[Spice-devel] [ spice-devel ] libspice server segfault
Alon Levy
alevy at redhat.com
Wed Sep 5 06:15:39 PDT 2012
> and with all threads :
>
> bego3 ~ # cat /storage/tmp/log6
> warning: Unable to find libthread_db matching inferior's thread
> library, thread debugging will not be available.
> Core was generated by `/usr/local/bin/qemu -name xpvirtser001
> -readconfig /etc/ich9-ehci-uhci.cfg -dev'.
> Program terminated with signal 11, Segmentation fault.
> #0 ring_add (item=<optimized out>, ring=<optimized out>) at
> ../spice-common/common/ring.h:61
> 61 ring->next = item->next->prev = item;
> (gdb) thread apply all bt
>
> Thread 5 (LWP 3065):
> #0 0x00007f9036826033 in select () from /lib/libc.so.6
> #1 0x00007f90395409d8 in os_host_main_loop_wait (timeout=4294967295)
> at main-loop.c:308
> #2 main_loop_wait (nonblocking=<optimized out>) at main-loop.c:496
> #3 0x00007f903953ffa2 in main_loop () at
> /tmp/qemu-0b3f79b9e9c17e97d8d8179defdb6e03cd9ddc8f/vl.c:1643
> #4 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized
> out>) at /tmp/qemu-0b3f79b9e9c17e97d8d8179defdb6e03cd9ddc8f/vl.c:3755
>
> Thread 4 (LWP 4885):
> #0 0x00007f9036ae027b in pthread_cond_timedwait () from
> /lib/libpthread.so.0
> #1 0x00007f903954f29a in cond_timedwait (ts=<optimized out>,
> mutex=<optimized out>, cond=<optimized out>) at
> posix-aio-compat.c:107
> #2 aio_thread (unused=<optimized out>) at posix-aio-compat.c:337
> #3 0x00007f9036adb98c in ?? () from /lib/libpthread.so.0
> #4 0x00007f903682bfcd in clone () from /lib/libc.so.6
>
> Thread 3 (LWP 3180):
> #0 0x00007f9036adfefc in pthread_cond_wait () from
> /lib/libpthread.so.0
> #1 0x00007f903956c62a in qemu_cond_wait (cond=0x7f903b6f4114,
> mutex=0x80) at qemu-thread-posix.c:113
> #2 0x00007f903959aac6 in vnc_worker_thread_loop
> (queue=0x7f903b6f4110) at ui/vnc-jobs.c:222
> #3 0x00007f903959af21 in vnc_worker_thread (arg=<optimized out>) at
> ui/vnc-jobs.c:318
> #4 0x00007f9036adb98c in ?? () from /lib/libpthread.so.0
> #5 0x00007f903682bfcd in clone () from /lib/libc.so.6
Does this happen if you run without vnc?
>
> Thread 2 (LWP 3177):
> #0 0x00007f9036825327 in ioctl () from /lib/libc.so.6
> #1 0x00007f90395e8c26 in kvm_vcpu_ioctl (env=<optimized out>,
> type=44672) at
> /tmp/qemu-0b3f79b9e9c17e97d8d8179defdb6e03cd9ddc8f/kvm-all.c:1648
> #2 0x00007f90395e98e7 in kvm_cpu_exec (env=0x7f903ae0bb20) at
> /tmp/qemu-0b3f79b9e9c17e97d8d8179defdb6e03cd9ddc8f/kvm-all.c:1535
> #3 0x00007f90395a7167 in qemu_kvm_cpu_thread_fn (arg=<optimized
> out>)
> at /tmp/qemu-0b3f79b9e9c17e97d8d8179defdb6e03cd9ddc8f/cpus.c:757
> #4 0x00007f9036adb98c in ?? () from /lib/libpthread.so.0
> #5 0x00007f903682bfcd in clone () from /lib/libc.so.6
>
> Thread 1 (LWP 3178):
> #0 ring_add (item=<optimized out>, ring=<optimized out>) at
> ../spice-common/common/ring.h:61
> #1 ring_add_after (pos=<optimized out>, item=<optimized out>) at
> ../spice-common/common/ring.h:66
> #2 __current_add_drawable (pos=<optimized out>, drawable=<optimized
> out>, worker=<optimized out>) at red_worker.c:2351
> #3 red_current_add (worker=0x7f903b0298b0, ring=0x7f9010022ef8,
> drawable=0x7f903b1e91e8) at red_worker.c:3479
> #4 0x00007f90371c5f13 in red_current_add_qxl
> (red_drawable=<optimized
> out>, ring=<optimized out>, worker=<optimized out>,
> drawable=<optimized out>) at red_worker.c:3612
> #5 red_process_drawable (group_id=<optimized out>,
> drawable=<optimized out>, worker=<optimized out>) at
> red_worker.c:3953
> #6 red_process_commands (worker=0x7f903b0298b0,
> max_pipe_size=<optimized out>, ring_is_empty=0x7f90180d5ccc) at
> red_worker.c:4902
> #7 0x00007f90371c7fa5 in red_worker_main (arg=<optimized out>)
> at
> red_worker.c:11778
> #8 0x00007f9036adb98c in ?? () from /lib/libpthread.so.0
> #9 0x00007f903682bfcd in clone () from /lib/libc.so.6
Thanks for the work producing the backtrace, unfortunately I can't think of anything at the moment. I'd like to see the history of the ring adds but that's of course impossible. Valgrind would be awesome, but it requires compiling libssl specifically to avoid a ton of false warnings from valgrind (even if you don't use the tls port of spice). See http://www.openssl.org/support/faq.html#PROG14 if you are willing to go this extra mile.
