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/* Test that glibc.malloc.mxfast tunable works.
Copyright (C) 2019-2021 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/>. */
/* This test verifies that setting the glibc.malloc.mxfast tunable to
zero results in free'd blocks being returned to the small bins, not
the fast bins. */
#include <malloc.h>
#include <libc-diag.h>
#include <support/check.h>
int
do_test (void)
{
struct mallinfo m;
char *volatile p1;
char *volatile p2;
/* Arbitrary value; must be in default fastbin range. */
p1 = malloc (3);
/* Something large so that p1 isn't a "top block" */
p2 = malloc (512);
free (p1);
/* The test below covers the deprecated mallinfo function. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdeprecated-declarations");
m = mallinfo ();
DIAG_POP_NEEDS_COMMENT;
/* This will fail if there are any blocks in the fastbins. */
TEST_COMPARE (m.smblks, 0);
/* To keep gcc happy. */
free (p2);
return 0;
}
#include <support/test-driver.c>
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