nptl/tst-tls5.c

   1 /* Copyright (C) 2003-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 /* Check alignment, overlapping and layout of TLS variables.  */
  19 #include <stdint.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <pthread.h>
  23 #include <pthreadP.h>
  24 #include <sys/param.h>
  25
  26 #include "tst-tls5.h"
  27
  28 #ifdef TLS_REGISTER
  29
  30 struct tls_obj tls_registry[64];
  31
  32 static int
  33 tls_addr_cmp (const void *a, const void *b)
  34 {
  35   if (((struct tls_obj *)a)->addr < ((struct tls_obj *)b)->addr)
  36     return -1;
  37   if (((struct tls_obj *)a)->addr > ((struct tls_obj *)b)->addr)
  38     return 1;
  39   return 0;
  40 }
  41
  42 static int
  43 do_test (void)
  44 {
  45   size_t cnt, i;
  46   int res = 0;
  47   uintptr_t min_addr = ~(uintptr_t) 0, max_addr = 0;
  48
  49   for (cnt = 0; tls_registry[cnt].name; ++cnt);
  50   tls_registry[cnt].name = NULL;
  51   tls_registry[cnt].addr = (uintptr_t) pthread_self ();
  52   tls_registry[cnt].size = sizeof (struct pthread);
  53   tls_registry[cnt++].align = __alignof__ (struct pthread);
  54
  55   qsort (tls_registry, cnt, sizeof (struct tls_obj), tls_addr_cmp);
  56
  57   for (i = 0; i < cnt; ++i)
  58     {
  59       printf ("%s%s = %p, size %zd, align %zd",
  60               tls_registry[i].name ? "&" : "",
  61               tls_registry[i].name ?: "pthread_self ()",
  62               (void *) tls_registry[i].addr,
  63               tls_registry[i].size, tls_registry[i].align);
  64       if (tls_registry[i].addr & (tls_registry[i].align - 1))
  65         {
  66           fputs (", WRONG ALIGNMENT", stdout);
  67           res = 1;
  68         }
  69       if (i > 0
  70           && (tls_registry[i - 1].addr + tls_registry[i - 1].size
  71               > tls_registry[i].addr))
  72         {
  73           fputs (", ADDRESS OVERLAP", stdout);
  74           res = 1;
  75         }
  76       puts ("");
  77       if (tls_registry[i].name)
  78         {
  79           min_addr = MIN (tls_registry[i].addr, min_addr);
  80           max_addr = MAX (tls_registry[i].addr + tls_registry[i].size,
  81                           max_addr);
  82         }
  83     }
  84
  85   if (cnt > 1)
  86     {
  87 #if TLS_TCB_AT_TP
  88       if (tls_registry[cnt - 1].name)
  89         {
  90           puts ("pthread_self () not larger than all TLS addresses");
  91           res = 1;
  92         }
  93       else
  94         max_addr = MAX (tls_registry[cnt - 1].addr, max_addr);
  95 #elif TLS_DTV_AT_TP
  96       if (tls_registry[0].name)
  97         {
  98           puts ("pthread_self () not smaller than all TLS addresses");
  99           res = 1;
 100         }
 101 #else
 102       abort ();
 103 #endif
 104       printf ("Initial TLS used block size %zd\n",
 105               (size_t) (max_addr - min_addr));
 106     }
 107   return res;
 108 }
 109
 110 #define TEST_FUNCTION do_test ()
 111
 112 #else
 113
 114 #define TEST_FUNCTION 0
 115
 116 #endif
 117
 118 #include "../test-skeleton.c"