#endif
import Exception
-import Control.Concurrent ( MVar, ThreadId, withMVar, newMVar )
+import Control.Concurrent ( MVar, ThreadId, withMVar, newMVar, modifyMVar_,
+ myThreadId )
import Data.Dynamic
import Debug.Trace ( trace )
import System.IO.Unsafe ( unsafePerformIO )
= PhaseFailed String -- name of phase
ExitCode -- an external phase (eg. cpp) failed
| Interrupted -- someone pressed ^C
+ | Signal Int -- some other fatal signal (SIGHUP,SIGTERM)
| UsageError String -- prints the short usage msg after the error
| CmdLineError String -- cmdline prob, but doesn't print usage
| Panic String -- the `impossible' happened
= showString str
showGhcException (Interrupted)
= showString "interrupted"
+showGhcException (Signal n)
+ = showString "signal: " . shows n
showGhcException (Panic s)
= showString ("panic! (the 'impossible' happened)\n"
++ " (GHC version " ++ cProjectVersion ++ " for " ++ TargetPlatform_NAME ++ "):\n\t"
case fromException se of
-- Some GhcException's we rethrow,
Just Interrupted -> throwIO se
+ Just (Signal _) -> throwIO se
Just (Panic _) -> throwIO se
-- others we return
Just _ -> return (Left se)
\begin{code}
installSignalHandlers :: IO ()
installSignalHandlers = do
+ main_thread <- myThreadId
+ modifyMVar_ interruptTargetThread (return . (main_thread :))
+
let
interrupt_exn = (toException Interrupted)
case targets of
[] -> return ()
(thread:_) -> throwTo thread interrupt_exn
+
+ fatal_signal n = throwTo main_thread (Signal (fromIntegral n))
+
--
#if !defined(mingw32_HOST_OS)
- _ <- installHandler sigQUIT (Catch interrupt) Nothing
- _ <- installHandler sigINT (Catch interrupt) Nothing
+ _ <- installHandler sigQUIT (Catch interrupt) Nothing
+ _ <- installHandler sigINT (Catch interrupt) Nothing
+ -- see #3656; in the future we should install these automatically for
+ -- all Haskell programs in the same way that we install a ^C handler.
+ _ <- installHandler sigHUP (Catch (fatal_signal sigHUP)) Nothing
+ _ <- installHandler sigTERM (Catch (fatal_signal sigTERM)) Nothing
return ()
#else
-- GHC 6.3+ has support for console events on Windows