X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2FdeSugar%2FDsForeign.lhs;h=269274ce5a3c62fea9fb0c315f827ad7b8f21d74;hb=423d477bfecd490de1449c59325c8776f91d7aac;hp=706b73347d82f52fd486542f6ff826f337012102;hpb=f179e855e0c4c3ace51257a7175406c24f20dae3;p=ghc-hetmet.git diff --git a/ghc/compiler/deSugar/DsForeign.lhs b/ghc/compiler/deSugar/DsForeign.lhs index 706b733..269274c 100644 --- a/ghc/compiler/deSugar/DsForeign.lhs +++ b/ghc/compiler/deSugar/DsForeign.lhs @@ -9,39 +9,43 @@ Expanding out @foreign import@ and @foreign export@ declarations. module DsForeign ( dsForeigns ) where #include "HsVersions.h" +import TcRnMonad -- temp import CoreSyn import DsCCall ( dsCCall, mkFCall, boxResult, unboxArg, resultWrapper ) import DsMonad -import HsSyn ( ForeignDecl(..), ForeignExport(..), +import HsSyn ( ForeignDecl(..), ForeignExport(..), LForeignDecl, ForeignImport(..), CImportSpec(..) ) -import TcHsSyn ( TypecheckedForeignDecl ) +import MachOp ( machRepByteWidth ) +import SMRep ( argMachRep, primRepToCgRep ) import CoreUtils ( exprType, mkInlineMe ) import Id ( Id, idType, idName, mkSysLocal, setInlinePragma ) import Literal ( Literal(..) ) -import Module ( Module, moduleString ) +import Module ( moduleString ) import Name ( getOccString, NamedThing(..) ) import OccName ( encodeFS ) -import Type ( repType, eqType ) +import Type ( repType, eqType, typePrimRep ) import TcType ( Type, mkFunTys, mkForAllTys, mkTyConApp, mkFunTy, tcSplitTyConApp_maybe, tcSplitForAllTys, tcSplitFunTys, tcTyConAppArgs, ) +import BasicTypes ( Boxity(..) ) +import HscTypes ( ForeignStubs(..) ) import ForeignCall ( ForeignCall(..), CCallSpec(..), Safety(..), playSafe, - CExportSpec(..), + CExportSpec(..), CLabelString, CCallConv(..), ccallConvToInt, ccallConvAttribute ) -import CStrings ( CLabelString ) -import TysWiredIn ( unitTy, stablePtrTyCon ) -import TysPrim ( addrPrimTy ) -import PrelNames ( hasKey, ioTyConKey, newStablePtrName, bindIOName ) +import TysWiredIn ( unitTy, tupleTyCon ) +import TysPrim ( addrPrimTy, mkStablePtrPrimTy, alphaTy ) +import PrelNames ( hasKey, ioTyConKey, stablePtrTyConName, newStablePtrName, bindIOName, + checkDotnetResName ) import BasicTypes ( Activation( NeverActive ) ) -import ErrUtils ( addShortWarnLocLine ) +import SrcLoc ( Located(..), unLoc ) import Outputable import Maybe ( fromJust ) import FastString @@ -64,38 +68,42 @@ so we reuse the desugaring code in @DsCCall@ to deal with these. type Binding = (Id, CoreExpr) -- No rec/nonrec structure; -- the occurrence analyser will sort it all out -dsForeigns :: Module - -> [TypecheckedForeignDecl] - -> DsM ( [Id] -- Foreign-exported binders; - -- we have to generate code to register these - , [Binding] - , SDoc -- Header file prototypes for - -- "foreign exported" functions. - , SDoc -- C stubs to use when calling - -- "foreign exported" functions. - , [FastString] -- headers that need to be included - -- into C code generated for this module - ) -dsForeigns mod_name fos - = foldlDs combine ([], [], empty, empty, []) fos +dsForeigns :: [LForeignDecl Id] + -> DsM (ForeignStubs, [Binding]) +dsForeigns [] + = returnDs (NoStubs, []) +dsForeigns fos + = foldlDs combine (ForeignStubs empty empty [] [], []) fos where - combine (acc_feb, acc_f, acc_h, acc_c, acc_header) - (ForeignImport id _ spec depr loc) - = dsFImport mod_name id spec `thenDs` \(bs, h, c, hd) -> + combine (ForeignStubs acc_h