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119 lines
2.8 KiB
C
119 lines
2.8 KiB
C
/* Copyright (C) 2003-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <support/support.h>
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#include <support/check.h>
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#include <support/xthread.h>
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struct test_s
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{
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__attribute__ ((aligned(0x20))) int a;
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__attribute__ ((aligned(0x200))) int b;
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};
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#define INIT_A 1
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#define INIT_B 42
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/* Deliberately not static. */
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__thread struct test_s s __attribute__ ((tls_model ("initial-exec"))) =
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{
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.a = INIT_A,
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.b = INIT_B
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};
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/* Use noinline in combination with not static to ensure that the
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alignment check is really done. Otherwise it was optimized out! */
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__attribute__ ((noinline)) void
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check_alignment (const char *thr_name, const char *ptr_name,
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int *ptr, int alignment)
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{
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uintptr_t offset_aligment = ((uintptr_t) ptr) & (alignment - 1);
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if (offset_aligment)
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{
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FAIL_EXIT1 ("%s (%p) is not 0x%x-byte aligned in %s thread\n",
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ptr_name, ptr, alignment, thr_name);
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}
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}
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static void
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check_s (const char *thr_name)
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{
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if (s.a != INIT_A || s.b != INIT_B)
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FAIL_EXIT1 ("initial value of s in %s thread wrong\n", thr_name);
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check_alignment (thr_name, "s.a", &s.a, 0x20);
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check_alignment (thr_name, "s.b", &s.b, 0x200);
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}
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static void *
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tf (void *arg)
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{
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check_s ("child");
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++s.a;
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return NULL;
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}
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int
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do_test (void)
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{
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check_s ("main");
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pthread_attr_t a;
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xpthread_attr_init (&a);
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#define STACK_SIZE (1 * 1024 * 1024)
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xpthread_attr_setstacksize (&a, STACK_SIZE);
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#define N 10
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int i;
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for (i = 0; i < N; ++i)
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{
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#define M 10
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pthread_t th[M];
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int j;
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for (j = 0; j < M; ++j, ++s.a)
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th[j] = xpthread_create (&a, tf, NULL);
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for (j = 0; j < M; ++j)
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xpthread_join (th[j]);
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}
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/* Also check the alignment of the tls variables if a misaligned stack is
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specified. */
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pthread_t th;
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void *thr_stack = NULL;
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thr_stack = xposix_memalign (0x200, STACK_SIZE + 1);
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xpthread_attr_setstack (&a, thr_stack + 1, STACK_SIZE);
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th = xpthread_create (&a, tf, NULL);
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xpthread_join (th);
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free (thr_stack);
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xpthread_attr_destroy (&a);
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return 0;
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}
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#include <support/test-driver.c>
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