1 {-# LANGUAGE OverloadedStrings #-}
2 module Mate.ClassPool (
11 getInterfaceMethodOffset,
18 import qualified Data.Map as M
19 import qualified Data.Set as S
21 import qualified Data.ByteString.Lazy as B
22 import Data.String.Utils
28 import Foreign.C.Types
29 import Foreign.Storable
32 import System.IO.Unsafe
33 import System.Directory
37 import Java.ClassPath hiding (Directory)
40 import Mate.BasicBlocks
41 import {-# SOURCE #-} Mate.MethodPool
44 import Mate.GarbageAlloc
45 import Mate.NativeSizes
46 import {-# SOURCE #-} Mate.ClassHierarchy
48 getClassInfo :: B.ByteString -> IO ClassInfo
49 getClassInfo path = do
50 class_map <- getClassMap
51 case M.lookup path class_map of
52 Nothing -> loadAndInitClass path
55 classLoaded :: B.ByteString -> IO Bool
57 class_map <- getClassMap
58 return $ M.member path class_map
60 getClassFile :: B.ByteString -> IO (Class Direct)
61 getClassFile path = do
62 ci <- getClassInfo path
65 getStaticFieldOffset :: B.ByteString -> B.ByteString -> IO CPtrdiff
66 getStaticFieldOffset path field = do
67 ci <- getClassInfo path
68 return $ fromIntegral $ ciStaticMap ci M.! field
70 getFieldOffset :: B.ByteString -> B.ByteString -> IO Int32
71 getFieldOffset path field = do
72 ci <- getClassInfo path
73 return $ ciFieldMap ci M.! field
75 -- method + signature plz!
76 getMethodOffset :: B.ByteString -> B.ByteString -> IO NativeWord
77 getMethodOffset path method = do
78 ci <- getClassInfo path
79 -- (+ ptrSize) one slot for "interface-table-ptr"
80 return $ (+ ptrSize) $ fromIntegral $ ciMethodMap ci M.! method
82 getMethodTable :: B.ByteString -> IO NativeWord
83 getMethodTable path = do
84 ci <- getClassInfo path
85 return $ ciMethodBase ci
87 getObjectSize :: B.ByteString -> IO NativeWord
88 getObjectSize path = do
89 ci <- getClassInfo path
90 -- TODO(bernhard): correct sizes for different types...
91 let fsize = fromIntegral $ M.size $ ciFieldMap ci
92 -- one slot for "method-table-ptr"
93 -- one slot for GC-data
94 return $ (2 + fsize) * ptrSize
96 getStaticFieldAddr :: CPtrdiff -> IO CPtrdiff
97 getStaticFieldAddr from = do
99 let w32_from = fromIntegral from
100 let sfi = trapmap M.! w32_from
101 setTrapMap $ M.delete w32_from trapmap
103 (StaticField (StaticFieldInfo cls field)) -> getStaticFieldOffset cls field
104 _ -> error "getFieldAddr: no TrapCause found. abort"
106 -- interface + method + signature plz!
107 getInterfaceMethodOffset :: B.ByteString -> B.ByteString -> B.ByteString -> IO NativeWord
108 getInterfaceMethodOffset ifname meth sig = do
110 ifmmap <- getInterfaceMethodMap
111 let k = ifname `B.append` meth `B.append` sig
112 case M.lookup k ifmmap of
113 Just w32 -> return $ w32 + 4
114 Nothing -> error "getInterfaceMethodOffset: no offset set"
117 readClass :: B.ByteString -> IO ClassInfo
119 class_map' <- getClassMap
120 case M.lookup path class_map' of
123 cfile <- readClassFile $ toString path
124 -- TODO(bernhard): hDumpClass
126 -- load all interfaces, which are implemented by this class
127 sequence_ [ loadInterface i | i <- interfaces cfile ]
128 superclass <- if path /= "java/lang/Object"
130 sc <- readClass $ superClass cfile
134 (staticmap, fieldmap) <- calculateFields cfile superclass
135 (methodmap, mbase) <- calculateMethodMap cfile superclass
136 immap <- getInterfaceMethodMap
138 -- allocate interface offset table for this class
139 -- TODO(bernhard): we have some duplicates in immap (i.e. some
140 -- entries have the same offset), so we could
141 -- save some memory here.
