puh, it did take a while, but meanwhile another segfault has occured,
which has nothing to do with the above one. due to the long time, it
took to happen, it might not be as reproducible as needed for efficient
debugging, at least I've currently no further time for this. I'll now
try V0.15.1 and hope, it will work well for me.
some gdb-info of the current segfault, if there's someone, who want to
have a look at:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fe086c46700 (LWP 30362)]
0x00007fe08c0639fc in ?? () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) thread apply all bt
Thread 6 (Thread 0x7fdfa2ecf700 (LWP 30793)):
#0 0x00007fe08c3963cb in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007fe08f581c79 in cond_timedwait (cond=0x7fe08fed6b20,
mutex=0x7fe08fed6ae0, ts=0x7fdfa2ecee10)
at posix-aio-compat.c:104
#2 0x00007fe08f5823f0 in aio_thread (unused=0x0) at posix-aio-compat.c:334
#3 0x00007fe08c391efc in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#4 0x00007fe08c0cc59d in __cmsg_nxthdr () from /lib/x86_64-linux-gnu/libc.so.6
#5 0x0000000000000000 in ?? ()
Thread 5 (Thread 0x7fe087648700 (LWP 30361)):
#0 0x00007fe08c399a73 in pwrite64 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007fe08f58201f in handle_aiocb_rw_linear (aiocb=0x7fe093c98e50,
buf=0x7fe093e05600
"\004\063\377\211t$\b\213\064$\213\034\272G\205\333\017\204\246") at
posix-aio-compat.c:216
#2 0x00007fe08f58212d in handle_aiocb_rw (aiocb=0x7fe093c98e50) at
posix-aio-compat.c:251
#3 0x00007fe08f582573 in aio_thread (unused=0x0) at posix-aio-compat.c:362
#4 0x00007fe08c391efc in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#5 0x00007fe08c0cc59d in __cmsg_nxthdr () from /lib/x86_64-linux-gnu/libc.so.6
#6 0x0000000000000000 in ?? ()
Thread 4 (Thread 0x7fe086c46700 (LWP 30362)):
#0 0x00007fe08c0639fc in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fe08c3851c0 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x00007fe086c45990 in ?? ()
#3 0x00007fe08c39bc20 in ?? () from /lib/x86_64-linux-gnu/libpthread.so.0
#4 0x00007fe086c469c0 in ?? ()
#5 0x0000000000000000 in ?? ()
Thread 3 (Thread 0x7fe086445700 (LWP 30363)):
#0 0x00007fe08c0c4747 in getmntent_r () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x0000000000000000 in ?? ()
Thread 2 (Thread 0x7fdfa36d0700 (LWP 30388)):
#0 0x00007fe08c3963cb in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007fe08f581c79 in cond_timedwait (cond=0x7fe08fed6b20,
mutex=0x7fe08fed6ae0, ts=0x7fdfa36cfe10)
at posix-aio-compat.c:104
#2 0x00007fe08f5823f0 in aio_thread (unused=0x0) at posix-aio-compat.c:334
#3 0x00007fe08c391efc in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#4 0x00007fe08c0cc59d in __cmsg_nxthdr () from /lib/x86_64-linux-gnu/libc.so.6
#5 0x0000000000000000 in ?? ()
Thread 1 (Thread 0x7fe08f3cd7a0 (LWP 30158)):
#0 0x00007fe08c0c5613 in getttyent () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00000000000f4140 in ?? ()
#2 0x00007fff62c7e3d0 in ?? ()
#3 0x0000001d8f675e5c in ?? ()
#4 0x00000000000003e8 in ?? ()
#5 0x0000000062c7e3c0 in ?? ()
#6 0x0000000062c7e440 in ?? ()
#7 0x0000000162c7e4c0 in ?? ()
#8 0x000000003c080980 in ?? ()
#9 0x0000000000000000 in ?? ()
(gdb)
all done on a ubuntu-11.10 64bit, last configure-options were:
'./configure' '--target-list=x86_64-softmmu i386-softmmu x86_64-linux-user
i386-linux-user' '--prefix=/usr' '--interp-prefix=/etc/qemu-binfmt/%M'
'--disable-blobs' '--disable-strip' '--audio-drv-list=pa,alsa,sdl,oss'
'--enable-vnc-sasl' '--enable-docs' '--enable-vhost-net' '--enable-attr'
'--enable-linux-aio' '--enable-uuid' '--enable-nptl'
'--enable-kvm-device-assignment' '--enable-kvm-pit' '--enable-kvm'
'--enable-curses' '--enable-vnc-png' '--enable-vnc-tls'
'--audio-card-list=ac97,es1370,sb16,cs4231a,adlib,gus,hda' '--enable-user'
'--enable-system' '--enable-linux-user' '--enable-bsd-user'
'--enable-guest-base' '--enable-darwin-user' --enable-debug
the segfault occures while installing a larger app within winxp+sp3 near
the possible end of setup
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https://bugs.launchpad.net/bugs/974229
Title:
qemu-kvm-1.0: segfault using vnc-console => not threadsafe!
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