Thanks for looking at the coredump. Debugging with real time in Linux
is certainly different to msvs!
Possibly line:539, but thanks that is very helpfull
My main spur to build a i386 machine was to be able to debug the
original commits, which I now can begin.
The alternative to trying to debug the failure of the complete set of
merged commits, is to reintroduce them
one by one until it fails and narrow down what specifically caused it. I
think I will go that route, now that I can build RIP
builds and do that more easily (and now have an idea where the fault is
likely to occur)
regards
On 11/28/2018 1:38 AM, [email protected] wrote:
And am I understanding it correctly that it is dying on line 384 of
file src/rtapi/rt-preempt.c, right?
Cern
Dne středa 28. listopadu 2018 2:13:54 UTC+1 [email protected] napsal(a):
Hello,
OK, I am used to Visual Studio, so gdb (and others) are
interesting experience. Was able to experiment, that problem is
caused (minimally) by creating new thread (halcmd newthread ...)
and if I am not mistaken by call to pthread_create(params).
Commands from terminal:
machinekit@machinekit:~$ DEBUG=5 realtime start
rtapi_msgd command: /usr/libexec/linuxcnc/rtapi_msgd --instance=0
--rtmsglevel=5 --usrmsglevel=5 --halsize=524288
warning: removing unused HAL shm segment /linuxcnc-0-00414c32
rtapi_app command: /usr/libexec/linuxcnc/rtapi_app_rt-preempt
--instance=0
machinekit@machinekit:~$ halcmd newthread fff 5000000 fp
<commandline>:0: rc=-1: rtapi_rpc(): reply timeout
machinekit@machinekit:~$ pidof rtapi:0
24452
machinekit@machinekit:~$ sudo gdb -p 24452
[sudo] heslo pro machinekit:
GNU gdb (Debian 7.12-6) 7.12.0.20161007-git
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License GPLv3+: GNU GPL version 3 or later
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This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show
copying"
and "show warranty" for details.
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Type "show configuration" for configuration details.
For bug reporting instructions, please see:
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Attaching to process 24452
[New LWP 24456]
[New LWP 24457]
[Thread debugging using libthread_db enabled]
Using host libthread_db library
"/lib/i386-linux-gnu/libthread_db.so.1".
0xb77afcf9 in __kernel_vsyscall ()
(gdb) c
Continuing.
Thread 1 "rtapi:0" received signal SIGSEGV, Segmentation fault.
0xb7366b18 in allocate_stack (stack=<synthetic pointer>,
pdp=<synthetic pointer>, attr=0xbf9b1560) at allocatestack.c:414
414 allocatestack.c: Adresář nebo soubor neexistuje.
(gdb) backtrace
#0 0xb7366b18 in allocate_stack (stack=<synthetic pointer>,
pdp=<synthetic pointer>, attr=0xbf9b1560) at allocatestack.c:414
#1 __pthread_create_2_1 (newthread=0xb69e302c, attr=0xbf9b1560,
start_routine=0xb69d1978, arg=0xb69e03ec) at pthread_create.c:539
#2 0xb7367230 in __pthread_create_2_0 (newthread=0xb69e302c,
attr=0xbf9b1560, start_routine=0xb69d1978, arg=0xb69e03ec)
at pthread_create.c:765
#3 0xb69d1d53 in ?? () from /usr/lib/linuxcnc/rt-preempt/rtapi.so
#4 0xb69cf4f1 in ?? () from /usr/lib/linuxcnc/rt-preempt/rtapi.so
#5 0xb68c1416 in hal_create_xthread ()
from /usr/lib/linuxcnc/rt-preempt/hal_lib.so
#6 0x0047af27 in ?? ()
#7 0xb730dd9c in zloop_start () from
/usr/lib/i386-linux-gnu/libczmq.so.4
#8 0x00479166 in ?? ()
#9 0x004720a5 in main ()
(gdb)
Nov 28 02:08:15 machinekit msgd:0: startup pid=24447
flavor=rt-preempt rtlevel=5 usrlevel=5 halsize=524288 shm=Posix
cc=gcc 6.3.0 20170516 version=v0.1~-----~9c3423c
Nov 28 02:08:15 machinekit msgd:0: ØMQ=4.2.1 czmq=4.0.2
protobuf=3.0.0 atomics=gcc intrinsics libwebsockets=2.0.3
Nov 28 02:08:15 machinekit msgd:0: configured: sha=9c3423c
Nov 28 02:08:15 machinekit msgd:0: built: Nov 14 2018
12:37:25 sha=9c3423c
Nov 28 02:08:15 machinekit msgd:0: register_stuff: actual hostname
as announced by avahi='machinekit.local'
Nov 28 02:08:15 machinekit msgd:0: zeroconf: registering: 'Log
service on machinekit.local pid 24447'
Nov 28 02:08:15 machinekit rtapi:0: 2:rtapi_app:24452:user
rtapi:0: cannot create core dumps - /proc/sys/fs/suid_dumpable
contains 0
Nov 28 02:08:15 machinekit rtapi:0: 2:rtapi_app:24452:user you
might have to run 'echo 1 > /proc/sys/fs/suid_dumpable' as root to
enable rtapi_app core dumps
Nov 28 02:08:15 machinekit rtapi:0: 4:rtapi_app:24452:user rtapi:
loaded from rtapi.so
Nov 28 02:08:15 machinekit rtapi:0: 4:rtapi_app:24452:user
hal_lib: loaded from hal_lib.so
Nov 28 02:08:15 machinekit msgd:0: rtapi:24452:rt
rtapi_app_main:195 HAL: initializing RT hal_lib support
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24452:rt
halg_xinitfv:90 HAL: initializing component 'hal_lib' type=4
