let paths = splitOn ":" cps
mapM_ addStuff paths
parseArgs xs True
- where
- addStuff :: String -> IO ()
- addStuff x
- | ".jar" `isSuffixOf` x = addClassPathJAR x
- | otherwise = addClassPath $ x ++ "/"
+ where
+ addStuff :: String -> IO ()
+ addStuff x
+ | ".jar" `isSuffixOf` x = addClassPathJAR x
+ | otherwise = addClassPath $ x ++ "/"
parseArgs ("-classpath":xs) _ = parseArgs ("-":xs) True -- usage
parseArgs (('-':_):_) _ = error "Usage: mate [-cp|-classpath <cp1:cp2:..>] [<class-file> | -jar <jar-file>]"
-- first argument which isn't prefixed by '-' should be a class file
#ifdef DBG_BB
printMapBB :: MapBB -> IO ()
printMapBB hmap = do
- putStr "BlockIDs: "
- let keys = M.keys hmap
- mapM_ (putStr . (flip (++)) ", " . show) keys
- putStrLn "\n\nBasicBlocks:"
- printMapBB' keys hmap
- where
- printMapBB' :: [BlockID] -> MapBB -> IO ()
- printMapBB' [] _ = return ()
- printMapBB' (i:is) hmap' = case M.lookup i hmap' of
- Just bb -> do
- putStrLn $ "Block " ++ (show i)
- mapM_ putStrLn (map ((++) "\t" . show) $ code bb)
- case successor bb of
- Return -> putStrLn ""
- FallThrough t1 -> putStrLn $ "Sucessor: " ++ (show t1) ++ "\n"
- OneTarget t1 -> putStrLn $ "Sucessor: " ++ (show t1) ++ "\n"
- TwoTarget t1 t2 -> putStrLn $ "Sucessor: " ++ (show t1) ++ ", " ++ (show t2) ++ "\n"
- printMapBB' is hmap
- Nothing -> error $ "BlockID " ++ show i ++ " not found."
+ putStr "BlockIDs: "
+ let keys = M.keys hmap
+ mapM_ (putStr . (flip (++)) ", " . show) keys
+ putStrLn "\n\nBasicBlocks:"
+ printMapBB' keys hmap
+ where
+ printMapBB' :: [BlockID] -> MapBB -> IO ()
+ printMapBB' [] _ = return ()
+ printMapBB' (i:is) hmap' = case M.lookup i hmap' of
+ Just bb -> do
+ putStrLn $ "Block " ++ (show i)
+ mapM_ putStrLn (map ((++) "\t" . show) $ code bb)
+ case successor bb of
+ Return -> putStrLn ""
+ FallThrough t1 -> putStrLn $ "Sucessor: " ++ (show t1) ++ "\n"
+ OneTarget t1 -> putStrLn $ "Sucessor: " ++ (show t1) ++ "\n"
+ TwoTarget t1 t2 -> putStrLn $ "Sucessor: " ++ (show t1) ++ ", " ++ (show t2) ++ "\n"
+ printMapBB' is hmap
+ Nothing -> error $ "BlockID " ++ show i ++ " not found."
#endif
#if 0
#ifdef DBG_BB
testInstance :: String -> B.ByteString -> MethodSignature -> IO ()
testInstance cf method sig = do
- cls <- parseClassFile cf
- hmap <- parseMethod cls method sig
- printMapBB hmap
+ cls <- parseClassFile cf
+ hmap <- parseMethod cls method sig
+ printMapBB hmap
#endif
#ifdef DBG_BB
parseMethod :: Class Direct -> B.ByteString -> MethodSignature -> IO (Maybe RawMethod)
parseMethod cls method sig = do
- let maybe_bb = testCFG $ lookupMethodSig method sig cls
- let msig = methodSignature $ classMethods cls !! 1
- printfBb "BB: analysing \"%s\"\n" $ toString (method `B.append` ": " `B.append` encode msig)
+ let maybe_bb = testCFG $ lookupMethodSig method sig cls
+ let msig = methodSignature $ classMethods cls !! 1
+ printfBb "BB: analysing \"%s\"\n" $ toString (method `B.append` ": " `B.append` encode msig)
#ifdef DBG_BB
- case maybe_bb of
- Just m -> printMapBB $ rawMapBB m
- Nothing -> return ()
+ case maybe_bb of
+ Just m -> printMapBB $ rawMapBB m
+ Nothing -> return ()
#endif
- -- small example how to get information about
- -- exceptions of a method
- -- TODO: remove ;-)
- let (Just m) = lookupMethodSig method sig cls
- case attrByName m "Code" of
- Nothing -> printfBb "exception: no handler for this method\n"
- Just exceptionstream -> do
- printfBb "exception: \"%s\"\n" (show $ codeExceptions $ decodeMethod exceptionstream)
- return maybe_bb
+ -- small example how to get information about
+ -- exceptions of a method
+ -- TODO: remove ;-)
+ let (Just m) = lookupMethodSig method sig cls
+ case attrByName m "Code" of
+ Nothing ->
+ printfBb "exception: no handler for this method\n"
+ Just exceptionstream ->
+ printfBb "exception: \"%s\"\n" (show $ codeExceptions $ decodeMethod exceptionstream)
+ return maybe_bb
testCFG :: Maybe (Method Direct) -> Maybe RawMethod
markBackwardTargets (x:[]) = [x]
