X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fghci%2FLinker.lhs;h=6f000c5d7aa2590c75e639b80e464b9faa4f75cb;hp=38d584a633f7cb46a94161c67654573a0f5b8998;hb=17b297d97d327620ed6bfab942f8992b2446f1bf;hpb=cdce647711c0f46f5799b24de087622cb77e647f diff --git a/compiler/ghci/Linker.lhs b/compiler/ghci/Linker.lhs index 38d584a..6f000c5 100644 --- a/compiler/ghci/Linker.lhs +++ b/compiler/ghci/Linker.lhs @@ -14,9 +14,17 @@ necessary. \begin{code} {-# OPTIONS -optc-DNON_POSIX_SOURCE -#include "Linker.h" #-} +{-# OPTIONS_GHC -w #-} +-- The above warning supression flag is a temporary kludge. +-- While working on this module you are encouraged to remove it and fix +-- any warnings in the module. See +-- http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings +-- for details + module Linker ( HValue, getHValue, showLinkerState, - linkExpr, unload, extendLinkEnv, withExtendedLinkEnv, - extendLoadedPkgs, + linkExpr, unload, withExtendedLinkEnv, + extendLinkEnv, deleteFromLinkEnv, + extendLoadedPkgs, linkPackages,initDynLinker, dataConInfoPtrToName ) where @@ -27,7 +35,6 @@ import ObjLink import ByteCodeLink import ByteCodeItbls import ByteCodeAsm -import RtClosureInspect import CgInfoTbls import SMRep import IfaceEnv @@ -55,16 +62,16 @@ import DriverPhases import SrcLoc import UniqSet import Constants +import FastString +import Config ( cProjectVersion ) -- Standard libraries import Control.Monad +import Data.Char import Data.IORef import Data.List -import Foreign.Ptr -import Foreign.C.Types -import Foreign.C.String -import Foreign.Storable +import Foreign import System.IO import System.Directory @@ -145,26 +152,37 @@ extendLinkEnv new_bindings new_pls = pls { closure_env = new_closure_env } writeIORef v_PersistentLinkerState new_pls --- | Given a data constructor, find its internal name. --- The info tables for data constructors have a field which records the source name --- of the constructor as a CString. The format is: +deleteFromLinkEnv :: [Name] -> IO () +deleteFromLinkEnv to_remove + = do pls <- readIORef v_PersistentLinkerState + let new_closure_env = delListFromNameEnv (closure_env pls) to_remove + new_pls = pls { closure_env = new_closure_env } + writeIORef v_PersistentLinkerState new_pls + +-- | Given a data constructor in the heap, find its Name. +-- The info tables for data constructors have a field which records +-- the source name of the constructor as a Ptr Word8 (UTF-8 encoded +-- string). The format is: -- -- Package:Module.Name -- -- We use this string to lookup the interpreter's internal representation of the name -- using the lookupOrig. -dataConInfoPtrToName :: Ptr () -> TcM Name +dataConInfoPtrToName :: Ptr () -> TcM (Either String Name) dataConInfoPtrToName x = do theString <- ioToTcRn $ do let ptr = castPtr x :: Ptr StgInfoTable conDescAddress <- getConDescAddress ptr - str <- peekCString conDescAddress - return str + peekArray0 0 conDescAddress let (pkg, mod, occ) = parse theString - occName = mkOccName OccName.dataName occ - modName = mkModule (stringToPackageId pkg) (mkModuleName mod) - lookupOrig modName occName + pkgFS = mkFastStringByteList pkg + modFS = mkFastStringByteList mod + occFS = mkFastStringByteList occ + occName = mkOccNameFS OccName.dataName occFS + modName = mkModule (fsToPackageId pkgFS) (mkModuleNameFS modFS) + return (Left$ showSDoc$ ppr modName <> dot <> ppr occName ) + `recoverM` (Right `fmap` lookupOrig modName occName) where @@ -208,13 +226,13 @@ dataConInfoPtrToName x = do in the memory location: info_table_ptr + info_table_size -} - getConDescAddress :: Ptr StgInfoTable -> IO (Ptr CChar) + getConDescAddress :: Ptr StgInfoTable -> IO (Ptr Word8) getConDescAddress