>From testing, I found that if I enable PTHREAD_WARNSW for a pthread, I must
explicitly disable this mode before the thread terminates, or the thread
draws a signal 24 SIGXCPU.
I've tried to simplify my thread terminations by pushing a function which
calls pthread_set_mode_np(PTHREAD_WARNSW, 0) onto the thread cleanup stack,
and always terminating the thread via pthread_exit(). However, this method
still draws a signal 24 SIGXCPU. Here's a sample backtrace:
Program terminated with signal 24, CPU time limit exceeded.
#0 0xffffe424 in __kernel_vsyscall ()
(gdb) bt full
#0 0xffffe424 in __kernel_vsyscall ()
No symbol table info available.
#1 0xb781d561 in pthread_once () from /lib/libpthread.so.0
No symbol table info available.
#2 0xb76e0450 in ?? () from /lib/libgcc_s.so.1
No symbol table info available.
#3 0xb76e09de in _Unwind_ForcedUnwind () from /lib/libgcc_s.so.1
No symbol table info available.
#4 0xb7821032 in _Unwind_ForcedUnwind () from /lib/libpthread.so.0
No symbol table info available.
#5 0xb781ea97 in __pthread_unwind () from /lib/libpthread.so.0
No symbol table info available.
#6 0xb7818a5e in pthread_exit () from /lib/libpthread.so.0
No symbol table info available.
#7 0x0804969b in my program termination code
Am I coding this incorrectly, or is this just the way pthreads interacts
with Xenomai?
my config:
# xeno-config --version
2.5.6
# ldd ./mq_test
linux-gate.so.1 => (0xffffe000)
libpthread_rt.so.1 => /usr/xenomai/lib/libpthread_rt.so.1
(0xb778b000)
libxenomai.so.0 => /usr/xenomai/lib/libxenomai.so.0 (0xb7785000)
libpthread.so.0 => /lib/libpthread.so.0 (0xb776a000)
librt.so.1 => /lib/librt.so.1 (0xb7760000)
librtdk.so.0 => /usr/xenomai/lib/librtdk.so.0 (0xb775a000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb766a000)
libm.so.6 => /lib/libm.so.6 (0xb7640000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb7622000)
libc.so.6 => /lib/libc.so.6 (0xb74b7000)
/lib/ld-linux.so.2 (0xb77b4000)
#> rpm -qf /lib/libpthread.so.0
glibc-2.11.2-3.1.1.i686
# uname -a
Linux xeno2 2.6.37.3-xeno-2.5.6-smp #1 SMP PREEMPT Fri Mar 11 12:43:02 CST
2011 i686 i686 i386 GNU/Linux
TIA,
Jeff
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