markBackwardTargets insns@(x@((x_off,x_bbend),x_ins):y@((y_off,_),_):xs) =
x_new:markBackwardTargets (y:xs)
- where
- x_new = if isTarget then checkX y_off else x
- checkX w16 = case x_bbend of
- Just _ -> x -- already marked, don't change
- Nothing -> ((x_off, Just $ FallThrough w16), x_ins) -- mark previous insn
+ where
+ x_new = if isTarget then checkX y_off else x
+ checkX w16 = case x_bbend of
+ Just _ -> x -- already marked, don't change
+ Nothing -> ((x_off, Just $ FallThrough w16), x_ins) -- mark previous insn
- -- look through all remaining insns in the stream if there is a jmp to `y'
- isTarget = case find cmpOffset insns of Just _ -> True; Nothing -> False
- cmpOffset ((_,Just (OneTarget w16)),_) = w16 == y_off
- cmpOffset ((_,Just (TwoTarget _ w16)),_) = w16 == y_off
- cmpOffset _ = False
+ -- look through all remaining insns in the stream if there is a jmp to `y'
+ isTarget = case find cmpOffset insns of Just _ -> True; Nothing -> False
+ cmpOffset ((_,Just (OneTarget w16)),_) = w16 == y_off
+ cmpOffset ((_,Just (TwoTarget _ w16)),_) = w16 == y_off
+ cmpOffset _ = False
buildCFG' :: MapBB -> [OffIns] -> [OffIns] -> MapBB
buildCFG' hmap [] _ = hmap
buildCFG' hmap (((off, entry), _):xs) insns = buildCFG' (insertlist entryi hmap) xs insns
where
- insertlist :: [BlockID] -> MapBB -> MapBB
- insertlist [] hmap' = hmap'
- insertlist (y:ys) hmap' = insertlist ys newhmap
- where
- newhmap = if M.member y hmap' then hmap' else M.insert y value hmap'
- value = parseBasicBlock y insns
-
- entryi :: [BlockID]
- entryi = if off == 0 then 0:ys else ys -- also consider the entrypoint
- where ys = case entry of
- Just (TwoTarget t1 t2) -> [t1, t2]
- Just (OneTarget t) -> [t]
- Just (FallThrough t) -> [t]
- Just Return -> []
- Nothing -> []
+ insertlist :: [BlockID] -> MapBB -> MapBB
+ insertlist [] hmap' = hmap'
+ insertlist (y:ys) hmap' = insertlist ys newhmap
+ where
+ newhmap = if M.member y hmap' then hmap' else M.insert y value hmap'
+ value = parseBasicBlock y insns
+ entryi :: [BlockID]
+ entryi = if off == 0 then 0:ys else ys -- also consider the entrypoint
+ where
+ ys = case entry of
+ Just (TwoTarget t1 t2) -> [t1, t2]
+ Just (OneTarget t) -> [t]
+ Just (FallThrough t) -> [t]
+ Just Return -> []
+ Nothing -> []
parseBasicBlock :: Int -> [OffIns] -> BasicBlock
parseBasicBlock i insns = BasicBlock insonly endblock
where
- startlist = dropWhile (\((x,_),_) -> x < i) insns
- (Just ((_, Just endblock),_), is) = takeWhilePlusOne validins startlist
- insonly = snd $ unzip is
+ startlist = dropWhile (\((x,_),_) -> x < i) insns
+ (Just ((_, Just endblock),_), is) = takeWhilePlusOne validins startlist
+ insonly = snd $ unzip is
- -- also take last (non-matched) element and return it
- takeWhilePlusOne :: (a -> Bool) -> [a] -> (Maybe a,[a])
- takeWhilePlusOne _ [] = (Nothing,[])
- takeWhilePlusOne p (x:xs)
- | p x = let (lastins, list) = takeWhilePlusOne p xs in (lastins, x:list)
- | otherwise = (Just x,[x])
+ -- also take last (non-matched) element and return it
+ takeWhilePlusOne :: (a -> Bool) -> [a] -> (Maybe a,[a])
+ takeWhilePlusOne _ [] = (Nothing,[])
+ takeWhilePlusOne p (x:xs)
+ | p x = let (lastins, list) = takeWhilePlusOne p xs in (lastins, x:list)
+ | otherwise = (Just x,[x])
- validins :: ((Int, Maybe BBEnd), Instruction) -> Bool
- validins ((_,x),_) = case x of Just _ -> False; Nothing -> True
+ validins :: ((Int, Maybe BBEnd), Instruction) -> Bool
+ validins ((_,x),_) = case x of Just _ -> False; Nothing -> True
calculateInstructionOffset :: [Instruction] -> [OffIns]
calculateInstructionOffset = cio' (0, Nothing)
where
- newoffset :: Instruction -> Int -> Offset
- newoffset x off = (off + fromIntegral (B.length $ encodeInstructions [x]), Nothing)
-
- addW16Signed :: Int -> Word16 -> Int
- addW16Signed i w16 = i + fromIntegral s16
- where s16 = fromIntegral w16 :: Int16
-
- cio' :: Offset -> [Instruction] -> [OffIns]
- cio' _ [] = []
- -- TODO(bernhard): add more instruction with offset (IF_ACMP, JSR, ...)
