+{-# LANGUAGE CPP #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ForeignFunctionInterface #-}
-module Mate.ClassPool where
+module Mate.ClassPool (
+ getClassInfo,
+ getClassFile,
+ getMethodTable,
+ getObjectSize,
+ getMethodOffset,
+ getFieldOffset,
+ getStaticFieldAddr
+ ) where
+import Data.Int
+import Data.Word
import Data.Binary
-import Data.String.Utils
import qualified Data.Map as M
import qualified Data.Set as S
import qualified Data.ByteString.Lazy as B
-import System.Plugins
+import Control.Monad
+#ifdef DEBUG
import Text.Printf
+#endif
import Foreign.Ptr
import Foreign.C.Types
-import Foreign.C.String
-import Foreign.StablePtr
import Foreign.Marshal.Alloc
import JVM.ClassFile
import JVM.Converter
-import Harpy
-import Harpy.X86Disassembler
-
import Mate.BasicBlocks
+import {-# SOURCE #-} Mate.MethodPool
import Mate.Types
import Mate.Utilities
+getClassInfo :: B.ByteString -> IO ClassInfo
+getClassInfo path = do
+ class_map <- get_classmap >>= ptr2classmap
+ case M.lookup path class_map of
+ Nothing -> loadAndInitClass path
+ Just ci -> return ci
getClassFile :: B.ByteString -> IO (Class Resolved)
getClassFile path = do
+ ci <- getClassInfo path
+ return $ ciFile ci
+
+getStaticFieldOffset :: B.ByteString -> B.ByteString -> IO (CUInt)
+getStaticFieldOffset path field = do
+ ci <- getClassInfo path
+ return $ fromIntegral $ (ciStaticMap ci) M.! field
+
+getFieldOffset :: B.ByteString -> B.ByteString -> IO (Int32)
+getFieldOffset path field = do
+ ci <- getClassInfo path
+ return $ (ciFieldMap ci) M.! field
+
+-- method + signature plz!
+getMethodOffset :: B.ByteString -> B.ByteString -> IO (Word32)
+getMethodOffset path method = do
+ ci <- getClassInfo path
+ return $ fromIntegral $ (ciMethodMap ci) M.! method
+
+getMethodTable :: B.ByteString -> IO (Word32)
+getMethodTable path = do
+ ci <- getClassInfo path
+ return $ ciMethodBase ci
+
+getObjectSize :: B.ByteString -> IO (Word32)
+getObjectSize path = do
+ ci <- getClassInfo path
+ -- TODO(bernhard): correct sizes for different types...
+ let fsize = fromIntegral $ M.size $ ciFieldMap ci
+ -- one slot for "method-table-ptr"
+ return $ (1 + fsize) * 4
+
+foreign export ccall getStaticFieldAddr :: CUInt -> Ptr () -> IO CUInt
+getStaticFieldAddr :: CUInt -> Ptr () -> IO CUInt
+getStaticFieldAddr from ptr_trapmap = do
+ trapmap <- ptr2trapmap ptr_trapmap
+ let w32_from = fromIntegral from
+ let sfi = trapmap M.! w32_from
+ case sfi of
+ (SFI (StaticFieldInfo cls field)) -> do
+ getStaticFieldOffset cls field
+ _ -> error $ "getFieldAddr: no trapInfo. abort"
+
+loadClass :: B.ByteString -> IO ClassInfo
+loadClass path = do
+#ifdef DEBUG
+ printf "loadClass: \"%s\"\n" $ toString path
+#endif
let rpath = toString $ path `B.append` ".class"
- parseClassFile rpath
+ cfile <- parseClassFile rpath
+ superclass <- case (path /= "java/lang/Object") of
+ True -> do
+ sc <- loadClass $ superClass cfile
+ return $ Just $ sc
+ False -> return $ Nothing
+
+ (staticmap, fieldmap) <- calculateFields cfile superclass
+ (methodmap, mbase) <- calculateMethodMap cfile superclass
+#ifdef DEBUG
+ printf "staticmap: %s @ %s\n" (show staticmap) (toString path)
+ printf "fieldmap: %s @ %s\n" (show fieldmap) (toString path)
+ printf "methodmap: %s @ %s\n" (show methodmap) (toString path)
+ printf "mbase: 0x%08x\n" mbase
+#endif
+
+ virtual_map <- get_virtualmap >>= ptr2virtualmap
+ let virtual_map' = M.insert mbase path virtual_map
+ virtualmap2ptr virtual_map' >>= set_virtualmap
+
+ class_map <- get_classmap >>= ptr2classmap
+ 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 ciStaticMap
+ -- 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 ciFieldMap
+ -- "+ 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 ciMethodMap
+ 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 $ ciFile ci) >> return ())
+
+ -- execute class initializer
+ case lookupMethod "<clinit>" (ciFile ci) of
+ Just m -> do
+ hmap <- parseMethod (ciFile ci) "<clinit>"
+ case hmap of
+ Just hmap' -> do
+ let mi = (MethodInfo "<clinit>" path (methodSignature m))
+ entry <- compileBB hmap' mi
+ addMethodRef entry mi [path]
+#ifdef DEBUG
+ printf "executing static initializer from %s now\n" (toString path)
+#endif
+ executeFuncPtr entry
+#ifdef DEBUG
+ printf "static initializer from %s done\n" (toString path)
+#endif
+ Nothing -> error $ "loadClass: static initializer not found (WTF?). abort"
+ Nothing -> return ()
+
+ class_map' <- get_classmap >>= ptr2classmap
+ let new_ci = ci { ciInitDone = True }
+ let class_map'' = M.insert path new_ci class_map'
+ classmap2ptr class_map'' >>= set_classmap
+ return new_ci