Threads support faulty in R8B-0 and R8B-1?

Shawn Pearce <>
Fri May 17 21:55:50 CEST 2002

I'm having this exact same issue on Debian with 2.4.18.  I built
beam with hipe, but have not tried it without hipe.  I stuck it on the
back burner, as I could always run the driver I'm developing in a
pthread or an external process.

I hadn't seen anything in the mailing list archives about this occuring
before, but I didn't spend that long search either.

Leonid Timochouk <> scrawled:
> Hello Erlang users,
> I am using Erlang/OTP R8B-0 (and now R8B-1) on Debian Linux with glibc
> 2.2.5, kernel 2.4.18. In both cases, "beam" blocks immediately on start-up
> if invoked with a non-0 number of threads via the "+A" option, does not
> even display the initial "Erlang (BEAM) emulator version ..." message. It
> does create 3 threads, though, and the first of them can be observed with
> a debugger. It has the following call stack (blocked at "sigsuspend"):
> #0  0x400daa0e in sigsuspend () from /lib/
> #1  0x400a0629 in __pthread_wait_for_restart_signal ()
>    from /lib/
> #2  0x4009fe2c in pthread_create@@GLIBC_2.1 () from /lib/
> #3  0x0809b33a in erts_thread_create (tpp=0x83b3498,
>     func=0x809abac <async_main>, arg=0x83b3490, detached=0)
>     at sys/unix/sys_threads.c:226
> #4  0x0809b029 in init_async (hndl=4) at beam/erl_async.c:90
> #5  0x080b5f74 in async_drv_start (port_num=1, name=0x80e38bc "async",
>     opts=0xbffff750) at sys/unix/sys.c:1798
> #6  0x08070098 in open_driver (driver=0x8102540, pid=7,
>     name=0x80e38bc "async", opts=0xbffff750) at beam/io.c:285
> #7  0x080b6515 in sys_init_io (buf=0x8134700 "", size=65536)
>     at sys/unix/sys.c:2175
> #8  0x08070e0e in init_io () at beam/io.c:725
> #9  0x0805b8c9 in erl_init () at beam/erl_init.c:200
> #10 0x0805c171 in erl_start (argc=10, argv=0xbffffb04) at
> beam/erl_init.c:881
> #11 0x0805b82b in main (argc=10, argv=0xbffffb04) at
> sys/unix/erl_main.c:27
> #12 0x400ca65f in __libc_start_main () from /lib/
> Anyone has an idea what's going on?
> Best regards,
> Leonid Timochouk
> Computing Laboratory
> University of Kent at Canterbury

Why do I like Perl?  Because ``in accordance with Unix tradition Perl
gives you enough rope to hang yourself with.''

Why do I dislike Java? Because ``the class ROPE that should contain the
method HANG to do the hanging doesn't exist because there is too much
'security' built into the base language.''

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