\section[ByteCodeLink]{Bytecode assembler and linker}
\begin{code}
+
+{-# OPTIONS -optc-DNON_POSIX_SOURCE #-}
+
module ByteCodeLink ( UnlinkedBCO, UnlinkedBCOExpr, assembleBCO,
- ClosureEnv, HValue, linkSomeBCOs, filterNameMap
+ ClosureEnv, HValue, filterNameMap,
+ linkIModules, linkIExpr, linkFail,
+ iNTERP_STACK_CHECK_THRESH
) where
#include "HsVersions.h"
import Outputable
-import Name ( Name, getName, nameModule, toRdrName )
+import Name ( Name, getName, nameModule, toRdrName, isExternalName )
import RdrName ( rdrNameOcc, rdrNameModule )
-import OccName ( occNameString, occNameUserString )
+import OccName ( occNameString )
import FiniteMap ( FiniteMap, addListToFM, filterFM,
addToFM, lookupFM, emptyFM )
import CoreSyn
import Literal ( Literal(..) )
import PrimOp ( PrimOp, primOpOcc )
import PrimRep ( PrimRep(..) )
-import Util ( global )
import Constants ( wORD_SIZE )
import Module ( ModuleName, moduleName, moduleNameFS )
import Linker ( lookupSymbol )
-import FastString ( FastString(..) )
+import FastString ( FastString(..), unpackFS )
import ByteCodeInstr ( BCInstr(..), ProtoBCO(..) )
import ByteCodeItbls ( ItblEnv, ItblPtr )
-
-
-import Monad ( foldM )
-import ST ( runST )
-import MArray ( castSTUArray,
- newFloatArray, writeFloatArray,
- newDoubleArray, writeDoubleArray,
- newIntArray, writeIntArray,
- newAddrArray, writeAddrArray )
-import Foreign ( Word16, Ptr(..) )
-import Addr ( Word, Addr )
-
-import PrelBase ( Int(..) )
-import PrelGHC ( BCO#, newBCO#, unsafeCoerce#,
+import FiniteMap
+import Panic ( GhcException(..) )
+import Util ( notNull )
+
+import Control.Monad ( when, foldM )
+import Control.Monad.ST ( runST )
+import Data.Array.IArray ( array )
+
+import GHC.Word ( Word(..) )
+import Data.Array.MArray ( MArray, newArray_, readArray, writeArray )
+import Data.Array.ST ( castSTUArray )
+import Data.Array.Base ( UArray(..) )
+import Foreign.Ptr ( nullPtr )
+import Foreign ( Word16, free )
+import System.Mem.Weak ( addFinalizer )
+import Data.Int ( Int64 )
+
+import System.IO ( fixIO )
+import Control.Exception ( throwDyn )
+
+import GlaExts ( BCO#, newBCO#, unsafeCoerce#,
ByteArray#, Array#, addrToHValue#, mkApUpd0# )
-import IOExts ( IORef, fixIO, readIORef, writeIORef )
-import ArrayBase
+
+#if __GLASGOW_HASKELL__ >= 503
+import GHC.Arr ( Array(..) )
+import GHC.IOBase ( IO(..) )
+import GHC.Ptr ( Ptr(..) )
+#else
import PrelArr ( Array(..) )
import PrelIOBase ( IO(..) )
-
+import Ptr ( Ptr(..) )
+#endif
\end{code}
%************************************************************************
%************************************************************************
\begin{code}
+-- Linking stuff
+linkIModules :: ItblEnv -- incoming global itbl env; returned updated
+ -> ClosureEnv -- incoming global closure env; returned updated
+ -> [([UnlinkedBCO], ItblEnv)]
+ -> IO ([HValue], ItblEnv, ClosureEnv)
+linkIModules gie gce mods
+ = do let (bcoss, ies) = unzip mods
+ bcos = concat bcoss
+ final_gie = foldr plusFM gie ies
+ (final_gce, linked_bcos) <- linkSomeBCOs True final_gie gce bcos
+ return (linked_bcos, final_gie, final_gce)
+
+
+linkIExpr :: ItblEnv -> ClosureEnv -> UnlinkedBCOExpr
+ -> IO HValue -- IO BCO# really
+linkIExpr ie ce (root_ul_bco, aux_ul_bcos)
+ = do (aux_ce, _) <- linkSomeBCOs False ie ce aux_ul_bcos
+ (_, [root_bco]) <- linkSomeBCOs False ie aux_ce [root_ul_bco]
+ return root_bco
-- Link a bunch of BCOs and return them + updated closure env.
