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/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* Check alignment, overlapping and layout of TLS variables. */
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <pthreadP.h>
#include <sys/param.h>
#include "tst-tls5.h"
#ifdef TLS_REGISTER
struct tls_obj tls_registry[64];
static int
tls_addr_cmp (const void *a, const void *b)
{
if (((struct tls_obj *)a)->addr < ((struct tls_obj *)b)->addr)
return -1;
if (((struct tls_obj *)a)->addr > ((struct tls_obj *)b)->addr)
return 1;
return 0;
}
static int
do_test (void)
{
size_t cnt, i;
int res = 0;
uintptr_t min_addr = ~(uintptr_t) 0, max_addr = 0;
for (cnt = 0; tls_registry[cnt].name; ++cnt);
tls_registry[cnt].name = NULL;
tls_registry[cnt].addr = (uintptr_t) pthread_self ();
tls_registry[cnt].size = sizeof (struct pthread);
tls_registry[cnt++].align = __alignof__ (struct pthread);
qsort (tls_registry, cnt, sizeof (struct tls_obj), tls_addr_cmp);
for (i = 0; i < cnt; ++i)
{
printf ("%s%s = %p, size %zd, align %zd",
tls_registry[i].name ? "&" : "",
tls_registry[i].name ?: "pthread_self ()",
(void *) tls_registry[i].addr,
tls_registry[i].size, tls_registry[i].align);
if (tls_registry[i].addr & (tls_registry[i].align - 1))
{
fputs (", WRONG ALIGNMENT", stdout);
res = 1;
}
if (i > 0
&& (tls_registry[i - 1].addr + tls_registry[i - 1].size
> tls_registry[i].addr))
{
fputs (", ADDRESS OVERLAP", stdout);
res = 1;
}
puts ("");
if (tls_registry[i].name)
{
min_addr = MIN (tls_registry[i].addr, min_addr);
max_addr = MAX (tls_registry[i].addr + tls_registry[i].size,
max_addr);
}
}
if (cnt > 1)
{
#if TLS_TCB_AT_TP
if (tls_registry[cnt - 1].name)
{
puts ("pthread_self () not larger than all TLS addresses");
res = 1;
}
else
max_addr = MAX (tls_registry[cnt - 1].addr, max_addr);
#elif TLS_DTV_AT_TP
if (tls_registry[0].name)
{
puts ("pthread_self () not smaller than all TLS addresses");
res = 1;
}
#else
abort ();
#endif
printf ("Initial TLS used block size %zd\n",
(size_t) (max_addr - min_addr));
}
return res;
}
#define TEST_FUNCTION do_test ()
#else
#define TEST_FUNCTION 0
#endif
#include "../test-skeleton.c"
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