- cio' (off,_) (x:xs) = case x of
- IF _ w16 -> twotargets w16
- IF_ICMP _ w16 -> twotargets w16
- IF_ACMP _ w16 -> twotargets w16
- IFNONNULL w16 -> twotargets w16
- IFNULL w16 -> twotargets w16
- GOTO w16 -> onetarget w16
- IRETURN -> notarget
- ARETURN -> notarget
- RETURN -> notarget
- _ -> ((off, Nothing), x):next
- where
- notarget = ((off, Just Return), x):next
- onetarget w16 = ((off, Just $ OneTarget (off `addW16Signed` w16)), x):next
- twotargets w16 = ((off, Just $ TwoTarget (off + 3) (off `addW16Signed` w16)), x):next
- next = cio' (newoffset x off) xs
+ newoffset :: Instruction -> Int -> Offset
+ newoffset x off = (off + fromIntegral (B.length $ encodeInstructions [x]), Nothing)
+
+ addW16Signed :: Int -> Word16 -> Int
+ addW16Signed i w16 = i + fromIntegral s16
+ where s16 = fromIntegral w16 :: Int16
+
+ cio' :: Offset -> [Instruction] -> [OffIns]
+ cio' _ [] = []
+ -- TODO(bernhard): add more instruction with offset (IF_ACMP, JSR, ...)
+ cio' (off,_) (x:xs) = case x of
+ IF _ w16 -> twotargets w16
+ IF_ICMP _ w16 -> twotargets w16
+ IF_ACMP _ w16 -> twotargets w16
+ IFNONNULL w16 -> twotargets w16
+ IFNULL w16 -> twotargets w16
+ GOTO w16 -> onetarget w16
+ IRETURN -> notarget
+ ARETURN -> notarget
+ RETURN -> notarget
+ _ -> ((off, Nothing), x):next
+ where
+ notarget = ((off, Just Return), x):next
+ onetarget w16 = ((off, Just $ OneTarget (off `addW16Signed` w16)), x):next
+ twotargets w16 = ((off, Just $ TwoTarget (off + 3) (off `addW16Signed` w16)), x):next
+ next = cio' (newoffset x off) xs
setInterfaceMethodMap $ M.fromList sm `M.union` M.fromList mm `M.union` immap
setInterfaceMap $ M.insert path cfile imap'
where
- zipbase base = zipWith (\x y -> (entry y, x + base)) [0,4..]
- entry = getname path
- getname p y = p `B.append` methodName y `B.append` encode (methodSignature y)
+ zipbase base = zipWith (\x y -> (entry y, x + base)) [0,4..]
+ entry = getname path
+ getname p y = p `B.append` methodName y `B.append` encode (methodSignature y)
calculateFields :: Class Direct -> Maybe ClassInfo -> IO (FieldMap, FieldMap)
return (staticmap, fieldmap)
where
- zipbase :: Int32 -> [Field Direct] -> FieldMap
- zipbase base = foldr (\(x,y) -> M.insert (fieldName y) (x + base)) M.empty . zip [0,4..]
+ zipbase :: Int32 -> [Field Direct] -> FieldMap
+ zipbase base = foldr (\(x,y) -> M.insert (fieldName y) (x + base)) M.empty . zip [0,4..]
-- helper
getsupermap :: Maybe ClassInfo -> (ClassInfo -> FieldMap) -> FieldMap
readClassFile :: String -> IO (Class Direct)
readClassFile path' = readIORef classPaths >>= rcf
where
- path = replace "." "/" path'
- rcf :: [MClassPath] -> IO (Class Direct)
- rcf [] = error $ "readClassFile: Class \"" ++ show path ++ "\" not found."
- rcf (Directory pre:xs) = do
- let cf = pre ++ path ++ ".class"
- printfCp "rcf: searching @ %s for %s\n" (show pre) (show path)
- b <- doesFileExist cf
- if b
- then parseClassFile cf
- else rcf xs
- rcf (JAR p:xs) = do
- printfCp "rcf: searching %s in JAR\n" (show path)
- entry <- getEntry p path
- case entry of
- Just (LoadedJAR _ cls) -> return cls
- Nothing -> rcf xs
- _ -> error $ "readClassFile: Class \"" ++ show path ++ "\" in JAR not found. #1"
+ path = replace "." "/" path'
+ rcf :: [MClassPath] -> IO (Class Direct)
+ rcf [] = error $ "readClassFile: Class \"" ++ show path ++ "\" not found."
+ rcf (Directory pre:xs) = do
+ let cf = pre ++ path ++ ".class"
+ printfCp "rcf: searching @ %s for %s\n" (show pre) (show path)
+ b <- doesFileExist cf
+ if b
+ then parseClassFile cf
+ else rcf xs
+ rcf (JAR p:xs) = do
+ printfCp "rcf: searching %s in JAR\n" (show path)
+ entry <- getEntry p path
+ case entry of
+ Just (LoadedJAR _ cls) -> return cls
+ Nothing -> rcf xs
+ _ -> error $ "readClassFile: Class \"" ++ show path ++ "\" in JAR not found. #1"
data MClassPath =
Directory String |
let w32_from = fromIntegral signal_from
let mi = tmap M.! w32_from
let mi'@(MethodInfo method cm sig) =
- case mi of
- (StaticMethod x) -> x
- (VirtualMethod _ (MethodInfo methname _ msig)) -> newMi methname msig
- (InterfaceMethod _ (MethodInfo methname _ msig)) -> newMi methname msig
- _ -> error "getMethodEntry: no TrapCause found. abort."
