Is there any way of setting the name of a thread in Linux?
My main purpose is it would be helpful while debugging, and also nice if that name was exposed through e.g. /proc/$PID/task/$TID/...
Is there any way of setting the name of a thread in Linux?
My main purpose is it would be helpful while debugging, and also nice if that name was exposed through e.g. /proc/$PID/task/$TID/...
Use the prctl(2) function with the option PR_SET_NAME (see the docs).
Note that old versions of the docs are a bit confusing. They say
Set the process name for the calling process
but since threads are light weight processes (LWP) on Linux, one thread is one process in this case.
You can see the thread name with ps -o cmd or with:
cat /proc/$PID/task/$TID/comm
or in between the () of cat /proc/$PID/task/$TID/stat:
4223 (kjournald) S 1 1 1 0...
or from GDB info threads between double quotes:
* 1 Thread 0x7ffff7fc7700 (LWP 6575) "kjournald" 0x00007ffff78bc30d in nanosleep () at ../sysdeps/unix/syscall-template.S:84