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cdf64542 | 1 | /* Smoke test for mallinfo2 |
dff8da6b | 2 | Copyright (C) 2020-2024 Free Software Foundation, Inc. |
cdf64542 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 | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | /* Test that mallinfo2 is properly exported and basically works. */ | |
20 | ||
21 | #include <array_length.h> | |
22 | #include <malloc.h> | |
23 | #include <stdlib.h> | |
24 | #include <support/check.h> | |
25 | ||
26 | /* This is not specifically needed for the test, but (1) does | |
27 | something to the data so gcc doesn't optimize it away, and (2) may | |
28 | help when developing future tests. */ | |
29 | static void | |
30 | print_mi (const char *msg, struct mallinfo2 *m) | |
31 | { | |
32 | printf("\n%s...\n", msg); | |
d5c8f98c | 33 | #define P(f) printf("%s: %zu\n", #f, m->f) |
cdf64542 DD |
34 | P(arena); |
35 | P(ordblks); | |
36 | P(smblks); | |
37 | P(hblks); | |
38 | P(hblkhd); | |
39 | P(usmblks); | |
40 | P(fsmblks); | |
41 | P(uordblks); | |
42 | P(fordblks); | |
43 | P(keepcost); | |
44 | } | |
45 | ||
46 | /* We do this to force the call to malloc to not be optimized | |
47 | away. */ | |
48 | volatile void *ptr; | |
49 | ||
50 | static int | |
51 | do_test (void) | |
52 | { | |
53 | struct mallinfo2 mi1, mi2; | |
54 | int i; | |
55 | size_t total = 0; | |
56 | ||
57 | /* This is the key difference between mallinfo() and mallinfo2(). | |
58 | It may be a false positive if int and size_t are the same | |
59 | size. */ | |
60 | TEST_COMPARE (sizeof (mi1.arena), sizeof (size_t)); | |
61 | ||
62 | mi1 = mallinfo2 (); | |
63 | print_mi ("before", &mi1); | |
64 | ||
65 | /* Allocations that are meaningful-sized but not so large as to be | |
66 | mmapped, so that they're all accounted for in the field we test | |
67 | below. */ | |
68 | for (i = 1; i < 20; ++i) | |
69 | { | |
70 | ptr = malloc (160 * i); | |
bfbdfe4e | 71 | total += 160 * i; |
cdf64542 DD |
72 | } |
73 | ||
74 | mi2 = mallinfo2 (); | |
75 | print_mi ("after", &mi2); | |
76 | ||
77 | /* Check at least something changed. */ | |
bfbdfe4e | 78 | TEST_VERIFY (mi2.uordblks >= mi1.uordblks + total); |
cdf64542 DD |
79 | |
80 | return 0; | |
81 | } | |
82 | ||
83 | #include <support/test-driver.c> |