1 /* $NetBSD: db_lwp.c,v 1.7 2011/04/12 08:42:12 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: db_lwp.c,v 1.7 2011/04/12 08:42:12 mrg Exp $"); 34 35 #ifndef _KERNEL 36 #include <stdbool.h> 37 #endif 38 39 #include <sys/param.h> 40 #include <sys/cpu.h> 41 #include <sys/proc.h> 42 #include <sys/cpu.h> 43 44 #include <machine/pcb.h> 45 46 #include <ddb/ddb.h> 47 48 lwp_t * 49 db_lwp_first(void) 50 { 51 52 return db_read_ptr("alllwp"); 53 } 54 55 lwp_t * 56 db_lwp_next(lwp_t *l) 57 { 58 59 db_read_bytes((db_addr_t)&l->l_list.le_next, sizeof(l), (char *)&l); 60 return l; 61 } 62 63 void 64 db_lwp_whatis(uintptr_t addr, void (*pr)(const char *, ...)) 65 { 66 uintptr_t stack; 67 lwp_t l, *lp; 68 69 for (lp = db_lwp_first(); lp != NULL; lp = db_lwp_next(lp)) { 70 db_read_bytes((db_addr_t)lp, sizeof(l), (char *)&l); 71 stack = (uintptr_t)KSTACK_LOWEST_ADDR((&l)); 72 if (addr < stack || stack + KSTACK_SIZE <= addr) { 73 continue; 74 } 75 (*pr)("%p is %p+%zu, LWP %p's stack\n", 76 (void *)addr, (void *)stack, 77 (size_t)(addr - stack), lp); 78 } 79 } 80