{-# OPTIONS -#include "Linker.h" -#include "SchedAPI.h" #-}
-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.121 2002/04/24 09:42:18 simonmar Exp $
+-- $Id: InteractiveUI.hs,v 1.122 2002/05/01 15:46:15 simonmar Exp $
--
-- GHC Interactive User Interface
--
-- (c) The GHC Team 2000
--
-----------------------------------------------------------------------------
-module InteractiveUI ( interactiveUI, ghciWelcomeMsg ) where
+module InteractiveUI (
+ interactiveUI, -- :: CmState -> [FilePath] -> [LibrarySpec] -> IO ()
+ LibrarySpec(..),
+ ghciWelcomeMsg
+ ) where
#include "../includes/config.h"
#include "HsVersions.h"
import GlaExts ( unsafeCoerce# )
import Foreign ( nullPtr )
-import CString ( peekCString )
+import CString ( CString, peekCString, withCString )
-----------------------------------------------------------------------------
-- For dynamic objects only, try to find the object file in all the
-- directories specified in v_Library_Paths before giving up.
-type LibrarySpec
- = Either FilePath String
+data LibrarySpec = Object FilePath | DLL String
-showLS (Left nm) = "(static) " ++ nm
-showLS (Right nm) = "(dynamic) " ++ nm
+-- Packages that don't need loading, because the compiler shares them with
+-- the interpreted program.
+dont_load_these = [ "rts" ]
+
+-- Packages that are already linked into GHCi. For mingw32, we only
+-- skip gmp and rts, since std and after need to load the msvcrt.dll
+-- library which std depends on.
+loaded_in_ghci
+# ifndef mingw32_TARGET_OS
+ = [ "std", "concurrent", "posix", "text", "util" ]
+# else
+ = [ ]
+# endif
+
+showLS (Object nm) = "(static) " ++ nm
+showLS (DLL nm) = "(dynamic) " ++ nm
linkPackages :: DynFlags -> [LibrarySpec] -> [PackageConfig] -> IO ()
linkPackages dflags cmdline_lib_specs pkgs
if (null cmdline_lib_specs)
then return ()
else do maybePutStr dflags "final link ... "
+
ok <- resolveObjs
if ok then maybePutStrLn dflags "done."
else throwDyn (InstallationError
preloadLib dflags lib_paths lib_spec
= do maybePutStr dflags ("Loading object " ++ showLS lib_spec ++ " ... ")
case lib_spec of
- Left static_ish
+ Object static_ish
-> do b <- preload_static lib_paths static_ish
maybePutStrLn dflags (if b then "done."
else "not found")
- Right dll_unadorned
+ DLL dll_unadorned
-> -- We add "" to the set of paths to try, so that
-- if none of the real paths match, we force addDLL
-- to look in the default dynamic-link search paths.
- do maybe_errstr <- preload_dynamic (lib_paths++[""])
+ do maybe_errstr <- loadDynamic (lib_paths++[""])
dll_unadorned
case maybe_errstr of
Nothing -> return ()
if not b then return False
else loadObj name >> return True
- -- return Nothing == success, else Just error message from addDLL
- preload_dynamic [] name
- = return Nothing
- preload_dynamic (path:paths) rootname
- = do -- addDLL returns NULL on success
- maybe_errmsg <- addDLL path rootname
- if maybe_errmsg == nullPtr
- then preload_dynamic paths rootname
- else do str <- peekCString maybe_errmsg
- return (Just str)
-
give_up
= (throwDyn . CmdLineError)
"user specified .o/.so/.DLL could not be loaded."
--- Packages that don't need loading, because the compiler shares them with
--- the interpreted program.
-dont_load_these = [ "rts" ]
-
--- Packages that are already linked into GHCi. For mingw32, we only
--- skip gmp and rts, since std and after need to load the msvcrt.dll
--- library which std depends on.
-loaded_in_ghci
-# ifndef mingw32_TARGET_OS
- = [ "std", "concurrent", "posix", "text", "util" ]
-# else
- = [ ]
-# endif
-
linkPackage :: DynFlags -> PackageConfig -> IO ()
linkPackage dflags pkg
| name pkg `elem` dont_load_these = return ()
| otherwise
= do
- -- For each obj, try obj.o and if that fails, obj.so.
- -- Complication: all the .so's must be loaded before any of the .o's.
let dirs = library_dirs pkg
- let objs = hs_libraries pkg ++ extra_libraries pkg
- classifieds <- mapM (locateOneObj dirs) objs
+ let libs = hs_libraries pkg ++ extra_libraries pkg
+ classifieds <- mapM (locateOneObj dirs) libs
- -- Don't load the .so libs if this is a package GHCi is already
- -- linked against, because we'll already have the .so linked in.
