Hello Pierre/Mathieu,
I have followed the instructions for UST(user space tracing) from
http://lttng.org/files/ust/manual/ust.html
1. Installed liburcu & ust
liburcu-0.46
ust-0.5
2. Compiled the usttest.c
r...@x86:~/ust-test# gcc -o usttest -lust usttest.c
r...@x86-generic:~/ust-test# ldd ./usttest
linux-gate.so.1 => (0xb789f000)
* libust.so.0 => /usr/lib/libust.so.0 (0xb787a000)*
libc.so.6 => /lib/libc.so.6 (0xb772d000)
/lib/ld-linux.so.2 (0xb78a0000)
* liburcu-bp.so.0 => /usr/lib/liburcu-bp.so.0 (0xb772a000)*
librt.so.1 => /lib/librt.so.1 (0xb7715000)
libpthread.so.0 => /lib/libpthread.so.0 (0xb76fb000)
r...@x86-generic:~/ust-test#
Package Versions:
###################
*GLIBC: 2.11.1
GCC: 4.4*
*libglib-2.0-0 *
###################
3. Now start tracing :
r...@x86-generic:~/ust-test# usttrace ./usttest
*Waiting for ustd to shutdown...*
Trace was output in:
/home/root/.usttraces/x86-generic-20100730144935535976601
r...@x86-generic:~/ust-test#
Seems some issue in executing of ustctl..
Now checking the presence of trace file:
r...@x86-generic:~/.usttraces/x86-generic-20100730144935535976601# du -sh *
20K 2851_5499711528108666788
0 app.log
0 ustd.log
r...@x86-generic:~/.usttraces/x86-generic-20100730144935535976601#
4. Dumping the result on console :
*r...@x86-generic:~# lttv -m textDump -t
/home/root/.usttraces/x86-generic-20100730144935535976601*
** (process:2862): WARNING **: Unsupported trace version : 2.6
** (process:2862): WARNING **: parse_trace_header error
** (process:2862): WARNING **: Unsupported trace version : 2.6
** (process:2862): WARNING **: parse_trace_header error
** (process:2862): WARNING **: Unsupported trace version : 2.6
** (process:2862): WARNING **: parse_trace_header error
** (process:2862): WARNING **: Unsupported trace version : 2.6
** (process:2862): WARNING **: parse_trace_header error
** (process:2862): WARNING **: Trace
/home/root/.usttraces/x86-20100730144935535976601 has no metadata tracefile
** (process:2862): CRITICAL **: cannot open trace
/home/root/.usttraces/x86-20100730144935535976601
*Segmentation fault*
r...@x86-generic:~#
*DMESG OUTPUT:*
r...@x86-generic:~# dmesg | grep -ir ltt
*[ 5108.713591] lttv.real[2862]: segfault at 40 ip b7732222 sp bfd88e90
error 4 in libglib-2.0.so.0.2200.1[b7714000+b6000]*
r...@x86-generic:~#
What is mismatching section/package that is causing this segfault ?
Your inputs are appreciated !! Thanks !!
Regards,
Srikanth Krishnakar
**********************
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