142 iftable <- mallocClassData ((ptrSize*) $ M.size immap)
143 let wn_iftable = fromIntegral $ ptrToIntPtr iftable :: NativeWord
144 -- store interface-table at offset 0 in method-table
145 pokeElemOff (intPtrToPtr $ fromIntegral mbase) 0 wn_iftable
146 let hexDumpMap :: Integral v => String -> M.Map B.ByteString v -> IO ()
147 hexDumpMap header mmap = do
148 let printValue :: B.ByteString -> IO ()
149 printValue key = printfCp $ printf "\t%-70s: 0x%08x\n" (toString key) val
150 where val = fromIntegral (mmap M.! key) :: NativeWord
151 printfCp $ printf "%s\n" header
152 mapM_ printValue (M.keys mmap)
155 let strpath = toString path
156 hexDumpMap ("staticmap @ " ++ strpath) staticmap
157 hexDumpMap ("fieldmap @ " ++ strpath) fieldmap
158 hexDumpMap ("methodmap @ " ++ strpath) methodmap
159 hexDumpMap ("interfacemap @ " ++ strpath) immap
160 printfCp $ printf "mbase: 0x%08x\n" mbase
161 printfCp $ printf "iftable: 0x%08x\n" wn_iftable
163 virtual_map <- getVirtualMap
164 setVirtualMap $ M.insert mbase path virtual_map
166 class_map <- getClassMap
167 let new_ci = ClassInfo path cfile staticmap fieldmap methodmap mbase False
168 setClassMap $ M.insert path new_ci class_map
170 -- add Class to Hierarchy
171 super_mtable <- case superclass of
173 Just x -> getMethodTable $ ciName x
174 addClassEntry mbase super_mtable
179 loadInterface :: B.ByteString -> IO ()
180 loadInterface path = do
181 imap <- getInterfaceMap
182 -- interface already loaded?
183 case M.lookup path imap of
186 printfCp $ printf "interface: loading \"%s\"\n" $ toString path
187 cfile <- readClassFile $ toString path
188 -- load "superinterfaces" first
189 sequence_ [ loadInterface i | i <- interfaces cfile ]
190 immap <- getInterfaceMethodMap
192 -- load map again, because there could be new entries now
193 -- due to loading superinterfaces
194 imap' <- getInterfaceMap
195 let max_off = fromIntegral $ M.size immap * ptrSize
196 -- create index of methods by this interface
197 let mm = zipbase max_off (classMethods cfile)
199 -- create for each method from *every* superinterface a entry to,
200 -- but just put in the same offset as it is already in the map
201 let (ifnames, methodnames) = unzip $ concat
202 [ zip (repeat ifname) (classMethods $ imap' M.! ifname)
203 | ifname <- interfaces cfile ]
204 let sm = zipWith (\x y -> (entry y, immap M.! getname x y)) ifnames methodnames
206 -- merge all offset tables
207 setInterfaceMethodMap $ M.fromList sm `M.union` M.fromList mm `M.union` immap
208 setInterfaceMap $ M.insert path cfile imap'
210 zipbase base = zipWith (\x y -> (entry y, x + base)) [0,ptrSize..]
212 getname p y = p `B.append` methodName y `B.append` encode (methodSignature y)
215 calculateFields :: Class Direct -> Maybe ClassInfo -> IO (FieldMap, FieldMap)
216 calculateFields cf superclass = do
217 -- TODO(bernhard): correct sizes. int only atm
219 let (sfields, ifields) = partition (S.member ACC_STATIC . fieldAccessFlags) (classFields cf)
221 let sc_sm = getsupermap superclass ciStaticMap
222 staticbase <- mallocClassData $ fromIntegral (length sfields) * ptrSize
223 let sm = zipbase (fromIntegral $ ptrToIntPtr staticbase) sfields
224 -- new fields "overwrite" old ones, if they have the same name
225 let staticmap = sm `M.union` sc_sm
227 let sc_im = getsupermap superclass ciFieldMap
228 -- "+ (2*ptrsize)" for the method table pointer and GC data
229 let max_off = (+ (2*ptrSize)) $ fromIntegral $ M.size sc_im * ptrSize
230 let im = zipbase max_off ifields
231 -- new fields "overwrite" old ones, if they have the same name
232 let fieldmap = im `M.union` sc_im
234 return (staticmap, fieldmap)
236 zipbase :: Int32 -> [Field Direct] -> FieldMap
237 zipbase base = foldr (\(x,y) -> M.insert (fieldName y) (x + base)) M.empty . zip [0,ptrSize..]
