1 | /* Test that pthread_create diagnoses invalid scheduling parameters. |
2 | Copyright (C) 2014-2024 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 <assert.h> |
20 | #include <errno.h> |
21 | #include <pthread.h> |
22 | #include <stdio.h> |
23 | #include <stdlib.h> |
24 | #include <string.h> |
25 | |
26 | |
27 | static void * |
28 | thread_function (void *arg) |
29 | { |
30 | abort (); |
31 | } |
32 | |
33 | |
34 | static int |
35 | do_test (void) |
36 | { |
37 | #if !defined SCHED_FIFO || !defined SCHED_OTHER |
38 | puts ("SCHED_FIFO or SCHED_OTHER not available at compile time" ); |
39 | return 0; /* 77 */ |
40 | #else |
41 | |
42 | int err; |
43 | |
44 | #define TRY(func, arglist) \ |
45 | if ((err = func arglist) != 0) \ |
46 | { \ |
47 | printf ("%s: %s\n", #func, strerror (err)); \ |
48 | return 2; \ |
49 | } |
50 | |
51 | int fifo_max = sched_get_priority_max (SCHED_FIFO); |
52 | if (fifo_max == -1) |
53 | { |
54 | assert (errno == ENOTSUP || errno == ENOSYS); |
55 | puts (s: "SCHED_FIFO not supported, cannot test" ); |
56 | return 0; /* 77 */ |
57 | } |
58 | |
59 | int other_max = sched_get_priority_max (SCHED_OTHER); |
60 | if (other_max == -1) |
61 | { |
62 | assert (errno == ENOTSUP || errno == ENOSYS); |
63 | puts (s: "SCHED_OTHER not supported, cannot test" ); |
64 | return 0; /* 77 */ |
65 | } |
66 | |
67 | assert (fifo_max > other_max); |
68 | |
69 | pthread_attr_t attr; |
70 | TRY (pthread_attr_init, (&attr)); |
71 | TRY (pthread_attr_setinheritsched, (&attr, PTHREAD_EXPLICIT_SCHED)); |
72 | TRY (pthread_attr_setschedpolicy, (&attr, SCHED_FIFO)); |
73 | |
74 | /* This value is chosen so as to be valid for SCHED_FIFO but invalid for |
75 | SCHED_OTHER. */ |
76 | struct sched_param param = { .sched_priority = other_max + 1 }; |
77 | TRY (pthread_attr_setschedparam, (&attr, ¶m)); |
78 | |
79 | TRY (pthread_attr_setschedpolicy, (&attr, SCHED_OTHER)); |
80 | |
81 | /* Now ATTR has a sched_param that is invalid for its policy. */ |
82 | pthread_t th; |
83 | err = pthread_create (newthread: &th, attr: &attr, start_routine: &thread_function, NULL); |
84 | if (err != EINVAL) |
85 | { |
86 | printf (format: "pthread_create returned %d (%s), expected %d (EINVAL: %s)\n" , |
87 | err, strerror (errnum: err), EINVAL, strerror (EINVAL)); |
88 | return 1; |
89 | } |
90 | |
91 | return 0; |
92 | #endif |
93 | } |
94 | |
95 | |
96 | #define TEST_FUNCTION do_test () |
97 | #include "../test-skeleton.c" |
98 | |