[ltt-dev] lttv-gui crash

Tue May 17 12:37:46 EDT 2011

Hello all,

I am seeing lttv-gui consistently crashing with an assert() when parsing my traces and would like some help debugging the problem.

Thanks
Eric

emillbrandt-linux:/home/emillbrandt/trace# lttv-gui
** Message: statistics viewer : background computation data ready.
** Message: statistics viewer : background computation data ready.

(lttv.real:27120): GVFS-RemoteVolumeMonitor-WARNING **: cannot connect to the session bus: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

(lttv.real:27120): GVFS-RemoteVolumeMonitor-WARNING **: cannot connect to the session bus: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
** Message: event viewer : background computation data ready.
**
ERROR:tracecontext.c:1097:lttv_traceset_context_position_save: assertion failed: (tf_count < pos->tfcp->len)
/usr/local/bin/lttv-gui: line 10: 27120 Aborted                 $LTTV_CMD.real -m lttvwindow -m guievents -m guifilter -m guicontrolflow -m resourceview -m guistatistics -m guitracecontrol $*

Software Version Details:
Host
debian/amd64
lttv 0.12.36-18112010

Target
powerpc 2.6.33.7 + preempt_rt rt29 + lttng 0.216 + some hand merging of the two

The following lttng modules are loaded:
ipc-trace
kernel-trace
mm-trace
net-trace
fs-trace
syscall-trace
trap-trace
ltt-statedump
ltt-userspace-event

