MapBB,
#ifdef DBG_BB
printMapBB,
- test_main,
#endif
parseMethod,
testCFG -- added by hs to perform benches from outside
import JVM.Converter
import JVM.Assembler
-import Mate.Utilities
import Mate.Types
import Mate.Debug
+import Mate.Utilities
#ifdef DEBUG
import Text.Printf
Nothing -> error $ "BlockID " ++ show i ++ " not found."
#endif
+#if 0
#ifdef DBG_BB
-testInstance :: String -> B.ByteString -> IO ()
-testInstance cf method = do
+testInstance :: String -> B.ByteString -> MethodSignature -> IO ()
+testInstance cf method sig = do
cls <- parseClassFile cf
- hmap <- parseMethod cls method
+ hmap <- parseMethod cls method sig
printMapBB hmap
#endif
test_03 = testInstance "./tests/While.class" "g"
test_04 = testInstance "./tests/Fac.class" "fac"
#endif
+#endif
-parseMethod :: Class Resolved -> B.ByteString -> IO (Maybe MapBB)
-parseMethod cls method = do
- let maybe_bb = testCFG $ lookupMethod method cls
- let msig = methodSignature $ (classMethods cls) !! 1
- printfBb "BB: analysing \"%s\"\n" $ toString (method `B.append` ": " `B.append` (encode msig))
+parseMethod :: Class Direct -> B.ByteString -> MethodSignature -> IO (Maybe MapBB)
+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)
#ifdef DBG_BB
printMapBB maybe_bb
#endif
-- small example how to get information about
-- exceptions of a method
-- TODO: remove ;-)
- let (Just m) = lookupMethod method cls
+ 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 Resolved) -> Maybe MapBB
+testCFG :: Maybe (Method Direct) -> Maybe MapBB
testCFG (Just m) = case attrByName m "Code" of
Nothing -> Nothing
Just bytecode -> Just $ buildCFG $ codeInstructions $ decodeMethod bytecode
markBackwardTargets [] = []
markBackwardTargets (x:[]) = [x]
markBackwardTargets insns@(x@((x_off,x_bbend),x_ins):y@((y_off,_),_):xs) =
- (x_new):(markBackwardTargets (y:xs))
+ x_new:markBackwardTargets (y:xs)
where
x_new = if isTarget then checkX y_off else x
checkX w16 = case x_bbend of
-- 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 ((_,Just (OneTarget w16)),_) = w16 == y_off
+ cmpOffset ((_,Just (TwoTarget _ w16)),_) = w16 == y_off
cmpOffset _ = False
value = parseBasicBlock y insns
entryi :: [BlockID]
- entryi = (if off == 0 then [0] else []) ++ -- also consider the entrypoint
- case entry of
- Just (TwoTarget t1 t2) -> [t1, t2]
- Just (OneTarget t) -> [t]
- Just (FallThrough t) -> [t]
- Just (Return) -> []
- Nothing -> []
+ 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
+ (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))
+ | p x = let (lastins, list) = takeWhilePlusOne p xs in (lastins, x:list)
| otherwise = (Just x,[x])
validins :: ((Int, Maybe BBEnd), Instruction) -> Bool
calculateInstructionOffset = cio' (0, Nothing)
where
newoffset :: Instruction -> Int -> Offset
- newoffset x off = (off + (fromIntegral $ B.length $ encodeInstructions [x]), Nothing)
+ 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
+ addW16Signed i w16 = i + fromIntegral s16
+ where s16 = fromIntegral w16 :: Int16
cio' :: Offset -> [Instruction] -> [OffIns]
cio' _ [] = []
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
_ -> ((off, Nothing), x):next
where
notarget = ((off, Just Return), x):next
- onetarget w16 = ((off, Just $ OneTarget $ (off `addW16Signed` w16)), 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