{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ForeignFunctionInterface #-}
-module Mate.ClassPool where
+module Mate.ClassPool (
+ getClassInfo,
+ getClassFile,
+ getFieldOffset,
+ getStaticFieldAddr
+ ) where
+import Data.Int
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
import JVM.ClassFile
import JVM.Converter
+import Mate.BasicBlocks
+import {-# SOURCE #-} Mate.MethodPool
import Mate.Types
+import Mate.Utilities
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
-foreign export ccall getFieldAddr :: CUInt -> Ptr () -> IO CUInt
-getFieldAddr :: CUInt -> Ptr () -> IO CUInt
-getFieldAddr from ptr_trapmap = do
+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)
+
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 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 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 clFieldMap
+ -- TODO(bernhard): not efficient :-(
+ let max_off = if (M.size sc_im) > 0 then maximum $ M.elems sc_im else 0
+ let im = zipbase (max_off + 4) 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..]
+ getsupermap getter = case superclass of Just x -> getter x; Nothing -> M.empty
+
+
+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>" (clFile ci) of
+ Just m -> do
+ hmap <- parseMethod (clFile ci) "<clinit>"
+ printMapBB hmap
+ case hmap of
+ Just hmap' -> do
+ let mi = (MethodInfo "<clinit>" path (methodSignature m))
+ entry <- compileBB hmap' mi
+ addMethodRef entry mi [path]
+ printf "executing static initializer from %s now\n" (toString path)
+ executeFuncPtr entry
+ printf "static initializer from %s done\n" (toString path)
+ Nothing -> error $ "loadClass: static initializer not found (WTF?). abort"
+ 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