ps display thread name

Question

Is there a way for ps (or similar tool) to display the pthread\'s name? I wrote the following simple program:

// th_name.c
#include 
         


        

Answer 1

With procps-ng (https://gitlab.com/procps-ng/procps) there are output option -L and -T which will print threads names:

$ ps -eL
$ ps -eT

-l long format may be used with them:

$ ps -eLl
$ ps -eTl

but -f option will replace thread name with full command line which is the same for all threads.

Answer 2

note the man page of pthread_setname_np(),which have showed how to get the threads' names:

pthread_setname_np() internally writes to the thread specific comm file under /proc filesystem: /proc/self/task/[tid]/comm. pthread_getname_np() retrieves it from the same location.

and

Example

The program below demonstrates the use of pthread_setname_np() and pthread_getname_np().

The following shell session shows a sample run of the program:

$ ./a.out

Created a thread. Default name is: a.out

The thread name after setting it is THREADFOO.

^Z #Suspend the program

1+ Stopped ./a.out

$ ps H -C a.out -o 'pid tid cmd comm'

PID TID CMD COMMAND

5990 5990 ./a.out a.out

5990 5991 ./a.out THREADFOO

$ cat /proc/5990/task/5990/comm

a.out

$ cat /proc/5990/task/5991/comm

THREADFOO

Answer 3

Show the thread IDs and names of the process with PID 12345:

ps H -o 'tid comm' 12345