1 /* 2 * Copyright (C) 2015 Cyril Hrubis <chrubis (at) suse.cz> 3 * 4 * Licensed under the GNU GPLv2 or later. 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 * Block on a futex and wait for wakeup. 21 * 22 * This tests uses shared memory page to store the mutex variable. 23 */ 24 25 #include <sys/mman.h> 26 #include <sys/wait.h> 27 #include <errno.h> 28 29 #include "test.h" 30 #include "safe_macros.h" 31 #include "futextest.h" 32 #include "futex_common.h" 33 34 const char *TCID="futex_wait02"; 35 const int TST_TOTAL=1; 36 37 static void do_child(void) 38 { 39 int ret; 40 41 tst_process_state_wait2(getppid(), 'S'); 42 43 ret = futex_wake(futex, 1, 0); 44 45 if (ret != 1) 46 tst_brkm(TFAIL, NULL, "futex_wake() returned %i", ret); 47 48 exit(TPASS); 49 } 50 51 static void verify_futex_wait(void) 52 { 53 int res; 54 int pid; 55 56 pid = tst_fork(); 57 58 switch (pid) { 59 case 0: 60 do_child(); 61 break; 62 case -1: 63 tst_brkm(TBROK | TERRNO, NULL, "fork() failed"); 64 break; 65 default: 66 break; 67 } 68 69 res = futex_wait(futex, *futex, NULL, 0); 70 71 if (res) { 72 tst_resm(TFAIL, "futex_wait() returned %i, errno %s", 73 res, tst_strerrno(errno)); 74 } 75 76 SAFE_WAIT(NULL, &res); 77 78 if (WIFEXITED(res) && WEXITSTATUS(res) == TPASS) 79 tst_resm(TPASS, "futex_wait() woken up"); 80 else 81 tst_resm(TFAIL, "child failed"); 82 } 83 84 int main(int argc, char *argv[]) 85 { 86 int lc; 87 88 tst_parse_opts(argc, argv, NULL, NULL); 89 90 setup(); 91 92 for (lc = 0; TEST_LOOPING(lc); lc++) 93 verify_futex_wait(); 94 95 tst_exit(); 96 } 97