-linkSomeBCOs :: ItblEnv -> ClosureEnv -> [UnlinkedBCO]
- -> IO (ClosureEnv, [HValue])
-linkSomeBCOs ie ce_in ul_bcos
+linkSomeBCOs :: Bool -- False <=> add _all_ BCOs to returned closure env
+ -- True <=> add only toplevel BCOs to closure env
+ -> ItblEnv
+ -> ClosureEnv
+ -> [UnlinkedBCO]
+ -> IO (ClosureEnv, [HValue])
+linkSomeBCOs toplevs_only ie ce_in ul_bcos
= do let nms = map nameOfUnlinkedBCO ul_bcos
hvals <- fixIO
( \ hvs -> let ce_out = addListToFM ce_in (zipLazily nms hvs)
in mapM (linkBCO ie ce_out) ul_bcos )
- let ce_out = addListToFM ce_in (zip nms hvals)
+
+ let ce_all_additions = zip nms hvals
+ ce_top_additions = filter (isExternalName.fst) ce_all_additions
+ ce_additions = if toplevs_only then ce_top_additions
+ else ce_all_additions
+ ce_out = -- make sure we're not inserting duplicate names into the
+ -- closure environment, which leads to trouble.
+ ASSERT (all (not . (`elemFM` ce_in)) (map fst ce_additions))
+ addListToFM ce_in ce_additions
return (ce_out, hvals)
where
-- A lazier zip, in which no demand is propagated to the second
data UnlinkedBCO
= UnlinkedBCO Name
(SizedSeq Word16) -- insns
- (SizedSeq Word) -- literals
+ (SizedSeq (Either Word FastString)) -- literals
+ -- Either literal words or a pointer to a asciiz
+ -- string, denoting a label whose *address* should
+ -- be determined at link time
(SizedSeq (Either Name PrimOp)) -- ptrs
(SizedSeq Name) -- itbl refs
type ClosureEnv = FiniteMap Name HValue
data HValue = HValue -- dummy type, actually a pointer to some Real Code.
--- remove all entries for a given set of modules from the environment
+-- remove all entries for a given set of modules from the environment;
+-- note that this removes all local names too (ie. temporary bindings from
+-- the command line).
filterNameMap :: [ModuleName] -> FiniteMap Name a -> FiniteMap Name a
filterNameMap mods env
- = filterFM (\n _ -> moduleName (nameModule n) `notElem` mods) env
-
+ = filterFM (\n _ -> isExternalName n
+ && moduleName (nameModule n) `elem` mods) env
\end{code}
%************************************************************************
-- Top level assembler fn.
assembleBCO :: ProtoBCO Name -> IO UnlinkedBCO
-assembleBCO (ProtoBCO nm instrs origin)
+assembleBCO (ProtoBCO nm instrs origin malloced)
= let
-- pass 1: collect up the offsets of the local labels.
-- Remember that the first insn starts at offset 1 since offset 0
in
do -- pass 2: generate the instruction, ptr and nonptr bits
insns <- return emptySS :: IO (SizedSeq Word16)
- lits <- return emptySS :: IO (SizedSeq Word)
+ lits <- return emptySS :: IO (SizedSeq (Either Word FastString))
ptrs <- return emptySS :: IO (SizedSeq (Either Name PrimOp))
itbls <- return emptySS :: IO (SizedSeq Name)
let init_asm_state = (insns,lits,ptrs,itbls)
(final_insns, final_lits, final_ptrs, final_itbls)
- <- mkBits findLabel init_asm_state instrs
+ <- mkBits findLabel init_asm_state instrs
- return (UnlinkedBCO nm final_insns final_lits final_ptrs final_itbls)
+ let ul_bco = UnlinkedBCO nm final_insns final_lits final_ptrs final_itbls
+
+ -- 8 Aug 01: Finalisers aren't safe when attached to non-primitive
+ -- objects, since they might get run too early. Disable this until
+ -- we figure out what to do.