- where newMi mn = MethodInfo mn (vmap M.! fromIntegral methodtable)
+ case mi of
+ (StaticMethod x) -> x
+ (VirtualMethod _ (MethodInfo methname _ msig)) -> newMi methname msig
+ (InterfaceMethod _ (MethodInfo methname _ msig)) -> newMi methname msig
+ _ -> error "getMethodEntry: no TrapCause found. abort."
+ where newMi mn = MethodInfo mn (vmap M.! fromIntegral methodtable)
-- bernhard (TODO): doesn't work with gnu classpath at some point. didn't
-- figured out the problem yet :/ therefore, I have no
-- testcase for replaying the situation.
supercl <- getClassFile (superClass cls)
lookupMethodRecursive name sig nextclsn supercl
where
- res = lookupMethodSig name sig cls
- thisname = thisClass cls
- nextclsn :: [B.ByteString]
- nextclsn = thisname:clsnames
+ res = lookupMethodSig name sig cls
+ thisname = thisClass cls
+ nextclsn :: [B.ByteString]
+ nextclsn = thisname:clsnames
-- TODO(bernhard): UBERHAX. ghc patch?
foreign import ccall safe "lookupSymbol"
loadNativeFunction :: String -> IO Word32
loadNativeFunction sym = do
- _ <- loadRawObject "ffi/native.o"
- -- TODO(bernhard): WTF
- resolveObjs (return ())
- ptr <- withCString sym c_lookupSymbol
- if ptr == nullPtr
- then error $ "dyn. loading of \"" ++ sym ++ "\" failed."
- else return $ fromIntegral $ ptrToIntPtr ptr
+ _ <- loadRawObject "ffi/native.o"
+ -- TODO(bernhard): WTF
+ resolveObjs (return ())
+ ptr <- withCString sym c_lookupSymbol
+ if ptr == nullPtr
+ then error $ "dyn. loading of \"" ++ sym ++ "\" failed."
+ else return $ fromIntegral $ ptrToIntPtr ptr
-- t_01 :: IO ()
-- t_01 = do
-- TODO: find combinator do match try semantics here
-- Solution: use list because list is MonadPlus instance
-- other solution add maybe monadplus implementation
-conflicts (IGraph xs) (label,anotherLabel) = let comparison = edgeEq (label,anotherLabel)
- comparison' = edgeEq (anotherLabel,label)
- in isJust (find comparison xs) || isJust (find comparison' xs)
+conflicts (IGraph xs) (label,anotherLabel) =
+ let comparison = edgeEq (label,anotherLabel)
+ comparison' = edgeEq (anotherLabel,label)
+ in isJust (find comparison xs) || isJust (find comparison' xs)
isParticipiant label (from,to) = from == label || to == label
buildMethodID :: Class Direct -> Word16 -> MethodInfo
buildMethodID cls idx = MethodInfo (ntName nt) rc (ntSignature nt)
- where (rc, nt) = case constsPool cls M.! idx of
- (CMethod rc' nt') -> (rc', nt')
- (CIfaceMethod rc' nt') -> (rc', nt')
- _ -> error "buildMethodID: something wrong. abort."
+ where
+ (rc, nt) = case constsPool cls M.! idx of
+ (CMethod rc' nt') -> (rc', nt')
+ (CIfaceMethod rc' nt') -> (rc', nt')
+ _ -> error "buildMethodID: something wrong. abort."
buildStaticFieldID :: Class Direct -> Word16 -> StaticFieldInfo
buildStaticFieldID cls idx = StaticFieldInfo rc (ntName fnt)
methodGetArgsCount :: Class Direct -> Word16 -> Word32
methodGetArgsCount cls idx = fromIntegral $ length args
where
- nt = case constsPool cls M.! idx of
- (CMethod _ nt') -> nt'
- (CIfaceMethod _ nt') -> nt'
- _ -> error "methodGetArgsCount: something wrong. abort."
- (MethodSignature args _) = ntSignature nt
+ nt = case constsPool cls M.! idx of
+ (CMethod _ nt') -> nt'
+ (CIfaceMethod _ nt') -> nt'
+ _ -> error "methodGetArgsCount: something wrong. abort."
+ (MethodSignature args _) = ntSignature nt
-- TODO(bernhard): Extend it to more than just int, and provide typeinformation
methodHaveReturnValue :: Class Direct -> Word16 -> Bool
(Returns (ObjectType _)) -> True;
_ -> error $ "methodHaveReturnValue: todo: " ++ show ret
where
- nt = case constsPool cls M.! idx of
- (CMethod _ nt') -> nt'
- (CIfaceMethod _ nt') -> nt'
- _ -> error "methodHaveReturnValue: something wrong. abort."
- (MethodSignature _ ret) = ntSignature nt
+ nt = case constsPool cls M.! idx of
+ (CMethod _ nt') -> nt'
+ (CIfaceMethod _ nt') -> nt'
+ _ -> error "methodHaveReturnValue: something wrong. abort."
