2 * Copyright (c) 2005 Antoine Brodin
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/kernel.h>
35 #include <sys/linker.h>
36 #include <sys/malloc.h>
38 #include <sys/stack.h>
39 #include <sys/systm.h>
41 MALLOC_DEFINE(M_STACK, "stack", "Stack Traces");
43 static void stack_symbol(vm_offset_t pc, const char **name, long *offset);
50 st = malloc(sizeof *st, M_STACK, M_WAITOK | M_ZERO);
55 stack_destroy(struct stack *st)
62 stack_put(struct stack *st, vm_offset_t pc)
65 if (st->depth < STACK_MAX) {
66 st->pcs[st->depth++] = pc;
73 stack_copy(struct stack *src, struct stack *dst)
80 stack_zero(struct stack *st)
83 bzero(st, sizeof *st);
87 stack_print(struct stack *st)
93 KASSERT(st->depth <= STACK_MAX, ("bogus stack"));
94 for (i = 0; i < st->depth; i++) {
95 stack_symbol(st->pcs[i], &name, &offset);
96 printf("#%d %p at %s+%#lx\n", i, (void *)st->pcs[i],
102 stack_sbuf_print(struct sbuf *sb, struct stack *st)
108 KASSERT(st->depth <= STACK_MAX, ("bogus stack"));
109 for (i = 0; i < st->depth; i++) {
110 stack_symbol(st->pcs[i], &name, &offset);
111 sbuf_printf(sb, "#%d %p at %s+%#lx\n", i, (void *)st->pcs[i],
118 stack_ktr(u_int mask, const char *file, int line, struct stack *st, u_int depth,
125 KASSERT(st->depth <= STACK_MAX, ("bogus stack"));
127 ktr_tracepoint(mask, file, line, "#0 %p %p %p %p %p %p",
128 st->pcs[0], st->pcs[1], st->pcs[2], st->pcs[3],
129 st->pcs[4], st->pcs[5]);
132 ktr_tracepoint(mask, file, line, "#1 %p %p %p %p %p %p",
133 st->pcs[6], st->pcs[7], st->pcs[8], st->pcs[9],
134 st->pcs[10], st->pcs[11]);
137 ktr_tracepoint(mask, file, line, "#2 %p %p %p %p %p %p",
138 st->pcs[12], st->pcs[13], st->pcs[14], st->pcs[15],
139 st->pcs[16], st->pcs[17]);
141 if (depth == 0 || st->depth < depth)
143 for (i = 0; i < depth; i++) {
144 stack_symbol(st->pcs[i], &name, &offset);
145 ktr_tracepoint(mask, file, line, "#%d %p at %s+%#lx",
146 i, st->pcs[i], (u_long)name, offset, 0, 0);
153 stack_symbol(vm_offset_t pc, const char **name, long *offset)
155 linker_symval_t symval;
158 if (linker_ddb_search_symbol((caddr_t)pc, &sym, offset) != 0)
160 if (linker_ddb_symbol_values(sym, &symval) != 0)
162 if (symval.name != NULL) {
168 *name = "Unknown func";