2 {-# LANGUAGE OverloadedStrings #-}
4 module Mate.ClassPool (
13 getInterfaceMethodOffset,
21 import qualified Data.Map as M
22 import qualified Data.Set as S
24 import qualified Data.ByteString.Lazy as B
25 import Data.String.Utils
36 import Foreign.C.Types
37 import Foreign.Storable
40 import System.IO.Unsafe
41 import System.Directory
45 import Java.ClassPath hiding (Directory)
48 import Mate.BasicBlocks
49 import {-# SOURCE #-} Mate.MethodPool
52 import Mate.GarbageAlloc
53 import Mate.NativeSizes
55 getClassInfo :: B.ByteString -> IO ClassInfo
56 getClassInfo path = do
57 class_map <- getClassMap
58 case M.lookup path class_map of
59 Nothing -> loadAndInitClass path
62 classLoaded :: B.ByteString -> IO Bool
64 class_map <- getClassMap
65 return $ M.member path class_map
67 getClassFile :: B.ByteString -> IO (Class Direct)
68 getClassFile path = do
69 ci <- getClassInfo path
72 getStaticFieldOffset :: B.ByteString -> B.ByteString -> IO CPtrdiff
73 getStaticFieldOffset path field = do
74 ci <- getClassInfo path
75 return $ fromIntegral $ ciStaticMap ci M.! field
77 getFieldOffset :: B.ByteString -> B.ByteString -> IO Int32
78 getFieldOffset path field = do
79 ci <- getClassInfo path
80 return $ ciFieldMap ci M.! field
82 -- method + signature plz!
83 getMethodOffset :: B.ByteString -> B.ByteString -> IO Word32
84 getMethodOffset path method = do
85 ci <- getClassInfo path
86 -- (+ ptrSize) one slot for "interface-table-ptr"
87 return $ (+ ptrSize) $ fromIntegral $ ciMethodMap ci M.! method
89 getMethodTable :: B.ByteString -> IO Word32
90 getMethodTable path = do
91 ci <- getClassInfo path
92 return $ ciMethodBase ci
94 getObjectSize :: B.ByteString -> IO Word32
95 getObjectSize path = do
96 ci <- getClassInfo path
97 -- TODO(bernhard): correct sizes for different types...
98 let fsize = fromIntegral $ M.size $ ciFieldMap ci
99 -- one slot for "method-table-ptr"
100 return $ (1 + fsize) * ptrSize
102 getStaticFieldAddr :: CPtrdiff -> IO CPtrdiff
103 getStaticFieldAddr from = do
104 trapmap <- getTrapMap
105 let w32_from = fromIntegral from
106 let sfi = trapmap M.! w32_from
107 setTrapMap $ M.delete w32_from trapmap
109 (StaticField (StaticFieldInfo cls field)) -> getStaticFieldOffset cls field
110 _ -> error "getFieldAddr: no TrapCause found. abort"
112 -- interface + method + signature plz!
113 getInterfaceMethodOffset :: B.ByteString -> B.ByteString -> B.ByteString -> IO Word32
114 getInterfaceMethodOffset ifname meth sig = do
116 ifmmap <- getInterfaceMethodMap
117 let k = ifname `B.append` meth `B.append` sig
118 case M.lookup k ifmmap of
119 Just w32 -> return $ w32 + 4
120 Nothing -> error "getInterfaceMethodOffset: no offset set"
123 readClass :: B.ByteString -> IO ClassInfo
125 class_map' <- getClassMap
126 case M.lookup path class_map' of
129 cfile <- readClassFile $ toString path
133 -- load all interfaces, which are implemented by this class
134 sequence_ [ loadInterface i | i <- interfaces cfile ]
135 superclass <- if path /= "java/lang/Object"
137 sc <- readClass $ superClass cfile
141 (staticmap, fieldmap) <- calculateFields cfile superclass
142 (methodmap, mbase) <- calculateMethodMap cfile superclass
143 immap <- getInterfaceMethodMap
145 -- allocate interface offset table for this class
146 -- TODO(bernhard): we have some duplicates in immap (i.e. some
147 -- entries have the same offset), so we could
148 -- save some memory here.
149 iftable <- mallocClassData ((4*) $ M.size immap)
150 let w32_iftable = fromIntegral $ ptrToIntPtr iftable :: Word32
151 -- store interface-table at offset 0 in method-table
152 pokeElemOff (intPtrToPtr $ fromIntegral mbase) 0 w32_iftable
153 printfCp "staticmap: %s @ %s\n" (show staticmap) (toString path)
154 printfCp "fieldmap: %s @ %s\n" (show fieldmap) (toString path)
155 printfCp "methodmap: %s @ %s\n" (show methodmap) (toString path)
156 printfCp "mbase: 0x%08x\n" mbase
157 printfCp "interfacemethod: %s @ %s\n" (show immap) (toString path)
158 printfCp "iftable: 0x%08x\n" w32_iftable
159 virtual_map <- getVirtualMap
160 setVirtualMap $ M.insert mbase path virtual_map
162 class_map <- getClassMap
163 let new_ci = ClassInfo path cfile staticmap fieldmap methodmap mbase False
164 setClassMap $ M.insert path new_ci class_map
168 loadInterface :: B.ByteString -> IO ()
169 loadInterface path = do
170 imap <- getInterfaceMap
171 -- interface already loaded?
