-----------------------------------------------------------------------------
module GHC.TopHandler (
- runIO, runNonIO, reportStackOverflow, reportError
+ runIO, runNonIO, reportStackOverflow, reportError
) where
import Prelude
import System.IO
+import Control.Exception
import Foreign.C.String
import Foreign.Ptr
ExitException ExitSuccess -> safe_exit 0
ExitException (ExitFailure n) -> safe_exit n
- Deadlock -> reportError True
- "no threads to run: infinite loop or deadlock?"
-
- ErrorCall s -> reportError True s
- other -> reportError True (showsPrec 0 other "\n")
+ other -> reportError True other
+
reportStackOverflow :: Bool -> IO a
reportStackOverflow bombOut = do
then exit 2
else return undefined
-reportError :: Bool -> String -> IO a
-reportError bombOut str = do
- (hFlush stdout) `catchException` (\ _ -> return ())
- withCStringLen str $ \(cstr,len) -> do
- writeErrString errorHdrHook cstr len
- if bombOut
- then exit 1
- else return undefined
-
-#ifndef ILX
-foreign import ccall "&ErrorHdrHook" errorHdrHook :: Ptr ()
-#else
-foreign import ccall "ErrorHdrHook" errorHdrHook :: Ptr ()
-#endif
-
-foreign import ccall unsafe "writeErrString__"
- writeErrString :: Ptr () -> CString -> Int -> IO ()
+reportError :: Bool -> Exception -> IO a
+reportError bombOut ex = do
+ handler <- getUncaughtExceptionHandler
+ handler ex
+ if bombOut
+ then exit 1
+ else return undefined
-- SUP: Are the hooks allowed to re-enter Haskell land? If so, remove
-- the unsafe below.