+ -- when (notNull malloced) (addFinalizer ul_bco (mapM_ zonk malloced))
+
+ return ul_bco
+ where
+ zonk ptr = do -- putStrLn ("freeing malloc'd block at " ++ show (A# a#))
+ free ptr
-- instrs nonptrs ptrs itbls
-type AsmState = (SizedSeq Word16, SizedSeq Word,
- SizedSeq (Either Name PrimOp), SizedSeq Name)
+type AsmState = (SizedSeq Word16,
+ SizedSeq (Either Word FastString),
+ SizedSeq (Either Name PrimOp),
+ SizedSeq Name)
data SizedSeq a = SizedSeq !Int [a]
emptySS = SizedSeq 0 []
doInstr :: AsmState -> BCInstr -> IO AsmState
doInstr st i
= case i of
+ SWIZZLE stkoff n -> instr3 st i_SWIZZLE stkoff n
ARGCHECK n -> instr2 st i_ARGCHECK n
+ STKCHECK n -> instr2 st i_STKCHECK n
PUSH_L o1 -> instr2 st i_PUSH_L o1
PUSH_LL o1 o2 -> instr3 st i_PUSH_LL o1 o2
PUSH_LLL o1 o2 o3 -> instr4 st i_PUSH_LLL o1 o2 o3
PUSH_AS nm pk -> do (p, st2) <- ptr st (Left nm)
(np, st3) <- ctoi_itbl st2 pk
instr3 st3 i_PUSH_AS p np
- PUSH_UBX lit nws -> do (np, st2) <- literal st lit
+ PUSH_UBX (Left lit) nws
+ -> do (np, st2) <- literal st lit
+ instr3 st2 i_PUSH_UBX np nws
+ PUSH_UBX (Right aa) nws
+ -> do (np, st2) <- addr st aa
instr3 st2 i_PUSH_UBX np nws
+
PUSH_TAG tag -> instr2 st i_PUSH_TAG tag
SLIDE n by -> instr3 st i_SLIDE n by
ALLOC n -> instr2 st i_ALLOC n
TESTLT_P i l -> instr3 st i_TESTLT_P i (findLabel l)
TESTEQ_P i l -> instr3 st i_TESTEQ_P i (findLabel l)
CASEFAIL -> instr1 st i_CASEFAIL
+ JMP l -> instr2 st i_JMP (findLabel l)
ENTER -> instr1 st i_ENTER
- RETURN rep -> do (itbl_no,st2) <- itoc_itbl st rep
+ RETURN rep -> do (itbl_no,st2) <- itoc_itbl st rep
instr2 st2 i_RETURN itbl_no
+ CCALL m_addr -> do (np, st2) <- addr st m_addr
+ instr2 st2 i_CCALL np
i2s :: Int -> Word16
i2s = fromIntegral
float (st_i0,st_l0,st_p0,st_I0) f
= do let ws = mkLitF f
- st_l1 <- addListToSS st_l0 ws
+ st_l1 <- addListToSS st_l0 (map Left ws)
return (sizeSS st_l0, (st_i0,st_l1,st_p0,st_I0))
double (st_i0,st_l0,st_p0,st_I0) d
= do let ws = mkLitD d
- st_l1 <- addListToSS st_l0 ws
+ st_l1 <- addListToSS st_l0 (map Left ws)
return (sizeSS st_l0, (st_i0,st_l1,st_p0,st_I0))
int (st_i0,st_l0,st_p0,st_I0) i
= do let ws = mkLitI i
- st_l1 <- addListToSS st_l0 ws
+ st_l1 <- addListToSS st_l0 (map Left ws)
+ return (sizeSS st_l0, (st_i0,st_l1,st_p0,st_I0))
+
+ int64 (st_i0,st_l0,st_p0,st_I0) i
+ = do let ws = mkLitI64 i
+ st_l1 <- addListToSS st_l0 (map Left ws)
return (sizeSS st_l0, (st_i0,st_l1,st_p0,st_I0))
addr (st_i0,st_l0,st_p0,st_I0) a
- = do let ws = mkLitA a
- st_l1 <- addListToSS st_l0 ws
+ = do let ws = mkLitPtr a
+ st_l1 <- addListToSS st_l0 (map Left ws)
+ return (sizeSS st_l0, (st_i0,st_l1,st_p0,st_I0))
+
+ litlabel (st_i0,st_l0,st_p0,st_I0) fs
+ = do st_l1 <- addListToSS st_l0 [Right fs]
return (sizeSS st_l0, (st_i0,st_l1,st_p0,st_I0))
ptr (st_i0,st_l0,st_p0,st_I0) p
= do st_I1 <- addToSS st_I0 (getName dcon)
return (sizeSS st_I0, (st_i0,st_l0,st_p0,st_I1))
