1 /* 2 * Copyright (c) 2003 Hiten Pandya <hmp@backplane.com>. 3 * 4 * All rights reserved. 5 * 6 * Copyright (c) 1986, 1988, 1991, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice unmodified, this list of conditions, and the following 14 * disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR OR THE VOICES IN HIS HEAD BE LIABLE FOR ANY 26 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 * Adopted from: 34 * src/sys/kern/kern_shutdown.c 35 * 36 * $DragonFly: src/sys/kern/kern_debug.c,v 1.4 2004/02/14 03:54:36 hmp Exp $ 37 * 38 */ 39 40 /* 41 * Various debug routines. 42 * 43 */ 44 45 #include "opt_ddb.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 50 #include <ddb/ddb.h> 51 52 /* 53 * Simple DDB stack trace funtionality. 54 */ 55 void 56 backtrace(void) 57 { 58 59 #ifdef DDB 60 printf("Stack backtrace:\n"); 61 db_print_backtrace(); 62 #else 63 printf("Cannot print stack trace.\n"); 64 printf("DDB kernel option is needed.\n"); 65 #endif 66 } 67