1  /* Measure pthread_create thread creation with different stack
       2     and guard sizes.
       3  
       4     Copyright (C) 2017-2023 Free Software Foundation, Inc.
       5     This file is part of the GNU C Library.
       6  
       7     The GNU C Library is free software; you can redistribute it and/or
       8     modify it under the terms of the GNU Lesser General Public
       9     License as published by the Free Software Foundation; either
      10     version 2.1 of the License, or (at your option) any later version.
      11  
      12     The GNU C Library is distributed in the hope that it will be useful,
      13     but WITHOUT ANY WARRANTY; without even the implied warranty of
      14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15     Lesser General Public License for more details.
      16  
      17     You should have received a copy of the GNU Lesser General Public
      18     License along with the GNU C Library; if not, see
      19     <https://www.gnu.org/licenses/>.  */
      20  
      21  #include <stdio.h>
      22  #include <unistd.h>
      23  #include <support/xthread.h>
      24  
      25  static size_t pgsize;
      26  
      27  static void
      28  thread_create_init (void)
      29  {
      30    pgsize = sysconf (_SC_PAGESIZE);
      31  }
      32  
      33  static void *
      34  thread_dummy (void *arg)
      35  {
      36    return NULL;
      37  }
      38  
      39  static void
      40  thread_create (int nthreads, size_t stacksize, size_t guardsize)
      41  {
      42    pthread_attr_t attr;
      43    xpthread_attr_init (&attr);
      44  
      45    stacksize = stacksize * pgsize;
      46    guardsize = guardsize * pgsize;
      47  
      48    xpthread_attr_setstacksize (&attr, stacksize);
      49    xpthread_attr_setguardsize (&attr, guardsize);
      50  
      51    pthread_t ts[nthreads];
      52  
      53    for (int i = 0; i < nthreads; i++)
      54      ts[i] = xpthread_create (&attr, thread_dummy, NULL);
      55  
      56    for (int i = 0; i < nthreads; i++)
      57      xpthread_join (ts[i]);
      58  }