mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
278 lines
6.4 KiB
C
278 lines
6.4 KiB
C
/*-
|
|
* Copyright (c) 2005 Antoine Brodin
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "opt_ddb.h"
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#ifdef KTR
|
|
#include <sys/ktr.h>
|
|
#endif
|
|
#include <sys/linker.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/sbuf.h>
|
|
#include <sys/stack.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
FEATURE(stack, "Support for capturing kernel stack");
|
|
|
|
static MALLOC_DEFINE(M_STACK, "stack", "Stack Traces");
|
|
|
|
static int stack_symbol(vm_offset_t pc, char *namebuf, u_int buflen,
|
|
long *offset);
|
|
static int stack_symbol_ddb(vm_offset_t pc, const char **name, long *offset);
|
|
|
|
struct stack *
|
|
stack_create(void)
|
|
{
|
|
struct stack *st;
|
|
|
|
st = malloc(sizeof *st, M_STACK, M_WAITOK | M_ZERO);
|
|
return (st);
|
|
}
|
|
|
|
void
|
|
stack_destroy(struct stack *st)
|
|
{
|
|
|
|
free(st, M_STACK);
|
|
}
|
|
|
|
int
|
|
stack_put(struct stack *st, vm_offset_t pc)
|
|
{
|
|
|
|
if (st->depth < STACK_MAX) {
|
|
st->pcs[st->depth++] = pc;
|
|
return (0);
|
|
} else
|
|
return (-1);
|
|
}
|
|
|
|
void
|
|
stack_copy(const struct stack *src, struct stack *dst)
|
|
{
|
|
|
|
*dst = *src;
|
|
}
|
|
|
|
void
|
|
stack_zero(struct stack *st)
|
|
{
|
|
|
|
bzero(st, sizeof *st);
|
|
}
|
|
|
|
void
|
|
stack_print(const struct stack *st)
|
|
{
|
|
char namebuf[64];
|
|
long offset;
|
|
int i;
|
|
|
|
KASSERT(st->depth <= STACK_MAX, ("bogus stack"));
|
|
for (i = 0; i < st->depth; i++) {
|
|
(void)stack_symbol(st->pcs[i], namebuf, sizeof(namebuf),
|
|
&offset);
|
|
printf("#%d %p at %s+%#lx\n", i, (void *)st->pcs[i],
|
|
namebuf, offset);
|
|
}
|
|
}
|
|
|
|
void
|
|
stack_print_short(const struct stack *st)
|
|
{
|
|
char namebuf[64];
|
|
long offset;
|
|
int i;
|
|
|
|
KASSERT(st->depth <= STACK_MAX, ("bogus stack"));
|
|
for (i = 0; i < st->depth; i++) {
|
|
if (i > 0)
|
|
printf(" ");
|
|
if (stack_symbol(st->pcs[i], namebuf, sizeof(namebuf),
|
|
&offset) == 0)
|
|
printf("%s+%#lx", namebuf, offset);
|
|
else
|
|
printf("%p", (void *)st->pcs[i]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
void
|
|
stack_print_ddb(const struct stack *st)
|
|
{
|
|
const char *name;
|
|
long offset;
|
|
int i;
|
|
|
|
KASSERT(st->depth <= STACK_MAX, ("bogus stack"));
|
|
for (i = 0; i < st->depth; i++) {
|
|
stack_symbol_ddb(st->pcs[i], &name, &offset);
|
|
printf("#%d %p at %s+%#lx\n", i, (void *)st->pcs[i],
|
|
name, offset);
|
|
}
|
|
}
|
|
|
|
#ifdef DDB
|
|
void
|
|
stack_print_short_ddb(const struct stack *st)
|
|
{
|
|
const char *name;
|
|
long offset;
|
|
int i;
|
|
|
|
KASSERT(st->depth <= STACK_MAX, ("bogus stack"));
|
|
for (i = 0; i < st->depth; i++) {
|
|
if (i > 0)
|
|
printf(" ");
|
|
if (stack_symbol_ddb(st->pcs[i], &name, &offset) == 0)
|
|
printf("%s+%#lx", name, offset);
|
|
else
|
|
printf("%p", (void *)st->pcs[i]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Two print routines -- one for use from DDB and DDB-like contexts, the
|
|
* other for use in the live kernel.
