/* $NetBSD: kern_sdt.c,v 1.4 2024/06/29 13:03:02 riastradh Exp $ */ /*- * Copyright (c) 2010 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by CoyotePoint Systems, Inc. It was developed under contract to * CoyotePoint by Darran Hunt. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /*- * Copyright 2006-2008 John Birrell * * 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 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 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. * * $FreeBSD: src/sys/kern/kern_sdt.c,v 1.1.4.1 2009/08/03 08:13:06 kensmith Exp $ * * Backend for the Statically Defined Tracing (SDT) kernel support. This is * required to allow a module to load even though DTrace kernel support may * not be present. A module may be built with SDT probes in it. * */ #ifdef _KERNEL_OPT #include "opt_dtrace.h" #endif #include #include #include #include SDT_PROVIDER_DEFINE(sdt); void sdt_probe_stub(u_int32_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t); __link_set_decl(sdt_providers_set, struct sdt_provider); __link_set_decl(sdt_probes_set, struct sdt_probe); __link_set_decl(sdt_argtypes_set, struct sdt_argtype); /* * Hook for the DTrace probe function. The 'sdt' provider will set this * to dtrace_probe when it loads. */ sdt_probe_func_t sdt_probe_func = sdt_probe_stub; /* * This is a stub for probe calls in case kernel DTrace support isn't * compiled in. It should never get called because there is no DTrace * support to enable it. */ void sdt_probe_stub(u_int32_t id, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t arg4) { struct sdt_provider * const * provider; struct sdt_probe * const * probe; struct sdt_argtype * const * argtype; printf("%s: XXX should not be called\n", __func__); printf("providers: "); __link_set_foreach(provider, sdt_providers_set) printf("%s ", (*provider)->name); printf("\nprobes: "); __link_set_foreach(probe, sdt_probes_set) printf("%s ", (*probe)->name); printf("\nargtypes: "); __link_set_foreach(argtype, sdt_argtypes_set) printf("%s ", (*argtype)->type); printf("\n"); } /* * initialize the SDT dtrace probe function */ void sdt_init(void *dtrace_probe) { sdt_probe_func = dtrace_probe; } /* * Disable the SDT dtrace probe function */ void sdt_exit(void) { sdt_probe_func = sdt_probe_stub; } SDT_PROBE_DEFINE1(sdt, , , set__error, "int");