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cea81e2b7e
pthread_getattr_default_np needs to make a deep copy. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
/* Test for user-after-free bug in pthread_getattr_default_np (bug 25999).
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Copyright (C) 2020 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 <sched.h>
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#include <support/check.h>
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#include <support/xthread.h>
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static int
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do_test (void)
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{
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/* This is a typical affinity size. */
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enum { cpu_count = 128 };
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cpu_set_t *set = CPU_ALLOC (cpu_count);
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size_t set_size = CPU_ALLOC_SIZE (cpu_count);
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CPU_ZERO_S (set_size, set);
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CPU_SET (1, set);
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CPU_SET (3, set);
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/* Apply the affinity mask to the default attribute. */
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pthread_attr_t attr;
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xpthread_attr_init (&attr);
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TEST_COMPARE (pthread_attr_setaffinity_np (&attr, set_size, set), 0);
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TEST_COMPARE (pthread_setattr_default_np (&attr), 0);
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xpthread_attr_destroy (&attr);
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/* Read back the default attribute and check affinity mask. */
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pthread_getattr_default_np (&attr);
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CPU_ZERO_S (set_size, set);
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TEST_COMPARE (pthread_attr_getaffinity_np (&attr, set_size, set), 0);
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for (int i = 0; i < cpu_count; ++i)
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TEST_COMPARE (!!CPU_ISSET (i, set), i == 1 || i == 3);
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/* Apply a larger CPU affinity mask to the default attribute, to
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trigger reallocation. */
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{
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cpu_set_t *large_set = CPU_ALLOC (4 * cpu_count);
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size_t large_set_size = CPU_ALLOC_SIZE (4 * cpu_count);
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CPU_ZERO_S (large_set_size, large_set);
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pthread_attr_t large_attr;
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xpthread_attr_init (&large_attr);
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TEST_COMPARE (pthread_attr_setaffinity_np (&large_attr,
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large_set_size, large_set), 0);
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TEST_COMPARE (pthread_setattr_default_np (&large_attr), 0);
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xpthread_attr_destroy (&large_attr);
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CPU_FREE (large_set);
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}
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/* Read back the default attribute and check affinity mask. */
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CPU_ZERO_S (set_size, set);
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TEST_COMPARE (pthread_attr_getaffinity_np (&attr, set_size, set), 0);
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for (int i = 0; i < cpu_count; ++i)
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TEST_COMPARE (!!CPU_ISSET (i, set), i == 1 || i == 3);
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/* Due to bug 25999, the following caused a double-free abort. */
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xpthread_attr_destroy (&attr);
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CPU_FREE (set);
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return 0;
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}
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#include <support/test-driver.c>
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