X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FdeSugar%2FDsForeign.lhs;h=9dea2ade73665cc9c15b6b852df88f0206e657bf;hp=d7096ae7caa541cd5d8ffd16f1e0bb1714c871e8;hb=5b7e2a875b089f31cd8dedb52d47ef9a93f276be;hpb=aee37b142fea58ec68dc6fa3d24dc3563f1bdaf6 diff --git a/compiler/deSugar/DsForeign.lhs b/compiler/deSugar/DsForeign.lhs index d7096ae..9dea2ad 100644 --- a/compiler/deSugar/DsForeign.lhs +++ b/compiler/deSugar/DsForeign.lhs @@ -6,13 +6,6 @@ Desugaring foreign declarations (see also DsCCall). \begin{code} -{-# OPTIONS -w #-} --- The above warning supression flag is a temporary kludge. --- While working on this module you are encouraged to remove it and fix --- any warnings in the module. See --- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings --- for details - module DsForeign ( dsForeigns ) where #include "HsVersions.h" @@ -25,17 +18,19 @@ import DsMonad import HsSyn import DataCon -import MachOp -import SMRep import CoreUtils import Id import Literal import Module import Name import Type +import TyCon import Coercion import TcType +import Var +import CmmExpr +import CmmUtils import HscTypes import ForeignCall import TysWiredIn @@ -76,27 +71,28 @@ dsForeigns [] dsForeigns fos = do fives <- mapM do_ldecl fos let - (hs, cs, hdrs, idss, bindss) = unzip5 fives + (hs, cs, idss, bindss) = unzip4 fives fe_ids = concat idss fe_init_code = map foreignExportInitialiser fe_ids -- return (ForeignStubs (vcat hs) - (vcat cs $$ vcat fe_init_code) - (nub (concat hdrs)), + (vcat cs $$ vcat fe_init_code), (concat bindss)) where do_ldecl (L loc decl) = putSrcSpanDs loc (do_decl decl) do_decl (ForeignImport id _ spec) = do traceIf (text "fi start" <+> ppr id) - (bs, h, c, mbhd) <- dsFImport (unLoc id) spec + (bs, h, c) <- dsFImport (unLoc id) spec traceIf (text "fi end" <+> ppr id) - return (h, c, maybeToList mbhd, [], bs) + return (h, c, [], bs) do_decl (ForeignExport (L _ id) _ (CExport (CExportStatic ext_nm cconv))) = do (h, c, _, _) <- dsFExport id (idType id) ext_nm cconv False - return (h, c, [], [id], []) + return (h, c, [id], []) + + do_decl d = pprPanic "dsForeigns/do_decl" (ppr d) \end{code} @@ -127,51 +123,58 @@ because it exposes the boxing to the call site. \begin{code} dsFImport :: Id -> ForeignImport - -> DsM ([Binding], SDoc, SDoc, Maybe FastString) -dsFImport id (CImport cconv safety header lib spec) = do - (ids, h, c) <- dsCImport id spec cconv safety no_hdrs - return (ids, h, c, if no_hdrs then Nothing else Just header) - where - no_hdrs = nullFS header + -> DsM ([Binding], SDoc, SDoc) +dsFImport id (CImport cconv safety _ _ spec) = do + (ids, h, c) <- dsCImport id spec cconv safety + return (ids, h, c) -- 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 id (DNImport spec) = do - (ids, h, c) <- dsFCall id (DNCall spec) True {- No headers -} - return (ids, h, c, Nothing) + (ids, h, c) <- dsFCall id (DNCall spec) + return (ids, h, c) dsCImport :: Id -> CImportSpec -> CCallConv -> Safety - -> Bool -- True <=> no headers in the f.i decl -> DsM ([Binding], SDoc, SDoc) -dsCImport id (CLabel cid) _ _ no_hdrs = do - (resTy, foRhs) <- resultWrapper (idType id) +dsCImport id (CLabel cid) cconv _ = do + let ty = idType id + fod = case splitTyConApp_maybe (repType ty) of + Just (tycon, _) + | tyConUnique tycon == funPtrTyConKey -> + IsFunction + _ -> IsData + (resTy, foRhs) <- resultWrapper ty ASSERT(fromJust resTy `coreEqType` addrPrimTy) -- typechecker ensures this - let rhs = foRhs (mkLit (MachLabel cid Nothing)) in - return ([(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 _ _ + let + rhs = foRhs (Lit (MachLabel cid stdcall_info