[Bug libc/16299] pthread_attr_setstacksize ignored

["knielson at adaptivecomputing dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16299

--- Comment #2 from Ken Nielson <knielson at adaptivecomputing dot com> ---
Following is a sample of the code we are using. I have removed some of the
ancillary code to help make it easier to see how we are using the pthread
library.



#define MINIMUM_STACK_SIZE 16777216
#define MAX_STACK_SIZE MINIMUM_STACK_SIZE * 2
/*extern int    LOGLEVEL;*/
sigset_t      fillset;

threadpool_t *request_pool;

static void *work_thread(void *);

int create_work_thread(void)

  {
  int             rc;
  sigset_t        oldset;
  pthread_t       wthread;
  pthread_attr_t  attr;
  size_t          stack_size;
  char            log_buf[LOG_BUF_SIZE];

  if ((rc = pthread_attr_init(&attr)) != 0)
    {
    sprintf(log_buf, "pthread_attr_init failed. errno %d. Could not start
worker thread", errno);
    perror(log_buf);
    log_err(-1, __func__, log_buf);
    return(PBSE_SYSTEM);
    }

  pthread_attr_getstacksize(&attr, &stack_size);
  if (stack_size < MINIMUM_STACK_SIZE)
    stack_size = MINIMUM_STACK_SIZE;
  if (stack_size > MAX_STACK_SIZE)
    stack_size = MAX_STACK_SIZE;

  pthread_attr_setstacksize(&attr, stack_size);

  /* save old signal mask */
  pthread_sigmask(SIG_SETMASK,&fillset,&oldset);
  rc = pthread_create(&wthread,&request_pool->tp_attr,work_thread, &attr);
  pthread_sigmask(SIG_SETMASK,&oldset,NULL);

  return(rc);
  } /* END create_work_thread() */

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