{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ForeignFunctionInterface #-}
-module Mate.ClassPool where
+module Mate.ClassPool (
+ getClassInfo,
+ getClassFile,
+ getMethodTable,
+ getMethodSize,
+ getMethodOffset,
+ getFieldOffset,
+ getStaticFieldAddr
+ ) where
+import Data.Int
+import Data.Word
+import Data.Binary
import qualified Data.Map as M
import qualified Data.Set as S
import qualified Data.ByteString.Lazy as B
+import Control.Monad
import Text.Printf
getClassInfo :: B.ByteString -> IO ClassInfo
getClassInfo path = do
- ptr_classmap <- get_classmap
- class_map <- ptr2classmap ptr_classmap
+ class_map <- get_classmap >>= ptr2classmap
case M.lookup path class_map of
- Nothing -> loadClass path
+ Nothing -> loadAndInitClass path
Just ci -> return ci
getClassFile :: B.ByteString -> IO (Class Resolved)
getClassFile path = do
- (ClassInfo _ cfile _ _) <- getClassInfo path
- return cfile
+ ci <- getClassInfo path
+ return $ clFile ci
--- TODO(bernhard): I think we don't need that anymore. also remove fieldbase
--- entry in ClassInfo
-getFieldBase :: B.ByteString -> IO (CUInt)
-getFieldBase path = do
- (ClassInfo _ _ fs _) <- getClassInfo path
- return $ fromIntegral $ ptrToIntPtr fs
+getStaticFieldOffset :: B.ByteString -> B.ByteString -> IO (CUInt)
+getStaticFieldOffset path field = do
+ ci <- getClassInfo path
+ return $ fromIntegral $ (clStaticMap ci) M.! field
-getFieldOffset :: B.ByteString -> B.ByteString -> IO (CUInt)
+getFieldOffset :: B.ByteString -> B.ByteString -> IO (Int32)
getFieldOffset path field = do
- (ClassInfo _ _ _ fieldmap) <- getClassInfo path
- return $ fromIntegral $ fieldmap M.! field
+ ci <- getClassInfo path
+ return $ (clFieldMap ci) M.! field
+
+-- method + signature plz!
+getMethodOffset :: B.ByteString -> B.ByteString -> IO (Word32)
+getMethodOffset path method = do
+ ci <- getClassInfo path
+ return $ fromIntegral $ (clMethodMap ci) M.! method
+
+getMethodTable :: B.ByteString -> IO (Word32)
+getMethodTable path = do
+ ci <- getClassInfo path
+ return $ clMethodBase ci
-foreign export ccall getFieldAddr :: CUInt -> Ptr () -> IO CUInt
-getFieldAddr :: CUInt -> Ptr () -> IO CUInt
-getFieldAddr from ptr_trapmap = do
+getMethodSize :: B.ByteString -> IO (Word32)
+getMethodSize path = do
+ ci <- getClassInfo path
+ -- TODO(bernhard): correct sizes for different types...
+ let msize = fromIntegral $ M.size $ clMethodMap ci
+ return $ (1 + msize) * 4
+
+foreign export ccall getStaticFieldAddr :: CUInt -> Ptr () -> IO CUInt
+getStaticFieldAddr :: CUInt -> Ptr () -> IO CUInt
+getStaticFieldAddr from ptr_trapmap = do
trapmap <- ptr2tmap ptr_trapmap
let w32_from = fromIntegral from
let sfi = trapmap M.! w32_from
case sfi of
(SFI (StaticFieldInfo cls field)) -> do
- getFieldOffset cls field
+ getStaticFieldOffset cls field
_ -> error $ "getFieldAddr: no trapInfo. abort"
loadClass :: B.ByteString -> IO ClassInfo
sc <- loadClass $ superClass cfile
return $ Just $ sc
False -> return $ Nothing
+
+ (staticmap, fieldmap) <- calculateFields cfile superclass
+ printf "staticmap: %s @ %s\n" (show staticmap) (toString path)
+ printf "fieldmap: %s @ %s\n" (show fieldmap) (toString path)
+ (methodmap, mbase) <- calculateMethodMap cfile superclass
+ printf "methodmap: %s @ %s\n" (show methodmap) (toString path)
+ printf "mbase: 0x%08x\n" mbase
+
+ virtual_map <- get_virtualmap >>= ptr2virtualmap
+ let virtual_map' = M.insert mbase path virtual_map
+ virtualmap2ptr virtual_map' >>= set_virtualmap
+
class_map <- get_classmap >>= ptr2classmap
- -- TODO(bernhard): correct sizes. int only atm
- let filteredfields = filter (S.member ACC_STATIC . fieldAccessFlags) (classFields cfile)
