[lttng-dev] lttng-trace: a new strace-alike LTTng command
mathieu.desnoyers at efficios.com
Thu Feb 18 17:14:24 EST 2021
I just pushed a new command line tool named `lttng-trace`, which allows tracing a
specific command and its sub-processes using the LTTng system call tracer. It focuses
on simplicity. It can be found here:
Git website: http://git.lttng.org/?p=lttng-trace.git
git clone https://git.lttng.org/lttng-trace.git
For instance, tracing the command "date" is as simple as:
The tracing session can be optionally configured by using the usual lttng control
interfaces after this message appears:
[lttng-trace] Tracing session `date-20210218-170545` created. It can be customized using the `lttng` command.
[lttng-trace] Press <ENTER> key when ready to run the child process.
After execution of the command, the following message details how to view the trace:
[lttng-trace] Sub-process hierarchy traced successfully. View trace with `babeltrace2 /tmp/lttng-trace/date-20210218-170906`
See `lttng-trace --help` for more options.
This new command is in early alpha stage. Feedback is welcome! For instance, we are wondering whether
the default behavior should just be tracing system calls, or if some level of user-space tracing should
be enabled by default as well. Or if some new options should enable "typical" usage scenarios.
More information about the lttng-dev