mirror of git://sourceware.org/git/glibc.git
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* Smoke test for mallinfo2
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Copyright (C) 2020-2025 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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/* Test that mallinfo2 is properly exported and basically works. */
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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/check.h>
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#include "tst-malloc-aux.h"
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/* This is not specifically needed for the test, but (1) does
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something to the data so gcc doesn't optimize it away, and (2) may
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help when developing future tests. */
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static void
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print_mi (const char *msg, struct mallinfo2 *m)
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{
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printf("\n%s...\n", msg);
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#define P(f) printf("%s: %zu\n", #f, m->f)
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P(arena);
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P(ordblks);
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P(smblks);
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P(hblks);
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P(hblkhd);
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P(usmblks);
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P(fsmblks);
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P(uordblks);
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P(fordblks);
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P(keepcost);
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}
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/* We do this to force the call to malloc to not be optimized
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away. */
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volatile void *ptr;
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static int
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do_test (void)
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{
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struct mallinfo2 mi1, mi2;
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int i;
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size_t total = 0;
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/* This is the key difference between mallinfo() and mallinfo2().
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It may be a false positive if int and size_t are the same
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size. */
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TEST_COMPARE (sizeof (mi1.arena), sizeof (size_t));
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mi1 = mallinfo2 ();
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print_mi ("before", &mi1);
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/* Allocations that are meaningful-sized but not so large as to be
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mmapped, so that they're all accounted for in the field we test
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below. */
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for (i = 1; i < 20; ++i)
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{
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ptr = malloc (160 * i);
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total += 160 * i;
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}
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mi2 = mallinfo2 ();
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print_mi ("after", &mi2);
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/* Check at least something changed. */
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TEST_VERIFY (mi2.uordblks >= mi1.uordblks + total);
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return 0;
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}
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#include <support/test-driver.c>
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