arg1=0 arg2=0/0x0
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24452:rt
hal_heap_addmem:58 HAL: extending arena by 262144 bytes
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24452:rt
halg_export_xfunctfv:85 HAL: exporting function 'newinst' type 2
fp=0 owner=66
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24452:rt
halg_export_xfunctfv:85 HAL: exporting function 'delinst' type 2
fp=0 owner=66
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24452:rt
halg_xinitfv:271 HAL: singleton component 'hal_lib' id=66 initialized
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24452:rt
rtapi_app_main:199 HAL: RT hal_lib support initialized rc=66
Nov 28 02:08:15 machinekit rtapi:0: 4:rtapi_app:24452:user
accepting commands at
ipc:///tmp/0.rtapi.a42c8c6b-4025-4f83-ba28-dad21114744a
Nov 28 02:08:15 machinekit rtapi:0: 3:rtapi_app:24452:user
rtapi_app:0 ready flavor=rt-preempt gcc=6.3.0 20170516
git=v0.1~-----~9c3423c
Nov 28 02:08:15 machinekit rtapi:0: 4:rtapi_app:24452:user
pid=24452 flavor=rt-preempt gcc=6.3.0 20170516 git=v0.1~-----~9c3423c
Nov 28 02:08:15 machinekit rtapi:0: 4:rtapi_app:24452:user
pid=24452 flavor=rt-preempt gcc=6.3.0 20170516 git=v0.1~-----~9c3423c
Nov 28 02:08:15 machinekit msgd:0: ulapi:24453:user _ulapi_init():
ulapi rt-preempt v0.1~-----~9c3423c loaded
Nov 28 02:08:15 machinekit msgd:0: ulapi:24453:user
halg_xinitfv:271 HAL: singleton component 'hal_lib24453' id=70
initialized
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24453:user --halcmd ping
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24453:user
halg_exit:293 HAL: removing component 72 'halcmd24453'
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24453:user
ulapi_hal_lib_cleanup:235 HAL: lib_module_id=70
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24453:user
halg_exit:293 HAL: removing component 70 'hal_lib24453'
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24453:user
halg_exit:315 HAL: hal_errorcount()=0
Nov 28 02:08:15 machinekit msgd:0: hal_lib:24453:user
halg_exit:316 HAL: _halerrno=0
Nov 28 02:08:16 machinekit msgd:0: zeroconf: registered 'Log
service on machinekit.local pid 24447' _machinekit._tcp 0 TXT
"uuid=a42c8c6b-4025-4f83-ba28-dad21114744a"
"instance=15603820-f2aa-11e8-b229-000c6e417379" "service=log"
"dsn=ipc:///tmp/0.log.a42c8c6b-4025-4f83-ba28-dad21114744a"
Nov 28 02:09:34 machinekit rtapi:0: 4:rtapi_app:24452:user
pid=24452 flavor=rt-preempt gcc=6.3.0 20170516 git=v0.1~-----~9c3423c
Nov 28 02:09:34 machinekit msgd:0: ulapi:24481:user _ulapi_init():
ulapi rt-preempt v0.1~-----~9c3423c loaded
Nov 28 02:09:34 machinekit msgd:0: ulapi:24481:user
halg_xinitfv:271 HAL: singleton component 'hal_lib24481' id=74
initialized
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24481:user --halcmd
newthread fff 5000000 fp
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt
hal_create_xthread:156 HAL: creating thread fff, 5000000 nsec fp=1
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt
rtapi_clock_set_period (res=1) -> 5000000
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt Creating new
task 1 'fff:0': req prio 98 (highest=99 lowest=1) stack=32768
fp=1 flags=0
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt Task CPU: 0
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt RTAPI: task 01
installed by module 66, priority 98, code: 0xb68c0941
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt
halg_pin_newfv:192 HAL: creating pin 'fff.time' s32 OUT 0
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt
halg_pin_newfv:192 HAL: creating pin 'fff.tmax' s32 I/O 0
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt
halg_pin_newfv:192 HAL: creating pin 'fff.curr-period' s32 OUT 0
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt
rtapi_task_start: starting task 1 'fff:0'
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt RTAPI:
period_nsec: 5000000
Nov 28 02:09:34 machinekit msgd:0: hal_lib:24452:rt About to
pthread_create task 1
Still have no idea why change in makefiles created this problem.
(Will have to study Make syntax.)
Cern
Dne pátek 23. listopadu 2018 19:20:21 UTC+1 [email protected] napsal(a):
If you are up for it, you can try to debug the core dump
that you have
http://www.machinekit.io/docs/code/Debugging-RT-components/
<http://www.machinekit.io/docs/code/Debugging-RT-components/>
I have found that this works quite well on rt-preempt
kernels, in pinpointing exactly what triggered a segfault.
The log you originally posted shows the error report, but
it is far from certain exactly where this is
occurring, because motion continues to create pins either
side of it.
Will try.
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