- fieldbase <- mallocBytes ((fromIntegral $ length filteredfields) * 4)
- let i_fb = fromIntegral $ ptrToIntPtr $ fieldbase
- let fm = zipWith (\x y -> (fieldName y, x + i_fb)) [0,4..] filteredfields
- let sc_fm = case superclass of Just x -> clFieldMap x; Nothing -> M.empty
- -- new fields "overwrite" old ones, if they have the same name
- let fieldmap = (M.fromList fm) `M.union` sc_fm
- printf "fieldmap: %s @ %s\n" (show fieldmap) (toString path)
- let new_ci = ClassInfo path cfile fieldbase fieldmap
+ let new_ci = ClassInfo path cfile staticmap fieldmap methodmap mbase False
let class_map' = M.insert path new_ci class_map
classmap2ptr class_map' >>= set_classmap
+ return new_ci
+
+
+calculateFields :: Class Resolved -> Maybe ClassInfo -> IO (FieldMap, FieldMap)
+calculateFields cf superclass = do
+ -- TODO(bernhard): correct sizes. int only atm
+
+ let (sfields, ifields) = span (S.member ACC_STATIC . fieldAccessFlags) (classFields cf)
+
+ staticbase <- mallocBytes ((fromIntegral $ length sfields) * 4)
+ let i_sb = fromIntegral $ ptrToIntPtr $ staticbase
+ let sm = zipbase i_sb sfields
+ let sc_sm = getsupermap superclass clStaticMap
+ -- new fields "overwrite" old ones, if they have the same name
+ let staticmap = (M.fromList sm) `M.union` sc_sm
+
+ let sc_im = getsupermap superclass clFieldMap
+ -- "+ 4" for the method table pointer
+ let max_off = (fromIntegral $ (M.size sc_im) * 4) + 4
+ let im = zipbase max_off ifields
+ -- new fields "overwrite" old ones, if they have the same name
+ let fieldmap = (M.fromList im) `M.union` sc_im
+
+ return (staticmap, fieldmap)
+ where
+ zipbase base = zipWith (\x y -> (fieldName y, x + base)) [0,4..]
+
+-- helper
+getsupermap :: Maybe ClassInfo -> (ClassInfo -> FieldMap) -> FieldMap
+getsupermap superclass getter = case superclass of Just x -> getter x; Nothing -> M.empty
+
+
+calculateMethodMap :: Class Resolved -> Maybe ClassInfo -> IO (FieldMap, Word32)
+calculateMethodMap cf superclass = do
+ let methods = filter
+ (\x -> (not . S.member ACC_STATIC . methodAccessFlags) x &&
+ ((/=) "<init>" . methodName) x)
+ (classMethods cf)
+ let sc_mm = getsupermap superclass clMethodMap
+ let max_off = fromIntegral $ (M.size sc_mm) * 4
+ let mm = zipbase max_off methods
+ let methodmap = (M.fromList mm) `M.union` sc_mm
+
+ methodbase <- mallocBytes ((fromIntegral $ M.size methodmap) * 4)
+ return (methodmap, fromIntegral $ ptrToIntPtr $ methodbase)
+ where zipbase base = zipWith (\x y -> (entry y, x + base)) [0,4..]
+ where entry y = (methodName y) `B.append` (encode $ methodSignature y)
+
+
+loadAndInitClass :: B.ByteString -> IO ClassInfo
+loadAndInitClass path = do
+ class_map <- get_classmap >>= ptr2classmap
+ ci <- case M.lookup path class_map of
+ Nothing -> loadClass path
+ Just x -> return x
+
+ -- first try to execute class initializer of superclass
+ when (path /= "java/lang/Object") ((loadAndInitClass $ superClass $ clFile ci) >> return ())
+
-- execute class initializer
- case lookupMethod "<clinit>" cfile of
+ case lookupMethod "<clinit>" (clFile ci) of
Just m -> do
- hmap <- parseMethod cfile "<clinit>"
+ hmap <- parseMethod (clFile ci) "<clinit>"
printMapBB hmap
case hmap of
Just hmap' -> do
printf "executing static initializer from %s now\n" (toString path)
executeFuncPtr entry
printf "static initializer from %s done\n" (toString path)
- return new_ci
Nothing -> error $ "loadClass: static initializer not found (WTF?). abort"
- Nothing -> return new_ci
+ Nothing -> return ()
+
+ class_map' <- get_classmap >>= ptr2classmap
+ let new_ci = ci { clInitDone = True }
+ let class_map'' = M.insert path new_ci class_map'
+ classmap2ptr class_map'' >>= set_classmap
+ return new_ci
projects / mate.git / blobdiff