+{-# 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 Data.List
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
+ setTrapMap $ M.delete w32_from trapmap
+ case sfi of
+ (StaticField (StaticFieldInfo cls field)) -> getStaticFieldOffset cls field
+ _ -> error "getFieldAddr: no TrapCause found. 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
+
+ let (sfields, ifields) = partition (S.member ACC_STATIC . fieldAccessFlags) (classFields cf)
+
+ let sc_sm = getsupermap superclass ciStaticMap
+ staticbase <- mallocClassData $ fromIntegral (length sfields) * 4
+ let sm = zipbase (fromIntegral $ ptrToIntPtr staticbase) sfields
+ -- new fields "overwrite" old ones, if they have the same name
+ let staticmap = 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 = im `M.union` sc_im
+
+ return (staticmap, fieldmap)
+ where
+ zipbase :: Int32 -> [Field Direct] -> FieldMap
+ zipbase base = foldr (\(x,y) -> M.insert (fieldName y) (x + base)) M.empty . zip [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 &&
+ ((/=) "<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
+
+ -- (+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 "<clinit>" (ciFile ci) of
+ Just m -> do
+ method <- parseMethod (ciFile ci) "<clinit>" $ MethodSignature [] ReturnsVoid
+ case method of
+ Just rawmethod -> do
+ let mi = MethodInfo "<clinit>" path (methodSignature m)
+ entry <- compileBB rawmethod 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)
projects / mate.git / blobdiff