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/* Test for user-after-free bug in pthread_getattr_default_np (bug 25999).
Copyright (C) 2020-2021 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 <sched.h>
#include <support/check.h>
#include <support/xthread.h>
static int
do_test (void)
{
/* This is a typical affinity size. */
enum { cpu_count = 128 };
cpu_set_t *set = CPU_ALLOC (cpu_count);
size_t set_size = CPU_ALLOC_SIZE (cpu_count);
CPU_ZERO_S (set_size, set);
CPU_SET (1, set);
CPU_SET (3, set);
/* Apply the affinity mask to the default attribute. */
pthread_attr_t attr;
xpthread_attr_init (&attr);
TEST_COMPARE (pthread_attr_setaffinity_np (&attr, set_size, set), 0);
TEST_COMPARE (pthread_setattr_default_np (&attr), 0);
xpthread_attr_destroy (&attr);
/* Read back the default attribute and check affinity mask. */
pthread_getattr_default_np (&attr);
CPU_ZERO_S (set_size, set);
TEST_COMPARE (pthread_attr_getaffinity_np (&attr, set_size, set), 0);
for (int i = 0; i < cpu_count; ++i)
TEST_COMPARE (!!CPU_ISSET (i, set), i == 1 || i == 3);
/* Apply a larger CPU affinity mask to the default attribute, to
trigger reallocation. */
{
cpu_set_t *large_set = CPU_ALLOC (4 * cpu_count);
size_t large_set_size = CPU_ALLOC_SIZE (4 * cpu_count);
CPU_ZERO_S (large_set_size, large_set);
pthread_attr_t large_attr;
xpthread_attr_init (&large_attr);
TEST_COMPARE (pthread_attr_setaffinity_np (&large_attr,
large_set_size, large_set), 0);
TEST_COMPARE (pthread_setattr_default_np (&large_attr), 0);
xpthread_attr_destroy (&large_attr);
CPU_FREE (large_set);
}
/* Read back the default attribute and check affinity mask. */
CPU_ZERO_S (set_size, set);
TEST_COMPARE (pthread_attr_getaffinity_np (&attr, set_size, set), 0);
for (int i = 0; i < cpu_count; ++i)
TEST_COMPARE (!!CPU_ISSET (i, set), i == 1 || i == 3);
/* Due to bug 25999, the following caused a double-free abort. */
xpthread_attr_destroy (&attr);
CPU_FREE (set);
return 0;
}
#include <support/test-driver.c>
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