import RnHsSyn ( RenamedHsDecl, RenamedForeignDecl )
import TcMonad
-import TcEnv ( newLocalId )
-import TcMonoType ( tcHsLiftedSigType )
-import TcHsSyn ( TcMonoBinds, TypecheckedForeignDecl,
- TcForeignExportDecl )
-import TcExpr ( tcPolyExpr )
+import TcEnv ( newLocalName )
+import TcMonoType ( tcHsSigType, UserTypeCtxt(..) )
+import TcHsSyn ( TcMonoBinds, TypecheckedForeignDecl, TcForeignExportDecl )
+import TcExpr ( tcExpr )
import Inst ( emptyLIE, LIE, plusLIE )
import ErrUtils ( Message )
import Id ( Id, mkLocalId )
import Name ( nameOccName )
-import TysWiredIn ( isFFIArgumentTy, isFFIImportResultTy,
- isFFIExportResultTy,
- isFFIExternalTy, isFFIDynArgumentTy, isFFIDynResultTy,
- isFFILabelTy
+import PrimRep ( getPrimRepSize, isFloatingRep )
+import Type ( typePrimRep )
+import TcType ( Type, tcSplitFunTys, tcSplitTyConApp_maybe, tcSplitForAllTys,
+ isFFIArgumentTy, isFFIImportResultTy,
+ isFFIExportResultTy, isFFILabelTy,
+ isFFIExternalTy, isFFIDynArgumentTy, isFFIDynResultTy
)
-import TcType ( Type, tcSplitFunTys, tcSplitTyConApp_maybe, tcSplitForAllTys )
import ForeignCall ( CCallSpec(..), CExportSpec(..), CCallTarget(..), isDynamicTarget, isCasmTarget )
import CStrings ( CLabelString, isCLabelString )
import PrelNames ( hasKey, ioTyConKey )
tcFImport fo@(ForeignImport nm hs_ty imp_decl src_loc)
= tcAddSrcLoc src_loc $
tcAddErrCtxt (foreignDeclCtxt fo) $
- tcHsLiftedSigType hs_ty `thenTc` \ sig_ty ->
+ tcHsSigType (ForSigCtxt nm) hs_ty `thenTc` \ sig_ty ->
let
-- drop the foralls before inspecting the structure
-- of the foreign type.
case arg_tys of
[arg1_ty] -> checkForeignArgs isFFIExternalTy arg1_tys `thenNF_Tc_`
checkForeignRes nonIOok isFFIExportResultTy res1_ty `thenNF_Tc_`
- checkForeignRes mustBeIO isFFIDynResultTy res_ty
+ checkForeignRes mustBeIO isFFIDynResultTy res_ty `thenNF_Tc_`
+ checkFEDArgs arg1_tys
where
(arg1_tys, res1_ty) = tcSplitFunTys arg1_ty
other -> addErrTc (illegalForeignTyErr empty sig_ty)
tcCheckFIType sig_ty arg_tys res_ty (CImport (CCallSpec target _ safety))
| isDynamicTarget target -- Foreign import dynamic
- = checkCg checkCOrAsm `thenNF_Tc_`
+ = checkCg checkCOrAsmOrInterp `thenNF_Tc_`
case arg_tys of -- The first arg must be Addr
[] -> check False (illegalForeignTyErr empty sig_ty)
(arg1_ty:arg_tys) -> getDOptsTc `thenNF_Tc` \ dflags ->
| otherwise -- Normal foreign import
= checkCg (if isCasmTarget target
- then checkC else checkCOrAsmOrDotNet) `thenNF_Tc_`
+ then checkC else checkCOrAsmOrDotNetOrInterp) `thenNF_Tc_`
checkCTarget target `thenNF_Tc_`
getDOptsTc `thenNF_Tc` \ dflags ->
checkForeignArgs (isFFIArgumentTy dflags safety) arg_tys `thenNF_Tc_`
-- This makes a convenient place to check
-- that the C identifier is valid for C
checkCTarget (StaticTarget str)
- = checkCg checkCOrAsmOrDotNet `thenNF_Tc_`
+ = checkCg checkCOrAsmOrDotNetOrInterp `thenNF_Tc_`
check (isCLabelString str) (badCName str)
checkCTarget (CasmTarget _)
= checkCg checkC
\end{code}
+On a SPARC, with foreign export dynamic, due to a giant hack when building
+adjustor thunks, we only allow 16 bytes of arguments!
+
+So for example, args (Int,Double,Int) would be OK (1+2+1)
+as would (Int,Int,Int,Int) (1+1+1+1) but not (Int,Double,Double) (1+2+2).
+
+On an Alpha, due to a similar hack, we only allow 4 integer arguments with
+foreign export dynamic (i.e., 32 bytes of arguments after padding each
+argument to a quadword, excluding floating-point arguments).
