1 /*
2 * This file is part of rt_sigsuspend strace test.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016-2017 The strace developers.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "tests.h"
32 #include <asm/unistd.h>
33
34 #ifdef __NR_rt_sigsuspend
35
36 # include <assert.h>
37 # include <errno.h>
38 # include <signal.h>
39 # include <stdio.h>
40 # include <stdint.h>
41 # include <string.h>
42 # include <unistd.h>
43
44 static long
k_sigsuspend(const sigset_t * const set,const unsigned long size)45 k_sigsuspend(const sigset_t *const set, const unsigned long size)
46 {
47 return syscall(__NR_rt_sigsuspend, set, size);
48 }
49
50 static void
iterate(const char * const text,const int sig,const void * const set,unsigned int size)51 iterate(const char *const text, const int sig,
52 const void *const set, unsigned int size)
53 {
54 const void *mask;
55
56 for (mask = set;; size >>= 1, mask += size) {
57 raise(sig);
58 assert(k_sigsuspend(mask, size) == -1);
59 if (EINTR == errno) {
60 tprintf("rt_sigsuspend(%s, %u) = ? ERESTARTNOHAND"
61 " (To be restarted if no handler)\n",
62 text, size);
63 } else {
64 if (size < sizeof(long))
65 tprintf("rt_sigsuspend(%p, %u)"
66 " = -1 EINVAL (%m)\n",
67 mask, size);
68 else
69 tprintf("rt_sigsuspend(%s, %u)"
70 " = -1 EINVAL (%m)\n",
71 set == mask ? text : "~[]", size);
72 }
73 if (!size)
74 break;
75 }
76 }
77
78 static void
handler(int signo)79 handler(int signo)
80 {
81 }
82
83 int
main(void)84 main(void)
85 {
86 tprintf("%s", "");
87
88 const unsigned int big_size = 1024 / 8;
89 void *k_set = tail_alloc(big_size);
90 memset(k_set, 0, big_size);
91
92 TAIL_ALLOC_OBJECT_CONST_PTR(sigset_t, libc_set);
93 sigemptyset(libc_set);
94 sigaddset(libc_set, SIGUSR1);
95 if (sigprocmask(SIG_SETMASK, libc_set, NULL))
96 perror_msg_and_fail("sigprocmask");
97
98 const struct sigaction sa = {
99 .sa_handler = handler
100 };
101 if (sigaction(SIGUSR1, &sa, NULL))
102 perror_msg_and_fail("sigaction");
103
104 raise(SIGUSR1);
105 unsigned int set_size = big_size;
106 for (; set_size; set_size >>= 1, k_set += set_size) {
107 assert(k_sigsuspend(k_set, set_size) == -1);
108 if (EINTR == errno)
109 break;
110 tprintf("rt_sigsuspend(%p, %u) = -1 EINVAL (%m)\n",
111 k_set, set_size);
112 }
113 if (!set_size)
114 perror_msg_and_fail("rt_sigsuspend");
115 tprintf("rt_sigsuspend([], %u) = ? ERESTARTNOHAND"
116 " (To be restarted if no handler)\n", set_size);
117
118 sigemptyset(libc_set);
119 sigaddset(libc_set, SIGUSR2);
120 memcpy(k_set, libc_set, set_size);
121 raise(SIGUSR1);
122 assert(k_sigsuspend(k_set, set_size) == -1);
123 assert(EINTR == errno);
124 tprintf("rt_sigsuspend([USR2], %u) = ? ERESTARTNOHAND"
125 " (To be restarted if no handler)\n", set_size);
126
127 sigaddset(libc_set, SIGHUP);
128 memcpy(k_set, libc_set, set_size);
129 raise(SIGUSR1);
130 assert(k_sigsuspend(k_set, set_size) == -1);
131 assert(EINTR == errno);
132 tprintf("rt_sigsuspend([HUP USR2], %u) = ? ERESTARTNOHAND"
133 " (To be restarted if no handler)\n", set_size);
134
135 sigaddset(libc_set, SIGINT);
136 memcpy(k_set, libc_set, set_size);
137 raise(SIGUSR1);
138 assert(k_sigsuspend(k_set, set_size) == -1);
139 assert(EINTR == errno);
140 tprintf("rt_sigsuspend([HUP INT USR2], %u) = ? ERESTARTNOHAND"
141 " (To be restarted if no handler)\n", set_size);
142
143 memset(libc_set, -1, sizeof(*libc_set));
144 sigdelset(libc_set, SIGUSR1);
145 memcpy(k_set, libc_set, set_size);
146 raise(SIGUSR1);
147 assert(k_sigsuspend(k_set, set_size) == -1);
148 assert(EINTR == errno);
149 tprintf("rt_sigsuspend(~[USR1], %u) = ? ERESTARTNOHAND"
150 " (To be restarted if no handler)\n", set_size);
151
152 assert(k_sigsuspend(k_set - set_size, set_size << 1) == -1);
153 tprintf("rt_sigsuspend(%p, %u) = -1 EINVAL (%m)\n",
154 k_set - set_size, set_size << 1);
155
156 iterate("~[USR1]", SIGUSR1, k_set, set_size >> 1);
157
158 tprintf("+++ exited with 0 +++\n");
159 return 0;
160 }
161
162 #else
163
164 SKIP_MAIN_UNDEFINED("__NR_rt_sigsuspend")
165
166 #endif
167