[Bug time/19821] Timer crash when repeat create-start-delete several times

["fweimer at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19821

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
                 CC|                            |fweimer at redhat dot com

--- Comment #9 from Florian Weimer <fweimer at redhat dot com> ---
The C version goes like this.

#include <pthread.h>
#include <sys/signal.h>
#include <stdio.h>
#include <assert.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>

#include <sys/resource.h>

void timer_thread (union sigval signal_value) {
  printf ("Timer callback!\n");
}

int main(int argc, char* argv[]) {

#define TIMER_COUNT 300

  for (int i = 0; i < 10000; i++) {
    printf("\n~~~~~~~ Iteration #%06d ~~~~~~~~~~~~~\n", i+1);

    int status = 0;

    timer_t timer_id[TIMER_COUNT] = {};
    memset(&timer_id[0], 0, sizeof(timer_t)*TIMER_COUNT);

    printf ("Start creating timers! \n");

    for (int j = 0; j < TIMER_COUNT; j++) {

      printf("      ___Subiteration #%02d___\n", j+1);

      struct itimerspec ts = {};
      struct sigevent se = {};

      memset(&ts, 0, sizeof(struct itimerspec));
      memset(&se, 0, sizeof(struct sigevent));

      se.sigev_notify = SIGEV_THREAD;
      se.sigev_value.sival_int = j;
      se.sigev_notify_function = timer_thread;

      // Specify a repeating timer that fires each 100000 nanosec.
      memset(&ts, 0, sizeof(ts));
      ts.it_value.tv_nsec = 100000;
      ts.it_interval.tv_nsec = 100000;

      //printf ("Creating timer\n");
      status = timer_create(CLOCK_REALTIME, &se, &timer_id[j]);
      assert(!status && "Create timer");

      //printf ("Setting timer %#08x...\n", *(unsigned int*)&timer_id[j]);
      status = timer_settime(timer_id[j], 0, &ts, 0);
      assert(!status && "Set timer");
    }

    printf ("All timers has already started! \n");

    printf ("Start timers deleted! \n");
    for (int j = 0; j < TIMER_COUNT; j++) {
      usleep(100);
      //stop and delete
      printf ("Delete timer %#08x...\n", *(int*)&timer_id[j]);

      status = timer_delete(timer_id[j]);
      assert(!status && "Fail delete timer");
    }
    printf ("All timers deleted! \n");
  }
  printf("Success!\n");
  return 0;
}

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