- let (so_libs, obj_libs) = partition isRight classifieds
- let sos_first | name pkg `elem` loaded_in_ghci = obj_libs
- | otherwise = so_libs ++ obj_libs
+ -- Complication: all the .so's must be loaded before any of the .o's.
+ let dlls = [ dll | DLL dll <- classifieds ]
+ objs = [ obj | Object obj <- classifieds ]
maybePutStr dflags ("Loading package " ++ name pkg ++ " ... ")
- mapM loadClassified sos_first
+
+ -- If this package is already part of the GHCi binary, we'll already
+ -- have the right DLLs for this package loaded, so don't try to
+ -- load them again.
+ when (name pkg `notElem` loaded_in_ghci) $
+ loadDynamics dirs dlls
+
+ -- After loading all the DLLs, we can load the static objects.
+ mapM loadObj objs
+
maybePutStr dflags "linking ... "
ok <- resolveObjs
if ok then maybePutStrLn dflags "done."
else panic ("can't load package `" ++ name pkg ++ "'")
- where
- isRight (Right _) = True
- isRight (Left _) = False
-
-loadClassified :: LibrarySpec -> IO ()
-loadClassified (Left obj_absolute_filename)
- = do loadObj obj_absolute_filename
-loadClassified (Right dll_unadorned)
- = do maybe_errmsg <- addDLL "" dll_unadorned -- doesn't seem right to me
- if maybe_errmsg == nullPtr
- then return ()
- else do str <- peekCString maybe_errmsg
- throwDyn (CmdLineError ("can't load .so/.DLL for: "
- ++ dll_unadorned ++ " (" ++ str ++ ")" ))
+loadDynamics dirs [] = return ()
+loadDynamics dirs (dll:dlls) = do
+ r <- loadDynamic dirs dll
+ case r of
+ Nothing -> loadDynamics dirs dlls
+ Just err -> throwDyn (CmdLineError ("can't load .so/.DLL for: "
+ ++ dll ++ " (" ++ err ++ ")" ))
+
+-- 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.
locateOneObj :: [FilePath] -> String -> IO LibrarySpec
-locateOneObj [] obj
- = return (Right obj) -- we assume
-locateOneObj (d:ds) obj
- = do let path = d ++ '/':obj ++ ".o"
+locateOneObj [] lib
+ = return (DLL lib) -- we assume
+locateOneObj (d:ds) lib
+ = do let path = d ++ '/':lib ++ ".o"
b <- doesFileExist path
- if b then return (Left path) else locateOneObj ds obj
+ if b then return (Object path) else locateOneObj ds lib
+
+-- ----------------------------------------------------------------------------
+-- Loading a dyanmic library (dlopen()-ish on Unix, LoadLibrary-ish on Win32)
+
+#ifdef mingw32_TARGET_OS
+loadDynamic paths rootname = do
+ -- ignore paths on windows (why? --SDM)
+ maybe_errmsg <- addDLL rootname
+ if maybe_errmsg == nullPtr
+ then return Nothing
+ else do str <- peekCString maybe_errmsg
+ return (Just str)
+
+addDLL :: String -> String -> IO (Ptr CChar)
+addDLL path lib = do
+ withCString path $ \c_path -> do
+ withCString lib $ \c_lib -> do
+ maybe_errmsg <- c_addDLL c_path c_lib
+ return maybe_errmsg
+
+#else
+
+-- return Nothing == success, else Just error message from dlopen
+loadDynamic (path:paths) rootname = do
+ let dll = path ++ '/':mkSOName rootname
+ b <- doesFileExist dll
+ if not b
+ then loadDynamic paths rootname
+ else addDLL dll
+loadDynamic [] rootname = do
+ -- tried all our known library paths, let dlopen() search its
+ -- own builtin paths now.
+ addDLL (mkSOName rootname)
+
+mkSOName root = "lib" ++ root ++ ".so"
+
+addDLL :: String -> IO (Maybe String)
+addDLL str = do
+ maybe_errmsg <- withCString str $ \dll -> c_addDLL dll
+ if maybe_errmsg == nullPtr
+ then return Nothing
+ else do str <- peekCString maybe_errmsg
+ return (Just str)
+
+foreign import ccall "addDLL" unsafe
+ c_addDLL :: CString -> IO CString
+
+foreign import ccall "dlerror" unsafe
+ dlerror :: IO CString
+
+#endif
-----------------------------------------------------------------------------
-- timing & statistics
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