2 {-# LANGUAGE OverloadedStrings #-}
3 {-# LANGUAGE ForeignFunctionInterface #-}
5 module Mate.ClassPool (
13 getInterfaceMethodOffset
19 import qualified Data.Map as M
20 import qualified Data.Set as S
21 import qualified Data.ByteString.Lazy as B
32 import Foreign.C.Types
33 import Foreign.Storable
38 import Mate.BasicBlocks
39 import {-# SOURCE #-} Mate.MethodPool
43 import Mate.GarbageAlloc
45 getClassInfo :: B.ByteString -> IO ClassInfo
46 getClassInfo path = do
47 class_map <- get_classmap >>= ptr2classmap
48 case M.lookup path class_map of
49 Nothing -> loadAndInitClass path
52 getClassFile :: B.ByteString -> IO (Class Resolved)
53 getClassFile path = do
54 ci <- getClassInfo path
57 getStaticFieldOffset :: B.ByteString -> B.ByteString -> IO (CUInt)
58 getStaticFieldOffset path field = do
59 ci <- getClassInfo path
60 return $ fromIntegral $ (ciStaticMap ci) M.! field
62 getFieldOffset :: B.ByteString -> B.ByteString -> IO (Int32)
63 getFieldOffset path field = do
64 ci <- getClassInfo path
65 return $ (ciFieldMap ci) M.! field
67 -- method + signature plz!
68 getMethodOffset :: B.ByteString -> B.ByteString -> IO (Word32)
69 getMethodOffset path method = do
70 ci <- getClassInfo path
71 -- (4+) one slot for "interface-table-ptr"
72 return $ (+4) $ fromIntegral $ (ciMethodMap ci) M.! method
74 getMethodTable :: B.ByteString -> IO (Word32)
75 getMethodTable path = do
76 ci <- getClassInfo path
77 return $ ciMethodBase ci
79 getObjectSize :: B.ByteString -> IO (Word32)
80 getObjectSize path = do
81 ci <- getClassInfo path
82 -- TODO(bernhard): correct sizes for different types...
83 let fsize = fromIntegral $ M.size $ ciFieldMap ci
84 -- one slot for "method-table-ptr"
85 return $ (1 + fsize) * 4
87 foreign export ccall getStaticFieldAddr :: CUInt -> Ptr () -> IO CUInt
88 getStaticFieldAddr :: CUInt -> Ptr () -> IO CUInt
89 getStaticFieldAddr from ptr_trapmap = do
90 trapmap <- ptr2trapmap ptr_trapmap
91 let w32_from = fromIntegral from
92 let sfi = trapmap M.! w32_from
94 (SFI (StaticFieldInfo cls field)) -> do
95 getStaticFieldOffset cls field
96 _ -> error $ "getFieldAddr: no trapInfo. abort"
98 -- interface + method + signature plz!
99 getInterfaceMethodOffset :: B.ByteString -> B.ByteString -> B.ByteString -> IO (Word32)
100 getInterfaceMethodOffset ifname meth sig = do
102 ifmmap <- get_interfacemethodmap >>= ptr2interfacemethodmap
103 let k = ifname `B.append` meth `B.append` sig
104 case M.lookup k ifmmap of
105 Just w32 -> return $ (+4) w32
106 Nothing -> error $ "getInterfaceMethodOffset: no offset set"
109 loadClass :: B.ByteString -> IO ClassInfo
111 let rpath = toString $ path `B.append` ".class"
112 cfile <- parseClassFile rpath
116 -- load all interfaces, which are implemented by this class
117 sequence_ [ loadInterface i | i <- interfaces cfile ]
118 superclass <- case (path /= "java/lang/Object") of
120 sc <- loadClass $ superClass cfile
122 False -> return $ Nothing
124 (staticmap, fieldmap) <- calculateFields cfile superclass
125 (methodmap, mbase) <- calculateMethodMap cfile superclass
126 immap <- get_interfacemethodmap >>= ptr2interfacemethodmap
128 -- allocate interface offset table for this class
129 -- TODO(bernhard): we have some duplicates in immap (i.e. some
130 -- entries have the same offset), so we could
131 -- save some memory here.
132 iftable <- mallocClassData ((4*) $ M.size immap)
133 let w32_iftable = fromIntegral $ ptrToIntPtr iftable :: Word32
134 -- store interface-table at offset 0 in method-table
135 pokeElemOff (intPtrToPtr $ fromIntegral mbase) 0 w32_iftable
136 printf_cp "staticmap: %s @ %s\n" (show staticmap) (toString path)
137 printf_cp "fieldmap: %s @ %s\n" (show fieldmap) (toString path)
138 printf_cp "methodmap: %s @ %s\n" (show methodmap) (toString path)
139 printf_cp "mbase: 0x%08x\n" mbase
140 printf_cp "interfacemethod: %s @ %s\n" (show immap) (toString path)
141 printf_cp "iftable: 0x%08x\n" w32_iftable
142 virtual_map <- get_virtualmap >>= ptr2virtualmap
143 let virtual_map' = M.insert mbase path virtual_map
144 virtualmap2ptr virtual_map' >>= set_virtualmap
146 class_map <- get_classmap >>= ptr2classmap
147 let new_ci = ClassInfo path cfile staticmap fieldmap methodmap mbase False
148 let class_map' = M.insert path new_ci class_map
149 classmap2ptr class_map' >>= set_classmap
153 loadInterface :: B.ByteString -> IO ()
154 loadInterface path = do
155 imap <- get_interfacesmap >>= ptr2interfacesmap
156 -- interface already loaded?
