1 /*
2  * This file is part of rt_sigpending 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_sigpending
35 
36 # include <assert.h>
37 # include <signal.h>
38 # include <stdio.h>
39 # include <string.h>
40 # include <unistd.h>
41 
42 static long
43 k_sigpending(void *const set, const unsigned long size)
44 {
45 	return syscall(__NR_rt_sigpending, set, size);
46 }
47 
48 static void
49 iterate(const char *const text, unsigned int size, void *set)
50 {
51 	for (;;) {
52 		if (k_sigpending(set, size)) {
53 			tprintf("rt_sigpending(%p, %u) = -1 EFAULT (%m)\n",
54 				set, size);
55 			break;
56 		}
57 		if (size) {
58 #if WORDS_BIGENDIAN
59 			if (size < sizeof(long))
60 				tprintf("rt_sigpending(%s, %u) = 0\n",
61 					"[]", size);
62 			else
63 #endif
64 				tprintf("rt_sigpending(%s, %u) = 0\n",
65 					text, size);
66 		} else {
67 			tprintf("rt_sigpending(%p, %u) = 0\n", set, size);
68 			break;
69 		}
70 		size >>= 1;
71 		set += size;
72 	}
73 }
74 
75 int
76 main(void)
77 {
78 	tprintf("%s", "");
79 
80 	const unsigned int big_size = 1024 / 8;
81 	void *k_set = tail_alloc(big_size);
82 	TAIL_ALLOC_OBJECT_CONST_PTR(sigset_t, libc_set);
83 
84 	sigemptyset(libc_set);
85 	if (sigprocmask(SIG_SETMASK, libc_set, NULL))
86 		perror_msg_and_fail("sigprocmask");
87 
88 	memset(k_set, 0, big_size);
89 	unsigned int set_size = big_size;
90 	for (; set_size; set_size >>= 1, k_set += set_size) {
91 		if (!k_sigpending(k_set, set_size))
92 			break;
93 		tprintf("rt_sigpending(%p, %u) = -1 EINVAL (%m)\n",
94 			k_set, set_size);
95 	}
96 	if (!set_size)
97 		perror_msg_and_fail("rt_sigpending");
98 	tprintf("rt_sigpending(%s, %u) = 0\n", "[]", set_size);
99 
100 	iterate("[]", set_size >> 1, k_set + (set_size >> 1));
101 
102 	void *const efault = k_set + (set_size >> 1);
103 	assert(k_sigpending(efault, set_size) == -1);
104 	tprintf("rt_sigpending(%p, %u) = -1 EFAULT (%m)\n",
105 		efault, set_size);
106 
107 	sigaddset(libc_set, SIGHUP);
108 	if (sigprocmask(SIG_SETMASK, libc_set, NULL))
109 		perror_msg_and_fail("sigprocmask");
110 	raise(SIGHUP);
111 
112 	iterate("[HUP]", set_size, k_set);
113 
114 	sigaddset(libc_set, SIGINT);
115 	if (sigprocmask(SIG_SETMASK, libc_set, NULL))
116 		perror_msg_and_fail("sigprocmask");
117 	raise(SIGINT);
118 
119 	iterate("[HUP INT]", set_size, k_set);
120 
121 	tprintf("+++ exited with 0 +++\n");
122 	return 0;
123 }
124 
125 #else
126 
127 SKIP_MAIN_UNDEFINED("__NR_rt_sigpending")
128 
129 #endif
130