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58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Test that glibc.malloc.mxfast tunable works.
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Copyright (C) 2019-2025 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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/* This test verifies that setting the glibc.malloc.mxfast tunable to
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zero results in free'd blocks being returned to the small bins, not
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the fast bins. */
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#include <malloc.h>
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#include <libc-diag.h>
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#include <support/check.h>
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int
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do_test (void)
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{
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struct mallinfo m;
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char *volatile p1;
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char *volatile p2;
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/* Arbitrary value; must be in default fastbin range. */
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p1 = malloc (3);
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/* Something large so that p1 isn't a "top block" */
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p2 = malloc (512);
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free (p1);
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/* The test below covers the deprecated mallinfo function. */
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DIAG_PUSH_NEEDS_COMMENT;
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DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdeprecated-declarations");
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m = mallinfo ();
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DIAG_POP_NEEDS_COMMENT;
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/* This will fail if there are any blocks in the fastbins. */
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TEST_COMPARE (m.smblks, 0);
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/* To keep gcc happy. */
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free (p2);
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return 0;
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}
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#include <support/test-driver.c>
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