X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=Mate%2FClassPool.hs;h=0f1828981f1af5c4c23c4132132ff592656ff011;hb=1315c607541c6fe37830242dfca042e60a2b6eb0;hp=ccfe1b3afc7b4bad72e817e09479582cfacc0bc3;hpb=c6a40fefbb30559ca4bf7f14bc37f8006bbc03af;p=mate.git diff --git a/Mate/ClassPool.hs b/Mate/ClassPool.hs index ccfe1b3..0f18289 100644 --- a/Mate/ClassPool.hs +++ b/Mate/ClassPool.hs @@ -1,42 +1,319 @@ +{-# LANGUAGE CPP #-} {-# LANGUAGE OverloadedStrings #-} {-# LANGUAGE ForeignFunctionInterface #-} -module Mate.ClassPool where +#include "debug.h" +module Mate.ClassPool ( + getClassInfo, + getClassFile, + getMethodTable, + getObjectSize, + getMethodOffset, + getFieldOffset, + getStaticFieldAddr, + getInterfaceMethodOffset, + addClassPath, + addClassPathJAR + ) 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 Data.String.Utils +import Control.Monad +#ifdef DEBUG import Text.Printf +#endif +#ifdef DBG_CLASS +import JVM.Dump +#endif import Foreign.Ptr import Foreign.C.Types -import Foreign.C.String -import Foreign.StablePtr -import Foreign.Marshal.Alloc +import Foreign.Storable + +import Data.IORef +import System.IO.Unsafe +import System.Directory import JVM.ClassFile import JVM.Converter - -import Harpy -import Harpy.X86Disassembler +import Java.ClassPath hiding (Directory) +import Java.JAR import Mate.BasicBlocks +import {-# SOURCE #-} Mate.MethodPool import Mate.Types -import Mate.Utilities +import Mate.Debug +import Mate.GarbageAlloc +getClassInfo :: B.ByteString -> IO ClassInfo +getClassInfo path = do + class_map <- getClassMap + case M.lookup path class_map of + Nothing -> loadAndInitClass path + Just ci -> return ci -getClassFile :: B.ByteString -> IO (Class Resolved) +getClassFile :: B.ByteString -> IO (Class Direct) getClassFile path = do - ptr_classmap <- get_classmap - class_map <- ptr2classmap ptr_classmap - case M.lookup path class_map of + 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 + -- (4+) one slot for "interface-table-ptr" + return $ (+4) $ 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 + +getStaticFieldAddr :: CUInt -> IO CUInt +getStaticFieldAddr from = do + trapmap <- getTrapMap + let w32_from = fromIntegral from + let sfi = trapmap M.! w32_from + case sfi of + (SFI (StaticFieldInfo cls field)) -> getStaticFieldOffset cls field + _ -> error "getFieldAddr: no trapInfo. abort" + +-- interface + method + signature plz! +getInterfaceMethodOffset :: B.ByteString -> B.ByteString -> B.ByteString -> IO Word32 +getInterfaceMethodOffset ifname meth sig = do + loadInterface ifname + ifmmap <- getInterfaceMethodMap + let k = ifname `B.append` meth `B.append` sig + case M.lookup k ifmmap of + Just w32 -> return $ w32 + 4 + Nothing -> error "getInterfaceMethodOffset: no offset set" + + +readClass :: B.ByteString -> IO ClassInfo +readClass path = do + class_map' <- getClassMap + case M.lookup path class_map' of + Just cm -> return cm Nothing -> do - let rpath = toString $ path `B.append` ".class" - cfile <- parseClassFile rpath - let class_map' = M.insert path (ClassInfo path cfile) class_map - classmap2ptr class_map' >>= set_classmap - return cfile - Just (ClassInfo name cfs) -> return cfs + cfile <- readClassFile $ toString path +#ifdef DBG_CLASS + dumpClass cfile +#endif + -- load all interfaces, which are implemented by this class + sequence_ [ loadInterface i | i <- interfaces cfile ] + superclass <- if path /= "java/lang/Object" + then do + sc <- readClass $ superClass cfile + return $ Just sc + else return Nothing + + (staticmap, fieldmap) <- calculateFields cfile superclass + (methodmap, mbase) <- calculateMethodMap cfile superclass + immap <- getInterfaceMethodMap + + -- allocate interface offset table for this class + -- TODO(bernhard): we have some duplicates in immap (i.e. some + -- entries have the same offset), so we could + -- save some memory here. + iftable <- mallocClassData ((4*) $ M.size immap) + let w32_iftable = fromIntegral $ ptrToIntPtr iftable :: Word32 + -- store interface-table at offset 0 in method-table + pokeElemOff (intPtrToPtr $ fromIntegral mbase) 0 w32_iftable + printfCp "staticmap: %s @ %s\n" (show staticmap) (toString path) + printfCp "fieldmap: %s @ %s\n" (show fieldmap) (toString path) + printfCp "methodmap: %s @ %s\n" (show methodmap) (toString path) + printfCp "mbase: 0x%08x\n" mbase + printfCp "interfacemethod: %s @ %s\n" (show immap) (toString path) + printfCp "iftable: 0x%08x\n" w32_iftable + virtual_map <- getVirtualMap + setVirtualMap $ M.insert mbase path virtual_map + + class_map <- getClassMap + let new_ci = ClassInfo path cfile staticmap fieldmap methodmap