1 /* 2 * Copyright (c) 2014 Fujitsu Ltd. 3 * Author: Zeng Linggang <zenglg.jy (at) cn.fujitsu.com> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of version 2 of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 12 * 13 * You should have received a copy of the GNU General Public License along 14 * with this program; if not, write the Free Software Foundation, Inc., 15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 16 */ 17 /* 18 * DESCRIPTION 19 * Check sbrk() with error condition that should produce ENOMEM. 20 */ 21 22 #include <errno.h> 23 #include <unistd.h> 24 #include "test.h" 25 26 #define INC 16*1024*1024 27 28 char *TCID = "sbrk02"; 29 int TST_TOTAL = 1; 30 31 static void setup(void); 32 static void sbrk_verify(void); 33 static void cleanup(void); 34 35 static long increment = INC; 36 37 int main(int argc, char *argv[]) 38 { 39 int lc; 40 int i; 41 42 tst_parse_opts(argc, argv, NULL, NULL); 43 44 setup(); 45 46 for (lc = 0; TEST_LOOPING(lc); lc++) { 47 tst_count = 0; 48 for (i = 0; i < TST_TOTAL; i++) 49 sbrk_verify(); 50 } 51 52 cleanup(); 53 tst_exit(); 54 } 55 56 static void setup(void) 57 { 58 void *ret = NULL; 59 60 tst_sig(NOFORK, DEF_HANDLER, cleanup); 61 62 TEST_PAUSE; 63 64 /* call sbrk until it fails or increment overflows */ 65 while (ret != (void *)-1 && increment > 0) { 66 ret = sbrk(increment); 67 increment += INC; 68 } 69 tst_resm(TINFO | TERRNO, "setup() bailing inc: %ld, ret: %p, sbrk: %p", 70 increment, ret, sbrk(0)); 71 72 errno = 0; 73 } 74 75 static void sbrk_verify(void) 76 { 77 void *tret; 78 79 tret = sbrk(increment); 80 TEST_ERRNO = errno; 81 82 if (tret != (void *)-1) { 83 tst_resm(TFAIL, 84 "sbrk(%ld) returned %p, expected (void *)-1, errno=%d", 85 increment, tret, ENOMEM); 86 return; 87 } 88 89 if (TEST_ERRNO == ENOMEM) { 90 tst_resm(TPASS | TTERRNO, "sbrk(%ld) failed as expected", 91 increment); 92 } else { 93 tst_resm(TFAIL | TTERRNO, 94 "sbrk(%ld) failed unexpectedly; expected: %d - %s", 95 increment, ENOMEM, strerror(ENOMEM)); 96 } 97 } 98 99 static void cleanup(void) 100 { 101 } 102