>ltt-armall
Connecting /mnt/debugfs/ltt/markers/userspace/event
Connecting /mnt/debugfs/ltt/markers/global_state/statedump_end
Connecting /mnt/debugfs/ltt/markers/irq_state/interrupt
Connecting /mnt/debugfs/ltt/markers/vm_state/vm_map
Connecting /mnt/debugfs/ltt/markers/fd_state/file_descriptor
Connecting /mnt/debugfs/ltt/markers/task_state/process_state
Connecting /mnt/debugfs/ltt/markers/fs/read
Connecting /mnt/debugfs/ltt/markers/fs/write
Connecting /mnt/debugfs/ltt/markers/fs/pollfd
Connecting /mnt/debugfs/ltt/markers/fs/select
Connecting /mnt/debugfs/ltt/markers/fs/writev
Connecting /mnt/debugfs/ltt/markers/fs/readv
Connecting /mnt/debugfs/ltt/markers/fs/pwrite64
Connecting /mnt/debugfs/ltt/markers/fs/pread64
Connecting /mnt/debugfs/ltt/markers/fs/llseek
Connecting /mnt/debugfs/ltt/markers/fs/lseek
Connecting /mnt/debugfs/ltt/markers/fs/close
Connecting /mnt/debugfs/ltt/markers/fs/open
Connecting /mnt/debugfs/ltt/markers/fs/ioctl
Connecting /mnt/debugfs/ltt/markers/fs/exec
Connecting /mnt/debugfs/ltt/markers/fs/buffer_wait_end
Connecting /mnt/debugfs/ltt/markers/fs/buffer_wait_start
Connecting /mnt/debugfs/ltt/markers/net/napi_poll
Connecting /mnt/debugfs/ltt/markers/net/napi_schedule
Connecting /mnt/debugfs/ltt/markers/net/udpv4_rcv
Connecting /mnt/debugfs/ltt/markers/net/tcpv4_rcv
Connecting /mnt/debugfs/ltt/markers/net/socket_recvmsg
Connecting /mnt/debugfs/ltt/markers/net/socket_sendmsg
Connecting /mnt/debugfs/ltt/markers/net/dev_receive
Connecting /mnt/debugfs/ltt/markers/net/dev_xmit
Connecting /mnt/debugfs/ltt/markers/net/napi_complete
Connecting /mnt/debugfs/ltt/markers/net/socket_call
Connecting /mnt/debugfs/ltt/markers/net/socket_shutdown
Connecting /mnt/debugfs/ltt/markers/net/socket_getsockopt
Connecting /mnt/debugfs/ltt/markers/net/socket_setsockopt
Connecting /mnt/debugfs/ltt/markers/net/socket_socketpair
Connecting /mnt/debugfs/ltt/markers/net/socket_getpeername
Connecting /mnt/debugfs/ltt/markers/net/socket_getsockname
Connecting /mnt/debugfs/ltt/markers/net/socket_accept
Connecting /mnt/debugfs/ltt/markers/net/socket_listen
Connecting /mnt/debugfs/ltt/markers/net/socket_connect
Connecting /mnt/debugfs/ltt/markers/net/socket_bind
Connecting /mnt/debugfs/ltt/markers/net/socket_create
Connecting /mnt/debugfs/ltt/markers/netif_state/network_ip_interface
Connecting /mnt/debugfs/ltt/markers/netif_state/network_ipv4_interface
Connecting /mnt/debugfs/ltt/markers/netif_state/insert_ifa_ipv6
Connecting /mnt/debugfs/ltt/markers/netif_state/del_ifa_ipv4
Connecting /mnt/debugfs/ltt/markers/netif_state/insert_ifa_ipv4
Connecting /mnt/debugfs/ltt/markers/mm/page_free
Connecting /mnt/debugfs/ltt/markers/mm/page_alloc
Connecting /mnt/debugfs/ltt/markers/mm/remove_from_page_cache
Connecting /mnt/debugfs/ltt/markers/mm/add_to_page_cache
Connecting /mnt/debugfs/ltt/markers/mm/huge_page_alloc
Connecting /mnt/debugfs/ltt/markers/mm/huge_page_free
Connecting /mnt/debugfs/ltt/markers/mm/wait_on_page_end
Connecting /mnt/debugfs/ltt/markers/mm/wait_on_page_start
Connecting /mnt/debugfs/ltt/markers/kernel/trap_entry
Connecting /mnt/debugfs/ltt/markers/kernel/trap_exit
Connecting /mnt/debugfs/ltt/markers/kernel/syscall_entry
Connecting /mnt/debugfs/ltt/markers/kernel/syscall_exit
Connecting /mnt/debugfs/ltt/markers/kernel/page_fault_get_user_entry
Connecting /mnt/debugfs/ltt/markers/kernel/page_fault_nosem_exit
Connecting /mnt/debugfs/ltt/markers/kernel/page_fault_nosem_entry
Connecting /mnt/debugfs/ltt/markers/kernel/page_fault_exit
Connecting /mnt/debugfs/ltt/markers/kernel/page_fault_entry
Connecting /mnt/debugfs/ltt/markers/kernel/timer_set
Connecting /mnt/debugfs/ltt/markers/kernel/sched_schedule
Connecting /mnt/debugfs/ltt/markers/kernel/sched_try_wakeup
Connecting /mnt/debugfs/ltt/markers/kernel/softirq_raise
Connecting /mnt/debugfs/ltt/markers/kernel/softirq_exit
Connecting /mnt/debugfs/ltt/markers/kernel/softirq_entry
Connecting /mnt/debugfs/ltt/markers/kernel/irq_exit
Connecting /mnt/debugfs/ltt/markers/kernel/irq_next_handler
Connecting /mnt/debugfs/ltt/markers/kernel/irq_entry
Connecting /mnt/debugfs/ltt/markers/kernel/process_wait
Connecting /mnt/debugfs/ltt/markers/kernel/panic
Connecting /mnt/debugfs/ltt/markers/kernel/page_fault_get_user_exit
Connecting /mnt/debugfs/ltt/markers/kernel/crash_kexec
Connecting /mnt/debugfs/ltt/markers/kernel/kernel_kexec
Connecting /mnt/debugfs/ltt/markers/kernel/module_load
Connecting /mnt/debugfs/ltt/markers/kernel/module_free
Connecting /mnt/debugfs/ltt/markers/kernel/vprintk
Connecting /mnt/debugfs/ltt/markers/kernel/printk
Connecting /mnt/debugfs/ltt/markers/kernel/timer_timeout
Connecting /mnt/debugfs/ltt/markers/kernel/timer_update_time
Connecting /mnt/debugfs/ltt/markers/kernel/timer_itimer_set
Connecting /mnt/debugfs/ltt/markers/kernel/timer_itimer_expired
Connecting /mnt/debugfs/ltt/markers/kernel/kthread_create
Connecting /mnt/debugfs/ltt/markers/kernel/process_fork
Connecting /mnt/debugfs/ltt/markers/kernel/process_exit
Connecting /mnt/debugfs/ltt/markers/kernel/process_free
Connecting /mnt/debugfs/ltt/markers/kernel/send_signal
Connecting /mnt/debugfs/ltt/markers/kernel/sched_migrate_task
Connecting /mnt/debugfs/ltt/markers/kernel/sched_wakeup_new_task
Connecting /mnt/debugfs/ltt/markers/kernel/sched_wait_task
Connecting /mnt/debugfs/ltt/markers/kernel/kthread_stop_ret
Connecting /mnt/debugfs/ltt/markers/kernel/kthread_stop
Connecting /mnt/debugfs/ltt/markers/kernel/tasklet_high_exit
Connecting /mnt/debugfs/ltt/markers/kernel/tasklet_high_entry
Connecting /mnt/debugfs/ltt/markers/kernel/tasklet_low_exit
Connecting /mnt/debugfs/ltt/markers/kernel/tasklet_low_entry
Connecting /mnt/debugfs/ltt/markers/ipc/call
Connecting /mnt/debugfs/ltt/markers/ipc/shm_create
Connecting /mnt/debugfs/ltt/markers/ipc/sem_create
Connecting /mnt/debugfs/ltt/markers/ipc/msg_create
Connecting /mnt/debugfs/ltt/markers/module_state/list_module
Connecting /mnt/debugfs/ltt/markers/softirq_state/softirq_vec

