[lttng-dev] Core dump with LTTng Tools v2.1.1

[Bernd Hufmann]

Hello

When executing the command "lttng list -k" and I get a core dump with 
the output below. This happens not all the time, but when it happens I 
have to kill the lttng-sessiond and restart the lttng-sessiond. I 
attached the core dump.  Could someone of the LTTng team look into this?

My computer has Ubuntu 12.04 with kernel 3.2.0-29. I've installed LTTng 
modules v2.1.1, LTTng-UST v2.1.1 and userspace-rcu v0.7.6.

Thanks
Bernd

lttng list -k
Kernel events:
-------------
       mm_vmscan_kswapd_sleep (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       mm_vmscan_kswapd_wake (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       mm_vmscan_wakeup_kswapd (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       mm_vmscan_direct_reclaim_begin (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       mm_vmscan_memcg_reclaim_begin (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       mm_vmscan_memcg_softlimit_reclaim_begin (loglevel: TRACE_EMERG 
(0)) (type: tracepoint)
       mm_vmscan_direct_reclaim_end (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       mm_vmscan_memcg_reclaim_end (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       mm_vmscan_memcg_softlimit_reclaim_end (loglevel: TRACE_EMERG (0)) 
(type: tracepoint)
       mm_shrink_slab_start (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       mm_shrink_slab_end (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       mm_vmscan_lru_isolate (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       mm_vmscan_memcg_isolate (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       mm_vmscan_writepage (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       mm_vmscan_lru_shrink_inactive (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       replace_swap_token (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       put_swap_token (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       disable_swap_token (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       update_swap_token_priority (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       udp_fail_queue_rcv_skb (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       timer_init (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       timer_start (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       timer_expire_entry (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       timer_expire_exit (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       timer_cancel (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       hrtimer_init (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       hrtimer_start (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       hrtimer_expire_entry (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       hrtimer_expire_exit (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       hrtimer_cancel (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       itimer_state (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       itimer_expire (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       lttng_statedump_start (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       lttng_statedump_end (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       lttng_statedump_process_state (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       lttng_statedump_file_descriptor (loglevel: TRACE_EMERG (0)) 
(type: tracepoint)
       lttng_statedump_vm_map (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       lttng_statedump_network_interface (loglevel: TRACE_EMERG (0)) 
(type: tracepoint)
       lttng_statedump_interrupt (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       sock_rcvqueue_full (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sock_exceed_buf_limit (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kfree_skb (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       consume_skb (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       skb_copy_datagram_iovec (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       signal_generate (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       signal_deliver (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       signal_overflow_fail (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       signal_lose_info (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       scsi_dispatch_cmd_start (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       scsi_dispatch_cmd_error (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       scsi_dispatch_cmd_done (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       scsi_dispatch_cmd_timeout (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       scsi_eh_wakeup (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_kthread_stop (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_kthread_stop_ret (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       sched_wakeup (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_wakeup_new (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_switch (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_migrate_task (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_process_free (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_process_exit (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_wait_task (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_process_wait (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_process_fork (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_stat_wait (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_stat_sleep (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_stat_iowait (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_stat_runtime (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       sched_pi_setprio (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       regulator_enable (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       regulator_enable_delay (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       regulator_enable_complete (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       regulator_disable (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       regulator_disable_complete (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       regulator_set_voltage (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       regulator_set_voltage_complete (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
        (type: noop)
       cpu_frequency (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       machine_suspend (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       power_start (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       power_frequency (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       power_end (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       clock_enable (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       clock_disable (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       clock_set_rate (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       power_domain_target (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       net_dev_xmit (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       net_dev_queue (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       netif_receive_skb (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       netif_rx (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       napi_poll (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       module_load (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       module_free (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       module_get (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       module_put (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       module_request (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kvm_userspace_exit (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kvm_set_irq (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kvm_msi_set_irq (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kvm_ack_irq (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kvm_mmio (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kvm_fpu (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kvm_age_page (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kvm_try_async_get_page (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       kvm_async_pf_doublefault (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       kvm_async_pf_not_present (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       kvm_async_pf_ready (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kvm_async_pf_completed (loglevel: TRACE_EMERG (0)) (type: 
tracepoint)
       kmalloc (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kmem_cache_alloc (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kmalloc_node (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kmem_cache_alloc_node (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kfree (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       kmem_cache_free (loglevel: TRACE_EMERG (0)) (type: tracepoint)
       mm_page_free_direct (loglevel: TRACE_EMERG (0)) (type: tracepoint)
lttng: commands/list.c:253: print_events: Assertion `0' failed.
Aborted (core dumped)
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