+ (MethodSignature _ ret) = ntSignature nt
lookupMethodSig :: B.ByteString -> MethodSignature -> Class Direct -> Maybe (Method Direct)
lookupMethodSig name sig cls =
emitFromBB :: B.ByteString -> MethodSignature -> Class Direct -> RawMethod -> CodeGen e s (CompileInfo, [Instruction])
-emitFromBB methodname sig cls method = do
- let keys = M.keys hmap
- llmap <- mapM (newNamedLabel . (++) "bb_" . show) keys
- let lmap = zip keys llmap
- ep <- getEntryPoint
- push ebp
- mov ebp esp
- sub esp (fromIntegral ((rawLocals method) * 4) :: Word32)
-
- (calls, bbstarts) <- efBB (0, hmap M.! 0) M.empty M.empty lmap
- d <- disassemble
- end <- getCodeOffset
- return ((ep, bbstarts, end, calls), d)
+emitFromBB methodname sig cls method = do
+ let keys = M.keys hmap
+ llmap <- mapM (newNamedLabel . (++) "bb_" . show) keys
+ let lmap = zip keys llmap
+ ep <- getEntryPoint
+ push ebp
+ mov ebp esp
+ sub esp (fromIntegral ((rawLocals method) * 4) :: Word32)
+
+ (calls, bbstarts) <- efBB (0, hmap M.! 0) M.empty M.empty lmap
+ d <- disassemble
+ end <- getCodeOffset
+ return ((ep, bbstarts, end, calls), d)
where
hmap = rawMapBB method
efBB :: (BlockID, BasicBlock) -> TrapMap -> BBStarts -> [(BlockID, Label)] -> CodeGen e s (TrapMap, BBStarts)
efBB (bid, bb) calls bbstarts lmap =
- if M.member bid bbstarts then
- return (calls, bbstarts)
- else do
- bb_offset <- getCodeOffset
- let bbstarts' = M.insert bid bb_offset bbstarts
- defineLabel $ getLabel bid lmap
- cs <- mapM emit'' $ code bb
- let calls' = calls `M.union` M.fromList (catMaybes cs)
- case successor bb of
- Return -> return (calls', bbstarts')
- FallThrough t -> do
- -- TODO(bernhard): le dirty hax. see java/lang/Integer.toString(int, int)
- jmp (getLabel t lmap)
- efBB (t, hmap M.! t) calls' bbstarts' lmap
- OneTarget t -> efBB (t, hmap M.! t) calls' bbstarts' lmap
- TwoTarget t1 t2 -> do
- (calls'', bbstarts'') <- efBB (t1, hmap M.! t1) calls' bbstarts' lmap
- efBB (t2, hmap M.! t2) calls'' bbstarts'' lmap
+ if M.member bid bbstarts then
+ return (calls, bbstarts)
+ else do
+ bb_offset <- getCodeOffset
+ let bbstarts' = M.insert bid bb_offset bbstarts
+ defineLabel $ getLabel bid lmap
+ cs <- mapM emit'' $ code bb
+ let calls' = calls `M.union` M.fromList (catMaybes cs)
+ case successor bb of
+ Return -> return (calls', bbstarts')
+ FallThrough t -> do
+ -- TODO(bernhard): le dirty hax. see java/lang/Integer.toString(int, int)
+ jmp (getLabel t lmap)
+ efBB (t, hmap M.! t) calls' bbstarts' lmap
+ OneTarget t -> efBB (t, hmap M.! t) calls' bbstarts' lmap
+ TwoTarget t1 t2 -> do
+ (calls'', bbstarts'') <- efBB (t1, hmap M.! t1) calls' bbstarts' lmap
+ efBB (t2, hmap M.! t2) calls'' bbstarts'' lmap
-- TODO(bernhard): also use metainformation
-- TODO(bernhard): implement `emit' as function which accepts a list of
-- instructions, so we can use patterns for optimizations
emitInvoke :: Word16 -> Bool -> CodeGen e s (Maybe (Word32, TrapCause))
emitInvoke cpidx hasThis = do
- let l = buildMethodID cls cpidx
- calladdr <- getCurrentOffset
- newNamedLabel (show l) >>= defineLabel
- -- causes SIGILL. in the signal handler we patch it to the acutal call.
- -- place a nop at the end, therefore the disasm doesn't screw up
- emit32 (0xffff9090 :: Word32) >> emit8 (0x90 :: Word8)
- -- discard arguments on stack
- let argcnt = ((if hasThis then 1 else 0) + methodGetArgsCount cls cpidx) * 4
- when (argcnt > 0) (add esp argcnt)
- -- push result on stack if method has a return value
- when (methodHaveReturnValue cls cpidx) (push eax)
- -- +2 is for correcting eip in trap context
- return $ Just (calladdr + 2, StaticMethod l)
+ let l = buildMethodID cls cpidx
+ calladdr <- getCurrentOffset
+ newNamedLabel (show l) >>= defineLabel
+ -- causes SIGILL. in the signal handler we patch it to the acutal call.