> /usr/bin/lttctl -C -o channel.all.overwrite=1 -o -w /root/traces/current trace
Linux Trace Toolkit Trace Control 0.87-09062010

Controlling trace : trace

lttctl: Creating trace
lttctl: Forking lttd
Linux Trace Toolkit Trace Daemon 0.87-09062010

Reading from debugfs directory : /mnt/debugfs/ltt/trace
Writing to trace directory : /root/traces/current

lttctl: Starting trace

> /usr/bin/lttctl -D -w /root/traces/current trace
Linux Trace Toolkit Trace Control 0.87-09062010

Controlling trace : trace

lttctl: Pausing trace
lttctl: Forking lttd
Linux Trace Toolkit Trace Daemon 0.87-09062010

Reading from debugfs directory : /mnt/debugfs/ltt/trace
Writing to trace directory : /root/traces/current

lttctl: Destroying trace

These options are enabled in the kernel build
> zcat /proc/config.gz | grep LTT
CONFIG_LTT=y
CONFIG_LTT_FILTER=m
# CONFIG_HAVE_LTT_DUMP_TABLES is not set
CONFIG_LTT_TRACER=y
CONFIG_LTT_RELAY_LOCKLESS=y
# CONFIG_LTT_RELAY_IRQOFF is not set
# CONFIG_LTT_RELAY_LOCKED is not set
CONFIG_LTT_SERIALIZE=y
CONFIG_LTT_FAST_SERIALIZE=y
CONFIG_LTT_TRACEPROBES=m
CONFIG_LTT_TRACE_CONTROL=y
# CONFIG_LTT_ALIGNMENT is not set
CONFIG_LTT_CHECK_ARCH_EFFICIENT_UNALIGNED_ACCESS=y
# CONFIG_LTT_DEBUG_EVENT_SIZE is not set
CONFIG_LTT_USERSPACE_EVENT=m
CONFIG_LTT_VMCORE=y
CONFIG_LTT_STATEDUMP=m
CONFIG_LTT_KPROBES=m
# CONFIG_LTT_ASCII is not set

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