kern_sdt.c revision 1.1.2.2
1 1.1.2.2 yamt /* $NetBSD: kern_sdt.c,v 1.1.2.2 2010/03/11 15:04:17 yamt Exp $ */ 2 1.1.2.2 yamt 3 1.1.2.2 yamt /*- 4 1.1.2.2 yamt * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 1.1.2.2 yamt * All rights reserved. 6 1.1.2.2 yamt * 7 1.1.2.2 yamt * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 yamt * by CoyotePoint Systems, Inc. It was developed under contract to 9 1.1.2.2 yamt * CoyotePoint by Darran Hunt. 10 1.1.2.2 yamt * 11 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 12 1.1.2.2 yamt * modification, are permitted provided that the following conditions 13 1.1.2.2 yamt * are met: 14 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 15 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 16 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 17 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 18 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 19 1.1.2.2 yamt * 20 1.1.2.2 yamt * 21 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 1.1.2.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 1.1.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 1.1.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 1.1.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 1.1.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 1.1.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 1.1.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 1.1.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 1.1.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 1.1.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 32 1.1.2.2 yamt */ 33 1.1.2.2 yamt 34 1.1.2.2 yamt /*- 35 1.1.2.2 yamt * Copyright 2006-2008 John Birrell <jb (at) FreeBSD.org> 36 1.1.2.2 yamt * 37 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 38 1.1.2.2 yamt * modification, are permitted provided that the following conditions 39 1.1.2.2 yamt * are met: 40 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 41 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 42 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 43 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 44 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 45 1.1.2.2 yamt * 46 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 47 1.1.2.2 yamt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 48 1.1.2.2 yamt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 49 1.1.2.2 yamt * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 50 1.1.2.2 yamt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 51 1.1.2.2 yamt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 52 1.1.2.2 yamt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 53 1.1.2.2 yamt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 54 1.1.2.2 yamt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 55 1.1.2.2 yamt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 1.1.2.2 yamt * SUCH DAMAGE. 57 1.1.2.2 yamt * 58 1.1.2.2 yamt * $FreeBSD: src/sys/kern/kern_sdt.c,v 1.1.4.1 2009/08/03 08:13:06 kensmith Exp $ 59 1.1.2.2 yamt * 60 1.1.2.2 yamt * Backend for the Statically Defined Tracing (SDT) kernel support. This is 61 1.1.2.2 yamt * required to allow a module to load even though DTrace kernel support may 62 1.1.2.2 yamt * not be present. A module may be built with SDT probes in it. 63 1.1.2.2 yamt * 64 1.1.2.2 yamt */ 65 1.1.2.2 yamt 66 1.1.2.2 yamt #include <sys/cdefs.h> 67 1.1.2.2 yamt #include <sys/param.h> 68 1.1.2.2 yamt #include <sys/systm.h> 69 1.1.2.2 yamt #include <sys/sdt.h> 70 1.1.2.2 yamt 71 1.1.2.2 yamt void sdt_probe_stub(u_int32_t, uintptr_t, uintptr_t, 72 1.1.2.2 yamt uintptr_t, uintptr_t, uintptr_t); 73 1.1.2.2 yamt 74 1.1.2.2 yamt /* 75 1.1.2.2 yamt * Hook for the DTrace probe function. The 'sdt' provider will set this 76 1.1.2.2 yamt * to dtrace_probe when it loads. 77 1.1.2.2 yamt */ 78 1.1.2.2 yamt sdt_probe_func_t sdt_probe_func = sdt_probe_stub; 79 1.1.2.2 yamt 80 1.1.2.2 yamt /* 81 1.1.2.2 yamt * This is a stub for probe calls in case kernel DTrace support isn't 82 1.1.2.2 yamt * compiled in. It should never get called because there is no DTrace 83 1.1.2.2 yamt * support to enable it. 84 1.1.2.2 yamt */ 85 1.1.2.2 yamt void 86 1.1.2.2 yamt sdt_probe_stub(u_int32_t id, uintptr_t arg0, uintptr_t arg1, 87 1.1.2.2 yamt uintptr_t arg2, uintptr_t arg3, uintptr_t arg4) 88 1.1.2.2 yamt { 89 1.1.2.2 yamt printf("%s: XXX should not be called\n", __func__); 90 1.1.2.2 yamt } 91 1.1.2.2 yamt 92 1.1.2.2 yamt /* 93 1.1.2.2 yamt * initialize the SDT dtrace probe function 94 1.1.2.2 yamt */ 95 1.1.2.2 yamt void 96 1.1.2.2 yamt sdt_init(void *dtrace_probe) 97 1.1.2.2 yamt { 98 1.1.2.2 yamt 99 1.1.2.2 yamt sdt_probe_func = dtrace_probe; 100 1.1.2.2 yamt } 101 1.1.2.2 yamt 102 1.1.2.2 yamt /* 103 1.1.2.2 yamt * Disable the SDT dtrace probe function 104 1.1.2.2 yamt */ 105 1.1.2.2 yamt void 106 1.1.2.2 yamt sdt_exit(void) 107 1.1.2.2 yamt { 108 1.1.2.2 yamt 109 1.1.2.2 yamt sdt_probe_func = sdt_probe_stub; 110 1.1.2.2 yamt } 111
Indexes created Sun Sep 21 20:09:37 GMT 2025