nptl/tst-tls5.c

   1 /* Copyright (C) 2003-2018 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /* Check alignment, overlapping and layout of TLS variables.  */
  20 #include <stdint.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <pthread.h>
  24 #include <pthreadP.h>
  25 #include <sys/param.h>
  26
  27 #include "tst-tls5.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   tls_registry[cnt].name = NULL;
  52   tls_registry[cnt].addr = (uintptr_t) pthread_self ();
  53   tls_registry[cnt].size = sizeof (struct pthread);
  54   tls_registry[cnt++].align = __alignof__ (struct pthread);
  55
  56   qsort (tls_registry, cnt, sizeof (struct tls_obj), tls_addr_cmp);
  57
  58   for (i = 0; i < cnt; ++i)
  59     {
  60       printf ("%s%s = %p, size %zd, align %zd",
  61               tls_registry[i].name ? "&" : "",
  62               tls_registry[i].name ?: "pthread_self ()",
  63               (void *) tls_registry[i].addr,
  64               tls_registry[i].size, tls_registry[i].align);
  65       if (tls_registry[i].addr & (tls_registry[i].align - 1))
  66         {
  67           fputs (", WRONG ALIGNMENT", stdout);
  68           res = 1;
  69         }
  70       if (i > 0
  71           && (tls_registry[i - 1].addr + tls_registry[i - 1].size
  72               > tls_registry[i].addr))
  73         {
  74           fputs (", ADDRESS OVERLAP", stdout);
  75           res = 1;
  76         }
  77       puts ("");
  78       if (tls_registry[i].name)
  79         {
  80           min_addr = MIN (tls_registry[i].addr, min_addr);
  81           max_addr = MAX (tls_registry[i].addr + tls_registry[i].size,
  82                           max_addr);
  83         }
  84     }
  85
  86   if (cnt > 1)
  87     {
  88 #if TLS_TCB_AT_TP
  89       if (tls_registry[cnt - 1].name)
  90         {
  91           puts ("pthread_self () not larger than all TLS addresses");
  92           res = 1;
  93         }
  94       else
  95         max_addr = MAX (tls_registry[cnt - 1].addr, max_addr);
  96 #elif TLS_DTV_AT_TP
  97       if (tls_registry[0].name)
  98         {
  99           puts ("pthread_self () not smaller than all TLS addresses");
 100           res = 1;
 101         }
 102 #else
 103       abort ();
 104 #endif
 105       printf ("Initial TLS used block size %zd\n",
 106               (size_t) (max_addr - min_addr));
 107     }
 108   return res;
 109 }
 110
 111 #define TEST_FUNCTION do_test ()
 112
 113 #else
 114
 115 #define TEST_FUNCTION 0
 116
 117 #endif
 118
 119 #include "../test-skeleton.c"