sys/ddb/db_lwp.c

   1 /*      $NetBSD: db_lwp.c,v 1.4 2009/03/09 06:07:05 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 1.4 2009/03/09 06:07:05 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
  43 #include <ddb/ddb.h>
  44
  45 lwp_t *
  46 db_lwp_first(void)
  47 {
  48
  49         return db_read_ptr("alllwp");
  50 }
  51
  52 lwp_t *
  53 db_lwp_next(lwp_t *l)
  54 {
  55
  56         db_read_bytes((db_addr_t)&l->l_list.le_next, sizeof(l), (char *)&l);
  57         return l;
  58 }
  59
  60 void
  61 db_lwp_whatis(uintptr_t addr, void (*pr)(const char *, ...))
  62 {
  63         uintptr_t stack;
  64         lwp_t l, *lp;
  65
  66         for (lp = db_lwp_first(); lp != NULL; lp = db_lwp_next(lp)) {
  67                 db_read_bytes((db_addr_t)lp, sizeof(l), (char *)&l);
  68                 stack = (uintptr_t)KSTACK_LOWEST_ADDR((&l));
  69                 if (addr < stack || stack + KSTACK_SIZE <= addr) {
  70                         continue;
  71                 }
  72                 (*pr)("%p is %p+%zu, LWP %p's stack\n",
  73                     (void *)addr, (void *)stack,
  74                     (size_t)(addr - stack), lp);
  75         }
  76 }