1 /*
2 * This file is part of rt_sigsuspend strace test.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "tests.h"
31 #include <asm/unistd.h>
32
33 #ifdef __NR_rt_sigsuspend
34
35 # include <assert.h>
36 # include <errno.h>
37 # include <signal.h>
38 # include <stdio.h>
39 # include <stdint.h>
40 # include <string.h>
41 # include <unistd.h>
42
43 static long
k_sigsuspend(const sigset_t * const set,const unsigned long size)44 k_sigsuspend(const sigset_t *const set, const unsigned long size)
45 {
46 return syscall(__NR_rt_sigsuspend, set, size);
47 }
48
49 static void
iterate(const char * const text,const int sig,const void * const set,unsigned int size)50 iterate(const char *const text, const int sig,
51 const void *const set, unsigned int size)
52 {
53 const void *mask;
54
55 for (mask = set;; size >>= 1, mask += size) {
56 raise(sig);
57 assert(k_sigsuspend(mask, size) == -1);
58 if (EINTR == errno) {
59 tprintf("rt_sigsuspend(%s, %u) = ? ERESTARTNOHAND"
60 " (To be restarted if no handler)\n",
61 text, size);
62 } else {
63 if (size < sizeof(long))
64 tprintf("rt_sigsuspend(%p, %u)"
65 " = -1 EINVAL (%m)\n",
66 mask, size);
67 else
68 tprintf("rt_sigsuspend(%s, %u)"
69 " = -1 EINVAL (%m)\n",
70 set == mask ? text : "~[]", size);
71 }
72 if (!size)
73 break;
74 }
75 }
76
77 static void
handler(int signo)78 handler(int signo)
79 {
80 }
81
82 int
main(void)83 main(void)
84 {
85 tprintf("%s", "");
86
87 const unsigned int big_size = 1024 / 8;
88 void *k_set = tail_alloc(big_size);
89 memset(k_set, 0, big_size);
90
91 sigset_t *const libc_set = tail_alloc(sizeof(sigset_t));
92 sigemptyset(libc_set);
93 sigaddset(libc_set, SIGUSR1);
94 if (sigprocmask(SIG_SETMASK, libc_set, NULL))
95 perror_msg_and_fail("sigprocmask");
96
97 const struct sigaction sa = {
98 .sa_handler = handler
99 };
100 if (sigaction(SIGUSR1, &sa, NULL))
101 perror_msg_and_fail("sigaction");
102
103 raise(SIGUSR1);
104 unsigned int set_size = big_size;
105 for (; set_size; set_size >>= 1, k_set += set_size) {
106 assert(k_sigsuspend(k_set, set_size) == -1);
107 if (EINTR == errno)
108 break;
109 tprintf("rt_sigsuspend(%p, %u) = -1 EINVAL (%m)\n",
110 k_set, set_size);
111 }
112 if (!set_size)
113 perror_msg_and_fail("rt_sigsuspend");
114 tprintf("rt_sigsuspend([], %u) = ? ERESTARTNOHAND"
115 " (To be restarted if no handler)\n", set_size);
116
117 sigemptyset(libc_set);
118 sigaddset(libc_set, SIGUSR2);
119 memcpy(k_set, libc_set, set_size);
120 raise(SIGUSR1);
121 assert(k_sigsuspend(k_set, set_size) == -1);
122 assert(EINTR == errno);
123 tprintf("rt_sigsuspend([USR2], %u) = ? ERESTARTNOHAND"
124 " (To be restarted if no handler)\n", set_size);
125
126 sigaddset(libc_set, SIGHUP);
127 memcpy(k_set, libc_set, set_size);
128 raise(SIGUSR1);
129 assert(k_sigsuspend(k_set, set_size) == -1);
130 assert(EINTR == errno);
131 tprintf("rt_sigsuspend([HUP USR2], %u) = ? ERESTARTNOHAND"
132 " (To be restarted if no handler)\n", set_size);
133
134 sigaddset(libc_set, SIGINT);
135 memcpy(k_set, libc_set, set_size);
136 raise(SIGUSR1);
137 assert(k_sigsuspend(k_set, set_size) == -1);
138 assert(EINTR == errno);
139 tprintf("rt_sigsuspend([HUP INT USR2], %u) = ? ERESTARTNOHAND"
140 " (To be restarted if no handler)\n", set_size);
141
142 memset(libc_set, -1, sizeof(*libc_set));
143 sigdelset(libc_set, SIGUSR1);
144 memcpy(k_set, libc_set, set_size);
145 raise(SIGUSR1);
146 assert(k_sigsuspend(k_set, set_size) == -1);
147 assert(EINTR == errno);
148 tprintf("rt_sigsuspend(~[USR1], %u) = ? ERESTARTNOHAND"
149 " (To be restarted if no handler)\n", set_size);
150
151 assert(k_sigsuspend(k_set - set_size, set_size << 1) == -1);
152 tprintf("rt_sigsuspend(%p, %u) = -1 EINVAL (%m)\n",
153 k_set - set_size, set_size << 1);
154
155 iterate("~[USR1]", SIGUSR1, k_set, set_size >> 1);
156
157 tprintf("+++ exited with 0 +++\n");
158 return 0;
159 }
160
161 #else
162
163 SKIP_MAIN_UNDEFINED("__NR_rt_sigsuspend")
164
165 #endif
166