On Mon, 2007-02-05 at 19:45 +0100, Gwenole Beauchesne wrote:
> Hi,
>
> > It seems to be segfaulting a lot on me...although it seems to run OK
> > for at least a while. In fact, according to dmesg it is crashing with
> > signal 6 (SIGABRT). Any ideas as to what is causing this?
>
> It could be an explicit abort() or an uncaught C++ exception (which I
> doubt vbox is using). Could you detail under which conditions you get
> the crash (e.g. which OS guest, what lead to the crash, etc.)? Besides,
> an interesting x86_64 kernel feature is that it also prints the RIP for
> such crashes. So you could simply use it in gdb (or addrline?) to get
> the sources location, provided you kept the debug symbols.
The crash seems to happen (reliably) after a certain amount of time. No
idea what is causing it, but a backtrace is below. I have seen this
reproducibly happen with both WinXP and Debian Etch guests, but this
particular trace is from an XP SP2 guest.
Program received signal SIGSEGV, Segmentation fault.
0x00002b380c44cdde in __lll_mutex_timedlock_wait ()
from /lib/libpthread.so.0
(gdb) where
#0 0x00002b380c44cdde in __lll_mutex_timedlock_wait ()
from /lib/libpthread.so.0
#1 0x00002b380c449ae1 in _L_mutex_timedlock_55 ()
from /lib/libpthread.so.0
#2 0x00002b380c449366 in pthread_mutex_timedlock ()
from /lib/libpthread.so.0
#3 0x00002b380c596a3e in rtSemEventWait (EventSem=0x6f2f80,
cMillies=2,
fAutoResume=true)
at /home/andrew/documents/src/vbox/src/VBox/Runtime/r3/posix/sems-posix.cpp:395
#4 0x00002b380c92abf1 in VMR3WaitHalted (pVM=0x2aaaababf000,
fIgnoreInterrupts=176)
at /home/andrew/documents/src/vbox/src/VBox/VMM/VMEmt.cpp:366
#5 0x00002b380c947fa1 in EMR3ExecuteVM (pVM=0x2aaaababf000)
at /home/andrew/documents/src/vbox/src/VBox/VMM/EM.cpp:3418
#6 0x00002b380c92a9f0 in vmR3EmulationThread (ThreadSelf=0x6b91a0,
pvArgs=0x1e7cb0)
at /home/andrew/documents/src/vbox/src/VBox/VMM/VMEmt.cpp:137
#7 0x00002b380c58d9c4 in rtThreadMain (pThread=0x6b91a0,
NativeThread=1998000)
at /home/andrew/documents/src/vbox/src/VBox/Runtime/thread.cpp:592
#8 0x00002b380c59778a in rtThreadNativeMain (pvArgs=0x0)
at
/home/andrew/documents/src/vbox/src/VBox/Runtime/r3/posix/thread-posix.cpp:136
#9 0x00002b380c4464a5 in start_thread () from /lib/libpthread.so.0
#10 0x00002b380d4483fd in clone () from /lib/libc.so.6
---Type <return> to continue, or q <return> to quit---
#11 0x0000000000000000 in ?? ()
Side question:
Should we move this discussion to vbox-devel? Perhaps this list has
people more interested in what is going on here...
Andrew
> Regards,
> Gwenolé.
_______________________________________________
vbox-users mailing list
[email protected]
http://vbox.innotek.de/mailman/listinfo/vbox-users
