X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FcodeGen%2FCgForeignCall.hs;h=901dd96502e71f3c94f00272409dd54f19d3d154;hp=9db66f6a64aef2c8f2b86bf5498173e94251998e;hb=6e9c0431a7cf2bf1a48f01db48c6a1d41fe15a09;hpb=bb66ce578f2ef5cbeb35de9719f0839a32fbeb35 diff --git a/compiler/codeGen/CgForeignCall.hs b/compiler/codeGen/CgForeignCall.hs index 9db66f6..901dd96 100644 --- a/compiler/codeGen/CgForeignCall.hs +++ b/compiler/codeGen/CgForeignCall.hs @@ -17,8 +17,6 @@ module CgForeignCall ( emitOpenNursery, ) where -#include "HsVersions.h" - import StgSyn import CgProf import CgBindery @@ -29,13 +27,15 @@ import TysPrim import CLabel import Cmm import CmmUtils -import MachOp import SMRep import ForeignCall import ClosureInfo import Constants import StaticFlags import Outputable +import Module +import FastString +import BasicTypes import Control.Monad @@ -43,7 +43,7 @@ import Control.Monad -- Code generation for Foreign Calls cgForeignCall - :: CmmHintFormals -- where to put the results + :: HintedCmmFormals -- where to put the results -> ForeignCall -- the op -> [StgArg] -- arguments -> StgLiveVars -- live vars, in case we need to save them @@ -57,15 +57,16 @@ cgForeignCall results fcall stg_args live | (stg_arg, (rep,expr)) <- stg_args `zip` reps_n_amodes, nonVoidArg rep] - arg_hints = zip arg_exprs (map (typeHint.stgArgType) stg_args) + arg_hints = zipWith CmmHinted + arg_exprs (map (typeForeignHint.stgArgType) stg_args) -- in emitForeignCall results fcall arg_hints live emitForeignCall - :: CmmHintFormals -- where to put the results + :: HintedCmmFormals -- where to put the results -> ForeignCall -- the op - -> [(CmmExpr,MachHint)] -- arguments + -> [CmmHinted CmmExpr] -- arguments -> StgLiveVars -- live vars, in case we need to save them -> Code @@ -77,36 +78,47 @@ emitForeignCall results (CCall (CCallSpec target cconv safety)) args live where (call_args, cmm_target) = case target of - StaticTarget lbl -> (args, CmmLit (CmmLabel - (mkForeignLabel lbl call_size False))) - DynamicTarget -> case args of (fn,_):rest -> (rest, fn) + -- If the packageId is Nothing then the label is taken to be in the + -- package currently being compiled. + StaticTarget lbl mPkgId + -> let labelSource + = case mPkgId of + Nothing -> ForeignLabelInThisPackage + Just pkgId -> ForeignLabelInPackage pkgId + in ( args + , CmmLit (CmmLabel + (mkForeignLabel lbl call_size labelSource IsFunction))) + + -- A label imported with "foreign import ccall "dynamic" ..." + -- Note: "dynamic" here doesn't mean "dynamic library". + -- Read the FFI spec for details. + DynamicTarget -> case args of + (CmmHinted fn _):rest -> (rest, fn) + [] -> panic "emitForeignCall: DynamicTarget []" -- in the stdcall calling convention, the symbol needs @size appended -- to it, where size is the total number of bytes of arguments. We -- attach this info to the CLabel here, and the CLabel pretty printer -- will generate the suffix when the label is printed. call_size - | StdCallConv <- cconv = Just (sum (map (arg_size.cmmExprRep.fst) args)) + | StdCallConv <- cconv = Just (sum (map (arg_size.cmmExprType.hintlessCmm) args)) | otherwise = Nothing -- ToDo: this might not be correct for 64-bit API - arg_size rep = max (machRepByteWidth rep) wORD_SIZE - -emitForeignCall _ (DNCall _) _ _ - = panic "emitForeignCall: DNCall" + arg_size rep = max (widthInBytes (typeWidth rep)) wORD_SIZE -- alternative entry point, used by CmmParse emitForeignCall' :: Safety - -> CmmHintFormals -- where to put the results + -> HintedCmmFormals -- where to put the results -> CmmCallTarget -- the op - -> [(CmmExpr,MachHint)] -- arguments + -> [CmmHinted CmmExpr] -- arguments -> Maybe [GlobalReg] -- live vars, in case we need to save them -> C_SRT -- the SRT of the calls continuation -> CmmReturnInfo -> Code -emitForeignCall' safety results target args vols srt ret +emitForeignCall' safety results target args vols _srt ret | not (playSafe safety) = do temp_args <- load_args_into_temps args let (caller_save, caller_load) = callerSaveVolatileRegs vols @@ -115,10 +127,10 @@ emitForeignCall' safety results target args vols srt ret stmtsC caller_load | otherwise = do - -- Both 'id' and 'new_base' are KindNonPtr because they're + -- Both 'id' and 'new_base' are GCKindNonPtr because they're -- RTS only objects and are not subject to garbage collection - id <- newNonPtrTemp wordRep - new_base <- newNonPtrTemp (cmmRegRep (CmmGlobal BaseReg)) + id <- newTemp bWord + new_base <- newTemp (cmmRegType (CmmGlobal BaseReg)) temp_args <- load_args_into_temps args temp_target <- load_target_into_temp target let (caller_save, caller_load) = callerSaveVolatileRegs vols @@ -127,16 +139,16 @@ emitForeignCall' safety results target args vols srt ret -- The CmmUnsafe arguments are only correct because this part -- of the code hasn't been moved into the CPS pass yet. -- Once that happens, this function will just emit a (CmmSafe srt) call, - -- and the CPS will will be the one to convert that + -- and the CPS will be the one to convert that -- to this sequence of three CmmUnsafe calls. stmtC (CmmCall (CmmCallee suspendThread CCallConv) - [ (id,PtrHint) ] - [ (CmmReg (CmmGlobal BaseReg), PtrHint) ] + [ CmmHinted id AddrHint ] + [ CmmHinted (CmmReg (CmmGlobal BaseReg)) AddrHint ] CmmUnsafe ret) stmtC (CmmCall temp_target results temp_args CmmUnsafe ret) stmtC (CmmCall (CmmCallee resumeThread CCallConv) - [ (new_base, PtrHint) ] - [ (CmmReg (CmmLocal id), PtrHint) ] + [ CmmHinted new_base AddrHint ] + [ CmmHinted (CmmReg (CmmLocal id)) AddrHint ] CmmUnsafe ret) -- Assign the result to BaseReg: we -- might now have a different Capability! @@ -144,8 +156,9 @@ emitForeignCall' safety results target args vols srt ret stmtsC caller_load emitLoadThreadState -suspendThread = CmmLit (CmmLabel (mkRtsCodeLabel SLIT("suspendThread"))) -resumeThread = CmmLit (CmmLabel (mkRtsCodeLabel SLIT("resumeThread"))) +suspendThread, resumeThread :: CmmExpr +suspendThread = CmmLit (CmmLabel (mkCmmCodeLabel rtsPackageId (fsLit "suspendThread"))) +resumeThread = CmmLit (CmmLabel (mkCmmCodeLabel rtsPackageId (fsLit "resumeThread"))) -- we might need to load arguments into temporaries before @@ -155,24 +168,27 @@ resumeThread = CmmLit (CmmLabel (mkRtsCodeLabel SLIT("resumeThread"))) -- -- This is a HACK; really it should be done in the back end, but -- it's easier to generate the temporaries here. +load_args_into_temps :: [CmmHinted CmmExpr] -> FCode [CmmHinted CmmExpr] load_args_into_temps = mapM arg_assign_temp - where arg_assign_temp (e,hint) = do + where arg_assign_temp (CmmHinted e hint) = do tmp <- maybe_assign_temp e - return (tmp,hint) + return (CmmHinted tmp hint) +load_target_into_temp :: CmmCallTarget -> FCode CmmCallTarget load_target_into_temp (CmmCallee expr conv) = do tmp <- maybe_assign_temp expr return (CmmCallee tmp conv) load_target_into_temp other_target = return other_target +maybe_assign_temp :: CmmExpr -> FCode CmmExpr maybe_assign_temp e | hasNoGlobalRegs e = return e | otherwise = do -- don't use assignTemp, it uses its own notion of "trivial" -- expressions, which are wrong here. -- this is