EVACUATED object entered! (when doing FFI)

Fri, 25 Oct 2002 04:41:19 +0200

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Good morning again,

Thank you for answering.

I am using ghc 5.04.1 I compiled myself on a linux box (Mandrake 8.2) .

I'm sending you the source code. Compiled it with the following commands :

ghc -ffi -c GetFNamesBckp.hs -o GetFNamesBckp.o

gcc -I/opt/installed/ghc-5.04.1/lib/ghc-5.04.1/include -c cGetFNamesBckp.c -o 
cGetFNamesBckp.o

ghc -no-hs-main GetFNamesBckp_stub.o GetFNamesBckp.o cGetFNamesBckp.o

If you comment out the "foreign export" command on line 11 in 
GetFNamesBckp.hs and do :

ghc --make Main.hs

Then the executable works ! That's why I thought it had to do with FFI and 
memory allocation.

Thank you

Francis Girard
Le Conquet
France

Le 24 Octobre 2002 09:28, Simon Peyton-Jones a écrit :
> It's certainly a bug of some kind.  Please say what version of GHC you
> are using.  If it's the latest one (5.04.1), please send us the source
> code.
>
> Thanks
>
> Simon
>
> | -----Original Message-----
> | From: Francis Girard [mailto:francis.girard@free.fr]
> | Sent: 24 October 2002 04:02
> | To: glasgow-haskell-users@haskell.org
> | Subject: EVACUATED object entered! (when doing FFI)
> |
> | Good morning,
> |
> | I wrote a very small program, and it executed ok.
> | I wanted to export a function in "C", and therefore wrote a "C"
>
> wrapper
>
> | function over it to invoke peekCString and peekArray on the input;
>
> newCString
>
> | and newArray on the output.
> |
> | I then did a small "C" driver program. Everything compiled and linked
> | correctly.
> |
> | But at execution the program prints :
> |
> | EVACUATED object entered!
> |
> | as soon as "startupHaskell" is invoked (i.e. even before I call my
>
> foreign
>
> | exported function !)
> |
> | What is the meaning of this message ?
> |
> | Thank you
> |
> | Francis Girard
> | Le Conquet
> | France
> |
> |
> | _______________________________________________
> | Glasgow-haskell-users mailing list
> | Glasgow-haskell-users@haskell.org
> | http://www.haskell.org/mailman/listinfo/glasgow-haskell-users

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