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 *
db_lwp_first(void)49 db_lwp_first(void)
50 {
51
52 return db_read_ptr("alllwp");
53 }
54
55 lwp_t *
db_lwp_next(lwp_t * l)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
db_lwp_whatis(uintptr_t addr,void (* pr)(const char *,...))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