>
>
> 2012/9/5 nicolas prochazka <prochazka.nicolas at gmail.com>:
> > Hello,
> > With the help of Alon, i can produce debug information :
> >
> > Core was generated by `/usr/local/bin/qemu -name xpvirtser001
> > -readconfig /etc/ich9-ehci-uhci.cfg -dev'.
> > Program terminated with signal 11, Segmentation fault.
> > #0 ring_add (item=<optimized out>, ring=<optimized out>) at
> > ../spice-common/common/ring.h:61
> > 61 ring->next = item->next->prev = item;
> >
> >
> > Regards,
> > Nicolas
> >
> > 2012/9/4 Alon Levy <alevy at redhat.com>:
> >>> hello
> >>> libspice 0.11.3
> >>> qemu 1.2rc2
> >>>
> >>> In windows XP Guest VM ,
> >>> Change screensaver ( with small preview windows change)
> >>> causes a segfault in libspice server .
> >>>
> >>> I can always reproduce it ,
> >>> two logs juste before segfault.
> >>>
> >>>
> >>> usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (0, 0) (194, 21)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:2030:red_clear_surface_drawables_from_pipe: surface
> >>> 19
> >>> dependent item found 0x7fdb3a46ae10, 0x7fdb3b132150
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (165, 455) (359,
> >>> 613)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 7: area ==>
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (5, 0) (199, 158)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:2030:red_clear_surface_drawables_from_pipe: surface
> >>> 7
> >>> dependent item found 0x7fdb3a46ccb0, 0x7fdb3ac64ce0
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (168, 437) (339,
> >>> 452)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 19: area ==>
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (3, 3) (174, 18)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:2030:red_clear_surface_drawables_from_pipe: surface
> >>> 19
> >>> dependent item found 0x7fdb3a46c818, 0x7fdb3ac987e0
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:2633:red_display_detach_stream_gracefully: stream
> >>> 49:
> >>> upgrade by screenshot. has current 0. box ==>
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (257, 265) (409,
> >>> 377)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (257, 265) (409,
> >>> 377)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:2674:red_detach_streams_behind: stream 49
> >>> (/usr/local/bin/qemu:11553): Spice-Debug **:
> >>> red_dispatcher.c:309:async_command_alloc: 0x7fdaa007f4b0
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 7: area ==>
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (0, 0) (32, 32)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:11443:worker_handle_dispatcher_async_done:
> >>> (/usr/local/bin/qemu:11553): Spice-Debug **:
> >>> red_dispatcher.c:960:red_dispatcher_async_complete:
> >>> 0x7fdaa007f4b0:
> >>> cookie 140576964702000
> >>> (/usr/local/bin/qemu:11553): Spice-Debug **:
> >>> red_dispatcher.c:962:red_dispatcher_async_complete: no more async
> >>> commands
> >>> (/usr/local/bin/qemu:11553): Spice-Debug **:
> >>> red_dispatcher.c:309:async_command_alloc: 0x7fdaa00b6f30
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 20: area ==>
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (0, 0) (16, 16)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:11443:worker_handle_dispatcher_async_done:
> >>> (/usr/local/bin/qemu:11553): Spice-Debug **:
> >>> red_dispatcher.c:960:red_dispatcher_async_complete:
> >>> 0x7fdaa00b6f30:
> >>> cookie 140576964474032
> >>> (/usr/local/bin/qemu:11553): Spice-Debug **:
> >>> red_dispatcher.c:962:red_dispatcher_async_complete: no more async
> >>> commands
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (472, 596) (547,
> >>> 619)
> >>> (/usr/local/bin/qemu:11553): SpiceWorker-ERROR **:
> >>> ../spice-common/common/ring.h:83:ring_remove: assertion
> >>> `item->next
> >>> !=
> >>> NULL && item->prev != NULL' failed
> >>> Aborted
> >>>
> >>>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (165, 434) (359,
> >>> 455)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 22: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (0, 0) (194, 21)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:2030:red_clear_surface_drawables_from_pipe: surface
> >>> 22
