]>
Commit | Line | Data |
---|---|---|
688903eb | 1 | /* Copyright (C) 2014-2018 Free Software Foundation, Inc. |
0bd95672 MF |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, see | |
16 | <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <errno.h> | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <unistd.h> | |
23 | #include <limits.h> | |
24 | #include <pthread.h> | |
25 | #include <sys/prctl.h> | |
26 | ||
27 | #if __mips_fpr != 0 || _MIPS_SPFPSET != 16 | |
28 | # error This test requires -mfpxx -mno-odd-spreg | |
29 | #endif | |
30 | ||
31 | /* This test verifies that all threads in a process see a mode | |
32 | change when any thread causes a mode change. */ | |
33 | ||
34 | static int mode[6] = | |
35 | { | |
36 | 0, | |
37 | PR_FP_MODE_FR, | |
38 | PR_FP_MODE_FR | PR_FP_MODE_FRE, | |
39 | PR_FP_MODE_FR, | |
40 | 0, | |
41 | PR_FP_MODE_FR | PR_FP_MODE_FRE | |
42 | }; | |
43 | static volatile int current_mode; | |
44 | static volatile int finished; | |
45 | static pthread_barrier_t barr_ready; | |
46 | static pthread_barrier_t barr_cont; | |
47 | ||
48 | static void * | |
49 | thread_function (void * arg __attribute__ ((unused))) | |
50 | { | |
51 | while (!finished) | |
52 | { | |
53 | int res = pthread_barrier_wait (&barr_ready); | |
54 | ||
55 | if (res != 0 && res != PTHREAD_BARRIER_SERIAL_THREAD) | |
56 | { | |
57 | printf ("barrier wait failed: %m\n"); | |
58 | exit (1); | |
59 | } | |
60 | ||
61 | int mode = prctl (PR_GET_FP_MODE); | |
62 | ||
63 | if (mode != current_mode) | |
64 | { | |
65 | printf ("unexpected mode: %d != %d\n", mode, current_mode); | |
66 | exit (1); | |
67 | } | |
68 | ||
69 | res = pthread_barrier_wait (&barr_cont); | |
70 | ||
71 | if (res != 0 && res != PTHREAD_BARRIER_SERIAL_THREAD) | |
72 | { | |
73 | printf ("barrier wait failed: %m\n"); | |
74 | exit (1); | |
75 | } | |
76 | } | |
77 | return NULL; | |
78 | } | |
79 | ||
0cdaef4d AJ |
80 | static int |
81 | do_test (void) | |
0bd95672 MF |
82 | { |
83 | int count = sysconf (_SC_NPROCESSORS_ONLN); | |
84 | if (count <= 0) | |
85 | count = 1; | |
86 | count *= 4; | |
87 | ||
88 | pthread_t th[count]; | |
89 | int i; | |
90 | int result = 0; | |
91 | ||
92 | if (pthread_barrier_init (&barr_ready, NULL, count + 1) != 0) | |
93 | { | |
94 | printf ("failed to initialize barrier: %m\n"); | |
95 | exit (1); | |
96 | } | |
97 | ||
98 | if (pthread_barrier_init (&barr_cont, NULL, count + 1) != 0) | |
99 | { | |
100 | printf ("failed to initialize barrier: %m\n"); | |
101 | exit (1); | |
102 | } | |
103 | ||
104 | for (i = 0; i < count; ++i) | |
105 | if (pthread_create (&th[i], NULL, thread_function, 0) != 0) | |
106 | { | |
107 | printf ("creation of thread %d failed\n", i); | |
108 | exit (1); | |
109 | } | |
110 | ||
111 | for (i = 0 ; i < 7 ; i++) | |
112 | { | |
113 | if (prctl (PR_SET_FP_MODE, mode[i % 6]) != 0) | |
114 | { | |
115 | if (errno != ENOTSUP) | |
116 | { | |
117 | printf ("prctl PR_SET_FP_MODE failed: %m"); | |
118 | exit (1); | |
119 | } | |
120 | } | |
121 | else | |
122 | current_mode = mode[i % 6]; | |
123 | ||
124 | ||
125 | int res = pthread_barrier_wait (&barr_ready); | |
126 | ||
127 | if (res != 0 && res != PTHREAD_BARRIER_SERIAL_THREAD) | |
128 | { | |
129 | printf ("barrier wait failed: %m\n"); | |
130 | exit (1); | |
131 | } | |
132 | ||
133 | if (i == 6) | |
134 | finished = 1; | |
135 | ||
136 | res = pthread_barrier_wait (&barr_cont); | |
137 | ||
138 | if (res != 0 && res != PTHREAD_BARRIER_SERIAL_THREAD) | |
139 | { | |
140 | printf ("barrier wait failed: %m\n"); | |
141 | exit (1); | |
142 | } | |
143 | } | |
144 | ||
145 | for (i = 0; i < count; ++i) | |
146 | { | |
147 | void *v; | |
148 | if (pthread_join (th[i], &v) != 0) | |
149 | { | |
150 | printf ("join of thread %d failed\n", i); | |
151 | result = 1; | |
152 | } | |
153 | else if (v != NULL) | |
154 | { | |
155 | printf ("join %d successful, but child failed\n", i); | |
156 | result = 1; | |
157 | } | |
158 | else | |
159 | printf ("join %d successful\n", i); | |
160 | } | |
161 | ||
162 | return result; | |
163 | } | |
0cdaef4d AJ |
164 | |
165 | #define TEST_FUNCTION do_test () | |
166 | #include "../../test-skeleton.c" |