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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/>. */
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
#include <support/support.h>
#include <support/check.h>
#include <support/xthread.h>
struct test_s
{
__attribute__ ((aligned(0x20))) int a;
__attribute__ ((aligned(0x200))) int b;
};
#define INIT_A 1
#define INIT_B 42
/* Deliberately not static. */
__thread struct test_s s __attribute__ ((tls_model ("initial-exec"))) =
{
.a = INIT_A,
.b = INIT_B
};
/* Use noinline in combination with not static to ensure that the
alignment check is really done. Otherwise it was optimized out! */
__attribute__ ((noinline)) void
check_alignment (const char *thr_name, const char *ptr_name,
int *ptr, int alignment)
{
uintptr_t offset_aligment = ((uintptr_t) ptr) & (alignment - 1);
if (offset_aligment)
{
FAIL_EXIT1 ("%s (%p) is not 0x%x-byte aligned in %s thread\n",
ptr_name, ptr, alignment, thr_name);
}
}
static void
check_s (const char *thr_name)
{
if (s.a != INIT_A || s.b != INIT_B)
FAIL_EXIT1 ("initial value of s in %s thread wrong\n", thr_name);
check_alignment (thr_name, "s.a", &s.a, 0x20);
check_alignment (thr_name, "s.b", &s.b, 0x200);
}
static void *
tf (void *arg)
{
check_s ("child");
++s.a;
return NULL;
}
int
do_test (void)
{
check_s ("main");
pthread_attr_t a;
xpthread_attr_init (&a);
#define STACK_SIZE (1 * 1024 * 1024)
xpthread_attr_setstacksize (&a, STACK_SIZE);
#define N 10
int i;
for (i = 0; i < N; ++i)
{
#define M 10
pthread_t th[M];
int j;
for (j = 0; j < M; ++j, ++s.a)
th[j] = xpthread_create (&a, tf, NULL);
for (j = 0; j < M; ++j)
xpthread_join (th[j]);
}
/* Also check the alignment of the tls variables if a misaligned stack is
specified. */
pthread_t th;
void *thr_stack = NULL;
thr_stack = xposix_memalign (0x200, STACK_SIZE + 1);
xpthread_attr_setstack (&a, thr_stack + 1, STACK_SIZE);
th = xpthread_create (&a, tf, NULL);
xpthread_join (th);
free (thr_stack);
xpthread_attr_destroy (&a);
return 0;
}
#include <support/test-driver.c>
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