a NonPtr because it only duplicates an existing - reg <- newNonPtrTemp (cmmExprRep e) --TODO FIXME NOW + reg <- newTemp (cmmExprType e) --TODO FIXME NOW stmtC (CmmAssign (CmmLocal reg) e) return (CmmReg (CmmLocal reg)) @@ -182,6 +198,7 @@ maybe_assign_temp e -- This stuff can't be done in suspendThread/resumeThread, because it -- refers to global registers which aren't available in the C world. +emitSaveThreadState :: Code emitSaveThreadState = do -- CurrentTSO->sp = Sp; stmtC $ CmmStore (cmmOffset stgCurrentTSO tso_SP) stgSp @@ -191,39 +208,46 @@ emitSaveThreadState = do stmtC (CmmStore (cmmOffset stgCurrentTSO tso_CCCS) curCCS) -- CurrentNursery->free = Hp+1; +emitCloseNursery :: Code emitCloseNursery = stmtC $ CmmStore nursery_bdescr_free (cmmOffsetW stgHp 1) +emitLoadThreadState :: Code emitLoadThreadState = do - tso <- newNonPtrTemp wordRep -- TODO FIXME NOW + tso <- newTemp bWord -- TODO FIXME NOW stmtsC [ -- tso = CurrentTSO; CmmAssign (CmmLocal tso) stgCurrentTSO, -- Sp = tso->sp; CmmAssign sp (CmmLoad (cmmOffset (CmmReg (CmmLocal tso)) tso_SP) - wordRep), + bWord), -- SpLim = tso->stack + RESERVED_STACK_WORDS; CmmAssign spLim (cmmOffsetW (cmmOffset (CmmReg (CmmLocal tso)) tso_STACK) - rESERVED_STACK_WORDS) + rESERVED_STACK_WORDS), + -- HpAlloc = 0; + -- HpAlloc is assumed to be set to non-zero only by a failed + -- a heap check, see HeapStackCheck.cmm:GC_GENERIC + CmmAssign hpAlloc (CmmLit zeroCLit) ] emitOpenNursery -- and load the current cost centre stack from the TSO when profiling: when opt_SccProfilingOn $ stmtC (CmmStore curCCSAddr - (CmmLoad (cmmOffset (CmmReg (CmmLocal tso)) tso_CCCS) wordRep)) + (CmmLoad (cmmOffset (CmmReg (CmmLocal tso)) tso_CCCS) bWord)) +emitOpenNursery :: Code emitOpenNursery = stmtsC [ -- Hp = CurrentNursery->free - 1; - CmmAssign hp (cmmOffsetW (CmmLoad nursery_bdescr_free wordRep) (-1)), + CmmAssign hp (cmmOffsetW (CmmLoad nursery_bdescr_free gcWord) (-1)), -- HpLim = CurrentNursery->start + -- CurrentNursery->blocks*BLOCK_SIZE_W - 1; CmmAssign hpLim (cmmOffsetExpr - (CmmLoad nursery_bdescr_start wordRep) + (CmmLoad nursery_bdescr_start bWord) (cmmOffset (CmmMachOp mo_wordMul [ - CmmMachOp (MO_S_Conv I32 wordRep) - [CmmLoad nursery_bdescr_blocks I32], + CmmMachOp (MO_SS_Conv W32 wordWidth) + [CmmLoad nursery_bdescr_blocks b32], CmmLit (mkIntCLit bLOCK_SIZE) ]) (-1) @@ -231,11 +255,12 @@ emitOpenNursery = stmtsC [ ) ] - +nursery_bdescr_free, nursery_bdescr_start, nursery_bdescr_blocks :: CmmExpr nursery_bdescr_free = cmmOffset stgCurrentNursery oFFSET_bdescr_free nursery_bdescr_start = cmmOffset stgCurrentNursery oFFSET_bdescr_start nursery_bdescr_blocks = cmmOffset stgCurrentNursery oFFSET_bdescr_blocks +tso_SP, tso_STACK, tso_CCCS :: ByteOff tso_SP = tsoFieldB oFFSET_StgTSO_sp tso_STACK = tsoFieldB oFFSET_StgTSO_stack tso_CCCS = tsoProfFieldB oFFSET_StgTSO_CCCS @@ -250,17 +275,20 @@ tsoFieldB off tsoProfFieldB :: ByteOff -> ByteOff tsoProfFieldB off = off + fixedHdrSize * wORD_SIZE +stgSp, stgHp, stgCurrentTSO, stgCurrentNursery :: CmmExpr stgSp = CmmReg sp stgHp = CmmReg hp stgCurrentTSO = CmmReg currentTSO stgCurrentNursery = CmmReg currentNursery +sp, spLim, hp, hpLim, currentTSO, currentNursery, hpAlloc :: CmmReg sp = CmmGlobal Sp spLim = CmmGlobal SpLim hp = CmmGlobal Hp hpLim = CmmGlobal HpLim currentTSO = CmmGlobal CurrentTSO currentNursery = CmmGlobal CurrentNursery +hpAlloc = CmmGlobal HpAlloc -- ----------------------------------------------------------------------------- -- For certain types passed to foreign calls, we adjust the actual