(cc to linux-api)
> Hi,
>
> On Tue, Jun 16, 2009 at 20:39, Stefani Seibold<stefani@xxxxxxxxxxx> 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.
Oops, but man page describe another thing.
PR_SET_NAME
(Since Linux 2.6.9) Set the process name for the calling process
to arg2. ^^^^^^^^^^^^
Should we change man page? or change implementation?
I bet many developer assume the implementation is right.
>
> 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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