mbase False + setClassMap $ M.insert path new_ci class_map + return new_ci + + +loadInterface :: B.ByteString -> IO () +loadInterface path = do + imap <- getInterfaceMap + -- interface already loaded? + case M.lookup path imap of + Just _ -> return () + Nothing -> do + printfCp "interface: loading \"%s\"\n" $ toString path + cfile <- readClassFile $ toString path + -- load "superinterfaces" first + sequence_ [ loadInterface i | i <- interfaces cfile ] + immap <- getInterfaceMethodMap + + -- load map again, because there could be new entries now + -- due to loading superinterfaces + imap' <- getInterfaceMap + let max_off = fromIntegral $ M.size immap * 4 + -- create index of methods by this interface + let mm = zipbase max_off (classMethods cfile) + + -- create for each method from *every* superinterface a entry to, + -- but just put in the same offset as it is already in the map + let (ifnames, methodnames) = unzip $ concat + [ zip (repeat ifname) (classMethods $ imap' M.! ifname) + | ifname <- interfaces cfile ] + let sm = zipWith (\x y -> (entry y, immap M.! getname x y)) ifnames methodnames + + -- merge all offset tables + setInterfaceMethodMap $ M.fromList sm `M.union` M.fromList mm `M.union` immap + setInterfaceMap $ M.insert path cfile imap' + where + zipbase base = zipWith (\x y -> (entry y, x + base)) [0,4..] + entry = getname path + getname p y = p `B.append` methodName y `B.append` encode (methodSignature y) + + +calculateFields :: Class Direct -> Maybe ClassInfo -> IO (FieldMap, FieldMap) +calculateFields cf superclass = do + -- TODO(bernhard): correct sizes. int only atm + + -- TODO(bernhard): nicer replacement for `myspan' + let (sfields, ifields) = myspan (S.member ACC_STATIC . fieldAccessFlags) (classFields cf) + myspan :: (a -> Bool) -> [a] -> ([a], [a]) + myspan _ [] = ([],[]) + myspan p (x:xs) + | p x = (x:ns, ni) + | otherwise = (ns, x:ni) + where (ns,ni) = myspan p xs + + staticbase <- mallocClassData $ 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 = (4+) $ fromIntegral $ M.size sc_im * 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 Direct -> Maybe ClassInfo -> IO (FieldMap, Word32) +calculateMethodMap cf superclass = do + let methods = filter + (\x -> (not . S.member ACC_STATIC . methodAccessFlags) x && + ((/=) "" . 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 + + -- (+1): one slot for the interface-table-ptr + methodbase <- mallocClassData (((+1) $ 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 <- getClassMap + ci <- case M.lookup path class_map of + Nothing -> readClass path + Just x -> return x + + -- first try to execute class initializer of superclass + when (path /= "java/lang/Object") (void $ loadAndInitClass $ superClass $ ciFile ci) + + -- execute class initializer + case lookupMethod "" (ciFile ci) of + Just m -> do + hmap <- parseMethod (ciFile ci) "" $ MethodSignature [] ReturnsVoid + case hmap of + Just hmap' -> do + let mi = MethodInfo "" path (methodSignature m) + entry <- compileBB hmap' mi + addMethodRef entry mi [path] + printfCp "executing static initializer from %s now\n" (toString path) + executeFuncPtr entry + printfCp "static initializer from %s done\n" (toString path) + Nothing -> error "readClass: static initializer not found (WTF?). abort" + Nothing -> return () + + class_map' <- getClassMap + let new_ci = ci { ciInitDone = True } + setClassMap $ M.insert path new_ci class_map' + return new_ci + + +readClassFile :: String -> IO (Class Direct) +readClassFile path' = readIORef classPaths >>= rcf + where + path = replace "." "/" path' + rcf :: [MClassPath] -> IO (Class Direct) + rcf [] = error $ "readClassFile: Class \"" ++ (show path) ++ "\" not found." + rcf ((Directory pre):xs) = do + let cf = pre ++ path ++ ".class" + printfCp "rcf: searching @ %s for %s\n" (show pre) (show path) + b <- doesFileExist cf + if b + then parseClassFile cf + else rcf xs + rcf ((JAR p):xs) = do + printfCp "rcf: searching %s in JAR\n" (show path) + entry <- getEntry p path + case entry of + Just (LoadedJAR _ cls) -> return cls + Nothing -> rcf xs + _ -> error $ "readClassFile: Class \"" ++ show path ++ "\" in JAR not found. #1" + +data MClassPath = + Directory String | + JAR [Tree CPEntry] + +classPaths :: IORef [MClassPath] +{-# NOINLINE classPaths #-} +classPaths = unsafePerformIO $ newIORef [] + +addClassPath :: String -> IO () +addClassPath x = do + cps <- readIORef classPaths + writeIORef classPaths (Directory x:cps) + +addClassPathJAR :: String -> IO () +addClassPathJAR x = do + cps <- readIORef classPaths + t <- execClassPath $ addJAR x + writeIORef classPaths (JAR t:cps)