kern_sdt.c revision 262325 
1/*-
2 * Copyright 2006-2008 John Birrell <jb@FreeBSD.org>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD: head/sys/kern/kern_sdt.c 262325 2014-02-22 01:41:45Z markj $
26 */
27
28#include <sys/param.h>
29#include <sys/systm.h>
30#include <sys/kdb.h>
31#include <sys/sdt.h>
32
33SDT_PROVIDER_DEFINE(sdt);
34
35/*
36 * Hook for the DTrace probe function. The SDT provider will set this to
37 * dtrace_probe() when it loads.
38 */
39sdt_probe_func_t sdt_probe_func = sdt_probe_stub;
40
41/*
42 * This is a stub for probe calls in case kernel DTrace support isn't
43 * enabled. It should never get called because there is no DTrace support
44 * to enable it.
45 */
46void
47sdt_probe_stub(uint32_t id, uintptr_t arg0, uintptr_t arg1,
48    uintptr_t arg2, uintptr_t arg3, uintptr_t arg4)
49{
50
51	printf("sdt_probe_stub: unexpectedly called\n");
52	kdb_backtrace();
53}
54