[erlang-bugs] SIGBUS on init:restart()

Patrick Baggett <>
Mon Aug 15 03:45:13 CEST 2011


A typecast? That shouldn't affect code generation like that. Are you sure
you didn't just need to do a clean build or something?

On Sun, Aug 14, 2011 at 7:58 PM, Filipe David Manana <>wrote:

> Found out the issue. It turned out to be a bad cast in linked in
> driver from CouchDB:
>
> diff --git a/src/couchdb/priv/icu_driver/couch_icu_driver.c
> b/src/couchdb/priv/icu_driver/couch_icu_driver.c
> index 9f20e99..edfd84a 100644
> --- a/src/couchdb/priv/icu_driver/couch_icu_driver.c
> +++ b/src/couchdb/priv/icu_driver/couch_icu_driver.c
> @@ -45,7 +45,7 @@ static void couch_drv_stop(ErlDrvData data)
>     if (pData->collNoCase) {
>         ucol_close(pData->collNoCase);
>     }
> -    driver_free((char*)pData);
> +    driver_free((void*)pData);
>  }
>
>  static ErlDrvData couch_drv_start(ErlDrvPort port, char *buff)
>
>
>
> On Sun, Aug 14, 2011 at 3:18 PM, Filipe David Manana
> <> wrote:
> > If I compile OTP R14B03 (also tried R14B01, and got same issue) for
> > 64bits mode in Mac OS X Lion, when calling init:restart() in my
> > application I get a SIGBUS signal, which causes the VM to terminate
> > (it happens very often, but not always) with the error message "Bus
> > error: 10".
> >
> > Here's some information from gdb which might be useful:
> >
> > http://friendpaste.com/AL9GKX2pNdyb3NIEYWxcR
> >
> > Ignoring the SIGBUS signal prevents the crash, but this is likely
> > masking some bug:
> >
> > diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
> > index bafbbb0..86c3f57 100644
> > --- a/erts/emulator/sys/unix/sys.c
> > +++ b/erts/emulator/sys/unix/sys.c
> > @@ -3031,6 +3031,9 @@ erts_sys_main_thread(void)
> >        fd_set readfds;
> >        int res;
> >
> > +    signal(SIGPIPE, SIG_IGN);
> > +    signal(SIGBUS, SIG_IGN);
> > +
> >        FD_ZERO(&readfds);
> >        FD_SET(erts_darwin_main_thread_pipe[0], &readfds);
> >        res = select(erts_darwin_main_thread_pipe[0] + 1, &readfds,
> > NULL, NULL, NULL);
> >
> >
> > OTP was configured like this:
> >
> > $ CFLAGS="-O0" ./configure --enable-darwin-64bit --prefix=/opt/r14b03
> >
> > Without the --enable-darwin-64bit option, the issue doesn't happen.
> >
> > Is this a known issue or can it be application-specific? How to debug
> > it further?
> >
> > This issue doesn't seem to happen on Linux and Mac OS X snowleopard
> systems.
> >
> > thanks
> >
> >
> > --
> > Filipe David Manana,
> > , 
> >
> > "Reasonable men adapt themselves to the world.
> >  Unreasonable men adapt the world to themselves.
> >  That's why all progress depends on unreasonable men."
> >
>
>
>
> --
> Filipe David Manana,
> , 
>
> "Reasonable men adapt themselves to the world.
>  Unreasonable men adapt the world to themselves.
>  That's why all progress depends on unreasonable men."
> _______________________________________________
> erlang-bugs mailing list
> 
> http://erlang.org/mailman/listinfo/erlang-bugs
>
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