+ -- place a nop at the end, therefore the disasm doesn't screw up
+ emit32 (0xffff9090 :: Word32) >> emit8 (0x90 :: Word8)
+ -- discard arguments on stack
+ let argcnt = ((if hasThis then 1 else 0) + methodGetArgsCount cls cpidx) * 4
+ when (argcnt > 0) (add esp argcnt)
+ -- push result on stack if method has a return value
+ when (methodHaveReturnValue cls cpidx) (push eax)
+ -- +2 is for correcting eip in trap context
+ return $ Just (calladdr + 2, StaticMethod l)
invokeEpilog :: Word16 -> Word32 -> (Bool -> TrapCause) -> CodeGen e s (Maybe (Word32, TrapCause))
invokeEpilog cpidx offset trapcause = do
- -- make actual (indirect) call
- calladdr <- getCurrentOffset
- call (Disp offset, eax)
- -- discard arguments on stack (+4 for "this")
- let argcnt = 4 + 4 * methodGetArgsCount cls cpidx
- when (argcnt > 0) (add esp argcnt)
- -- push result on stack if method has a return value
- when (methodHaveReturnValue cls cpidx) (push eax)
- let imm8 = is8BitOffset offset
- return $ Just (calladdr + (if imm8 then 3 else 6), trapcause imm8)
+ -- make actual (indirect) call
+ calladdr <- getCurrentOffset
+ call (Disp offset, eax)
+ -- discard arguments on stack (+4 for "this")
+ let argcnt = 4 + 4 * methodGetArgsCount cls cpidx
+ when (argcnt > 0) (add esp argcnt)
+ -- push result on stack if method has a return value
+ when (methodHaveReturnValue cls cpidx) (push eax)
+ let imm8 = is8BitOffset offset
+ return $ Just (calladdr + (if imm8 then 3 else 6), trapcause imm8)
emit'' :: J.Instruction -> CodeGen e s (Maybe (Word32, TrapCause))
emit'' insn = newNamedLabel ("jvm_insn: " ++ show insn) >>= defineLabel >> emit' insn
emit' (INVOKESPECIAL cpidx) = emitInvoke cpidx True
emit' (INVOKESTATIC cpidx) = emitInvoke cpidx False
emit' (INVOKEINTERFACE cpidx _) = do
- -- get methodInfo entry
- let mi@(MethodInfo methodname ifacename msig@(MethodSignature args _)) = buildMethodID cls cpidx
- newNamedLabel (show mi) >>= defineLabel
- -- objref lives somewhere on the argument stack
- mov eax (Disp ((*4) $ fromIntegral $ length args), esp)
- -- get method-table-ptr, keep it in eax (for trap handling)
- mov eax (Disp 0, eax)
- -- get interface-table-ptr
- mov ebx (Disp 0, eax)
- -- get method offset
- offset <- liftIO $ getInterfaceMethodOffset ifacename methodname (encode msig)
- -- note, that "mi" has the wrong class reference here.
- -- we figure that out at run-time, in the methodpool,
- -- depending on the method-table-ptr
- invokeEpilog cpidx offset (`InterfaceMethod` mi)
+ -- get methodInfo entry
+ let mi@(MethodInfo methodname ifacename msig@(MethodSignature args _)) = buildMethodID cls cpidx
+ newNamedLabel (show mi) >>= defineLabel
+ -- objref lives somewhere on the argument stack
+ mov eax (Disp ((*4) $ fromIntegral $ length args), esp)
+ -- get method-table-ptr, keep it in eax (for trap handling)
+ mov eax (Disp 0, eax)
+ -- get interface-table-ptr
+ mov ebx (Disp 0, eax)
+ -- get method offset
+ offset <- liftIO $ getInterfaceMethodOffset ifacename methodname (encode msig)
+ -- note, that "mi" has the wrong class reference here.
+ -- we figure that out at run-time, in the methodpool,
+ -- depending on the method-table-ptr
+ invokeEpilog cpidx offset (`InterfaceMethod` mi)
emit' (INVOKEVIRTUAL cpidx) = do
- -- get methodInfo entry
- let mi@(MethodInfo methodname objname msig@(MethodSignature args _)) = buildMethodID cls cpidx
- newNamedLabel (show mi) >>= defineLabel
- -- objref lives somewhere on the argument stack
- mov eax (Disp ((*4) $ fromIntegral $ length args), esp)
- -- get method-table-ptr
- mov eax (Disp 0, eax)
- -- get method offset
- let nameAndSig = methodname `B.append` encode msig
- offset <- liftIO $ getMethodOffset objname nameAndSig
- -- note, that "mi" has the wrong class reference here.
- -- we figure that out at run-time, in the methodpool,
- -- depending on the method-table-ptr
- invokeEpilog cpidx offset (`VirtualMethod` mi)
+ -- get methodInfo entry
+ let mi@(MethodInfo methodname objname msig@(MethodSignature args _)) = buildMethodID cls cpidx
+ newNamedLabel (show mi) >>= defineLabel
+ -- objref lives somewhere on the argument stack
+ mov eax (Disp ((*4) $ fromIntegral $ length args), esp)
+ -- get method-table-ptr
+ mov eax (Disp 0, eax)
+ -- get method offset
+ let nameAndSig = methodname `B.append` encode msig
+ offset <- liftIO $ getMethodOffset objname nameAndSig
+ -- note, that "mi" has the wrong class reference here.
