<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div><br></div><span id="zwchr" data-marker="__DIVIDER__">----- On Oct 7, 2016, at 6:46 AM, Aravind HT <aravind.ht@gmail.com> wrote:<br></span><div data-marker="__QUOTED_TEXT__"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><div dir="ltr"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Hi,</span><div><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><br></span></div><div><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">I am encountering a few crashes which are all happening around the hash table functions, the below are from my 2.6 version for which I have reproduced them with debug symbols enabled.</span></div></div></blockquote><div><br></div><div>Hi Aravind,<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>We do not support LTTng 2.6 anymore. Let us know if you can reproduce with<br data-mce-bogus="1"></div><div>LTTng 2.8 or master.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Thanks,<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Mathieu<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><div dir="ltr"><div><p class="MsoNormal"><b><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">2.6 SCENARIO
1</span></b></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">(gdb)
bt</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Python
Exception <type 'exceptions.ImportError'> No module named gdb.frames:</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#0
lttng_ht_lookup (ht=0x6888f0, key=key@entry=0x4b,
iter=iter@entry=0x7f318fffeae0) at hashtable.c:236</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#1
0x0000000000429900 in ust_app_unregister (sock=sock@entry=75) at ust-app.c:3105</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#2
0x000000000043918a in thread_manage_apps (data=<optimized out>) at
main.c:1558</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#3
0x00007f3197c74294 in start_thread (arg=0x7f318ffff700) at pthread_create.c:336</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#4
0x00007f31979b213d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"> </span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><b>2.6 </b><b>SCENARIO
2 : Not sure why cmd_init() gets called here </b></span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#0
0x00007f024d68fd2c in lttng_cds_lfht_lookup (ht=0x68ac90,
hash=8123239074643410387, match=0x418be2 <ht_match_reg_uid>,
key=0x7f023affb8a0, iter=0x7f023affb900) at rculfhash.c:1535</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#1
0x0000000000418be2 in cmd_init () at cmd.c:3332</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#2
0x00000000004191e3 in buffer_reg_uid_find (session_id=<optimized out>,
bits_per_long=64, uid=0) at buffer-registry.c:198</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#3
0x000000000042df89 in ust_consumer_metadata_request (socket=socket@entry=0x67f1f0
<ustconsumer64_data+176>) at ust-consumer.c:464</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#4
0x000000000043b0e6 in thread_manage_consumer (data=0x67f140
<ustconsumer64_data>) at main.c:1353</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#5
0x00007f024c4ae294 in start_thread (arg=0x7f023affd700) at pthread_create.c:336</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#6
0x00007f024c1ec13d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">(gdb)</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"> </span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><b>2.6 </b><b>SCENARIO
3</b></span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">(gdb)
bt</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#0
0x00007f444c017740 in ?? ()</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#1
0x00007f44676a9b6b in bucket_at (index=<optimized out>,
ht=0x7f444c00d4e0) at rculfhash.c:853</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#2
lookup_bucket (hash=4405530133935945645, size=<optimized out>,
ht=0x7f444c00d4e0) at rculfhash.c:861</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#3
lttng_cds_lfht_lookup (ht=0x7f444c00d4e0, hash=4405530133935945645,
match=0x7f44676a7980 <match_ulong>, key=0x29,
iter=iter@entry=0x7f44613d59d0) at rculfhash.c:1542</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#4
0x00007f44676a7e20 in lttng_ht_lookup (ht=<optimized out>,
key=<optimized out>, iter=iter@entry=0x7f44613d59d0) at hashtable.c:240</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#5
0x0000000000412217 in consumer_find_socket (key=<optimized out>,
consumer=<optimized out>) at consumer.c:359</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#6
0x0000000000000000 in ?? ()</span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><br></span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">I am also trying to upgrade to 2.8.1 and see similar crashes there, unfortunately do not have debug symbols enabled, but crashes always in one of the hash table related functions.</span></p><div><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">I'm in the process of enabling debug symbols on 2.8.1 so that the info that i provide applies to the current version, also trying out Valgrind.</span></div><div><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><br></span></div><div><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Let me know if you can figure something out with this.</span></div><div><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><br></span></div><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><b>2.8.1 SCENARIO 1</b> </span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">GNU gdb (GDB) 7.8.1</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Copyright (C) 2014 Free Software Foundation, Inc.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">License GPLv3+: GNU GPL version 3 or later <<a href="http://gnu.org/licenses/gpl.html" target="_blank">http://gnu.org/licenses/gpl.html</a>></span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">This is free software: you are free to change and redistribute
it.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">There is NO WARRANTY, to the extent permitted by law. Type
"show copying"</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">and "show warranty" for details.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">This GDB was configured as "x86_64-poky-linux".</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Type "show configuration" for configuration details.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">For bug reporting instructions, please see:</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><<a href="http://www.gnu.org/software/gdb/bugs/" target="_blank">http://www.gnu.org/software/gdb/bugs/</a>>.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Find the GDB manual and other documentation resources online at:</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><<a href="http://www.gnu.org/software/gdb/documentation/" target="_blank">http://www.gnu.org/software/gdb/documentation/</a>>.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">For help, type "help".</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Type "apropos word" to search for commands related to
"word"...</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Reading symbols from /usr/bin/lttng-sessiond...(no debugging
symbols found)...done.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1134]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1090]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1091]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1092]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1093]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1095]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1098]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1102]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1110]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1096]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1094]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 1097]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"> </span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">warning: Could not load shared library symbols for
