db_lwp.c

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    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 }

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FreeBSD/Linux Kernel Cross Reference sys/ddb/db_lwp.c

FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_lwp.c