<font size=2 face="sans-serif">Hello,</font>
<br>
<br><font size=2 face="sans-serif">I've deployed 2.2.0rc2 on one of our
systems, and I've getting a core dump (due to segfault) on lttng-sessiond.</font>
<br>
<br><font size=2 face="sans-serif">Should I post all the data here, or
should this be done 1x1 with one of the developers?</font>
<br>
<br><font size=2 face="sans-serif">Anyway, basic information:</font>
<br>
<br><tt><font size=2>Core was generated by `/usr/bin/lttng-sessiond -d
--no-kernel -q'.</font></tt>
<br><tt><font size=2>Program terminated with signal 11, Segmentation fault.</font></tt>
<br><tt><font size=2>#0 ustctl_duplicate_ust_object_data (dest=dest@entry=0x7f958c000ad8,
src=0x0) at ustctl.c:800</font></tt>
<br><tt><font size=2>800 if (src->handle
!= -1) {</font></tt>
<br><tt><font size=2>(gdb) p *dest</font></tt>
<br><tt><font size=2>$9 = (struct lttng_ust_object_data *) 0x0</font></tt>
<br><tt><font size=2>(gdb) up</font></tt>
<br><tt><font size=2>#1 0x00000000004182c6 in duplicate_channel_object
(ua_chan=0x7f958c0009b0, reg_chan=0x679cd0) at ust-app.c:2000</font></tt>
<br><tt><font size=2>2000 ret
= ustctl_duplicate_ust_object_data(&ua_chan->obj, reg_chan->obj.ust);</font></tt>
<br><tt><font size=2>(gdb) p ua_chan->obj</font></tt>
<br><tt><font size=2>$10 = (struct lttng_ust_object_data *) 0x0</font></tt>
<br><tt><font size=2>(gdb) p *ua_chan</font></tt>
<br><tt><font size=2>$11 = {enabled = 1, handle = -1, is_sent = 0, key
= 2, tracing_channel_id = 0, expected_stream_count = 0, name = "channel0",
'\000' <repeats 247 times>, obj = 0x0, attr = {</font></tt>
<br><tt><font size=2> type = LTTNG_UST_CHAN_PER_CPU, subbuf_size
= 262144, num_subbuf = 32, overwrite = 0, switch_timer_interval = 0, read_timer_interval
= 0, output = LTTNG_UST_MMAP, chan_id = 0, </font></tt>
<br><tt><font size=2> uuid = '\000' <repeats 15 times>},
streams = {count = 0, head = {next = 0x7f958c000b20, prev = 0x7f958c000b20}},
session = 0x677320, ctx = 0x7f958c000bc0, events = 0x7f958c000920, </font></tt>
<br><tt><font size=2> tracefile_size = 0, tracefile_count = 0, node
= {key = 0x7f958c0009d4 "channel0", node = {next = 0x6763a0,
reverse_hash = 261524217965576192}, head = {next = {next = 0x0}, func =
0}}, </font></tt>
<br><tt><font size=2> ust_objd_node = {key = 0, node = {next = 0x0,
reverse_hash = 0}, head = {next = {next = 0x0}, func = 0}}, rcu_head =
{next = {next = 0x0}, func = 0}}</font></tt>
<br><tt><font size=2>(gdb) p *reg_chan</font></tt>
<br><tt><font size=2>$12 = {key = 0, consumer_key = 1, streams = {next
= 0x679ce0, prev = 0x679ce0}, stream_list_lock = {__data = {__lock = 0,
__count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, </font></tt>
<br><tt><font size=2> __list = {__prev = 0x0, __next
= 0x0}}, __size = '\000' <repeats 39 times>, __align = 0}, node =
{key = 0, node = {next = 0x0, reverse_hash = 15577886586086949907}, head
= {next = {</font></tt>
<br><tt><font size=2> next = 0x0}, func = 0}},
obj = {ust = 0x0}}</font></tt>
<br><tt><font size=2>(gdb) bt</font></tt>
<br><tt><font size=2>#0 ustctl_duplicate_ust_object_data (dest=dest@entry=0x7f958c000ad8,
