1 /* 2 * Check decoding of set_mempolicy syscall. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) 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 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 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 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
