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 <- getClassMap
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 -> IO CUInt
88 getStaticFieldAddr :: CUInt -> IO CUInt
89 getStaticFieldAddr from = do
91 let w32_from = fromIntegral from
92 let sfi = trapmap M.! w32_from
94 (SFI (StaticFieldInfo cls field)) -> getStaticFieldOffset cls field
95 _ -> error "getFieldAddr: no trapInfo. abort"
97 -- interface + method + signature plz!
98 getInterfaceMethodOffset :: B.ByteString -> B.ByteString -> B.ByteString -> IO Word32
99 getInterfaceMethodOffset ifname meth sig = do
101 ifmmap <- getInterfaceMethodMap
102 let k = ifname `B.append` meth `B.append` sig
103 case M.lookup k ifmmap of
104 Just w32 -> return $ w32 + 4
105 Nothing -> error "getInterfaceMethodOffset: no offset set"
108 loadClass :: B.ByteString -> IO ClassInfo
110 let rpath = toString $ path `B.append` ".class"
111 cfile <- parseClassFile rpath
115 -- load all interfaces, which are implemented by this class
116 sequence_ [ loadInterface i | i <- interfaces cfile ]
117 superclass <- if path /= "java/lang/Object"
119 sc <- loadClass $ superClass cfile
123 (staticmap, fieldmap) <- calculateFields cfile superclass
124 (methodmap, mbase) <- calculateMethodMap cfile superclass
125 immap <- getInterfaceMethodMap
127 -- allocate interface offset table for this class
128 -- TODO(bernhard): we have some duplicates in immap (i.e. some
129 -- entries have the same offset), so we could
130 -- save some memory here.
131 iftable <- mallocClassData ((4*) $ M.size immap)
132 let w32_iftable = fromIntegral $ ptrToIntPtr iftable :: Word32
133 -- store interface-table at offset 0 in method-table
134 pokeElemOff (intPtrToPtr $ fromIntegral mbase) 0 w32_iftable
135 printfCp "staticmap: %s @ %s\n" (show staticmap) (toString path)
136 printfCp "fieldmap: %s @ %s\n" (show fieldmap) (toString path)
137 printfCp "methodmap: %s @ %s\n" (show methodmap) (toString path)
138 printfCp "mbase: 0x%08x\n" mbase
139 printfCp "interfacemethod: %s @ %s\n" (show immap) (toString path)
140 printfCp "iftable: 0x%08x\n" w32_iftable
141 virtual_map <- getVirtualMap
142 setVirtualMap $ M.insert mbase path virtual_map
144 class_map <- getClassMap
145 let new_ci = ClassInfo path cfile staticmap fieldmap methodmap mbase False
146 setClassMap $ M.insert path new_ci class_map
150 loadInterface :: B.ByteString -> IO ()
151 loadInterface path = do
152 imap <- getInterfaceMap
153 -- interface already loaded?
154 case M.lookup path imap of
157 printfCp "interface: loading \"%s\"\n" $ toString path
158 let ifpath = toString $ path `B.append` ".class"
159 cfile <- parseClassFile ifpath
160 -- load "superinterfaces" first
161 sequence_ [ loadInterface i | i <- interfaces cfile ]
162 immap <- getInterfaceMethodMap
164 -- load map again, because there could be new entries now
165 -- due to loading superinterfaces
166 imap' <- getInterfaceMap
167 let max_off = fromIntegral $ M.size immap * 4
168 -- create index of methods by this interface
169 let mm = zipbase max_off (classMethods cfile)
171 -- create for each method from *every* superinterface a entry to,
172 -- but just put in the same offset as it is already in the map
173 let (ifnames, methodnames) = unzip $ concat
174 [ zip (repeat ifname) (classMethods $ imap' M.! ifname)
175 | ifname <- interfaces cfile ]
176 let sm = zipWith (\x y -> (entry y, immap M.! getname x y)) ifnames methodnames
178 -- merge all offset tables
179 setInterfaceMethodMap $ M.fromList sm `M.union` M.fromList mm `M.union` immap
180 setInterfaceMap $ M.insert path cfile imap'
182 zipbase base = zipWith (\x y -> (entry y, x + base)) [0,4..]
184 getname p y = p `B.append` methodName y `B.append` encode (methodSignature y)
187 calculateFields :: Class Resolved -> Maybe ClassInfo -> IO (FieldMap, FieldMap)
188 calculateFields cf superclass = do
189 -- TODO(bernhard): correct sizes. int only atm
191 let (sfields, ifields) = span (S.member ACC_STATIC . fieldAccessFlags) (classFields cf)
193 staticbase <- mallocClassData $ fromIntegral (length sfields) * 4
194 let i_sb = fromIntegral $ ptrToIntPtr staticbase
195 let sm = zipbase i_sb sfields
196 let sc_sm = getsupermap superclass ciStaticMap
197 -- new fields "overwrite" old ones, if they have the same name
198 let staticmap = M.fromList sm `M.union` sc_sm
200 let sc_im = getsupermap superclass ciFieldMap
201 -- "+ 4" for the method table pointer
202 let max_off = (4+) $ fromIntegral $ M.size sc_im * 4
203 let im = zipbase max_off ifields
204 -- new fields "overwrite" old ones, if they have the same name
205 let fieldmap = M.fromList im `M.union` sc_im
207 return (staticmap, fieldmap)
209 zipbase base = zipWith (\x y -> (fieldName y, x + base)) [0,4..]
212 getsupermap :: Maybe ClassInfo -> (ClassInfo -> FieldMap) -> FieldMap
213 getsupermap superclass getter = case superclass of Just x -> getter x; Nothing -> M.empty
216 calculateMethodMap :: Class Resolved -> Maybe ClassInfo -> IO (FieldMap, Word32)
217 calculateMethodMap cf superclass = do
219 (\x -> (not . S.member ACC_STATIC . methodAccessFlags) x &&
220 ((/=) "<init>" . methodName) x)
222 let sc_mm = getsupermap superclass ciMethodMap
223 let max_off = fromIntegral $ M.size sc_mm * 4
224 let mm = zipbase max_off methods
225 let methodmap = M.fromList mm `M.union` sc_mm
227 -- (+1): one slot for the interface-table-ptr
228 methodbase <- mallocClassData (((+1) $ fromIntegral $ M.size methodmap) * 4)
229 return (methodmap, fromIntegral $ ptrToIntPtr methodbase)
230 where zipbase base = zipWith (\x y -> (entry y, x + base)) [0,4..]
231 where entry y = methodName y `B.append` encode (methodSignature y)
234 loadAndInitClass :: B.ByteString -> IO ClassInfo
235 loadAndInitClass path = do
236 class_map <- getClassMap
237 ci <- case M.lookup path class_map of
238 Nothing -> loadClass path
241 -- first try to execute class initializer of superclass
242 when (path /= "java/lang/Object") (void $ loadAndInitClass $ superClass $ ciFile ci)
244 -- execute class initializer
245 case lookupMethod "<clinit>" (ciFile ci) of
247 hmap <- parseMethod (ciFile ci) "<clinit>"
250 let mi = MethodInfo "<clinit>" path (methodSignature m)
251 entry <- compileBB hmap' mi
252 addMethodRef entry mi [path]
253 printfCp "executing static initializer from %s now\n" (toString path)
255 printfCp "static initializer from %s done\n" (toString path)
256 Nothing -> error "loadClass: static initializer not found (WTF?). abort"
259 class_map' <- getClassMap
260 let new_ci = ci { ciInitDone = True }
261 setClassMap $ M.insert path new_ci class_map'