ptr = do #ifdef GHCI_TABLES_NEXT_TO_CODE offsetToString <- peek $ ptr `plusPtr` (- wORD_SIZE) return $ (ptr `plusPtr` stdInfoTableSizeB) `plusPtr` (fromIntegral (offsetToString :: StgWord)) #else - peek $ intPtrToPtr $ (ptrToIntPtr ptr) + stdInfoTableSizeB + peek $ intPtrToPtr $ (ptrToIntPtr ptr) + fromIntegral stdInfoTableSizeB #endif -- parsing names is a little bit fiddly because we have a string in the form: @@ -224,40 +242,76 @@ dataConInfoPtrToName x = do -- this is not the conventional way of writing Haskell names. We stick with -- convention, even though it makes the parsing code more troublesome. -- Warning: this code assumes that the string is well formed. - parse :: String -> (String, String, String) + parse :: [Word8] -> ([Word8], [Word8], [Word8]) parse input = ASSERT (all (>0) (map length [pkg, mod, occ])) (pkg, mod, occ) where - (pkg, rest1) = break (==':') input + dot = fromIntegral (ord '.') + (pkg, rest1) = break (== fromIntegral (ord ':')) input (mod, occ) - = (concat $ intersperse "." $ reverse modWords, occWord) + = (concat $ intersperse [dot] $ reverse modWords, occWord) where (modWords, occWord) = ASSERT (length rest1 > 0) (parseModOcc [] (tail rest1)) - parseModOcc :: [String] -> String -> ([String], String) + parseModOcc :: [[Word8]] -> [Word8] -> ([[Word8]], [Word8]) parseModOcc acc str - = case break (== '.') str of + = case break (== dot) str of (top, []) -> (acc, top) - (top, '.':bot) -> parseModOcc (top : acc) bot + (top, _:bot) -> parseModOcc (top : acc) bot -getHValue :: Name -> IO (Maybe HValue) -getHValue name = do - pls <- readIORef v_PersistentLinkerState - case lookupNameEnv (closure_env pls) name of - Just (_,x) -> return$ Just x - _ -> return Nothing +getHValue :: HscEnv -> Name -> IO HValue +getHValue hsc_env name = do + when (isExternalName name) $ do + ok <- linkDependencies hsc_env noSrcSpan [nameModule name] + when (failed ok) $ throwDyn (ProgramError "") + pls <- readIORef v_PersistentLinkerState + lookupName (closure_env pls) name + +linkDependencies :: HscEnv -> SrcSpan -> [Module] -> IO SuccessFlag +linkDependencies hsc_env span needed_mods = do + let hpt = hsc_HPT hsc_env + dflags = hsc_dflags hsc_env + -- The interpreter and dynamic linker can only handle object code built + -- the "normal" way, i.e. no non-std ways like profiling or ticky-ticky. + -- So here we check the build tag: if we're building a non-standard way + -- then we need to find & link object files built the "normal" way. + maybe_normal_osuf <- checkNonStdWay dflags span + + -- Find what packages and linkables are required + eps <- readIORef (hsc_EPS hsc_env) + (lnks, pkgs) <- getLinkDeps hsc_env hpt (eps_PIT eps) + maybe_normal_osuf span needed_mods + + -- Link the packages and modules required + linkPackages dflags pkgs + linkModules dflags lnks + + +-- | Temporarily extend the linker state. withExtendedLinkEnv :: [(Name,HValue)] -> IO a -> IO a withExtendedLinkEnv new_env action = bracket set_new_env reset_old_env (const action) - where set_new_env = do pls <- readIORef v_PersistentLinkerState - let new_closure_env = extendClosureEnv (closure_env pls) new_env - new_pls = pls { closure_env = new_closure_env } - writeIORef v_PersistentLinkerState new_pls - return (closure_env pls) - reset_old_env env = modifyIORef v_PersistentLinkerState (\pls -> pls{ closure_env = env }) + where set_new_env = do + pls <- readIORef v_PersistentLinkerState + let new_closure_env = extendClosureEnv (closure_env pls) new_env + new_pls = pls { closure_env = new_closure_env } + writeIORef v_PersistentLinkerState new_pls + return (closure_env pls) + + -- Remember that the linker state might be side-effected + -- during