|
|
*/
|
|
void
|
|
stack_sbuf_print(struct sbuf *sb, const struct stack *st)
|
|
{
|
|
char namebuf[64];
|
|
long offset;
|
|
int i;
|
|
|
|
KASSERT(st->depth <= STACK_MAX, ("bogus stack"));
|
|
for (i = 0; i < st->depth; i++) {
|
|
(void)stack_symbol(st->pcs[i], namebuf, sizeof(namebuf),
|
|
&offset);
|
|
sbuf_printf(sb, "#%d %p at %s+%#lx\n", i, (void *)st->pcs[i],
|
|
namebuf, offset);
|
|
}
|
|
}
|
|
|
|
#ifdef DDB
|
|
void
|
|
stack_sbuf_print_ddb(struct sbuf *sb, const struct stack *st)
|
|
{
|
|
const char *name;
|
|
long offset;
|
|
int i;
|
|
|
|
KASSERT(st->depth <= STACK_MAX, ("bogus stack"));
|
|
for (i = 0; i < st->depth; i++) {
|
|
(void)stack_symbol_ddb(st->pcs[i], &name, &offset);
|
|
sbuf_printf(sb, "#%d %p at %s+%#lx\n", i, (void *)st->pcs[i],
|
|
name, offset);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef KTR
|
|
void
|
|
stack_ktr(u_int mask, const char *file, int line, const struct stack *st,
|
|
u_int depth, int cheap)
|
|
{
|
|
#ifdef DDB
|
|
const char *name;
|
|
long offset;
|
|
int i;
|
|
#endif
|
|
|
|
KASSERT(st->depth <= STACK_MAX, ("bogus stack"));
|
|
if (cheap) {
|
|
ktr_tracepoint(mask, file, line, "#0 %p %p %p %p %p %p",
|
|
st->pcs[0], st->pcs[1], st->pcs[2], st->pcs[3],
|
|
st->pcs[4], st->pcs[5]);
|
|
if (st->depth <= 6)
|
|
return;
|
|
ktr_tracepoint(mask, file, line, "#1 %p %p %p %p %p %p",
|
|
st->pcs[6], st->pcs[7], st->pcs[8], st->pcs[9],
|
|
st->pcs[10], st->pcs[11]);
|
|
if (st->depth <= 12)
|
|
return;
|
|
ktr_tracepoint(mask, file, line, "#2 %p %p %p %p %p %p",
|
|
st->pcs[12], st->pcs[13], st->pcs[14], st->pcs[15],
|
|
st->pcs[16], st->pcs[17]);
|
|
#ifdef DDB
|
|
} else {
|
|
if (depth == 0 || st->depth < depth)
|
|
depth = st->depth;
|
|
for (i = 0; i < depth; i++) {
|
|
(void)stack_symbol_ddb(st->pcs[i], &name, &offset);
|
|
ktr_tracepoint(mask, file, line, "#%d %p at %s+%#lx",
|
|
i, st->pcs[i], (u_long)name, offset, 0, 0);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Two variants of stack symbol lookup -- one that uses the DDB interfaces
|
|
* and bypasses linker locking, and the other that doesn't.
|
|
*/
|
|
static int
|
|
stack_symbol(vm_offset_t pc, char *namebuf, u_int buflen, long *offset)
|
|
{
|
|
|
|
if (linker_search_symbol_name((caddr_t)pc, namebuf, buflen,
|
|
offset) != 0) {
|
|
*offset = 0;
|
|
strlcpy(namebuf, "??", buflen);
|
|
return (ENOENT);
|
|
} else
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
stack_symbol_ddb(vm_offset_t pc, const char **name, long *offset)
|
|
{
|
|
linker_symval_t symval;
|
|
c_linker_sym_t sym;
|
|
|
|
if (linker_ddb_search_symbol((caddr_t)pc, &sym, offset) != 0)
|
|
goto out;
|
|
if (linker_ddb_symbol_values(sym, &symval) != 0)
|
|
goto out;
|
|
if (symval.name != NULL) {
|
|
*name = symval.name;
|
|
return (0);
|
|
}
|
|
out:
|
|
*offset = 0;
|
|
*name = "??";
|
|
return (ENOENT);
|
|
}
|