[Xenomai] segfault using rt_printf service

["Alessio Margan]

Hi all,

I'm switching from xenomai 2.5.6 to 2.6.1 using 
adeos-ipipe-2.6.38.8-x86-2.11-01.patch
In this test I have 2 threads :
- rx_udp receive udp packets from dsp boards at 1kHz
- boards_test send udp packets at 1kHz

I got segfault in printer_loop thread, the point is that if I change env 
var RT_PRINT_PERIOD to about 10 or 1000 (default is 100 ms) I do not 
have segfault.

Any suggestion ?

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb7d1ab70 (LWP 5998)]
0xb7d7cb0c in fwrite () from /lib/i686/cmov/libc.so.6
(gdb) bt
#0  0xb7d7cb0c in fwrite () from /lib/i686/cmov/libc.so.6
#1  0xb7fccbf9 in print_buffers () from /usr/xenomai/lib/libxenomai.so.0
#2  0xb7fcd867 in printer_loop () from /usr/xenomai/lib/libxenomai.so.0
#3  0xb7fb5955 in start_thread () from /lib/i686/cmov/libpthread.so.0
#4  0xb7dec5ee in clone () from /lib/i686/cmov/libc.so.6

 >> /proc/xenomai/stat
CPU  PID    MSW        CSW        PF    STAT       %CPU  NAME
   0  0      0          2584201    0     00500080   94.1  ROOT/0
   1  0      0          130190     0     00500080   99.8  ROOT/1
   0  0      0          2571624    0     00000082    0.5  rtnet-stack
   0  0      0          109        0     00000082    0.0  rtnet-rtpc
   1  0      0          21680      0     00000084    0.0  rttcp timerwheel
   0  6069   1          1          0     00b00380    0.0  test_main
   0  6071   3          29998      0     00340184    0.7  boards_test
   0  6072   3          60007      0     00340182    2.8  rx_udp
   1  0      0          0          0     00000000    0.0  IRQ19: rteth0
   1  0      0          25100574   0     00000000    0.2  IRQ521: [timer]

CPU  PID    PRI      PERIOD     NAME
   0  0          98      -          rtnet-stack
   0  0            0      -          rtnet-rtpc
   1  0            1      -          rttcp timerwheel
   0  6069      0      -          test_main
   0  6071    99      1ms     boards_test
   0  6072    99      -          rx_udp


TIA

Alessio

-- 

ISTITUTO ITALIANO
DI TECNOLOGIA

Alessio Margan
/Senior Technician/
/Advanced Robotics/

Via Morego, 30 16163 Genova 
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