acc_c acc_hdrs acc_feb, acc_f) + (L loc (ForeignImport id _ spec depr)) + = traceIf (text "fi start" <+> ppr id) `thenDs` \ _ -> + dsFImport (unLoc id) spec `thenDs` \ (bs, h, c, mbhd) -> + warnDepr depr loc `thenDs` \ _ -> + traceIf (text "fi end" <+> ppr id) `thenDs` \ _ -> + returnDs (ForeignStubs (h $$ acc_h) + (c $$ acc_c) + (addH mbhd acc_hdrs) + acc_feb, + bs ++ acc_f) + + combine (ForeignStubs acc_h acc_c acc_hdrs acc_feb, acc_f) + (L loc (ForeignExport (L _ id) _ (CExport (CExportStatic ext_nm cconv)) depr)) + = dsFExport id (idType id) + ext_nm cconv False `thenDs` \(h, c, _) -> warnDepr depr loc `thenDs` \_ -> - returnDs (acc_feb, bs ++ acc_f, h $$ acc_h, c $$ acc_c, hd ++ acc_header) + returnDs (ForeignStubs (h $$ acc_h) (c $$ acc_c) acc_hdrs (id:acc_feb), + acc_f) - combine (acc_feb, acc_f, acc_h, acc_c, acc_header) - (ForeignExport id _ (CExport (CExportStatic ext_nm cconv)) depr loc) - = dsFExport mod_name id (idType id) - ext_nm cconv False `thenDs` \(h, c) -> - warnDepr depr loc `thenDs` \_ -> - returnDs (acc_feb, acc_f, h $$ acc_h, c $$ acc_c, acc_header) + addH Nothing ls = ls + addH (Just e) ls + | e `elem` ls = ls + | otherwise = e:ls warnDepr False _ = returnDs () - warnDepr True loc = dsWarn (addShortWarnLocLine loc msg) - where - msg = ptext SLIT("foreign declaration uses deprecated non-standard syntax") + warnDepr True loc = dsWarn (loc, msg) + where + msg = ptext SLIT("foreign declaration uses deprecated non-standard syntax") \end{code} @@ -124,36 +132,53 @@ inside returned tuples; but inlining this wrapper is a Really Good Idea because it exposes the boxing to the call site. \begin{code} -dsFImport :: Module - -> Id +dsFImport :: Id -> ForeignImport - -> DsM ([Binding], SDoc, SDoc, [FastString]) -dsFImport modName id (CImport cconv safety header lib spec) - = dsCImport modName id spec cconv safety `thenDs` \(ids, h, c) -> - returnDs (ids, h, c, if nullFastString header then [] else [header]) + -> DsM ([Binding], SDoc, SDoc, Maybe FastString) +dsFImport id (CImport cconv safety header lib spec) + = dsCImport id spec cconv safety no_hdrs `thenDs` \(ids, h, c) -> + returnDs (ids, h, c, if no_hdrs then Nothing else Just header) + where + no_hdrs = nullFastString header + -- FIXME: the `lib' field is needed for .NET ILX generation when invoking -- routines that are external to the .NET runtime, but GHC doesn't -- support such calls yet; if `nullFastString lib', the value was not given -dsFImport modName id (DNImport spec) - = dsFCall modName id (DNCall spec) `thenDs` \(ids, h, c) -> - returnDs (ids, h, c, []) +dsFImport id (DNImport spec) + = dsFCall id (DNCall spec) True {- No headers -} `thenDs` \(ids, h, c) -> + returnDs (ids, h, c, Nothing) -dsCImport :: Module - -> Id +dsCImport :: Id -> CImportSpec -> CCallConv -> Safety + -> Bool -- True <=> no headers in the f.i decl -> DsM ([Binding], SDoc, SDoc) -dsCImport modName id (CLabel cid) _ _ - = ASSERT(fromJust resTy `eqType` addrPrimTy) -- typechecker ensures this - returnDs ([(id, rhs)], empty, empty) - where - (resTy, foRhs) = resultWrapper (idType id) - rhs = foRhs (mkLit (MachLabel cid)) -dsCImport modName id (CFunction target) cconv safety - = dsFCall modName id (CCall (CCallSpec target cconv safety)) -dsCImport modName id CWrapper cconv _ - = dsFExportDynamic modName id cconv +dsCImport id (CLabel cid) _ _ no_hdrs + = resultWrapper (idType id) `thenDs` \ (resTy, foRhs) -> + ASSERT(fromJust resTy `eqType` addrPrimTy) -- typechecker ensures this + let rhs = foRhs (mkLit (MachLabel cid Nothing)) in + returnDs ([(setImpInline no_hdrs id, rhs)], empty, empty) +dsCImport id (CFunction target) cconv safety no_hdrs + = dsFCall id (CCall (CCallSpec target cconv safety)) no_hdrs +dsCImport id CWrapper cconv _ _ + = dsFExportDynamic id cconv + +setImpInline :: Bool -- True <=> No #include headers + -- in the foreign import declaration + -> Id -> Id +-- If there is a #include header in the foreign import +-- we make the worker non-inlinable, because we currently +-- don't keep the #include stuff in the CCallId, and hence +-- it won't be visible in the importing module, which can be +-- fatal. +-- (The #include stuff is just collected from the foreign import +-- decls in a module.) +-- If you want to do cross-module inlining of the c-calls themselves, +-- put the #include stuff in the package spec, not the foreign +-- import decl. +setImpInline True id = id +setImpInline False id = id `setInlinePragma` NeverActive \end{code} @@ -164,7 +189,7 @@ dsCImport modName id CWrapper cconv _ %************************************************************************ \begin{code} -dsFCall mod_Name fn_id fcall +dsFCall fn_id fcall no_hdrs = let ty = idType fn_id (tvs, fun_ty) = tcSplitForAllTys ty @@ -183,17 +208,44 @@ dsFCall mod_Name fn_id fcall -- ForeignObj#s live across a 'safe' foreign import). maybe_arg_ids | unsafe_call fcall = work_arg_ids | otherwise = [] + + forDotnet = + case fcall of + DNCall{} -> True + _ -> False + + topConDs + | forDotnet = + dsLookupGlobalId checkDotnetResName `thenDs` \ check_id -> + return (Just check_id) + | otherwise = return Nothing + + augmentResultDs + | forDotnet = + newSysLocalDs addrPrimTy `thenDs` \ err_res -> + returnDs (\ (mb_res_ty, resWrap) -> + case mb_res_ty of + Nothing -> (Just (mkTyConApp (tupleTyCon Unboxed 1) + [ addrPrimTy ]), + resWrap) + Just x -> (Just (mkTyConApp (tupleTyCon Unboxed 2) + [ x, addrPrimTy ]), + resWrap)) + | otherwise = returnDs id in - boxResult maybe_arg_ids io_res_ty `thenDs` \ (ccall_result_ty, res_wrapper) -> + augmentResultDs `thenDs` \ augment -> + topConDs `thenDs` \ topCon -> + boxResult maybe_arg_ids augment topCon io_res_ty `thenDs` \ (ccall_result_ty, res_wrapper) -> - getUniqueDs `thenDs` \ ccall_uniq -> - getUniqueDs `thenDs` \ work_uniq -> + newUnique `thenDs` \ ccall_uniq -> + newUnique `thenDs` \ work_uniq -> let -- Build the worker worker_ty = mkForAllTys tvs (mkFunTys (map idType work_arg_ids) ccall_result_ty) the_ccall_app = mkFCall ccall_uniq fcall val_args ccall_result_ty work_rhs = mkLams tvs (mkLams work_arg_ids the_ccall_app) - work_id = mkSysLocal (encodeFS FSLIT("$wccall")) work_uniq worker_ty + work_id = setImpInline no_hdrs $ -- See comments with setImpInline + mkSysLocal (encodeFS FSLIT("$wccall")) work_uniq worker_ty -- Build the wrapper work_app = mkApps (mkVarApps (Var work_id) tvs) val_args @@ -225,8 +277,7 @@ For each `@foreign export foo@' in a module M we generate: the user-written Haskell function `@M.foo@'. \begin{code} -dsFExport :: Module - -> Id -- Either the exported Id, +dsFExport :: Id -- Either the exported Id, -- or the foreign-export-dynamic constructor -> Type -- The type of the thing callable from C -> CLabelString -- The name to export to C land @@ -236,12 +287,13 @@ dsFExport :: Module -- the first argument's