1 /* 2 * 3 * Copyright (c) International Business Machines Corp., 2002 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /* 12/20/2002 Port to LTP robbiew (at) us.ibm.com */ 21 /* 06/30/2001 Port to Linux nsharoff (at) us.ibm.com */ 22 23 /* 24 * NAME 25 * shmt09 26 * 27 * CALLS 28 * sbrk(2) shmctl(2) shmget(2) 29 * 30 * ALGORITHM 31 * Create a shared memory segment and attach at the default address. 32 * Increase the size of the data segment. 33 * Attach at an address that is less than the break value: should FAIL. 34 * decrease the size of the data segment. 35 * Attach at 4K past the break value: should SUCCEED. 36 * Sbrk() past the attached segment: should FAIL. 37 * 38 */ 39 40 #include <stdio.h> 41 #include <sys/types.h> 42 #include <sys/ipc.h> 43 #include <sys/shm.h> 44 #include <errno.h> 45 #include <unistd.h> 46 47 #define K_1 1024 48 49 #define SHMBYTES (SHMLBA - 1) 50 #define SHMALIGN(p) (((unsigned long)(p) + SHMBYTES) & ~SHMBYTES) 51 52 /** LTP Port **/ 53 #include "test.h" 54 55 char *TCID = "shmt09"; /* Test program identifier. */ 56 int TST_TOTAL = 4; /* Total number of test cases. */ 57 /**************/ 58 59 #ifdef __ia64__ 60 #define INCREMENT 8388608 /* 8Mb */ 61 #elif defined (__mips__) || defined (__hppa__) || defined (__sparc__) 62 #define INCREMENT 262144 /* 256Kb */ 63 #elif defined __sh__ || defined (__arm__) || defined(__aarch64__) 64 #define INCREMENT 16384 /* 16kb */ 65 #else 66 #define INCREMENT SHMLBA 67 #endif 68 69 static int rm_shm(int); 70 71 int main(void) 72 { 73 char *c1 = NULL, *c2 = NULL, *c3 = NULL; 74 void *vp; 75 int shmid; 76 key_t key; 77 78 key = (key_t) getpid(); 79 80 /*-----------------------------------------------------------*/ 81 82 if ((unsigned long)sbrk(16384) >= (-4095UL)) { 83 perror("sbrk"); 84 tst_brkm(TFAIL, NULL, "Error: sbrk failed, errno = %d\n", 85 errno); 86 } 87 88 if ((unsigned long)sbrk(-4097) >= (-4095UL)) { 89 perror("sbrk"); 90 tst_brkm(TFAIL, NULL, "Error: sbrk failed, errno = %d\n", 91 errno); 92 } 93 94 if ((shmid = shmget(key, 10 * K_1, IPC_CREAT | 0666)) < 0) { 95 perror("shmget"); 96 tst_brkm(TFAIL, 97 NULL, 98 "Error: shmget Failed, shmid = %d, errno = %d\n", 99 shmid, errno); 100 } 101 102 c1 = shmat(shmid, NULL, 0); 103 if (c1 == (char *)-1) { 104 perror("shmat"); 105 tst_resm(TFAIL, 106 "Error: shmat Failed, shmid = %d, errno = %d\n", 107 shmid, errno); 108 rm_shm(shmid); 109 tst_exit(); 110 } 111 112 tst_resm(TPASS, "sbrk, sbrk, shmget, shmat"); 113 114 /*--------------------------------------------------------*/ 115 116 if ((unsigned long)sbrk(32 * K_1) >= (-4095UL)) { 117 perror("sbrk"); 118 tst_resm(TFAIL, "Error: sbrk failed, errno = %d\n", errno); 119 rm_shm(shmid); 120 tst_exit(); 121 } 122 vp = (void *)((char *)sbrk(0) - 2 * K_1); 123 c2 = shmat(shmid, vp, 0); 124 if (c2 != (char *)-1) { 125 tst_resm(TFAIL, 126 "ERROR: shmat: succeeded!: shmid = %d, shmaddr = %p, " 127 "att_addr = %p", shmid, c2, vp); 128 rm_shm(shmid); 129 tst_exit(); 130 } 131 132 tst_resm(TPASS, "sbrk, shmat"); 133 134 /*---------------------------------------------------------*/ 135 136 if ((unsigned long)sbrk(-16000) >= (-4095UL)) { 137 perror("sbrk"); 138 tst_resm(TFAIL, "Error: sbrk failed, errno = %d\n", errno); 139 rm_shm(shmid); 140 tst_exit(); 141 } 142 #ifdef __mips__ 143 vp = (void *)((char *)sbrk(0) + 256 * K_1); 144 #elif defined(__powerpc__) || defined(__powerpc64__) 145 vp = (void *)((char *)sbrk(0) + getpagesize()); 146 #else 147 /* SHM_RND rounds vp on the nearest multiple of SHMLBA */ 148 vp = (void *)SHMALIGN((char *)sbrk(0) + 1); 149 #endif 150 151 c3 = shmat(shmid, vp, SHM_RND); 152 if (c3 == (char *)-1) { 153 perror("shmat1"); 154 tst_resm(TFAIL, 155 "Error: shmat Failed, shmid = %d, errno = %d\n", 156 shmid, errno); 157 rm_shm(shmid); 158 tst_exit(); 159 } 160 161 tst_resm(TPASS, "sbrk, shmat"); 162 163 /*--------------------------------------------------------*/ 164 #if defined (__ia64__) || defined(__mips__) || defined(__hppa__) || defined(__arm__) || defined(__aarch64__) 165 while ((vp = sbrk(INCREMENT)) != (void *)-1) ; 166 if (errno != ENOMEM) { 167 tst_resm(TFAIL, "Error: sbrk failed, errno = %d\n", errno); 168 rm_shm(shmid); 169 tst_exit(); 170 } 171 #else 172 if ((vp = sbrk(INCREMENT)) != (void *)-1) { 173 tst_resm(TFAIL, 174 "Error: sbrk succeeded! ret = %p, curbrk = %p, ", 175 vp, sbrk(0)); 176 rm_shm(shmid); 177 tst_exit(); 178 } 179 #endif 180 181 tst_resm(TPASS, "sbrk"); 182 183 /*------------------------------------------------------*/ 184 185 rm_shm(shmid); 186 tst_exit(); 187 } 188 189 static int rm_shm(int shmid) 190 { 191 if (shmctl(shmid, IPC_RMID, NULL) == -1) { 192 perror("shmctl"); 193 tst_brkm(TFAIL, 194 NULL, 195 "shmctl Failed to remove: shmid = %d, errno = %d\n", 196 shmid, errno); 197 } 198 return (0); 199 } 200
