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c48d92b4 | 1 | /* Test that glibc.malloc.mxfast tunable works. |
dff8da6b | 2 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
c48d92b4 DD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
c48d92b4 DD |
18 | |
19 | /* This test verifies that setting the glibc.malloc.mxfast tunable to | |
20 | zero results in free'd blocks being returned to the small bins, not | |
21 | the fast bins. */ | |
22 | ||
23 | #include <malloc.h> | |
30e5069c | 24 | #include <libc-diag.h> |
f9769a23 | 25 | #include <support/check.h> |
c48d92b4 DD |
26 | |
27 | int | |
f9769a23 | 28 | do_test (void) |
c48d92b4 DD |
29 | { |
30 | struct mallinfo m; | |
f9769a23 FW |
31 | char *volatile p1; |
32 | char *volatile p2; | |
c48d92b4 DD |
33 | |
34 | /* Arbitrary value; must be in default fastbin range. */ | |
35 | p1 = malloc (3); | |
36 | /* Something large so that p1 isn't a "top block" */ | |
37 | p2 = malloc (512); | |
38 | free (p1); | |
39 | ||
30e5069c AZ |
40 | /* The test below covers the deprecated mallinfo function. */ |
41 | DIAG_PUSH_NEEDS_COMMENT; | |
42 | DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdeprecated-declarations"); | |
43 | ||
f9769a23 | 44 | m = mallinfo (); |
c48d92b4 | 45 | |
30e5069c AZ |
46 | DIAG_POP_NEEDS_COMMENT; |
47 | ||
c48d92b4 | 48 | /* This will fail if there are any blocks in the fastbins. */ |
f9769a23 | 49 | TEST_COMPARE (m.smblks, 0); |
c48d92b4 DD |
50 | |
51 | /* To keep gcc happy. */ | |
52 | free (p2); | |
53 | ||
54 | return 0; | |
55 | } | |
56 | ||
57 | #include <support/test-driver.c> |