the execution of the IO action, and we don't want to + -- lose those changes (we might have linked a new module or + -- package), so the reset action only removes the names we + -- added earlier. + reset_old_env env = do + modifyIORef v_PersistentLinkerState $ \pls -> + let cur = closure_env pls + new = delListFromNameEnv cur (map fst new_env) + in + pls{ closure_env = new } -- filterNameMap removes from the environment all entries except -- those for a given set of modules; @@ -442,20 +496,8 @@ linkExpr hsc_env span root_ul_bco let dflags = hsc_dflags hsc_env ; initDynLinker dflags - -- The interpreter and dynamic linker can only handle object code built - -- the "normal" way, i.e. no non-std ways like profiling or ticky-ticky. - -- So here we check the build tag: if we're building a non-standard way - -- then we need to find & link object files built the "normal" way. - ; maybe_normal_osuf <- checkNonStdWay dflags span - - -- Find what packages and linkables are required - ; eps <- readIORef (hsc_EPS hsc_env) - ; (lnks, pkgs) <- getLinkDeps hsc_env hpt (eps_PIT eps) - maybe_normal_osuf span needed_mods - -- Link the packages and modules required - ; linkPackages dflags pkgs - ; ok <- linkModules dflags lnks + ; ok <- linkDependencies hsc_env span needed_mods ; if failed ok then throwDyn (ProgramError "") else do { @@ -470,7 +512,6 @@ linkExpr hsc_env span root_ul_bco ; return root_hval }} where - hpt = hsc_HPT hsc_env free_names = nameSetToList (bcoFreeNames root_ul_bco) needed_mods :: [Module] @@ -552,7 +593,7 @@ getLinkDeps hsc_env hpt pit maybe_normal_osuf span mods | mi_boot iface = link_boot_mod_error mod | otherwise - = follow_deps (map (mkModule this_pkg) boot_deps ++ mods) acc_mods' acc_pkgs' + = follow_deps (map (mkModule this_pkg) boot_deps' ++ mods) acc_mods' acc_pkgs' where pkg = modulePackageId mod iface = get_iface mod @@ -1025,6 +1066,9 @@ loadFrameworks pkg = mapM_ load frameworks -- Try to find an object file for a given library in the given paths. -- If it isn't present, we assume it's a dynamic library. +#ifndef __PIC__ +-- When the GHC package was not compiled as dynamic library (=__PIC__ not set), +-- we search for .o libraries first. locateOneObj :: [FilePath] -> String -> IO LibrarySpec locateOneObj dirs lib = do { mb_obj_path <- findFile mk_obj_path dirs @@ -1033,12 +1077,28 @@ locateOneObj dirs lib Nothing -> do { mb_lib_path <- findFile mk_dyn_lib_path dirs ; case mb_lib_path of - Just lib_path -> return (DLL (lib ++ "_dyn")) + Just lib_path -> return (DLL (lib ++ "-ghc" ++ cProjectVersion)) Nothing -> return (DLL lib) }} -- We assume where mk_obj_path dir = dir `joinFileName` (lib `joinFileExt` "o") - mk_dyn_lib_path dir = dir `joinFileName` mkSOName (lib ++ "_dyn") - + mk_dyn_lib_path dir = dir `joinFileName` mkSOName (lib ++ "-ghc" ++ cProjectVersion) +#else +-- When the GHC package was compiled as dynamic library (=__PIC__ set), +-- we search for .so libraries first. +locateOneObj :: [FilePath] -> String -> IO LibrarySpec +locateOneObj dirs lib + = do { mb_lib_path <- findFile mk_dyn_lib_path dirs + ; case mb_lib_path of + Just lib_path -> return (DLL (lib ++ "-ghc" ++ cProjectVersion)) + Nothing -> + do { mb_obj_path <- findFile mk_obj_path dirs + ; case mb_obj_path of + Just obj_path -> return (Object obj_path) + Nothing -> return (DLL lib) }} -- We assume + where + mk_obj_path dir = dir `joinFileName` (lib `joinFileExt` "o") + mk_dyn_lib_path dir = dir `joinFileName` mkSOName (lib ++ "-ghc" ++ cProjectVersion) +#endif -- ---------------------------------------------------------------------------- -- Loading a dyanmic library (dlopen()-ish on Unix, LoadLibrary-ish on Win32)