- literal st (MachInt j) = int st (fromIntegral j)
- literal st (MachFloat r) = float st (fromRational r)
- literal st (MachDouble r) = double st (fromRational r)
- literal st (MachChar c) = int st c
+ literal st (MachLabel fs) = litlabel st fs
+ literal st (MachWord w) = int st (fromIntegral w)
+ literal st (MachInt j) = int st (fromIntegral j)
+ literal st (MachFloat r) = float st (fromRational r)
+ literal st (MachDouble r) = double st (fromRational r)
+ literal st (MachChar c) = int st c
+ literal st (MachInt64 ii) = int64 st (fromIntegral ii)
+ literal st (MachWord64 ii) = int64 st (fromIntegral ii)
+ literal st other = pprPanic "ByteCodeLink.literal" (ppr other)
ctoi_itbl st pk
= addr st ret_itbl_addr
where
- ret_itbl_addr = case pk of
- PtrRep -> stg_ctoi_ret_R1p_info
- IntRep -> stg_ctoi_ret_R1n_info
- CharRep -> stg_ctoi_ret_R1n_info
- FloatRep -> stg_ctoi_ret_F1_info
- DoubleRep -> stg_ctoi_ret_D1_info
- _ -> pprPanic "mkBits.ctoi_itbl" (ppr pk)
+ ret_itbl_addr
+ = case pk of
+ PtrRep -> stg_ctoi_ret_R1p_info
+ WordRep -> stg_ctoi_ret_R1n_info
+ IntRep -> stg_ctoi_ret_R1n_info
+ AddrRep -> stg_ctoi_ret_R1n_info
+ CharRep -> stg_ctoi_ret_R1n_info
+ FloatRep -> stg_ctoi_ret_F1_info
+ DoubleRep -> stg_ctoi_ret_D1_info
+ VoidRep -> stg_ctoi_ret_V_info
+ other -> pprPanic "ByteCodeLink.ctoi_itbl" (ppr pk)
itoc_itbl st pk
= addr st ret_itbl_addr
where
- ret_itbl_addr = case pk of
- IntRep -> stg_gc_unbx_r1_info
- FloatRep -> stg_gc_f1_info
- DoubleRep -> stg_gc_d1_info
+ ret_itbl_addr
+ = case pk of
+ CharRep -> stg_gc_unbx_r1_info
+ IntRep -> stg_gc_unbx_r1_info
+ WordRep -> stg_gc_unbx_r1_info
+ AddrRep -> stg_gc_unbx_r1_info
+ FloatRep -> stg_gc_f1_info
+ DoubleRep -> stg_gc_d1_info
+ VoidRep -> nullPtr
+ -- Interpreter.c spots this special case
+ other -> pprPanic "ByteCodeLink.itoc_itbl" (ppr pk)
-foreign label "stg_ctoi_ret_R1p_info" stg_ctoi_ret_R1p_info :: Addr
-foreign label "stg_ctoi_ret_R1n_info" stg_ctoi_ret_R1n_info :: Addr
-foreign label "stg_ctoi_ret_F1_info" stg_ctoi_ret_F1_info :: Addr
-foreign label "stg_ctoi_ret_D1_info" stg_ctoi_ret_D1_info :: Addr
+foreign label "stg_ctoi_ret_R1p_info" stg_ctoi_ret_R1p_info :: Ptr ()
+foreign label "stg_ctoi_ret_R1n_info" stg_ctoi_ret_R1n_info :: Ptr ()
+foreign label "stg_ctoi_ret_F1_info" stg_ctoi_ret_F1_info :: Ptr ()
+foreign label "stg_ctoi_ret_D1_info" stg_ctoi_ret_D1_info :: Ptr ()
+foreign label "stg_ctoi_ret_V_info" stg_ctoi_ret_V_info :: Ptr ()
-foreign label "stg_gc_unbx_r1_info" stg_gc_unbx_r1_info :: Addr
-foreign label "stg_gc_f1_info" stg_gc_f1_info :: Addr
-foreign label "stg_gc_d1_info" stg_gc_d1_info :: Addr
+foreign label "stg_gc_unbx_r1_info" stg_gc_unbx_r1_info :: Ptr ()
+foreign label "stg_gc_f1_info" stg_gc_f1_info :: Ptr ()
+foreign label "stg_gc_d1_info" stg_gc_d1_info :: Ptr ()
-- The size in 16-bit entities of an instruction.
