1 /*
2 * Check decoding of set_mempolicy syscall.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016-2018 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_set_mempolicy
35
36 # include <errno.h>
37 # include <stdio.h>
38 # include <string.h>
39 # include <unistd.h>
40
41 # include "xlat.h"
42 # include "xlat/policies.h"
43
44 # define MAX_STRLEN 3
45 # define NLONGS(n) ((n + 8 * sizeof(long) - 2) \
46 / (8 * sizeof(long)))
47
48 static void
print_nodes(const unsigned long maxnode,unsigned int offset)49 print_nodes(const unsigned long maxnode, unsigned int offset)
50 {
51 unsigned int nlongs = NLONGS(maxnode);
52 if (nlongs <= offset)
53 nlongs = 0;
54 else
55 nlongs -= offset;
56 const unsigned int size = nlongs * sizeof(long);
57 unsigned long *const nodemask =
58 tail_alloc(size ? size : (offset ? 1 : 0));
59 memset(nodemask, 0, size);
60
61 long rc = syscall(__NR_set_mempolicy, 0, nodemask, maxnode);
62 const char *errstr = sprintrc(rc);
63
64 fputs("set_mempolicy(MPOL_DEFAULT, ", stdout);
65
66 if (nlongs) {
67 putc('[', stdout);
68 unsigned int i;
69 for (i = 0; i < nlongs + offset; ++i) {
70 if (i)
71 fputs(", ", stdout);
72 if (i < nlongs) {
73 if (i >= MAX_STRLEN) {
74 fputs("...", stdout);
75 break;
76 }
77 printf("%#0*lx", (int) sizeof(long) * 2 + 2,
78 nodemask[i]);
79 } else {
80 printf("... /* %p */", nodemask + i);
81 break;
82 }
83 }
84 putc(']', stdout);
85 } else {
86 if (maxnode)
87 printf("%p", nodemask);
88 else
89 printf("[]");
90 }
91
92 printf(", %lu) = %s\n", maxnode, errstr);
93 }
94
95 static void
test_offset(const unsigned int offset)96 test_offset(const unsigned int offset)
97 {
98 unsigned long maxnode = get_page_size() * 8;
99
100 print_nodes(maxnode, offset);
101 print_nodes(maxnode + 1, offset);
102 print_nodes(maxnode + 2, offset);
103
104 maxnode = sizeof(long) * 8;
105 print_nodes(0, offset);
106 print_nodes(1, offset);
107 print_nodes(2, offset);
108 print_nodes(maxnode - 1, offset);
109 print_nodes(maxnode , offset);
110 print_nodes(maxnode + 1, offset);
111 print_nodes(maxnode + 2, offset);
112 print_nodes(maxnode * 2 - 1, offset);
113 print_nodes(maxnode * 2 , offset);
114 print_nodes(maxnode * 2 + 1, offset);
115 print_nodes(maxnode * 2 + 2, offset);
116 print_nodes(maxnode * 3 - 1, offset);
117 print_nodes(maxnode * 3 , offset);
118 print_nodes(maxnode * 3 + 1, offset);
119 print_nodes(maxnode * 3 + 2, offset);
120 print_nodes(maxnode * 4 + 2, offset);
121 }
122
123 int
main(void)124 main(void)
125 {
126 if (syscall(__NR_set_mempolicy, 0, 0, 0))
127 perror_msg_and_skip("set_mempolicy");
128 puts("set_mempolicy(MPOL_DEFAULT, NULL, 0) = 0");
129
130 const unsigned long *nodemask = (void *) 0xfacefeedfffffffeULL;
131 const unsigned long maxnode = (unsigned long) 0xcafef00dbadc0dedULL;
132 long rc = syscall(__NR_set_mempolicy, 1, nodemask, maxnode);
133 printf("set_mempolicy(MPOL_PREFERRED, %p, %lu) = %s\n",
134 nodemask, maxnode, sprintrc(rc));
135
136 test_offset(0);
137 test_offset(1);
138
139 puts("+++ exited with 0 +++");
140 return 0;
141 }
142
143 #else
144
145 SKIP_MAIN_UNDEFINED("__NR_set_mempolicy")
146
147 #endif
148