r)]
- stgBindPairs (StgRec _ prs) = prs
-
-
\end{code}
\begin{code}
hscStmt dflags hst hit pcs0 icontext stmt just_expr
- = let
- InteractiveContext {
- ic_rn_env = rn_env,
- ic_type_env = type_env,
- ic_module = scope_mod } = icontext
- in
- do { maybe_stmt <- hscParseStmt dflags stmt
+ = do { maybe_stmt <- hscParseStmt dflags stmt
; case maybe_stmt of
Nothing -> return (pcs0, Nothing)
Just parsed_stmt -> do {
- let { notExprStmt (ExprStmt _ _) = False;
- notExprStmt _ = True
+ let { notExprStmt (ExprStmt _ _ _) = False;
+ notExprStmt _ = True
};
if (just_expr && notExprStmt parsed_stmt)
-- Rename it
(pcs1, print_unqual, maybe_renamed_stmt)
- <- renameStmt dflags hit hst pcs0 scope_mod
- iNTERACTIVE rn_env parsed_stmt
+ <- renameStmt dflags hit hst pcs0 icontext parsed_stmt
; case maybe_renamed_stmt of
Nothing -> return (pcs0, Nothing)
-- Typecheck it
maybe_tc_return <-
if just_expr
- then case rn_stmt of { (syn, ExprStmt e _, decls) ->
- typecheckExpr dflags pcs1 hst type_env
- print_unqual iNTERACTIVE (syn,e,decls) }
- else typecheckStmt dflags pcs1 hst type_env
+ then case rn_stmt of { (ExprStmt e _ _, decls) ->
+ typecheckExpr dflags pcs1 hst (ic_type_env icontext)
+ print_unqual iNTERACTIVE (e,decls) }
+ else typecheckStmt dflags pcs1 hst (ic_type_env icontext)
print_unqual iNTERACTIVE bound_names rn_stmt
; case maybe_tc_return of
hscParseStmt dflags str
= do -------------------------- Parser ----------------
showPass dflags "Parser"
- _scc_ "Parser" do
+ _scc_ "Parser" do
buf <- stringToStringBuffer str
case parseStmt buf PState{ bol = 0#, atbol = 1#,
context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc SLIT("<no file>") 0 } of {
+ loc = mkSrcLoc SLIT("<interactive>") 1 } of {
PFailed err -> do { hPutStrLn stderr (showSDoc err);
-- Not yet implemented in <4.11 freeStringBuffer buf;
%************************************************************************
%* *
+\subsection{Getting information about an identifer}
+%* *
+%************************************************************************
+
+\begin{code}
+#ifdef GHCI
+hscThing -- like hscStmt, but deals with a single identifier
+ :: DynFlags
+ -> HomeSymbolTable
+ -> HomeIfaceTable
+ -> PersistentCompilerState -- IN: persistent compiler state
+ -> InteractiveContext -- Context for compiling
+ -> String -- The identifier
+ -> IO ( PersistentCompilerState,
+ [TyThing] )
+
+hscThing dflags hst hit pcs0 ic str
+ = do maybe_rdr_name <- myParseIdentifier dflags str
+ case maybe_rdr_name of {
+ Nothing -> return (pcs0, []);
+ Just rdr_name -> do
+
+ -- if the identifier is a constructor (begins with an
+ -- upper-case letter), then we need to consider both
+ -- constructor and type class identifiers.
