1 /* 2 * This file is part of count-f strace test. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "tests.h" 31 #include <assert.h> 32 #include <errno.h> 33 #include <pthread.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <sys/wait.h> 37 #include <unistd.h> 38 39 #define N 32 40 #define P 8 41 #define T 4 42 43 static void * 44 thread(void *arg) 45 { 46 unsigned int i; 47 48 assert(chdir(".") == 0); 49 for (i = 0; i < N; ++i) { 50 assert(chdir("") == -1); 51 assert(chdir(".") == 0); 52 } 53 54 return NULL; 55 } 56 57 static int 58 process(void) 59 { 60 unsigned int i; 61 pthread_t t[T]; 62 63 for (i = 0; i < T; ++i) { 64 errno = pthread_create(&t[i], NULL, thread, NULL); 65 if (errno) 66 perror_msg_and_fail("pthread_create"); 67 } 68 69 for (i = 0; i < T; ++i) { 70 void *retval; 71 errno = pthread_join(t[i], &retval); 72 if (errno) 73 perror_msg_and_fail("pthread_join"); 74 } 75 76 return 0; 77 } 78 79 int 80 main(void) 81 { 82 unsigned int i; 83 pid_t p[P]; 84 85 for (i = 0; i < P; ++i) { 86 p[i] = fork(); 87 if (p[i] < 0) 88 perror_msg_and_fail("fork"); 89 if (!p[i]) 90 return process(); 91 } 92 for (i = 0; i < P; ++i) { 93 int s; 94 95 assert(waitpid(p[i], &s, 0) == p[i]); 96 assert(WIFEXITED(s)); 97 if (WEXITSTATUS(s)) 98 return WEXITSTATUS(s); 99 } 100 101 return 0; 102 } 103
