[erlang-bugs] Segmentation Fault R13B01

Raimo Niskanen <>
Wed Jul 1 18:06:54 CEST 2009


On Wed, Jul 01, 2009 at 05:25:14PM +0200, Georgos Siganos wrote:
> Hi All,I am having problems with R13B01 and segmentation faults, as the
> following one (in the bottom).
> Unfortunately, i am not sure which part of the code triggers the
> segmentation fault.
> 
> I am running Centos 5.3 ( 2.6.18-128.1.16.el5 #1 SMP x86_64 ) on a quad core
> intel processor.
> The program quits with segfault both when compiled with and without hipe.
> 
> Please let me know if there is anything else i can report to fix this
> problem. This
> segmentation
> fault is quite consistent and is a show stopper for my code.
> Thanks,
> Georgos

How did you build the Erlang emulator, how did you start it
(arguments), how did you provoke the segfault?

Can you post the code that provokes this to see
if it is reproducable on other OS:es?

Can you post the core dump for the Erlang/OTP team to dissect?

Can you build and run a debug emulator and see if you get an earlier
fault detection? (gmake smp TYPE=debug in the emulator directory)

> 
> 
> ----------------------- gdb output --------------------------
> Program terminated with signal 11, Segmentation fault.
> [New process 12531]
> [New process 12533]
> [New process 12532]
> [New process 12530]
> [New process 12526]
> [New process 12517]
> [New process 12516]
> [New process 12514]
> #0  0x00002add1f7b570b in memcpy () from /lib64/libc.so.6
> (gdb) bt
> #0  0x00002add1f7b570b in memcpy () from /lib64/libc.so.6
> #1  0x0000000000486849 in driver_deliver_term (port=<value optimized out>,
> to=4816451, data=<value optimized out>,
>     len=<value optimized out>) at beam/io.c:2994
> #2  0x00000000005513cf in tcp_deliver (desc=0x2aab17c17548, len=3) at
> drivers/common/inet_drv.c:2980
> #3  0x0000000000551891 in tcp_recv (desc=0x2aab17c17548, request_len=0) at
> drivers/common/inet_drv.c:8043
> #4  0x0000000000551afc in tcp_inet_drv_input (data=0x2aaae21a9fc4,
> event=<value optimized out>) at drivers/common/inet_drv.c:8381
> #5  0x00000000004a3d78 in erts_port_task_execute (runq=0x2add1fc19340,
> curr_port_pp=0x2aaaaaacb1e8) at beam/erl_port_task.c:853
> #6  0x000000000049ebc5 in schedule (p=0x349, calls=<value optimized out>) at
> beam/erl_process.c:6116
> #7  0x0000000000505afd in process_main () at beam/beam_emu.c:1126
> #8  0x0000000000499126 in sched_thread_func (vesdp=<value optimized out>) at
> beam/erl_process.c:3015
> #9  0x000000000057a0f4 in thr_wrapper (vtwd=<value optimized out>) at
> common/ethread.c:475
> #10 0x00002add1f31b367 in start_thread () from /lib64/libpthread.so.0
> #11 0x00002add1f80cf7d in clone () from /lib64/libc.so.6
> ---------------------------------------------------------------------------

-- 

/ Raimo Niskanen, Erlang/OTP, Ericsson AB


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