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102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/* Smoke test for malloc_info.
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Copyright (C) 2017 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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<http://www.gnu.org/licenses/>. */
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/* The purpose of this test is to provide a quick way to run
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malloc_info in a multi-threaded process. */
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#include <array_length.h>
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#include <malloc.h>
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#include <stdlib.h>
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#include <support/support.h>
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#include <support/xthread.h>
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/* This barrier is used to have the main thread wait until the helper
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threads have performed their allocations. */
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static pthread_barrier_t barrier;
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enum
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{
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/* Number of threads performing allocations. */
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thread_count = 4,
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/* Amount of memory allocation per thread. This should be large
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enough to cause the allocation of multiple heaps per arena. */
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per_thread_allocations
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= sizeof (void *) == 4 ? 16 * 1024 * 1024 : 128 * 1024 * 1024,
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};
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static void *
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allocation_thread_function (void *closure)
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{
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struct list
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{
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struct list *next;
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long dummy[4];
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};
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struct list *head = NULL;
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size_t allocated = 0;
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while (allocated < per_thread_allocations)
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{
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struct list *new_head = xmalloc (sizeof (*new_head));
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allocated += sizeof (*new_head);
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new_head->next = head;
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head = new_head;
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}
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xpthread_barrier_wait (&barrier);
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/* Main thread prints first statistics here. */
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xpthread_barrier_wait (&barrier);
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while (head != NULL)
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{
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struct list *next_head = head->next;
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free (head);
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head = next_head;
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}
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return NULL;
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}
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static int
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do_test (void)
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{
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xpthread_barrier_init (&barrier, NULL, thread_count + 1);
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pthread_t threads[thread_count];
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for (size_t i = 0; i < array_length (threads); ++i)
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threads[i] = xpthread_create (NULL, allocation_thread_function, NULL);
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xpthread_barrier_wait (&barrier);
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puts ("info: After allocation:");
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malloc_info (0, stdout);
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xpthread_barrier_wait (&barrier);
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for (size_t i = 0; i < array_length (threads); ++i)
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xpthread_join (threads[i]);
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puts ("\ninfo: After deallocation:");
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malloc_info (0, stdout);
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return 0;
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}
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#include <support/test-driver.c>
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