stable pointer -> DsM ( SDoc -- contents of Module_stub.h , SDoc -- contents of Module_stub.c + , [Type] -- arguments expected by stub function. ) -dsFExport mod_name fn_id ty ext_name cconv isDyn +dsFExport fn_id ty ext_name cconv isDyn = let - (tvs,sans_foralls) = tcSplitForAllTys ty + (_tvs,sans_foralls) = tcSplitForAllTys ty (fe_arg_tys', orig_res_ty) = tcSplitFunTys sans_foralls -- We must use tcSplits here, because we want to see -- the (IO t) in the corner of the type! @@ -265,15 +317,10 @@ dsFExport mod_name fn_id ty ext_name cconv isDyn ) `thenDs` \ (res_ty, -- t is_IO_res_ty) -> -- Bool - getModuleDs - `thenDs` \ mod -> - let - (h_stub, c_stub) - = mkFExportCBits ext_name - (if isDyn then Nothing else Just fn_id) - fe_arg_tys res_ty is_IO_res_ty cconv - in - returnDs (h_stub, c_stub) + returnDs $ + mkFExportCBits ext_name + (if isDyn then Nothing else Just fn_id) + fe_arg_tys res_ty is_IO_res_ty cconv \end{code} @foreign export dynamic@ lets you dress up Haskell IO actions @@ -299,33 +346,34 @@ foreign export "f_helper" f_helper :: StablePtr (Addr -> Int -> IO Int) -> Addr \end{verbatim} \begin{code} -dsFExportDynamic :: Module - -> Id +dsFExportDynamic :: Id -> CCallConv -> DsM ([Binding], SDoc, SDoc) -dsFExportDynamic mod_name id cconv - = newSysLocalDs ty `thenDs` \ fe_id -> +dsFExportDynamic id cconv + = newSysLocalDs ty `thenDs` \ fe_id -> + getModuleDs `thenDs` \ mod_name -> let -- hack: need to get at the name of the C stub we're about to generate. fe_nm = mkFastString (moduleString mod_name ++ "_" ++ toCName fe_id) in - dsFExport mod_name id export_ty fe_nm cconv True `thenDs` \ (h_code, c_code) -> - newSysLocalDs arg_ty `thenDs` \ cback -> - dsLookupGlobalValue newStablePtrName `thenDs` \ newStablePtrId -> + newSysLocalDs arg_ty `thenDs` \ cback -> + dsLookupGlobalId newStablePtrName `thenDs` \ newStablePtrId -> + dsLookupTyCon stablePtrTyConName `thenDs` \ stable_ptr_tycon -> let - mk_stbl_ptr_app = mkApps (Var newStablePtrId) [ Type arg_ty, Var cback ] + mk_stbl_ptr_app = mkApps (Var newStablePtrId) [ Type arg_ty, Var cback ] + stable_ptr_ty = mkTyConApp stable_ptr_tycon [arg_ty] + export_ty = mkFunTy stable_ptr_ty arg_ty in - dsLookupGlobalValue bindIOName `thenDs` \ bindIOId -> - newSysLocalDs (mkTyConApp stablePtrTyCon [arg_ty]) `thenDs` \ stbl_value -> + dsLookupGlobalId bindIOName `thenDs` \ bindIOId -> + newSysLocalDs stable_ptr_ty `thenDs` \ stbl_value -> + dsFExport id export_ty fe_nm cconv True `thenDs` \ (h_code, c_code, stub_args) -> let - stbl_app cont ret_ty - = mkApps (Var bindIOId) - [ Type (mkTyConApp stablePtrTyCon [arg_ty]) - , Type ret_ty - , mk_stbl_ptr_app - , cont - ] - + stbl_app cont ret_ty = mkApps (Var bindIOId) + [ Type stable_ptr_ty + , Type ret_ty + , mk_stbl_ptr_app + , cont + ] {- The arguments to the external function which will create a little bit of (template) code on the fly @@ -335,13 +383,18 @@ dsFExportDynamic mod_name id cconv -} adj_args = [ mkIntLitInt (ccallConvToInt cconv) , Var stbl_value - , mkLit (MachLabel fe_nm) + , mkLit (MachLabel fe_nm mb_sz_args) ] -- name of external entry point providing these services. -- (probably in the RTS.) - adjustor = FSLIT("createAdjustor") + adjustor = FSLIT("createAdjustor") + + sz_args = sum (map (machRepByteWidth.argMachRep.primRepToCgRep.typePrimRep) stub_args) + mb_sz_args = case cconv of + StdCallConv -> Just sz_args + _ -> Nothing in - dsCCall