src=0x0) at ustctl.c:800</font></tt>
<br><tt><font size=2>#1 0x00000000004182c6 in duplicate_channel_object
(ua_chan=0x7f958c0009b0, reg_chan=0x679cd0) at ust-app.c:2000</font></tt>
<br><tt><font size=2>#2 send_channel_uid_to_ust (reg_chan=reg_chan@entry=0x679cd0,
app=app@entry=0x664d00, ua_sess=ua_sess@entry=0x677320, ua_chan=ua_chan@entry=0x7f958c0009b0)
at ust-app.c:2161</font></tt>
<br><tt><font size=2>#3 0x0000000000418f78 in create_channel_per_uid
(ua_chan=0x7f958c0009b0, ua_sess=0x677320, usess=<optimized out>,
app=0x664d00) at ust-app.c:2263</font></tt>
<br><tt><font size=2>#4 do_create_channel (app=app@entry=0x664d00,
usess=usess@entry=0x666f80, ua_sess=0x677320, ua_chan=ua_chan@entry=0x7f958c0009b0)
at ust-app.c:2341</font></tt>
<br><tt><font size=2>#5 0x000000000041df83 in ust_app_global_update
(usess=0x666f80, sock=sock@entry=20) at ust-app.c:4043</font></tt>
<br><tt><font size=2>#6 0x000000000042306f in update_ust_app (app_sock=20)
at main.c:680</font></tt>
<br><tt><font size=2>#7 thread_dispatch_ust_registration (data=<optimized
out>) at main.c:1465</font></tt>
<br><tt><font size=2>#8 0x00007f95974dd5f0 in start_thread () from
/lib64/libpthread.so.0</font></tt>
<br><tt><font size=2>#9 0x00007f959724c87d in clone () from /lib64/libc.so.6</font></tt>
<br><tt><font size=2>#10 0x0000000000000000 in ?? ()</font></tt>
<br><tt><font size=2>(gdb) info threads</font></tt>
<br><tt><font size=2> Id Target Id
Frame </font></tt>
<br><tt><font size=2> 9 Thread 0x7f9594357710 (LWP 967)
0x00007f959724cf03 in epoll_wait () from /lib64/libc.so.6</font></tt>
<br><tt><font size=2> 8 Thread 0x7f9594558710 (LWP 966)
0x00007f959724cf03 in epoll_wait () from /lib64/libc.so.6</font></tt>
<br><tt><font size=2> 7 Thread 0x7f9593b53710 (LWP 971)
0x00007f959724cf03 in epoll_wait () from /lib64/libc.so.6</font></tt>
<br><tt><font size=2> 6 Thread 0x7f9593f55710 (LWP 969)
0x00007f959724cf03 in epoll_wait () from /lib64/libc.so.6</font></tt>
<br><tt><font size=2> 5 Thread 0x7f9598d85900 (LWP 964)
0x00007f95974ddda5 in pthread_join () from /lib64/libpthread.so.0</font></tt>
<br><tt><font size=2> 4 Thread 0x7f9593952710 (LWP 984)
0x00007f959724cf03 in epoll_wait () from /lib64/libc.so.6</font></tt>
<br><tt><font size=2> 3 Thread 0x7f9593751710 (LWP 3941)
0x00007f95972492a9 in syscall () from /lib64/libc.so.6</font></tt>
<br><tt><font size=2> 2 Thread 0x7f9593d54710 (LWP 970)
0x00007f959724cf03 in epoll_wait () from /lib64/libc.so.6</font></tt>
<br><tt><font size=2>* 1 Thread 0x7f9594156710 (LWP 968) ustctl_duplicate_ust_object_data
(dest=dest@entry=0x7f958c000ad8, src=0x0) at ustctl.c:800</font></tt>
<br>
<br><font size=2 face="sans-serif">Any help is appreciated.</font>
<br>
<br>
<br><font size=2 color=#000080 face="sans-serif">Amit Margalit</font>
<br><font size=2 color=#808000 face="sans-serif">IBM XIV </font><font size=2 face="sans-serif">-
<i>Storage Reinvented</i></font>
<br><font size=2 face="sans-serif">XIV-NAS Development Team</font>
<br><font size=2 face="sans-serif">Tel. 03</font><font size=2 face="Arial">-689-7774</font>
<br><font size=2 face="Arial">Fax. 03-689-7230</font>