fod)) + stdcall_info = fun_type_arg_stdcall_info cconv ty + in + return ([(id, rhs)], empty, empty) + +dsCImport id (CFunction target) cconv@PrimCallConv safety + = dsPrimCall id (CCall (CCallSpec target cconv safety)) +dsCImport id (CFunction target) cconv safety + = dsFCall id (CCall (CCallSpec target cconv safety)) +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 +-- For stdcall labels, if the type was a FunPtr or newtype thereof, +-- then we need to calculate the size of the arguments in order to add +-- the @n suffix to the label. +fun_type_arg_stdcall_info :: CCallConv -> Type -> Maybe Int +fun_type_arg_stdcall_info StdCallConv ty + | Just (tc,[arg_ty]) <- splitTyConApp_maybe (repType ty), + tyConUnique tc == funPtrTyConKey + = let + (_tvs,sans_foralls) = tcSplitForAllTys arg_ty + (fe_arg_tys, _orig_res_ty) = tcSplitFunTys sans_foralls + in Just $ sum (map (widthInBytes . typeWidth . typeCmmType . getPrimTyOf) fe_arg_tys) +fun_type_arg_stdcall_info _other_conv _ + = Nothing \end{code} @@ -182,7 +185,8 @@ setImpInline False id = id `setInlinePragma` NeverActive %************************************************************************ \begin{code} -dsFCall fn_id fcall no_hdrs = do +dsFCall :: Id -> ForeignCall -> DsM ([(Id, Expr TyVar)], SDoc, SDoc) +dsFCall fn_id fcall = do let ty = idType fn_id (tvs, fun_ty) = tcSplitForAllTys ty @@ -207,7 +211,6 @@ dsFCall fn_id fcall no_hdrs = do augmentResultDs | forDotnet = do - err_res <- newSysLocalDs addrPrimTy return (\ (mb_res_ty, resWrap) -> case mb_res_ty of Nothing -> (Just (mkTyConApp (tupleTyCon Unboxed 1) @@ -229,8 +232,7 @@ dsFCall fn_id fcall no_hdrs = do 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 = setImpInline no_hdrs $ -- See comments with setImpInline - mkSysLocal FSLIT("$wccall") work_uniq worker_ty + work_id = mkSysLocal (fsLit "$wccall") work_uniq worker_ty -- Build the wrapper work_app = mkApps (mkVarApps (Var work_id) tvs) val_args @@ -243,6 +245,39 @@ dsFCall fn_id fcall no_hdrs = do %************************************************************************ %* * +\subsection{Primitive calls} +%* * +%************************************************************************ + +This is for `@foreign import prim@' declarations. + +Currently, at the core level we pretend that these primitive calls are +foreign calls. It may make more sense in future to have them as a distinct +kind of Id, or perhaps to bundle them with PrimOps since semantically and +for calling convention they are really prim ops. + +\begin{code} +dsPrimCall :: Id -> ForeignCall -> DsM ([(Id, Expr TyVar)], SDoc, SDoc) +dsPrimCall fn_id fcall = do + let + ty = idType fn_id + (tvs, fun_ty) = tcSplitForAllTys ty + (arg_tys, io_res_ty) = tcSplitFunTys fun_ty + -- Must use tcSplit* functions because we want to + -- see that (IO t) in the corner + + args <- newSysLocalsDs arg_tys + + ccall_uniq <- newUnique + let + call_app = mkFCall ccall_uniq fcall (map Var args) io_res_ty + rhs = mkLams tvs (mkLams args call_app) + return ([(fn_id, rhs)], empty, empty) + +\end{code} + +%************************************************************************ +%* * \subsection{Foreign export} %* * %************************************************************************ @@ -254,7 +289,7 @@ The function that does most of the work for `@foreign export@' declarations. For each `@foreign export foo@' in a module M we generate: \begin{itemize} \item a C function `@foo@', which calls -\item a Haskell stub `@M.$ffoo@', which calls +\item a Haskell stub `@M.