instrSize16s :: BCInstr -> Int
instrSize16s instr
= case instr of
+ STKCHECK _ -> 2
ARGCHECK _ -> 2
PUSH_L _ -> 2
PUSH_LL _ _ -> 3
TESTEQ_D _ _ -> 3
TESTLT_P _ _ -> 3
TESTEQ_P _ _ -> 3
+ JMP _ -> 2
CASEFAIL -> 1
ENTER -> 1
RETURN _ -> 2
-- Make lists of host-sized words for literals, so that when the
-- words are placed in memory at increasing addresses, the
-- bit pattern is correct for the host's word size and endianness.
-mkLitI :: Int -> [Word]
-mkLitF :: Float -> [Word]
-mkLitD :: Double -> [Word]
-mkLitA :: Addr -> [Word]
+mkLitI :: Int -> [Word]
+mkLitF :: Float -> [Word]
+mkLitD :: Double -> [Word]
+mkLitPtr :: Ptr () -> [Word]
+mkLitI64 :: Int64 -> [Word]
mkLitF f
= runST (do
- arr <- newFloatArray ((0::Int),0)
- writeFloatArray arr 0 f
+ arr <- newArray_ ((0::Int),0)
+ writeArray arr 0 f
f_arr <- castSTUArray arr
- w0 <- readWordArray f_arr 0
- return [w0]
+ w0 <- readArray f_arr 0
+ return [w0 :: Word]
)
mkLitD d
| wORD_SIZE == 4
= runST (do
- arr <- newDoubleArray ((0::Int),1)
- writeDoubleArray arr 0 d
+ arr <- newArray_ ((0::Int),1)
+ writeArray arr 0 d
+ d_arr <- castSTUArray arr
+ w0 <- readArray d_arr 0
+ w1 <- readArray d_arr 1
+ return [w0 :: Word, w1]
+ )
+ | wORD_SIZE == 8
+ = runST (do
+ arr <- newArray_ ((0::Int),0)
+ writeArray arr 0 d
+ d_arr <- castSTUArray arr
+ w0 <- readArray d_arr 0
+ return [w0 :: Word]
+ )
+
+mkLitI64 ii
+ | wORD_SIZE == 4
+ = runST (do
+ arr <- newArray_ ((0::Int),1)
+ writeArray arr 0 ii
d_arr <- castSTUArray arr
- w0 <- readWordArray d_arr 0
- w1 <- readWordArray d_arr 1
- return [w0,w1]
+ w0 <- readArray d_arr 0
+ w1 <- readArray d_arr 1
+ return [w0 :: Word,w1]
)
| wORD_SIZE == 8
= runST (do
- arr <- newDoubleArray ((0::Int),0)
- writeDoubleArray arr 0 d
+ arr <- newArray_ ((0::Int),0)
+ writeArray arr 0 ii
d_arr <- castSTUArray arr
- w0 <- readWordArray d_arr 0
- return [w0]
+ w0 <- readArray d_arr 0
+ return [w0 :: Word]
)
mkLitI i
= runST (do
- arr <- newIntArray ((0::Int),0)
- writeIntArray arr 0 i
+ arr <- newArray_ ((0::Int),0)
+ writeArray arr 0 i
i_arr <- castSTUArray arr
- w0 <- readWordArray i_arr 0
- return [w0]
+ w0 <- readArray i_arr 0
+ return [w0 :: Word]
)
-mkLitA a
+mkLitPtr a
= runST (do
- arr <- newAddrArray ((0::Int),0)
- writeAddrArray arr 0 a
+ arr <- newArray_ ((0::Int),0)
+ writeArray arr 0 a
a_arr <- castSTUArray arr
- w0 <- readWordArray a_arr 0
- return [w0]
+ w0 <- readArray a_arr 0
+ return [w0 :: Word]
)
-
\end{code}
%************************************************************************
\begin{code}
{-
-data BCO# = BCO# ByteArray# -- instrs :: array Word16#
- ByteArray# -- literals :: array Word32#
+data BCO# = BCO# ByteArray# -- instrs :: Array Word16#
+ ByteArray# -- literals :: Array Word32#
PtrArray# -- ptrs :: Array HValue