+ -- we figure that out at run-time, in the methodpool,
+ -- depending on the method-table-ptr
+ invokeEpilog cpidx offset (`VirtualMethod` mi)
emit' (PUTSTATIC cpidx) = do
- pop eax
- trapaddr <- getCurrentOffset
- mov (Addr 0x00000000) eax -- it's a trap
- return $ Just (trapaddr, StaticField $ buildStaticFieldID cls cpidx)
+ pop eax
+ trapaddr <- getCurrentOffset
+ mov (Addr 0x00000000) eax -- it's a trap
+ return $ Just (trapaddr, StaticField $ buildStaticFieldID cls cpidx)
emit' (GETSTATIC cpidx) = do
- trapaddr <- getCurrentOffset
- mov eax (Addr 0x00000000) -- it's a trap
- push eax
- return $ Just (trapaddr, StaticField $ buildStaticFieldID cls cpidx)
+ trapaddr <- getCurrentOffset
+ mov eax (Addr 0x00000000) -- it's a trap
+ push eax
+ return $ Just (trapaddr, StaticField $ buildStaticFieldID cls cpidx)
emit' insn = emit insn >> return Nothing
emit :: J.Instruction -> CodeGen e s ()
emit DUP_X2 = do pop eax; pop ebx; pop ecx; push eax; push ecx; push ebx; push eax
emit AASTORE = emit IASTORE
emit IASTORE = do
- pop eax -- value
- pop ebx -- offset
- add ebx (1 :: Word32)
- pop ecx -- aref
- mov (ecx, ebx, S4) eax
+ pop eax -- value
+ pop ebx -- offset
+ add ebx (1 :: Word32)
+ pop ecx -- aref
+ mov (ecx, ebx, S4) eax
emit CASTORE = do
- pop eax -- value
- pop ebx -- offset
- add ebx (1 :: Word32)
- pop ecx -- aref
- mov (ecx, ebx, S1) eax -- TODO(bernhard): char is two byte
+ pop eax -- value
+ pop ebx -- offset
+ add ebx (1 :: Word32)
+ pop ecx -- aref
+ mov (ecx, ebx, S1) eax -- TODO(bernhard): char is two byte
emit AALOAD = emit IALOAD
emit IALOAD = do
- pop ebx -- offset
- add ebx (1 :: Word32)
- pop ecx -- aref
- push (ecx, ebx, S4)
+ pop ebx -- offset
+ add ebx (1 :: Word32)
+ pop ecx -- aref
+ push (ecx, ebx, S4)
emit CALOAD = do
- pop ebx -- offset
- add ebx (1 :: Word32)
- pop ecx -- aref
- push (ecx, ebx, S1) -- TODO(bernhard): char is two byte
+ pop ebx -- offset
+ add ebx (1 :: Word32)
+ pop ecx -- aref
+ push (ecx, ebx, S1) -- TODO(bernhard): char is two byte
emit ARRAYLENGTH = do
- pop eax
- push (Disp 0, eax)
+ pop eax
+ push (Disp 0, eax)
emit (ANEWARRAY _) = emit (NEWARRAY 10) -- 10 == T_INT
emit (NEWARRAY typ) = do
- let tsize = case decodeS (0 :: Integer) (B.pack [typ]) of
- T_INT -> 4
- T_CHAR -> 2
- _ -> error "newarray: type not implemented yet"
- -- get length from stack, but leave it there
- mov eax (Disp 0, esp)
- mov ebx (tsize :: Word32)
- -- multiple amount with native size of one element
- mul ebx -- result is in eax
- add eax (4 :: Word32) -- for "length" entry
- -- push amount of bytes to allocate
- push eax
- callMalloc
- pop eax -- ref to arraymemory
- pop ebx -- length
- mov (Disp 0, eax) ebx -- store length at offset 0
- push eax -- push ref again
+ let tsize = case decodeS (0 :: Integer) (B.pack [typ]) of
+ T_INT -> 4
+ T_CHAR -> 2
+ _ -> error "newarray: type not implemented yet"
+ -- get length from stack, but leave it there
+ mov eax (Disp 0, esp)
+ mov ebx (tsize :: Word32)
+ -- multiple amount with native size of one element
+ mul ebx -- result is in eax
+ add eax (4 :: Word32) -- for "length" entry
+ -- push amount of bytes to allocate
+ push eax
+ callMalloc
+ pop eax -- ref to arraymemory
+ pop ebx -- length
+ mov (Disp 0, eax) ebx -- store length at offset 0
+ push eax -- push ref again
emit (NEW objidx) = do
- let objname = buildClassID cls objidx
- amount <- liftIO $ getObjectSize objname
- push (amount :: Word32)
- callMalloc
- -- TODO(bernhard): save reference somewhere for GC
- -- set method table pointer
- mtable <- liftIO $ getMethodTable objname
- mov (Disp 0, eax) mtable
+ let objname = buildClassID cls objidx
+ amount <- liftIO $ getObjectSize objname
+ push (amount :: Word32)
+ callMalloc
+ -- TODO(bernhard): save reference somewhere for GC
+ -- set method table pointer
+ mtable <- liftIO $ getMethodTable objname
+ mov (Disp 0, eax) mtable
emit (CHECKCAST _) = nop -- TODO(bernhard): ...
