#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
projects / mate.git / blobdiff