linuxthreads/tst-tls1.c

   1 /* Copyright (C) 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 /* Check alignment, overlapping and layout of TLS variables.  */
  21 #include <stdint.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <pthread.h>
  25 #include <sys/param.h>
  26
  27 #include "tst-tls1.h"
  28
  29 #ifdef TLS_REGISTER
  30
  31 struct tls_obj tls_registry[64];
  32
  33 static int
  34 tls_addr_cmp (const void *a, const void *b)
  35 {
  36   if (((struct tls_obj *)a)->addr < ((struct tls_obj *)b)->addr)
  37     return -1;
  38   if (((struct tls_obj *)a)->addr > ((struct tls_obj *)b)->addr)
  39     return 1;
  40   return 0;
  41 }
  42
  43 static int
  44 do_test (void)
  45 {
  46   size_t cnt, i;
  47   int res = 0;
  48   uintptr_t min_addr = ~(uintptr_t) 0, max_addr = 0;
  49
  50   for (cnt = 0; tls_registry[cnt].name; ++cnt);
  51
  52   qsort (tls_registry, cnt, sizeof (struct tls_obj), tls_addr_cmp);
  53
  54   for (i = 0; i < cnt; ++i)
  55     {
  56       printf ("%s = %p, size %zd, align %zd",
  57               tls_registry[i].name, (void *) tls_registry[i].addr,
  58               tls_registry[i].size, tls_registry[i].align);
  59       if (tls_registry[i].addr & (tls_registry[i].align - 1))
  60         {
  61           fputs (", WRONG ALIGNMENT", stdout);
  62           res = 1;
  63         }
  64       if (i > 0
  65           && (tls_registry[i - 1].addr + tls_registry[i - 1].size
  66               > tls_registry[i].addr))
  67         {
  68           fputs (", ADDRESS OVERLAP", stdout);
  69           res = 1;
  70         }
  71       puts ("");
  72       min_addr = MIN (tls_registry[i].addr, min_addr);
  73       max_addr = MAX (tls_registry[i].addr + tls_registry[i].size,
  74                       max_addr);
  75     }
  76
  77   if (cnt > 1)
  78     printf ("Initial TLS used block size %zd\n",
  79             (size_t) (max_addr - min_addr));
  80   return res;
  81 }
  82
  83 #define TEST_FUNCTION do_test ()
  84
  85 #else
  86
  87 #define TEST_FUNCTION 0
  88
  89 #endif
  90
  91 #include "../test-skeleton.c"