adjustor adj_args PlayRisky False io_res_ty `thenDs` \ ccall_adj -> + dsCCall adjustor adj_args PlayRisky io_res_ty `thenDs` \ ccall_adj -> -- PlayRisky: the adjustor doesn't allocate in the Haskell heap or do a callback let ccall_adj_ty = exprType ccall_adj ccall_io_adj = mkLams [stbl_value] $ @@ -362,7 +415,6 @@ dsFExportDynamic mod_name id cconv ([arg_ty], io_res_ty) = tcSplitFunTys sans_foralls [res_ty] = tcTyConAppArgs io_res_ty -- Must use tcSplit* to see the (IO t), which is a newtype - export_ty = mkFunTy (mkTyConApp stablePtrTyCon [arg_ty]) arg_ty toCName :: Id -> String toCName i = showSDoc (pprCode CStyle (ppr (idName i))) @@ -385,9 +437,9 @@ mkFExportCBits :: FastString -> Type -> Bool -- True <=> returns an IO type -> CCallConv - -> (SDoc, SDoc) + -> (SDoc, SDoc, [Type]) mkFExportCBits c_nm maybe_target arg_htys res_hty is_IO_res_ty cc - = (header_bits, c_bits) + = (header_bits, c_bits, all_arg_tys) where -- Create up types and names for the real args arg_cnames, arg_ctys :: [SDoc] @@ -396,18 +448,21 @@ mkFExportCBits c_nm maybe_target arg_htys res_hty is_IO_res_ty cc -- and also for auxiliary ones; the stable ptr in the dynamic case, and -- a slot for the dummy return address in the dynamic + ccall case - extra_cnames_and_ctys + extra_cnames_and_tys = case maybe_target of - Nothing -> [(text "the_stableptr", text "StgStablePtr")] + Nothing -> [((text "the_stableptr", text "StgStablePtr"), mkStablePtrPrimTy alphaTy)] other -> [] ++ case (maybe_target, cc) of - (Nothing, CCallConv) -> [(text "original_return_addr", text "void*")] + (Nothing, CCallConv) -> [((text "original_return_addr", text "void*"), addrPrimTy)] other -> [] all_cnames_and_ctys :: [(SDoc, SDoc)] all_cnames_and_ctys - = extra_cnames_and_ctys ++ zip arg_cnames arg_ctys + = map fst extra_cnames_and_tys ++ zip arg_cnames arg_ctys + + all_arg_tys + = map snd extra_cnames_and_tys ++ arg_htys -- stuff to do with the return type of the C function res_hty_is_unit = res_hty `eqType` unitTy -- Look through any newtypes @@ -442,9 +497,12 @@ mkFExportCBits c_nm maybe_target arg_htys res_hty is_IO_res_ty cc -- various other bits for inside the fn declareResult = text "HaskellObj ret;" + declareCResult | res_hty_is_unit = empty + | otherwise = cResType <+> text "cret;" - return_what | res_hty_is_unit = empty - | otherwise = parens (unpackHObj res_hty <> parens (text "ret")) + assignCResult | res_hty_is_unit = empty + | otherwise = + text "cret=" <> unpackHObj res_hty <> parens (text "ret") <> semi -- an extern decl for the fn being called extern_decl @@ -461,13 +519,26 @@ mkFExportCBits c_nm maybe_target arg_htys res_hty is_IO_res_ty cc [ lbrace , text "SchedulerStatus rc;" , declareResult + , declareCResult + , text "rts_lock();" -- create the application + perform it. - , text (if is_IO_res_ty then "rc=rts_evalIO" else "rc=rts_eval") - <> parens (expr_to_run <+> comma <> text "&ret") - <> semi + , text "rc=rts_evalIO" <> parens ( + text "rts_apply" <> parens ( + text "(HaskellObj)" + <> text (if is_IO_res_ty + then "runIO_closure" + else "runNonIO_closure") + <> comma + <> expr_to_run + ) <+> comma + <> text "&ret" + ) <> semi , text "rts_checkSchedStatus" <> parens (doubleQuotes (ftext c_nm) <> comma <> text "rc") <> semi - , text "return" <> return_what <> semi + , assignCResult + , text "rts_unlock();" + , if res_hty_is_unit then empty + else text "return cret;" , rbrace ]