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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <stdio.h> 30 #include "mtmalloc.h" 31 #include <unistd.h> 32 #include <thread.h> 33 #include <sys/types.h> 34 #include <sys/mman.h> 35 #include <fcntl.h> 36 #include <errno.h> 37 38 /* 39 * This file tests for swap space exhaustion 40 * 41 * cc -O -o exhaust exhaust.c -lmtmalloc 42 */ 43 44 void * be_thread(void *); 45 int iwin = 0; 46 47 main(int argc, char ** argv) 48 { 49 int ncpus; 50 thread_t tid[512]; 51 int fd; 52 caddr_t stacks[512]; 53 54 srand(getpid()); 55 ncpus = sysconf(_SC_NPROCESSORS_CONF); 56 57 fd = open("/dev/zero", O_RDONLY); 58 59 if (fd < 0) { 60 perror("open"); 61 exit(-1); 62 } 63 64 while (ncpus--) 65 stacks[ncpus] = mmap(0, 1<<23, PROT_READ|PROT_WRITE, 66 MAP_PRIVATE, fd, 0); 67 68 close(fd); 69 70 mallocctl(MTCHUNKSIZE, 150); 71 72 ncpus = sysconf(_SC_NPROCESSORS_CONF); 73 while (ncpus--) 74 thr_create(stacks[ncpus], 1<<23, be_thread, NULL, THR_BOUND, 75 &tid[ncpus]); 76 77 while (thr_join(NULL, NULL, NULL) == 0); 78 79 exit(0); 80 } 81 82 /* ARGSUSED */ 83 void * 84 be_thread(void *foo) 85 { 86 char *p; 87 88 if (iwin) { 89 printf("why am I here\n"); 90 return; 91 } 92 93 if ((p = malloc(rand())) == NULL) { 94 iwin = 1; 95 fprintf(stderr, "Errno is %d\n", errno); 96 perror("malloc"); 97 } else { 98 be_thread(NULL); 99 printf("free %p\n", p); 100 free(p); 101 } 102 103 } 104