ByteArray# -- itbls :: Array Addr#
-}
-GLOBAL_VAR(v_cafTable, [], [HValue])
-
-addCAF :: HValue -> IO ()
-addCAF x = do xs <- readIORef v_cafTable
- --putStrLn ("addCAF " ++ show (1 + length xs))
- writeIORef v_cafTable (x:xs)
-
-
linkBCO ie ce (UnlinkedBCO nm insnsSS literalsSS ptrsSS itblsSS)
= do insns <- listFromSS insnsSS
literals <- listFromSS literalsSS
ptrs <- listFromSS ptrsSS
itbls <- listFromSS itblsSS
- linked_ptrs <- mapM (lookupCE ce) ptrs
- linked_itbls <- mapM (lookupIE ie) itbls
+ linked_ptrs <- mapM (lookupCE ce) ptrs
+ linked_itbls <- mapM (lookupIE ie) itbls
+ linked_literals <- mapM lookupLiteral literals
let n_insns = sizeSS insnsSS
n_literals = sizeSS literalsSS
:: UArray Int Word16
insns_barr = case insns_arr of UArray lo hi barr -> barr
- literals_arr = array (0, n_literals-1) (indexify literals)
+ literals_arr = array (0, n_literals-1) (indexify linked_literals)
:: UArray Int Word
literals_barr = case literals_arr of UArray lo hi barr -> barr
= IO (\s -> case newBCO# a b c d s of (# s1, bco #) -> (# s1, BCO bco #))
+lookupLiteral :: Either Word FastString -> IO Word
+lookupLiteral (Left w) = return w
+lookupLiteral (Right addr_of_label_string)
+ = do let label_to_find = unpackFS addr_of_label_string
+ m <- lookupSymbol label_to_find
+ case m of
+ -- Can't be bothered to find the official way to convert Addr# to Word#;
+ -- the FFI/Foreign designers make it too damn difficult
+ -- Hence we apply the Blunt Instrument, which works correctly
+ -- on all reasonable architectures anyway
+ Just (Ptr addr) -> return (W# (unsafeCoerce# addr))
+ Nothing -> linkFail "ByteCodeLink: can't find label"
+ label_to_find
+
lookupCE :: ClosureEnv -> Either Name PrimOp -> IO HValue
lookupCE ce (Right primop)
- = do m <- lookupSymbol (primopToCLabel primop "closure")
+ = do let sym_to_find = primopToCLabel primop "closure"
+ m <- lookupSymbol sym_to_find
case m of
Just (Ptr addr) -> case addrToHValue# addr of
- (# hval #) -> do addCAF hval
- return hval
- Nothing -> pprPanic "ByteCodeGen.lookupCE(primop)" (ppr primop)
+ (# hval #) -> return hval
+ Nothing -> linkFail "ByteCodeLink.lookupCE(primop)" sym_to_find
lookupCE ce (Left nm)
= case lookupFM ce nm of
Just aa -> return aa
Nothing
- -> do m <- lookupSymbol (nameToCLabel nm "closure")
+ -> ASSERT2(isExternalName nm, ppr nm)
+ do let sym_to_find = nameToCLabel nm "closure"
+ m <- lookupSymbol sym_to_find
case m of
Just (Ptr addr) -> case addrToHValue# addr of
- (# hval #) -> do addCAF hval
- return hval
- Nothing -> pprPanic "ByteCodeGen.lookupCE" (ppr nm)
+ (# hval #) -> return hval
+ Nothing -> linkFail "ByteCodeLink.lookupCE" sym_to_find
lookupIE :: ItblEnv -> Name -> IO (Ptr a)
lookupIE ie con_nm
Just (Ptr a) -> return (Ptr a)
Nothing
-> do -- try looking up in the object files.