+ let rdr_names
+ | occNameSpace occ == dataName = [ rdr_name, tccls_name ]
+ | otherwise = [ rdr_name ]
+ where
+ occ = rdrNameOcc rdr_name
+ tccls_occ = setOccNameSpace occ tcClsName
+ tccls_name = setRdrNameOcc rdr_name tccls_occ
+
+ (pcs, unqual, maybe_rn_result) <-
+ renameRdrName dflags hit hst pcs0 ic rdr_names
+
+ case maybe_rn_result of {
+ Nothing -> return (pcs, []);
+ Just (names, decls) -> do {
+
+ maybe_pcs <- typecheckExtraDecls dflags pcs hst unqual
+ iNTERACTIVE decls;
+
+ case maybe_pcs of {
+ Nothing -> return (pcs, []);
+ Just pcs ->
+ let do_lookup n
+ | isLocalName n = lookupNameEnv (ic_type_env ic) n
+ | otherwise = lookupType hst (pcs_PTE pcs) n
+
+ maybe_ty_things = map do_lookup names
+ in
+ return (pcs, catMaybes maybe_ty_things) }
+ }}}
+
+myParseIdentifier dflags str
+ = do buf <- stringToStringBuffer str
+
+ let glaexts | dopt Opt_GlasgowExts dflags = 1#
+ | otherwise = 0#
+
+ case parseIdentifier buf
+ PState{ bol = 0#, atbol = 1#,
+ context = [], glasgow_exts = glaexts,
+ loc = mkSrcLoc SLIT("<interactive>") 1 } of
+
+ PFailed err -> do { hPutStrLn stderr (showSDoc err);
+ freeStringBuffer buf;
+ return Nothing }
+
+ POk _ rdr_name -> do { --should, but can't: freeStringBuffer buf;
+ return (Just rdr_name) }
+#endif
+\end{code}
+
+%************************************************************************
+%* *
+\subsection{Find all the things defined in a module}
+%* *
+%************************************************************************
+
+\begin{code}
+#ifdef GHCI
+hscModuleContents
+ :: DynFlags
+ -> HomeSymbolTable
+ -> HomeIfaceTable
+ -> PersistentCompilerState -- IN: persistent compiler state
+ -> Module -- module to inspect
+ -> Bool -- grab just the exports, or the whole toplev
+ -> IO (PersistentCompilerState, Maybe [TyThing])
+
+hscModuleContents dflags hst hit pcs0 mod exports_only = do {
+
+ -- slurp the interface if necessary
+ (pcs1, print_unqual, maybe_rn_stuff)
+ <- slurpIface dflags hit hst pcs0 mod;
+
+ case maybe_rn_stuff of {
+ Nothing -> return (pcs0, Nothing);
+ Just (names, rn_decls) -> do {
+
+ -- Typecheck the declarations
+ maybe_pcs <-
+ typecheckExtraDecls dflags pcs1 hst print_unqual iNTERACTIVE rn_decls;
+
+ case maybe_pcs of {
+ Nothing -> return (pcs1, Nothing);
+ Just pcs2 ->
+
+ let { all_names
+ | exports_only = names
+ | otherwise =
+ let { iface = fromJust (lookupModuleEnv hit mod);
+ env = fromJust (mi_globals iface);
+ range = rdrEnvElts env;
+ } in
+ -- grab all the things from the global env that are locally def'd
+ nub [ n | elts <- range, GRE n LocalDef _ <- elts ];
+
+ pte = pcs_PTE pcs2;
+
+ ty_things = map (fromJust . lookupType hst pte) all_names;
+
+ } in
+
+ return (pcs2, Just ty_things)
+ }}}}
+#endif
+\end{code}
+
+%************************************************************************
+%* *
\subsection{Initial persistent state}
%* *
%************************************************************************
nsIPs = emptyFM },
prsDecls = (emptyNameEnv, 0),
prsInsts = (emptyBag, 0),
- prsRules = (emptyBag, 0),
+ prsRules = foldr add_rule (emptyBag, 0) builtinRules,
prsImpMods = emptyFM
}
)
+ where
+ add_rule (name,rule) (rules, n_rules)
+ = (gated_decl `consBag` rules, n_rules+1)
+ where
+ gated_decl = (gate_fn, (mod, IfaceRuleOut rdr_name rule))
+ mod = nameModule name
+ rdr_name = mkRdrOrig (moduleName mod) (nameOccName name)
+ gate_fn vis_fn = vis_fn name -- Load the rule whenever name is visible
initOrigNames :: FiniteMap (ModuleName,OccName) Name
initOrigNames
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