<div dir="ltr"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">Hi,</font><div><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><br></font></div><div><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">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.</font></div><div><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><br></font></div><div><p class="MsoNormal"><b><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">2.6 SCENARIO
1<span></span></font></b></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">(gdb)
bt<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">Python
Exception <type 'exceptions.ImportError'> No module named gdb.frames:<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#0
lttng_ht_lookup (ht=0x6888f0, key=key@entry=0x4b,
iter=iter@entry=0x7f318fffeae0) at hashtable.c:236<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#1
0x0000000000429900 in ust_app_unregister (sock=sock@entry=75) at ust-app.c:3105<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#2
0x000000000043918a in thread_manage_apps (data=<optimized out>) at
main.c:1558<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#3
0x00007f3197c74294 in start_thread (arg=0x7f318ffff700) at pthread_create.c:336<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#4
0x00007f31979b213d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"> </font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><b>2.6 </b><b>SCENARIO
2 : Not sure why cmd_init() gets called here <span></span></b></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#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></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#1
0x0000000000418be2 in cmd_init () at cmd.c:3332<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#2
0x00000000004191e3 in buffer_reg_uid_find (session_id=<optimized out>,
bits_per_long=64, uid=0) at buffer-registry.c:198<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#3
0x000000000042df89 in ust_consumer_metadata_request (socket=socket@entry=0x67f1f0
<ustconsumer64_data+176>) at ust-consumer.c:464<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#4
0x000000000043b0e6 in thread_manage_consumer (data=0x67f140
<ustconsumer64_data>) at main.c:1353<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#5
0x00007f024c4ae294 in start_thread (arg=0x7f023affd700) at pthread_create.c:336<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#6
0x00007f024c1ec13d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">(gdb)<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"> </font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><b>2.6 </b><b>SCENARIO
3<span></span></b></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">(gdb)
bt<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#0
0x00007f444c017740 in ?? ()<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#1
0x00007f44676a9b6b in bucket_at (index=<optimized out>,
ht=0x7f444c00d4e0) at rculfhash.c:853<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#2
lookup_bucket (hash=4405530133935945645, size=<optimized out>,
ht=0x7f444c00d4e0) at rculfhash.c:861<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#3
lttng_cds_lfht_lookup (ht=0x7f444c00d4e0, hash=4405530133935945645,
match=0x7f44676a7980 <match_ulong>, key=0x29,
iter=iter@entry=0x7f44613d59d0) at rculfhash.c:1542<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#4
0x00007f44676a7e20 in lttng_ht_lookup (ht=<optimized out>,
key=<optimized out>, iter=iter@entry=0x7f44613d59d0) at hashtable.c:240<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#5
0x0000000000412217 in consumer_find_socket (key=<optimized out>,
consumer=<optimized out>) at consumer.c:359<span></span></font></p>
<p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">#6
0x0000000000000000 in ?? ()<span></span></font></p><p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><br></font></p><p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">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.</font></p><div><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">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.</font></div><div><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><br></font></div><div><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">Let me know if you can figure something out with this.</font></div><div><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><br></font></div><p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><b>2.8.1 SCENARIO 1</b> </font></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">GNU gdb (GDB) 7.8.1<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Copyright (C) 2014 Free Software Foundation, Inc.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">License GPLv3+: GNU GPL version 3 or later <<a href="http://gnu.org/licenses/gpl.html">http://gnu.org/licenses/gpl.html</a>><span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">This is free software: you are free to change and redistribute
it.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">There is NO WARRANTY, to the extent permitted by law. Type
"show copying"<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">and "show warranty" for details.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">This GDB was configured as "x86_64-poky-linux".<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Type "show configuration" for configuration details.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">For bug reporting instructions, please see:<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000"><<a href="http://www.gnu.org/software/gdb/bugs/">http://www.gnu.org/software/gdb/bugs/</a>>.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Find the GDB manual and other documentation resources online at:<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000"><<a href="http://www.gnu.org/software/gdb/documentation/">http://www.gnu.org/software/gdb/documentation/</a>>.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">For help, type "help".<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Type "apropos word" to search for commands related to
"word"...<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Reading symbols from /usr/bin/lttng-sessiond...(no debugging
symbols found)...done.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1134]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1090]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1091]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1092]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1093]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1095]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1098]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1102]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1110]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1096]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1094]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 1097]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000"> </font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">warning: Could not load shared library symbols for
linux-vdso.so.1.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Do you need "set solib-search-path" or "set