- m <- lookupSymbol (nameToCLabel con_nm "con_info")
+ let sym_to_find1 = nameToCLabel con_nm "con_info"
+ m <- lookupSymbol sym_to_find1
case m of
Just addr -> return addr
Nothing
-> do -- perhaps a nullary constructor?
- n <- lookupSymbol (nameToCLabel con_nm "static_info")
+ let sym_to_find2 = nameToCLabel con_nm "static_info"
+ n <- lookupSymbol sym_to_find2
case n of
Just addr -> return addr
- Nothing -> pprPanic "ByteCodeGen.lookupIE" (ppr con_nm)
+ Nothing -> linkFail "ByteCodeLink.lookupIE"
+ (sym_to_find1 ++ " or " ++ sym_to_find2)
+
+linkFail :: String -> String -> IO a
+linkFail who what
+ = throwDyn (ProgramError $
+ unlines [ ""
+ , "During interactive linking, GHCi couldn't find the following symbol:"
+ , ' ' : ' ' : what
+ , "This may be due to you not asking GHCi to load extra object files,"
+ , "archives or DLLs needed by your current session. Restart GHCi, specifying"
+ , "the missing library using the -L/path/to/object/dir and -lmissinglibname"
+ , "flags, or simply by naming the relevant files on the GHCi command line."
+ , "Alternatively, this link failure might indicate a bug in GHCi."
+ , "If you suspect the latter, please send a bug report to:"
+ , " glasgow-haskell-bugs@haskell.org"
+ ])
-- HACKS!!! ToDo: cleaner
nameToCLabel :: Name -> String{-suffix-} -> String
nameToCLabel n suffix
- = _UNPK_(moduleNameFS (rdrNameModule rn))
+ = unpackFS(moduleNameFS (rdrNameModule rn))
++ '_':occNameString(rdrNameOcc rn) ++ '_':suffix
where rn = toRdrName n
primopToCLabel :: PrimOp -> String{-suffix-} -> String
primopToCLabel primop suffix
- = let str = "PrelPrimopWrappers_" ++ occNameString (primOpOcc primop) ++ '_':suffix
- in trace ("primopToCLabel: " ++ str)
+ = let str = "GHCziPrimopWrappers_" ++ occNameString (primOpOcc primop) ++ '_':suffix
+ in --trace ("primopToCLabel: " ++ str)
str
\end{code}
i_CASEFAIL = (bci_CASEFAIL :: Int)
i_ENTER = (bci_ENTER :: Int)
i_RETURN = (bci_RETURN :: Int)
+i_STKCHECK = (bci_STKCHECK :: Int)
+i_JMP = (bci_JMP :: Int)
+#ifdef bci_CCALL
+i_CCALL = (bci_CCALL :: Int)
+i_SWIZZLE = (bci_SWIZZLE :: Int)
+#else
+i_CCALL = error "Sorry pal, you need to bootstrap to use i_CCALL."
+i_SWIZZLE = error "Sorry pal, you need to bootstrap to use i_SWIZZLE."
+#endif
+
+iNTERP_STACK_CHECK_THRESH = (INTERP_STACK_CHECK_THRESH :: Int)
\end{code}
projects / ghc-hetmet.git / blobdiff