1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1998-2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <stdio.h> 28 #include "mtmalloc.h" 29 #include <unistd.h> 30 #include <thread.h> 31 #include <sys/types.h> 32 #include <sys/mman.h> 33 #include <fcntl.h> 34 #include <errno.h> 35 36 /* 37 * This file tests for swap space exhaustion 38 * 39 * cc -O -o exhaust exhaust.c -lmtmalloc 40 */ 41 42 void * be_thread(void *); 43 int iwin = 0; 44 45 main(int argc, char ** argv) 46 { 47 int ncpus; 48 thread_t tid[512]; 49 int fd; 50 caddr_t stacks[512]; 51 52 srand(getpid()); 53 ncpus = sysconf(_SC_NPROCESSORS_CONF); 54 55 fd = open("/dev/zero", O_RDONLY); 56 57 if (fd < 0) { 58 perror("open"); 59 exit(-1); 60 } 61 62 while (ncpus--) 63 stacks[ncpus] = mmap(0, 1<<23, PROT_READ|PROT_WRITE, 64 MAP_PRIVATE, fd, 0); 65 66 close(fd); 67 68 mallocctl(MTCHUNKSIZE, 150); 69 70 ncpus = sysconf(_SC_NPROCESSORS_CONF); 71 while (ncpus--) 72 thr_create(stacks[ncpus], 1<<23, be_thread, NULL, THR_BOUND, 73 &tid[ncpus]); 74 75 while (thr_join(NULL, NULL, NULL) == 0); 76 77 exit(0); 78 } 79 80 /* ARGSUSED */ 81 void * 82 be_thread(void *foo) 83 { 84 char *p; 85 86 if (iwin) { 87 printf("why am I here\n"); 88 return; 89 } 90 91 if ((p = malloc(rand())) == NULL) { 92 iwin = 1; 93 fprintf(stderr, "Errno is %d\n", errno); 94 perror("malloc"); 95 } else { 96 be_thread(NULL); 97 printf("free %p\n", p); 98 free(p); 99 } 100 101 } 102