linux-kernel - Re: [RFC] set the thread name

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Date:	Tue, 16 Jun 2009 21:14:26 +0200
From:	Bert Wesarg <bert.wesarg@...glemail.com>
To:	Stefani Seibold <stefani@...bold.net>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC] set the thread name

Hi,

On Tue, Jun 16, 2009 at 20:39, Stefani Seibold<stefani@...bold.net> wrote:
> Currently it is not easy to identify a thread in linux, because there is
> no thread name like in some other OS.
>
> If there were are thread name then we could extend a kernel segv message
> and the /proc/<pid>/task/<tid>/... entries by a TName value like this:
prctl(PR_SET_NAME, ...) works perfectly here.

Bert

/* -*- c -*- */

#define _GNU_SOURCE
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <math.h>
#include <pthread.h>
#include <sys/prctl.h>

void *
thread(void *arg)
{
    unsigned long i = (unsigned long)arg;
    char comm[16];
    snprintf(comm, sizeof comm, "task %02lu", i);
    prctl(PR_SET_NAME, comm, 0l, 0l, 0l);

    sleep(10);

    return NULL;
}

int
main(int ac, char *av[])
{
    pthread_t thr;
    unsigned long i, n = 10;
    char comm[16];

    printf("%u\n", getpid());
    sleep(5);
    snprintf(comm, sizeof comm, "master");
    prctl(PR_SET_NAME, comm, 0l, 0l, 0l);
    sleep(5);

    for (i = 0; i < n; i++)
        pthread_create(&thr, NULL, thread, (void *)i);

    pthread_join(thr, NULL);

    return 0;
}

>
> Greetings,
> Stefani
>
>
> --
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