+
+The check is needed for both via-C and native-code routes
+
+\begin{code}
+#include "nativeGen/NCG.h"
+#if sparc_TARGET_ARCH
+checkFEDArgs arg_tys
+ = check (words_of_args <= 4) err
+ where
+ words_of_args = sum (map (getPrimRepSize . typePrimRep) arg_tys)
+ err = ptext SLIT("On SPARC, I can only handle 4 words of arguments to foreign export dynamic")
+#else
+#if alpha_TARGET_ARCH
+checkFEDArgs arg_tys
+ = check (integral_args <= 4) err
+ where
+ integral_args = sum (map getPrimRepSize $
+ filter (not . isFloatingRep) $
+ map typePrimRep arg_tys)
+ err = ptext SLIT("On Alpha, I can only handle 4 non-floating-point arguments to foreign export dynamic")
+#else
+checkFEDArgs arg_tys = returnNF_Tc ()
+#endif
+#endif
+\end{code}
+
%************************************************************************
%* *
tcAddSrcLoc src_loc $
tcAddErrCtxt (foreignDeclCtxt fo) $
- tcHsLiftedSigType hs_ty `thenTc` \ sig_ty ->
- tcPolyExpr (HsVar nm) sig_ty `thenTc` \ (rhs, lie, _, _, _) ->
+ tcHsSigType (ForSigCtxt nm) hs_ty `thenTc` \ sig_ty ->
+ tcExpr (HsVar nm) sig_ty `thenTc` \ (rhs, lie) ->
tcCheckFEType sig_ty spec `thenTc_`
-- than its declared/inferred type. Hence the need
-- to create a local binding which will call the exported function
-- at a particular type (and, maybe, overloading).
- newLocalId (nameOccName nm) sig_ty src_loc `thenNF_Tc` \ id ->
+ newLocalName nm `thenNF_Tc` \ id_name ->
let
- bind = VarMonoBind id rhs
+ id = mkLocalId id_name sig_ty
+ bind = VarMonoBind id rhs
in
returnTc (lie, bind, ForeignExport id undefined spec src_loc)
\end{code}
checkCOrAsm HscC = Nothing
checkCOrAsm HscAsm = Nothing
-checkCOrAsm other = Just (text "via-C or native code generation (-fvia-C)")
+checkCOrAsm other
+ = Just (text "requires via-C or native code generation (-fvia-C)")
+
+checkCOrAsmOrInterp HscC = Nothing
+checkCOrAsmOrInterp HscAsm = Nothing
+checkCOrAsmOrInterp HscInterpreted = Nothing
+checkCOrAsmOrInterp other
+ = Just (text "requires interpreted, C or native code generation")
checkCOrAsmOrDotNet HscC = Nothing
checkCOrAsmOrDotNet HscAsm = Nothing
checkCOrAsmOrDotNet HscILX = Nothing
-checkCOrAsmOrDotNet other = Just (text "requires C, native or .NET ILX code generation")
+checkCOrAsmOrDotNet other
+ = Just (text "requires C, native or .NET ILX code generation")
+
+checkCOrAsmOrDotNetOrInterp HscC = Nothing
+checkCOrAsmOrDotNetOrInterp HscAsm = Nothing
+checkCOrAsmOrDotNetOrInterp HscILX = Nothing
+checkCOrAsmOrDotNetOrInterp HscInterpreted = Nothing
+checkCOrAsmOrDotNetOrInterp other
+ = Just (text "requires interpreted, C, native or .NET ILX code generation")
checkCg check
= getDOptsTc `thenNF_Tc` \ dflags ->
- case check (dopt_HscLang dflags) of
- Nothing -> returnNF_Tc ()
- Just err -> addErrTc (text "Illegal foreign declaration:" <+> err)
+ let hscLang = dopt_HscLang dflags in
+ case hscLang of
+ HscNothing -> returnNF_Tc ()
+ otherwise ->
+ case check hscLang of
+ Nothing -> returnNF_Tc ()
+ Just err -> addErrTc (text "Illegal foreign declaration:" <+> err)
\end{code}
Warnings
check _ the_err = addErrTc the_err
illegalForeignTyErr arg_or_res ty
- = hang (hsep [ptext SLIT("Unacceptable"), arg_or_res, ptext SLIT("type in foreign declaration:")])
+ = hang (hsep [ptext SLIT("Unacceptable"), arg_or_res,
+ ptext SLIT("type in foreign declaration:")])
4 (hsep [ppr ty])
-- Used for 'arg_or_res' argument to illegalForeignTyErr
result = text "result"
badCName :: CLabelString -> Message
-badCName target = sep [quotes (ppr target) <+> ptext SLIT("is not a valid C identifier")]
+badCName target
+ = sep [quotes (ppr target) <+> ptext SLIT("is not a valid C identifier")]
foreignDeclCtxt fo
= hang (ptext SLIT("When checking declaration:"))
- 4 (ppr fo)
+ 4 (ppr fo)
\end{code}
+
projects / ghc-hetmet.git / blobdiff