sysroot"?<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[Thread debugging using libthread_db enabled]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Using host libthread_db library
"/lib64/libthread_db.so.1".<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Core was generated by `/usr/bin/lttng-sessiond
--consumerd32-path /usr/lib/lttng/libexec/lttng-consume'.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Program terminated with signal SIGSEGV, Segmentation fault.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#0 0x0000000000000000 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">(gdb) bt<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Python Exception <type 'exceptions.ImportError'> No module
named gdb.frames: <span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#0 0x0000000000000000 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#1 0x00007f1b39b1db6b in lttng_cds_lfht_lookup () from
/usr/lib64/liblttng-ctl.so.0<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#2 0x0000000000412217 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#3 0x0000000000412263 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#4 0x0000000000427de8 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#5 0x0000000000427ed1 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#6 0x00000000004280d3 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#7 0x00007f1b398facad in ?? () from
/usr/lib64/liburcu.so.2<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#8 0x00007f1b3893d294 in start_thread (arg=0x7f1b1e7fc700)
at pthread_create.c:336<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#9 0x00007f1b3867b13d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">(gdb) q<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000"><br></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000"><br></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000"><br></font></span></p><p class="MsoNormal"><font face="times new roman, serif" color="#000000"><b style="background-color:rgb(255,255,255)">2.8.1 SCENARIO 2</b></font></p><div><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><br></font></div><p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">GNU gdb (GDB) 7.8.1<br></font></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Copyright (C) 2014 Free Software Foundation, Inc.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">License GPLv3+: GNU GPL version 3 or later <<a href="http://gnu.org/licenses/gpl.html">http://gnu.org/licenses/gpl.html</a>><span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">This is free software: you are free to change and redistribute
it.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">There is NO WARRANTY, to the extent permitted by law. Type
"show copying"<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">and "show warranty" for details.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">This GDB was configured as "x86_64-poky-linux".<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Type "show configuration" for configuration details.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">For bug reporting instructions, please see:<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000"><<a href="http://www.gnu.org/software/gdb/bugs/">http://www.gnu.org/software/gdb/bugs/</a>>.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Find the GDB manual and other documentation resources online at:<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000"><<a href="http://www.gnu.org/software/gdb/documentation/">http://www.gnu.org/software/gdb/documentation/</a>>.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">For help, type "help".<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Type "apropos word" to search for commands related to
"word"...<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Reading symbols from /usr/bin/lttng-sessiond...(no debugging
symbols found)...done.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 637]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 610]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 613]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 624]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 605]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 608]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 607]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 609]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 612]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 606]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 611]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[New LWP 616]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000"> </font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">warning: Could not load shared library symbols for
linux-vdso.so.1.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Do you need "set solib-search-path" or "set
sysroot"?<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">[Thread debugging using libthread_db enabled]<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Using host libthread_db library
"/lib64/libthread_db.so.1".<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Core was generated by `/usr/bin/lttng-sessiond
--consumerd32-path /usr/lib/lttng/libexec/lttng-consume'.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Program terminated with signal SIGSEGV, Segmentation fault.<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#0 0x0000000000000020 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">(gdb) bt<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">Python Exception <type 'exceptions.ImportError'> No module
named gdb.frames: <span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#0 0x0000000000000020 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#1 0x00007ff010197e02 in lttng_ht_lookup () from
/usr/lib64/liblttng-ctl.so.0<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#2 0x0000000000412217 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#3 0x0000000000412263 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#4 0x0000000000427de8 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#5 0x0000000000427ed1 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#6 0x00000000004280d3 in ?? ()<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#7 0x00007ff00ff76cad in ?? () from
/usr/lib64/liburcu.so.2<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#8 0x00007ff00efb9294 in start_thread (arg=0x7ff0096c5700)
at pthread_create.c:336<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">#9 0x00007ff00ecf713d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109<span></span></font></span></p><p class="MsoNormal"><span style="background-color:rgb(255,255,255)"><font face="times new roman, serif" color="#000000">(gdb) q<span></span></font></span></p><p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><br></font></p><p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000"><br></font></p><p class="MsoNormal"><font face="times new roman, serif" style="background-color:rgb(255,255,255)" color="#000000">Regards,<br>Aravind.</font></p></div></div>