[ltt-dev] UST - Problems in recording trace on a current process

[tracemein@gmail.com (Naren)]

Hi Pierre

I did a strace on ustctl as suggested by you. Found this problem with
connect call in strace.

*socket(PF_FILE, SOCK_STREAM, 0)         = 3*
*connect(3, {sa_family=AF_FILE, path="/tmp/ust-app-socks/11191"}, 110) = -1
ENOENT (No such file or directory)*
*gettid()                                = 23476*

I did a manual check on ust-app-socks, found only "ustd" running inside
that.

Regards,
Naren

On Tue, Feb 9, 2010 at 5:42 PM, Pierre-Marc Fournier <
pierre-marc.fournier at polymtl.ca> wrote:

> On February 8, 2010 20:48:16 soumyakanti chakraborty wrote:
> > Hi Pierre
> >
> > I am still getting the same errors during the tracing of a particular
> > process with specific pid's -
> >
> > *ustctl[1605/1605]: Error: connect: No such file or directory (in
> > ustcomm_connect_path() at ../libustcomm/ustcomm.c:452)*
> > *ustcmd_send_cmd: could not connect to PID 1283*
> > *error while trying to list markers for PID 1283*
> >
>
> Further thoughts on this. You could see this message also if libust is not
> linked to the program you are trying to trace.
>
> Another case is if your program is registering a handler for SIGUSR1.
>
> If not, send us the strace output around the connect() call.
>
> pmf
>
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