240 getsupermap :: Maybe ClassInfo -> (ClassInfo -> FieldMap) -> FieldMap
241 getsupermap superclass getter = case superclass of Just x -> getter x; Nothing -> M.empty
244 calculateMethodMap :: Class Direct -> Maybe ClassInfo -> IO (FieldMap, NativeWord)
245 calculateMethodMap cf superclass = do
247 (\x -> (not . S.member ACC_STATIC . methodAccessFlags) x &&
248 ((/=) "<init>" . methodName) x)
250 let sc_mm = getsupermap superclass ciMethodMap
251 let max_off = fromIntegral $ M.size sc_mm * ptrSize
252 let mm = zipbase max_off methods
253 let methodmap = M.fromList mm `M.union` sc_mm
255 -- (+1): one slot for the interface-table-ptr
256 methodbase <- mallocClassData (((+1) $ fromIntegral $ M.size methodmap) * ptrSize)
257 return (methodmap, fromIntegral $ ptrToIntPtr methodbase)
258 where zipbase base = zipWith (\x y -> (entry y, x + base)) [0,ptrSize..]
259 where entry y = methodName y `B.append` encode (methodSignature y)
262 loadAndInitClass :: B.ByteString -> IO ClassInfo
263 loadAndInitClass path = do
264 class_map <- getClassMap
265 ci <- case M.lookup path class_map of
266 Nothing -> readClass path
269 -- first try to execute class initializer of superclass
270 when (path /= "java/lang/Object") (void $ loadAndInitClass $ superClass $ ciFile ci)
272 -- execute class initializer
273 case lookupMethod "<clinit>" (ciFile ci) of
275 rawmethod <- parseMethod (ciFile ci) "<clinit>" $ MethodSignature [] ReturnsVoid
276 let mi = MethodInfo "<clinit>" path (methodSignature m)
277 entry <- compileBB rawmethod mi
278 addMethodRef entry mi [path]
279 printfCp $ printf "executing static initializer from %s now\n" (toString path)
281 printfCp $ printf "static initializer from %s done\n" (toString path)
284 class_map' <- getClassMap
285 let new_ci = ci { ciInitDone = True }
286 setClassMap $ M.insert path new_ci class_map'
290 readClassFile :: String -> IO (Class Direct)
291 readClassFile path' = readIORef classPaths >>= rcf
293 path = replace "." "/" path'
294 rcf :: [MClassPath] -> IO (Class Direct)
295 rcf [] = error $ "readClassFile: Class \"" ++ show path ++ "\" not found."
296 rcf (Directory pre:xs) = do
297 let cf = pre ++ path ++ ".class"
298 printfCp $ printf "rcf: searching @ %s for %s\n" (show pre) (show path)
299 b <- doesFileExist cf
301 then parseClassFile cf
304 printfCp $ printf "rcf: searching %s in JAR\n" (show path)
305 entry <- getEntry p path
307 Just (LoadedJAR _ cls) -> return cls
309 _ -> error $ "readClassFile: Class \"" ++ show path ++ "\" in JAR not found. #1"
315 classPaths :: IORef [MClassPath]
316 {-# NOINLINE classPaths #-}
317 classPaths = unsafePerformIO $ newIORef []
319 addClassPath :: String -> IO ()
321 cps <- readIORef classPaths
322 writeIORef classPaths (Directory x:cps)
324 addClassPathJAR :: String -> IO ()
325 addClassPathJAR x = do
326 cps <- readIORef classPaths
327 t <- execClassPath $ addJAR x
328 writeIORef classPaths (JAR t:cps)