linux-vdso.so.1.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Do you need "set solib-search-path" or "set
sysroot"?</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[Thread debugging using libthread_db enabled]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Using host libthread_db library
"/lib64/libthread_db.so.1".</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Core was generated by `/usr/bin/lttng-sessiond
--consumerd32-path /usr/lib/lttng/libexec/lttng-consume'.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Program terminated with signal SIGSEGV, Segmentation fault.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#0 0x0000000000000000 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">(gdb) bt</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Python Exception <type 'exceptions.ImportError'> No module
named gdb.frames: </span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#0 0x0000000000000000 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#1 0x00007f1b39b1db6b in lttng_cds_lfht_lookup () from
/usr/lib64/liblttng-ctl.so.0</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#2 0x0000000000412217 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#3 0x0000000000412263 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#4 0x0000000000427de8 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#5 0x0000000000427ed1 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#6 0x00000000004280d3 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#7 0x00007f1b398facad in ?? () from
/usr/lib64/liburcu.so.2</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#8 0x00007f1b3893d294 in start_thread (arg=0x7f1b1e7fc700)
at pthread_create.c:336</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#9 0x00007f1b3867b13d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">(gdb) q</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><br></span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><br></span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><br></span></span></p><p class="MsoNormal"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><b style="background-color:rgb(255,255,255)">2.8.1 SCENARIO 2</b></span></p><div><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><br></span></div><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">GNU gdb (GDB) 7.8.1<br></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Copyright (C) 2014 Free Software Foundation, Inc.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">License GPLv3+: GNU GPL version 3 or later <<a href="http://gnu.org/licenses/gpl.html" target="_blank">http://gnu.org/licenses/gpl.html</a>></span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">This is free software: you are free to change and redistribute
it.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">There is NO WARRANTY, to the extent permitted by law. Type
"show copying"</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">and "show warranty" for details.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">This GDB was configured as "x86_64-poky-linux".</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Type "show configuration" for configuration details.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">For bug reporting instructions, please see:</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><<a href="http://www.gnu.org/software/gdb/bugs/" target="_blank">http://www.gnu.org/software/gdb/bugs/</a>>.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Find the GDB manual and other documentation resources online at:</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><<a href="http://www.gnu.org/software/gdb/documentation/" target="_blank">http://www.gnu.org/software/gdb/documentation/</a>>.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">For help, type "help".</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Type "apropos word" to search for commands related to
"word"...</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Reading symbols from /usr/bin/lttng-sessiond...(no debugging
symbols found)...done.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 637]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 610]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 613]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 624]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 605]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 608]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 607]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 609]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 612]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 606]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 611]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[New LWP 616]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"> </span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">warning: Could not load shared library symbols for
linux-vdso.so.1.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Do you need "set solib-search-path" or "set
sysroot"?</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">[Thread debugging using libthread_db enabled]</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Using host libthread_db library
"/lib64/libthread_db.so.1".</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Core was generated by `/usr/bin/lttng-sessiond
--consumerd32-path /usr/lib/lttng/libexec/lttng-consume'.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Program terminated with signal SIGSEGV, Segmentation fault.</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#0 0x0000000000000020 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">(gdb) bt</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Python Exception <type 'exceptions.ImportError'> No module
named gdb.frames: </span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#0 0x0000000000000020 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#1 0x00007ff010197e02 in lttng_ht_lookup () from
/usr/lib64/liblttng-ctl.so.0</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#2 0x0000000000412217 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#3 0x0000000000412263 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#4 0x0000000000427de8 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#5 0x0000000000427ed1 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#6 0x00000000004280d3 in ?? ()</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#7 0x00007ff00ff76cad in ?? () from
/usr/lib64/liburcu.so.2</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#8 0x00007ff00efb9294 in start_thread (arg=0x7ff0096c5700)
at pthread_create.c:336</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">#9 0x00007ff00ecf713d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109</span></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><span data-mce-style="color: #000000; font-family: times new roman,serif;" style="color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">(gdb) q</span></span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><br></span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif"><br></span></p><p class="MsoNormal"><span data-mce-style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" style="background-color: #ffffff; color: #000000; font-family: times new roman,serif;" color="#000000" face="times new roman, serif">Regards,<br>Aravind.</span></p></div></div><br>_______________________________________________<br>lttng-dev mailing list<br>lttng-dev@lists.lttng.org<br>https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev<br></blockquote></div><br><div data-marker="__SIG_POST__">-- <br></div><div>Mathieu Desnoyers<br>EfficiOS Inc.<br>http://www.efficios.com</div></div></body></html>