1 /*
2 * This file is part of rt_sigpending 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_sigpending
34
35 # include <assert.h>
36 # include <signal.h>
37 # include <stdio.h>
38 # include <string.h>
39 # include <unistd.h>
40
41 static long
k_sigpending(void * const set,const unsigned long size)42 k_sigpending(void *const set, const unsigned long size)
43 {
44 return syscall(__NR_rt_sigpending, set, size);
45 }
46
47 static void
iterate(const char * const text,unsigned int size,void * set)48 iterate(const char *const text, unsigned int size, void *set)
49 {
50 for (;;) {
51 if (k_sigpending(set, size)) {
52 tprintf("rt_sigpending(%p, %u) = -1 EFAULT (%m)\n",
53 set, size);
54 break;
55 }
56 if (size) {
57 #if WORDS_BIGENDIAN
58 if (size < sizeof(long))
59 tprintf("rt_sigpending(%s, %u) = 0\n",
60 "[]", size);
61 else
62 #endif
63 tprintf("rt_sigpending(%s, %u) = 0\n",
64 text, size);
65 } else {
66 tprintf("rt_sigpending(%p, %u) = 0\n", set, size);
67 break;
68 }
69 size >>= 1;
70 set += size;
71 }
72 }
73
74 int
main(void)75 main(void)
76 {
77 tprintf("%s", "");
78
79 const unsigned int big_size = 1024 / 8;
80 void *k_set = tail_alloc(big_size);
81 sigset_t *const libc_set = tail_alloc(sizeof(sigset_t));
82
83 sigemptyset(libc_set);
84 if (sigprocmask(SIG_SETMASK, libc_set, NULL))
85 perror_msg_and_fail("sigprocmask");
86
87 memset(k_set, 0, big_size);
88 unsigned int set_size = big_size;
89 for (; set_size; set_size >>= 1, k_set += set_size) {
90 if (!k_sigpending(k_set, set_size))
91 break;
92 tprintf("rt_sigpending(%p, %u) = -1 EINVAL (%m)\n",
93 k_set, set_size);
94 }
95 if (!set_size)
96 perror_msg_and_fail("rt_sigpending");
97 tprintf("rt_sigpending(%s, %u) = 0\n", "[]", set_size);
98
99 iterate("[]", set_size >> 1, k_set + (set_size >> 1));
100
101 void *const efault = k_set + (set_size >> 1);
102 assert(k_sigpending(efault, set_size) == -1);
103 tprintf("rt_sigpending(%p, %u) = -1 EFAULT (%m)\n",
104 efault, set_size);
105
106 sigaddset(libc_set, SIGHUP);
107 if (sigprocmask(SIG_SETMASK, libc_set, NULL))
108 perror_msg_and_fail("sigprocmask");
109 raise(SIGHUP);
110
111 iterate("[HUP]", set_size, k_set);
112
113 sigaddset(libc_set, SIGINT);
114 if (sigprocmask(SIG_SETMASK, libc_set, NULL))
115 perror_msg_and_fail("sigprocmask");
116 raise(SIGINT);
117
118 iterate("[HUP INT]", set_size, k_set);
119
120 tprintf("+++ exited with 0 +++\n");
121 return 0;
122 }
123
124 #else
125
126 SKIP_MAIN_UNDEFINED("__NR_rt_sigpending")
127
128 #endif
129