1 | /* Copyright (C) 2014-2022 Free Software Foundation, Inc. |
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 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <pthread.h> |
20 | #include <stdio.h> |
21 | #include <stdlib.h> |
22 | #include <string.h> |
23 | #include <unistd.h> |
24 | #include <limits.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 mode changes do not clobber register state |
32 | in other threads. */ |
33 | |
34 | static volatile int finished; |
35 | static int mode[6] = |
36 | { |
37 | 0, |
38 | PR_FP_MODE_FR, |
39 | PR_FP_MODE_FR | PR_FP_MODE_FRE, |
40 | PR_FP_MODE_FR, |
41 | 0, |
42 | PR_FP_MODE_FR | PR_FP_MODE_FRE |
43 | }; |
44 | |
45 | static void * |
46 | thread_function (void * arg __attribute__ ((unused))) |
47 | { |
48 | volatile int i = 0; |
49 | volatile float f = 0.0; |
50 | volatile double d = 0.0; |
51 | |
52 | while (!finished) |
53 | { |
54 | if ((float) i != f || (double) i != d) |
55 | { |
56 | printf (format: "unexpected value: i(%d) f(%f) d(%f)\n" , i, f, d); |
57 | exit (1); |
58 | } |
59 | |
60 | if (i == 100) |
61 | { |
62 | i = 0; |
63 | f = 0.0; |
64 | d = 0.0; |
65 | } |
66 | |
67 | i++; |
68 | f++; |
69 | d++; |
70 | } |
71 | return NULL; |
72 | } |
73 | |
74 | static int |
75 | do_test (void) |
76 | { |
77 | int count = sysconf (_SC_NPROCESSORS_ONLN); |
78 | if (count <= 0) |
79 | count = 1; |
80 | count *= 4; |
81 | |
82 | pthread_t th[count]; |
83 | int i; |
84 | int result = 0; |
85 | |
86 | for (i = 0; i < count; ++i) |
87 | if (pthread_create (newthread: &th[i], NULL, start_routine: thread_function, arg: 0) != 0) |
88 | { |
89 | printf (format: "creation of thread %d failed\n" , i); |
90 | exit (1); |
91 | } |
92 | |
93 | for (i = 0 ; i < 1000000 ; i++) |
94 | { |
95 | if (prctl (PR_SET_FP_MODE, mode[i % 6]) != 0 |
96 | && errno != ENOTSUP) |
97 | { |
98 | printf (format: "prctl PR_SET_FP_MODE failed: %m\n" ); |
99 | exit (1); |
100 | } |
101 | } |
102 | |
103 | finished = 1; |
104 | |
105 | for (i = 0; i < count; ++i) |
106 | { |
107 | void *v; |
108 | if (pthread_join (th: th[i], thread_return: &v) != 0) |
109 | { |
110 | printf (format: "join of thread %d failed\n" , i); |
111 | result = 1; |
112 | } |
113 | else if (v != NULL) |
114 | { |
115 | printf (format: "join %d successful, but child failed\n" , i); |
116 | result = 1; |
117 | } |
118 | else |
119 | printf (format: "join %d successful\n" , i); |
120 | } |
121 | |
122 | return result; |
123 | } |
124 | |
125 | #define TEST_FUNCTION do_test () |
126 | #include "../../test-skeleton.c" |
127 | |