157 case M.lookup path imap of
160 printf_cp "interface: loading \"%s\"\n" $ toString path
161 let ifpath = toString $ path `B.append` ".class"
162 cfile <- parseClassFile ifpath
163 -- load "superinterfaces" first
164 sequence_ [ loadInterface i | i <- interfaces cfile ]
165 immap <- get_interfacemethodmap >>= ptr2interfacemethodmap
167 -- load map again, because there could be new entries now
168 -- due to loading superinterfaces
169 imap' <- get_interfacesmap >>= ptr2interfacesmap
170 let max_off = fromIntegral $ (M.size immap) * 4
171 -- create index of methods by this interface
172 let mm = zipbase max_off (classMethods cfile)
174 -- create for each method from *every* superinterface a entry to,
175 -- but just put in the same offset as it is already in the map
176 let (ifnames, methodnames) = unzip $ concat $
177 [ zip (repeat ifname) (classMethods $ imap' M.! ifname)
178 | ifname <- interfaces cfile ]
179 let sm = zipWith (\x y -> (entry y, immap M.! (getname x y))) ifnames methodnames
181 -- merge all offset tables
182 let methodmap = (M.fromList sm) `M.union` (M.fromList mm) `M.union` immap
183 interfacemethodmap2ptr methodmap >>= set_interfacemethodmap
185 interfacesmap2ptr (M.insert path cfile imap') >>= set_interfacesmap
187 zipbase base = zipWith (\x y -> (entry y, x + base)) [0,4..]
189 getname p y = p `B.append` (methodName y) `B.append` (encode $ methodSignature y)
192 calculateFields :: Class Resolved -> Maybe ClassInfo -> IO (FieldMap, FieldMap)
193 calculateFields cf superclass = do
194 -- TODO(bernhard): correct sizes. int only atm
196 let (sfields, ifields) = span (S.member ACC_STATIC . fieldAccessFlags) (classFields cf)
198 staticbase <- mallocClassData ((fromIntegral $ length sfields) * 4)
199 let i_sb = fromIntegral $ ptrToIntPtr $ staticbase
200 let sm = zipbase i_sb sfields
201 let sc_sm = getsupermap superclass ciStaticMap
202 -- new fields "overwrite" old ones, if they have the same name
203 let staticmap = (M.fromList sm) `M.union` sc_sm
205 let sc_im = getsupermap superclass ciFieldMap
206 -- "+ 4" for the method table pointer
207 let max_off = (fromIntegral $ (M.size sc_im) * 4) + 4
208 let im = zipbase max_off ifields
209 -- new fields "overwrite" old ones, if they have the same name
210 let fieldmap = (M.fromList im) `M.union` sc_im
212 return (staticmap, fieldmap)
214 zipbase base = zipWith (\x y -> (fieldName y, x + base)) [0,4..]
217 getsupermap :: Maybe ClassInfo -> (ClassInfo -> FieldMap) -> FieldMap
218 getsupermap superclass getter = case superclass of Just x -> getter x; Nothing -> M.empty
221 calculateMethodMap :: Class Resolved -> Maybe ClassInfo -> IO (FieldMap, Word32)
222 calculateMethodMap cf superclass = do
224 (\x -> (not . S.member ACC_STATIC . methodAccessFlags) x &&
225 ((/=) "<init>" . methodName) x)
227 let sc_mm = getsupermap superclass ciMethodMap
228 let max_off = fromIntegral $ (M.size sc_mm) * 4
229 let mm = zipbase max_off methods
230 let methodmap = (M.fromList mm) `M.union` sc_mm
232 -- (+1): one slot for the interface-table-ptr
233 methodbase <- mallocClassData (((+1) $ fromIntegral $ M.size methodmap) * 4)
234 return (methodmap, fromIntegral $ ptrToIntPtr $ methodbase)
235 where zipbase base = zipWith (\x y -> (entry y, x + base)) [0,4..]
236 where entry y = (methodName y) `B.append` (encode $ methodSignature y)
239 loadAndInitClass :: B.ByteString -> IO ClassInfo
240 loadAndInitClass path = do
241 class_map <- get_classmap >>= ptr2classmap
242 ci <- case M.lookup path class_map of
243 Nothing -> loadClass path
246 -- first try to execute class initializer of superclass
247 when (path /= "java/lang/Object") ((loadAndInitClass $ superClass $ ciFile ci) >> return ())
249 -- execute class initializer
250 case lookupMethod "<clinit>" (ciFile ci) of
252 hmap <- parseMethod (ciFile ci) "<clinit>"
255 let mi = (MethodInfo "<clinit>" path (methodSignature m))
256 entry <- compileBB hmap' mi
257 addMethodRef entry mi [path]
258 printf_cp "executing static initializer from %s now\n" (toString path)
260 printf_cp "static initializer from %s done\n" (toString path)
261 Nothing -> error $ "loadClass: static initializer not found (WTF?). abort"
264 class_map' <- get_classmap >>= ptr2classmap
265 let new_ci = ci { ciInitDone = True }
266 let class_map'' = M.insert path new_ci class_map'
267 classmap2ptr class_map'' >>= set_classmap