[project @ 2001-08-04 06:11:24 by ken]

[ghc-hetmet.git] / ghc / lib / std / PrelMain.lhs

diff --git a/ghc/lib/std/PrelMain.lhs b/ghc/lib/std/PrelMain.lhs
index 764f201..d484482 100644 (file)
--- a/ghc/lib/std/PrelMain.lhs
+++ b/ghc/lib/std/PrelMain.lhs
@@ -1,63 +1,22 @@
+% ------------------------------------------------------------------------------
+% $Id: PrelMain.lhs,v 1.9 2001/05/21 14:07:31 simonmar Exp $
 %
-% (c) The AQUA Project, Glasgow University, 1994-1997
+% (c) The University of Glasgow, 1994-2000
 %
 
 \section[PrelMain]{Module @PrelMain@}
 
 \begin{code}
-{-# OPTIONS -#include "cbits/stgio.h" #-}
-
 module PrelMain( mainIO ) where
 
-import Prelude
 import {-# SOURCE #-} qualified Main   -- for type of "Main.main"
-import IO              ( hFlush, hPutStr, stdout, stderr )
-import PrelAddr        ( Addr )
+
+import IO
 import PrelException
-import PrelPack     ( packString )
-import PrelArr      ( ByteArray(..) )
-\end{code}
+import PrelTopHandler
 
-\begin{code}
 mainIO :: IO ()                -- It must be of type (IO t) because that's what
                        -- the RTS expects.  GHC doesn't check this, so
                        -- make sure this type signature stays!
-mainIO = catchException Main.main handler
-
--- make sure we handle errors while reporting the error!
--- (e.g. evaluating the string passed to 'error' might generate
---  another error, etc.)
-
-handler :: Exception -> IO ()
-handler err = catchException (real_handler err) handler
-
-real_handler :: Exception -> IO ()
-real_handler ex =
-  case ex of
-       AsyncException StackOverflow -> reportStackOverflow
-       ErrorCall s -> reportError s
-       other       -> reportError (showsPrec 0 other "\n")
-
-reportStackOverflow :: IO ()
-reportStackOverflow = do
-   (hFlush stdout) `catchException` (\ _ -> return ())
-   callStackOverflowHook
-   stg_exit 2  
-
-reportError :: String -> IO ()
-reportError str = do
-   (hFlush stdout) `catchException` (\ _ -> return ())
-   let bs@(ByteArray (_,len) _) = packString str
-   writeErrString (``&ErrorHdrHook''::Addr) bs len
-   stg_exit 1
-
-foreign import ccall "writeErrString__" 
-       writeErrString :: Addr -> ByteArray Int -> Int -> IO ()
-
-foreign import ccall "stackOverflow"
-       callStackOverflowHook :: IO ()
-
-foreign import ccall "stg_exit"
-       stg_exit :: Int -> IO ()
-
+mainIO = catchException Main.main topHandler
 \end{code}