\$ffoo@', which calls \end{itemize} the user-written Haskell function `@M.foo@'. @@ -288,7 +323,7 @@ dsFExport fn_id ty ext_name cconv isDyn= do (res_ty, -- t is_IO_res_ty) <- -- Bool case tcSplitIOType_maybe orig_res_ty of - Just (ioTyCon, res_ty, co) -> return (res_ty, True) + Just (_ioTyCon, res_ty, _co) -> return (res_ty, True) -- The function already returns IO t -- ToDo: what about the coercion? Nothing -> return (orig_res_ty, False) @@ -360,12 +395,12 @@ dsFExportDynamic id cconv = do -} adj_args = [ mkIntLitInt (ccallConvToInt cconv) , Var stbl_value - , mkLit (MachLabel fe_nm mb_sz_args) - , mkLit (mkStringLit typestring) + , Lit (MachLabel fe_nm mb_sz_args IsFunction) + , Lit (mkMachString typestring) ] -- name of external entry point providing these services. -- (probably in the RTS.) - adjustor = FSLIT("createAdjustor") + adjustor = fsLit "createAdjustor" -- Determine the number of bytes of arguments to the stub function, -- so that we can attach the '@N' suffix to its label if it is a @@ -387,7 +422,7 @@ dsFExportDynamic id cconv = do , Lam stbl_value ccall_adj ] - fed = (id `setInlinePragma` NeverActive, io_app) + fed = (id `setInlineActivation` NeverActive, io_app) -- Never inline the f.e.d. function, because the litlit -- might not be in scope in other modules. @@ -429,24 +464,31 @@ mkFExportCBits :: FastString ) mkFExportCBits c_nm maybe_target arg_htys res_hty is_IO_res_ty cc = (header_bits, c_bits, type_string, - sum [ machRepByteWidth rep | (_,_,_,rep) <- aug_arg_info] -- all the args + sum [ widthInBytes (typeWidth rep) | (_,_,_,rep) <- aug_arg_info] -- all the args + -- NB. the calculation here isn't strictly speaking correct. + -- We have a primitive Haskell type (eg. Int#, Double#), and + -- we want to know the size, when passed on the C stack, of + -- the associated C type (eg. HsInt, HsDouble). We don't have + -- this information to hand, but we know what GHC's conventions + -- are for passing around the primitive Haskell types, so we + -- use that instead. I hope the two coincide --SDM ) where -- list the arguments to the C function arg_info :: [(SDoc, -- arg name SDoc, -- C type Type, -- Haskell type - MachRep)] -- the MachRep + CmmType)] -- the CmmType arg_info = [ let stg_type = showStgType ty in (arg_cname n stg_type, stg_type, ty, - typeMachRep (getPrimTyOf ty)) + typeCmmType (getPrimTyOf ty)) | (ty,n) <- zip arg_htys [1::Int ..] ] arg_cname n stg_ty | libffi = char '*' <> parens (stg_ty <> char '*') <> - ptext SLIT("args") <> brackets (int (n-1)) + ptext (sLit "args") <> brackets (int (n-1)) | otherwise = text ('a':show n) -- generate a libffi-style stub if this is a "wrapper" and libffi is enabled @@ -468,7 +510,7 @@ mkFExportCBits c_nm maybe_target arg_htys res_hty is_IO_res_ty cc stable_ptr_arg = (text "the_stableptr", text "StgStablePtr", undefined, - typeMachRep (mkStablePtrPrimTy alphaTy)) + typeCmmType (mkStablePtrPrimTy alphaTy)) -- stuff to do with the return type of the C function res_hty_is_unit = res_hty `coreEqType` unitTy -- Look through any newtypes @@ -480,17 +522,21 @@ mkFExportCBits c_nm maybe_target arg_htys res_hty is_IO_res_ty cc pprCconv = case cc of CCallConv -> empty StdCallConv -> text (ccallConvAttribute cc) + _ -> panic ("mkFExportCBits/pprCconv " ++ showPpr cc) + + header_bits = ptext (sLit "extern") <+> fun_proto <> semi - header_bits = ptext SLIT("extern") <+> fun_proto <> semi + fun_args + | null aug_arg_info = text "void" + | otherwise = hsep $ punctuate comma + $ map (\(nm,ty,_,_) -> ty <+> nm) aug_arg_info fun_proto | libffi - = ptext SLIT("void") <+> ftext c_nm <> - parens (ptext SLIT("void *cif STG_UNUSED, void* resp, void** args, void* the_stableptr")) + = ptext (sLit "void") <+> ftext c_nm <> + parens (ptext (sLit "void *cif STG_UNUSED, void* resp, void** args, void* the_stableptr")) | otherwise - = cResType <+> pprCconv <+> ftext c_nm <> - parens (hsep (punctuate comma (map (\(nm,ty,_,_) -> ty <+> nm) - aug_arg_info))) + = cResType <+> pprCconv <+> ftext c_nm <> parens fun_args -- the target which will form the root of what we ask rts_evalIO to run the_cfun @@ -531,33 +577,33 @@ mkFExportCBits c_nm maybe_target arg_htys res_hty is_IO_res_ty cc fun_proto $$ vcat [ lbrace - , ptext SLIT("Capability *cap;") + , ptext (sLit "Capability *cap;") , declareResult , declareCResult , text "cap = rts_lock();" -- create the application + perform it. - , ptext SLIT("cap=rts_evalIO") <> parens ( + , ptext (sLit "cap=rts_evalIO") <> parens ( cap <> - ptext SLIT("rts_apply") <> parens ( + ptext (sLit "rts_apply") <> parens ( cap <> text "(HaskellObj)" <> ptext (if is_IO_res_ty - then SLIT("runIO_closure") - else SLIT("runNonIO_closure")) + then (sLit "runIO_closure") + else (sLit "runNonIO_closure")) <> comma <> expr_to_run ) <+> comma <> text "&ret" ) <> semi - , ptext SLIT("rts_checkSchedStatus") <> parens (doubleQuotes (ftext c_nm) + , ptext (sLit "rts_checkSchedStatus") <> parens (doubleQuotes (ftext c_nm) <> comma <> text "cap") <> semi , assignCResult - , ptext SLIT("rts_unlock(cap);") + , ptext (sLit "rts_unlock(cap);") , if res_hty_is_unit then empty else if libffi then char '*' <> parens (cResType <> char '*') <> - ptext SLIT("resp = cret;") - else ptext SLIT("return cret;") + ptext (sLit "resp = cret;") + else ptext (sLit "return cret;") , rbrace ] @@ -582,15 +628,6 @@ foreignExportInitialiser hs_fn = ] --- NB. the calculation here isn't strictly speaking correct. --- We have a primitive Haskell type (eg. Int#, Double#), and --- we want to know the size, when passed on the C stack, of --- the associated C type (eg. HsInt, HsDouble). We don't have --- this information to hand, but we know what GHC's conventions --- are for passing around the primitive Haskell types, so we --- use that instead. I hope the two coincide --SDM -typeMachRep ty = argMachRep (typeCgRep ty) - mkHObj :: Type -> SDoc mkHObj t = text "rts_mk" <> text (showFFIType t) @@ -607,6 +644,8 @@ showFFIType t = getOccString (getName tc) Just (tc,_) -> tc Nothing -> pprPanic "showFFIType" (ppr t) +insertRetAddr :: CCallConv -> [(SDoc, SDoc, Type, CmmType)] + -> [(SDoc, SDoc, Type, CmmType)] #if !defined(x86_64_TARGET_ARCH) insertRetAddr CCallConv args = ret_addr_arg : args insertRetAddr _ args = args @@ -616,16 +655,19 @@ insertRetAddr _ args = args -- need to flush a register argument to the stack (See rts/Adjustor.c for -- details). insertRetAddr CCallConv args = go 0 args - where go 6 args = ret_addr_arg : args + where go :: Int -> [(SDoc, SDoc, Type, CmmType)] + -> [(SDoc, SDoc, Type, CmmType)] + go 6 args = ret_addr_arg : args go n (arg@(_,_,_,rep):args) - | I64 <- rep = arg : go (n+1) args + | cmmEqType_ignoring_ptrhood rep b64 = arg : go (n+1) args | otherwise = arg : go n args - go n [] = [] + go _ [] = [] insertRetAddr _ args = args #endif +ret_addr_arg :: (SDoc, SDoc, Type, CmmType) ret_addr_arg = (text "original_return_addr", text "void*", undefined, - typeMachRep addrPrimTy) + typeCmmType addrPrimTy) -- This function returns the primitive type associated with the boxed -- type argument to a foreign export (eg. Int ==> Int#). @@ -656,7 +698,7 @@ primTyDescChar ty WordRep -> unsigned_word Int64Rep -> 'L' Word64Rep -> 'l' - AddrRep -> unsigned_word + AddrRep -> 'p' FloatRep -> 'f' DoubleRep -> 'd' _ -> pprPanic "primTyDescChar" (ppr ty)