+{-# LANGUAGE CPP #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ForeignFunctionInterface #-}
-module Mate.ClassPool where
+#include "debug.h"
+module Mate.ClassPool (
+ getClassInfo,
+ getClassFile,
+ getMethodTable,
+ getObjectSize,
+ getMethodOffset,
+ getFieldOffset,
+ getStaticFieldAddr,
+ getInterfaceMethodOffset
+ ) 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
+#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 JVM.ClassFile
import JVM.Converter
-import Harpy
-import Harpy.X86Disassembler
-
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 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"
+
+
+loadClass :: B.ByteString -> IO ClassInfo
+loadClass path = do
+ let rpath = toString $ path `B.append` ".class"
+ cfile <- parseClassFile rpath
+#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 <- loadClass $ 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
- 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
+ printfCp "interface: loading \"%s\"\n" $ toString path
+ let ifpath = toString $ path `B.append` ".class"
+ cfile <- parseClassFile ifpath
+ -- 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 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 <- 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 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
+
+ -- (+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 -> loadClass 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
+ 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]
+ printfCp "executing static initializer from %s now\n" (toString path)
+ executeFuncPtr entry
+ printfCp "static initializer from %s done\n" (toString path)
+ Nothing -> error "loadClass: 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