172 case M.lookup path imap of
175 printfCp "interface: loading \"%s\"\n" $ toString path
176 cfile <- readClassFile $ toString path
177 -- load "superinterfaces" first
178 sequence_ [ loadInterface i | i <- interfaces cfile ]
179 immap <- getInterfaceMethodMap
181 -- load map again, because there could be new entries now
182 -- due to loading superinterfaces
183 imap' <- getInterfaceMap
184 let max_off = fromIntegral $ M.size immap * 4
185 -- create index of methods by this interface
186 let mm = zipbase max_off (classMethods cfile)
188 -- create for each method from *every* superinterface a entry to,
189 -- but just put in the same offset as it is already in the map
190 let (ifnames, methodnames) = unzip $ concat
191 [ zip (repeat ifname) (classMethods $ imap' M.! ifname)
192 | ifname <- interfaces cfile ]
193 let sm = zipWith (\x y -> (entry y, immap M.! getname x y)) ifnames methodnames
195 -- merge all offset tables
196 setInterfaceMethodMap $ M.fromList sm `M.union` M.fromList mm `M.union` immap
197 setInterfaceMap $ M.insert path cfile imap'
199 zipbase base = zipWith (\x y -> (entry y, x + base)) [0,4..]
201 getname p y = p `B.append` methodName y `B.append` encode (methodSignature y)
204 calculateFields :: Class Direct -> Maybe ClassInfo -> IO (FieldMap, FieldMap)
205 calculateFields cf superclass = do
206 -- TODO(bernhard): correct sizes. int only atm
208 let (sfields, ifields) = partition (S.member ACC_STATIC . fieldAccessFlags) (classFields cf)
210 let sc_sm = getsupermap superclass ciStaticMap
211 staticbase <- mallocClassData $ fromIntegral (length sfields) * 4
212 let sm = zipbase (fromIntegral $ ptrToIntPtr staticbase) sfields
213 -- new fields "overwrite" old ones, if they have the same name
214 let staticmap = sm `M.union` sc_sm
216 let sc_im = getsupermap superclass ciFieldMap
217 -- "+ 4" for the method table pointer
218 let max_off = (4+) $ fromIntegral $ M.size sc_im * 4
219 let im = zipbase max_off ifields
220 -- new fields "overwrite" old ones, if they have the same name
221 let fieldmap = im `M.union` sc_im
223 return (staticmap, fieldmap)
225 zipbase :: Int32 -> [Field Direct] -> FieldMap
226 zipbase base = foldr (\(x,y) -> M.insert (fieldName y) (x + base)) M.empty . zip [0,4..]
229 getsupermap :: Maybe ClassInfo -> (ClassInfo -> FieldMap) -> FieldMap
230 getsupermap superclass getter = case superclass of Just x -> getter x; Nothing -> M.empty
233 calculateMethodMap :: Class Direct -> Maybe ClassInfo -> IO (FieldMap, Word32)
234 calculateMethodMap cf superclass = do
236 (\x -> (not . S.member ACC_STATIC . methodAccessFlags) x &&
237 ((/=) "<init>" . methodName) x)
239 let sc_mm = getsupermap superclass ciMethodMap
240 let max_off = fromIntegral $ M.size sc_mm * 4
241 let mm = zipbase max_off methods
242 let methodmap = M.fromList mm `M.union` sc_mm
244 -- (+1): one slot for the interface-table-ptr
245 methodbase <- mallocClassData (((+1) $ fromIntegral $ M.size methodmap) * 4)
246 return (methodmap, fromIntegral $ ptrToIntPtr methodbase)
247 where zipbase base = zipWith (\x y -> (entry y, x + base)) [0,4..]
248 where entry y = methodName y `B.append` encode (methodSignature y)
251 loadAndInitClass :: B.ByteString -> IO ClassInfo
252 loadAndInitClass path = do
253 class_map <- getClassMap
254 ci <- case M.lookup path class_map of
255 Nothing -> readClass path
258 -- first try to execute class initializer of superclass
259 when (path /= "java/lang/Object") (void $ loadAndInitClass $ superClass $ ciFile ci)
261 -- execute class initializer
262 case lookupMethod "<clinit>" (ciFile ci) of
264 rawmethod <- parseMethod (ciFile ci) "<clinit>" $ MethodSignature [] ReturnsVoid
265 let mi = MethodInfo "<clinit>" path (methodSignature m)
266 entry <- compileBB rawmethod mi
267 addMethodRef entry mi [path]
268 printfCp "executing static initializer from %s now\n" (toString path)
270 printfCp "static initializer from %s done\n" (toString path)
273 class_map' <- getClassMap
274 let new_ci = ci { ciInitDone = True }
275 setClassMap $ M.insert path new_ci class_map'
279 readClassFile :: String -> IO (Class Direct)
280 readClassFile path' = readIORef classPaths >>= rcf
282 path = replace "." "/" path'
283 rcf :: [MClassPath] -> IO (Class Direct)
284 rcf [] = error $ "readClassFile: Class \"" ++ show path ++ "\" not found."
285 rcf (Directory pre:xs) = do
286 let cf = pre ++ path ++ ".class"
287 printfCp "rcf: searching @ %s for %s\n" (show pre) (show path)
288 b <- doesFileExist cf
290 then parseClassFile cf
293 printfCp "rcf: searching %s in JAR\n" (show path)
294 entry <- getEntry p path
296 Just (LoadedJAR _ cls) -> return cls
298 _ -> error $ "readClassFile: Class \"" ++ show path ++ "\" in JAR not found. #1"
304 classPaths :: IORef [MClassPath]
305 {-# NOINLINE classPaths #-}
306 classPaths = unsafePerformIO $ newIORef []
308 addClassPath :: String -> IO ()
310 cps <- readIORef classPaths
311 writeIORef classPaths (Directory x:cps)
313 addClassPathJAR :: String -> IO ()
314 addClassPathJAR x = do
315 cps <- readIORef classPaths
316 t <- execClassPath $ addJAR x
317 writeIORef classPaths (JAR t:cps)