> >>> dependent item found 0x7f67c1181838, 0x7f6728484650
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (168, 435) (358,
> >>> 454)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 22: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (3, 1) (193, 20)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:2030:red_clear_surface_drawables_from_pipe: surface
> >>> 22
> >>> dependent item found 0x7f67c117e738, 0x7f672809f6e0
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 8: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (5, 0) (199, 158)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (165, 455) (359,
> >>> 613)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (165, 455) (359,
> >>> 613)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 25: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (0, 0) (194, 158)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:2030:red_clear_surface_drawables_from_pipe: surface
> >>> 25
> >>> dependent item found 0x7f67c11813a0, 0x7f672806db10
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (341, 435) (358,
> >>> 454)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 22: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (176, 1) (193, 20)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:2030:red_clear_surface_drawables_from_pipe: surface
> >>> 22
> >>> dependent item found 0x7f67c117e118, 0x7f67280ab110
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (165, 434) (359,
> >>> 455)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 10: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (0, 0) (194, 21)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:2030:red_clear_surface_drawables_from_pipe: surface
> >>> 10
> >>> dependent item found 0x7f67c11bd540, 0x7f6728189b90
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (165, 455) (359,
> >>> 613)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 8: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (5, 0) (199, 158)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:2030:red_clear_surface_drawables_from_pipe: surface
> >>> 8
> >>> dependent item found 0x7f67c11bd540, 0x7f67285e68c0
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (168, 437) (339,
> >>> 452)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 10: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (3, 3) (174, 18)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:2030:red_clear_surface_drawables_from_pipe: surface
> >>> 10
> >>> dependent item found 0x7f67c1181838, 0x7f67281b6310
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:10258:display_channel_release_item: not pushed (101)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:2633:red_display_detach_stream_gracefully: stream
> >>> 49:
> >>> upgrade by screenshot. has current 0. box ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (257, 265) (409,
> >>> 377)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:4593:red_update_area: surface 0: area ==>
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> ../spice-common/common/rect.h:91:rect_debug: (257, 265) (409,
> >>> 377)
> >>> (/usr/local/bin/qemu:21130): SpiceWorker-Debug **:
> >>> red_worker.c:2674:red_detach_streams_behind: stream 49
> >>> Segmentation fault
> >>>
> >>
> >> Hi Nicolas,
> >>
> >> Thanks for the report (s), can you please provide a stacktrace of
> >> qemu when it segfaults?
> >> Simplest way differs depending on how you run it:
> >> 1) standalone - you launch qemu directly. Then run it under gdb:
> >> gdb --args qemu...
> >> r
> >> <do what leads to segfault>
> >> thread apply all bt
> >> 2) you launch qemu via libvirt / any other means.
> >> launch qemu normally
> >> if this is the only copy of qemu that is running, you can
> >> launch:
> >> gdb -p `pgrep qemu`
> >> if you have more then one, you'll need to identify the pid
> >> yourself.
> >> <do what leads to segfault>
> >> thread apply all bt
> >>
> >> Alon
> >>
> >>>
> >>>
> >>> Regards,
> >>> Nicolas
> >>> _______________________________________________
> >>> Spice-devel mailing list
> >>> Spice-devel at lists.freedesktop.org
> >>> http://lists.freedesktop.org/mailman/listinfo/spice-devel
> >>>
>
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