-- TODO(bernhard): ...
emit (INSTANCEOF _) = do
emit (ISTORE_ x) = emit (ISTORE $ cArgs_ x)
emit (ASTORE x) = emit (ISTORE x)
emit (ISTORE x) = do
- pop eax
- mov (Disp (cArgs x), ebp) eax
+ pop eax
+ mov (Disp (cArgs x), ebp) eax
emit (LDC1 x) = emit (LDC2 $ fromIntegral x)
emit (LDC2 x) = do
- value <- case constsPool cls M.! x of
- (CString s) -> liftIO $ getUniqueStringAddr s
- (CInteger i) -> liftIO $ return i
- e -> error $ "LDCI... missing impl.: " ++ show e
- push value
+ value <- case constsPool cls M.! x of
+ (CString s) -> liftIO $ getUniqueStringAddr s
+ (CInteger i) -> liftIO $ return i
+ e -> error $ "LDCI... missing impl.: " ++ show e
+ push value
emit (GETFIELD x) = do
- offset <- emitFieldOffset x
- push (Disp (fromIntegral offset), eax) -- get field
+ offset <- emitFieldOffset x
+ push (Disp (fromIntegral offset), eax) -- get field
emit (PUTFIELD x) = do
- pop ebx -- value to write
- offset <- emitFieldOffset x
- mov (Disp (fromIntegral offset), eax) ebx -- set field
+ pop ebx -- value to write
+ offset <- emitFieldOffset x
+ mov (Disp (fromIntegral offset), eax) ebx -- set field
emit IADD = do pop ebx; pop eax; add eax ebx; push eax
emit ISUB = do pop ebx; pop eax; sub eax ebx; push eax
emit IUSHR = do pop ecx; pop eax; sar eax cl; push eax
emit INEG = do pop eax; neg eax; push eax
emit (IINC x imm) =
- add (Disp (cArgs x), ebp) (s8_w32 imm)
+ add (Disp (cArgs x), ebp) (s8_w32 imm)
emit (IFNONNULL x) = emit (IF C_NE x)
emit (IFNULL x) = emit (IF C_EQ x)
emit (IF_ACMP cond x) = emit (IF_ICMP cond x)
emit (IF_ICMP cond _) = do
- pop eax -- value2
- pop ebx -- value1
- cmp ebx eax -- intel syntax is swapped (TODO(bernhard): test that plz)
- emitIF cond
+ pop eax -- value2
+ pop ebx -- value1
+ cmp ebx eax -- intel syntax is swapped (TODO(bernhard): test that plz)
+ emitIF cond
emit (IF cond _) = do
- pop eax -- value1
- cmp eax (0 :: Word32) -- TODO(bernhard): test that plz
- emitIF cond
+ pop eax -- value1
+ cmp eax (0 :: Word32) -- TODO(bernhard): test that plz
+ emitIF cond
emit (GOTO _ ) = do
- let sid = case successor bb of OneTarget t -> t; _ -> error "bad"
- jmp $ getLabel sid lmap
+ let sid = case successor bb of OneTarget t -> t; _ -> error "bad"
+ jmp $ getLabel sid lmap
emit RETURN = do mov esp ebp; pop ebp; ret
emit ARETURN = emit IRETURN
emitFieldOffset :: Word16 -> CodeGen e s Int32
emitFieldOffset x = do
- pop eax -- this pointer
- let (cname, fname) = buildFieldOffset cls x
- liftIO $ getFieldOffset cname fname
+ pop eax -- this pointer
+ let (cname, fname) = buildFieldOffset cls x
+ liftIO $ getFieldOffset cname fname
emitIF :: CMP -> CodeGen e s ()
emitIF cond = let
callMalloc :: CodeGen e s ()
callMalloc = do
- call mallocObjectAddr
- add esp (4 :: Word32)
- push eax
+ call mallocObjectAddr
+ add esp (4 :: Word32)
+ push eax
-- for locals we use a different storage
cArgs :: Word8 -> Word32
- cArgs x = if x' >= thisMethodArgCnt
- -- TODO(bernhard): maybe s/(-4)/(-8)/
- then fromIntegral $ (-4) * (x' - thisMethodArgCnt + 1)
- else 4 + (thisMethodArgCnt * 4) - (4 * x')
- where x' = fromIntegral x
+ cArgs x =
+ if x' >= thisMethodArgCnt
+ -- TODO(bernhard): maybe s/(-4)/(-8)/
+ then fromIntegral $ (-4) * (x' - thisMethodArgCnt + 1)
+ else 4 + (thisMethodArgCnt * 4) - (4 * x')
+ where x' = fromIntegral x
cArgs_ :: IMM -> Word8
cArgs_ x = case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3
thisMethodArgCnt :: Word32
thisMethodArgCnt = isNonStatic + fromIntegral (length args)
where
- m = fromJust $ lookupMethodSig methodname sig cls
- (MethodSignature args _) = sig
- isNonStatic = if S.member ACC_STATIC (methodAccessFlags m)
- then 0 else 1 -- one argument for the this pointer
+ m = fromJust $ lookupMethodSig methodname sig cls
+ (MethodSignature args _) = sig
+ isNonStatic = if S.member ACC_STATIC (methodAccessFlags m)
+ then 0 else 1 -- one argument for the this pointer
-- sign extension from w8 to w32 (over s8)
projects / mate.git / commitdiff