1 | /* Test for user-after-free bug in pthread_getattr_default_np (bug 25999). |
2 | Copyright (C) 2020-2022 Free Software Foundation, Inc. |
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 | #include <pthread.h> |
20 | #include <sched.h> |
21 | #include <support/check.h> |
22 | #include <support/xthread.h> |
23 | |
24 | static int |
25 | do_test (void) |
26 | { |
27 | /* This is a typical affinity size. */ |
28 | enum { cpu_count = 128 }; |
29 | cpu_set_t *set = CPU_ALLOC (cpu_count); |
30 | size_t set_size = CPU_ALLOC_SIZE (cpu_count); |
31 | CPU_ZERO_S (set_size, set); |
32 | CPU_SET (1, set); |
33 | CPU_SET (3, set); |
34 | |
35 | /* Apply the affinity mask to the default attribute. */ |
36 | pthread_attr_t attr; |
37 | xpthread_attr_init (attr: &attr); |
38 | TEST_COMPARE (pthread_attr_setaffinity_np (&attr, set_size, set), 0); |
39 | TEST_COMPARE (pthread_setattr_default_np (&attr), 0); |
40 | xpthread_attr_destroy (attr: &attr); |
41 | |
42 | /* Read back the default attribute and check affinity mask. */ |
43 | pthread_getattr_default_np (attr: &attr); |
44 | CPU_ZERO_S (set_size, set); |
45 | TEST_COMPARE (pthread_attr_getaffinity_np (&attr, set_size, set), 0); |
46 | for (int i = 0; i < cpu_count; ++i) |
47 | TEST_COMPARE (!!CPU_ISSET (i, set), i == 1 || i == 3); |
48 | |
49 | |
50 | /* Apply a larger CPU affinity mask to the default attribute, to |
51 | trigger reallocation. */ |
52 | { |
53 | cpu_set_t *large_set = CPU_ALLOC (4 * cpu_count); |
54 | size_t large_set_size = CPU_ALLOC_SIZE (4 * cpu_count); |
55 | CPU_ZERO_S (large_set_size, large_set); |
56 | pthread_attr_t large_attr; |
57 | xpthread_attr_init (attr: &large_attr); |
58 | TEST_COMPARE (pthread_attr_setaffinity_np (&large_attr, |
59 | large_set_size, large_set), 0); |
60 | TEST_COMPARE (pthread_setattr_default_np (&large_attr), 0); |
61 | xpthread_attr_destroy (attr: &large_attr); |
62 | CPU_FREE (large_set); |
63 | } |
64 | |
65 | /* Read back the default attribute and check affinity mask. */ |
66 | CPU_ZERO_S (set_size, set); |
67 | TEST_COMPARE (pthread_attr_getaffinity_np (&attr, set_size, set), 0); |
68 | for (int i = 0; i < cpu_count; ++i) |
69 | TEST_COMPARE (!!CPU_ISSET (i, set), i == 1 || i == 3); |
70 | /* Due to bug 25999, the following caused a double-free abort. */ |
71 | xpthread_attr_destroy (attr: &attr); |
72 | |
73 | CPU_FREE (set); |
74 | |
75 | return 0; |
76 | } |
77 | |
78 | #include <support/test-driver.c> |
79 | |